ML082910233

Closeout of Generic Letter 2007-01 Inaccessible or Underground Power Cable Failures That Disable Accident Mitigation Systems or Cause Plant Transients.

ML082910233
Person / Time
Site:	Calvert Cliffs, Nine Mile Point, Ginna
Issue date:	10/23/2008
From:	Mark Kowal Plant Licensing Branch 1
To:	Barron H Constellation Energy Nuclear Group
Guzman R
References
TAC MD4308, TAC MD4309, TAC MD4331, TAC MD4349, TAC MD4350
Download: ML082910233 (3)

Text

October 23, 2008 Mr. Henry B. Barron Chief Nuclear Officer Constellation Energy Nuclear Generation Group, LLC 100 Constellation Way, Suite 1800P Baltimore, MD 21202

SUBJECT:

CALVERT CLIFFS NUCLEAR POWER PLANT, UNIT NOS. 1 AND 2; NINE MILE POINT NUCLEAR STATION, UNIT NOS. 1 AND 2; R.E. GINNA NUCLEAR POWER PLANT - CLOSEOUT OF GENERIC LETTER 2007-01 AINACCESSIBLE OR UNDERGROUND POWER CABLE FAILURES THAT DISABLE ACCIDENT MITIGATION SYSTEMS OR CAUSE PLANT TRANSIENTS@ (TAC NOS. MD4308, MD4309, MD4349, MD4350, AND MD4331)

Dear Mr. Barron:

On February 7, 2007, the U.S. Nuclear Regulatory Commission (NRC) issued Generic Letter (GL) 2007-01 AInaccessible or Underground Power Cable Failures That Disable Accident Mitigation Systems or Cause Plant Transients@ (Agencywide Documents Access and Management System (ADAMS) Accession No. ML070360665). GL 2007-01 requested that licensees provide the following information within 90 days of the date of the GL:

(1) A history of inaccessible or underground power cable failures for all cables that are within the scope of 10 CFR 50.65 (the Maintenance Rule) and for all voltage levels including the cable type, cable manufacturer, date of failure, type of service, voltage class, years of service, and the root causes for the failure; and, (2) A description of all inspection, testing, and monitoring programs to detect the degradation of inaccessible or underground power cables that support emergency diesel generators (EDGs), offsite power, emergency service water (ESW), service water, component cooling water and other systems that are within the scope of 10 CFR 50.65 (the Maintenance Rule).

In your letters dated May 7, 2007 and December 12, 2007 (ADAMS Accession Nos.

ML071340045 and ML073480031, respectively), you provided the information requested in GL 2007-01 and the subsequent request for additional information including: (1) a history of inaccessible or underground power cable failures for all cables that are within the scope of 10 CFR 50.65 (the Maintenance Rule) and for all voltage levels including the cable type, cable manufacturer, date of failure, type of service, voltage class, years of service, and the root causes for the failure; and, (2) a description of all inspection, testing, and monitoring programs to detect the degradation of inaccessible or underground power cables that support EDGs, offsite power, ESW, service water, component cooling water and other systems that are within the scope of 10 CFR 50.65 (the Maintenance Rule).

H. Barron The NRC staff has reviewed the submitted information and has concluded that for Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2, Nine Mile Point Nuclear Station, Unit Nos. 1 and 2, and R.E. Ginna Nuclear Power Plant, the responses to GL 2007-01 are adequate. Based on this review, your responses to GL 2007-01 are considered closed and no further action is requested of you at this time.

If you have any questions regarding this letter, please feel free to contact Douglas Pickett at (301) 415-1364.

Sincerely,

/RA/

Mark G. Kowal, Chief Plant Licensing Branch I-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-244, 50-220, 50-410, 50-317, and 50-318 cc: Distribution via ListServ

H. Barron The NRC staff has reviewed the submitted information and has concluded that for Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2, Nine Mile Point Nuclear Station, Unit Nos. 1 and 2, and R.E. Ginna Nuclear Power Plant, the responses to GL 2007-01 are adequate. Based on this review, your responses to GL 2007-01 are considered closed and no further action is requested of you at this time.

If you have any questions regarding this letter, please feel free to contact Douglas Pickett at (301) 415-1364.

Sincerely,

/RA/

Mark G. Kowal, Chief Plant Licensing Branch I-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-244, 50-220, 50-410, 50-317, and 50-318 cc: Distribution via ListServ DISTRIBUTION:

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RidsNrrPMDPickett S. Little RidsNrrPMRGuzman GDentel, RI RidsNrrDorlDPR ADAMS Accession Number: ML082910233 NRR-106 OFFICE LPL I-1:GE LPL I-1:PM LPL I-1:PM LPL I-1:LA EEEB:BC LPL I-1:BC NAME JGall DPickett RGuzman SLittle GWilson MKowal DATE 10/16/08 10 /23/ 08 10 / 23 / 08 10 / 22 / 08 10 / 23 / 08 10 /23/ 08 OFFICIAL RECORD COPY