ML24319A235

NAC International - Enclosure 1: Shielded Devices RAI Responses NAC-OPTIMUS-L SAR, Revision 24B

ML24319A235
Person / Time
Site:	OPTIMUS-L
Issue date:	11/14/2024
From:	NAC International
To:	Office of Nuclear Material Safety and Safeguards
Shared Package
ML24319A233	List: ML24319A234 ML24319A235
References
ED20240148
Download: ML24319A235 (1)

Text

Atlanta Corporate Headquarters: 2 Sun Court, Suite 220, Peachtree Corners, Georgia 30092 USA Phone 770-447-1144, www.nacintl.com November 2024 Docket No. 71-9390 OPTIMUS-L (OPTImal Modular Universal Shipping Cask)

SAFETY ANALYSIS REPORT Shielded Devices RAI Responses NON-PROPRIETARY VERSION Revision 24B to ED20240148 Page 1 of 16 Shielded Devices RAI Responses NAC-OPTIMUS-L SAR, Revision 24B November 2024

NAC INTERNATIONAL OPTIMUS-L Page 2 of 16 NAC INTERNATIONAL PROPRIETARY RESPONSES TO THE NUCLEAR REGULATORY COMMISSION OCTOBER 11, 2024 REQUEST FOR ADDITIONAL INFORMATION FOR REVIEW OF THE NAC INTERNATIONAL OPTIMUS-L PACKAGE November 2024

NAC INTERNATIONAL OPTIMUS-L Page 3 of 16 TABLE OF CONTENTS Page STRUCTURAL AND MATERIALS EVALUATION................................................................................ 5 THERMAL EVALUATION...................................................................................................................... 11 CONTAINMENT EVALUATION............................................................................................................ 16

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L Page 4 of 16 SECTION A NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION PROPRIETARY RESPONSES

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L Page 5 of 16 NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION STRUCTURAL AND MATERIALS EVALUATION 2-1 Demonstrate that the material properties of the Celotex material compare favorably with the results of simulations that were performed at different strain-rates that were expected during the required regulatory drop. Alternatively, provide simulations that show the performance of the material model with other strain-rates over a range that encompasses the anticipated strain-rates during a drop.

The applicant acknowledged that the Celotex material properties are strain-rate dependent and has performed LS-DYNA simulations with a material model that control the performance of the Celotex material in simulated drop tests using a strain rate of 50 in/in/sec. The Celotex performs as a shock absorber reducing the effect of the impact, maintaining the safety of the package without unacceptable release of contents. As such, staff seeks confirmation that the model will be able to simulate a material response at strain-rates that will be achieved during an actual impact.

This information is required to determine compliance with 10 CFR 71.71(c)(7) and 71.73 (c)(1).

NAC International Response to RAI 2.1:

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L Page 6 of 16 Summary of Changes:

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L Page 7 of 16 NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION STRUCTURAL AND MATERIALS EVALUATION 2-2 Explain how the Celotex material properties associated with the different strain-rates are modeled in LS-DYNA to be able to adequately capture the full range of the Celotex response over the duration of the deceleration of a regulatory drop impact.

The finite element code LS-DYNA is used to develop the material model in the simulation of the drop. Since the properties of Celotex are expected to vary at different strain-rates, the staff needs assurance that this behavior is adequately modeled and that a realistic material model can capture the physical response of the Celotex and correctly represent the safety performance of the package.

This information is required to determine compliance with 10 CFR 71.71(c)(7) and 10 CFR 71.73 (c)(1).

NAC International Response to RAI 2-2:

Summary of Changes:

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L Page 8 of 16 NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION STRUCTURAL AND MATERIALS EVALUATION 2-3 Provide the confined test material properties of Celotex.

The staff notes that the Celotex used in the packaging is under confined conditions, constrained by the canister, while the material test results available followed an unconfined test protocol. The staff also notes that the safety performance of the Celotex to limit impact with the canister shell is impacted by the performance of the Celotex under confined conditions and that the packaging material will be under confined conditions during impact (the protective shell over the foam).

The applicant needs to provides the material properties used in the material model effected by confinement as well as an assessment of this effect on the impact loading of the Celotex This information is required to determine compliance with 10 CFR 71.71(c)(7) and 10 CFR 71.73 (c)(1).

NAC International Response to RAI 2-3:

Summary of Changes:

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L Page 9 of 16 NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION STRUCTURAL AND MATERIALS EVALUATION 2-4 Provide a table comparing the impact loads from drops on the CCV to those from the referenced OPTIMUS -L calculations.

The applicant has stated that the stresses in the containment canister vessel (CCV) is lower than those in the OPTIMUS-L approved cask design. However, the applicant has not justified that the impact loads from the new payload do not exceed the stresses in the approved cask design. The comparison table is intended to verify that the approved cask design envelopes the loads from the new payload and that safety is maintained.

In addition, SAR section 4.2.3 and section 4.3.3 refer to section 2.6 and section 2.7 when stating there is no loss or dispersal of radioactive contents during NCT and HAC, but this does not address the current amendments content and structural analysis of section 2.12.

This information is required to determine compliance with 10 CFR 71.71(c)(7) and 71.73 (c)(1).

NAC International Response to RAI 2-4:

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L Page 10 of 16 Summary of Changes

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L Page 11 of 16 NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION THERMAL EVALUATION 3-1 Explain and clarify that the thermal models thermal properties (e.g., thermal conductivity, maximum allowable temperature during NCT and HAC) of the packages fiberboard insert material described in the SAR (e.g., section 3.5.4.1 of the application, table 3.5.4-1 of the application) are the same as provided in the report titled Celotex Structural Properties Tests (document WSRC-TR-20000-00444).

Section 2.12.6.3 of the application indicated that the packages fiberboard is consistent with the fiberboard (with density of 19.1 lb/ft3) tested in the Celotex Structural Properties Tests report (SAR chapter 2, reference 2.32). However, section 2.12.6.3.1, section 8.1.5.3, and drawing 70000.14-095 of the application specify that the package fiberboard has a density between 14 lb/ft3 and 16 lb/ft3 and there was no explanation that thermal properties (e.g., thermal conductivity, maximum allowable temperature) would not change with a different fiberboard density.

