ML15233A120

Staff Review of Interim Evaluation Associated with Reevaluated Seismic Hazard Implementing Near-Term Task Force Recommendation 2.1

ML15233A120
Person / Time
Site:	Beaver Valley, Trojan  File:Portland General Electric icon.png
Issue date:	08/25/2015
From:	Nicholas Difrancesco Japan Lessons-Learned Division
To:	Emily Larson FirstEnergy Nuclear Operating Co
Wyman S, NRR/JLD, 415-3041
References
TAC MF5223, TAC MF5224
Download: ML15233A120 (3)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 August 25, 2015 Mr. Eric A. Larson Site Vice President Beaver Valley Power Station P. 0. Box 4, Route 168 Shippingport, PA 15077

SUBJECT:

BEAVER VALLEY POWER STATION, UNITS 1AND2- STAFF REVIEW OF INTERIM EVALUATION ASSOCIATED WITH REEVALUATED SEISMIC HAZARD IMPLEMENTING NEAR-TERM TASK FORCE RECOMMENDATION 2.1 (TAC NOS. MF5223 AND MF5224)

Dear Mr. Larson:

By letter dated March 12, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12053A340), the U.S. Nuclear Regulatory Commission (NRC) issued a request for information pursuant to Title 10 of the Code of Federal Regulations Part 50, Section 50.54(f) (hereafter referred to as the 50.54(f) letter). The request was issued as part of implementing lessons-learned from the accident at the Fukushima Dai-ichi nuclear power plant.

Enclosure 1 to the 50.54(f) letter requested that licensees reevaluate seismic hazards at their sites using present-day methodologies and guidance. Enclosure 1, Item 6, of the 50.54(f) letter requested that licensees identify "interim evaluation and actions taken or planned to address the higher seismic hazard relative to the design basis as appropriate, prior to completion of the

[seismic] risk evaluation." In addition to the interim evaluation provided in the March 2014 Seismic Screening and Hazard report, the licensees for the Central and Eastern United States committed to providing the Expedited Seismic Evaluation Process (ESEP) report, an interim evaluation, by December 31, 2014.

By letters dated December 19, 20141, FirstEnergy Nuclear Operating Company (FENOC, the licensee), provided its ESEP report in a response to Enclosure 1, Item (6) of the 50.54(f) letter, for Beaver Valley Power Station, Units 1 and 2 (Beaver Valley). The NRC staff assessed the licensee's implementation of the ESEP guidance through the completion of a reviewer checklist2. In support of NRC staff questions, FENOC provided a response dated June 29, 2015 3 , clarifying submittal information. Based on the NRC staff review of the ESEP report and responses to the staff's questions, the NRC staff concludes that the licensee's implementation of the interim evaluation meets the intent of the guidance.

The NRC staff concludes that, through the implementation of the ESEP guidance, the licensee 1 The December 19, 2014, letter can be found under ADAMS Accession No. ML14353A059.

2 The Beaver Valley ESEP NRC review checklist can be found under ADAMS Accession No. ML15231A395.

3 The FENOC response to NRC staff questions can be found ADAMS Accession No. ML15181A085.

E. Larson identified and evaluated the seismic capacity of certain key installed mitigating strategies equipment that is used for core cooling and containment functions to cope with scenarios that involve a loss of all alternating current power and loss of access to the ultimate heat sink to withstand a seismic event that exceeds the re-evaluated seismic hazard for Beaver Valley. The licensee's ESEP assessment provides additional assurance which supports continued plant safety while the longer-term seismic evaluation is completed to support regulatory decision making. The NRC staff concludes that the licensee responded appropriately to Enclosure 1, Item (6) of the 50.54(f) letter. Application of this review is limited to the interim evaluation as part of the Recommendation 2.1 Seismic review.

If you have any questions, please contact me at (301) 415-1115 or via e-mail at Nicholas.DiFrancesco@nrc.gov.

Sincerely, Nicholas J. DiFrancesco, Senior Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation Docket Nos. 50-344 and 50-412 cc: Distribution via Listserv

E. Larson identified and evaluated the seismic capacity of certain key installed mitigating strategies equipment that is used for core cooling and containment functions to cope with scenarios that involve a loss of all alternating current power and loss of access to the ultimate heat sink to withstand a seismic event that exceeds the re-evaluated seismic hazard for Beaver Valley. The licensee's ESEP assessment provides additional assurance which supports continued plant safety while the longer-term seismic evaluation is completed to support regulatory decision making. The NRC staff concludes that the licensee responded appropriately to Enclosure 1, Item (6) of the 50.54(f) letter. Application of this review is limited to the interim evaluation as part of the Recommendation 2.1 Seismic review.

If you have any questions, please contact me at (301) 415-1115 or via e-mail at Nicholas.DiFrancesco@nrc.gov.

Sincerely, IRA!

Nicholas J. DiFrancesco, Senior Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation Docket Nos. 50-344 and 50-412 cc: Distribution via Listserv DISTRIBUTION:

PUBLIC LPL1-1 R/F JLD R/F RidsOeMailCenter RidsNrrPMBeaverValley RidsNrrDorllpl1-2 RidsNrrLASLent RidsRgn1 MailCenter RidsNrrOd DJackson, NRO MShams, NRR NDiFrancesco, NRR ADAMS Accession Number: ML15233A120

• via concurrence e-mail OFFICE NRR/JLD/JHMB/PM NRR/JLD/LA NRO/DSEA/RGS2/BC*

NAME SWyman Slent DJackson DATE 08/20/15 08/21/15 08/18/15 OFFICE NRR/JLD/JHMB/BC NRR/JLD/JHMB/PM NAME MS hams NDiFrancesco DATE 08/25/15 08/25/15 OFFICIAL RECORD COPY