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MONTHYEARML19218A0562019-08-23023 August 2019 Acceptance for Review of Westinghouse Electric Company WCAP-16045-P-A, Addendum 2, Revision 0, and WCAP-16045-NP-A, Addendum 2, Revision 0, Updated Nexus Cross-Section Methodology Project stage: Acceptance Review ML19218A0602019-09-0303 September 2019 Request for Withholding Information from Public Disclosure Westinghouse Electric Company WCAP-16045-P-A, Addendum 2, Revision 0, and Wcap-16045-NP-A, Addendum 2, Revision 0, Updated Nexus Cross-Section Methodology Project stage: Withholding Request Acceptance ML19343A0552019-12-0909 December 2019 12-9-19 Email Transmitting Cover Letter for Request for Additional Information Westinghouse Electric Company Topical Report WCAP-16045-P-A, Addendum 2, Revision 0, and WCAP-16045-NP-A, Addendum 2, Revision 0 Updated Nexus Cross-Section Meth Project stage: RAI ML20121A3062020-05-20020 May 2020 Cover Letter Draft Safety Evaluation for Westinghouse Electric Company Topical Report WCAP-16045-P-A, Addendum 2, Revision 0, and WCAP-16045-NP-A, Addendum 2, Revision 0, Updated Nexus Cross-Section Methodology Project stage: Draft Approval ML20196L6362020-07-21021 July 2020 Non Prop Enclosure 1 - Final Safety Evaluation for Westinghouse Electric Company Topical Report WCAP-16045-P-A, Addendum 2, Revision 0, and WCAP-16045-NP-A, Addendum 2, Revision 0, Updated Nexus Cross-Section Methodology Project stage: Approval ML20196L6332020-07-21021 July 2020 Non-Prop Attachment Resolution of Comments Final Safety Evaluation for Westinghouse Electric Company Topical WCAP-16045-P-A, Addendum 2, Revision 0, and WCAP-16045-NP-A, Addendum 2, Revision 0, Updated Nexus Cross-Section Methodology Project stage: Approval ML20191A2832020-07-21021 July 2020 Cover Letter - Final Safety Evaluation for Westinghouse Electric Company Topical Report WCAP-16045-P-A, Addendum 2, Revision 0, and WCAP-16045-NP-A, Addendum 2, Revision 0, Updated Nexus Cross-Section Methodology Project stage: Approval 2019-09-03
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Category:Safety Evaluation
MONTHYEARML20191A2832020-07-21021 July 2020 Cover Letter - Final Safety Evaluation for Westinghouse Electric Company Topical Report WCAP-16045-P-A, Addendum 2, Revision 0, and WCAP-16045-NP-A, Addendum 2, Revision 0, Updated Nexus Cross-Section Methodology ML20196L6332020-07-21021 July 2020 Non-Prop Attachment Resolution of Comments Final Safety Evaluation for Westinghouse Electric Company Topical WCAP-16045-P-A, Addendum 2, Revision 0, and WCAP-16045-NP-A, Addendum 2, Revision 0, Updated Nexus Cross-Section Methodology ML20196L6362020-07-21021 July 2020 Non Prop Enclosure 1 - Final Safety Evaluation for Westinghouse Electric Company Topical Report WCAP-16045-P-A, Addendum 2, Revision 0, and WCAP-16045-NP-A, Addendum 2, Revision 0, Updated Nexus Cross-Section Methodology ML20132A3212020-05-12012 May 2020 Enclosure Final Safety Evaluation for Westinghouse Electric Company Topical Report Quality Management System (Qms), Revision 8.0 ML20078J3752020-04-16016 April 2020 Final Safety Evaluation for Westinghouse Electric Company Request to Modify Safety Evaluation Report on WCAP-12472-P-A, Beacontm Core Monitoring and Operations Support System ML19364A0232020-02-13013 February 2020 Enclosure 1 Final Safety Evaluation for Westinghouse Electric Company Topical Report WCAP-17769-P/NP, Revision 0, Revision 0, Reference Fuel Design SVEA-96 Optima3 ML19364A0242020-02-13013 February 2020 Attachment Resolution of Comments Final Safety Evaluation