LMTF RF Final PCR I Report 12 18 2025.pdf

MILCON PLANNING CHARRETTE REPORT I

Little Mountain Test Facility – Radiation Facility

Hill AFB, UT

Project No. KRSM246690

Contract FA8207-17-D-0001

18 December 2025

Dekker

7601 Jefferson Street NE, Suite 100

(505) 761-9700

TABLE OF CONTENTS

PART 1 INTRODUCTION

1.1. Purpose of PCR

1.2. Project Overview

1.2.1. Purpose and Scope

1.2.2. Description of Proposed Construction

1.2.3. Analysis of User Requirements

1.2.4. Cost Estimate

1.3. Outstanding Issues and Recommendations

PART 2 PRIMARY FACILITIES

2.1. Site Selection and Development

2.2. User Information and Space Analysis

2.2.1. Facility Description:

2.2.2. Space Analysis

2.2.3. Concept Sketches

2.3. Parametric Design Analysis

2.3.1. Structural

2.3.2. Architectural

2.3.3. Services

2.3.4. Anti-Terrorism/Force Protection

2.3.5. Sustainability Requirements

2.3.6. Airfields

2.3.7. Design Guidelines

PART 3 SUPPORTING FACILITIES

3.1. Other User or Mission Facilities

3.2. Site/Civil

3.2.1. General

3.2.2. Facility Demolition:

3.2.3. Site Preparation

3.2.4. Site Improvements

3.2.5. Site Utilities Requirements

PART 4 EQUIPMENT FROM OTHER APPROPRIATIONS

4.1. User and Mission Requirements

4.2. Equipment Details

4.2.1. Pre-Wired Work Stations

4.2.2. Information Systems Requirements

4.2.3. Non-RPIE Generators/UPS/other backup power storage or capability

4.2.4. Other equipment items

PART 5 OTHER SCOPE/COST CONSIDERATIONS

5.1. Environmental Issues

5.2. UXO, Cultural, Real Estate, etc. Issues

5.3. Site Accessibility

5.4. Construction Security

5.5. Construction Phasing

5.6. Temporary user space

5.7. Approvals/Exemptions/Waivers

5.8. Other Items (specify) as Necessary

PART 6 BASIS OF COST ESTIMATE

PART 7 APPENDICIES

A List of Participants

B Initial/draft DD 1391

C Updated/proposed DD 1391

D Maps/Plats/Utility/Demolition/Site Analysis

E Photos (of the site and of adjacent areas)

F References/Related Criteria (UFC, AFIs, etc.)

G Parametric Cost Estimate

H AF MILCON Sustainability Requirements Scoresheet

I Meeting Minutes/Charrette Attendance Roster

J UFC or FC Space Summary Worksheet (not applicable)

PART 1 INTRODUCTION

1.1. Purpose of PCR

This Planning Charrette Report (PCR) documents the validation process for the Little Mountain Test Facility Radiation Facility at Hill Air Force Base (AFB), UT. Dekker was contracted by Boeing under contract FA8207-17-D-0001, Task Order FA820725F0002, to validate the scope, requirements and cost for subject project. The objective of the effort is to clearly define and confirm project requirements, scope, cost and criteria.

The Dekker Team first reviewed the draft DD 1391 form provided by the user. An orientation teleconference was conducted on January 15, 2025 to inform project stakeholders about what to expect during this process. Additional project information was obtained from Boeing and United States Air Force (USAF) integrated project team (IPT) representatives prior to the on-site charrette conducted January 15, 2025. During the charrette, a visual inspection of the project site was performed. After the on-site charrette, the IPT was expanded to include representation from the United States Army Corps of Engineers (USACE). The IPT has met bi-weekly on an ongoing basis to develop the project requirements, scope, and criteria. This report documents the findings and subsequent analysis of requirements.

1.2. Project Overview

1.2.1. Purpose and Scope

The Little Mountain Test Facility (LMTF) is a state-of-the-art test facility, Air Force Materiel Command laboratory dedicated to simulation testing of nuclear hardness, survivability, reliability and electromagnetic compatibility of defense systems. Center test laboratories simulate environments for nuclear radiation, air blast, shock and vibration, electromagnetic pulse, electromagnetic interference, and compatibility testing.

The 1,000-acre facility is located 15 miles west of Ogden on 12th Street, near the Great Salt Lake as part of Hill Air Force Base (Hill AFB) UT. The Boeing Company maintains and operates LMTF for the USAF.

There are no existing facilities at LMTF that can accommodate the space and functional requirements for ARES, FXR, and the 14 MeV Neutron Generator equipment and associated personnel. A new facility for unique radiation effects test equipment is needed to accommodate future Nuclear Hardness Mission Requirements.

The IPT previously participated in a planning study to develop a Program of Requirements, Conceptual Floor Plan, and Rough Order of Magnitude (ROM) Opinion of Probable Construction Costs for a facility to accommodate specialized radiation effects equipment and personnel to meet future mission as a first step in project execution. This PCR I report is developed based on the Boeing LMTF Program of Requirements document dated March 2023.

The project title is identified as Radiation Facility to be installed at Hill AFB Site #1, Program Element 91211F, Category Code 310-924, and Project Number KRSM246690. The project will ultimately construct a facility of approximately 38,651 gross square feet (GSF) at an estimated total project cost of $79,175,869. The project design and this PCR I report are prepared for the project inclusion on the FY 29 MILCON Integrated Priority List (IPL).

The facility will be designed as permanent construction in accordance with Department of Defense (DOD) Unified Facilities Criteria (UFC) 1-200-01 and will comply with DOD anti-terrorism/force protection (ATFP) requirements per UFC 4-010-01.

