ML14031A183

Arkansas Nuclear One, Units 1 and 2, Update to Response to NRC 10 CFR 50.54(f) Request for Information Regarding Near-Term Task Force (NTTF) Recommendation 2.3, Flooding - Review of Available Physical Margin (APM) Assessments

ML14031A183
Person / Time
Site:	Arkansas Nuclear
Issue date:	01/31/2014
From:	Browning J G Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
0CAN011404
Download: ML14031A183 (5)

Text

0CAN011404 January 31, 2014 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk 11555 Rockville Pike Rockville, MD 20852

SUBJECT:

Update to Response to NRC 10 CFR 50.54(f) Request for Information Regarding Near-Term Task Force (NTTF) Recommendation 2.3, Flooding - Review of Available Physical Margin (APM) Assessments Arkansas Nuclear One - Units 1 and 2 Docket Nos. 50-313 and 50-368 License Nos. DPR-51 and NPF-6

REFERENCES:

1. NRC Letter to Entergy, Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) RegardingRecommendations 2.1, 2.3, and 9.3 of the NTTF Review of Insights from the Fukushima Dai-ichi Accident , March 12, 2012 (ML12053A340) (0CNA031208)2. NRC Letter to Nuclear Energy Institute, Endorsement of Nuclear Energy Institute (NEI) 12-07, Guidelines for Performing Verification Walkdowns of Plant Flood Protection Features , dated May 31, 2012 (ML12144A142)3. Entergy Letters to NRC, Flooding Walkdown Report - Entergy's Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Flooding Aspects ofRecommendation 2.3 of the NTTF Review of Insights from theFukushima Dai-ichi Accident , dated November 27, 2012, (1CAN111202 and 2CAN111202)4. NRC Letter to Entergy, Request for Additional Information (RAI)

Associated with NTTF Recommendation 2.3, Flooding Walkdowns , dated December 23, 2013 (ML13325A891)

(0CNA121304)5. Entergy Letter to NRC, Supplemental Response NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Flooding Aspects of Recommendations 2.3 of the NTTF Review of Insightsfrom the Fukushima Dai-ichi Accident , dated November 26, 2013 (0CAN111302)Entergy Operations, Inc.

1448 S.R. 333Russellville, AR 72802 Tel 479-858-3110Jeremy G. Browning Site Vice President Arkansas Nuclear One 0CAN011404 Page 2 of 3

Dear Sir or Madam:

On March 12, 2012, the NRC staff issued Reference 1 requesting information pursuant to Title 10 of the Code of Federal Regulations 50.54(f). Enclosure 4 of that lettercontains specific Requested Information associated with NTTF Recommendation 2.3 for Flooding. Per Reference 2, the NRC endorsed NEI 12-07. By Reference 3, Entergy Operations, Inc. (Entergy) submitted the final reports in response to the request for information.

One of the requirements of NEI 12-07 is to identify the APM associated with each applicable flood protection feature, determine if the margin provided is small, and evaluate any small margins that have potentially significant consequences through thecorrective action process. The results of this effort were to be maintained on site for future NRC audits. Following the NRC's initial review of the walkdown reports, regulatory site audits were conducted at a sampling of plants. Based on the walkdown report reviews and site audits, the NRC identified additional information necessary to complete its assessments. Accordingly, by Reference 4 the NRC has issued RAIs.

As stated in Reference 5 Entergy discovered some discrepancies during the review of the Flooding Walkdown Reports provided by Reference 3 and committed to provide revised Flooding Walkdown Reports by February 28, 2014. The resolution of these discrepancies is currently ongoing, and it has been determined that additional time is needed to complete the work needed to support revising the Flooding Walkdown Reports. The determination of APM is dependent on finalization of these Flooding Walkdown Reports; therefore, Entergy will respond to the RAIs provided by Reference 4 and provide revised Flooding Walkdown Reports by April 30, 2014.

This letter contains a revised regulatory commitment, which is identified in the attachment. Should you have any questions regarding this submittal, please contact Stephenie Pyle at 479.858.4704.

I declare under penalty of perjury that the foregoing is true and correct. Executed on January 31, 2014.

Sincerely, Original signed by Jeremy G. Browning JGB/nbm

Attachment:

List of Regulatory Commitments 0CAN011404 Page 3 of 3cc: Mr. Marc L. Dapas Regional Administrator U. S. Nuclear Regulatory Commission, Region IV 1600 East Lamar Boulevard Arlington, TX 76011-4511 NRC Senior Resident Inspector Arkansas Nuclear One P.O. Box 310 London, AR 72847 U. S. Nuclear Regulatory Commission Attn: Mr. Alan Wang MS O-88B1 One White Flint North 11555 Rockville Pike Rockville, MD 20852 U. S. Nuclear Regulatory Commission Attn: Mr. Michael Orenak MS O-8G9A One White Flint North 11555 Rockville Pike Rockville, MD 20852 Attachment to 0CAN011404 List of Regulatory Commitments Attachment to 0CAN011404 Page 1 of 1 List of Regulatory CommitmentsThe following table identifies those actions committed to by Entergy Operations, Inc. (Entergy) in this document. Any other statements in this submittal are provided for information purposes and are not considered to be regulatory commitments.

COMMITMENT TYPE (Check One)

SCHEDULED COMPLETION DATE (If Required)

ONE-TIME ACTION CONTINUING COMPLIANCE Entergy will respond to the requests for additional information provided by Reference 4 and provide revised Flooding Walkdown Reports.

X April 30, 2014