J-4 Statement_of_Work_LAr_Circulation VD-HD 07-29-25 Final.pdf

LBNF/DUNE-US

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

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

LBNF/DUNE-US

Liquid Argon Circulation VD and HD Statement of Work

Document Number: EDMS 3200496 v.1

Liquid Argon Circulation VD and HD Statement of Work

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

Document Approvals

Signatures Required Signature & Date Approved

Originator: Zachery West, Cryogenics Engineer

Checker: Mark Adamowski, Lead Cryogenics Systems Engineer

Approver: David Montanari, LBNF/DUNE-US FDC Project Manager for Cryogenics

Approver: Jolie Macier, LBNF/DUNE-US FDC Project Manager

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 LBNF/DUNE Document Management System (DocDB) or the Engineering & Equipment Data Management Service (EDMS) where internal Project document approvals are managed. DocDB can be accessed through the web by authorized users (https://docs.dunescience.org/), and 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 current approved version is always available in DocDB or EDMS.

Author Revision Date Location (EDMS) Description of Changes

Zachery West 07/29/2025 3200496 v.1 Initial release https://docs.dunescience.org/_ https://edms.cern.ch/

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

Table of Contents

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

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

List of Figures .............................................................................................................................................. vii

List of Tables .............................................................................................................................................. viii

Acronyms and Abbreviations ....................................................................................................................... ix

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

2 Terms Used in the Document ............................................................................................................ 2-2

3 Applicable Codes and Standards. ....................................................................................................... 3-3

4 Project Introduction ........................................................................................................................... 4-5

5 Scope of the Supply............................................................................................................................ 5-6

5.1 Scope of the Supply Description ............................................................................................... 5-6

5.2 Scope of the Supply Structure .................................................................................................. 5-6

6 General Description ........................................................................................................................... 6-7

7 Engineering Requirements ............................................................................................................... 7-10

8 Functional Requirements ................................................................................................................. 8-13

9 Interface Requirements ................................................................................................................... 9-15

10 Mechanical Requirements ......................................................................................................... 10-20

10.1 General Mechanical Requirements ...................................................................................... 10-20

10.2 Coriolis Flow Meter .............................................................................................................. 10-20

10.3 Hose, Bellows, etc. ................................................................................................................ 10-20

10.4 Internal supports .................................................................................................................. 10-20

10.5 Thermal Insulation ................................................................................................................ 10-21

10.6 MLI Use ................................................................................................................................. 10-21

10.7 Leak Tightness ...................................................................................................................... 10-22

11 Specification of Supplied Equipment ......................................................................................... 11-23

11.1 Valves .................................................................................................................................... 11-23

11.2 Pressure Safety Valves .......................................................................................................... 11-24

11.3 Vacuum Vessel Relief Devices .............................................................................................. 11-24

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

11.4 Thermal Relief ....................................................................................................................... 11-25

11.5 Temperature measurements ................................................................................................ 11-25

11.6 Pressure Sensors ................................................................................................................... 11-26

11.7 Materials ............................................................................................................................... 11-27

12 Cryogenic Equipment Protection ............................................................................................... 12-28

12.1 General ................................................................................................................................. 12-28

12.2 Ladders ................................................................................................................................. 12-28

12.3 Modular Platforms (see same note as in Section 6. This is a preliminary design. Supplier to offer alternative and/or skid mounted solution)........................................................................................ 12-28

12.4 Support Beams ..................................................................................................................... 12-29

12.5 Safety Railings ....................................................................................................................... 12-29

13 Manufacturing and Assembly Requirements ............................................................................ 13-30

13.1 Manufacturing ...................................................................................................................... 13-30

13.2 Labeling ................................................................................................................................. 13-30

13.3 Welding ................................................................................................................................. 13-30

13.4 Tube and Pipe Bending ......................................................................................................... 13-31

13.5 Cleaning ................................................................................................................................ 13-31

14 Shipping Requirements .............................................................................................................. 14-32

15 Examinations, Inspections and Tests Requirements.................................................................. 15-33

15.1 General ................................................................................................................................. 15-33

