Letter Sequence Other |
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Results
Other: ML24107B050, ML24107B051, ML24107B062, ML24197A184, ML24267A221, ML25206A228, ML25206A231, ML25210A320, ML25210A321, ML25252A419, ML25252A423, ML25253A042, ML25253A075
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MONTHYEARML24085A8222024-03-26026 March 2024
Transmittal of Terrapower, LLC Partial Flow Blockage Methodology, Revision 0
Project stage: Request
ML24107B0512024-04-22022 April 2024
Email - Completeness Determination for Terrapower, LLC Partial Flow Blockage Methodology, Revision 1 (L-2024-TOP-0010)
Project stage: Other
ML24107B0502024-04-22022 April 2024
NRC Form 898 - Completeness Determination for Terrapower, LLC Partial Flow Blockage Methodology, Revision 1 (L-2024-TOP-0010)
Project stage: Other
ML24197A1842024-07-15015 July 2024
Public - Terrapower, LLC - Audit Plan for Topical Report TP-LIC-RPT-0008, Partial Flow Blockage Methodology, Revision 1
Project stage: Other
ML24267A2212024-09-24024 September 2024
NRC Form 897: Request for Withholding Proprietary Information from Public Disclosure - Terrapower, LLC Topical Report, Partial Flow Blockage Methodology, Revision 1
Project stage: Other
ML24107B0622024-09-24024 September 2024
NRC Form 897: Request for Withholding Proprietary Information from Public Disclosure - Terrapower, LLC Topical Report, Partial Flow Blockage Methodology, Revision 1
Project stage: Other
ML25206A2312025-07-25025 July 2025
Email: Request for Withholding Proprietary Information from Public Disclosure - Terrapower, LLC Topical Report, NAT-9395 Partial Flow Blockage Methodology, Revision 0
Project stage: Other
ML25206A2282025-07-25025 July 2025
NRC 897: Request for Withholding Proprietary Information from Public Disclosure - Terrapower, LLC, Topical Report, NAT-9395 Partial Flow Blockage Methodology, Revision 0
Project stage: Other
ML25210A2062025-08-0707 August 2025
P Enclosuterrapower, Llc. - Final Safety Evaluation of Topical Report Nat-9395, Partial Flow Blockage Methodology, Revision 0
Project stage: Approval
ML25210A2042025-08-0707 August 2025
Letter: Terrapower, Llc. - Final Safety Evaluation of Topical Report Nat-9395, Partial Flow Blockage Methodology, Revision 0
Project stage: Approval
ML25210A3212025-08-26026 August 2025
P Enclosuterrapower, LLC - Summary Report on the Regulatory Audit of Topical Report, TP-LIC-RPT-0008, Partial Flow Blockage Methodology, Revision 1
Project stage: Other
ML25210A3202025-08-26026 August 2025
Letter: Terrapower, LLC - Summary Report on the Regulatory Audit of Topical Report, TP-LIC-RPT-0008, Partial Flow Blockage Methodology, Revision 1
Project stage: Other
ML25253A0752025-09-10010 September 2025
Email - Request for Withholding Proprietary Information from Public Disclosure - Terrapower, LLC, NAT-9395-A, Revision 0, Partial Flow Blockage
Project stage: Other
ML25253A0422025-09-10010 September 2025
NRC 897 - Request for Withholding Proprietary Information from Public Disclosure - Terrapower, LLC, NAT-9395-A, Revision 0, Partial Flow Blockage
Project stage: Other
ML25252A4232025-09-10010 September 2025
NRC 896 - a Verification of Terrapower, LLC, NAT-9395-A, Partial Flow Blockage Methodology, Revision 0
Project stage: Other
ML25252A4192025-09-19019 September 2025
NRC 896 - a Verification of Terrapower, LLC NAT-9394-A, Design Basis Accident Methodology for Events with Radiological Release, Revision 0
Project stage: Other
2025-07-25
[Table View] |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 August 26, 2025 George Wilson Senior Vice President, Regulatory Affairs TerraPower, LLC 15800 Northup Way Bellevue, WA 98008
SUBJECT:
TERRAPOWER, LLC -
SUMMARY
REPORT ON THE REGULATORY AUDIT OF TOPICAL REPORT, TP-LIC-RPT-0008, "PARTIAL FLOW BLOCKAGE METHODOLOGY, REVISION 1 (EPID L-2024-TOP-0010)
Dear George Wilson:
By letter dated March 26, 2024, TerraPower, LLC (TerraPower) submitted topical report (TR)
TP-LIC-RPT-0008, Partial Flow Blockage Methodology," Revision 1 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML24085A822) to the U.S. Nuclear Regulatory Commission (NRC) staff. The TR provides an overview and description of evaluation models developed for the Natrium reactor to evaluate partial flow blockage events within a sodium fast reactor. On April 22, 2024, the NRC staff found that the material presented in the TR provides technical information in sufficient detail to enable the NRC staff to conduct a detailed technical review (ML24107B049).
The NRC staff provided its audit plan for the subject TR to TerraPower on July 15, 2024 (ML24197A184). The audit was conducted virtually from July 25, 2024, through April 10, 2025, using TerraPowers electronic reading room. The NRC staff held an audit exit meeting with TerraPower on April 10, 2025.
Enclosed is a summary report on the regulatory audit conducted by the NRC staff in connection with its ongoing review of the TR.
The audit summary report does not make any licensing conclusions or findings, but it is part of the administrative record of the NRC staffs review of the TR and may provide information supporting the NRC staffs safety evaluation. No requests for additional information were identified as part of the audit and there are no open items resulting from the audit. The report constitutes the final report on the audit.
If you have any questions regarding this matter, please contact me at (301) 415-5301 or via email at Stephanie.Devlin-Gill@nrc.gov.
Sincerely,
/RA/
Stephanie Devlin-Gill, Senior Project Manager Advanced Reactor Licensing Branch 1 Division of Advanced Reactors and Non-Power Production and Utilization Facilities Office of Nuclear Reactor Regulation Project No.: 99902100
Enclosure:
As stated cc: TerraPower Natrium via GovDelivery
Package: ML25210A318 Letter: ML25210A320 Public
Enclosure:
ML25210A321 Non-Public
Enclosure:
ML25210A322 OFFICE NRR/DANU/UAL1:PM NRR/DANU/UAL1:LA NRR/DANU/UTB2:BC NAME SDevlin-Gill DGreene CdeMessieres DATE 04/15/2025 04/16/2025 08/18/2025 OFFICE NRR/DANU/UAL1:BC NAME JBorromeo DATE 08/22/2025