1.2.2. Description of Proposed Construction

The proposed facility is a single-story building totaling 38,651 GSF, consisting of a standard-height administrative wing of 6,613 GSF attached to an oil tank storage room of 1,780 square feet and a high-bay wing of 30,257 GSF containing the test cells and other workspaces. The building location is directly across the main vehicular drive from existing Building 4301. Thus, the main entrance on the north side of the new building is directly accessed from the south side main entrance of 4301.

The facility is proposed to be situated to take advantage of the large natural grade change across the site, in that the high-bay wing containing the test cells is situated at the back of the building, surrounded by the dug-out retained hillside. This allows the earth of the hillside to be used to provide most of the necessary horizontal shielding required by the test cells, reducing the need for thick concrete shield walls internal along that elevation of the building.

The administrative wing is designed to be open and unclassified and provide more public oriented spaces near the main entrance: vestibule, lobby, kitchenette, custodial closet, mother’s room, and restrooms. The remainder of the administrative wing consists of private and open office areas, visitor touchdown spaces, huddle rooms and various administrative support rooms.

Windows are provided for daylighting and views in as many office areas as possible, and the vestibule and lobby areas are provided with large storefront assemblies to take advantage of the northern light and views.

The high-bay wing is designed to be entirely a secured/open storage area and contains a classified conferencing space with STC-50 minimum walls/doors in addition to all of the various test cells and support spaces. One controlled access door is provided between the open administrative wing and the secured High-Bay wing. The structure is higher to provide the necessary space for bridge cranes and provide 16 feet minimum clear height throughout for working/testing purposes. Test cells with solid concrete and/or modular concrete shield walls are designed according to the requirements for each of the individual pieces of test equipment. Three bridge cranes are anticipated, one at the Vehicle Loading/Unloading Area, one for the ARES test cell, and one to provide access to move the modular shield blocks in and out between the SFXR test cell and 14 MeV test cells to allow for combined effect testing utilizing both of those two pieces of testing equipment simultaneously.

1.2.3. Analysis of User Requirements

The ARES, 14 MeV Neutron Generator, and associated facility are part of the modernization plan as defined by the “Report on Modernization Plan for Hill Air Force Base Little Mountain Test Facility” (Office of the Assistant Secretary of the USAF, Honorable Andrew P. Hunter).

There are no existing facilities at LMTF that can accommodate the space and functional requirements for ARES, FXR, and the 14 MeV Neutron Generator equipment and associated personnel. Therefore, Air Force Nuclear Weapons Center (AFNWC) is not presently meeting mission objectives. The new facility will allow AFNWC to successfully meet the LMTF modernization mission objectives.

The administrative wing of the facility consists of the following spaces:

1. Vestibule - 135 SF

2. Lobby - 556 SF

3. Corridor - 95 SF

4. Oil Tank Storage Room (see below)

5. Men’s Restroom consists of one HC water closet, one non-HC water closet, urinal, 3 lavatories.

6. Women’s Restroom consists of one HC water closet, two non-HC water closets, 3 lavatories.

7. Security Room – 310 SF

8. Women’s Shower - HC shower

9. Men’s Shower - HC shower

10. Janitor Closet

11. Mothers Room

12. Break Room – 276 SF

13. Print Room – 147 SF

14. IT Room – 245 SF

15. (3) Offices – 140 SF each

16. (1) Office – 150 SF

17. (1) Office – 240 SF

18. (1) Office – 341 SF

19. Open Office – 772 SF

The high-bay laboratory wing of the facility consists of the following spaces:

20. Service Entrance/Fire Riser Room – 230 SF

21. Electrical Room – 228 SF

22. Secure Conference Room – 832 SF

23. Vehicle Storage Loading Dock – 800 SF

24. Flexible area – 9,372 SF

25. ARES Test Lab – 4,580 SF

26. ARES Aux Room – 688 SF

27. Storage - 307 SF

28. Dosimetry Lab – 292 SF

29. ARES Comm Room – 840 SF

30. ARES Control & Screen Rooms – 1,336 SF

31. Dosimetry Lab – 288 SF

32. Cobalt Storage – 262 SF

33. Tritium Storage – 385 SF

34. 14 MeV – 2,950 SF

35. 14 MeV Comm Room – 221 SF

36. (2) SFXR– 220 SF each

37. (2) SFXR Test Cell – 270 SF each (movable concrete blocks separate 14 MeV from SFXR)

38. 14 MeV & SFXR Screen Room & Operation – 768 SF

39. SFXR Aux Room – 935 SF

The oil tank storage and containment room adjoining the other two building wings is approximately 1,780 square feet.

The Economic Analysis Waiver is identified by USAF SAF/FMCE Action Memo signed by Mr.

Andrew Wallen (HAF SAF/Pentagon) with the following recommendation:

“Approve the CA Waiver for a Radiation Research Facility at Hill AFB with the condition that the estimate of $84M on the current DD1391 (which may not be sufficient to construct a 50,000 square-foot facility, compliant with Intelligence Community Directive (ICD) -705 standards, Special Access Program (SAP) requirements and designed to shield ionizing radiation) is updated to reflect a more accurate cost estimate.”

The Class 3 cost estimate included with the 35% Design/PCR 1 provides 75 ABW/CE with the updated Class 3 cost estimate for DD 1391 revision, which will be submitted for final approval of the Economic Analysis Waiver, by SAF/FMCE.

1.2.4. Cost Estimate

See Cost Estimate Appendix G.

1.3. Outstanding Issues and Recommendations

Specific 14 MeV program requirements and design inputs are outstanding. The current space and technical requirements for the 14 MeV SAPF spaces are preliminary, minimally defined by initial concept provided by Boeing and associated IPT assumptions regarding combined effects testing requirements.