15.2 Nondestructive/destructive tests ......................................................................................... 15-35

15.3 Helium Leak Tightness Tests ................................................................................................. 15-35

15.4 Pressure Tests ....................................................................................................................... 15-36

15.5 Cold test ................................................................................................................................ 15-36

15.6 Cleanliness control ............................................................................................................... 15-36

15.7 Dimensional control ............................................................................................................. 15-36

15.8 Factory Acceptance .............................................................................................................. 15-37

15.9 Transport accelerations ........................................................................................................ 15-37

15.10 Factory outlet inspection ................................................................................................. 15-37

15.11 FERMIFORWARD Incoming inspection (at SURF) ............................................................. 15-38

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

16 Deliverables (This will apply for both LAr Circulation VD and HD) ............................................ 16-39

16.1 Deliverables for Manufacturing Phase (This will apply for both LAr Circulation VD and HD) .. 16-

17 Quality Assurance (This will apply for both LAr Circulation VD and HD) ................................... 17-41

18 Project Management (This will apply for both LAr Circulation VD and HD) .............................. 18-42

19 Document Management ............................................................................................................ 19-44

References

Appendix A – Design Parameters and Tables

Appendix B – Ross Shaft Load Envelopes

Appendix C – P&IDs for the Supply

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

List of Figures

Figure 1: The process flow diagram of the LAr Circulation System VD for Cryostat VD is outlined in red as its connections to LBNF/DUNE. As well LAr Circulation System HD for Cryostat HD in purple. ................ 6-9 Figure 9-3: Pump interface details ........................................................................................................... 9-17 Figure 9-4: Supply Skid’s View with Envelope ......................................................................................... 9-18 Figure 9-5: Supply Reference Point for Supply Envelope View 1 ............................................................. 9-18 Figure 9-6: Supply Reference Point for Supply Envelope View 2 ............................................................. 9-19

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

List of Tables

Table 1: Vacuum levels in insulation vacuum (vacuum jacket) ............................................................... 7-11 Table 2: Vacuum level Pressure Range .................................................................................................... 7-11 Table 3: Environmental conditions for CUC and detector cavern ........................................................... 8-14 Table 9-5: Supply equipment envelope ................................................................................................... 9-17

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

Acronyms and Abbreviations

Acronym Definition

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

ACI American Concrete Institute

ANSI American National Standards Institute

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

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

EVMS Earn Value Management System

FAT Factory Acceptance Tests

FDC Far Detectors & Cryogenics

FDR Final Design Review

FEA Finite Element Analysis

FMEA Failure Mode and Effect Analysis

FSCF Far Site Conventional Facilities

FSF Far Site Facilities

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

Acronym Definition

GAr Gaseous Argon

GAN Gaseous Nitrogen

GC General Contractor

GN2 Gaseous Nitrogen

HAZOP Hazard and Operability Analysis

HD Horizontal Drift

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

LIN Liquid Nitrogen

LN2 Liquid Nitrogen

MIP Manufacturing and Inspection Plan

MLI Multi-Layer Insulation

NB National Board of Boiler and Pressure Vessels Inspectors

NEC National Electric Code

NEMA National Electrical Manufacturers Association

NFPA National Fire Protection Association

NIST National Institute for Standards and Technology

NP Notification Point

NWD Navisworks Document

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

Acronym Definition

OEM Original Equipment Manufacturer

OSHA Occupational Safety and Health Administration

PDR Preliminary Design Review

PED Pressure Equipment Directive

PFD Process Flow Diagram

PLC Programmable Logic Controller

PRR Production Readiness Review

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

SDSTA South Dakota Science and Technology Authority

SLIN Subcontract Line Item Number

SOW Statement of Work

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

VD Vertical Drift

Liquid Argon Circulation VD and HD Statement of Work Scope of Document

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

1 Scope of Document This document describes the Scope of Work for the LAr Circulation System VD and HD for the Long- Baseline Neutrino Facility (LBNF). Exceptions to these specifications shall not be permitted, except by written approval from FermiForward.

