GNRO-2012/00053, Response to NRC Request for Information (RFI) Pursuant to 10 CFR 50.54(f) Re the Flooding Aspects of Recommendations 2.1 and 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident

Response to NRC Request for Information (RFI) Pursuant to 10 CFR 50.54(f) Re the Flooding Aspects of Recommendations 2.1 and 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident

ML12163A551
Person / Time
Site:	Grand Gulf
Issue date:	06/08/2012
From:	Mike Perito Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
GNRO-2012/00053
Download: ML12163A551 (5)

Text

~Entergy Entergy Operations, Inc.

P. O. Box 756 Port Gibson. MS 39150 Michael Perlto Vice President, Operations Grand Gulf Nuclear Station Tel. (601) 437-6409 GNRO-2012/00053 June 8,2012 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk 11555 Rockville Pike Rockville, MD 20852

SUBJECT:

Entergy's Response to NRC Request for Information (RFI) Pursuant to 10 CFR 50.54{t) Regarding the Flooding Aspects of Recommendations 2.1 and 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident Grand Gulf Nuclear Station, Unit 1 Docket No. 50-416 license No. NPF-29

References:

1. NRC letter to Entergy, RFI Pursuantto Title 10 of the Gode of Federal Regulations 50.54(t) 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 (GNRI-2012/00059)

(ML12053A340)

2. NRC Letter to Entergy, Prioritization of Response Due Dates for Site Flooding Hazard Evaluations, dated May 11, 2012 (GNRI-2012100115) (ML12097A509)

3. NRC letter, Endorsement of Nuclear Energy Institute (NEI) 12-07, "Guidelines for Performing Verification Walkdowns of Plant Flood Protection Features," dated May 31,2012

Dear Sir or Madam:

On March 12,2012, the NRC issued Reference 1 to all power reactor licensees.

Enclosures 2 and 4 of Reference 1 contain specific requested actions, requested information, and required responses associated with Recommendations 2.1 and 2.3 for flooding evaluations and walkdowns. This letter provides Entergy Operations', Inc.

(Entergy's) 90-day response to Reference 1 for Grand Gulf Nuclear Station (GGNS).

GNRO-2012/00053 Page 2 of 3 Recommendation 2.1: Flooding The response date for GGNS's flood hazard evaluation was identified in Reference 2 as March 12, 2013 which corresponds to one year from the date of Reference 1.

Entergy plans to meet the requested date for the other required responses in of Reference 1. Specifically, an approach for developing an Integrated Assessment for GGNS will be submitted 60 days after NRC endorsement of the Integrated Assessment Guidance. In addition, an Integrated Assessment report for GGNS, if it is necessary, will be submitted two years after the flood evaluation is submitted.

Recommendation 2.3: Flooding For flooding recommendation 2.3 (walkdowns), Enclosure 4 of Reference 1 states that each licensee is to confirm that it will use the NRC-endorsed flooding walkdown procedure or provide a description of the process it will use. Entergy confirms that it will use the flooding walkdown procedure (Nuclear Energy Institute 12-07, Guidelines for Performing Verification Walkdowns of Plant Flood Protection Features) endorsed by Reference 3 as the basis for the flooding walkdowns at GGNS.

Entergy plans to comply with the response timeline in Enclosure 4 of Reference 1.

Specifically, Entergy will submit a report documenting the results of its flooding design basis walkdowns at GGNS by November 27,2012, which corresponds to 180 days after NRC endorsement of the generic guidance.

The new commitments contained in this submittal are summarized in the Attachment.

Should you have any questions concerning the content of this letter, please contact Christina L. Perino at 601-437-6299.

I declare under penalty of perjury that the foregoing is true and correct. Executed on June 8, 2012.

MP/jas

Attachment:

List of Regulatory Commitments cc: (see next page)

GNRO-2012/00053 Page 3 of 3 cc: Mr. Elmo Collins Regional Administrator U. S. Nuclear Regulatory Commission, Region IV 1600 East Lamar Boulevard Arlington, TX 76011-4511 U. S. Nuclear Regulatory Commission Attn: Director, Office of Nuclear Reactor Regulation One White Flint North 11555 Rockville Pike Rockville, MD 20852 NRC Senior Resident Inspector Grand Gulf Nuclear Station Port Gibson, MS 39150 U. S. Nuclear Regulatory Commission ATTN: Mr. A. Wang, NRR/DORL Mail Stop OWFN/8 G14 11555 Rockville Pike Rockville, MD 20852-2378

Attachment to GNRO-2012100053 List of Regulatory Commitments

Attachment to GNRO-2012/00053 Page 1 of 1 List of Regulatory Commitments The following table identifies those actions committed to by Entergy in this document. Any other statements in this submittal are provided for information purposes and are not considered to be regulatory commitments.

TYPE SCHEDULED (Check One) COMPLETION COMMITMENT DATE ONE*

TIME CONTINUING (If Required)

ACTION COMPLIANCE Submit flood hazard evaluation to the X March 12, 2013 NRC.

An approach for developing an Integrated X 60-days after NRC Assessment for GGNS will be submitted. endorsement of the Integrated Assessment Guidance An Integrated Assessment report for X March 12, 2015 GGNS, if it is necessary, will be submitted two years after the flood evaluation is (if necessary) completed.

Entergy will use the flooding walkdown X November 27,2012 procedure (Nuclear Energy Institute 12-07, Guidelines for Performing Verification Walkdowns of Plant Flood Protection Features) endorsed by Reference 3 as the basis for the flooding walkdowns and plans to comply with the response timeline in Enclosure 4 of Reference 1 by submitting a report documenting the results of its flooding design basis walkdowns at GGNS 180 days after NRC endorsement of the aeneric auidance.