The ARES space and technical requirements are also preliminary assumptions based on the stage of equipment procurement. The preliminary assumptions are based on the preliminary equipment specifications and general information provided by the bidders for the design and manufacture of

ARES.

Generators, chillers, water heaters, and other heating, ventilation, and air conditioning equipment identified throughout this report require equipment selection to be finalized during detailed design development. Ensure required permitting, as necessary based on equipment selection, is coordinated in a timely manner with 75th Civil Engineering and Air Force Nuclear Weapons Center (AFNWC) Environmental to complete new source sheets and properly document new equipment being brought to the site.

LMTF and mission/program representatives have not definitively determined that the quantity of radioactive materials to be stored in the facility are at or above the Category 1 or Category 2 quantities identified in Appendix A of 10 CFR 37. Based on the information provided regarding stored materials, the design team assumes that 10 CFR 37 is not applicable but hold open this item for confirmation with additional program input in future design development stage.

Provisions for transport of secondary containment effluent for off-site treatment and disposal have not been identified based on the anticipated facility operation to define infrastructure requirements.

LMTF and mission/program representatives have not definitively determined the Mission Assurance Category (MAC), if any, associated with the telecommunications equipment rooms in the facility in accordance with TSFPEWG G 3-600.01.01-18, chg. 1 and UFC 3-600-01, chg. 6.

Currently, the design assumes that no Mission Assurance Category applies to the facility telecommunication rooms since a specific level is required to determine the required protections.

Confirmation of specific security classification levels has not been provided. The current design conservatively includes dedicated communications and network infrastructure for each of the SAPF spaces to operate up to a Top Secret (TS) level of classification separate from the other co-located programs within the facility.

It is not determined whether the primary pieces of equipment in the facility require the structure to be designed for a specific level of vibration sensitivity. Strict vibration requirements would likely influence the structural member sizing with associated ground load impact and material cost.

It has not yet been determined whether dedicated trash and recycling disposal facilities need to be located on the site. These facilities require area that is not available in the immediate vicinity of the site without increasing the facility development area and incurring additional excavation cost. Required parking is identified to be accommodated by existing parking facilities, which require evaluation by LMTF representatives to confirm that adequate available capacity exists.

PART 2 PRIMARY FACILITIES

2.1. Site Selection and Development

A variety of site options were explored by the Integrated Project Team (IPT) representatives ranging from modification of existing facilities and potential new building location options to accommodate the space and functional requirements of the new capabilities. (See Exhibit.).

Key siting requirements would allow existing testing operations to continue during construction, provide functional adjacencies to existing activities (primarily in Building 4301), and potential functional efficiencies and/or in the cost or speed of construction.

Modifying existing facility options all share the disadvantages of those facilities being older structures with aging infrastructure, possible hazardous materials, and varying space availability.

The consensus among the IPT is that the extensive renovations required to meet the space and functional requirements would result in a greater construction cost than a designed-to-suit new facility.

The proposed site chosen is directly southeast of Building 4301, which has the advantages of providing a new-build option with available site infrastructure and easy functional access to the main operational and testing facility (Building 4301) and shipping and receiving at Building 402.

Exhibit --- Facility and Site Options

a. Opportunities

The selected site is located along the existing primary access route into LMTF, immediately southwest of the existing shipping and receiving functions of Building 402. Existing utilities are situated along the site for ease of service interconnection. The existing natural grade of the site slopes steeply to the southeast away from the road. Situating the new facility close to the existing roadway grade with the natural slope retained behind is advantageous for natural earthen radiation shielding for the test activities to be performed.

b. Constraints

The site is constrained primarily by the location of the existing PL3 perimeter fence along the southwest side of the proposed site area. The perimeter fence will need to be relocated based on the anticipated building footprint, vehicular access aisle width, and ATFP standoff distance. The fence ultimately is required to connect to the existing gate location to avoid impacting the existing gate, access road right-of-way, and the entry to the parking facilities due west of the gate. The site is secondarily constrained by the topography, specifically and steep grade change to the south. The further the development footprint extends to the southeast, the more excavation and retention scope will be necessary, with a corresponding increase in construction cost.

2.2. User Information and Space Analysis

LMTF representatives have indicated that new space radiation effects equipment is needed to provide unique test environments to accommodate future Nuclear Hardness test requirements for ICBM Missions.

Existing radiation effects laboratories and testing areas are located in Building 4301 at LMTF.

Space within this building cannot accommodate the space and specialized requirements of the new radiation effects equipment envisioned and the new associated personnel anticipated to meet the future testing requirements.

LMTF desires to construct a facility to provide space for the unique test equipment and personnel space to meet future Nuclear Hardness mission requirements. Specific goals for the facility include:

• Meet a 50-year minimum lifecycle

• Provide a test and evaluation environment that is driven by testing requirements for new and future weapon systems.

• Accommodate required staff to operate and maintain the laboratory

• Plan, design, and construct the facility consistent with Air Force building requirements

Four new radiation effects capabilities are envisioned:

• Advance Radiation Environment Simulator (ARES)

- Need:

o ICBM System & Subsystem level testing o Alleviate burden from oversubscribed Large Fash X-Ray (LFXR)

- Need by:

o Ground Based Strategic Deterrent (GBSD) o Machine needed by CY2035 o Lead time estimated at 3.5 years

- Benefits & Payoff o ~5x higher dose rate o Improved trigger performance o Larger beam size o Increased shot rate

• Small Flash X-Ray Replacement (SFXR)

- Need:

o ICBM part characterization capability o Replace current obsolete test capability

- Need by:

o Machine replacement needed by: In-work by Boeing at LMTF, IOC and FOC dates have slipped due to repairs of SFXR was: FOC December 2026 o Out of cycle request through the Central Test and Evaluation Program/ Test