This information is needed to determine compliance with 10 CFR 71.35.

NAC International Response to RAI 3-1:

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L Page 12 of 16 Summary of Changes:

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L Page 13 of 16 NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION THERMAL EVALUATION 3-2 Clarify that the dunnage within the SDIA and CCV will have maximum allowable temperatures greater than the calculated temperatures provided in section 3.5.4 of the application.

Section 1.2.2.4 of the application noted that the free space between the Shielded Device and the radial wall of the SDIA will have dunnage to limit movement of the Shielded Device during transport. The materials associated with dunnage were not included and, therefore, it is uncertain whether the materials have allowable temperatures greater than or equal to the 300 °F temperature listed in section 1.2.1.5, or the temperatures reported in table 3.5.4-1 of the application.

This information is needed to determine compliance with 10 CFR 71.35.

NAC International Response to RAI 3-2:

Summary of Changes:

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L Page 14 of 16 NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION THERMAL EVALUATION 3-3 Clarify the effects (e.g., hydrogen concentration, MNOP and HAC pressure within the CCV) of flammable gas generation from radiolysis or thermolysis due to the presence of the polyvinyl alcohol (PVA) glue and fiberboard materials, which is a component of the SDIA and potential dunnage.

Section 2.12.6.2.1 of the application indicated that polyvinyl alcohol (PVA) is used during the fiberboard construction. Although section 2.12.6.2.2 of the application said there were no known mechanisms for reaction of the fiberboard/PVA with other components, it did not address the potential for radiolysis and thermal degradation of the PVA, which could result in flammable gas (e.g., hydrogen) accumulation and higher pressures within the CCV containment boundary (e.g. undefined pressure analysis for this content). For example, NUREG/CR-6673 noted that PVA has a G(H2) value of 3.1 for gamma radiation.

This information is needed to determine compliance with 10 CFR 71.43(d).

NAC International Response to RAI 3-3:

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L Page 15 of 16 Summary of Changes:

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L Page 16 of 16 NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION CONTAINMENT EVALUATION 4-1 Provide the radionuclides and activity of the content within the sealed sources in order to define the content that would be transported. Confirm that the sealed sources have a corresponding DOT certificate.

Section 1.2.2.4 of the application indicated that the amendments proposed content includes sealed sources that are not limited to listed devices. Although table 5.5-10 of the application included some descriptions of listed source content, these details were not included in the Shielded Device Restrictions provided in section 1.2.2.4. In addition, section 5.5.4 mentioned that the analyzed sources were described as generic devices and sample devices, indicating there can be undefined content (e.g., radionuclides, activities).

This information is needed to determine compliance with 10 CFR 71.33.

NAC International Response to RAI 4-1:

Summary of Changes:

to ED20240148 Page 1 of 3 Page 1 of 3 Proposed Changes for Certificate of Compliance Revision 4 No. 71-9390 for OPTIMUS-L Shielded Devices RAI Responses NAC-OPTIMUS-L SAR, Revision 24B November 2024 to ED20240148 Page 2 of 3 Page 2 of 3 CoC Sections (revised)

CoC Page 2 of 7 5.(a)(3)

Drawings (continued) 70000.14-L502, Rev 1P Packaging Assembly OPTIMUS-L 70000.14-L595, Rev 1P Shielded Device Insert Assembly, OPTIMUS-L CoC Sections (new)

CoC Page 3 of 7 5.(b)(1)

Type and form of material (continued)

(vii)

Shielded Devices are shielded steel weldments containing sealed sources meeting the following specifications.

Parameter Shielded Device Maximum weight (Shielded Device) 2,200 lb. (997 kg ref.)

Maximum Content Activity (Shielded Device) 60Co - 5 Ci & 137Cs - 2800 Ci Maximum Surface Dose Rate (Shielded Device) 100 mrem/hr Maximum Dimensions Height 40 in. (101.6 cm ref.)

Diameter 14 in. excluding beam port, if present (35.56 cm ref.)

to ED20240148 Page 3 of 3 Page 3 of 3 CoC Page 6 of 7 5.(b)(2)

Maximum quantity of material per package (continued)

(ix)

For Shielded Devices, as described in Item 5.(b)(1)(vii):

Shielded Devices, contents, are limited to special and normal form sealed source content. The Shielded Device Insert Assembly is configured in the CCV cavity for transportation, shown General Arrangement Drawing 70000.14-L595. The insert consists of two (2) axial aluminum spacers, placed at the bottom and top of the configuration, with cellulosic fiberboard radial insert situated between the axial spacers.

CoC Page 6 of 7 5.(c)

Criticality Safety Index For, 5.(b)(2) (ix) Shielded Devices 0.0 to ED20240148 Page 1 of 2 List of Calculations Shielded Devices RAI Responses NAC-OPTIMUS-L SAR, Revision 24B November 2024 to ED20240148 Page 2 of 2 List of Calculations

1. 70000.14-2110 Rev. 1

2. 70000.14-4102 Rev. 0

3. 70000.14-5202 Rev. 3 CALCULATIONS ARE PROPRIETARY AND WITHHELD IN THEIR ENTIRETY PER 10 CFR 2.390 to ED20240148 Page 1 of 3 List of SAR Changes Shielded Devices RAI Responses NAC-OPTIMUS-L SAR, Revision 24B November 2024 to ED20240148 Page 2 of 3 List of Changes for the OPTIMUS-L SAR, Revision 24B Chapter 1 Page 1.1-1, added text to middle of the fifth paragraph where indicated.

Page 1.2-4, added text to the end of the second paragraph in Section 1.2.1.3 where indicated.

Page 1.2-6, added text to the end of the third paragraph where indicated.

Page 1.2-14, added text to Section 1.2.2.4 where indicated.

Page 1.2-15, added second paragraph to the page where indicated.

Chapter 2 Page 2.12-62, added text in paragraph one of Section 2.12.6.2.1 where indicated.

Page 2.12-63, text flow changes.

