J-4 Statement of Work Liquid Argon Pumps v.2 06_24_24.pdf

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US

LBNF/DUNE-US

Liquid Argon Pumps Statement of Work

Document Number: EDMS 2902223 v.2

Liquid Argon Condenser Pumps 1 - Statement of Work - Rev. 1

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US Page ii

Document Approvals

Signatures Required Signature & Date Approved

Originator:

Zachery West, Cryogenic Engineer

05.15.24

Approver:

David Montanari, LBNF FDC Deputy Project Manager for Cryogenics

06.24.24

Approver:

Approver:

Approver:

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US Page iii

Revision History and Version Control

This version of the document may not be the current or approved revision. The current revision is maintained in the Engineering & Equipment Data Management Service (EDMS) where internal Project document approvals are managed. EDMS can be accessed through the web at https://edms.cern.ch. This document can be identified by the revision date as indicated in the Version Control Table below.

The currently approved version is always available at https://edms.cern.ch/document/2902223/1.

Author Revision Date Location EDMS Description of Changes

Zachery West 12/19/2023 EDMS 2902223 v.1 Original Document

Zachery West 06/24/2024 EDMS 2902223 v.2 Updated specifications https://edms.cern.ch/ https://edms.cern.ch/document/2902223/1

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US Page iv

Document Approvals .................................................................................................................................... ii

Revision History and Version Control .......................................................................................................... iii

List of Figures ................................................................................................................................................ v

List of Tables ................................................................................................................................................ vi

Acronyms and Abbreviations ...................................................................................................................... vii

1 Scope of Document ........................................................................................................................ 1-1

2 Applicable Codes and Standards .................................................................................................... 2-1

3 Project Introduction ....................................................................................................................... 3-3

4 Liquid Argon Pumps for Cryostat 1 & 2 General Description ........................................................ 4-6

5 Liquid Argon Condenser Pumps for Cryostat 1 & 2 Interface Requirements ................................ 5-8

6 Liquid Argon Circulation Pumps for Cryostat 1 & 2 Interface Requirements .............................. 6-10

7 Technical Requirements ............................................................................................................... 7-11

8 Modes of Operation for Condenser Pumps Units ........................................................................ 8-13

9 Modes of Operation for Circulation Pumps Units........................................................................ 9-14

10 Functional Requirements ........................................................................................................... 10-16

11 Operational Requirements of Condenser Pumps ...................................................................... 11-17

12 Operational Requirements of Circulation Pumps ...................................................................... 12-17

13 Mechanical Requirements of all pumps .................................................................................... 13-18

14 Specification of Supplied Equipment ......................................................................................... 14-19

15 Manufacturing, Installation, and Assembly Requirements ....................................................... 15-20

16 Shipping ...................................................................................................................................... 16-21

17 Examination, Inspection, and Test ............................................................................................. 17-22

18 Deliverables for the Kick-Off Meeting........................................................................................ 18-27

19 Deliverables for the Engineering Phase ..................................................................................... 19-27

20 Deliverables for the Manufacturing Phase ................................................................................ 20-29

21 Quality Assurance ...................................................................................................................... 21-30

22 Project Management ................................................................................................................. 22-31

23 Documentation Management.................................................................................................... 23-32

24 Required Documents Summary ................................................................................................. 24-33

References ............................................................................................................................................... 24-1

25 Appendix A – Design Parameters and Tables .............................................................................. 25-2

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US Page v

26 Appendix B – Ross Shaft Load Envelopes ..................................................................................... 26-6

List of Figures

Figure 3-1: LBNF/DUNE at Fermilab and SURF. ......................................................................................... 3-3 Figure 3-2: Underground Facility. .............................................................................................................. 3-4 Figure 3-3: Ross and Yates Shafts. ............................................................................................................. 3-4 Figure 3-4: The process flow diagram of for Cryostats 1 and 2.. ............................................................... 3-5 Figure 5-1: Liquid Argon Condenser Pump P&ID ....................................................................................... 5-9 Figure 7-1: Liquid Argon Circulation Pump P&ID ..................................................................................... 6-10 Figure 26-1: Ross Shaft Load Envelopes .................................................................................................. 26-6

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US Page vi

List of Tables

Table 8-1: The Environmental conditions in Caverns ............................................................................ 10-16 Table 13-1: Vacuum levels in insulation vacuum (vacuum jacket) ........................................................ 13-19 Table 13-2: Vacuum level Pressure Range ............................................................................................. 13-19 Table 17-1: The Minimum Control Point for Manufacturing and Installation of the Supply ................. 17-23 Table 25-1: Design Parameters ................................................................................................................ 25-2 Table 25-2: Upstream Piping Pressure Drop Limitations for LAr Circulation Pumps [2] ......................... 25-2 Table 25-3: Required Flow per Condenser [2] ......................................................................................... 25-2 Table 25-4: Required Flow Rate per Mode of Operation for Circulation Pumps..................................... 25-2 Table 25-5: Required Flow Rate per Mode of Operation for Condenser Pumps ..................................... 25-3 Table 25-6: Materials for Other Components of the Supply ................................................................... 25-3 Table 25-7: Maximum Acceptable Helium Leak Rates............................................................................. 25-4 Table 25-8: LAr Circulation Pumps Operating Point ................................................................................ 25-4

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US Page vii

Acronyms and Abbreviations

The following terms define provisions within this document. “May” indicates a condition is neither required nor prohibited. “Should” indicates a recommended provision as good practice but is not a requirement. “Shall” indicates a requirement.

