ML24269A077
| ML24269A077 | |
| Person / Time | |
|---|---|
| Issue date: | 10/02/2024 |
| From: | Getachew Tesfaye NRC/NRR/DNRL/NRLB |
| To: | |
| Shared Package | |
| ML24269A076 | List: |
| References | |
| Download: ML24269A077 (1) | |
Text
NuScale Standard Design Approval Application for the US460 Quarterly NuScale-NRC Management Public Meeting October 2, 2024
Opening Remarks 2
Opening Remarks NuScale US460 Standard Design Approval Application (SDAA) Review Overview Phase A Safety Review Requests for Additional Information (RAI)
High Impact Technical Issues (HITIs)
Topical Reports (TRs)
Generic Licensing Activities (Non-SDAA)
Closing remarks 3
Agenda
US460 SDAA Review Overview SDAA staged submittal was completed in January 2023 The NRC staff issued the results of its acceptance review with a request for supplemental information (RSI) on March 17, 2023 The staff began detailed safety evaluation of portions of the application not impacted by the RSI on March 20, 2023 Following the receipt of the supplemental information on July 14 and 17, 2023, a docketing letter was issued on July 31, 2023, that included a four phase, 24-month review schedule The staff issued a resource estimate letter on September 22, 2023. The SDAA review will require approximately 50,000 staff hours and $650,000 for contractor support 4
US460 SDAA Review Overview Phase Phase Name End date Phase A Advanced Safety Evaluation Report (ASER) without open items (draft completion date; internal NRC schedule)
November 2024 Phase B ASER review (technical editing),
Management concurrence February 2025 Phase C ACRS Review of ASER May 2025 Phase D Final Safety Evaluation Report (FSER) and SDA July 2025 5
Four Phase Review milestones
Completed SDAA Phase reviews:
Phase A - Chapters 2, 3 (Except 3.7, 3.8, 3.9.2), 7, 8, 9, 10, 11, 12,13, 14, 17 (except 17.4), 18, and 19 (19.4,19.5).
Phase B - Chapters 2, 7, 9, 10, 11,12, 13, 17 (except 17.4), 18, and 19 (19.4,19.5)
Phase C - Chapters 2, 7, 9, 10, 11, 12, 13, 17 (except 17.4), and 18 The Phase A review audit that begun on March 17, 2023, ended on August 31, 2024.
The staff is reviewing confirmatory items and RAI supporting documents under a separate audit.
During the audit, the NRC staff presented 1202 document requests and items for explanation:
1048 items were resolved in the audit, The remaining open items were issued or are in the process to be issued as formal requests for additional information (RAIs).
6 Phase A Safety Review
The NRC staff has issued a total of 52 RAI questions, as of September 25, 2024 NuScale responded to RAI questions on or about agreed upon schedule 34 RAI questions have been resolved closed 3 RAI responses are under NRC review 15 RAI are awaiting responses 7
Requests for Additional Information (RAI)
High Impact Technical Issues (HITIs)
- 1. Design and classification of EDAS - Resolved
- 2. LOCA break spectrum
- 3. Incorporated by Reference (IBR) - Resolved
- 4. CNV material change - Resolved
- 5. Lower RPV material change - Resolved
- 6. Secondary side controller design for DWO events - Resolved
- 7. DWO and steam generator inlet flow restrictor design changes
- 8. ASME qualification of the helical coil steam generator for the onset of DWO-induced loads
- 9. Upper-to-lower RPV flange bolted joint shear loading that results from differential thermal expansion - Resolved
- 10. LOCA Break at CVCS/CIV Connection (New) 8
Eight TRs* submitted prior to the SDAA are completed.
Four TRs submitted with SDAA are included in the SDAA Phase A audit
Topical Reports (TRs)
10 Generic Licensing Activities (non-SDAA)
Generic TRs:
Mitigation of BeyondDesignBasis Events TR submitted on September 11, 2023. Advance SE with no open item was completed in August 2024.
ACRS - October 2024 Fuel Storage Rack Design TR submitted on October 9, 2023. The staff has accepted the TR for detailed review and plans a complete the Advance SE by May 2025.
NuScale submitted a request for NRC Actions to Promptly Enable Construction of ASME Code items without an Owner -
Code Case N-883. This is currently under review by the staff
Closing Remarks 11
12 Questions?