Pages 2.12-67 and 2.12-68, modified text in Section 2.12.6.4.1 at the bottom of page 2.12-67 and the top of page 2.12-68 where indicated.

Page 2.12-78, modified Table 2.12.6-2 and added Notes where indicated.

Page 2.12-79, modified second paragraph of Section 2.12.6.5.1 where indicated.

Page 2.12-85, modified Table 2.12.6-5 and added Notes where indicated.

Chapter 3 No changes Chapter 4 Page 4i, modified Table of Contents to reflect changes within the chapter where indicated.

Page 4.2-1, added text to Section 4.2.3 where indicated.

Page 4.3-1, added text to Section 4.3.3 where indicated.

Pages 4.5-25 thru 4.5-29, added Section 4.5.6.

Pages 4.5-30 thru 4.5-31, added Section 4.5.7.

Chapter 5 Pages 5-ii thru 5-iii, modified List of Figures and List of Tables to reflect changes within the chapter where indicated.

Page 5.5-23, added a paragraph where indicated.

Page 5.5-31, added a row to the bottom of Table 5.5-17 where indicated.

Pages 5.5-34 and 5.5-35, added section 5.5.4.4.5.

Pages 5.5-36 thru 5.5-50, text flow changes.

Pages 5.5-51 thru 5.5-53, added Tables 5.5-26 thru 5.5-30 to ED20240148 Page 3 of 3 Chapter 6 No Changes Chapter 7 No changes Chapter 8 No changes to ED20240148 Page 1 of 1 List of Effective Pages and SAR Changed Pages Shielded Devices RAI Responses NAC-OPTIMUS-L SAR, Revision 24B November 2024

Atlanta Corporate Headquarters: 2 Sun Court, Suite 220, Peachtree Corners, Georgia 30092 USA Phone 770-447-1144, www.nacintl.com November 2024 Docket No. 71-9390 OPTIMUS-L (OPTImal Modular Universal Shipping Cask)

SAFETY ANALYSIS REPORT NON-PROPRIETARY VERSION Revision 24B

OPTIMUS-L Safety Analysis Report November 2024 Docket No. 71-9390 Revision 24B List of Effective Pages Page 1 of 2 Chapter 1 Page 1-i thru 1-ii............... Revision 24A Page 1-1................................. Revision 1 Page 1.1-1.......................... Revision 24B Page 1.1-2.............................. Revision 1 Page 1.2-1 thru 1.2-2.............. Revision 1 Page 1.2-3......................... Revision 24A Page 1.2-4.......................... Revision 24B Page 1.2-5......................... Revision 24A Page 1.2-6.......................... Revision 24B Page 1.2-7 thru 1.2-13....... Revision 24A Page 1.2-14 thru 1.2-15...... Revision 24B Page 1.2-16 thru 1.2-21..... Revision 24A Page 1.3-1 thru 1.3-4......... Revision 24A 15 drawings (see Section 1.3)

Chapter 2 Page 2-i.................................. Revision 1 Page 2-ii............................ Revision 24A Page 2-iii................................ Revision 1 Page 2-iv thru 2-v.............. Revision 24A Page 2-vi................................ Revision 1 Page 2-vii.......................... Revision 24A Page 2-1............................ Revision 24A Page 2.1-1 thru 2.1-20............ Revision 1 Page 2.2-1 thru 2.2-11............ Revision 1 Page 2.3-1 thru 2.3-4.............. Revision 1 Page 2.4-1.............................. Revision 1 Page 2.5-1 thru 2.5-14............ Revision 1 Page 2.6-1 thru 2.6-37............ Revision 1 Page 2.7-1 thru 2.7-52............ Revision 1 Page 2.8-1.............................. Revision 1 Page 2.9-1.............................. Revision 1 Page 2.10-1............................ Revision 1 Page 2.11-1............................ Revision 1 Page 2.12-1 thru 2.12-2.......... Revision 1 Page 2.12-3....................... Revision 24A Page 2.12-4 thru 2.12-57........ Revision 1 Page 2.12-58 thru 2.12-61. Revision 24A Page 2.12-62 thru 2.12-63.. Revision 24B Page 2.12-64 thru 2.12-66. Revision 24A Page 2.12-67 thru 2.12-68.. Revision 24B Page 2.12-69 thru 2.12-77. Revision 24A Page 2.12-78 thru 2.12-79.. Revision 24B Page 2.12-80 thru 2.12-84. Revision 24A Page 2.12-85...................... Revision 24B Chapter 3 Page 3-i thru 3-iii.............. Revision 24A Page 3-1............................ Revision 24A Page 3.1-1 thru 3.1-5.............. Revision 1 Page 3.2-1 thru 3.2-5.............. Revision 1 Page 3.3-1 thru 3.3-20............ Revision 1 Page 3.4-1 thru 3.4-18............ Revision 1 Page 3.5-1.............................. Revision 1 Page 3.5-2 thru 3.5-15....... Revision 24A Chapter 4 Page 4-i.............................. Revision 24B Page 4-ii................................. Revision 1 Page 4-1................................. Revision 1 Page 4.1-1 thru 4.1-3.............. Revision 1 Page 4.2-1.......................... Revision 24B Page 4.3-1.......................... Revision 24B Page 4.4-1.............................. Revision 1 Page 4.5-1 thru 4.5-24............ Revision 1 Page 4.5-25 thru 4.5-31...... Revision 24B Chapter 5 Page 5-i............................. Revision 24A Page 5-ii thru 5-iii.............. Revision 24B Page 5-1............................ Revision 24A Page 5.1-1.............................. Revision 1 Page 5.1-2......................... Revision 23D Page 5.1-3.............................. Revision 1 Page 5.1-4......................... Revision 23D Page 5.2-1 thru 5.2-4.............. Revision 1 Page 5.3-1 thru 5.3-8.............. Revision 1 Page 5.4-1 thru 5.4-14............ Revision 1 Page 5.5-1......................... Revision 24A Page 5.5-2 thru 5.5-11............ Revision 1 Page 5.5-12 thru 5.5-13..... Revision 23D Page 5.5-14 thru 5.5-22..... Revision 24A Page 5.5-23........................ Revision 24B Page 5.5-24 thru 5.5-30..... Revision 24A Page 5.5-31........................ Revision 24B Page 5.5-32 thru 5.5-33..... Revision 24A Page 5.5-34 thru 5.5-53...... Revision 24B