Engineering and Construction Codes will be referred to as Codes to refer collectively to various safety standards the scope shall comply with. This will be reflective of both American and International Codes, depending on the applicable Code used by the Subcontractor’s governing body.

Acronym Definition

AACEI AACE International (Formerly the Association for the Advancement of Cost Engineering)

ACI American Concrete Institute

ANSI American National Standards Institute

APA Anode Plane Assembly

API American Petroleum Institute

ASCE American Society of Civil Engineers

ASME American Society of Mechanical Engineers

ASTM American Society for Testing and Materials

AUP Authorization for Use and Possession

BPVC Boiler and Pressure Vessel Code (ASME)

CAD Computer-Aided Design

CGA Compressed Gas Association

CFR Code of Federal Regulation

CUC Central Utility Cavern

DOE Department of Energy

DUNE Deep Underground Neutrino Experiment

DXF Data Exchange Format

EJMA Expansion Joint Manufacturers Association

EN European Norm

ESH or ES&H Environment Safety and Health

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US Page viii

Acronym Definition

EVMS Earn Value Management System

FAT Factory Acceptance Tests

FD-1 Far Detector 1

FD-2 Far Detector 2

FDC Far Detectors & Cryogenics

FDR Final Design Review

FEA Finite Element Analysis

FEED Front-End Engineering Design

FMEA Failure Mode and Effect Analysis

FRA Fermi Research Alliance LLC

FSCF Far Site Conventional Facilities

FSF Far Site Facilities

GAr Gaseous Argon

GAN Gaseous Nitrogen

GC General Contractor

GN2 Gaseous Nitrogen

HAZOP Hazard and Operability Analysis

HP Hold Point

IC Installation Coordinator

IEC International Electric Code

IEEE Institute of Electrical and Electronics Engineers

IKC In-Kind Contribution

IRR Installation Readiness Review

ISA International Society of Automation

ISO International Standards Organization

LAr Liquid Argon

LBNF Long-Baseline Neutrino Facility

LBNF/DUNE-US Long-Baseline Neutrino Facility/Deep Underground Neutrino Experiment-United States – Refers to the US DOE line-item project

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US Page ix

Acronym Definition

LFL Lower Flammability Limit

LIN Liquid Nitrogen

LN2 Liquid Nitrogen

MIP Manufacturing and Inspection Plan

MLI Multi-Layer Insulation

MS Microsoft

MTBF Mean Time Between Failures

MTTF Mean Time to Failure

MTTR Mean Time to Repair

NB National Board of Boiler and Pressure Vessels Inspectors

NEC National Electric Code

NEMA National Electrical Manufacturers Association

NET No-Earlier-Than

NFPA National Fire Protection Association

NIST National Institute for Standards and Technology

NLT No-Later-Than

NP Notification Point

NTP Notice To Proceed

NWD Navisworks Document

OEM Original Equipment Manufacturer

OSHA Occupational Safety and Health Administration

PEM Proton Exchange Membrane (in the H2 generator)

PDF Portable Data Format

PDR Preliminary Design Review

PED Pressure Equipment Directive

PFD Process Flow Diagram

PLC Programmable Logic Controller

PRR Production Readiness Review

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US Page x

Acronym Definition

P&ID Piping and Instrumentation Diagram

QA Quality Assurance

QC Quality Control

QM Quality Manual

RFP Request for Proposals

SCADA Supervisory Control and Data Acquisition

SCFH Standard Cubic Feet Per Hour

SCR Semiconductor Controller Rectifier

SDSTA South Dakota Science and Technology Authority

SLD Single Line Diagram

SLIN Subcontract Line Item Number

SOW Statement of Work

SPVD Simple Pressure Vessel Directive

SS Stainless Steel

STEP The standard for the Exchange of Product Data

SURF Sanford Underground Research Facility

T&C Terms and Conditions

UL Underwriters Laboratories

V&I Valves and Instruments

VIP Vacuum Insulated Pipe

VJ Vacuum-Jacketed

Statement of Work Scope of Document

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 2-1

1 Scope of Document This document describes the requirements for the Long-Baseline Neutrino Facility (LBNF) Liquid Argon Pumps (Circulation and Condenser) for Cryostats 1 and 2.

Exceptions to these specifications shall not be permitted, except by written approval from Fermilab Research Alliance (FRA).

