ML14069A027

PINGP, Unit 2 - Updated Final Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident

ML14069A027
Person / Time
Site:	Prairie Island
Issue date:	03/04/2014
From:	Davison K Northern States Power Co, Xcel Energy
To:	Document Control Desk, Office of Nuclear Reactor Regulation
Shared Package
ML14069A024	List: L-PI-14-020, Enclosure 3 - Prairie Island Nuclear Generating Plant, Unit 2 - NTTF Recommendation 2.3 - Seismic Updated Seismic Walkdown Report (Redacted) ML14069A027
References
L-PI-14-020
Download: ML14069A027 (4)

Text

CONTAINS SUNSI -WITHHOLD FROM PUBLIC DISCLOSURE UNDER 2.390 XcelEnergys Prairie Island Nuclear Generating Plant 1717 Wakonade Drive East Welch, MN 55089-9642 March 4, 2014 L-PI-14-020 10 CFR 50.54(f)U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Prairie Island Nuclear Generating Plant -Unit 2 Docket No. 50-306 Renewed Operating License No. DPR-60 PINGP Unit 2 -Updated Final Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident

References:

1. NRC Letter, "Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Recommendations 2.1, 2.3, and 9.3, of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident," dated March 12, 2012, ADAMS Accession No. ML1 2053A340.2. NSPM Letter to NRC, "PINGP Unit 2 -Final Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident," dated November 26, 2012, ADAMS Accession No. ML1 2334A470.3. NRC Letter, "Request for Additional Information Associated with Near-Term Task Force Recommendation 2.3, Seismic Walkdowns," dated November 1, 2013, ADAMS Accession No. ML13304B418.

4. NSPM Letter to NRC, "Prairie Island Nuclear Generating Plant, Units 1 and 2, Response to Requests for Additional Information Associated with Near-Term Task Force Recommendation 2.3, Seismic Walkdowns," dated November 27, 2013, ADAMS Accession No. ML13333B457.

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Document Control Desk Page 2 5. NRC Memorandum, "Summary of the May 7, 2013, Public Conference Call on the Delayed Inspection Items Associated with Japan Lessons Learned Near-Term Task Force Recommendation

2.3 Seismic

Walkdowns," dated June 5, 2013, ADAMS Accession No. ML13136A003.

6. NRC Memorandum, "Summary of the August 1, 2013, Public Conference Call on the Delayed Inspection Items Associated with Japan Lessons Learned Near-Term Task Force Recommendation

2.3 Seismic

Walkdowns," dated August 14, 2013, ADAMS Accession No. ML13218B361.

7. NSPM Letter to NRC, "PINGP Unit 2 -Proposed Resolution of the Remaining Seismic Walkdowns Associated with NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident," dated September 12, 2013, ADAMS Accession No. ML13259A027.

On March 12, 2012, the Nuclear Regulatory Commission (NRC) Staff issued a request for information regarding Near-Term Task Force (NTTF) insights from the Fukushima Dai-ichi accident, to all NRC power reactor licensees and holders of construction permits in active or deferred status (Reference 1). Enclosure 3 of the March 12, 2012 letter contains specific Requested Actions, Requested Information, and Required Responses associated with NTTF Recommendation 2.3, Seismic. Northern States Power Company, a Minnesota corporation (NSPM), d/b/a Xcel Energy, submitted the required response to the Requested Information for NTTF Recommendation 2.3, Seismic, for Prairie Island Nuclear Generating Plant (PINGP) in a letter dated November 26, 2012 (Reference 2). In Reference 2, NSPM committed to complete seismic walkdowns of inaccessible components during the Fall Refueling Outage (RFO) 2R29.NSPM also committed to provide an updated seismic walkdown report with the results of the walkdowns of the inaccessible components 60 days following the completion of RFO 2R29.The NRC scheduled a public conference call on May 7, 2013 to discuss NRC Staff concerns regarding delayed inspection items as identified in seismic walkdown reports for a number of operating reactors (Reference 5). During the meeting, the NRC Staff stated its expectation that walkdown activities should be completed as expeditiously as possible and by the next refueling outage, if possible.

The NRC Staff requested that licensees voluntarily submit a supplemental letter to their walkdown reports to propose an alternate approach for completing the inaccessible walkdowns by the next refueling outage. Another public conference call was scheduled on August 1, 2013 for the NRC Staff to provide further clarification on the information that should be provided in the licensee's voluntary letters (Reference 6).

Document Control Desk Page 3 As requested in References 5 and 6, NSPM submitted a proposal for final disposition of the remaining NTTF Recommendation

2.3 Seismic

Walkdowns for PINGP Unit 2 on September 12, 2013 (Reference 7). This letter revised the commitments made in Reference 2 to complete the Seismic Walkdowns of the inaccessible components listed in the enclosure of Reference 2 by the end of RFO 2R28. The letter also revised the commitment made in Reference 2 to provide an updated seismic walkdown report with the results of the inaccessible components 60 days following the completion of RFO 2R28.The purpose of this letter is to submit, as an enclosure, an updated seismic walkdown report with a summary of the results from the walkdowns of the inaccessible components completed during RFO 2R28. Enclosure 1 provides the updated seismic walkdown report.During preparations of the updated seismic walkdown report, NSPM identified items in the Reference 2 report that required correction.

The items identified do not impact the original conclusion of the Reference 2 report. Enclosure 2 provides replacement pages to correct the original Reference 2 report.Enclosures 1 and 2 contain Sensitive Unclassified Non-Safeguards Information (SUNSI)of which the loss, issue, modification, or unauthorized access can reasonably be foreseen to harm the public interest, or the commercial or financial interests of NSPM.NSPM requests that this SUNSI information be withheld under 10 CFR 2.390(d)(1).

Pages which contain SUNSI information have been marked with a header, and the sensitive information, such as locations and pictures of safety-related components, has been marked. Enclosures 3 and 4 provide redacted versions of Enclosures 1 and 2, respectively, for public disclosure.

If there are any questions, or if additional information is needed, please contact Ms.Jennie Wike, Licensing Engineer, at 612-330-5788.

Summary of Commitments This report closes the commitments in Reference

7. This letter contains no new commitments and makes no revisions to existing commitments.

Document Control Desk Page 4 I declare under penalty of perjury that the foregoing is true and correct.Executed on March 4, 2014.Kevin Davison Site Vice President, Prairie Island Nuclear Generating Plant Northern States Power Company -Minnesota Enclosures (4)cc: Administrator, Region III, USNRC Director, Office of Nuclear Reactor Regulation (NRR), USNRC NRR Project Manager, Prairie Island Nuclear Generating Plant, USNRC Senior Resident Inspector, Prairie Island Nuclear Generating Plant, USNRC