Liquid Argon Circulation VD and HD Statement of Work Terms Used in the Document

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

2 Terms Used in the Document 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.

Liquid Argon Circulation VD and HD Statement of Work Applicable Codes and Standards.

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

3 Applicable Codes and Standards.

• ACI 318 Building Code Requirements for Structural Concrete and Commentary

• 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 Depressuring 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

• 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

Liquid Argon Circulation VD and HD Statement of Work Applicable Codes and Standards.

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

• 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 FERMIFORWARD. In such cases, the Subcontractor shall submit all the necessary documentation for approval to FERMIFORWARD. FERMIFORWARD, at its discretion, reserves the right to veto the use of certain codes or standards, in part or whole. In no event will FERMIFORWARD be responsible for schedule delays or cost increases associated with the review and evaluation of alternative codes or standards proposed by the Subcontractor.

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 FERMIFORWARD.

Liquid Argon Circulation VD and HD Statement of Work Project Introduction

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 4-5

4 Project Introduction LBNF (http:/lbnf-dune.fnal.gov/) will provide the FERMIFORWARD structure necessary to support the massive neutrino detectors located deep underground at the Sanford Underground Research Facility (SURF) in Lead, 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 17,500 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.

Liquid Argon Circulation VD and HD Statement of Work Scope of the Supply

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 5-6

5 Scope of the Supply

5.1 Scope of the Supply Description

The LAr Circulation System VD and HD Equipment (hereafter referred to, in whole or in part, as the “Supply”) acquisition includes the following:

• The detailed engineering of the Vacuum Jacketed Pump Valve Box with associated valves, instrumentation, support structures, and cryogenic protection equipment.

• The development of a schedule with dates and durations of engineering phase, manufacturing phase, testing phase, and final shipping. This includes but is not limited to all the material, equipment, documentation, and labor necessary to perform the work in accordance with contractual requirements to meet the defined schedule.

• The procurement of materials for the Vacuum Jacketed Pump Valve Box including the associated pipes, valves, instrumentation, support structures and cryogenic protection equipment.

• The manufacturing of the Vacuum Jacketed Pump Valve Box and associated valves, instrumentation, support structures and cryogenic protection equipment.

• The testing of the fabricated items per applicable codes and standards and in accordance with the specifications.

• Management, ESH and QA/QC oversight, and the administration of all subcontracts necessary to deliver the supply. This scope shall be inclusive of all material, equipment, labor, etc., necessary to perform the work in accordance with contractual requirements to meet the defined schedule.

5.2 Scope of the Supply Structure

The LAr Circulation System VD and HD acquisition is broken down into the equipment, valves and instrumentation that are detailed later in Section 11:

• Vacuum Jacketed Pump Valve Box

• MLI insulated upstream and downstream piping of the main LAr Circulation Pumps (Pumps are not part of Supply)

• Instrumentation

• Isolation Valves

• Pressure Safety Valves

• Cryogenic Equipment Protection (Platforms, Ladders and Supports)

Liquid Argon Circulation VD and HD Statement of Work General Description

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 6-7

6 General Description The LAr Circulation System VD and HD Equipment is responsible for transferring liquid argon coming from the Cryostat VD and Cryostat HD to the low-pressure suction side of the main LAr Circulation Pump (not part of this scope). It is also responsible for transferring liquid argon downstream of the main LAr Circulation Pump (not part of this scope) through the system resistance (friction and internal losses in valves, piping, etc.) to the LAr Purification system. The vacuum jacketed pump valve box (part of the scope) will be responsible for housing the pump, the MLI insulated upstream and downstream piping, isolation valves, and instrumentation required for this operation laid out above. The cryogenic equipment in the Detector Caverns will need to be properly protected and accessible with the use of platforms, ladders, support beams and railings (all part of this scope).