Resource Management Center (CTEIP/TRMC)

- Benefits & Payoff o Higher endpoint energy o ~9x larger beam size o Allows for overlap from the Linear Accelerator (LINAC) and LFXR o Maintains current Small Flash X-Ray (SFXR) capability

• 14 MeV Neutron Generator

- Need:

o Microelectronic and subsystem characterization and qualification o Neutron Displacement Damage & Neutron Single Event Effects

- Need by o The ICBM community users of the 14 MeV are defining the proper funding channels for solidifying the draft KPPs and KSAs (i.e., requirements) via Design Study of the 14 MeV. The need date will be derived from ICBM program(s) Test and Evaluation Master Plan (TEMP) and provided at a later date.

o Current capability gap exists for GBSD part characterization effort o Funding needed by FY22 o Strategic Radiation Hardened Electronics Council Performance Objective

Memorandum (SRHEC POM) FY25

- Benefits & Payoff o Capability does not exist o Dedicated to DoW ICBM o Reduction in risk

• Co 60 Range Source

- Need o Capability for larger sub-systems and systems o Current source replacement due o Current source aging out by 2027

- Need by:

o Machine on floor by 2nd quarter 2026 o Funding needed by FY24

- Benefits & Payoff o Commercial off the Shelf (COTS) item o Allows for larger test articles o (components, systems & subsystems)

The Co 60 Range source can be accommodated within existing space in Building 4301.

The other three capabilities (ARES, SFXR, and 14 MeV Neutron Generator) will require the construction of additional space in a dedicated, new facility built to suit.

2.2.1. Facility Description:

Two types of space are required to support testing equipment and the associated personnel:

Radiation Effects Laboratories and Support Areas

A laboratory area is needed for the specialized radiation effects equipment, and test cells, including required shielding, and associated screen, control, and auxiliary rooms.

Support areas for material storage, dosimetry testing, and a classified conference room are also required. The laboratory area needs a receiving area with loading dock to accommodate forklifts and delivery trucks and sufficient flexible circulation space for testing operations.

The proposed equipment: the Advance Radiation Environment Simulator (ARES), Small Flash X-Ray (FXR), and 14 MeV Neutron Generator will be specially designed, manufactured, and fabricated. Detailed equipment specifications and requirements will be provided once available. Appendix --- provides generalized equipment data and requirements based on existing equipment of a similar nature and preliminary equipment manufacturer inputs.

Exterior walls and ceiling will need to shield the radiation generated by the equipment by a combination of methods that include concrete (in-place and modular), earth barriers, and providing proper standoff distance.

Preliminary shielding requirements provided by LMTF staff are:

• 14 MeV Neutron Generator

- Perimeter Test Cell Concrete Thickness: Five (5) Feet Thick (Minimum)

- Ceiling Test Cell Concrete Thickness: Two (2) Feet Thick (Minimum)

- Neutron Activation Requirements "Test Cell": Two (2) Feet of High Density Borated

- Polyethylene will surround the Neutron Source

• ARES and FXR

- Perimeter Test Cell Concrete Thickness: Eight (8) Feet Thick (Minimum)

- Tapered Test Cell Walls (Tapered 2-3 Feet Thick Concrete)

- Ceiling Test Cell Concrete Thickness: Two (2) Feet Thick (Minimum)Personnel Area

Other laboratory requirements include:

• Non-recirculating-style air curtains on all entry points with a minimum 1000 cfm rating

• Overhead bridge crane (10 ton)

• Classified Intrusion Detection System (IDS)

• Power interlocks

• Exterior vehicular access around the laboratories

Personnel Areas

Workspaces and support areas are required for anticipated staff including private offices for managers and open workstations for staff and administration. The area requires support spaces including a break room, a workroom for printing and supplies, and IT/Telecom support.

2.2.2. Space Analysis

The objective is to deliver “right sized,” flexible, quality facilities at the lowest life cycle cost basis to support the mission for the identified full-time equivalent (FTE) count of 20, in lieu of a of a final USAF Unit Manpower Document (UMD) for the facility. Although the identified CATCODE 310924 is not specified in AFMAN 32-1084, known instructions for administrative and personnel standards have been applied below in accordance with AFMAN 32-1084, AFI 38- 201, and DAFI 36-3013

Space Type – Personnel Area Staff Area (NSF) Remarks

Wing Commander Office

E-WCO-350

1 341 1 space, 1 person per space

Group Commander Office

E-GCO-250

1 240 1 space, 1 person per space

Commander Offices

E-CO-150

4 570 4 spaces, 1 person per space

Staff Open Workstations

E-OA-40

20 772 20 spaces, 1 person per space

Personnel Support Spaces 1,714 Vestibule, lobby, restrooms, etc.

Total Net SF 3,637

Net to Gross % 55%

Exterior Covered Areas 0

Total Gross Square Feet (GSF) 6,614

The oil tank storage and containment room adjoining the other two wings and within the administrative wing footprint occupies 1,780 total gross square feet (GSF).

The IPT agreed in discussions amongst the various stakeholder groups that the radiation effects laboratories in the test bay wing of the building are of a unique and specialized nature and the space requirements for the identified CATCODE 310924 are not specified in AFMAN 32-1084.

