ML23251A137

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NAC International, Inc., Safety Analysis Report, TRISO RAI Responses, Revision 23B
ML23251A137
Person / Time
Site: 07109390
Issue date: 08/31/2023
From:
NAC International
To:
Office of Nuclear Material Safety and Safeguards
Shared Package
ML23251A135 List:
References
ED20230122, EPID L-2022-LLA-0142
Download: ML23251A137 (1)
v • d • e


Text

August 2023 Revision 23B OPTIMUS-L (OPTImal Modular Universal Shipping Cask)

SAFETY ANALYSIS REPORT TRISO RAI Responses NON-PROPRIETARY VERSION Docket No. 71-9390 Atlanta Corporate Headquarters: 3930 East Jones Bridge Road, Norcross, Georgia 30092 USA Phone 770-447-1144, Fax 770-447-1797, www.nacintl.com

to ED20230122 Page 1 of 17 Enclosure 1 OPTIMUS-L SAR, Revision 23B RAI Responses August 2023

NAC INTERNATIONAL OPTIMUS-L NAC INTERNATIONAL PROPRIETARY RESPONSES TO THE NUCLEAR REGULATORY COMMISSION July17, 2023 REQUEST FOR ADDITIONAL INFORMATION FOR REVIEW OF THE NAC INTERNATIONAL OPTIMUS-L PACKAGE August 2023 Page 2 of 17

NAC INTERNATIONAL OPTIMUS-H TABLE OF CONTENTS Page STRUCTURAL AND MATERIALS EVALUATION ................................................................................ 5 THERMAL EVALUATION ...................................................................................................................... 11 CONTAINMENT EVALUATION ............................................................................................................ 14 CHANGES NOT RELATED TO QUESTIONS ........................................................................................ 17 Page 3 of 17

NAC INTERNATIONAL OPTIMUS-L SECTION A NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION Page 4 of 17

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION STRUCTURAL AND MATERIALS EVALUATION 2-1 Clarify the torque value for installation of cask containment vessel (CCV) port cover bolts in step 10, section 7.1.2 and step 7, section 7.3 of the SAR.

Note 6 on Drawing 70000.14-L510, Sheet 1 currently states, Alternatively, ASME SA-320, Grade L7 or L43 alloy steel may be used for the port cover bolts (Item 11). When this alternative is used, lubricate the threads of Item 11 and torque bolts to 45 +/- 3 IN-LB. The specified torque value of 15+/- 1 in-lbs in step 10, section 7.1.2 and step 7, section 7.3 of the SAR is not correct, if the alternate bolt material per Note 6 on Drawing 70000.14-L510, Sheet 1 is used for the port cover bolts. The procedure needs to be in alignment with the specified requirements on the licensing drawing.

This information is needed to satisfy the requirements of 10 CFR 71.107(a).

NAC International Response to RAI 2.1:

Step 10 in SAR Section 7.1.2 and Step 7 in SAR Section 7.3 have been revised to include Summary of Changes:

  • SAR Section 7.1.2, pg. 7.1-4: Added footnote 1 to Step 10.
  • SAR Section 7.3, pg. 7.3-1: Added footnote 2 to Step 7.

Page 5 of 17

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION STRUCTURAL AND MATERIALS EVALUATION 2-2 Justify acceptability of the seal weld as an alternate to the complete joint penetration (CJP) welds per Note 11 on Drawing 70000.14-L541 and Note 9 on Drawing 70000.14-L542 or remove these notes permitting an alternate seal weld.

Note 11 on Drawing 70000.14-L541, Revision 1P, Sheet 1 and Note 9 on Drawing 70000.14-L542, Revision 1P, Sheet 1 is added to permit a seal weld as an alternate weld to the specified CJP weld of the Outer Package Base and Lid inner shell. Per American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (BPVC)

Section IX, the definition of seal weld is, any weld designed primarily to provide a specific degree of tightness against leakage, which may not be the equivalent of a CJP weld.

This information is needed to confirm compliance with 10 CFR 71.31(b).

NAC International Response to RAI 2-2:

Summary of Changes:

None.

Page 6 of 17

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION STRUCTURAL AND MATERIALS EVALUATION 2-3 Clarify Section A-A on Drawing 70000.14-L561 Rev. 0P and provide additional dimensions and/or details of Item 1, bottom plate of the basket to identify the recessed extent of the bottom plate of the basket.

It is not clear from Section A-A which two components are being welded. For Item 1, only overall thickness dimension is provided, no other dimensions or details are provided.

The pictorial configuration of Item 1 shown on the drawing suggests part of the plate under the fuel tubes area has reduced thickness. Without additional details, the Item 1 configuration cannot be determined from this drawing.

This information is needed to determine compliance with 10 CFR 71.31(b), 10 CFR 71.71 and 10 CFR 71.73.

NAC International Response to RAI 2-3:

Summary of Changes:

Drawing 70000.14-L561 Rev. 1 incorporates changes showing the bottom view of the basket with dimension for the geometry of the recess features. Additionally, the thickness of the continuous upper section of the plate is added.

Page 7 of 17

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION STRUCTURAL AND MATERIALS EVALUATION 2-4 Provide the end drop evaluation for the bottom plate of the basket in section 7.0 of the calculation 70000.14-2108, Rev. 0, using the recessed bottom plate (i.e., with the reduced thickness - see RAI 2-3) under the fuel tubes area, or revise the plate configuration on the drawing to be consistent with the current evaluation.

Section 7.0, END DROP EVALUATION of the calculation 70000.14-2108 states the following in the first paragraph: During a bottom end drop, the tubes only apply a bearing load to the basket bottom plate. If the plate is recessed as pictorially depicted on the drawing, the bottom plate carries end drop load from the fuel tubes and self-weight in bending, which has not been analyzed.

This information is needed to determine compliance with 10 CFR 71.71 and 10 CFR 71.73.

NAC International Response to RAI 2-4:

Page 8 of 17

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION STRUCTURAL AND MATERIALS EVALUATION 2-5 Add requirement for coating GEO basket weldment carbon steel on Drawing 70000.14-L561, Rev. 0P.

In section 12.2.5 and elsewhere in the SAR, electroless nickel plating of carbon steel GEO basket weldment has been credited for corrosion protection. However, no such requirement for coating of carbon steel is specified on the GEO basket weldment drawing. The configuration on the licensing drawing needs to be in alignment with the evaluations contained in the SAR.

This information is required to satisfy the requirements of 10 CFR 71.43(d) and 10 CFR 71.107(a).

NAC International Response to RAI 2-5:

Page 9 of 17

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION STRUCTURAL AND MATERIALS EVALUATION 2-6 Provide Reference No. 14 and 22 used in section 6.3.2 and 7.4 of the calculation 70000.14-2108, Revision 0 for TRISO Compacts evaluation.

Reference 14, Compact Details, CUI, NAC Document 50065-DI-01 and Reference 22, BWXT Surrogate Mechanical Testing Results- 8-9-22 are used to obtain compact details and to establish TRISO compacts compressive strength, respectively. This information is requested to confirm that the compacts remain intact during the NCT and HAC drop scenarios as assumed in the criticality analysis in SAR section 6.9. If the compacts fail and reconfigure as a result of drop tests, then fissile material can relocate within or external to the basket tubes that hold the compacts, which is an unanalyzed condition. Note that the criticality analysis in Section 6.9 of the SAR assumes that the TRISO compacts are intact after the NCT and HAC tests.