OPTIMUS-L Safety Analysis Report November 2024 Docket No. 71-9390 Revision 24B List of Effective Pages (contd)

Page 2 of 2 Chapter 6 Page 6-i thru 6-vii.................. Revision 1 Page 6-1................................. Revision 1 Page 6.1-1 thru 6.1-2.............. Revision 1 Page 6.2-1 thru 6.2-4.............. Revision 1 Page 6.3-1 thru 6.3-23............ Revision 1 Page 6.4-1 thru 6.4-15............ Revision 1 Page 6.5-1 thru 6.5-18............ Revision 1 Page 6.6-1 thru 6.6-20............ Revision 1 Page 6.7-1.............................. Revision 1 Page 6.8-1 thru 6.8-20............ Revision 1 Page 6.9-1.............................. Revision 1 Page 6.9.1-1 thru 6.9.1-2........ Revision 1 Page 6.9.2-1 thru 6.9.2-2........ Revision 1 Page 6.9.3-1 thru 6.9.3-19...... Revision 1 Page 6.9.4-1........................... Revision 1 Page 6.9.5-1........................... Revision 1 Page 6.9.6-1........................... Revision 1 Page 6.9.7-1........................... Revision 1 Page 6.9.8-1 thru 6.9.8-7........ Revision 1 Page 6.10-1 thru 6.10-2.......... Revision 1 Chapter 7 Page 7-i.................................. Revision 1 Page 7-1 thru 7-3.................... Revision 1 Page 7.1-1 thru 7.1-2.............. Revision 1 Page 7.1-3 thru 7.1-5......... Revision 24A Page 7.2-1 thru 7.2-2.............. Revision 1 Page 7.3-1 thru 7.3-2.............. Revision 1 Page 7.4-1.............................. Revision 1 Page 7.5-1 thru 7.5-2.............. Revision 1 Page 7.5-3 thru 7.5-17....... Revision 23D Page 7.5-18 thru 7.5-24.......... Revision 1 Chapter 8 Page 8-i thru 8-ii.................... Revision 1 Page 8-1................................. Revision 1 Page 8.1-1 thru 8.1-3.............. Revision 1 Page 8.1-4......................... Revision 24A Page 8.1-5.............................. Revision 1 Page 8.2-1 thru 8.2-6.............. Revision 1 Page 8.2-7......................... Revision 24A Page 8.2-8.............................. Revision 1 Page 8.3-1......................... Revision 24A

OPTIMUS-L Package SAR Docket No. 71-9390 November 2024 Revision 24B NAC International 1.1-1 1.1 Introduction The OPTIMUS-L packaging is designated as Type B(U)F per 10 CFR 71.4. The package contents include Type B quantities of normal form transuranic (TRU) waste and fuel waste material. The packaging is classified as Category I in accordance with Regulatory Guide 7.11

[1.1]. The package is designed to be transported by highway, rail sea, and air. (Transportation by air is authorized for packages (except items specifically prohibited for air transport, e.g.,

fissile material)). The consignor must ship the package under exclusive use controls. The Maximum Normal Operating Pressure (MNOP) of the package is 100 psig (690 kPa).

The packaging, described in greater detail in Section 1.2.1, consists of a Cask Containment Vessel (CCV), a CCV bottom support plate, and an Outer Packaging (OP) assembly, as shown in Figure 1.1-1. The CCV is a stainless steel vessel with a bolted closure designed to provide leaktight containment in accordance with the criterion of ANSI N14.5-2014 [1.2]. The CCV bottom support plate (not shown in Figure 1.1-1) is a free-standing carbon steel plate that is positioned at the bottom end of the CCV cavity below the contents. The OP consists of a base and lid bolted together to fully encase the CCV. The OP is designed to crush and absorb the impact energy when subjected to NCT free drop and HAC free drop tests, thereby limiting the loads imparted to the CCV. The OP also insulates the CCV from the direct effects of the fire during the HAC thermal test.

The packaging may be configured with a Shield Insert Assembly (SIA) inside the CCV cavity for contents requiring additional shielding to demonstrate compliance with dose rate limits. SIAs used in the OPTIMUS-L packaging are provided in 1-inch and 21/4-inch thicknesses. The SIA is a painted carbon steel open-top container for additional shielding for dose rates on the side and bottom of the package.

The packaging is configured with the GEO basket assembly inside the CCV cavity when used to transport unirradiated TRI-structural ISOtropic (TRISO) fuel particle compact (i.e., TRISO compact) contents. In this configuration, the CCV bottom support plate is not included.

The packaging may be configured with a Shielded Device Insert Assembly (SDIA) inside the CCV cavity to transport shielded devices containing special and normal form sealed source content. Sealed sources are not credited for containment. Containment for the Shielded Device Insert Assembly with Shielded device content shall be the OPTIMUS-L CCV. The CCV Bottom Support Plate is not used in this configuration.

SAR demonstrates the packaging meets the applicable requirements of 10 CFR 71. The basis for qualification is the safety analysis contained herein. The package is shown to comply with the external temperature limits of 10 CFR 71.43 and external radiation standards of 0 CFR 71.47(b),

10 CFR 71.51(a)(1) and 10 CFR 71.51(a)(2).

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 1.2-4 1.2.1.1 Overall Dimensions and Weights The nominal outer dimensions of the OPTIMUS-L packaging, excluding the lifting lugs and tiedown arms, is 49.0 inches by 70.0-inch high which is greater than the minimum package dimension of 10 cm required by 10 CFR 71.43(a). The gross weight of the package, including the maximum CCV contents weight, is approximately 9,200 pounds.

1.2.1.2 Containment Features The containment system is formed by CCV body (cylindrical shell, bottom plate, bolt flange, and all associated welds), CCV lid and its closure bolts and containment O-ring seal, and the port cover and its closure bolts and containment O-ring seal. A detailed description of the containment system is provided in Section 4.1.