Space Type – Lab Area Staff Area (NSF) Remarks

Advanced Radiation Environment

Simulator

Comm Room - 840

Test Cell - 4,580

Shielding/Buffer - 800

Screen/Control Room - 1,336

Auxiliary Room - 550

Small Flash X-Ray Replacement

Comm Room - 515

Test Cell - 980

Screen/Control Room (share with 14 MeV) - -

Auxiliary Room - 935

14 MeV Neutron Generator

Comm Room 221

Test Cell 2,950

Shielding/Buffer 400

Screen/Control Room (share with SFXR) 768

Lab Support Spaces 1,766 Loading, storage, dosimetry, conference

Total Net SF 16,641

Net to Gross % 55%

Exterior Covered Areas 0

Total Gross Square Feet (GSF) 30,257

2.2.3. Concept Sketches

See attached preliminary floor plan, concept exterior elevations, and schematic building sections.

Also included are preliminary site, grading, and utility plans; structural foundation and framing plans; mechanical and electrical power layouts; and preliminary fire alarm and fire suppression plans.

2.3. Parametric Design Analysis

See sections below by each design discipline.

2.3.1. Structural

a. Substructure General Requirements:

A geotechnical investigation for this site, report number 25004473.001A dated May 19, 2025, was conducted by Kleinfelder. Based on the information provided in this report, the structural system will be designed and detailed in accordance with the following:

• A conventional, reinforced concrete spread footing system will be used to support structural framing, precast concrete perimeter walls and cast-in-place concrete shielding walls.

• Minimum allowable bearing pressures are 3500 psf for a 2’-0” minimum width continuous footing and 4500 psf for a column footing with 2’-0” minimum dimensions in each direction.

• Minimum bottom of footing elevation at 2’-6” below finish floor/low grade.

• A reinforced concrete slab-on-ground is acceptable at this site. The slab will be designed and structurally reinforced to support forklift and other equipment traffic and will include below-ground, concrete-lined pits at some pieces of test equipment. A recessed, structurally reinforced slab on grade surrounded by reinforced concrete retaining walls will be designed to enclose the interior oil storage tank.

• The site exhibits low liquefaction potential and there will be significant cut to achieve the desired finish floor elevation.

• Some over-excavation and structural fill will be required.

• The facility will be surrounded on three sides by retaining walls of significant height. It is anticipated that the most economical retaining system at these walls will be soil nails or other tieback-type system.

• There will be large pieces of exterior mechanical and electrical equipment. It is likely that these pieces of equipment will require structurally designed foundations.

b. Superstructure and Roof General Requirements:

The roof framing for the building will consist of a concrete topping slab over a composite steel deck supported by wide flange beams. Roof framing will be supported by composite wide flange steel girders and either steel columns or load-bearing concrete walls (see below).

The purpose of the concrete topping slab at the roof deck is to enhance the diaphragm capacity of the roof structure and to reduce the potential for unacceptable vibration at the significant number of pieces of mechanical and electrical equipment. There will be two different perimeter wall types in this facility:

At the office area located on the north side of the building, the walls will consist of cold-formed steel stud curtain walls supported by structural steel framing. Around the test facility, the perimeter walls will consist of load-bearing plant-cast or tilt-up concrete insulated sandwich panels. Interior steel columns will provide intermediate support for roof framing as required.

Walls and columns will support three overhead bridge cranes.

Reinforced, cast-in-place concrete walls will be constructed within the test facility for shielding purposes. These walls will be free-standing and will cantilever up from their foundations. In some instances, these walls may provide structural support for interior building columns. In some locations the interior walls are required to be constructed of borated (i.e. boron-impregnated) concrete.

Minimum required gravity loads and lateral load criteria:

Dead Load

Actual in-place weights of all materials and equipment shown on the construction documents

Minimum Roof Live Load 20 psf

Ground Snow Load

37 psf per State of Utah amendments to IBC 2018 for elevations below 4334 feet

Floor Live Load (Mechanical Penthouse)

40 psf + weights of all equipment and support pads

Floor Live Load (Slab-on-Ground) 125 psf + forklift or other equipment loads

Partition Load 15 psf

Risk Category III

Latitude and Longitude 41.248941, -112.250482

Soil Site Class C

Spectral Acceleration Parameters Per ASCE 7-16; IBC 2021

Ss = 0.77 S1 = 0.28

Basic Wind Speed 109 mph

Seismic Design Category D

Wind Exposure Category C

There will be two different lateral load-resisting systems in this facility:

In the office area and mechanical penthouse, lateral loads will be resisted by structural steel diagonal braced frames. Diaphragms consisting of steel deck + concrete topping and steel framing will distribute lateral forces into these elements.

In the test facility, lateral loads will be resisted by the perimeter concrete wall panels. The roof diaphragm, consisting of a composite steel deck and concrete topping slab supported by structural steel framing, will distribute lateral forces into these elements.

c. Structural Modifications and Repairs:

Not applicable.

d. Seismic Design Requirements:

This facility will be designed and detailed to meet the applicable requirements for Seismic Design Category D.

The following nonstructural components may require seismic bracing:

• Storage racks, shelving and cabinets more than 6 feet tall.

• Suspended ceilings.

• Interior partitions taller than 9 feet.

• Egress stairways.

• Mechanical and electrical equipment not mechanically attached to structural support framing.

• Piping and ductwork including fire protection systems unless otherwise exempted per

ASCE 7-16.

• Electrical conduit and cable trays unless otherwise exempted per ASCE 7-16.

e. Structural Antiterrorism Requirements

At the present time this facility has not been assigned a Design Basis Threat per UFC 4-020-01.

Therefore, the design and detailing of this facility will be in accordance with UFC 4-010-01 – DoD Minimum Antiterrorism Standards for Buildings. These standards reference UFC 4-023-03

– Design of Buildings to Resist Progressive Collapse as augmented by ASCE 41 – Seismic

Evaluation and Retrofit of Existing Buildings if applicable.