The LAr Circulation System VD for the Cryostat VD comprises of three (3) pump valve boxes that will house the following:

• Equipment − Three (3) Main LAr Circulation Pumps (Not Part of Supply) − Three (3) Coriolis flow elements

• Valves − Six (6) Pneumatic, non-insulated isolation on/off valves with limit switches − Three (3) Pneumatic, non-insulated control valves with positioners − Six (6) Manual, non-insulated isolation on/off valve − Forty-two (42) Manual, non-insulated purge valves − Twenty-one (21) Pressure safety valves for over-pressurization or trapped volume − Three (3) Vacuum Breakers − Three (3) Diverter Valves

• Instrumentation − Twelve (12) Pressure Transmitters − Six (6) Pressure Indicators − Three (3) Pressure Differential Transmitters − Twelve (12) Temperature Transmitters

• Un-insulated Piping − 304SS 4” SCH10 Piping (Length to be calculated/sized) by Supplier.

Upstream and downstream piping of LAr Circulation Pump Vent Header

− 304SS 1/4” x .065” wall Tubing (Length to be calculated/sized) by Supplier.

Purge lines Lines running from pressure safety valves to vent header

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 6-8

The LAr Circulation System VD will also need to include the following for cryogenic equipment protection.

The below cryogenic equipment laid out below should just be used as reference as it is modeled in as a placeholder in the LBNF Project model. The Supplier shall present an alternative design if possible whether that means a replication of what is below or a skid mounted concept:

• Two (2) 20’ Ladders

• Sixteen (16) 4’ x 5’ Modular Platforms

• Eight (8) 4.5’ x 10.5’ Modular Platforms

• Support Structure per Figure 4 that is made of:

• Steel W10 x 45 lb I-beams (roughly Quantity 16 of 20’ lengths)

• Twelve (12) 6’ Safety Railings

The LAr Circulation HD System comprises of the exact same configuration and cryogenic equipment protection as laid out for LAr Circulation VD above.

A simple flow schematic for the LBNF cryogenics subsystems is shown in Figure 1 below. The LAr Circulation VD system is outlined in red. The LAr Circulation HD system is outlined in purple. Notice that the pumps are not circled as they are not part of the scope.

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 6-9

Beyond the general functions outlined previously, the LAr Circulation VD and HD Equipment must adhere to detailed specifications for each aspect outlined in Sections 7 through 19.

Figure 1: The process flow diagram of the LAr Circulation System VD for Cryostat VD is outlined in red as its connections to LBNF/DUNE. As well LAr Circulation System HD for Cryostat HD in purple.

Liquid Argon Circulation VD and HD Statement of Work Engineering Requirements

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 7-10

7 Engineering Requirements

1. The Subcontractor shall properly calculate and choose the size, thicknesses, and material of the

Pump Valve Box shell and heads (Bottom and Top) based on codes listed in Section 3 of this SOW for vacuum vessel design.

a. The relative envelope size and interface details of the main LAr Circulation Pumps will be provided by FERMIFORWARD to the Subcontractor of the Supply so that the specific/dedicated penetration that accounts for this pump can be properly sized and located on the pump valve box. Based on industry experience, the pump will need to be installed vertically.

b. The configuration and size of the upstream and downstream piping of the LAr Circulation Pump shall be met by the Subcontractor. Details of these requirements flow down from Fermi Forward’s pump subcontractor based on their expertise and experience for optimal pump performance.

c. The entire valve box will need to fit into an envelope driven by the Ross Shaft from which it will be transported down to the detector cavern in. The details / dimensions of this Ross Shaft Elevator can be found in Appendix B. Proper lifting supports (lifting lugs, eyes, etc.) will need to be properly engineered for thicknesses and weld sizes to account for the loads and allow for easy lifting. A handling plan is part of the deliverables as part of this scope.

d. The vacuum housing itself does not need to be U-stamped as a requirement but the calculations for size and thicknesses should be based on codes listed in Section 3 of this SOW using the vacuum pressure as the internal pressure of the valve box. The calculated overall stresses shall remain within acceptable values dependent on the chosen design code in Section 3 of this SOW. The vessel shall also be shown to be resistant to buckling per the chosen design code in Section 3 of this SOW.

e. All penetrations shall be properly calculated for any necessary reinforcement.