1.2.1.3 Neutron and Gamma Shielding Features Gamma shielding on the side and bottom end of the packaging is provided primarily by stainless steel plates that form the CCV and OP inner and outer shells. The polyurethane foam on the side of the OP is only credited for shielding under NCT. The packaging radial surfaces includes the CCV stainless steel shell, the OP inner shell, and a thick OP outer shell, for a combined steel thickness of 1.27 inches. In addition, the minimum side foam thickness is included in the shielding model for NCT, but not for HAC. The packaging bottom end includes the 1.5-inch thick carbon steel CCV bottom support plate (positioned at the bottom end of the CCV cavity), the CCV 1-inch thick stainless steel bottom plate, the OP inner bottom plate, the OP bottom foam cover shell, and the OP outer bottom plate, for a combined steel thickness of The packaging top end includes a thick stainless steel CCV closure lid, a OP inner top end plate, the OP top foam cover shell, and the outer end plate, for a combined steel thickness of The Shielded Devices rely on the shielding of the shielded weldments which house the sources.

Lead provides gamma shielding from the sources. The Shielded Devices are limited to exterior surface dose rates of 100 mrem/hr. Maximum radionuclide activity of the sources are limited to 2,800 Ci 137Cs and 5 Ci 60Co.

Shielding specifically for neutrons is not necessary for the specified radioactive material contents.

NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 1.2-6 Internal Supports or Positioning Features The CCV bottom support plate is a free-standing plate that is positioned at the bottom end of the CCV cavity below the contents. The CCV bottom support plate is designed to distribute the loading from the contents on the CCV bottom end plate under NCT and HAC bottom end drop conditions. The CCV bottom support plate is not required when using the 1-inch SIA or the GEO basket assembly.

The radial insert maintains the location of the Shielded Devices during routine and normal conditions of transport. The top and bottom axial spacers support and uniformly distribute the end drop loads imparted by the devices onto the base and lid of the CCV. Dunnage is placed below and above the Shielded Device to position the beam port within the Beam Port Cutout of the lower RI. The dunnage placed above and below the Shielded Device shall meet or exceed the requirements of ASTM C208 Type IV, Grade 1 cellulosic fiberboard. This dunnage shall be made from material that does not react negatively with the other packaging materials or Shielded Device contents and shall have a maximum allowable temperature of at least 250°F (121°C).

Shielded Devices with no beam port feature require the Port Spacer cut-out to be filled, either via a solid Port Spacer or a full-length lower segment.

Shoring must be placed between loose fitting contents and the CCV cavity to prevent excessive movement during transport. The shoring may be made from any material that does not react negatively with the packaging materials or contents. Shoring materials should also have a melting temperature above 300°F (149°C) to ensure shoring maintains its geometry under routine and normal conditions of transport.

Outer Packaging As shown in Figure 1.1-1, the OP consists of a body and lid, each made from foam-filled stainless steel shells. The OP has a 49.0-inch outer diameter (excluding lifting lugs and tiedown arms) and 70-inch overall height. The OP lid is secured to the OP base by high-strength steel bolts. When installed, the inner portion of the OP lid bolt flange is recessed inside the top end of the OP base bolt flange. The tight fit between the OP lid and base bolt flanges at this interface is designed to provide shear relief for the OP bolts. The OP cavity is sized to provide sufficient clearance to permit free differential thermal expansion of the CCV under all NCT and HAC conditions.

NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 1.2-14 1.2.2.4 Shielded Devices Shielded Devices are shielded steel weldments containing sealed sources. This includes, but are not limited to the below devices:

Manufacturer Device Hopewell G10-1-360 G10-2-360 G10-1-2600 G10-2-2600 G10-2-2600-BX G10-3-150-A The bounding conditions for Shielded Devices for transport within the OPTIMUS-L are the dimensions of the Shielded Device, the surface dose rate on the surface of the Shielded Device, activity of the sources, and the maximum weight of the Shielded Device. Shielded Devices bounded by these restrictions are considered allowable content within the analyzed envelope.

Shielded Device Restrictions:

1. Maximum Weight, Shielded Device: 2,200 lb. (997 kg ref.)

2. Maximum Surface Dose Rate, Shielded Device: 100 mrem/hr

3. Maximum Activity, Shielded Device: 2,800 Ci 137Cs and 5 Ci 60Co

4. Maximum Dimensions, Shielded Device:

a.

Height: 40 in. (101.6 cm ref.)

b. Diameter: 14 in. excluding beam port, if present (35.56 cm ref.)

The Shielded Device may have a beam port feature protruding radially from the main body of the Shielded Device. The beam port shall fit within the cutout of the SDIA and shall extend into the cutout section a maximum of 2.9. To reduce the effective port dimension (i.e., limiting the length the beam port extends into the cutout), the annular gap between the Shielded Devices and fiberboard sections may be filled with metal, wood, or fiberboard segments to provide a net radial compressive strength greater than or equal Free space between the Shielded Device and radial wall of the Shielded Device Insert Assembly will have dunnage to limit the movement during routine transport conditions.

Axial dunnage shall be placed below and above the Shielded Device to ensure the beam port is within the bounds of the lower insert port cutout dimensions.

NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 1.2-15 Dunnage used for transport shall have properties that meet or exceed the requirements of ASTM C208 Type IV, Grade 1 cellulosic fiberboard. All dunnage used with the Shielded Device content shall be made from material that does not react negatively with the other packaging materials or Shielded Device contents and shall have a maximum allowable temperature of at least 250°F (121°C).

If the Shielded Device does not have a beam port feature, the beam port cutout shall be filled with a dunnage of equivalent material used in the upper and lower radial spacer.

1.2.3 Special Requirements for Plutonium Plutonium contents in quantities greater than 0.74 TBq (20 Ci) must be in solid form.

1.2.4 Operational Features The packaging has no special or complex operational features. Chapter 7 describes the operational steps, including use of the packagings operational features.