Thickness of horizontal diaphragms, thickness and reinforcing of concrete walls, foundations, topping slabs, etc., sizes of structural steel framing, and connections among the structural components will be as required in UFC 4-010-01 and referenced documents, as applicable.

f. Special Structural Requirements:

There will be three bridge cranes housed in this facility. The supporting framing for the cranes will be freestanding but will be braced by the structural framing and walls.

Serviceability criteria including vibration limitations or facility movement tolerances have not yet been identified.

2.3.2. Architectural

General Building/Property Data

Construction Type: 2B

Occupancy, Use: B Business, F-1 General industrial, H-3 High Hazard Industrial/Storage;

Business and Industrial

Height: 34’ Actual Building Height (55’ Allowable)

Area Separation: >30’ (All Directions)

Building Area: 38,651 square feet (69,000 square feet Allowable Area Factor)

Sprinklered: Automatic Fire Sprinklers Throughout

Hazard Classification: Light Hazard (UFC 3-600-01)

a. Exterior Enclosure and Roofing

The building envelope will meet the requirements of the 2021 IECC Energy Code which, based on Table C402.1.3 for Climate Zone 5, requires continuous insulation minimum R-30ci entirely above the roof deck, R-11.4ci along mass walls (high bay wing), R-13 + R-10ci along metal framed walls (office wing), and R-15 perimeter insulation for 36” below unheated floor slabs.

The high bay wing assumes a 6” concrete slab and the office wing a 4” slab.

Metal studs with batt insulation and insulated metal panels are proposed for the exterior walls of the office wing. The high bay exterior walls are precast concrete sandwich panels consisting of a structural interior wythe, rigid insulation, and an exterior architectural wythe. Separate flat roofs with parapet walls are identified over the office wing, mechanical bulkhead, and the high bay wing. Thermal polyolefin (TPO) single ply roof membranes fully adhered over cover board and R-30 rigid insulation are proposed over the metal roof decking.

Under Air Force Corporate Facility Standards (AFCFS), the facility is considered Facility Group 3 Industrial. Therefore, understated functional and economical materials and exterior aesthetics are identified, particularly for the high bay wing. The open administrative wing incorporates large curtain wall openings with low E glazing and integral shade structures as well as smaller storefront window openings with low E glazing and painted steel shadow box shade structures.

The exterior doors at the open administrative wing include low e glass storefront doors for the entrance and vestibule along with hollow metal (HM) exit only doors. The exterior doors at the lab high bay include monumental, insulated doors for equipment access at the loading area and hollow metal insulated exit only doors. Exterior glazing requires a U-value of 0.30 or better in accordance with ASHRAE 90.1 requirements for Climate Zone 5 for Ogden, Utah.

b. Interior Construction, Stairs, and Finishes

The interior construction of the open administrative wing consists generally of interior partition walls to the structural deck with painted gypsum wall board finish, suspended acoustic ceiling tile system, and wood doors with HM frames. The finish flooring is carpet tile in the offices and conference room; ceramic tile in the lobby, vestibule, and restrooms; and luxury vinyl tile (LVT) in the breakroom. Conference room partition walls are to be constructed to meet sound transmission class STC 50 with STC 50 doors as well. The restroom walls are to receive ceramic tile finish floor to ceiling. The restrooms and vestibule ceilings are to be painted gypsum board in lieu of acoustic ceiling tile. The vestibule finish floor will incorporate a recessed entrance walk off mat.

The structure of the test bay wing is higher to provide the necessary space for bridge cranes and 16 feet-minimum clear height throughout for working/testing purposes. The interior construction of the test bay wing includes sound-rated STC partition walls with painted gypsum board wall finish to the structural deck at the SAPF perimeter walls and interior partition walls to intermediate heights with painted gypsum board ceilings between adjacent SAPF spaces. The test bay floor finish is industrial vinyl tile with the identified electrical and communication rooms to include electrostatic dissipative properties. Equipment areas will not receive finish flooring over the radio frequency (RF)-shielded concrete slab.

c. Accessibility:

The facility is anticipated to accommodate occupants with varying levels of ability to access and, therefore, is designed to be fully accessible in compliance with ANSI A117.1, relevant provisions of the Americans with Disabilities Act (ADA), the Architectural Barriers Act (ABA), and other governing codes and reference standards, except where such compliance is explicitly permitted to be exempted for limited access equipment and operational areas.

d. Secure Compartmented Information Facility (SCIF)

The high-bay wing is designed to be entirely an open storage sensitive compartmented information facility (SCIF) with dedicated special access program facility (SAPF) spaces within, including a conference room with STC-50 minimum walls/doors. One controlled access door with integrated classified intrusion detection system and access control is provided between the open administrative wing and the High-Bay SCIF.

The exterior equipment access doors are identified as monumental radio frequency (RF)-shielded doors and, along with the exit-only doors, are anticipated to be required to meet an STC-50 minimum rating. There are no exterior windows in the high bay wing. The wall, floor, and roof construction are required to be RF-shielded and sound-rated. Other exterior penetrations of the secure boundary for incoming mechanical ductwork and other infrastructure shall be protected, sound-rated, man-proofed, and filtered on the interior side.

Each of the test cells for the primary pieces of test equipment (ARES, FXR, and 14MeV Neutron Generator) and the associated support spaces comprise individual SAPF program spaces that will be isolated in accordance with Intelligence Community Directive (ICD) 705 and IC Tech Spec (ICS) 705 for Sensitive Compartmented Information Facilities. The sound rating requirements for the interior SAPF program space partition walls and doors will be determined once preliminary program security classification levels are identified. Penetrations into the interior SAPF program spaces from the flexible area shall be protected, sound-rated, man-proofed, and filtered on the interior side

e. State Historical Preservation Office Review

USAF received concurrence from State Historical Preservation Office Review (SHPO) under Section 106 of the National Historic Preservation Action (NHPA) on March 18, 2025 that the proposed action would have “no adverse effect”.

f. Installation Facility Standards:

The facility is designed in accordance with the Hill Air Force Base Installation Facility Standards (IFS). No additional unique, local requirements are identified.