2 Applicable Codes and Standards Below are codes, standards, and directives to which the Subcontractor shall adhere, and which shall be applied to the engineering, manufacturing, assembly, and testing of the system subject to this Statement of Work (SOW). All the codes, standards, and directives are intended to be used in their latest published edition at the time of engineering, and include, but are not limited to:

• ACI 318 Building Code Requirements for Structural Concrete and Commentary

• ALPEMA standards

• ANSI ASC A14.3 Safety Requirements for Fixed Ladders

• ANSI/ASSE A1264.1 Safety Requirements for Workplace Surfaces

• ANSI/ISA-5.1 Instrumentation Symbols and Identification

• ANSI/ISA-75.01.01 Flow Equations for Sizing Control Valves

• ANSI/NEMA IM 60000-2021 Industrial Laminated Thermosetting Products

• API 520 Sizing, Selection, and Installation of Pressure-reliving Devices

• API 521 Pressure-relieving and De-pressurizing Systems

• API 526 Flanged Steel Pressure-relief Valves

• API RP 615 Valve Selection Guide

• ASCE/SEI 7 Minimum Design Loads for Buildings & Other Structures

• ASME B30.20 Below-the-Hook Lifting Devices

• ASME B30.26 Rigging Hardware

• ASME B30.9 Slings

• ASME B31.3 Process Piping

• ASME B31E Standard for the Seismic Design and Retrofit of Above-Ground Piping Systems

• ASME BPVC Boiler and Pressure Vessel Code

• ASME BTH-1 Design of Below-the-Hook Lifting Devices

• ASME Y14.100 Engineering Drawing Practices

• ASME Y14.5M Dimensioning Tolerance Code

• ASTM E2734/E2734M Standard Specification for Dimensions of Knife-Edge Flanges

• ASTM A380 Standard Practice for Cleaning, Descaling, and Passivation of Stainless-Steel Parts, Equipment, and Systems

• ASTM E493 Standard Test Methods for Leaks Using the Mass Spectrometer Leak Detector in the Inside-Out Testing Mode

Statement of Work Applicable Codes and Standards

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 2-2

• ASTM E498 Standard Test Methods for Leaks Using the Mass Spectrometer Leak Detector or Residual Gas Analyzer in the Tracer Probe Mode

• ASTM E499 Standard Test Methods for Leaks Using the Mass Spectrometer Leak Detector in the Detector Probe Mode

• CGA S-1.3 Pressure Relief Standards

• CGA G-4.1 Cleaning Equipment for Oxygen Service, Seventh Edition

• EN 12300 Cryogenic vessels. Cleanliness for cryogenic service

• EN 60534-2 Industrial Process Control Valves

• EN 61508 Functional safety of electrical/electronic/ programmable electronic safety-related systems

• EJMA standards

• IEC 61511 Functional safety - Safety instrumented systems for the process industry sector

• IEEE 315 Graphics Symbols for Electrical and Electronics Diagrams (Including Reference

Designation Letters)

• ISA-75.01.01 Industrial-Process Control Valves

• ISA 84.00.01 Functional Safety: Safety Instrumented Systems for the Process Industry Sector

• ISA-S20 Specification Forms for Process Measurement and Control Instruments, Primary

Elements, and Control Valves

• ISA-S5.4 Instrument Loop Diagrams

• ISO 23208 Cryogenic vessels - Cleanliness for cryogenic service

• ISO 28921-1 Industrial valves. Isolating valves for low-temperature applications - Design, manufacturing, and production testing

• ISO 3669 Vacuum technology. Dimensions of knife-edge flanges

• NFPA 70E National Electric Code (NEC)

• OSHA Standard 1910 General Industry Regulation

• OSHA Standard 1926 Safety and Health Regulations for Construction

• UL 471 Commercial Refrigerators and Freezers

• UL 61010-2-011 Safety Requirements for Electrical Equipment for Measurement, Control, and

Laboratory Use - Part 2-011: Particular Requirements for Refrigerating Equipment

• UL 508A Industrial Control Panels

The Subcontractor may propose other recognized standards. Their application is subject to prior written approval by Fermi Research Alliance (FRA). In such cases, the Subcontractor shall submit all the necessary documentation for approval to FRA. FRA, at its discretion, reserves the right to veto the use of certain codes or standards, in part or whole. In no event will FRA be responsible for schedule delays or cost increases associated with the review and evaluation of alternative codes or standards proposed by the Subcontractor.

Statement of Work Project Introduction

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 3-3

The International Electric Code (IEC) may be used if supporting documentation is provided to prove an equivalent or greater level of safety to that afforded by NFPA 70E NEC. The use of IEC shall be approved by FRA.

3 Project Introduction

LBNF (http://lbnf-dune.fnal.gov/) will provide the infrastructure necessary to support the massive neutrino detectors located deep underground at the Sanford Underground Research Facility (SURF) in Lead, South Dakota (SD). The Deep Underground Neutrino Experiment (DUNE) will employ four (4) such detectors, housed in cryostats requiring almost 70,000 tons of liquid argon (LAr), about 17,400 tons for each cryostat. DUNE (http://www.dunescience.org/) is expected to achieve transformative discoveries, making definitive determinations of neutrino properties, examining the dynamics of supernovae that produced the heavy elements necessary for life, and probing the possibility of proton decay. Figure 3-1 shows an overview of LBNF/DUNE.

Figure 3-1: LBNF/DUNE at Fermilab and SURF.

The cryogenics infrastructure for LBNF is split between two locations:

• aboveground at the Receiving Facility

• belowground within the Detector Caverns and the Central Utility Cavern (CUC), shown in Figure

3-2.

The two locations are separated vertically by nearly one mile.

http://lbnf.fnal.gov/ http://www.dunescience.org/

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 3-4

Figure 3-2: Underground Facility.

They are joined by the Ross Shaft, through which all underground equipment must pass, shown in Figure 3-3. The Ross Shaft Cage Dimensions are shown in Appendix B.

Figure 3-3: Ross and Yates Shafts.