This information is needed to ensure that the package meets the criticality safety requirements of 10 CFR 71.55 and 71.59.

NAC International Response to RAI 2-6:

Page 10 of 17

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-H NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION THERMAL EVALUATION 3-1 Provide in the SAR the minimum and maximum allowable temperatures of the GEO assembly components so that a comparison with calculated package temperatures during NCT and HAC can be performed and to confirm there is no degradation of components.

SAR section 1.1 indicated that the TRISO contents GEO assembly is new for the amendment request. Drawing No. L560 indicated that the GEO assembly, which holds the TRISO compact content, can include polymer adhesive and polymer spacers.

Polymers have the potential for undergoing thermal degradation depending on their properties. The SAR did not list minimum and maximum allowable temperatures for the GEO assembly, including the polymer adhesive and polymer spacers.

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

NAC International Response to RAI 3-1:

Page 11 of 17

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-H NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION THERMAL EVALUATION 3-2 Clarify that the numerical thermal model temperatures and the corresponding curves mentioned in SAR section 3.5.2.4 are bounding for decay heat content within local secondary containers.

SAR section 3.3 discussed the numerical modeling features from which the air temperature as a function of decay heat curves were generated. Since the curves described in SAR section 3.5.2.4 propose to use lower temperatures (for lower decay heats) when calculating hydrogen concentration (which is a function of temperature), it is important to ensure that the model results are bounding, recognizing that a high decay heat content locally within a small volume inside the Cask Containment Vessel (i.e.,

locally high decay heat density that may occur within discrete secondary containers discussed in SAR section 1.2.2.1), may not be represented by the bulk temperature of the models averaging assumption.

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

NAC International Response to RAI 3-2:

Page 12 of 17

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-H Page 13 of 17

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION CONTAINMENT EVALUATION 4-1 Clarify in the SAR that the TRISO content is commercial grade uranium with Type A activity and, if not, specify the concentrations of the radionuclides and the TRISO contents activity.

Although SAR section 5.2 indicated that TRISO content is fresh, unirradiated fuel and contains no significant radionuclide inventory, certain unirradiated fuel can contain radionuclide contaminants (e.g., Np-237) with slight concentrations that result in Type B activity.

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

NAC International Response to RAI 4-1:

Summary of Changes:

None.

Page 14 of 17

NAC INTERNATIONAL OPTIMUS-L NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION CONTAINMENT EVALUATION 4-2 Provide, in the SAR, specifications for the TRISO content and clarify that the TRISO content, which includes a graphite matrix, maintains structural integrity during HAC tests.

Although there was a stress calculation for the TRISO compact structure during a particular end drop, there were no details on the structural integrity of the TRISO content (which includes a graphite matrix according to SAR section 6.9.2) during HAC tests. In addition, there were no specifications that define the TRISO content, including geometry and dimension details, drawings, and structural properties such as toughness and fracture qualities.

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

NAC International Response to RAI 4-2:

See response to RAI 2-6.

Summary of Changes:

None.

Page 15 of 17

NAC INTERNATIONAL OPTIMUS-L SECTION B NAC INTERNATIONAL RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION PROPRIETARY RESPONSES Page 16 of 17

NAC PROPRIETARY INFORMATION REMOVED NAC INTERNATIONAL OPTIMUS-L CHANGES NOT RELATED TO QUESTIONS Chapter 1 Page 17 of 17

to ED20230122 Page 1 of 3 Enclosure 2 List of Drawing Changes TRISO Fuel Initial Application RAI Responses NAC OPTIMUS-L SAR, Revision 23B (Docket No 71-9390)

August 2023 to ED20230122 NAC PROPRIETARY INFORMATION REMOVED Page 2 of 3 Drawing 70000.14-L550, 1-Inch Shield Insert Assembly (SIA) - OPTIMUS, Rev 1P Drawing 70000.14-L551, 21/4-Inch Shield Insert Assembly (SIA) - OPTIMUS, Rev 1P Drawing 70000.14-L560, GEO Basket Assembly - OPTIMUS-L, Rev. 1P to ED20230122 NAC PROPRIETARY INFORMATION REMOVED Page 3 of 3 Drawing 70000.14-L560, GEO Basket Assembly - OPTIMUS-L, Rev. 1P (continued Drawing 70000.14-L561, GEO Basket Weldment - OPTIMUS-L, Rev. 1P

to ED20230122 Page 1 of 3 Enclosure 3 List of SAR Changes TRISO Fuel Initial Application RAI Responses NAC OPTIMUS-L SAR, Revision 23B (Docket No 71-9390)

August 2023 to ED20230122 Page 2 of 3 List of Changes for the OPTIMUS-L SAR, Revision 23B Chapter 1

  • Page 1.3-3, updated drawing revisions where indicated.

Chapter 2

  • Page 2-iv, added a new Figure 2.12.5-1, subsequent figures were renumbered.
  • Page 2-vi, page numbering for Tables 2.12.5-5 thru 2.12.5-19 updated.
  • Page 2.12-20, revised Section 2.12.5.4.2 where indicated.
  • Page 2.12-21 thru 2.12-22, added new subsection GEO Basket Bottom Plate NCT Bottom End Drop Stress Evaluation.
  • Page 2.12-23 revised section where indicated.
  • Page 2.12-24 thru 2.12-27, updated Figure numbering.
  • Page 2.12-28, text flow
  • Page 2.12-29 thru 2.12-31, updated figure numbers for Note 1 in Tables 2.12.5-5 thru 2.12.5-10
  • 2.12-32, added a new Figure 2.12.5-1.
  • Page 2.12-33 thru 2.12-39, figures were renumbered.
  • Page 2.12-40 thru 2.12-44, revised Section 2.12.5.5.1 where indicated.
  • Page 2.12-45, text flow
  • Page 2.12-46 thru 2.12-48, updated Note 1 figure numbers in Tables 2.12.5-11 thru 2.12.5-16
  • Page 2.12-49 thru 2.12-50, revised Section 2.12.5.6 where indicated.
  • Page 2.12-51, text flow.
  • Page 2.12-52, revised Section 2.12.5.6 where indicated.
  • Page 2.12-53, revised Table 2.12.5-17 where indicated.
  • Page 2.12-54, revised Table 2.12.5-19 where indicated and updated Figure 2.12.5-9 numbering.
  • Page 2.12-55, updated Figure 2.12.5-10 numbering.
  • Page 2.12-56, updated Figure 2.12.5-11 numbering.
  • Page 2.12-57, added Figure 2.12.5-12.

Chapter 3

  • Page 3-i, added Section 3.5.3.
  • Page 3-ii, added Figure 3.5-1.
  • Page 3-iii, added Table 3.5-1 and Table 3.5-2.
  • Page 3-1, revised Section 3.0 where indicated.

to ED20230122 Page 3 of 3

  • Page 3.1-1, revised Section 3.1 where indicated.
  • Page 3.5-6, added Section 3.5.3.
  • Page 3.5-7 thru 3.5-8, text flow.

Chapter 4

  • No changes.

Chapter 5

  • No changes.