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 2.12-62 2.12.6.2 Materials 2.12.6.2.1 Material Properties and Specifications 2.12.6.2.2 Chemical, Galvanic or Other Reactions The position of the shielded device is maintained by the Shielded Device Insert Assembly, which consists of cellulosic fiberboard inserts and aluminum spacer plates. The shielded devices are typically comprised of heavy lead shielding encased within a carbon steel and/or stainless steel shell with internal tungsten and stainless steel source rod/holder. The sealed source is typically fully encapsulated in stainless steel.

NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 2.12-63 Shielded devices will be handled and loaded dry and during transportation, the CCV precludes the introduction of any moisture from the environment into its cavity. The absence of water significantly reduces the potential for adverse chemical and galvanic reactions. The lead shielding in the body of the shielded device is fully encased in its steel/stainless steel weldment and cannot be affected by water, atmospheric moisture, or any of the other materials present within the CCV cavity. No mechanism for reaction between the cellulosic fiberboard/PVA adhesive and the materials of the CCV or shielded device has been identified. Therefore, no significant chemical, galvanic, or other reactions are expected between the CCV, the Shielded Device Insert Assembly, and the content (shielded device).

2.12.6.2.3 Effects of Radiation on Material The shielded devices are limited to a measured surface dose rate not to exceed 100 mrem/hr which ensures no significant fluence to any of the materials of the Shielded Device Insert Assembly. Therefore, no degradation of the Shielded Device Insert Assembly materials is expected.

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 2.12-67 applicable criteria from NUREG-6007 [2.23]. The spacer plates are evaluated for end drop condition using applicable stress criteria from ASME Code subsection NF [2.2].

2.12.6.4.1 NCT Side Drop Evaluations NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 2.12-68 NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 2.12-78 Table 2.12.6-2 Summary of CCV Force Evaluation for the NCT Side Drop Table 2.12.6-3 Accelerations for Bolt Stress Evaluation for NCT Side Drop Table 2.12.6-4 Summary of Bolt Stress Evaluation for NCT Side Drop NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 2.12-79 2.12.6.5 Hypothetical Accident Conditions The governing HAC test for the OPIMUS-L packaging containing shielded device is the free drop test. As shown in Section 7.1, peak rigid-body acceleration for the HAC bottom corner, bottom oblique, top corner, and top oblique drop orientations are significantly less than the HAC top end, bottom end, and side drop orientations. As such, the following evaluations are focused on the HAC end drop and side drop conditions. The following sections describe the structural evaluation of the CCV with shielded device for HAC side drop and end drop conditions. The retaining bolts for the beam port shipping plug and the spacer plates are evaluated for side drop and end drop conditions, respectively, using applicable stress criteria from ASME Code, Appendix F [2.6], as shown in Table 2.1-3.

2.12.6.5.1 HAC Side Drop Evaluations NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 2.12-85 Table 2.12.6-5 Summary of CCV Force Evaluation for HAC Side Drop Table 2.12.6-6 Accelerations for Bolt Stress Evaluation for HAC Side Drop Table 2.12.6-7 Summary of Bolt Stress Evaluation for HAC Side Drop NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 4-i Chapter 4 Containment Table of Contents 4

CONTAINMENT............................................................................................................ 4-1 4.1 Description of the Containment System....................................................................... 4.1-1 4.2 Containment Under Normal Conditions of Transport.................................................. 4.2-1 4.2.1 NCT Pressurization of the Containment Vessel............................................... 4.2-1 4.2.2 NCT Containment Criterion............................................................................. 4.2-1 4.2.3 Compliance with NCT Containment Criterion................................................. 4.2-1 4.3 Containment Under Hypothetical Accident Conditions............................................... 4.3-1 4.3.1 HAC Pressurization of the Containment Vessel............................................... 4.3-1 4.3.2 HAC Containment Criterion............................................................................. 4.3-1 4.3.3 Compliance with HAC Containment Criterion................................................. 4.3-1 4.4 Leakage Rate Tests for Type B Packages..................................................................... 4.4-1 4.4.1 Fabrication Leakage Rate Test.......................................................................... 4.4-1 4.4.2 Maintenance Leakage Rate Test....................................................................... 4.4-1 4.4.3 Periodic Leakage Rate Test.............................................................................. 4.4-1 4.4.4 Pre-shipment Leakage Rate Test...................................................................... 4.4-1 4.5 Appendices.................................................................................................................... 4.5-1 4.5.1 References......................................................................................................... 4.5-1 4.5.2 Flammable Gas Calculations / Requirements................................................... 4.5-2 4.5.3 Chemical Compatibility of TRU Waste Contents............................................ 4.5-3 4.5.4 Hydrogen Concentration Calculations.............................................................. 4.5-4 4.5.5 Pressure Calculations for TRU Waste........................................................... 4.5-23 4.5.6 Hydrogen Generation Calculation for the Shielded Device Insert Assembly and Content................................................................................... 4.5-25 4.5.7 Pressure Calculation for the Shielded Device Insert Assembly and Content................................................................................... 4.5-30

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 4.2-1 4.2 Containment Under Normal Conditions of Transport 4.2.1 NCT Pressurization of the Containment Vessel The package maximum normal operating pressure (MNOP) is 100 psi (690 kPa) gauge, based on the definition of a Type B(U) packaging. Section 3.3.2 further discusses the NCT pressurization for TRU waste contents.

4.2.2 NCT Containment Criterion The package is designed to a leaktight containment criterion per ANSI N14.5 [4.3]. Therefore, the containment criterion is 10-7 ref cm3/s.

4.2.3 Compliance with NCT Containment Criterion Compliance with the NCT containment criterion is demonstrated by analysis. The structural evaluations in Sections 2.6 and 2.12 show there would be no loss or dispersal of radioactive contents, and that the containment boundary, seal region, and closure bolts do not undergo any inelastic deformation when subjected to the conditions of 10 CFR 71.71. The thermal evaluation in Section 3.3.1 shows the seals, bolts and containment system materials of construction do not exceed their temperature limits when subjected to the conditions of 10 CFR 71.71.

NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 4.3-1 4.3 Containment Under Hypothetical Accident Conditions 4.3.1 HAC Pressurization of the Containment Vessel The containment evaluation for HAC is performed assuming the maximum package pressure is 225 psi (1,551 kPa) gauge for TRU Waste contents.

