ML15153A077

Nuclear Regulatory Commission Plan for the Audit of Dominion Nuclear Connecticut, Inc.'S Flood Hazard Reevaluation Report Submittal Relating to the Near-Term Task Force Recommendation 2.1 - Flooding for Millstone Nuclear Power Station, Unit

ML15153A077
Person / Time
Site:	Millstone
Issue date:	06/15/2015
From:	Victor Hall Japan Lessons-Learned Division
To:	Heacock D Dominion Nuclear Connecticut
Govan T, NRR/JLD, 415-6197
References
TAC MF6109, TAC MF6110
Download: ML15153A077 (5)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 June 15, 2015 Mr. David A Heacock President and Chief Nuclear Officer Dominion Nuclear Connecticut, Inc.

Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060

SUBJECT:

NUCLEAR REGULATORY COMMISSION PLAN FOR THE AUDIT OF DOMINION NUCLEAR CONNECTICUT, INC.'S FLOOD HAZARD REEVALUATION REPORT SUBMITTAL RELATING TO THE NEAR-TERM TASK FORCE RECOMMENDATION 2.1-FLOODING FOR MILLSTONE POWER STATION, UNITS 1AND2 (TAC NOS. MF6109 AND MF6110)

Dear Mr. Heacock:

This letter documents the U.S. Nuclear Regulatory Commission (NRC) staff's plan to perform a regulatory audit of Dominion Nuclear Connecticut, lnc.'s (the licensee) supporting calculations for the Flood Hazard Reevaluation Report (FHRR) submittal related to the Near-Term Task Force Recommendation 2.1, Flooding for Millstone Power Station, Units 1 and 2 (Millstone).

This technical audit will be performed consistent with NRC Office of Nuclear Reactor Regulation, Office Instruction LIC-111, "Regulatory Audits," dated December 29, 2008 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML082900195). The audit will be conducted over multiple sessions, as needed, and the NRC staff will develop an audit summary report to document its observations and conclusions within 90 days of the final audit session.

The audit will provide the NRC staff with a better understanding of the Millstone FHRR, which was submitted March 12, 2015 (ADAMS Accession No. ML15078A203). Specifically, the audit will provide the NRC with a better understanding of the analyses of the flooding hazards presented in the Millstone FHRR. The audit is intended to support completion of the staff's review of the FHRR and the subsequent issuance of a Staff Assessment.

The enclosed audit plan outlines the process that will allow the NRC staff to identify additional information potentially necessary for licensees to supplement their FHRRs, and resolve potential technical concerns. The details of this audit have been discussed with Ms. Wanda Craft of your staff.

D. Heacock If you have any questions, please contact me at (301) 415-2915 or by e-mail at victor. hall@nrc.gov.

Sincerely, Victor Hall, Senior Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation Docket Nos. 50-245 and 50-336

Enclosure:

Audit Plan cc w/encl: Distribution via Listserv

NRC PLAN FOR THE AUDIT OF DOMINION NUCLEAR CONNECTICUT. INC.'S FLOOD HAZARD REEVALUATION REPORT SUBMITTAL RELATING TO THE NEAR-TERM TASK FORCE RECOMMENDATION 2.1-FLOODING FOR MILLSTONE POWER STATION, UNITS 1 AND2 BACKGROUND AND AUDIT BASIS By letter dated March 12, 2012, the U.S. Nuclear Regulatory Commission (NRC) issued a request for information to all power reactor licensees and holders of construction permits in active or deferred status, pursuant to Title 10 of the Code of Federal Regulations (10 CFR),

Section 50.54(f) "Conditions of license" (hereafter referred to as the "50.54(f) letter"). The request was issued in connection with implementing lessons-learned from the 2011 accident at the Fukushima Dai-ichi nuclear power plant, as documented in The Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident. Recommendation 2.1 of that document recommended that the staff issue orders to all licensees to reevaluate seismic and flooding for their sites against current NRC requirements and guidance. Subsequent Staff Requirements Memoranda associated with Commission Papers SECY 11-0124 and SECY-11-0137, instructed the NRC staff to issue requests for information to licensees pursuant to 10 CFR 50.54(f).

By letter dated March 12, 2015, Dominion Nuclear Connecticut, Inc. (Dominion, the licensee) submitted its Flood Hazard Reevaluation Report (FHRR) for Millstone Power Station, Units 1 and 2 (Millstone) (Agencywide Documents Access and Management System Accession No. ML15078A203). The NRC staff has begun its review of the aforementioned submittals and plans to conduct a regulatory audit of Dominion to aid in its review of the licensee's FHRR.

REGULATORY AUDIT SCOPE AND METHODOLGY The areas of focus for the regulatory audit is the information contained in the Millstone FHRR submittal, and all associated and relevant supporting documentation used in the development of the aforementioned document including, but not limited to, methodology, process information, calculations, computer models, etc. The audit will be conducted and completed over several meetings that are to be determined, as necessary.

Enclosure

INFORMATION AND OTHER MATERIAL NECESSARY FOR THE REGULATORY AUDIT The information required for the audit is the licensee's models and supporting calculations, as well as documentation related to the storm surge and site specific probable maximum precipitation analyses. Other information needs will be discussed as audit meetings are scheduled.

NRC AUDIT TEAM Title Team Member Affiliation Team Leader, NRR/JLD Victor Hall NRC Branch Chief, NRO/DSEA Chris Cook NRC Technical Lead Peter Chaput NRC Technical Manager Mike Willingham NRC Technical Support Various Contractors Department of Energy National Laboratory LOGISTICS The audit meetings will be coordinated with Dominion staff.

DELIVERABLES The NRC team will develop an audit summary report to convey the audit results. The report will be placed in ADAMS within 90 days of the completion of the final audit session, and will be publicly available.

The information discussed in the audit may be included, fully or in part, in the development of the NRC technical staff's assessments as a result of the FHRR review.

D. Heacock If you have any questions, please contact me at (301) 415-2915 or by e-mail at victor.hall@nrc.gov.

Sincerely,

/RAJ Victor Hall, Senior Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation Docket Nos. 50-245 and 50-336

Enclosure:

Audit Plan cc w/encl: Distribution via Listserv DISTRIBUTION:

PUBLIC JLD R/F RidsNRRJLD Resource PChaput, NRO MShams, NRR MWillingham, NRO TGovan, NRR CCook, NRO ARivera, NRO KErwin, NRO MFranovich, NRR JBowen, NRR BHarvey,NRO RidsNrrPMMillstone RidsNrrDorllpl1-2Resource ADAMS Accession No.: ML15153A077 OFFICE NRR/JLD/JHMB/PM NRR/JLD/JHMB/LA NRR/JLD/JHMB/BC NRR/JLD/JHMB/PM NAME VHall Slent MShams VHall DATE 06/10/15 06/02/15 06/13/15 06/15/15 OFFICAL RECORD COPY