Chapter 6

  • No changes.

Chapter 7

  • Page 7.1-4, revised Step 10 in Section 7.1.2 and added footnote.
  • Page 7.3-1, revised Step 7 in Section 7.3 and added footnote.
  • Page 7.3-2, text flow.

Chapter 8

  • No changes.

to ED20230122 Page 1 of 1 Enclosure 4 List of Effective Pages and SAR Changed Pages TRISO Fuel Initial Application RAI Responses NAC OPTIMUS-L SAR, Revision 23B (Docket No 71-9390)

August 2023

August 2023 Revision 23B OPTIMUS-L (OPTImal Modular Universal Shipping Cask)

SAFETY ANALYSIS REPORT NON-PROPRIETARY VERSION Docket No. 71-9390 Atlanta Corporate Headquarters: 3930 East Jones Bridge Road, Norcross, Georgia 30092 USA Phone 770-447-1144, Fax 770-447-1797, www.nacintl.com

OPTIMUS-L Safety Analysis Report August 2023 Docket No. 71-9390 Revision 23B List of Effective Pages Chapter 1 Page 3.1-1 ................................Revision 23B Page 1-i thru 1-ii ..................... Revision 22A Page 3.1-2 thru 3.1-4............... Revision 22A Page 1-1 ....................................... Revision 0 Page 3.1-5 .................................... Revision 0 Page 1.1-1 ............................... Revision 22A Page 3.2-1 thru 3.2-5.................... Revision 0 Page 1.1-2 .................................... Revision 0 Page 3.3-1 thru 3.3-20.................. Revision 0 Page 1.2-1 thru 1.2-17............. Revision 22A Page 3.4-1 thru 3.4-18.................. Revision 0 Page 1.3-1 .................................... Revision 0 Page 3.5-1 thru 3.5-4.................... Revision 0 Page 1.3-2 ............................... Revision 22A Page 3.5-5 ............................... Revision 22A Page 1.3-3 ................................Revision 23B Page 3.5-5 thru 3.5-8................Revision 23B 14 drawings (see Section 1.3) Chapter 4 Page 4-i thru 4-ii .......................... Revision 0 Chapter 2 Page 4-1 ....................................... Revision 0 Page 2-i ........................................ Revision 0 Page 4.1-1 thru 4.1-3.................... Revision 0 Page 2-ii .................................. Revision 22A Page 4.2-1 ............................... Revision 22A Page 2-iii ..................................Revision 23B Page 4.3-1 ............................... Revision 22A Page 2-iv ..................................Revision 23B Page 4.4-1 .................................... Revision 0 Page 2-v ....................................... Revision 0 Page 4.5-1 thru 4.5-12.................. Revision 0 Page 2-vi ..................................Revision 23B Page 4.5-13 ............................. Revision 22A Page 2-1 .................................. Revision 22A Page 4.5-14 .................................. Revision 0 Page 2.1-1 thru 2.1-20.................. Revision 0 Page 4.5-15 thru 4.5-16 ........... Revision 22A Page 2.2-1 thru 2.2-11.................. Revision 0 Page 4.5-17 .................................. Revision 0 Page 2.3-1 thru 2.3-4.................... Revision 0 Page 4.5-18 ............................. Revision 22A Page 2.4-1 .................................... Revision 0 Page 4.5-19 thru 4.5-20 ................ Revision 0 Page 2.5-1 thru 2.5-14.................. Revision 0 Page 4.5-21 ............................. Revision 22A Page 2.6-1 thru 2.6-15.................. Revision 0 Page 4.5-22 thru 4.5-23 ................ Revision 0 Page 2.6-16 ............................. Revision 22A Page 4.5-24 ............................. Revision 22A Page 2.6-17 thru 2.6-37 ................ Revision 0 Page 2.7-1 ............................... Revision 22A Chapter 5 Page 2.7-2 thru 2.7-52.................. Revision 0 Page 5-i thru 5-iii ......................... Revision 0 Page 2.8-1 .................................... Revision 0 Page 5-1 ....................................... Revision 0 Page 2.9-1 .................................... Revision 0 Page 5.1-1 .................................... Revision 0 Page 2.10-1 .................................. Revision 0 Page 5.1-2 ............................... Revision 22A Page 2.11-1 .................................. Revision 0 Page 5.1-3 thru 5.1-4.................... Revision 0 Page 2.12-1 thru 2.12-2................ Revision 0 Page 5.2-1 ............................... Revision 22A Page 2.12-3 thru 2.12-19 ......... Revision 22A Page 5.2-2 thru 5.2-4.................... Revision 0 Page 2.12-20 thru 2.12-57........Revision 23B Page 5.3-1 thru 5.3-8.................... Revision 0 Page 5.4-1 thru 5.4-20.................. Revision 0 Page 5.5-1 thru 5.5-22.................. Revision 0 Chapter 3 Page 3-i thru 3-iii ..................... Revision 23B Chapter 6 Page 3-1 ...................................Revision 23B Page 6-i thru 6-ii .................... Revision 22A Page 1 of 2

OPTIMUS-L Safety Analysis Report August 2023 Docket No. 71-9390 Revision 23B List of Effective Pages (contd)

Page 6-iii ...................................... Revision 0 Page 8.2-1 thru 8.2-8.................... Revision 0 Page 6-iv ................................. Revision 22A Page 8.3-1 .................................... Revision 0 Page 6-v ....................................... Revision 0 Page 6-vi thru 6-vii ................. Revision 22A Page 6-1 ....................................... Revision 0 Page 6.1-1 thru 6.1-2.................... Revision 0 Page 6.2-1 thru 6.2-4.................... Revision 0 Page 6.3-1 thru 6.3-23.................. Revision 0 Page 6.4-1 thru 6.4-15.................. Revision 0 Page 6.5-1 thru 6.5-18.................. Revision 0 Page 6.6-1 thru 6.6-20.................. Revision 0 Page 6.7-1 .................................... Revision 0 Page 6.8-1 thru 6.8-20.................. Revision 0 Page 6.9-1 ............................... Revision 22A Page 6.9.1-1 thru 6.9.1-2......... Revision 22A Page 6.9.2-1 thru 6.9.2-2......... Revision 22A Page 6.9.3-1 thru 6.9.3-19....... Revision 22A Page 6.9.4-1 ............................ Revision 22A Page 6.9.5-1 ............................ Revision 22A Page 6.9.6-1 ............................ Revision 22A Page 6.9.7-1 ............................ Revision 22A Page 6.9.8-1 thru 6.9.8-7......... Revision 22A Page 6.10-1 thru 6.10-2........... Revision 22A Chapter 7 Page 7-i ................................... Revision 22A Page 7-1 .................................. Revision 22A Page 7-2 thru 7-3.......................... Revision 0 Page 7.1-1 thru Page 7.1-3 ........... Revision 0 Page 7.1-4 ................................Revision 23B Page 7.1-5 .................................... Revision 0 Page 7.2-1 thru 7.2-2.................... Revision 0 Page 7.3-1 thru 7.3-2................Revision 23B Page 7.4-1 .................................... Revision 0 Page 7.5-1 .................................... Revision 0 Page 7.5-2 ............................... Revision 22A Page 7.5-3 thru 7.5-20.................. Revision 0 Page 7.5-21 thru 7.5-24 ........... Revision 22A Chapter 8 Page 8-i thru 8-ii .......................... Revision 0 Page 8-1 ....................................... Revision 0 Page 8.1-1 thru 8.1-5.................... Revision 0 Page 2 of 2

OPTIMUS-L Package SAR October 2022 Docket No. 71-9390 Revision 22A 1.3.4 Packaging General Arrangement Drawings The following drawings show the general arrangement and design features of the OPTIMUS-L packaging in accordance with NUREG/CR-5502 [1.7]. The drawings refer to material specifications, welding requirements, inspection and test requirements, and dimensions as necessary to support the safety analyses.

