BSEP 07-0130, Response to Request for Additional Information Regarding Generic Letter 2007-01, Inaccessible or Underground Power Cable Failures That Disable Accident Mitigation Systems or Cause Plant Transients.

Response to Request for Additional Information Regarding Generic Letter 2007-01, Inaccessible or Underground Power Cable Failures That Disable Accident Mitigation Systems or Cause Plant Transients.

ML073320598
Person / Time
Site:	Brunswick
Issue date:	11/20/2007
From:	Scarola J Progress Energy Carolinas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
BSEP 07-0130, GL-07-001, TAC MD4303, TAC MD4304
Download: ML073320598 (4)

Text

& Progress Energy James Scarola Vice President Brunswick Nuclear Plant Progress Energy Carolinas, Inc.

November 20, 2007 SERIAL: BSEP 07-0130 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001

Subject:

Brunswick Steam Electric Plant, Unit Nos. 1 and 2 Docket Nos. 50-325 and 50-324/License Nos. DPR-71 and DPR-62 Response to Request for Additional Information Regarding Generic Letter 2007-01, "Inaccessible or Underground Power Cable Failures That Disable Accident Mitigation Systems or Cause Plant Transients,"

(NRC TAC Nos. MD4303 and MD4304)

Reference:

Letter from James Scarola (CP&L) to USNRC, "Response to Generic Letter 2007-01, Inaccessible or Underground Power Cable Failures That DisableAccident Mitigation Systems or Cause Plant Transients," dated May 8, 2007, ADAMS Accession Number ML071360062 Ladies and Gentlemen:

On February 7, 2007, the NRC issued Generic Letter 2007-01, "Inaccessible or Underground Power Cable Failures That Disable Accident Mitigation Systems or Cause Plant Transients." Carolina Power & Light Company (CP&L), now doing business as Progress Energy Carolinas, Inc., provided the Brunswick Steam Electric Plant (BSEP),

Unit Nos. 1 and 2, response to Generic Letter 2007-01 on May 8, 2007. On November 7, 2007, the NRC provided a request for additional information, via electronic mail, regarding CP&L's responses to Generic Letter 2007-01.

The requested information for BSEP is enclosed. No regulatory commitments are contained in this letter. Please refer any questions regarding this submittal to Mr. Randy C.

Ivey, Manager - Support Services, at (910) 457-2447.

P.O.

Box 10429 Southport, NC 28461 T> 910.457.3698 F> 910.457.2803

Document Control Desk BSEP 07-0130 / Page 2 I declare, under penalty of perjury, that the foregoing is true and correct. Executed on November 20, 2007.

Sincerely, James Scarola WRM/wrm

Enclosure:

Response to Request for Additional Information Regarding Generic Letter 2007-01

Document Control Desk BSEP 07-0130 / Page 3 cc (with enclosure):

U. S. Nuclear Regulatory Commission, Region II ATTN: Dr. William D. Travers, Regional Administrator Sam Nunn Atlanta Federal Center 61 Forsyth Street, SW, Suite 23T85 Atlanta, GA 30303-8931 U. S. Nuclear Regulatory Commission ATTN: Mr. Joseph D. Austin, NRC Senior Resident Inspector 8470 River Road Southport, NC 28461-8869 U. S. Nuclear Regulatory Commission (Electronic Copy Only)

ATTN: Mr. Stewart N. Bailey (Mail Stop OWFN 8B1) 11555 Rockville Pike Rockville, MD 20852-2738 Chair - North Carolina Utilities Commission P.O. Box 29510 Raleigh, NC 27626-0510

.. ,.., ..- ~

BSEP 07-0130 Enclosure Page 1 of 1 Response to Request for Additional Information Regarding Generic Letter 2007-01

Background

On February 7, 2007, the NRC issued Generic Letter 2007-01, "Inaccessible or Underground Power Cable Failures That Disable Accident Mitigation Systems or Cause Plant Transients."

Carolina Power & Light Company (CP&L), now doing business as Progress Energy Carolinas, Inc., provided the Brunswick Steam Electric Plant (BSEP), Unit Nos. 1 and 2, response to Generic Letter 2007-01 on May 8, 2007. On November 7, 2007, the NRC provided a request for additional information, via electronic mail, regarding CP&L's responses to Generic Letter 2007-01.

NRC Question The Nuclear Regulatory Commission (NRC) staff has received your May 8, 2007, response to Generic Letter (GL) 2007-01, "Inaccessible or Underground Power Cable Failures that Disable Accident Mitigation Systems or Cause Plant Transients." The response to Question 1 of GL 2007-01 provided the cable failure history for Brunswick, stating that there were two failures of medium-voltage cables within the scope of Title 10 of the Code of FederalRegulations, Section 50.65, "Requirements for Monitoring the Effectiveness of Maintenance at Nuclear Power Plants" (Maintenance Rule), both on service to the motor~driven fire pump. Please provide the type of cable insulation and the nominal service voltage for these two failures.

CP&L Response The nominal service voltage of the cables associated with the two failures is rated at 4160 volts.

Additional information regarding these cables, including the cable insulation information, is provided below.

Type: 3-1/c 4/0 shielded, 5kV Manufacture: Okonite Insulation: EPR (black)

Shield: Copper tape; tinned (lapped over semi-conductor tape)

Jacket: NEO