ML23310A120
| ML23310A120 | |
| Person / Time | |
|---|---|
| Site: | 99902078 |
| Issue date: | 11/06/2023 |
| From: | NRC/NRR/DNRL/NRLB |
| To: | NRC/NRR/DNRL/NRLB |
| References | |
| Download: ML23310A120 (16) | |
Text
From:
Getachew Tesfaye Sent:
Monday, November 6, 2023 1:31 PM To:
NuScale-SDA-720DocsPEm Resource
Subject:
NuScale-NRC Management Quarterly Public Meeting 11-07-23 Attachments:
NuScale-NRC Management Quarterly Public Meeting 11-07-23,11-06V.pptx
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NuScale-NRC Management Quarterly Public Meeting 11-07-23 Sent Date:
11/6/2023 1:30:40 PM Received Date:
11/6/2023 1:30:43 PM From:
Getachew Tesfaye Created By:
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11/6/2023 1:30:43 PM NuScale-NRC Management Quarterly Public Meeting 11-07-23,11-06V.pptx 399388 Options Priority:
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NuScale Standard Design Approval Application for the US460 Quarterly NuScale-NRC Management Public Meeting November 7, 2023
Opening Remarks 2
Opening Remarks NuScale US460 Standard Design Approval Application (SDAA) Review Overview Phase A Safety Review High Impact Technical Issues (HITIs)
Focus Items Supporting Reliable Schedule Development (FISDs)
Licensing Topical Reports (LTRs)
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
NRC issued an audit status report for Phase A safety review on September 29, 2023 The NRC staff has presented 712 document requests and items for explanations in the audit, as of November 6, 2023.
467 items have been resolved in the audit, 116 items provided by NuScale are under review by the staff, and 101 items are waiting for NuScale to provide in the audit.
28 items resulted in request for additional information 6
Phase A Safety Review
7 FISD HITI Issues by Category Total Awaiting Response NRC Reviewing Resolved in Audit Sent to RAI process ALL 712 101 116 467 28 FISD 34 3
14 16 1
HITI 28 5
13 9
1 ALL 0
10 20 30 40 50 60 70 0
100 200 300 400 500 600 700 800 3/15/2023 4/15/2023 5/15/2023 6/15/2023 7/15/2023 8/15/2023 9/15/2023 10/15/2023 Weekly/Daily Issue Count (Dotted lines)
Cumulative Issue Count (Solid lines)
Issues Generated vs Issues Resolved over time (including document requests)
Cumulative Issues Resolved Cumulative Issues Generated Issues Resolved Issues Generated
High Impact Technical Issues (HITIs)
- 1. Design and classification of EDAS
- 2. LOCA break spectrum
- 3. Incorporated by Reference (IBR)
- 4. CNV material change
- 5. Lower RPV material change
- 6. Secondary side controller design for DWO events
- 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 8
As of November 3, 2023, the staff has presented 28 HITI document requests and items for explanations in the audit.
9 have been resolved in the audit, 13 items provided by NuScale are under review by the staff, and 5 items are waiting for NuScale to provide in the audit.
1 item is sent to RAI process HITI involving Lower RPV material change has been successfully closed 9
High Impact Technical Issues (HITIs)
Audit Activities
As of November 3, 2023, the staff presented 34 FISD document requests and items for explanations in the audit.
16 items have been resolved in the audit, 14 items provided by NuScale are under review by the staff, 3 items are waiting for NuScale to provide additional information or revised responses, and 1 item sent to RAI process 10 Focus Items For Schedule Development (FISDs)
Pre-SDAA LTRs Five of eight LTRs submitted prior to the SDAA are completed.
The staff is currently reviewing the following three LTRS submitted in the pre-SDAA phase:
Rod Ejection Accident Methodology - Advance SE: November 2023 Subchannel Analysis Methodology - Advance SE was issued on November 6, 2023 Quality Assurance Program Description (QAPD) - Final SE:
December 2023 LTRs submitted with SDAA are included in the SDAA Phase A audit 11 Licensing Topical Reports (LTRs)
Generic LTRs:
EPZ LTR completed in November 2022 Mitigation of BeyondDesignBasis Events LTR submitted on September 11, 2023. The staff has completed the acceptance review and issued a review schedule. The staff plans to complete the Advance SE by August 31, 2024 (12-month review).
Fuel Storage Rack Design LTR submitted on October 9, 2023. The staff plans to complete its acceptance review by December 9, 2023.
Reactor Flange Tool Support Design LTRs pre-application meeting was held on October 26, 2023. LTR submittal by the end of 2023, and ApplicationSpecific Modifications to the Base HIPS Platform LTR - Pre-application meeting November 2023. LTR submittal by the end of 2023.
(NuScale DCA) Request for Exemption to the Reporting Requirements of 10 CFR 50.46(a)(3) [Changes to the approved LOCA methodology] is currently under review 12 Generic Licensing Activities (non-SDAA)
Closing Remarks 13
14 Questions?