DCL-12-059, Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Flooding Aspects of Recommendations 2.1 and 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-Ichi Accident

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Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Flooding Aspects of Recommendations 2.1 and 2.3 of the Near-Term Task Force Review of Insights from the Fukushima Dai-Ichi Accident
ML12159A582
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 06/07/2012
From: Halpin E
Pacific Gas & Electric Co
To:
Office of Nuclear Reactor Regulation, Document Control Desk
References
DCL-12-059
Download: ML12159A582 (4)
v • d • e


Text

Pacific Gas and Electric Company Edward D. Halpin Diablo Canyon Power Plant Senior Vice President Mail Code 104/6 Nuclear Generation & Chief Nuclear Officer P. O. Box 56 Avila Beach, CA 93424 805.545.4100 June 7, 2012 E-Mail: E1H8@pge.com PG&E Letter DCL-12-059 U.S. Nuclear Regulatory Commission 10 CFR 50.54(f)

ATTN: Document Control Desk 11555 RockviUe Pike Rockville, MD 20852 Docket No. 50-275, OL-DPR-80 Docket No. 50-323, OL-DPR-82 Diablo Canyon Units 1 and 2 Pacific Gas and Electric Company's Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) 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

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
2. NRC Letter, Prioritization of Response Due Dates for Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Flooding Hazard Reevaluations for Recommendation 2.1 of the Near Term Task Force Review of Insights from the Fukushima Dai-Ichi Accident, dated May 11,2012
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 Commissioners and Staff:

On March 12, 2012, the Nuclear Regulatory Commission (NRC) issued Reference 1 to all power reactor licensees and holders of construction permits in active or deferred status. 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 Pacific Gas and Electric Company's (PG&E's) 90 day response to Reference 1 for Diablo Canyon Power Plant (DCPP).

A member of the STARS (Strategic Teaming and Resou r ce Sharing) All i ance Callaway

  • Comanche Peak
  • Diablo Canyon
  • Palo Verde
  • San Onofre
  • Wolf Creek

m Document Control Desk PG&E Letter DCL-12-059 June 7,2012 I & Page 2 Recommendation 2.1: Flooding The response date for DCPP's flood hazard evaluation was id entified in Reference 2 .

as March 12,2015, which corresponds to 3 years from the date of Reference 1.

PG&E plans to comply with the requested response date.

PG&E will meet the requested date for the other required responses in Enclosure 2 of Reference 1. Specifically, an approach for developing an Integrated Assessment for DCPP will be submitted 60 days after the NRC endorses Integrated Assessment Guidance. In addition, an Integrated Assessment report for DCPP, if it is necessary, will be submitted on March 13, 2017.

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.

PG&E confirms that it will use the flooding walkdown procedure (NEI 12-07, Guidelines for Performing Verification Walkdowns of Plant Flood Protection Features) as endorsed by Reference 3 as the basis for the flooding walkdowns at DCPP.

PG&E plans to comply with the response timeline in Enclosure 4 of Reference 1.

Specifically, PG&E will submit a report documenting the results of its flooding design basis walkdowns at DCPP on November 27,2012, which corresponds to 180 days after NRC endorsementof the generic guidance.

PG&E is making regulatory commitments (as defined by NEI 99-04) in the Enclosure of this letter. This letter includes no revisions to existing regulatory commitments.

If you have any questions, or require additional information, please contact Mr. Jearl Strickland at (805) 781-9785.

I declare under penalty of perjury that the foregoing is true and correct.

Executed on June 7,2012.

Sincerely, Edward D. Halpin Senior Vice President - Chief Nuclear Officer A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway

  • Comanche Peak
  • Diablo Canyon
  • Palo Verde
  • San Onofre
  • Wolf Creek

m I

Document Control Desk June 7, 2012

& Page 3 PG&E Letter DCL-12-059 ckf6/SAPN 50465913-12 Enclosure cc: Diablo Distribution cc:/enc: Elmo E. Collins, NRC Region IV Eric J. Leeds, NRC Director, Office of Nuclear Reactor Regulation Michael S. Peck, NRC, Senior Resident Inspector Joseph M. Sebrosky, NRR Project Manager A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway

  • Comanche Peak
  • Diablo Canyon
  • Palo Verde
  • San Onofre
  • Wolf Creek

Enclosure PG&E Letter DCL-12-059 Page 1 of 1 Regulatory Commitments PG&E is making the following regulatory commitments (as defined by NEI 99-04) in this submittal: .

Commitment Due Date The response date for DCPP's flood hazard evaluation was March 12, 2015 identified in Reference 2 as March 12, 2015, which corresponds to 3 years from the date of Reference 1. PG&E plans to comply with the requested response date.

Specifically, an approach for developing an Integrated 60 days after the Assessment for DCPP will be submitted. NRC endorses Integrated Assessment Guidance An Integrated Assessment report for DCPP, if it is necessary, March 13,2017 will be submitted.

PG&E will use NEI 12-07 "Guidelines for Performing November 27,2012 Verification Walkdowns of Plant Flood Protection Features" as the basis for the flooding walkdowns at DCPP following its endorsement by the NRC.

PG&E will submit a report documenting the results of its November 27,2012 flooding design basis walkdowns at DCPP.

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