The Liquid Argon Pumps (Circulation and Condenser) for Cryostat 1 & 2 shall be housed entirely underground, within the North and South Detector Cavern 4850 feet (1478 meters) below the surface.

Figure 3-4 shows the Process Flow Diagram (PFD) for the cryogenic systems at LBNF at mezzanine level.

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 3-5

Figure 3-4: The process flow diagram of for Cryostats 1 and 2. The Condenser Pumps are circled in red. The

Circulation Pumps are circled in orange.

Statement of Work Liquid Argon Pumps for Cryostat 1 & 2 General Description

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 4-6

4 Liquid Argon Pumps for Cryostat 1 & 2 General Description The Liquid Argon Condenser Pumps for the Cryostats 1 & 2 shall perform the injection of liquid argon, collected in the condenser vessel’s valve box (not part of Supply), into the process piping to the purification equipment via the Argon Separator (not part of Supply).

The successful bidder (hereafter referred to as the “Subcontractor”) shall construct, engineer, manufacture, test, pack, deliver, and provide guidance with documentation for the installation and testing of the Liquid Argon Condenser Pump units.

The Liquid Argon Condenser Pumps for Cryostat 1 (hereafter referred to as the “Supply”) comprises of two (2) liquid argon condenser pumps units and one (1) working spare each equipped with a motor and a magnetic coupling separating the argon volume from the electrical motor situated at room temperature.

The Liquid Argon Condenser Pumps for Cryostat 2 (part of the “Supply”) also comprises of two (2) liquid argon condenser pumps units and one (1) working spare each equipped with a motor and a magnetic coupling separating the argon volume from the electrical motor situated at room temperature.

The Liquid Argon Main Circulation Pumps for the Cryostats 1 & 2 shall perform useful work on the fluid by transferring it from a low-pressure suction to a high-pressure discharge, pushing it downstream through the system resistance. These resistances include friction and internal losses in valves, piping, etc.

The Liquid Argon Main Circulation Pumps System for Cryostat 1 (hereafter referred to as the “Supply”) comprises of two (2) liquid argon pumps units and one (1) working spare each equipped with a motor and a magnetic coupling separating the argon volume from the electrical motor situated at room temperature, three (3) Variable Frequency Drives (VFDs) to power the three (3) electrical motors.

The Liquid Argon Main Circulation Pumps System for Cryostat 2 (hereafter referred to as the “Supply”) comprises of two (2) liquid argon pumps units and one (1) working spare each equipped with a motor and a magnetic coupling separating the argon volume from the electrical motor situated at room temperature, three (3) Variable Frequency Drives (VFDs) to power the three (3) electrical motors.

Statement of Work Liquid Argon Pumps for Cryostat 1 & 2 General Description

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 4-7

Additional requirements for the Supply are outlined below:

4.1 The Subcontractor shall furnish all facilities, equipment, special tooling, consumables, materials, and labor for the work described in this SOW, except where explicitly excluded in this and related documentation.

4.2 The Subcontractor shall provide all materials and labor for the construction, design, analysis, manufacturing, validation, delivery, and instruction for the installation and testing of the Supply.

4.3 The Subcontractor shall provide detailed, signed, certified shop drawings that meet the requirements of codes listed in Section 2.

4.4 All engineering analyses, design models, and manufacturing drawings shall be subject to approval by FRA.

4.5 The Subcontractor shall furnish two overhaul kits (pending the bearing selection) per pump.

4.6 The Subcontractor shall conduct all tests, inspections, examinations, material tests, and non-destructive examinations required by the applicable codes listed in Section 2 and perform any resulting repairs or replacements before the delivery. Reports to be forwarded to FRA for approval prior to shipping.

4.7 The Subcontractor shall furnish all parts deemed necessary during the installation process. Vendor to supply a maintenance service agreement to aid with overhauls and installation questions/assistance in support of the DUNE program.

4.8 FRA (or its designated representative agent) reserves the right to witness and inspect any part during the manufacturing, assembly, and testing at the Subcontractor or Subcontractor’s suppliers / sub-subcontractors’ site with as little as one day’s notice.

4.9 The Subcontractor shall not be responsible for connecting their equipment to the provided utilities (e.g., power), nor shall the Subcontractor be responsible for fixing the equipment in place; such activities shall fall under the purview of FRA.

Statement of Work Liquid Argon Condenser Pumps for Cryostat 1 & 2 Interface Requirements

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 5-8

5 Liquid Argon Condenser Pumps for Cryostat 1 & 2 Interface Requirements

The Supply shall be located inside spaces allocated in the North Detector Cavern envelope. Two (2) liquid argon condenser pumps divided per set of six (6) condensers with one (1) working spare. See Figure 5-1 below.

The Supply shall be located inside spaces allocated in the South Detector Cavern envelope. Two (2) liquid argon condenser pumps divided per set of six (6) condensers with one (1) working spare. See Figure 5-1 below.