f. In the case of “loss of vacuum insulation” where the temperature of the pipe/vessel changes from the ambient temperature (see Table 1). If expansion joints are used in the vacuum jacket, the Subcontractor shall consider the capacity to withstand the specified design cases without mechanical failure or permanent deformations. The following requirements also apply:

i. The vacuum insulation space shall be designed for continuous sealed vacuum operation. The vacuum space shall be capable of isolation with vacuum-rated valves to avoid continuous pumping.

ii. Each vacuum vessel shall have a CVI valve that serves as a pump-out, isolation valve, and safety release device. Automated valves shall be located on the pumping station and shall close upon loss of power.

g. The vacuum isolation space design pressure is listed below:

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

Table 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 2: Vacuum level Pressure Range

Description Minimum Pressure Maximum Pressure psia bara psia bara

Internal 0 0 21.8 1.5

External Atmospheric Atmospheric Atmospheric Atmospheric

h. The mechanical design of the vacuum jacket shall consider also the appropriate thermal load and displacement given by the cryogenic temperature.

i. The vacuum vessel support structure and lifting lugs shall account for all forces, including but not limited to weight, vacuum load, and all dynamic loads that may occur including accidental loss of insulating vacuum and seismic events (lifting lugs may be excluded from the seismic case).

j. The main LAr Circulation Pumps are meant to be a removable assembly. The isolation valve and vent configuration need to be designed to allow for the pump to be removed and see maintenance without breaking vacuum.

2. The Subcontractor shall perform stress and thermal / flexibility analyses for the piping to verify the performance requirements listed below:

a. The piping itself shall be designed based on upon codes listed in Section 3 of this SOW specifically ASME B31.3. The material choice should account for cryogenic temperatures of liquid argon and based on codes listed in Section 3 of this SOW

b. The Supply shall be designed to minimize the effects of heat leak from ambient temperatures into the LAr circuits and to minimize heat transfer between circuit lines.

The relative lengths for heat leak should be accounted for in the design. See heat leaks limits in Table 20-3.

c. The Supply shall be designed to minimize the pressure drop. The lengths and choice of fittings / flexhoses that could account for system losses should accounted for in the design to meet performance requirements. See Table 20-3.

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

d. This would include not just for the upstream and downstream piping but also the vent header that has all vent lines running to it.

3. The Subcontractor shall perform relief calculations to properly size relief valves for over pressurization and trapped volume scenarios. The trapped volumes will be evident through the use of the reference P&ID in Appendix B.

4. The Subcontractor shall properly specify control valves and manual valves based on calculated Cv values based on the pipe parameters, fluid characteristics and K-values.

a. Design and placement of all valves shall allow for ease of operation, inspection, maintenance, and troubleshooting.

5. The Subcontractor shall properly specify instrumentation based on design / operating parameters.

The instrumentation shall allow for verification of the health and performance of the pump. The P&ID provided is for reference but should be closely followed based on the feedback received from the pump manufacturer.

a. Design and placement of all instrumentation shall allow for ease of operation, inspection, maintenance, and troubleshooting.

6. The Subcontractor shall provide engineering analysis and other design documentation of the vacuum vessel for the Supply including but not limited to detailed weld design, reinforcement of joints, material selection, and examination and testing records which is subject to FERMIFORWARD written approval

Liquid Argon Circulation VD and HD Statement of Work Functional Requirements

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

8 Functional Requirements

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

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

3. Facility electrical power to the Supply equipment at the 4850 level is to be provided by an

FERMIFORWARD electric feed. FERMIFORWARD will provide the Supply with fused disconnect switches, circuit breakers, GFCI outlets, and power cables.

4. Each pump unit will 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 FERMIFORWARD).

5. Each pump unit shall be instrumented with a pressure differential transmitter. All the pressure differential readings should be available through the Supply control system. Only the differential pressure transmitter is part of this scope.

6. Each vacuum insulating space on the process lines and vessels shall have a vacuum reading Supply (pressure transmitter, PT) and protection from overpressure (PSV).

7. The Subcontractor shall include a complete list of instrumentation to be furnished, as well as indicate whether the items are locally displayed and/or computer interfaced. All I/O points shall be brought to terminal strips in a local interconnect box. This list specifically excludes hard-wired or proprietary safety interlock systems that are the sole responsibility of the Subcontractor.