Drawing No. Title Rev.

  • 70000.14-L502 Packaging Assembly - OPTIMUS-L 0NP 70000.14-L510 CCV Assembly - OPTIMUS 0NP 70000.14-L511 CCV Body Weldment - OPTIMUS 0NP 70000.14-L512 CCV Lid - OPTIMUS 0NP 70000.14-L513 Port Cover - OPTIMUS 0NP 70000.14-L514 CCV Bottom Support Plate - OPTIMUS-L 0NP 70000.14-L540 Outer Packaging Assembly - OPTIMUS-L 0NP 70000.14-L541 Outer Packaging Base - OPTIMUS-L 0NP 70000.14-L542 Outer Packaging Lid - OPTIMUS-L 0NP 70000.14-L550 1-Inch Shield Insert Assembly (SIA) - OPTIMUS 0NP 70000.14-L551 21/4-Inch Shield Insert Assembly (SIA) - OPTIMUS 0NP 70000.14-L552 3 3/4-Inch Shield Insert Assembly (SIA) - OPTIMUS 1NP 70000.14-L553 21/4-Inch SIA Annular Spacer Plate - OPTIMUS-L 0NP 70000.14-L560 GEO Basket Assembly, OPTIMUS-L 0NP 70000.14-L561 GEO Basket Weldment, OPTIMUS-L 0NP
  • Proprietary drawings replaced by nonproprietary versions.

NAC International 1.3-3

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OPTIMUS-L Package SAR November 2021 Docket No. 71-9390 Revision 0 List of Figures Figure 2.1 CCV Stress Evaluation Locations.................................................................. 2.1-19 Figure 2.1 Package Mass Properties Schematic .............................................................. 2.1-20 Figure 2.2 5 pcf Foam Upper and Lower-Bound Dynamic Stress-Strain Curves........... 2.2-11 Figure 2.2 24 pcf Foam Upper and Lower-Bound Dynamic Stress-Strain Curves......... 2.2-11 Figure 2.5 Lifting Attachment Loading Diagram ........................................................... 2.5-12 Figure 2.5 Package Tiedown Configuration ................................................................... 2.5-13 Figure 2.5 Tiedown Arm Loading Diagram.................................................................... 2.5-14 Figure 2.6 1/2-Symmetry CCV FEA Stress Analysis Model.............................................. 2.6-6 Figure 2.6 Bounding NCT Heat Temperature Distribution .............................................. 2.6-7 Figure 2.6 NCT 4-Foot (1.2 m) Free Drop Impact Orientations ..................................... 2.6-28 Figure 2.6 Drop Analysis 1/2-Symmetry Model - Isometric View .................................. 2.6-29 Figure 2.6 Cold/Hard NCT Bottom End Drop (Case NBE1) Impact Limiter Deformation .............................................................................................. 2.6-30 Figure 2.6 Cold/Hard NCT Bottom End Drop (Case NBE1) Rigid-Body Acceleration Time-History ....................................................................... 2.6-30 Figure 2.6 Cold/Hard NCT Top End Drop (Case NTE1) Impact Limiter Deformation .............................................................................................. 2.6-31 Figure 2.6 Cold/Hard NCT Top End Drop (Case NTE1) Rigid-Body Acceleration Time-History ............................................................................................. 2.6-31 Figure 2.6 Cold/Hard NCT Bottom Corner Drop (Case NBC1) Impact Limiter Deformation .............................................................................................. 2.6-32 Figure 2.6 Cold/Hard NCT Bottom Corner Drop (Case NBC1) Rigid-Body Acceleration Time-History ....................................................................... 2.6-32 Figure 2.6 Cold/Hard NCT Top Corner Drop (Case NTC1) Impact Limiter Deformation .............................................................................................. 2.6-33 Figure 2.6 Cold/Hard NCT Top Corner Drop (Case NTC1) Rigid-Body Acceleration Time-History ....................................................................... 2.6-33 Figure 2.6 Cold/Hard NCT Side Drop (Case NS1) Impact Limiter Deformation ........ 2.6-34 Figure 2.6 Cold/Hard NCT Side Drop (Case NS1) Rigid-Body Acceleration Time-History ............................................................................................. 2.6-34 Figure 2.6 Cold/Hard NCT Side Drop (Case NS1) OP Bolt Average Tensile Stress Time-History .................................................................................. 2.6-35 Figure 2.6 SIA 1/8-Symmetry Finite Element Models ................................................. 2.6-36 Figure 2.7 HAC Free Drop Impact Orientations ............................................................... 2.7-5 Figure 2.7 HAC Hot/Soft Bottom End Drop (Case HBE2) OP Deformation................. 2.7-12 Figure 2.7 HAC Hot/Soft Top End Drop (Case HTE2) OP Deformation ...................... 2.7-13 Figure 2.7 HAC Cold/Hard Bottom End Drop (Case HBE1) Rigid-Body Acceleration Time-History ....................................................................... 2.7-14 Figure 2.7 HAC Cold/Hard Top End Drop (Case HTE1) Rigid-Body Acceleration Time-History ....................................................................... 2.7-14 Figure 2.7 HAC Cold/Hard Top End Drop (Case HTE1) OP Bolt Average Tensile Stress Time-History ..................................................................... 2.7-15 Figure 2.7 Hot/Soft HAC Side Drop (Case HS2) OP Deformation ................................ 2.7-20 NAC International 2-iii

OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B Figure 2.7 Cold/Hard HAC Side Drop (Case HS1) Rigid-Body Acceleration Time-History ............................................................................................. 2.7-20 Figure 2.7 Cold/Hard HAC Side Drop (Case HS1) OP Bolt Average Tensile Stress Time-History .................................................................................. 2.7-21 Figure 2.7 Hot/Soft HAC Bottom Corner Drop (Case HBC2) OP Deformation .......... 2.7-26 Figure 2.7 Hot/ Soft HAC Top Corner Drop (Case HTC2) OP Deformation .............. 2.7-27 Figure 2.7 Cold/Hard HAC Bottom Corner Drop (Case HBC1) Rigid-Body Acceleration Time-History ....................................................................... 2.7-28 Figure 2.7 Cold/Hard HAC Top Corner Drop (Case HTC1) Rigid-Body Acceleration Time-History ....................................................................... 2.7-28 Figure 2.7 Cold/Hard HAC Top Corner Drop (Case HTC1) OP Bolt Average Tensile Stress Time-History ..................................................................... 2.7-29 Figure 2.7 Cold/Hard HAC 10° Bottom Oblique Drop (Case HBO1) OP Deformations............................................................................................. 2.7-33 Figure 2.7 Cold/Hard HAC 10° Top End Oblique Drop (Case HTO1) OP Deformation .............................................................................................. 2.7-33 Figure 2.7 Cold/Hard HAC 10° Bottom End Oblique Drop (Case HBO1) Rigid-Body Acceleration Time-History.............................................................. 2.7-34 Figure 2.7 Cold/Hard HAC 10° Top End Oblique Drop (Case HTO1) Rigid-Body Acceleration Time-History.............................................................. 2.7-34 Figure 2.7 HAC Puncture Drop Orientations ................................................................ 2.7-40 Figure 2.7 Cumulative OP Deformation - Hot/Soft HAC Top Center Puncture (Case PTE1) .............................................................................................. 2.7-41 Figure 2.7 Cumulative OP Deformation - Hot/Soft HAC Top Off-Center Puncture (Case PTE2) ............................................................................... 2.7-42 Figure 2.7 Cumulative OP Deformation - Hot/Soft HAC Side Puncture (Case PS1) ........................................................................................................... 2.7-43 Figure 2.12 Benchmark Comparison of HAC Side Drop Analysis and Test Results ....................................................................................................... 2.12-6 Figure 2.12 DLF Curve for Half-Sine Pulse ................................................................. 2.12-10 Figure 2.12 CCV Shell Bottom End 1/2-Symmetry Finite Element Model ................... 2.12-10 Figure 2.12.5 GEO Basket Bottom Plate Finite Element Model................................... 2.12-32 Figure 2.12.5 GEO Basket Finite Element Model, 0° Orientation ............................... 2.12-33 Figure 2.12.5 GEO Basket Finite Element Model, 30° Orientation ............................. 2.12-34 Figure 2.12.5 Plate Section Locations for Stress Evaluations, 0° GEO Model ............ 2.12-35 Figure 2.12.5 Weld Section Locations for Stress Evaluations, 0° GEO Model............ 2.12-36 Figure 2.12.5 Plate Section Locations for Stress Evaluations, 30° GEO Model .......... 2.12-37 Figure 2.12.5 Weld Section Locations for Stress Evaluations, 30° GEO Model.......... 2.12-38 Figure 2.12.5 GEO Basket Fule Tube Finite Element Models ..................................... 2.12-69 Figure 2.12.5 SDOF Transient Analysis Model Schematic .......................................... 2.12-54 Figure 2.12.5 GEO Basket Details for Modal Analasys Model .................................. 2.12-55 Figure 2.12.5 CCV and GEO Basket Model for Modal Analysis ............................... 2.12-56 Figure 2.12.5 GEO Basket Bottom Plate Model for Modal Analysis ......................... 2.12-57 NAC International 2-iv

OPTIMUS-L Package SAR November 2021 Docket No. 71-9390 Revision 0 List of Tables Table 2.1 Load Combinations for Normal Conditions of Transport ............................... 2.1-13 Table 2.1 Load Combinations for Hypothetical Accident Conditions ............................ 2.1-14 Table 2.1 Containment System Allowable Stress Design Criteria.................................. 2.1-15 Table 2.1 Non-Containment Component Allowable Stress Design Criteria .................. 2.1-16 Table 2.1 CCV Shell Buckling Geometric Parameters ................................................... 2.1-17 Table 2.1 CCV Shell Buckling Reduction Factors and Theoretical Buckling Stresses ...................................................................................................... 2.1-17 Table 2.1 CCV Shell Allowable Buckling Stresses ........................................................ 2.1-18 Table 2.1 Package Weight and Center of Gravity Summary .......................................... 2.1-18 Table 2.2 Packaging Structural Material Specifications ................................................... 2.2-6 Table 2.2 Mechanical Properties of SA-182, Type F304/F316 Stainless Steel (t > 5 in.) ..................................................................................................... 2.2-7 Table 2.2 Mechanical Properties of A240/SA-240 or A479/SA-479, Type 304/316 Stainless Steel ............................................................................... 2.2-7 Table 2.2 Mechanical Properties of SA-320, Grade L43 Alloy Steel Bolts (t 4 in.) ..................................................................................................... 2.2-8 Table 2.2 Mechanical Properties of SA-193, Grade B8, Class 1 Stainless Steel Bolts ............................................................................................................ 2.2-8 Table 2.2 Mechanical Properties of A36/SA-36 Carbon Steel ......................................... 2.2-9 Table 2.2 Mechanical Properties of A240/SA-240 or A479/SA-479, Type XM-19 Stainless Steel ............................................................................................. 2.2-9 Table 2.2 Mechanical Properties of A574/SA-574 Alloy Steel Socket-Head Cap Screws ....................................................................................................... 2.2-10 Table 2.2 9 - Mechanical Properties of A516, Grade 70 Carbon Steel ................................ 2.2-10 Table 2.5 Lifting Attachment Stress Summary ............................................................... 2.5-11 Table 2.5 Tiedown Attachment Stress Summary ............................................................ 2.5-11 Table 2.6 Reduced External Pressure Stress Summary................................................... 2.6-11 Table 2.6 Summary of NCT Free Drop Cases Evaluated ............................................... 2.6-24 Table 2.6 NCT Free Drop Impact Analysis Results........................................................ 2.6-24 Table 2.6 NCT End Drop Stress Summary ..................................................................... 2.6-25 Table 2.6 NCT Side Drop Stress Summary .................................................................... 2.6-26 Table 2.6 NCT Top Corner Drop Stress Summary ......................................................... 2.6-26 Table 2.6 CCV Shell NCT Free Drop Buckling Evaluation Stress Summary ................ 2.6-27 Table 2.6 CCV Shell Buckling Evaluation Results for NCT Free Drop......................... 2.6-27 Table 2.7 Summary of HAC Free Drop Cases Evaluated ................................................. 2.7-4 Table 2.7 HAC End Drop Impact Limiter Analysis Results ........................................... 2.7-10 Table 2.7 HAC End Drop Stress Summary..................................................................... 2.7-10 Table 2.7 CCV Shell HAC End Drop Buckling Evaluation Stress Summary ................ 2.7-11 Table 2.7 CCV Shell Buckling Evaluation Results for HAC Bottom End Drop ............ 2.7-11 Table 2.7 HAC Side Drop Impact Limiter Analysis Results .......................................... 2.7-19 Table 2.7 HAC Side Drop Stress Summary .................................................................... 2.7-19 Table 2.7 HAC Corner Drop Impact Limiter Analysis Results ...................................... 2.7-25 Table 2.7 HAC Top Corner Drop Stress Summary ........................................................ 2.7-25 Table 2.7 HAC Oblique Drop Impact Limiter Analysis Results .................................. 2.7-32 Table 2.7 Summary of HAC Puncture Cases Evaluated ............................................... 2.7-40 NAC International 2-v

OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B Table 2.7 HAC Pressure Stress Summary ..................................................................... 2.7-46 Table 2.7 Deep Water Immersion Test Stress Summary .............................................. 2.7-49 Table 2.7 CCV Shell Buckling Summary for Deep Water Immersion Test ................. 2.7-50 Table 2.12 Comparison of LS-DYNA Model and 1/2-Scale NAC-UMS Parameters ...... 2.12-6 Table 2.12 Summary of Free Drop DLFs and Equivalent Static Accelerations ............. 2.12-9 Table 2.12.5 GEO Basket Allowable Stress Design Criteria ........................................ 2.12-13 Table 2.12.5 Package Weight and Center of Gravity Summary for Geo Basket and TRISO Compact Contents Configuration ........................................ 2.12-13 Table 2.12.5 Mechanical Properties of SA537, Class 1 Carbon Steel .......................... 2.12-16 Table 2.12.5 Mechanical Properties of SA350, LF3 Carbon Steel ............................... 2.12-16 Table 2.12.5 GEO Basket NCT Side Drop Plate Stress Summary, Pm ......................... 2.12-29 Table 2.12.5 GEO Basket NCT Side Drop Plate Stress Summary, Pm + Pb ................. 2.12-29 Table 2.12.5 GEO Basket NCT Side Drop CJP Weld Stress Summary, Pm ................. 2.12-30 Table 2.12.5 GEO Basket NCT Side Drop CJP Weld Stress Summary, Pm + Pb ......... 2.12-30 Table 2.12.5 GEO Basket NCT Side Drop Fillet Weld Stress Summary ..................... 2.12-31 Table 2.12.5 GEO Basket Fuel Tube NCT Side Drop Radial Compressive Forces ...................................................................................................... 2.12-31 Table 2.12.5 GEO Basket HAC Side Drop Plate Stress Summary, Pm ...................... 2.12-46 Table 2.12.5 GEO Basket HAC Side Drop Plate Stress Summary, Pm + Pb ............... 2.12-46 Table 2.12.5 GEO Basket HAC Side Drop CJP Weld Stress Summary, Pm .............. 2.12-47 Table 2.12.5 GEO Basket HAC Side Drop CJP Weld Stress Summary, Pm + Pb....... 2.12-47 Table 2.12.5 GEO Basket HAC Side Drop Fillet Weld Stress Summary................... 2.12-48 Table 2.12.5 GEO Basket Fuel Tube HAC Side Drop Radial Compressive Forces ...................................................................................................... 2.12-48 Table 2.12.5 Summary of End Drop DLFs ................................................................. 2.12-53 Table 2.12.5 Summary of Side Drop DLFs ................................................................ 2.12-53 Table 2.12.5 Summary of Equivalent Static Accellerations ....................................... 2.12-54 NAC International 2-vi

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR October 2022 Docket No. 71-9390 Revision 22A NAC International 2.12-19

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-20

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-21

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-22

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-23

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-24

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-25

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-26

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-27

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-28

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B Table 2.12.5 GEO Basket NCT Side Drop Plate Stress Summary, Pm Table 2.12.5 GEO Basket NCT Side Drop Plate Stress Summary, Pm + Pb NAC International 2.12-29

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B Table 2.12.5 GEO Basket NCT Side Drop CJP Weld Stress Summary, Pm Table 2.12.5 GEO Basket NCT Side Drop CJP Weld Stress Summary, Pm + Pb NAC International 2.12-30

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B Table 2.12.5 GEO Basket NCT Side Drop Fillet Weld Stress Summary Table 2.12.5 GEO Basket Fuel Tube NCT Side Drop Radial Compressive Forces NAC International 2.12-31

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B Figure 2.12.5 GEO Basket Bottom Plate Finite Element Model NAC International 2.12-32

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B Figure 2.12.5 GEO Basket Finite Element Model, 0° Orientation NAC International 2.12-33

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B Figure 2.12.5 GEO Basket Finite Element Model, 30° Orientation NAC International 2.12-34

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B Figure 2.12.5 Plate Section Locations for Stress Evaluations, 0° GEO Model NAC International 2.12-35

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B Figure 2.12.5 Weld Section Locations for Stress Evaluations, 0° GEO Model NAC International 2.12-36

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B Figure 2.12.5 Plate Section Locations for Stress Evaluations, 30° GEO Model NAC International 2.12-37

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B Figure 2.12.5 Weld Section Locations for Stress Evaluations, 30° GEO Model NAC International 2.12-38

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B Figure 2.12.5 GEO Basket Fuel Tube Finite Element Models NAC International 2.12-39

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-40

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-41

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-42

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-43

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-44

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-45

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B Table 2.12.5 GEO Basket HAC Side Drop Plate Stress Summary, Pm Table 2.12.5 GEO Basket HAC Side Drop Plate Stress Summary, Pm + Pb NAC International 2.12-46

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B Table 2.12.5 GEO Basket HAC Side Drop CJP Weld Stress Summary, Pm Table 2.12.5 GEO Basket HAC Side Drop CJP Weld Stress Summary, Pm + Pb NAC International 2.12-47

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B Table 2.12.5 GEO Basket HAC Side Drop Fillet Weld Stress Summary Table 2.12.5 GEO Basket Fuel Tube HAC Side Drop Radial Compressive Forces NAC International 2.12-48

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B 2.12.5.6 Development of Equivalent Static Loads for GEO Basket Assembly Evaluations NAC International 2.12-49

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-50

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-51

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B NAC International 2.12-52

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B Table 2.12.5 Summary of End Drop DLFs Table 2.12.5 Summary of Side Drop DLFs NAC International 2.12-53

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B Table 2.12.5 Summary of Equivalent Static Accelerations Figure 2.12.5 SDOF Transient Analysis Model Schematic NAC International 2.12-54

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B Figure 2.12.5 GEO Basket Details for Modal Analysis Model NAC International 2.12-55

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B Figure 2.12.5 CCV & GEO Basket Model for Modal Analysis NAC International 2.12-56

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B Figure 2.12.5 GEO Basket Bottom Plate Model for Modal Analysis NAC International 2.12-57

OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B Chapter 3 Thermal Evaluation Table of Contents 3 THERMAL EVALUATION ........................................................................................... 3-1 3.1 Description of Thermal Design ..................................................................................... 3.1-1 3.1.1 Design Features ................................................................................................. 3.1-1 3.1.2 Contents Decay Heat ....................................................................................... 3.1-2 3.1.3 Summary Table of Temperatures...................................................................... 3.1-2 3.1.4 Summary Table of Maximum Pressures ........................................................... 3.1-4 3.2 Material Properties and Component Specifications ...................................................... 3.2-1 3.2.1 Material Properties ............................................................................................ 3.2-1 3.2.2 Component Specifications ................................................................................ 3.2-1 3.3 Thermal Evaluation Under Normal Conditions of Transport ....................................... 3.3-1 3.3.1 Heat and Cold ................................................................................................. 3.3-12 3.3.2 Maximum Normal Operating Pressure ........................................................... 3.3-12 3.4 Thermal Evaluation Under Hypothetical Accident Conditions .................................... 3.4-1 3.4.1 Initial Conditions .............................................................................................. 3.4-1 3.4.2 Fire Test Conditions.......................................................................................... 3.4-2 3.4.3 Maximum Temperatures and Pressure.............................................................. 3.4-4 3.4.4 Maximum Thermal Stresses ............................................................................. 3.4-7 3.4.5 Accident Conditions for Fissile Material Packages for Air Transport ............. 3.4-7 3.5 Appendices .................................................................................................................... 3.5-1 3.5.1 References ......................................................................................................... 3.5-1 3.5.2 Sensitivity Analyses of Modeling Parameters .................................................. 3.5-3 3.5.3 Thermal Evaluation for TRISO Compact Contents .......................................... 3.5-6 NAC International 3-i

OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B List of Figures Figure 3.3 Package 3-D 1/2-Symmetry Thermal Models for NCT ................................... 3.3-16 Figure 3.3 Expanded View of the CCV with Contents Modeled in 110-Gallon Drum .............................................................................................................. 3.3-17 Figure 3.3 Application of Convection Boundary Conditions for NCT (and Shade)....... 3.3-18 Figure 3.3 Heat Transfer Coefficients for General Standards (shade) and NCT ............ 3.3-19 Figure 3.3 NCT Heat Temperature Contour Plot - 100W Volumetric Heat Source ...... 3.3-20 Figure 3.4 Package 3-D 1/2-Symmetry Thermal Models for HAC .................................... 3.4-9 Figure 3.4 Convection Boundary Conditions for HAC................................................... 3.4-10 Figure 3.4 Heat Transfer Coefficients for HAC Analyses (Fire) .................................... 3.4-11 Figure 3.4 Heat Transfer Coefficients for HAC Analyses (Post-Fire Cool Down) ........ 3.4-12 Figure 3.4 Charred Polyurethane Foam at End of the Fire ............................................. 3.4-13 Figure 3.4 HAC Fire Temperature Time-Histories (100W Volumetric Heat Source in 110-gallon Drum,, Helium Fill Gas) ......................................................... 3.4-14 Figure 3.4 HAC Fire Temperature Time-Histories (100W Surface Heat Flux, Helium Fill Gas) ............................................................................................ 3.4-14 Figure 3.4-7A - HAC Fire Temperature Time-Histories (100W Volumetric Heat Source in 55-gallon Drum in SIA, Helium Fill Gas)................................................ 3.4-15 Figure 3.4 HAC Transient Analysis Temperature Contour Plots (100W Volumetric Heat Load in 110-gallon Drum, Helium Fill Gas) ........................................ 3.4-16 Figure 3.4-8A - HAC Transient Analysis Temperature Contour Plots (100W Volumetric Heat Load in 55-gallon Drum in SIA, Helium Fill Gas) ............................... 3.4-17 Figure 3.4 HAC Transient Analysis Temperature Contour Plots (100W Surface Heat Flux on CCV Cavity ) ........................................................................... 3.4-18 Figure 3.5 Modified Damage HAC Thermal Model ......................................................... 3.5-8 NAC International 3-ii

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B List of Tables Table 3.1 Summary of Packaging Temperatures for NCT................................................ 3.1-5 Table 3.1 Summary of Packaging Temperatures for HAC ............................................... 3.1-5 Table 3.1 Summary of Maximum Pressures ..................................................................... 3.1-5 Table 3.2 Thermal Properties of Stainless Steel ............................................................... 3.2-2 Table 3.2-1A - Thermal Properties of Carbon Steel ............................................................... 3.2-2 Table 3.2 Thermal Properties of Polyurethane Foam ....................................................... 3.2-3 Table 3.2 Thermal Properties of ...................................................... 3.2-3 Table 3.2 Thermal Properties of Dry Air at Standard Pressure ........................................ 3.2-4 Table 3.2 Thermal Properties of Helium Gas at Standard Pressure .................................. 3.2-5 Table 3.2 Temperature Limits of Packaging Components ................................................ 3.2-5 Table 3.3 Nusselt Number Calculation Constants of a Cylinder in Cross Flow ............. 3.3-15 Table 3.3 Maximum Package Temperatures for NCT Heat............................................ 3.3-15 Table 3.3 Summary of Maximum Pressures for NCT .................................................... 3.3-15 Table 3.4 Maximum Package Temperatures for HAC ...................................................... 3.4-8 Table 3.4 Summary of HAC Pressures ............................................................................. 3.4-8 Table 3.5 Maximum HAC Package Temperatures vs. CCV Position in OP Cavity......... 3.5-7 Table 3.5 Maximum HAC Package Temperatures vs. Damage Model ............................ 3.5-7 NAC International 3-iii

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OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B 3 THERMAL EVALUATION This section summarizes the thermal evaluation of the OPTIMUS-L package. TRU waste and irradiated fuel waste contents are evaluated for the Normal Conditions of Transport (NCT) and Hypothetical Accident Conditions (HAC) prescribed by 10 CFR 71 in Sections 3.3 and 3.4.

TRISO compact contents, which are limited to fresh (unirradiated) fuel, have no appreciable decay heat load. As such, maximum packaging component temperatures for TRISO contents are significantly lower than the maximum temperatures for TRU waste and irradiated fuel waste contents and no detailed thermal evaluation is required. Further discussion on thermal considerations for the TRISO compact contents is included in Section 3.5.3. The results of the thermal evaluation demonstrate that the packaging will remain within the applicable thermal limits, demonstrating the packages structural, containment and shielding integrity is not negatively affected during the NCT and HAC.

NAC International 3-1

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NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B 3.1 Description of Thermal Design The OPTIMUS L packaging, shown in Figure 1.1-1, consists of a Cask Containment Vessel (CCV) within an Outer Packaging (OP). An optional Shield Insert Assembly (SIA) may be used inside the CCV to provide supplemental shielding for some contents. Narrative descriptions of these components are provided in Section 3.1.1.

When used to transport unirradiated TRISO compact contents, the packaging is configured with the GEO basket assembly inside the CCV cavity. The GEO basket assembly is described in Chapter 1 and does not include any special thermal design features. As such, the GEO basket assembly is not included in the following discussions.

3.1.1 Design Features Containment of the radioactive contents is provided by the CCV. Impact and thermal protection for the CCV is provided by the OP. The SIA is placed inside the CCV cavity for contents that require additional shieling. All details and relevant dimensions of the packaging components are provided in the Licensing Drawings in Appendix 1.3.3.

CCV Design Features The CCV is the primary containment boundary of the package.

The CCV lid is machined to include operating and containment features, such as a port for evacuation and backfill of the cavity with inert gas and O-ring grooves to provide a leaktight seal.

OP Design Features The OP is comprised of a base and lid that form an internal cavity inside which the CCV is placed. The OP base and lid are both constructed of stainless steel shells that are filled with structural evaluation presented in Chapter 2 shows the OP bolts do not fail during the HAC free drop and HAC puncture tests.

SIA Design Features The SIA is a painted carbon steel weldment that is provided in two different configurations:

1-inch and 21/4-inch SIAs. Both SIAs consist of an open-top cylindrical cavity (sized to accommodate a 55-gallon drum) formed by a cylindrical shell with an integral bottom support NAC International 3.1-1

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NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR October 2022 Docket No. 71-9390 Revision 22A 3.5.2.4 CCV Content Temperature vs. Decay Heat Load NAC International 3.5-5

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B 3.5.3 Thermal Evaluation for TRISO Compact Contents NAC International 3.5-6

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS -L Package SAR August 2023 Docket No. 71-9390 Revision 23B Table 3.5 Maximum HAC Package Temperatures vs. CCV Position in OP Cavity Table 3.5 Maximum HAC Package Temperatures vs. Damage Model NAC International 3.5-7

NAC PROPRIETARY INFORMATION REMOVED OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B Figure 3.5 Modified Damage HAC Thermal Model NAC International 3.5-8

OPTIMUS-L Package SAR November 2021 Docket No. 71-9390 Revision 0 Note: A maintenance leakage rate test is required for any replaced CCV lid or vent port containment O-ring, per Section 8.2.2.1.