The proposed configuration is highlighted in Figure 5-1 below. The yellow highlighted section is the pumps themselves that show the 2 condenser pumps that come off each set of six (6) condensers. One of these pumps is a working spare. The green highlighted sections are the upstream piping that is made of 6” vacuum jacketed piping coming from the condensers. The blue highlighted sections are the downstream piping that is made of 3” vacuum jacketed manifold that is utilized during the cooldown of the cryostat where the liquid argon has been cooled and cleaned coming out of the condenser. The pink highlighted section is the 4” vacuum jacketed piping that is utilized during LAr Purification where the gaseous argon boiloff is being sent back to condenser to be re-liquiefied. The flow from this system merges with the flow from out of the circulation system common manifold. The combined flow goes to the CUC. Vendor to work with proposed P&ID shown in Figure 5-1 and other technical / operational requirements in future sections to propose number and configuration of pumps needed.

Statement of Work Liquid Argon Condenser Pumps for Cryostat 1 & 2 Interface Requirements

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 5-9

Figure 5-1: Liquid Argon Condenser Pump P&ID (Draft, Subject to Change)

Statement of Work Liquid Argon Circulation Pumps for Cryostat 1 & 2 Interface Requirements

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 6-10

6 Liquid Argon Circulation Pumps for Cryostat 1 & 2 Interface Requirements

The Supply shall be located inside spaces allocated in the North Detector Cavern envelope. Two (2) pumps divided per cryostat with one (1) working spare. See Figure 6-1 below.

The Supply shall be located inside spaces allocated in the South Detector Cavern envelope. Two (2) pumps divided per cryostat with one (1) working spare. See Figure 6-1 below.

The proposed configuration is highlighted in Figure 6-1 below. The red highlighted section is the pumps themselves that show the circulation pumps that come off the cryostat. One of these pumps is a working spare. The yellow highlighted sections are the upstream piping that is made of 4” vacuum jacketed piping.

The green highlighted sections are the downstream piping that is made of 4” vacuum jacketed piping inside the valve box. The blue highlighted section is the 6” vacuum jacketed manifold that connects all three of the downstream piping streams. This outlet will also merge with the common outlet coming out of the condenser system. The combined flow goes to the CUC. The orange line is a bypass line that routes back to the condensers for re-circulation. Vendor to work with proposed P&ID shown in Figure 6-1 and other technical / operational requirements in future sections to propose number and configuration of pumps needed.

Figure 6-1: Liquid Argon Circulation Pump P&ID (Draft, Subject to Change)

Statement of Work Technical Requirements

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 7-11

7 Technical Requirements

7.1 Liquid Argon Condenser Pump Unit

7.1.1 Each liquid argon condenser pumps shall be designed for internal vacuum and for a pressure of 10 bar at any temperature ranging from about 310 K to about 87 K (for the cool-down and warm-up processes).

7.1.2 The liquid argon condenser pumps shall each have an adiabatic efficiency 0.45 or higher.

7.1.3 Vendor to specify if these are partial or full emission pumps.

7.1.4 The liquid argon condenser pumps shall be designed to fulfill the code requirements listed in Section 2.

7.1.5 The Subcontractor shall ensure that all the necessary calculations are performed to verify that the overall stresses remain within acceptable values as specified in the chosen applicable standards.

7.1.6 Vibrations and other constraints at the interfaces shall be clearly indicated by the Subcontractor.

7.1.7 Only dry, self-lubricated bearing technology (for example Teflon molybdenum desulphated cages with stainless steel balls and races) shall be applied for the bearings in contact with gaseous or liquid argon.

7.1.8 Leak rate from atmosphere and from the vacuum enclosure to the argon space shall be smaller that 7.5x10-10 Torr/L×s (10-9 mbar/L×s).

7.1.9 The selected vendor shall manufacture six (6) identical pump units.

7.2 Liquid Argon Circulation Pump Unit

7.2.1 The liquid argon pumps shall be designed for internal vacuum and for a pressure of 10 bar and shall be suitable for handling argon flows at any temperature ranging from about 310 K to about 87 K (for the cool-down and warm-up processes).

7.2.2 The liquid argon pumps shall each have an adiabatic efficiency higher than 0.5.

7.2.3 Vendor to specify if these are partial or full emission pumps.

7.2.4 The liquid argon pumps shall be designed to fulfil the code requirements listed in Section 2.

7.2.5 The Subcontractor shall ensure that all the necessary calculations are performed to verify that the overall stresses remain within acceptable values as specified in the chosen applicable standards.

7.2.6 Vibrations and other constraints at the interfaces shall be clearly indicated by the Subcontractor.

7.2.7 Only dry, self-lubricated bearing technology (for example Teflon molybdenum desulphated cages with stainless steel balls and races) shall be applied for the bearings in contact with gaseous or liquid argon.

Statement of Work Technical Requirements

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 7-12

7.2.8 Leak rate from atmosphere and from the vacuum enclosure to the argon space shall be smaller that 7.5x10-10 Torr/L×s (10-9 mbar/L×s).

7.2.9 The selected vendor shall manufacture six (6) identical pump units.

7.2.10 The six (6) VFDs should be provided by Subcontractor.

7.2.11 The six (6) electrical motors for the VFDs shall be provided by Subcontractor.

7.2.12 The electrical power cabling between the liquid argon pumps and their corresponding VFD as well as the electrical power cabling between each of the VFDs and the electrical power network shall be provided by Subcontractor.