4.3.2 HAC Containment Criterion The packaging is designed to a leaktight containment criterion per ANSI N14.5 [4.3].

Therefore, the containment criterion is 10-7 ref cm3/s.

4.3.3 Compliance with HAC Containment Criterion Compliance with the HAC containment criterion is demonstrated by analysis. The structural evaluations in Sections 2.7 and 2.12 show there would be no loss or dispersal of radioactive contents, and that the containment boundary, seal region, and closure bolts do not undergo any inelastic deformation when subjected to the conditions of 10 CFR 71.73. The thermal evaluation in Section 3.4.3 shows the seals, bolts and containment system materials of construction do not exceed their temperature limits when subjected to the conditions of 10 CFR 71.73.

NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 4.5-25 4.5.6 Hydrogen Generation Calculation for the Shielded Device Insert Assembly and Content NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 4.5-26 NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 4.5-27 NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 4.5-28 NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 4.5-29 NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 4.5-30 4.5.7 Pressure Calculation for the Shielded Device Insert Assembly and Content NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 4.5-31 NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5-ii List of Figures Figure 5.3-1 - MCNP Shielding Models - Package Geometries............................................ 5.3-6 Figure 5.3-2 - MCNP Shielding Model - NCT Source Configuration................................... 5.3-6 Figure 5.3-3 - MCNP Shielding Model - HAC Source Configuration.................................. 5.3-7 Figure 5.3-4 - MCNP Shielding Model - NCT Tally Locations............................................ 5.3-7 Figure 5.3-5 - MCNP Shielding Model - HAC Tally Locaiton............................................. 5.3-8 Figure 5.4-1 - MCNP Sample Input File.............................................................................. 5.4-12 Figure 5.5-1 - MCNP Models with 1-inch SIA (left) and 21/4-inch SIA (right).................... 5.5-11 Figure 5.5-2 - Cell Tally Locations - Centered Package...................................................... 5.5-11 Figure 5.5-3 - Schematic and VISED Slices of G10-1-360.................................................. 5.5-24 Figure 5.5-4 - Schematic and VISED Slices of G10-2-360.................................................. 5.5-25 Figure 5.5-5 - Schematic and VISED Slices of G10-1-2600................................................ 5.5-26 Figure 5.5-6 - Schematic and VISED Slices of G10-2-2600................................................ 5.5-27 Figure 5.5-7 - Schematic and VISED Slices of G10-2-2600-BX......................................... 5.5-28 Figure 5.5-8 - Schematic and VISED Slices of G10-3-150-A.............................................. 5.5-29 Figure 5.5-9 - Global RZT Mesh Plot of G10-1-360, Radial Biasing, 60Co (XZ)................ 5.5-36 Figure 5.5-10 - Global RZT Mesh Plot of G10-1-360, Radial Biasing, 60Co (XY)............. 5.5-37 Figure 5.5-11 - 2-meter Mesh Plot of G10-2-2600, Radial Biasing, 60Co............................ 5.5-38 Figure 5.5-12 - Top Surface Mesh Plot of G10-2-2600-BX, 137Cs...................................... 5.5-39 Figure 5.5-13 - Bottom Surface Mesh Plot of G10-2-360, 60Co........................................... 5.5-40 Figure 5.5-14 - VISED Slices of G10-1-360 with 1.75 Lead Reduction............................ 5.5-41 Figure 5.5-15 - Global RZT Mesh Plot of G10-1-360, Radial Biasing, 137Cs (XZ) - NCT Reduced Lead............................................................................................... 5.5-42 Figure 5.5-16 - Global RZT Mesh Plot of G10-1-360, Radial Biasing, 137Cs (XY) - NCT Reduced Lead............................................................................................... 5.5-43 Figure 5.5-17 - 2-meter Mesh Plot of G10-2-2600, Radial Biasing, 137Cs - NCT Reduced Lead.............................................................................................................. 5.5-44 Figure 5.5-18 - Top Surface Mesh Plot of G10-2-2600, 137Cs - NCT Reduced Lead........ 5.5-45 Figure 5.5-19 - Bottom Surface Mesh Plot of G10-1-360, 60Co - NCT Reduced Lead....... 5.5-46 Figure 5.5-20 - Global RZT Mesh Plot of G10-1-360, Radial Biasing, 137Cs (XZ) - HAC Reduced Lead............................................................................................... 5.5-47

