ML19337B778
| ML19337B778 | |
| Person / Time | |
|---|---|
| Issue date: | 12/04/2019 |
| From: | Rempe J Advisory Committee on Reactor Safeguards |
| To: | Riccardella P Advisory Committee on Reactor Safeguards |
| Snodderly, M, ACRS | |
| Shared Package | |
| ML19337B671 | List: |
| References | |
| Download: ML19337B778 (3) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION ADVISORY COMMITTEE ON REACTOR SAFEGUARDS WASHINGTON, DC 20555 - 0001 December 04, 2019 MEMORANDUM TO: Peter Riccardella, Chairman Advisory Committee on Reactor Safeguards FROM: Joy Rempe, Member-At-Large /RA/
Advisory Committee on Reactor Safeguards
SUBJECT:
PROPOSED RECOMMENDATION FOR ACRS REVIEW OF NUSCALE POWER, LLC, DESIGN CERTIFICATION APPLICATION - SAFETY EVALUATION WITH NO OPEN ITEMS FOR CHAPTER 21, MULTI-MODULE DESIGN CONSIDERATIONS In response to the Committees request, I reviewed the NRC staffs safety evaluation with no open items for Chapter 21, Multi-Module Design Considerations, dated October 15, 2019 (ML19169A272). This memo provides my recommended course of action concerning further review of this chapter of the design certification application (DCA) and the associated staff safety evaluation report (SER).
SER Phase 4 Summary Chapter 21 of the SER documents the staff review of Revision 3 of Chapter 21, Multi-Module Design Considerations, of the NuScale DCA, Part 2, Tier 2 Final Safety Analysis Report.
Chapter 21 identifies sections of other SER chapters (e.g., Chapters 6, 7, 8, 9, 10, and 11) where findings and conclusions regarding interactions of systems shared between multiple NuScale Power Modules of the NuScale Power Plant are documented. No open items were identified in either the Phase 2 or Phase 4 versions of the SER for this chapter.
Applicable Concerns from ACRS Phase 3 Letter Report We did not identify any recommendations or conclusions in our Phase 3 letter report that pertained to Chapter 21. Our letter report on Chapter 21 did provide the following observation:
NuScale provides information regarding the number of modules supported by various shared systems. However, the documentation is unclear whether all the supported modules must be shut down when a shared system becomes unavailable. We will continue exploring this topic in upcoming meetings with the staff and NuScale.
Our remaining chapter and focus area reviews of the NuScale DCA continue to explore this topic to ensure that any concerns regarding shared systems and potential adverse impacts on safety are addressed.
P. Riccardella NRC Staff Response to ACRS Letter Report Not Applicable Open Items from Phase 3 Requiring Further ACRS Review None Recommendation No open or unresolved items were identified in the Chapter 21 Phase 2 review by the staff. In our Phase 3 review, we did not provide any recommendations pertaining to Chapter 21. There are no unresolved items related to NuScale DCA Chapter 21 and the associated SER. As lead ACRS reviewer for NuScale Chapter 21, I recommend that the Committee not perform any additional Phase 5 review of this chapter. We expect that we will have questions related to multi-module issues in remaining chapters and focus area reviews.
P. Riccardella December 04, 2019
SUBJECT:
PROPOSED RECOMMENDATION FOR ACRS REVIEW OF NUSCALE POWER, LLC, DESIGN CERTIFICATION APPLICATION - SAFETY EVALUATION WITH NO OPEN ITEMS FOR CHAPTER 21, MULTI-MODULE DESIGN CONSIDERATIONS Package No.: ML19337B671 Accession No: ML19337B778 Publicly Available Y Sensitive N Viewing Rights: NRC Users or ACRS Only or See Restricted distribution *via email OFFICE ACRS/TSB SUNSI Review ACRS/TSB ACRS NAME MSnodderly MSnodderly LBurkhart JRempe (LBurkhart for)
DATE 12/3/2019 12/3/2019 12/4/2019 12/4/2019 OFFICIAL RECORD COPY