Statement of Work Modes of Operation for Condenser Pumps Units

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 8-13

8 Modes of Operation for Condenser Pumps Units The Condenser Pumps units defined in this Functional Requirements document will be used for the following modes of operation:

1. Cryostat Fill

2. Normal Operations

3. Bearing Replacement

4. Maintenance

The proposed configuration uses 2 pumps in modular fashion. Vendor should specify performance of pumps running in parallel. The functional parameters should dictate the optimal number of pumps and their characteristics as long as requirements are met. Full redundancy is not required. One spare condenser pump per cryostat is sufficient.

8.1 Cryostat Fill

Once the system is clean and cold, the liquid argon is condensed in the Argon Condenser. The clean and cold liquid argon leaving the condenser valve box is sent to the condenser pump and sent to the cryostat for cooldown and fill operations. Vendor to specify number of pumps required in parallel to start the pump stepper based on the pump performance curve. Vendor to specify optimal pump rotational speed to meet the mass flow requirement specified in Table 25-5.

8.2 Normal Operations

Liquid argon leaves the condenser from the bottom and into the pump where it circulates liquid argon back to the condenser through the Desuperheater. The vendor shall indicate proper configuration to decrease the differential pressure across the pumps to keep the required mass flow per Table 25-5.

Vendor to specify optimal pump rotational speed to also meet mass flow requirement specified in Table 25-5.

8.3 Bearing Replacement

Based on liquid argon pump manuals, each pump needs to replace bearings approximately each 6000 working hours. Supply shall be able to replace bearings on each pump without interruption of circulation process. Vendor to supply overhaul kits and spare impellers. Two overhaul kits per pump are required.

8.4 Maintenance

Each pump units shall be capable of a controlled warm-up/cool-down for maintenance without interfering with the pump capacity. Any of the pump units shall be capable of being taken out of service for maintenance while any combination of the other units remains in operation. One spare pump per cryostat required.

Statement of Work Modes of Operation for Circulation Pumps Units

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 9-14

9 Modes of Operation for Circulation Pumps Units The Circulation Pumps units defined in this Functional Requirements document will be used for the following modes of operation:

1. Initial purge and cooldown.

2. Cryostat Fill Process

3. Normal operation.

4. Bearings replacement.

5. Maintenance

6. Purge and standby mode.

The proposed configuration uses 2 pumps in modular fashion. Vendor should specify performance of pumps running in parallel. The functional parameters should dictate the optimal number of pumps and their characteristics as long as requirements are met. Full redundancy is not required. One spare pump per cryostat is sufficient.

9.1 Supply Initial Purge and Cooldown

The Supply shall be cleaned up from air in the system, using cylinder argon gas for pump and backfilled of process line and pump space. After using pure argon from cryostat, purge the process lines and vent it, slowly cooldown the system.

9.2 Cryostat Fill

Once the system is clean and cold, vendor to specify number of pumps required in parallel to start the pump stepper based on the pump performance curve. Vendor to specify optimal pump rotational speed to meet the mass flow requirement specified in Table 25-4.

9.3 Normal Operations

During Normal operations, the pump configuration should have ability to decrease from 2 pumps to 1 pump by slowing the speed which shall decrease the differential pressure across the pump to keep the required mass flow per Table 25-4. Vendor to specify optimal pump rotational speed to also meet mass flow requirement specified in Table 25-4.

9.4 Bearing Replacement

Based on liquid argon pump manuals, each pump needs to replace bearings approximately each 6000 working hours. Supply shall be able to replace bearings on each pump without interruption of circulation process. Vendor to supply overhaul kits and spare impellers. Two overhaul kits per pump are required.

Statement of Work Modes of Operation for Circulation Pumps Units

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 9-15

9.5 Maintenance

Any of the pump units shall be capable of being taken out of service for maintenance while the other pump remains in operation. The pump configuration shall be divided into two pumps and shall work under the same conditions. One spare pump required per cryostat.

9.6 Supply purge and standby mode

After pumps bearing replacement all process lines shall be pulled in vacuum and cleaned with argon gas from cylinder first and backfilled from working pump common manifold. System shall be ready to operate.

Statement of Work Functional Requirements

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 10-16

10 Functional Requirements

10.1. The Supply shall be designed for an operational lifetime of 30 years.

10.2. The Subcontractor shall inform FRA of consumable and utility needs (electricity, pneumatic, concrete floor loading, etc.) based on the engineering analysis.

10.3. Facility electrical power to the Supply equipment at the 4850 level is to be provided by an FRA electric feed. FRA will provide the Supply with fused disconnect switches, circuit breakers, GFCI outlets, and power cables.

10.4. The Subcontractor shall provide stress, thermal, flow, pressure drop, and regeneration cycle analyses for the Supply to verify the performance requirements.

10.5. The Subcontractor shall provide the complete technical documentation for the Supply, including individual items and elements.

10.6. The Subcontractor shall perform acceptance testing for the Supply as specified in section 12 and resulting repairs or replacements.

10.7. Upon successful completion of Final Acceptance Tests and receipt of all deliverables, a three (3) year warranty against defects in material and workmanship shall commence.

10.8. Lifting eyes and/or other means of lifting shall be included in the design of the equipment and packaging.

10.9. The Supply shall be designed for indoor use inside the Northern and Southern Cavern.

Temperature, humidity, and other environmental factors are shown in Table 8-1.

