ML113210376

Request for Additional Information, 60-Day Response to NRC Bulletin 2011-01, Mitigating Strategies

ML113210376
Person / Time
Site:	Grand Gulf
Issue date:	11/28/2011
From:	Wang A Plant Licensing Branch IV
To:	Entergy Operations
Wang, A B, NRR/DORL/LPLIV, 415-1445
References
TAC ME6436, BL-11-001
Download: ML113210376 (5)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 28, 2011 Vice President, Operations Entergy Operations, Inc.

Grand Gulf Nuclear Station P.O. Box 756 Port Gibson, MS 39150

SUBJECT:

GRAND GULF NUCLEAR STATION, UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION REGARDING 60-DAY RESPONSE TO BULLETIN 2011-01, "MITIGATING STRATEGIES" (TAC NO. ME6436)

Dear Sir or Madam:

On May 11, 2011, the U.S. Nuclear Regulatory Commission (NRC) issued Bulletin 2011-01, "Mitigating Strategies" (Agencywide Documents Access and Management System (ADAMS)

Accession No. ML111250360), to all holders of operating licenses for nuclear power reactors, except those that have permanently ceased operation and have certified that fuel has been removed from the reactor vessel. The purpose of the bulletin was to obtain a comprehensive verification that licensees' mitigating strategies to maintain or restore core cooling, spent fuel cooling, and containment following a large explosion or fire were compliant with Title 10 of the Code of Federal Regulations (10 CFR) Section 50.54(hh)(2). The bulletin requested information on licensee 10 CFR 50.54(hh)(2) mitigating strategies in light of the recent events at Japan's Fukushima Daiichi facility to determine if (1) additional assessment of program implementation is needed, (2) the current inspection program should be enhanced, or (3) further regulatory action is warranted.

The bulletin required two sets of responses pursuant to the provisions of 10 CFR 50.54(f). The first responses were due 30 days after issuance of the bulletin. By letter dated June 8, 2011 (ADAMS Accession No. ML111590788), Entergy Operations, Inc. (the licensee), provided a response to the first set of questions for Grand Gulf Nuclear Station, Unit 1. The second responses were due 60 days after issuance of the bulletin. By letter dated July 11, 2011 (ADAMS Accession No. ML11313A007), the licensee responded to this second set of questions. Portions of the letter dated July 11, 2011, contain sensitive unclassified non safeguards information and, accordingly, have been withheld from public disclosure.

The NRC staff has reviewed the information provided in your letters dated June 8 and July 11, 2011, and determined that additional information is needed for the NRC staff to complete its review of the 60-day response to the bulletin. Please respond to the enclosed request for additional information within 30 days of the date of this letter.

-2 If you have any questions regarding this letter, please contact me at (301) 415-1445 or via e-mail at Alan.Wang@nrc.gov.

Sincerely, c\~ WCuv1AK' Alan Wang. Project MS'nager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-416

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv

NRC BULLETIN 2011-01, "MITIGATING STRATEGIES" REQUEST FOR ADDITIONAL INFORMATION ENTERGY OPERATIONS, INC.

GRAND GULF NUCLEAR STATION, UNIT 1 DOCKET NO. 50-416 On May 11,2011, the U.S. Nuclear Regulatory Commission (NRC) issued Bulletin 2011-01, "Mitigating Strategies" (Agencywide Documents Access and Management System (ADAMS)

Accession No. ML111250360), to all holders of operating licenses for nuclear power reactors, except those that have permanently ceased operation and have certified that fuel has been removed from the reactor vessel. The purpose of the bulletin was to obtain a comprehensive verification that licensees' mitigating strategies to maintain or restore core cooling, spent fuel cooling, and containment following a large explosion or fire were compliant with Title 10 of the Code of Federal Regulations (10 CFR) Section 50.54(hh)(2).

The bulletin required two sets of responses pursuant to the provisions of 10 CFR 50.54(f). The first responses were due 30 days after issuance of the bulletin. By letter dated June 8, 2011 (ADAMS Accession No. ML111590788), Entergy Operations, Inc. (Entergy, the licensee),

provided a response to the first set of questions for Grand Gulf Nuclear Station, Unit 1. The second responses were due 60 days after issuance of the bulletin. By letter dated July 11, 2011 (ADAMS Accession No. ML11313A007), the licensee responded to this second set of questions. Portions of the letter dated July 11, 2011, contain sensitive unclassified non safeguards information and, accordingly, have been withheld from public disclosure.

The NRC staff has reviewed the information provided in Entergy's letters dated June 8 and July 11, 2011, and determined that additional information is needed for the NRC staff to complete its review of the 60-day response to the bulletin.

1. Please describe in detail the maintenance or testing of monitor nozzles, spray nozzles, or similar devices to ensure that they will be functional when needed.

The bulletin requested that each licensee describe in detail the maintenance and testing on equipment procured to support the mitigating strategies to ensure that it will be functional when needed. In the context of the mitigating strategies, these devices are commonly used for firefighting, spent fuel pool spray strategies, and as a means to reduce the magnitude of fission product releases.

2. Please describe in detail the testing of communications equipment to ensure that it is functional when needed.

The bulletin requested that each licensee describe in detail the testing of equipment supporting the mitigating strategies to ensure that it will be functional when needed.

Communications equipment needed to support the mitigating strategies was described Enclosure

-2 in the safety evaluation documenting the NRC review of the licensee's response to Section B.5.b of the Interim Compensatory Measures (ICM) Order (EA-02-026), and typically includes radios, satellite phones, spare batteries, and chargers.

3. Please describe in detail how the licensee ensures there is sufficient fuel for the pumping source when needed.

The bulletin requested that each licensee describe in detail the maintenance of equipment supporting the mitigating strategies to ensure that it will be functional when needed.

4. Please identify the minimum inventory frequency for equipment needed for the rnitigating strategies not specifically identified in response to the bulletin. Alternatively, please describe the inventory frequency for firefighter turnout gear needed to support the mitigating strategies.

The bulletin requested that each licensee describe in detail the controls for ensuring equipment supporting the mitigating strategies will be available when needed.

Firefighter turnout gear, tools, and instruments are generally needed to implement the mitigating strategies. The NRC staff found that tools and instruments are specifically listed in the response, but firefighter turnout gear was not listed.

5. Please describe in detail the fire brigade training as it relates to all phases of the mitigating strategies.

The bulletin requested that each licensee describe in detail how configuration and guidance management, including training, is ensured so that the strategies remain feasible. The safety evaluation documenting the NRC review of the licensee's response to Section B.5.b of the ICM Order (EA-02-026) states that the expectation for fire brigade training (Phase 1, B.1.1) includes accelerant-fed fires and coordinated fire response. The safety evaluation states that the Grand Gulf 'fire brigade annual training includes accelerant-fed fires. The licensee's response to the bulletin implies that fire brigade training is limited to triennial review of B.5.b procedures.

-2 If you have any questions regarding this letter, please contact me at (301) 415-1445 or via e-mail at Alan.Wang@nrc.gov.

Sincerely, IRA!

Alan Wang, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-416

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv DISTRIBUTION:

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