for Westinghouse Electric Company Topical Report WCAP-17769-P/NP, Revision 0, Reference Fuel Design SVEA-96 Optima3 ML19337A6172020-01-14014 January 2020 Attachment - Resolution of Comments Final Safety Evaluation for Westinghouse Electric Company Topical Report WCAP-18240-P/WCAP-18240-NP, Revision 0, Westinghouse Thermal Design Procedure (Wtdp) ML19337A5442020-01-14014 January 2020 Enclosure 1 - Final Safety Evaluation for Westinghouse Electric Company Topical Report WCAP-18240-P/WCAP-18240-NP, Revision 0, Westinghouse Thermal Design Procedure (Wtdp) ML19283A5402019-10-31031 October 2019 OEDO-19-00479 - Response to Advisory Committee on Reactor Safeguards Letter on Safety Evaluation for WCAP-17794-P, Revision 0, and WCAP-17794-NP, Revision 0, 10x10 Svea Fuel Critical Power Experiments and New CPR (Critical Power Ratio) Corr ML19190A2812019-08-0606 August 2019 Non-Prop Enclosure 1 Final Safety Evaluation for Westinghouse Electric Company Topical Report WCAP-15942-P-A/WCAP-15492-NP-A, Supplement 1, Revision 1, Material Changes for SVEA-96 Optima2 Fuel Assemblies ML19190A2932019-08-0606 August 2019 Cover Letter Final Safety Evaluation for Westinghouse Electric Company Topical Report WCAP-15942-P-A/WCAP-15492-NP-A, Supplement 1, Revision 1, Material Changes for SVEA-96 Optima2 Fuel Assemblies ML19134A1932019-07-31031 July 2019 Radics Final Nonproprietary SE and Transmittal Letter ML19098B0542019-05-0606 May 2019 Non-Prop Enclosure 1: Final Safety Evaluation for Westinghouse Electric Company Topical Report WCAP-18032-P, Revision 0, and WCAP-18032-NP, Revision 0, Calculation of Mixed Core Safety Limit Minimum Critical Power Ratio ML19078A0432019-04-12012 April 2019 Attachment 1 - Resolution of Comments Final Safety Evaluation for Westinghouse Electric Company Topical Report WCAP-16260-P/WCAP-16260-NP, Revision 2, the Spatially Corrected Inverse Count Rate (Scicr) Method for Subcritical Reactivity Meas ML19078A0342019-04-12012 April 2019 Enclosure 1 - Final Safety Evaluation for Westinghouse Electric Company Topical Report WCAP-16260-P/WCAP-16260-NP, Revision 2, the Spatially Corrected Inverse Count Rate Method for Subcritical Reactivity Measurement. ML19029A1052019-02-0707 February 2019 Safety Evaluation for Bechtel Quality Assurance Program for Nuclear Power Plants Topical Report, BQ-TOP-1, 2007 Edition, Revision 003 ML18156A0662018-06-15015 June 2018 Enclosure Final Safety Evaluation for Westinghouse Electric Company Topical Report WCAP-18124-NP, Revision 0, Fluence Determination with Raptor and Ferret (Non-Proprietary) 2020-07-21
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RESOLUTION OF COMMENTS ON DRAFT SAFETY EVALUATION FOR TOPICAL REPORT WCAP-16045-P-A, AND WCAP-16045-NP-A, ADDENDUM 2, REVISION 0, UPDATED NEXUS CROSS-SECTION METHODOLOGY WESTINGHOUSE ELECTRIC COMPANY EPID L-2019-TOP-0026 WESTINGHOUSE ELECTRIC COMPANY By letter dated June 18, 2020 (Agencywide Documents Access and Management System Accession No. ML20121A306), Westinghouse Electric Company (Westinghouse) provided comments on the draft safety evaluation (SE) for Topical Report (TR) WCAP-16045-P-A, Addendum 2, Revision 0, and WCAP-16045-NP-A, Addendum 2, Revision 0, Updated NEXUS Cross-Section Methodology. Westinghouse stated that there is proprietary information in the draft SE. The following is the U.S. Nuclear Regulatory Commission (NRC) staffs resolution of these comments:
Draft SE comments for TR WCAP-16045-P-A, Addendum 2, Revision 0, and WCAP-16045-NP-A, Addendum 2, Revision 0:
- 1. Fifth sentence of the first paragraph of Section 4.2, Qualification of Single Assembly Model Calculations, reads in the draft SE:
The following lattices were evaluated:
Westinghouse-type 17x17 OFA assembly, 5.0 w/o 235U, 156 1.5x integral fuel burnable absorber (IFBA), 24 wet annual burnable absorber (WABA)
Westinghouse-type 14x14 assembly, 4.0 w/o 235U, 64 IFBA Westinghouse-type 15x15 assembly, 4.5 w/o 235U, 116 IFBA Combustion Engineering-type 16x16 assembly, 4.2 w/o (average),
16 6 w/o Gd2O3 rods Westinghouse-type 17x17 standard-size fuel rod assembly, 4.95 w/o 235U, 48 IFBA Westinghouse-type 17x17 OFA assembly, 2.6 w/o 235U Attachment
Westinghouse proposed to replace annual with annular, so the sentence would read:
The following lattices were evaluated:
Westinghouse-type 17x17 OFA assembly, 5.0 w/o 235U, 156 1.5x integral fuel burnable absorber (IFBA), 24 wet annular burnable absorber (WABA)
Westinghouse-type 14x14 assembly, 4.0 w/o 235U, 64 IFBA Westinghouse-type 15x15 assembly, 4.5 w/o 235U, 116 IFBA Combustion Engineering-type 16x16 assembly, 4.2 w/o (average),
16 6 w/o Gd2O3 rods Westinghouse-type 17x17 standard-size fuel rod assembly, 4.95 w/o 235U, 48 IFBA Westinghouse-type 17x17 OFA assembly, 2.6 w/o 235U NRC Resolution for Comment 1 on Draft SE The NRC staff has reviewed the Westinghouse comment and agrees that proposed wording provides additional clarification. The NRC staff has updated the second sentence of the first paragraph of Section 4.2, Qualification of Single Assembly Model Calculations.
- 2. Westinghouse suggested replacing pcm with , i.e. 0.3%, in the fifth sentence of the sixth paragraph in Section 4.2, Qualification of Single Assembly Model Calculations.
NRC Resolution for Comment 2 on Draft SE The NRC staff has reviewed Westinghouse comment and agrees that proposed wording provides additional clarification. The NRC staff has replaced pcm with , i.e. 0.3%, in the fifth sentence of the sixth paragraph in Section 4.2, Qualification of Single Assembly Model Calculations.
Fifth sentence of the sixth paragraph in Section 4.2, Qualification of Single Assembly Model Calculations, now reads:
The comparisons included both rodded and unrodded cases. For the unrodded case, calculated at a burnup of 20000 MWD/MTU, the maximum difference between improved NEXUS/ANC and the current NEXUS/ANC is 0.003, i.e. 0.3%, occurring at the edge of the lattice.
- 3. Last sentence of the second paragraph of Section 4.3, Qualification of Minicore Model Calculations, reads:
In the absence of actual plant data, NEXUS/ANC has not been approved for MOX or non UO2 fueled reactors.
Westinghouse suggested to re-word the sentence to clarify it.
NRC Resolution for Comment 3 on Draft SE The NRC staff agrees that clarification is needed. The NRC staff re-worded last sentence of the second paragraph of Section 4.3, Qualification of Minicore Model Calculations, which now reads:
While the models discussed above used MOX fuel as an extreme example of a neutronically dissimilar fuel assembly, the NRC staff expects that any use of the NEXUS methodology in licensing applications involving MOX fuel would utilize the update process described in the TR and RAI responses.
- 4. Westinghouse provided proprietary markings on the draft SE.
NRC Resolution for Comment 4 on Draft SE:
The NRC staff reviewed the Westinghouse markings and incorporated them into the final SE.
- 5. Westinghouse provided editorial comments.
NRC Resolution for Comment 5 on Draft SE:
The NRC staff reviewed editorial comments provided by Westinghouse and finds them acceptable because the changes are editorial in nature.