Table 10-1: The Environmental conditions in Caverns

Parameters Units Northern / Southern Cavern

Indoor Temperature (Min/Max) °F (K) °C 67 (292.6) 19.4 / 85 (302.6) 29.4

Atmospheric Pressure psi(a)/ bar(a) 14.6 / 1.007

Relative Humidity (Min/Max) % 15/85

Dew Point (summer/winter) °F (K) °C The maximum dew point of 48 (282)

Statement of Work Operational Requirements of Condenser Pumps

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 12-17

11 Operational Requirements of Condenser Pumps

11.1 The liquid argon condenser pumps shall be mounted in vacuum-insulated valve boxes (not part of

Supply).

11.2 The bearings shall be able to replace as listed in manufacturer manuals.

11.3 Any of the two pump units shall be capable of being taken out of service for maintenance while any combination of the other units remains in operation.

11.4 Each pump unit in the Supply, shall be capable of a controlled warm-up/cool-down for maintenance without interfering with the pump capacity and functioning of any online filters, through an operator-initiated automated sequence of steps (PLC and PLC programming provided by FRA).

11.5 The Subcontractor shall include in the documentation file the original documentation provided by the supplier of each instrument and the calibration data of all instrumentation.

11.6 All Subcontractors designed electrical equipment shall conform to the electrical design standards for electronics listed in Section 2. Commercially available equipment assemblies procured (not designed) by the Subcontractor shall be reviewed and approved by FRA.

11.7 All electrical connections shall be documented in an electrical drawing/schematic, with symbols and reference designators conforming to electrical codes listed in Section 2. Drawings/schematics shall include a pinout of all connectors interfacing with the main cryogenics controls system.

11.8 The six electrical motors shall be powered three-phase, 60 Hz, and 230/460 VAC power provided by FRA.

12 Operational Requirements of Circulation Pumps

12.1 The liquid argon pumps shall be mounted in vacuum-insulated valve boxes (not part of Supply).

12.2 The bearings shall be able to replace as listed in manufacturer manuals.

12.3 Any of the two pump units shall be capable of being taken out of service for maintenance while any combination of the other units remains in operation.

12.4 The Supply shall provide the instrumentation necessary to verify the health and performance of each unit within the system.

12.5 Each pump unit in the Supply, shall be capable of a controlled warm-up/cool-down for maintenance without interfering with the pump capacity and functioning of any online filters, through an operator-initiated automated sequence of steps (PLC and PLC programming provided by FRA).

Statement of Work Mechanical Requirements of all pumps

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 13-18

12.6 The Subcontractor shall include in the documentation file the original documentation provided by the supplier of each instrument and the calibration data of all instrumentation.

12.7 All Subcontractors designed electrical equipment shall conform to the electrical design standards for electronics listed in Section 2. Commercially available equipment assemblies procured (not designed) by the Subcontractor shall be reviewed and approved by FRA.

12.8 All electrical connections shall be documented in an electrical drawing/schematic, with symbols and reference designators conforming to electrical codes listed in Section 2. Drawings/schematics shall include a pinout of all connectors interfacing with the main cryogenics controls system.

12.9 The six (6) VFDs to power the six electrical motors shall be powered three-phase 480V – 60 Hz, power provided by FRA.

13 Mechanical Requirements of all pumps

13.1 General Mechanical Requirements

13.1.1 Design and placement of all valves and instrumentation or other external components shall allow for ease of operation, inspection, maintenance, and troubleshooting. Features shall be included for the control of hazardous energies (i.e., electrical, mechanical, hydraulic, pneumatic, chemical, and thermal) under Lockout/Tagout (LOTO) for safety inspections, maintenance, and troubleshooting.

13.1.2 All recommended LOTO schemes shall be included in maintenance manuals to be provided upon delivery of the Supply. All LOTO schemes shall be proposed to the FRA and are subject to FRA written approval.

13.1.3 When gaskets are required, metal gaskets shall be used whenever possible. The Subcontractor shall evaluate the location of gaskets to ensure the chosen gasket material may withstand the temperatures at that location. All gaskets are subject to FRA written approval.

13.1.4 All wire/cable shall be of type low smoke zero halogens (LSZH).

Statement of Work Specification of Supplied Equipment

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 14-19

Table 13-1: Vacuum levels in insulation vacuum (vacuum jacket)

Description Vacuum level

Pa mBar

At room temperature with active pumping

(After 100 hr of pumping) < 5⋅10-1 < 5⋅10-3

At nominal temperature without active pumping < 5⋅10-2 < 5⋅10-4

Table 13-2: Vacuum level Pressure Range

Pressure Minimum Pressure Maximum Pressure psia bara psia bara

Internal 0 0 21.8 1.5

External Atmospheric Atmospheric Atmospheric Atmospheric

14 Specification of Supplied Equipment

14.1 Materials

14.1.1 Materials known to become brittle at cryogenic temperatures shall not be used for components that may become cold under any circumstances whether normal operations or accidental.

14.1.2 All materials used in the system shall be new and designed for the operating parameters.

14.1.3 Any materials used in pressure-containing piping shall conform to the piping code for the appropriate fluid service category.

14.1.4 Any flanges and blanks shall conform to the piping code requirements for the appropriate fluid service category.

14.1.5 Material test reports shall be provided for all components.

14.1.6 The Subcontractor shall identify any plastic or polymer-based components and any low thermal conductivity materials planned to use. They are subject to FRA approval.