8. All electrical interfaces including but not limited to thermometer and pressure transducer cables, valve actuators, and/or readbacks, shall meet at a single control panel (e.g., a terminal box) and be clearly labeled for ease of integration into the detector cavern control system supplied by

FERMIFORWARD.

9. The subcontractor’s supplied equipment shall not include any form of onboard logic unit (i.e., PLC).

10. All instrumentation shall be independently controllable (with the exception of those controlled by an FERMIFORWARD-approved onboard logic unit). Instruments shall be controllable and or provide readback in the form of 2-wire 4-20 mA analog signals, 24V discrete signals, or resistance (for RTDs).

An exception may be made to this requirement for Fieldbus-capable instruments, but only with proper justification. Fieldbus control of instrumentation shall be reviewed and approved by FERMIFORWARD. The preferred Fieldbus is ProfiNet.

11. Connectors

b. a. Electrical connectors shall be of the type D-subminiature or MIL-DTL-26482 (circular quick-disconnect).

c. b. The connector body shall be corrosion-resistant, electrically conducting, and made of

Austenitic Stainless Steel (AISI grade 304/304L or AISI 316/316L).

d. c. The connector pins shall be corrosion-resistant and electrically conducting. Gold-plated pins are preferred. The connector shall be able to handle voltages up to 50 V and currents up to 2 A from pin to pin and from pin to ground.

Liquid Argon Circulation VD and HD Statement of Work Functional Requirements

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 8-14

e. d. The connector insulator shall be made of glass, ceramic, or a combination of these materials. The insulator and its junction to neighboring parts shall be corrosion resistant. The electrical resistance from pin to pin and from any pin to ground shall be higher than 300 MΩ.

f. e. Flange-mounted connectors shall be mounted on an ISO-K DN63 or ISO-K DN100 vacuum flange made of Austenitic Stainless Steel (AISI grade 304/304L or AISI 316/316L). Each connector-flange assembly shall be helium leak tested individually. The maximum allowed leak rate shall be less than 1E-10 Pa.m3/s. The connector-flange assembly shall maintain all characteristics in the vacuum and atmospheres of air and gaseous argon and shall be able to withstand a pressure difference of 22 psi (1.5 bar).

g. f. The location and installation of the connectors shall guarantee the absence of humidity.

h. g. The Subcontractor shall provide the mating connector for all connectors in the envelope.

12. The Supply shall be designed for indoor use inside the Detector Cavern. Temperature, humidity, and other environmental factors are shown in Table 3.

Table 3: Environmental conditions for CUC and detector cavern

Parameters Units CUC and Detector 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 (Max, summer and winter) °F, K, °C The maximum dew point of 48, (282) 9

Liquid Argon Circulation VD and HD Statement of Work Interface Requirements

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

9 Interface Requirements Table 9-1 below defines the scope split between the deliverables in this scope and deliverables not in this scope. The first column will help distinguish the tie points correlating to the FERMIFORWARD reference

P&ID:

Table 9-1: Interface Table

To clearly distinguish the connection between the Vacuum Jacketed Piping on the ends of the Pump Valve Box and the Argon Distribution Piping (not in this scope), see Figure 9-2 below:

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 9-16

All elements that are NOT in grey are in the LAr Circulation Scope. These features are detailed in the “Elements” table in the first four rows.

All elements that are grey are in the LAr Distribution Piping Scope (not in this scope). These features are detailed in the “Elements” table in the last three rows.

Figure 9-3 shows that the pumps (not part of this scope) will need to have a dedicated plate on the valve box to attach to. The plate mounting details will be shared from the pump manufacturer. The Supplier will need to ensure that the location of the mounting plate is optimized for the adjacent uninsulated piping (also part of this scope).

Figure 9-2: Vacuum jacket interface details

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 9-17

The envelopes’ dimensions are shown in Table 9-5.

