ML113110769

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

ML113110769
Person / Time
Site:	Arkansas Nuclear
Issue date:	11/18/2011
From:	Kalyanam N Plant Licensing Branch IV
To:	Entergy Operations
Kalyanam N, NRR/DORL/LPL4, 415-1480
References
TAC ME6398, TAC ME6399, BL-11-001
Download: ML113110769 (5)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555*0001 November 18, 2011 Vice President, Operations Entergy Operations, Inc.

Arkansas Nuclear One 1448 S. R. 333 Russellville, AR 72802

SUBJECT:

ARKANSAS NUCLEAR ONE, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING 60-DAY RESPONSE TO NRC BULLETIN 2011-01, "MITIGATING STRATEGIES" (TAC NOS. ME6398 AND ME6399)

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. ML 1112S0360), 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 large explosions or fires were in compliance with the requirements in Title 10 of the Code of Federal Regulations (10 CFR) Section SO.S4{hh){2).

The bulletin requested information on licensees' 10 CFR SO.S4{hh)(2) mitigating strategies in light of the recent events at Japan's Fukushima Daiichi facility to determine if (1) additional efforts are needed to ensure compliance with current requirements, (2) whether enhancement to the existing regulations and guidance are necessary, and/or (3) to determine if further regulatory action is warranted.

The bulletin required two sets of responses pursuant to the provisions of 10 CFR SO.S4{f). The first responses were due 30 days after issuance of the bulletin. By letter dated June 10. 2011 (ADAMS Accession No. ML111610449), Entergy Operations, Inc. (Entergy, the licensee),

provided a response to the first set of questions for Arkansas Nuclear One, Units 1 and 2. The second responses were due 60 days after issuance of the bulletin. By letter dated July 8, 2011 (ADAMS Accession No. ML11193A138), Entergy responded to this second set of questions.

The NRC staff has reviewed the information provided in your letters dated June 10 and July 8, 2011, and determined that additional information is needed for the NRC staff to complete its review of your 60-day response to the bulletin. This request for additional information was discussed with Mr. R. Clark of your staff on November 11, 2011, and it was agreed that Entergy will provide the requested additional information within 30 days of the date of this letter.

-2 If you have any questions regarding this letter, please to contact me at 301-415-1480 or via e-mail at kaly.kalyanam@nrc.gov.

Sincerely, N. Kalyanam, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-313 and 50-368

Enclosure:

As stated cc w/encl: Distribution via Listserv

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

ARKANSAS NUCLEAR ONE. UNITS 1 AND 2 DOCKET NOS. SO-313 AND SO-368 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. ML 1112S0360. 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 large explosions or fires were in compliance with the requirements in Title 10 of the Code of Federal Regulations (10 CFR) Section SO.S4(hh)(2).

The bulletin required two sets of responses pursuant to the provisions of 10 CFR SO.S4(f). The first responses were due 30 days after issuance of the bulletin. By letter dated June 10, 2011 (ADAMS Accession No. ML111610449), Entergy Operations, Inc. (Entergy, the licensee),

provided a response to the first set of questions for Arkansas Nuclear One, Units 1 and 2. The second responses were due 60 days after issuance of the bulletin. By letter dated July 8, 2011 (ADAMS Accession No. ML11193A138), Entergy responded to this second set of questions.

The NRC staff has reviewed the information provided in your letters dated June 10 and July 8, 2011, and determined that additional information is needed for the NRC staff to complete its review of your 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 how you ensure that a vehicle is available to move the B.S. b portable pump and other B.S.b equipment to the appropriate place when needed.

The bulletin requested that each licensee describe in detail the controls for ensuring equipment needed to execute the mitigating strategies will be available when needed. A vehicle is typically needed to implement the strategies since the portable pump and other equipment is stored away from target areas.

Enclosure

-2

3. Please identify the minimum inventory frequency for equipment needed for the mitigating strategies not specifically identified in response to the bulletin. Alternatively, please describe the inventory frequency for firefighter turnout gear, tools, and instruments 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. The equipment listed above is generally needed to implement the mitigating strategies, but not all of these items were clearly included in the licensee's response dated July 8, 2011, to the bulletin.

4. 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 assured so that the strategies remain feasible. The safety evaluation documenting the NRC review of the licensee's response to Section B.S.b of the Interim Compensatory Measures 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 licensee's response to the bulletin appears to imply that fire brigade training is limited to pump operations.

- 2 If you have any questions regarding this letter, please to contact me at 301-415-1480 or via e-mail at kaly.kalyanam@nrc.gov.

Sincerely, I RAJ N. Kalyanam, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-313 and 50-368

Enclosure:

As stated cc w/encl: Distribution via Listserv DISTRIBUTION:

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