14.1.7 The materials for other components of the Supply are shown in Table 22-4 in Appendix A.

Statement of Work Manufacturing, Installation, and Assembly Requirements

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 15-20

15 Manufacturing, Installation, and Assembly Requirements

15.1 Manufacturing

The Subcontractor shall provide a manufacturing plan outlining the steps and details, which will be subject to FRA approval at the time of the Production Readiness Review (PRR) or earlier.

15.2 Labeling

15.2.1 A nameplate displaying the overall weight of each Supply shall be mounted on its body.

15.2.2 The approximate center of gravity of the Supply shall be displayed for lifting and rigging purposes.

15.3 Welding

15.3.1 All welding joint preparation and welding techniques shall be performed by the applicable codes.

15.3.2 The Subcontractor shall provide the Procedure Qualification Record (PQR) for each Welding Procedure Specification (WPS) as required by the applicable codes prior to fabrication.

15.3.3 The Subcontractor shall provide the Welder Performance Qualifications (WPQs) for each welder as required by the applicable codes prior to final shipment.

15.3.4 The Subcontractor shall provide weld maps that identify each weld and the name of the welder performing the weld.

15.3.5 All welding performed on the cryogenic process piping circuits shall be done by the Gas Tungsten Arc Weld (GTAW) process, using welding quality argon gas for the inert shield.

15.3.6 All welds shall be internally purged with welding-quality argon gas during the time of welding and post-welding treatment.

15.3.7 Welds that show evidence of a lack of purge shall not be accepted.

15.3.8 All welding shall be performed in such a manner that the welding surface is smooth and free of irregularities. No visible metal chips or foreign material may be detectable inside any component. All external surfaces in the weld area shall be cleaned of heat tint, slag, and other deposits. No mechanical process shall be used to achieve a smooth appearance.

15.3.9 No production welding shall be performed until all WPS, PQR, and WPQ documents have been qualified by the applicable codes.

15.3.10 If possible, longitudinal welds shall be avoided in tubes and pipes.

Statement of Work Shipping

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 16-21

15.4 Cleaning

15.4.1 A cleanliness Quality Assurance plan shall be submitted by the Subcontractor outlining measures taken by the Subcontractor to ensure cleanliness during manufacturing. This document is subject to FRA approval.

15.4.2 Each component and subassembly shall be thoroughly cleaned at every stage of all scales, spatter, flux, foreign materials, etc. All scales, flux, lubricants, or any foreign materials shall be cleaned per an approved Subcontractor Cleanliness Quality Assurance Plan.

15.4.3 Cleaning agents shall be suitable for the materials of construction and shall be neutralized if necessary.

15.4.4 Weld spatter shall be removed by wire brushing using stainless steel brushes.

15.4.5 Each assembly shall be cleaned such that all surfaces are free of grease, flux, moisture, dirt, and other foreign materials by vapor degreasing or suitable wash. Surfaces shall be visibly inspected and wiped down with a white cloth. To be considered free of contamination, no discoloration shall appear on the white cloth.

15.4.6 After cleaning, each section shall be blown dry with clean dry air until no visual moisture remains.

15.4.7 Oxygen service cleaning and inspection shall follow CGA G-4.1 or equivalent that is subject to FRA written approval.

15.4.8 Only deionized water shall be used should water be required for cleaning purposes.

15.5 Installation

The subcontractor shall provide installation and repair manuals / procedures as well as all documentation for the installation process.

16 Shipping

16.1 The Supply sub-components shall be carefully packed for transport and their value shall be covered by transport insurance. The Subcontractor shall take all appropriate precautions necessary to avoid damage to equipment or interference from any kind of other FRA contractors or users.

16.2 Accelerometers with logging capabilities shall be mounted before shipment and inspected after each transport and handling up to the final positioning of each item in the CUC and detector cavern. The peak value shall not exceed 4 g.

16.3 All openings shall be sealed against moisture, dirt, or air penetration with appropriate plastic caps or blind flanges.

Statement of Work Examination, Inspection, and Test

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 17-22

16.4 All items shall be created or boxed to be readily handled with a forklift truck and shall have suitable lifting attachments for the use of an overhead crane.

16.5 Design of the crate and lifting fixtures (if used) shall respect the weight and size limitations listed in Appendix B.

16.6 Each crate shall be marked indicating contents, contract number, and gross weight. In addition, the following features shall be incorporated into the design of each crate:

i. The full enclosure on all sides.

ii. Sufficient interior restraint to prevent the components from shifting within each crate.

iii. Appropriate and marked exterior features to allow tie-down during transport and lifting using both a crane and a forklift.

iv. Protection from prolonged exposure to the weather without corrosion or other damage to their content.

v. Clear labels in the English language and point of origin indicating the presence of fragile contents.

vi. Extra interior space and restraints for miscellaneous hardware (mounting jacks, etc.).

vii. Any welds used in the construction of the shipping crate shall conform to welding codes.

16.7 The following inspections shall be performed upon arrival:

i. Transport acceleration according to section 14.10.

ii. FRA incoming inspection (at SURF) according to section 14.12.

17 Examination, Inspection, and Test

17.1 General

17.1.1 The Supply shall be shop tested in the presence of the FRA or its representatives to ensure that operational performance, Code, and other safety requirements are met. A shop test report for the Supply shall be provided by the Subcontractor to FRA.