Table 9-4: Supply equipment envelope

Name of Package Length Width Height

Main Circulation Systems VD (left) 18 ft (5.5 m) 10 ft 6 in (3.2 m) 21 ft 4 in (6.5 m)

Main Circulation Systems VD (right) 18 ft (5.5 m) 10 ft 6 in (3.2 m) 21 ft 4 in (6.5 m)

Main Circulation Systems HD (left) 18 ft (5.5 m) 10 ft 6 in (3.2 m) 21 ft 4 in (6.5 m)

Main Circulation Systems HD (right) 18 ft (5.5 m) 10 ft 6 in (3.2 m) 21 ft 4 in (6.5 m)

Figure 9-4 illustrates the Supply envelope. This illustration can also be referenced for LAr Circulation HD as they are identical The Supply is outlined in Appendix C, Figure 9, on P&ID F10028329.07. This P&ID can also be referenced for LAr Circulation HD as they are identical. The four (4) Inline safety valves and three

(3) pump units with VFDs are outside the scope of this Statement of Work.

Figure 9-2: Pump interface details

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 9-18

Figure 9-3: Supply Skid’s View with Envelope

Figure 9-5 outlines the 0.0 reference point from the drift central line 8’-7 1/2” (2.63 m) and Figure 4 shows the distance from the CUC 0.0 point to the central line in the drift for the Supply as 318’-3 3/4” or 97.02

m. https://edms.cern.ch/document/2255620/3.

Figure 9-4: Supply Reference Point for Supply Envelope View 1 https://edms.cern.ch/document/2255620/3.

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 9-19

Figure 9-6 below shows the relative location of the packages in the South and North Caverns relative to the Central Utility Cavern.

Figure 9-5: Supply Reference Point for Supply Envelope

View 2

Liquid Argon Circulation VD and HD Statement of Work Mechanical Requirements

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 10-20

10 Mechanical Requirements

10.1 General Mechanical Requirements

1. 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 FERMIFORWARD written approval.

2. Pressure safety valves (PSVs) shall be from Austenitic Stainless Steel (AISI grade 304/304L or AISI 316/316L). The vent shall have a diverter valve between relief valves to ensure overpressure protection during the maintenance of the relief valves.

10.2 Coriolis Flow Meter

1. Micro Motion ELITE CMF350M Coriolis Meter, 4 Inch (DN100), 316L Stainless Steel or equivalent.

2. Fluid work temperatures and flow are shown in Appendix A, Table 20-2.

3. Denoted in P&ID F10028329.07 Grid H-16 FT-10312A, Grid F-16 FL-10255A, Grid D-16 FL-10275A, see Appendix B.

10.3 Hose, Bellows, etc.

1. Flexible hoses and bellows may be used within vacuum jacket insulation only.

2. Whenever possible, all hoses and bellows shall be welded. When not possible, hydroformed bellows are allowed subject to FERMIFORWARD approval.

3. Multiple layered bellows shall be designed to have a vent hole between each layer to prevent overpressure from the trapped volume gas.

10.4 Internal supports

1. The Supply shall be designed with internal supports within a vacuum jacket.

2. Internal supports shall be designed to withstand all loads exerted on a given supported component as required by Code, listed in Section 3, including but not limited to thermal, pressure, vacuum, transportation, testing, as well as moments due to misalignment, and flexible hoses used for thermal compensation.

3. Internal supports shall be designed to minimize heat leaks to cryogenic piping and pressure vessels.

4. Internal supports shall be designed such that cross-sectional flow is not obstructed equal to or larger than the vacuum vessel port area to minimize longitudinal relief flow impedance in case of an internal line rupture.

5. The Subcontractor shall provide engineering analysis and other internal supports design documentation for the Supply including but not limited to material selection, calculated heat leak, and design safety factors according to codes listed in Section 3.

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 10-21

6. There shall be at least two (2) spacers G10-CR wherever sliding support is necessary at the interface connection and to ensure that all internal pipes are at the correct location and angle within the vacuum jacket.

10.5 Thermal Insulation

1. Cryogenic vessels and pipes shall be vacuum insulated, in combination with aluminized mylar, Multi-layer Insulation (MLI), to minimize heat leak, with no active mechanical pumping. The specific value of each component shall be approved by FERMIFORWARD during the design reviews.

