ML073521293

Pilgrim - Clarification to Previous Response to NRC Generic Letter 2007-01

ML073521293
Person / Time
Site:	Pilgrim
Issue date:	12/09/2007
From:	Bronson K H Entergy Nuclear Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
2.07.091, GL-07-001
Download: ML073521293 (3)

Text

Entergy Nuclear Operations, Inc."Pilgrim Nuclear Power Station 600 Rocky Hill Road Plymouth, MA 02360 Kevin H. Bronson Site Vice President December 9, 2007 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Subject:

Pilgrim Nuclear Power Station Docket No. 50-293 License No. DPR-35 Clarification to Previous Response to NRC Generic Letter 2007-01

References:

1. Entergy Letter No. 2.07.034, Response to NRC Generic Letter 2007-01, dated May 3, 2007 2. NRC Generic Letter 2007-01, "Inaccessible or Underground Power Cable Failures that Disable Accident Mitigation Systems or Cause Plant Transients", dated February 7, 2007 3. NEI Letter from J. H. Riley to Administrative Points of Contact, "Guidance for Response to GL 2007-01", dated March 16, 2007 4. NRC Letter to James H. Riley, "Respbnse to Nuclear Entergy Institute (NEI)'Letter dated March 26, 2007 -RE: Interpretation of Generic Letter (GL)2007-01, Inaccessible or Underground Power Cable Failures that Disable Accident Mitigation Systems or Cause Plant Transients", dated April 13, 2007 LETTER NUMBER: 2.07.091

Dear Sir or Madam:

Entergy has reviewed the previously submitted GL 2007-01 Response (Reference

1) taking into consideration Reference 4 guidance and hereby confirms that the previous response remains valid for the guidance provided in Reference

4. Attachment 1 provides our previous response.There are no regulatory commitments made in this submittal.

If you have any questions or require additionhallinformation, please contact Mr. :Joseph-R.

Lynch, Licensing Manager, at (508) 830-8403.... .. ..'", , , :: i"!' a " "7" : .i " '. ' .': i '!" 7" ." :" i ':. "L " u': ¢ " -: "

Entergy Nuclear Operations, Inc. Letter Number: 2.07.091 Pilgrim Nuclear Power Station Page 2 The requested information is being provided pursuant the requirements of 10 CFR 50.54(f).I declare under penalty of perjury that the foregoing is true and correct.Executed on the ____of December, 2007.Kevin H. Bronson Site Vice President WGL/dI Attachment 1: Generic Letter 2007-01 Response cc: Mr. James S. Kim, Project Manager Plant Licensing Branch I-1 Division of Operator Reactor Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission One White Flint North 4D9A 11555 Rockville Pike Rockville, MD 20852 Regional Administrator, Region 1 U.S. Nuclear Regulator Commission 475 Allendale Road King of Prussia, PA 19406 Senior Resident Inspector Pilgrim Nuclear Power Station Attachment 1 to Entergy Letter No. 2.07.091 Generic Letter 2007-01 Response Request 1 Provide 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.Indicate the type, manufacturer, date of failure, type of service, voltage class, years of service, and the root causes for the failure.Response 1 Pilgrim has experienced one cable failure within the scope of the GL. The requested information is provided below.Cable Type Voltage Manufacturer Date of Failure Type of Root Class I Service (Yrs.) Service Cause 1-1/C-1250 5KV KERITE Feb.21,1989/

Cable Failed MCM, 19 years A404CD, during stranded 4160 volt feed service.coated copper (Ref: LER 89-. from offsite Failure conductor, 10, dated power source appeared non shielded.

March 20, to Bus A4 to be due KERITE HT 1989) installed in to insulation duct bank and installation (EPR) with normally damage.KERITE FR energized but jacket not loaded.(Hypalon)

_Request 2 Describe 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).Response 2 Pilgrim inspection, testing, and monitoring practices presehtly include visual cable inspection during routine operations, periodic meggering of cables, connected equipment associated with maintenance activities, and periodic inspection of manholes for dewatering.

The plant condition reporting system is used to determine root cause and extent of conditions where deemed necessary and determining the need for any increased cable monitoring.