ML12048A257
| ML12048A257 | |
| Person / Time | |
|---|---|
| Issue date: | 02/15/2012 |
| From: | Armijo J Advisory Committee on Reactor Safeguards |
| To: | Borchardt E NRC/EDO |
| References | |
| EDATS: OEDO-2012-0088, G20120101, OEDO-2012-0088 | |
| Download: ML12048A257 (4) | |
Text
EDO Principal Correspondence Control FROM:
DUE: 03/16/12 EDO CONTROL: G20120101 DOC DT: 02/15/12 FINAL REPLY:
J.
Sam Armijo, ACRS TO:
Borchardt, EDO FOR SIGNATURE OF :
- GRN CRC NO:
Borchardt, EDO DESC:
ROUTING:
Draft 10 CFR 50.54(f) Letter on Implementation of the Near-Term Task Force Recommendations from the Fukushima Daiichi Event (EDATS: OEDO-2012-0088)
Borchardt Weber Virgilio Ash Mamish OGC/GC
- Kotzalas, OEDO DATE: 02/16/12 ASSIGNED TO:
NRR CONTACT:
Leeds SPECIAL INSTRUCTIONS OR REMARKS:
Please prepare response to ACRS for the signature of the EDO.
Add the Commission and SECY as cc's.
Also, include: RidsAcrsAcnw MailCTR to your distribution list on the concurrence page.
USE SUBJECT LINE IN RESPONSE.
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EDATS Number: OEDO-2012-0088 Source: OEDO Assigned To: NRR OEDO Due Date: 3/16/2012 11:00 PM Other Assignees:
SECY Due Date: NONE
Subject:
Draft 10 CFR 50.54(f) Letter on Implementation of the Near-Term Task Force Recommendations from the Fukushima Daiichi Event
==
Description:==
CC Routing: NONE ADAMS Accession Numbers -
Incoming: NONE Response/Package: NONE Ote Infomaio Cross Reference Number: G20120101 Staff Initiated: NO Related Task:
Recurring Item: NO File Routing: EDATS Agency Lesson Learned: NO OEDO Monthly Report Item: NO Action Type: Letter Priority: Medium Sensitivity: None Signature Level: EDO Urgency: NO Approval Level: No Approval Required OEDO Concurrence: NO OCM Concurrence: NO OCA Concurrence: NO Special Instructions: Please prepare response to ACRS for the signature of the EDO. Add the Commission and SECY as cc's. Also, include: RidsAcrsAcnwMailCTR to your distribution list on the concurrence page. USE SUBJECT LINE IN RESPONSE.
Originator Name: J. Sam Armijo Date of Incoming: 2/15/2012 Originating Organization: ACRS Document Received by OEDO Date: 2/16/2012 Addressee: R. W. Borchardt, EDO Date Response Requested by Originator: NONE Incoming Task Received: Letter Page 1 of I
UNITED STATES NUCLEAR REGULATORY COMMISSION ADVISORY COMMITTEE ON REACTOR SAFEGUARDS WASHINGTON, DC 20555 - 0001 February 15, 2012 Mr. R. W. Borchardt Executive Director for Operations U.S. Nuclear Regulatory Commission Washington, DC 20555-0001
SUBJECT:
DRAFT 10 CFR 50.54(f) LETTER ON IMPLEMENTATION OF THE NEAR-TERM TASK FORCE RECOMMENDATIONS FROM THE FUKUSHIMA DAIICHI EVENT
Dear Mr. Borchardt:
During the 5 9 1 st meeting of the Advisory Committee on Reactor Safeguards, February 9-11, 2012, we were briefed by the NRC staff on the status of the implementation of the Near-Term Task Force Recommendations regarding the Fukushima Daiichi accident. We provided comments to the staff during their presentation and discussion.
We understand that the Orders and the 10 CFR 50.54(f) letter are still being revised and will be submitted to the Commission on February 17, 2012. We plan to review the final versions of these documents during our March 2012 meeting.
Our preliminary review of the Draft 10 CFR 50.54(f) letter identified one item that affects the technical scope and consistency of the requested evaluations of seismic risk. Therefore, we draw your attention to that item for consideration before issuance of the final letter. The discussion of requested information under Recommendation 2.1 refers to NUREG/CR-4334, issued in August 1985, and Part 10 of American Society of Mechanical Engineers/American Nuclear Society (ASME/ANS) Standard RA-Sa-2009, as providing acceptable guidance for performance of a Seismic Margin Analysis (SMA) within the context of this request. However, this guidance is not consistent with the "current applicable Commission requirements and guidance" for the updated seismic hazard and vulnerability evaluations as required in the December 23, 2011, Consolidated Appropriations Act, Public Law 112-74, Section 402.
EDO -- G20120101 The guidance for performance of an SMA in response to this request should cite Part 5 of ASME/ANS Standard RA-Sa-2009, as endorsed by Interim Staff Guidance (ISG) DC/COL-ISG-020, "Interim Staff Guidance on Implementation of a Probabilistic Risk Assessment-Based Seismic Margin Analysis for New Reactors." The ISG specifically notes that the methods that are described in Part 10 of ASME/ANS Standard RA-Sa-2009 are not acceptable for performing a design-specific SMA for a new reactor.
Sincerely, IRA!
J. Sam Armijo Chairman REFERENCES
- 1. NRC Memorandum with Enclosures, "Draft 10 CFR 50.54(f) Letters for Implementing Near-Term Task Force Recommendations 2.1, 2.3, and 9.3," January 13, 2012 (ML12013A224)
- 2. NUREG/CR-4334, "An Approach to the Quantification of Seismic Margins in Nuclear Power Plants," August 1985 (ML090500182)
- 3. ASME/ANS RA-Sa-2009, "Addenda to ASME/ANS RA-S-2008, Standard for Level 1/
Large Early Release Frequency Probabilistic Risk Assessment for Nuclear Power Plant Applications," April 2009
- 4. Consolidated Appropriations Act of 2012, Public Law 112-74
- 5. Interim Staff Guidance DC/COL-ISG-020, "Implementation of a Probabilistic Risk Assessment-Based Seismic Margin Analysis for New Reactors" (ML100491233)