2. The choice of cryogenic insulation is subject to FERMIFORWARD written approval.

3. The pumping ports shall avoid the intake of any loose MLI. The installation of grids at the inlet of each pumping port is acceptable provided they do not compromise the pumping process by excessive pressure drop and are designed to prevent blocking by MLI.

4. Each vacuum space shall be equipped with a convection vacuum gauge described in the SOW in the pressure sensors chapter below.

5. There shall be no condensation of water on the vacuum jacket of any Supply under normal operation. No ice shall be visible on the outside of the vacuum insulation while in normal operation (with the process pipe carrying cryogenic fluid). The insulation surface temperature should be according to the Code, see Section 3.

10.6 MLI Use

1. MLI shall be protected from humidity and dust. The handling of MLI shall be done using powder-free white gloves to control cleanliness. The compression of the layers during the wrapping operation shall also be prevented. Storage of MLI, whenever applicable, shall be made in a room with a controlled environment where the relative humidity shall not be higher than 55%. During manufacturing and installation, the components on which the MLI has been wrapped shall be periodically controlled (after each mechanical intervention) to check their cleanliness and to verify that the MLI has not been damaged.

2. It shall be ensured that the MLI is protected during welding operations to avoid damage and fire due to the presence of a heat source. The contractor shall make use of appropriate non- flammable protection material installed over the MLI or shall foresee the use of welded backing rings at the location where vacuum jacket welds will be performed.

3. MLI shall be fixed using appropriate fixation methods (e.g., using Mylar tape) and considering the internal movements occurring during temperature transients to prevent uncovering cold surfaces and degradation of MLI. The overlapping of MLI layers, whenever applicable, shall be made respecting the temperature gradient across MLI to prevent layers at different temperatures from being in contact with each other.

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 10-22

4. The Subcontractor shall guarantee that a dedicated procedure for MLI wrapping is established, implemented, and maintained for the manufacturing and installation phases to comply with the requirements described above.

5. For the intended vacuum pressure of 5x10-2 Pa (5x10-4 mbar), the heat flux through MLI layers shall not be higher than 0.3 Btu/hr/ft2 (1 W/m2) from 300 K to 87 K.

6. This value shall be considered for the choice of an appropriate MLI. The MLI wrapping around the process pipes shall not create a confined space preventing discharge and evacuation events. The MLI shall be installed in a manner such that it will not detach or degrade during evacuation operations.

10.7 Leak Tightness

The maximum leak rates at the maximum pressure differential for vacuum and non-vacuum insulated components shall not exceed the values given in Table 20-5.

Liquid Argon Circulation VD and HD Statement of Work Specification of Supplied Equipment

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US 11-23

11 Specification of Supplied Equipment

11.1 Valves

1. The Subcontractor shall provide manual valves, control valves, actuators, and positioners along with associated specification sheets.

2. All valves within the LAr process path to the cryostat shall be Ultra-High Purity (UHP) series.

3. All “On/Off” Pneumatic and Control cryogenic valves should be with a calculated Cv value.

4. All valves shall have a means of locking out of service for maintenance. For fail-closed pneumatic valves, isolation, and venting of air lines to the actuator is a possibility.

5. Provisions shall be made to allow valve or valve stem replacement such that extensive removal of adjacent equipment is not necessary.

6. All valves shall have the manufacturer name and model number clearly and permanently marked on the valves themselves for visual observation.

7. The components installation shall meet all Original Equipment Manufacturer (OEM) installation requirements, including but not limited to flexibility and deflection requirements with internal compensation inside the vacuum vessel.

8. All valves shall be leak-tight across the seal and seat when closed. Leak rates are measured at room temperatures and maximum working pressure. See Table 20-5 for reference.

9. Cryogenic valves should be of enough length to reduce the heat load and guarantee their functioning when at cryogenic temperature by meeting the Codes listed in Section 3. The heat load shall not exceed 13.6 Btu/hr (4W) per Supply.

10. Three different valve icons are shown in the conceptual piping and instrumental diagrams (P&ID).

They are shown in Figure 11-1. These valve types shall have the…