15. Visually inspect the O-ring seals for signs of damage or defects (e.g., cracks, tears, cuts, or discontinuities) that may prevent them from sealing properly when the package is assembled.

Replace any damaged or defective O-ring seals with new O-ring seals in accordance with the requirements of the Maintenance Program described in Section 8.2.3.1.

16. Coat the exposed surfaces of the CCV lid and CCV port cover O-ring seals with vacuum grease prior to assembling the package to minimize deterioration or cracking of the seal during use. Remove excess vacuum grease from the O-ring and fastener seals prior to assembling the package.
17. Visually inspect the CCV lid bolts, CCV port cover bolts and test port plugs for signs of excessive wear and/or damage. Repair or replace any damaged bolts in accordance with the requirements of the Maintenance Program described in Section 8.2.3.3.

Caution: When lowering packaging internals inside the CCV cavity, protect the CCV body bolt flange sealing surface from damage (e.g., scratches or gouges).

18. If packaging internals (e.g., cribbing/dunnage, SIA body, etc.) required for the shipment are not inside the CCV cavity, use suitable rigging to lift and lower the required internals into the CCV cavity.

7.1.2 Loading of Contents This section describes the operations for loading the contents into the package and closing the package. The general procedure for loading the contents into the package and closing the package is as follows:

1. Confirm that the contents to be loaded meet the requirements of the Certificate of Compliance.
2. Verify that the packaging internals (e.g., cribbing/dunnage and SIA components) required for the shipment are properly configured in the CCV cavity.

Caution: When lowering the contents into the CCV or SIA cavity, protect the CCV body bolt flange sealing surface from damage (e.g., scratches or gouges).

3. Lower the contents into the CCV cavity or SIA cavity (if used).

NAC International 7.1-3

OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B

4. Clean and visually inspect the sealing surface for the CCV lid (i.e., the area of the CCV body bolt flange inboard of the CCV lid bolt holes) and the CCV port cover (i.e., the area of the CCV lid port opening inboard of the CCV port cover bolt holes), if removed, for wear and/or damage (e.g., scratches, gouges, nicks, cracks, etc.) that may prevent the containment O-rings and fastener seals from sealing properly.
5. Coat the CCV closure bolt threads with thread lubricant.
6. Lift the CCV lid, position it over the alignment pins on the CCV body, and carefully lower it onto the CCV body.
7. Remove the SHRs from the CCV lid.
8. Tighten each of the CCV lid bolts, in the sequence shown on the CCV lid, to a torque of 300 +/- 15 ft-lbs and repeat the sequence to verify that all CCV lid bolts are tightened to the required torque.
9. If the package is loaded with contents having a total heat load greater than 50 watts evacuate the CCV cavity and contents to an oxygen content of 1% or less, then backfill with helium gas.
10. If removed, install the CCV port cover and torque the port cover bolts to 15+/- 1 in-lbs1.

7.1.3 Preparation for Transport This section describes the operations for preparing the package for transport, including pre-shipment leakage rate tests, radiation and contamination surveys, measurement of the package surface temperature, securement of the package, and application of tamper-indicating devices. The general procedure for preparing each package for transport is as follows:

Note: A pre-shipment leakage rate test of the CCV port cover O-ring seals is required prior to every shipment, even if the port cover is not removed for loading operations.

1. Perform the pre-shipment leakage rate test of the CCV lid and port cover O-ring seals in accordance with a written procedure that satisfies the requirements of Section 8.2.2.2.
2. Install the plugs in the leak test ports of the CCV lid and CCV port cover.
3. Decontaminate the exterior top surface of the CCV as necessary..

1 Torque applies to CCV port cover bolts made from SA193, Gr. B8, Class 1 material. When CCV port cover bolts made from SA-320, Grade L7 or L43 material are used, torque the port cover bolts to 45 +/- 3 in-lbs.

NAC International 7.1-4

OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B 7.3 Preparation of Empty Packaging for Transport This section describes the procedure for preparing a previously used and empty package for transport, including the inspections, tests, and special preparations needed to ensure that the packaging is verified to be empty, is properly closed, and that the radiation and contamination levels are within the applicable allowable limits. The general procedure for preparing each empty package for transport is as follows:

1. Visually inspect the CCV cavity or SIA cavity to confirm that it has been emptied of its contents as far as practical.
2. Survey the interior of the internal surfaces of the package (i.e., CCV bottom support plate, CCV cavity, CCV flange, and underside of the CCV lid) and any empty payload internals (e.g., SIA body and dunnage, if used) to be shipped to verify that the interior contamination limits of 49 CFR 173.428(d) are satisfied. If the non-fixed surface contamination exceeds the limits for empty package shipment, then decontaminate the interior surfaces, as necessary.
3. Visually inspect the readily accessible surfaces of the packaging components for any signs of damage that may have occurred during prior use to verify that the package is in unimpaired physical condition.
4. Apply thread lubricant to the threaded fasteners of the package.
5. Install the CCV closure lid and tighten each of the twelve (12) CCV lid bolts, in the sequence shown on the CCV lid, to a torque of 300 +/- 15 ft-lbs, then repeat the sequence to verify that all CCV lid bolts are tightened to the required torque.
6. Remove the SHRs from the CCV lid.
7. If the CCV port cover has been removed from the CCV lid, install the CCV port cover and torque each of the four (4) port cover bolts to 15 +/- 1 in-lbs. 2
8. Place the OP lid onto the OP base.
9. Torque each of the OP lid bolts to a torque of 50 +/- 5 ft-lbs.
10. If required, move the package from the inspection area to the trailer.
11. Verify that the package tiedowns are installed and the package is secured to the trailer..

2 Torque applies to CCV port cover bolts made from SA193, Gr. B8, Class 1 material. When CCV port cover bolts made from SA-320, Grade L7 or L43 material are used, torque the port cover bolts to 45 +/- 3 in-lbs.

NAC International 7.3-1

OPTIMUS-L Package SAR August 2023 Docket No. 71-9390 Revision 23B

12. Install the tiedown disabling devices on the OP lid lifting lugs
13. Install the tamper-indicating devices on the package.
14. Perform a radiation survey to confirm that the dose rates on the external surface of the package does not exceed 0.005 mSv/hour (0.5 mrem/hour) in accordance with the 49 CFR 71.421(a)(2).
15. Perform a contamination survey to confirm that the non-fixed (removable) radioactive surface contamination on the external surfaces of the package does not exceed the limits specified in 40 CFR 173.443(a). If the non-fixed surface contamination exceeds the limits, then decontaminate the interior surfaces, as necessary.
16. Cover the packaging marking and labelling with an Empty label as prescribed in 49 CFR 172.450.
17. Release the package to the Carrier for the return shipment.

NAC International 7.3-2 to ED20230122 Page 1 of 2 Enclosure 5 List of Calculations TRISO Fuel RAI Responses NAC OPTIMUS-L SAR, Revision 23B August 2023 to ED20230122 Page 2 of 2 List of Calculations

1. 70000.14-2108 Rev. 1
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