2.3.3. Services

a. Conveying:

No conveying systems are anticipated to be required.

b. Process Utilities:

Clean Dry Air (CDA)

Clean dry compressed air (CDA) for the facility will be generated from an oil free air cooled compressor and refrigerated air dryer (35 °F dewpoint). Clean dry compressed air (CDA) will be a separate and independent system from the house compressed air system (HCA). CDA delivery pressure is planned to be approximately 145 psig. A receiver tank will be installed downstream of the dryer. Clean dry compressed air (CDA) is anticipated to be utilized for ultra-clean equipment requirements.

Compressed air distribution will be routed alongside the process chilled water for distribution to the Test Cells. Branch compressed air lines will enter each Test Cell and terminate with an isolation valve for future connection to test equipment. All compressed air piping will be "Cleaned and Capped/Packaged for Oxygen Service" for compressed dry air (CDA) systems in accordance with ASTM G93.

The following allowances have been made for CDA air distribution drops for flexibility.

Room Number

Room

Name

No.

Drops

SCFM

/ Drop Total (SCFM)

- SFXR 2 10 20

- SFXR 2 10 20

- 14MeV 4 10 40

- ARES 4 10 40

- FLEX 4 10 40

Total Connected 16 160

% Use Factor 30%

Nominal Demand 50 SCFM at

145 psig

Gaseous Nitrogen

Gaseous nitrogen has been identified to be required for the Test Cells. A liquid nitrogen storage tank is planned to be installed on the exterior of the facility with ambient air vaporizer fed from the liquid storage tank. Main nitrogen distribution piping will be routed through the mechanical room, paralleling the compressed air distribution.

The following allowances have been made for gaseous nitrogen distribution drops for flexibility.

Room Number

Room

Name

No.

Drops

- SFXR 5 10 50

- 14MeV 9 10 90

- ARES 10 10 100

- FLEX 14 10 140

Total Connected 43 430

Nominal Demand 130

Spaces with nitrogen drops will be provided with oxygen monitoring to alarm in the event of a leak.

House Compressed Air

House compressed air for the facility will be generated from an oil lubricated air cooled compressor and refrigerated air dryer (35 °F dewpoint). House compressed air (HDA) will be a separate and independent compressed air system from the clean dry compressed air system (CDA). HDA delivery pressure is planned to be approximately 145 psig. A receiver tank will be installed downstream of the dryer. House compressed air is anticipated to be utilized for air driven tools/equipment where some entrained oil in the airstream is advantageous from a lubrication perspective.

House compressed air distribution will be routed alongside the process chilled water for distribution to the Test Cells. Branch compressed air lines will enter each Test Cell and terminate with an isolation valve for future connection to test equipment.

The following allowances have been made for house compressed air distribution drops for flexibility.

Room Number

Room

Name

No.

Drops

- 14MeV 9 10 90

- ARES 10 10 100

- FLEX 14 10 140

Total Connected 43 430

Nominal Demand 130

Oil Transfer Pumps (ARES)

Oil transfer pumps between the ARES Test Equipment and Indoor Oil Storage Tank will be provided with N+1 redundancy. Another set of transfer pumps from the Indoor Oil Storage Tank to the ARES Test Equipment will also be provided.

c. Plumbing:

Process Chilled Water

Process chilled water is identified to be required to support the testing equipment. A plate and frame heat exchanger will be located in the mechanical room, with the source of cooling being the building chiller plant. Process chilled water supply temperature is pre-conceptually planned as 65 °F, with a 10 °F rise. The Test Cells each are identified to require a minimum of 40 psig of process chilled water.

There are may different ways to control the process water heat exchangers, The initial design concept is to use constant flow (variable temperature) on the process side of the heat exchanger.

The process side of the heat exchanger would only have an open/close two way control valve.

The chilled water side of the heat exchanger would use variable flow through a fully modulating two-way control valve. The chilled water modulating two-way control valve would be controlled by the process water temperature setpoint as determined by a temperature senso in the process water piping.

Process chilled water mains will be routed from the mechanical room to the Test Cells and Flex Area. Piping will enter the Test Cells and be terminated with valves and tees for future extension to test equipment. Process chilled water pumps will be variable speed, and a pressure bypass/minimum flow valve should be considered based upon the operating characteristics of the process chilled water pumps.

Although only one process chilled water drop has been identified as being required for each Test Cell, for flexibility, additional drops are allowed in each Test Cell and in the Flex Area.

Process Chilled Water (continued)

Room

Number

Room

Name No. Drops

GPM

/ Drop

Diff.

Pressure

(psig)

Total

(GPM)

- SFXR 2 2 40 4

- SFXR 2 2 40 4

- 14MeV 4 2 40 8

- ARES 1 40 40 40

- FLEX 4 2 40 8

Total 9 56

Domestic Cold Water

The domestic water service will enter the facility through the water service entrance room on the ground level in the High-Bay Laboratory Area of the building. A bronze mesh strainer and reduced pressure principal backflow preventer (RPPBFP) will protect the entrance before connecting to a pressure reducing valve (PRV) station (if needed) with bypass in a vertical position, hose bib and water meter with pulse initiator contacts before any distribution to other services will be provided.

Due to preliminary low domestic water pressures (30 to 40 psi preliminary water pressure readings), a domestic booster pump located in the water service entrance room may be required.

Further investigation is required on existing domestic water pressure availability.