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5-iii List of Tables Table 5.1-1 - Package Shielding Design Features.................................................................. 5.1-3 Table 5.1-2 - Maximum External Dose Rates Examples........................................................ 5.1-4 Table 5.2-1 - Photon Source Energy Group Structure............................................................ 5.2-3 Table 5.2-2 - Neutron Source Energy Group Structure.......................................................... 5.2-4 Table 5.3-1 - Primary MCNP Model Package Dimensions.................................................... 5.3-3 Table 5.3-2 - Directional OP Stainless Steel Shell Combined Thickness.............................. 5.3-3 Table 5.3-3 - MCNP Shielding Model - Tally Locations...................................................... 5.3-4 Table 5.3-4 - Material Compositions...................................................................................... 5.3-4 Table 5.3-5 - MCNP Material Definitions.............................................................................. 5.3-5 Table 5.4-1 - ANSI/ANS-6.1.1 1977 Flux-to-Dose Conversion Factors............................... 5.4-7 Table 5.4-2 - MCNP Gamma Dose Rate Summary................................................................ 5.4-8 Table 5.4-3 - MCNP Neutron Dose Rate Summary............................................................... 5.4-9 Table 5.4-4 - ORIGEN Grouped Cf-252 Spectra................................................................. 5.4-10 Table 5.4-5 - Cf-252 2-meter Dose Rate/Ci Calculation...................................................... 5.4-11 Table 5.5-1 - SIA Design Shielding Thicknesses................................................................... 5.5-4 Table 5.5-2 - MCNP Tally Locations - Centered Package.................................................... 5.5-4 Table 5.5-3 - MCNP NCT Gamma Dose Rates with No SIA............................................... 5.5-5 Table 5.5-4 - MCNP NCT Neutron Dose Rates with No SIA............................................... 5.5-6 Table 5.5-5 - MCNP NCT Gamma Dose Rates with 1-inch SIA........................................... 5.5-7 Table 5.5-6 - MCNP NCT Neutron Dose Rates with 1-inch SIA.......................................... 5.5-8 Table 5.5-7 - MCNP NCT Gamma Dose Rates with 21/4-SIA................................................ 5.5-9 Table 5.5-8 - MCNP NCT Neutron Dose Rates with 21/4-inch SIA..................................... 5.5-10 Table 5.5-9 - Sample Dose Rate Calculations...................................................................... 5.5-13 Table 5.5-10 - G10 Source Device Content Description..................................................... 5.5-16 Table 5.5-11 - Summary of Maximum OPTIMUS-L Dose Rates - Minimum Device Shielding - 100 mrem/hr Device Surface Limit Not Applied....................... 5.5-16 Table 5.5-12 - Summary of Maximum OPTIMUS-L Dose Rates........................................ 5.5-17 Table 5.5-13 - 60Co Source Spectrum................................................................................... 5.5-19 Table 5.5-14 - 137Cs Source Spectrum.................................................................................. 5.5-20 Table 5.5-15 - G10 Device Common Dimensions................................................................ 5.5-30 Table 5.5-16 - G10 Device Variable Dimensions................................................................. 5.5-31 Table 5.5-17 - Material Properties Used in Source Device Shielding Evaluation................ 5.5-31 Table 5.5-18 - OPTIMUS-L Maximum Dose Rates (mrem/hr)........................................... 5.5-48 Table 5.5-19 - Device Bottom Dose Rates with Minimum Lead......................................... 5.5-48 Table 5.5-20 - G10 360 Device Bottom Dose Rates with 3 Inches of Lead......................... 5.5-49 Table 5.5-21 - Governing Dose Rates Prior to Lead Reduction........................................... 5.5-49 Table 5.5-22 - G10-1-360 Radial and Bottom Dose Rates with 1.75 Lead Reduction....... 5.5-49 Table 5.5-23 - G10-2-2600 Co60dn Radial Dose Rates with 1.75 Lead Reduction........... 5.5-50 Table 5.5-24 - G10-2-2600-BX Co60dn Top Dose Rates with 1.75 Lead Reduction........ 5.5-50 Table 5.5-25 - G10 HAC 1 meter Dose Rates with 2.6 Lead Reduction............................ 5.5-50 Table 5.5-26 - Energy Desposition Source Description....................................................... 5.5-51 Table 5.5-27 - Beta Probability Spectrum for Co-60............................................................ 5.5-51 Table 5.5-28 - Beta Probability Spectrum for Cs-137.......................................................... 5.5-52 Table 5.5-29 - Internal Conversion Electron Intensities for Ba-137m................................. 5.5-52 Table 5.5-30 - Energy Desposition Results.......................................................................... 5.5-53

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-23 NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-31 Table 5.5 G10 Device Variable Dimensions Table 5.5 Material Properties Used in Source Device Shielding Evaluation NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-34 Reduced Lead Thickness 5.5.4.4.5 Energy Deposition Study NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-35

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-36 Figure 5.5 Global RZT Mesh Plot of G10-1-360, Radial Biasing, 60Co (XZ)

NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-37 Figure 5.5 Global RZT Mesh Plot of G10-1-360, Radial Biasing, 60Co (XY)

NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-38 Figure 5.5-11 2-meter Mesh Plot of G10-2-2600, Radial Biasing, 60Co NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-39 Figure 5.5-12 Top Surface Mesh Plot of G10-2-2600-BX, 137Cs NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-40 Figure 5.5-13 Bottom Surface Mesh Plot of G10-2-360, 60Co NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-41 Figure 5.5-14 VISED Slices of G10-1-360 with 1.75 Lead Reduction NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-42 Figure 5.5-15 Global RZT Mesh Plot of G10-1-360, Radial Biasing, 137Cs (XZ) - NCT Reduced Lead NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-43 Figure 5.5-16 Global RZT Mesh Plot of G10-1-360, Radial Biasing, 137Cs (XY) - NCT Reduced Lead NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-44 Figure 5.5-17 2-meter Mesh Plot of G10-2-2600, Radial Biasing, 137Cs - NCT Reduced Lead NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-45 Figure 5.5-18 Top Surface Mesh Plot of G10-2-2600, 137Cs - NCT Reduced Lead NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-46 Figure 5.5-19 Bottom Surface Mesh Plot of G10-1-360, 60Co - NCT Reduced Lead NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-47 Figure 5.5-20 Global RZT Mesh Plot of G10-1-360, Radial Biasing, 137Cs (XZ) - HAC Reduced Lead NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-48 Table 5.5 OPTIMUS-L Maximum Dose Rates (mrem/hr)

Table 5.5-19 Device Bottom Dose Rates with Minimum Lead NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-49 Table 5.5-20 G10 360 Device Bottom Dose Rates with 3 Inches of Lead Table 5.5-21 Governing Dose Rates Prior to Lead Reduction Table 5.5-22 G10-1-360 Radial and Bottom Dose Rates with 1.75 Lead Reduction NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-50 Table 5.5-23 G10-2-2600 Co60dn Radial Dose Rates with 1.75 Lead Reduction Table 5.5-24 G10-2-2600-BX Co60dn Top Dose Rates with 1.75 Lead Reduction Table 5.5-25 G10 HAC 1 meter Dose Rates with 2.6 Lead Reduction NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-51 Table 5.5-26 Energy Deposition Source Description Table 5.5-27 Beta Probability Spectrum for Co-60

• 1.17 and 1.33 MeV NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-52 Table 5.5-28 Beta Probability Spectrum for Cs-137 Table 5.5-29 Internal Conversion Electron Intensities for Ba-137m NAC PROPRIETARY INFORMATION REMOVED

OPTIMUS-L Package SAR November 2024 Docket No. 71-9390 Revision 24B NAC International 5.5-53 Table 5.5-30 Energy Deposition Results NAC PROPRIETARY INFORMATION REMOVED