The building domestic water entrance will be metered and tied to the Energy Management Control System (EMCS)/Building Automation System (BAS). Additionally, all non-potable water utilized for hydronic system make up water will be separately metered and connected to the EMCS.

Domestic cold water will be extended to building fixtures and wall hydrants. Freeze proof wall hydrants will be provided at approximately 75-foot intervals along the building exterior, located such that hoses will not cross the main or front entryways.

Domestic Hot Water

Domestic hot water service is limited to two restroom groups and two shower heads. Hot water is planned to be generated by natural gas-fired hot water heaters in the second floor Mechanical Penthouse.

Non-Potable Water

Non-potable water will originate from the domestic water service in water service entrance room and will be protected with a dedicated reduced pressure principal backflow preventer (RPPBFP).

Non-potable water will be distributed for make-up water requirements for the HVAC heating water system, HVAC chilled water system, process cooling water system, and the chilled beam cooling loop.

Sanitary Waste and Vent

Below grade sanitary sewer, will be PVC, AWWA C900, Class 150. Interior (Above Grade) sanitary sewer, waste and vent piping below floor will be cast iron. Vent piping through roof in the administrative (office) area will be sized in accordance with the Plumbing Code requirements. No plumbing fixtures or water closets are currently planned for the High-Bay Laboratory Area of the LMTF facility. No floor drains will be provided in the High-Bay Laboratory Area of the LMTF facility.

All plumbing fixtures will be connected to the building sanitary sewer and vent system. All fixture connections will be trapped and vented with vents routed to termination above the roof level. Floor sinks and floor drains located in the mechanical rooms will be served by waterless trap guard assemblies. Floor sinks in mechanical rooms will be 4” and have 3/4 grates. Floor drains will be provided in all other areas with full grates.

Test Cell requirements for sanitary sewer piping or drain service piping have not been currently identified. Secondary containment of 20 minutes of fire protection discharge water is required by the UFC for spaces housing Class IIIA liquids. See Fire Protection section of this document for additional fire water tank discussion.

Process Waste and Vent

No special process waste and vent systems have been identified for this facility.

Natural Gas Distribution

Natural gas will be extended from existing site distribution. The service will consist of an isolation valve, gas regulator sized for regulating entering service gas pressure to 2.0 psig, dirt leg, isolation valve, gas meter and isolation valve. The gas regulator will include high pressure cut-off and manual reset low pressure cutoff.

The natural gas entrance will be brought into the mechanical room. An exterior gas pressure regulator at the building will regulate gas pressure from 2 psig to 7-11” w.c. and include high pressure cut-off, manual reset low pressure cutoff. The natural gas service meter will be provided with pulser contacts for connection to the EMCS.

d. HVAC Systems:

UFC 3-410-01 and HAFB (Hill Air Force Base) Facility Design Standards require use of a Dedicated Outside Air System (DOAS) for ventilation purposes for Air Force projects when the sum of all ventilation air into a facility is greater than 750 CFM and the 1% occurrence humidity ratio is above the inside cooling load design dew point of 44.14 °F. The 1% dehumidification humidity ratio for Ogden Utah (Hill Air Force Base) is a dewpoint of 55.45 °F. Because the 1% dehumidification dewpoint (55.45 °F) exceeds the inside cooling load design dewpoint (44.14 °F), a DOAS type system is required for this facility.

The following systems form the basis for the new Radiation Facility pre-conceptual design report and opinion of probable construction cost:

Office Area: DOAS Ventilation coupled with Active Chilled Beams for Heating and Cooling

Test Cell Area: Dedicated 100% Outside Air Make Up Air Unit for Heating and Cooling and 100% HEPA Filtered Exhaust

Test Cell Support Area: DOAS Ventilation coupled with Four Pipe Fan Coil Units (HVAC Chilled Water and HVAC Heating Water)

Cobalt Storage: Dedicated 100% Outside Air Make Up Air Unit for Heating and Cooling and 100% HEPA Filtered Exhaust

Tritium Storage: Dedicated 100% Outside Air Make Up Air Unit for Heating and Cooling and 100% HEPA Filtered Exhaust

Chilled Water Source: Air-Cooled Variable Speed Outdoor Chillers with Variable Speed Chilled Water Pumps

Chilled Water Fluid: 40% Propylene Glycol and 60% Water Mix (Freeze Protection down to -10°F)

HVAC Heating Water: Indoor Natural Gas Fired Hot Water Boilers Variable Speed Heating Water Pumps

HVAC Heating Water Fluid: 40% Propylene Glycol and 60% Water Mix (Freeze Protection down to -10°F)

HVAC Heating Boilers, Chilled Water Pumps, HVAC Heating Water Pumps, Air Compressor, Process Cooling Heat Exchangers, and Domestic Water Heaters will be located in a Mechanical Penthouse on the second floor of the facility above the Administrative (Office – Non Secure) area of the building. All heating and cooling equipment in the Mechanical Penthouse will be provided with N+1 redundancy.

All HVAC ductwork penetrating the roof into the Test Cell Area of the building will be provided with security bars, Z-ducts, non-conductive breaks, and RFI Shielding in the ductwork per UFC 4-010-05 Unified Facilities Criteria (UFC) - .SCIF/SAPF Planning, Design, and Construction (May 2023 Edition) and ICD/ICS 705 - Technical Specifications for Construction and Management of Sensitive Compartmented Information Facilities (March 2020 Edition).

Air Handlers for the Office Area and Test Cell Areas of the building will be located exposed on the roof. The design concept was not place any rooftop mechanical equipment directly above the Test Cell Area of the High Bay Laboratory Area of the building.

HVAC Chilled Water and HVAC Heating Water will be routed above the roof to the air handling units from the mechanical…