W3F1-2007-0065, Response to NRC RAI on GL 2007-01, Inaccessible or Underground Power Cable Failures That Disable Accident Mitigation Systems or Cause Plant Transients

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Response to NRC RAI on GL 2007-01, Inaccessible or Underground Power Cable Failures That Disable Accident Mitigation Systems or Cause Plant Transients
ML073532228
Person / Time
Site: Waterford Entergy icon.png
Issue date: 12/18/2007
From: Walsh K
Entergy Nuclear South, Entergy Operations
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
GL-07-001, W3F1-2007-0065
Download: ML073532228 (4)
v • d • e


Text

Entergy Nuclear South Entergy Operations, Inc.

17265 River Road Killona, LA 70057 En teW Tel 504 739 6660 Fax 504 739 6678 kwalshl @entergy.com Kevin T. Walsh Vice President, Operations Waterford 3 W3F1 -2007-0065 December 18, 2007 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001

Subject:

Response to NRC RAI on GL 2007-01, "Inaccessible or Underground Power Cable Failures that Disable Accident Mitigation Systems or Cause Plant Transients."

Docket No. 50-382 License No. NPF-38

Dear Sir or Madam:

This letter is submitted in response to NRC letter dated November 20, 2007, which requests additional information associated with Generic Letter 2007-01, "Inaccessible or underground power cable failures that disable accident mitigation systems or cause plant transients." See the attached response.

There are no new commitments contained in this submittal.

If you have questions, please contact Oscar Pipkins at (504) 739-6707.

I declare under penalty of perjury that the foregoing is true and correct. Executed on December 18, 2007.

Sincerely, KTW/ZPP/ssf

Attachment:

1. Response to NRC RAI on Generic Letter 2007-01

,41 a -7 LCIN

W3F1 -2007-0065 Page 2 cc: Mr. Elmo E. Collins, Jr.

Regional Administrator U. S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 NRC Senior Resident Inspector Waterford Steam Electric Station Unit 3 P.O. Box 822 Killona, LA 70066-0751 U. S. Nuclear Regulatory Commission Attn: Mr. N. Kalyanam Mail Stop O-07D1 Washington, DC 20555-0001 Wise, Carter, Child & Caraway ATTN: J. Smith P.O. Box 651 Jackson, MS 39205 Winston & Strawn ATTN: N.S. Reynolds 1700 K.Street, NW Washington, DC 20006-3817 Morgan, Lewis & Bockius LLP ATTN: T.C. Poindexter 1111 Pennsylvania Avenue, NW Washington, DC 20004

1 to Attachment W3F1 -2007-0065 Generic Letter 2007-01 Response to NRC RAI on to W3F1 -2007-0065 Page 1 of 1 In NRC letter dated November 20, 2007, the following three requests were made for additional information. The associated response is provided along with each request for information.

1. Provide the type of cable insulation for the cable failures included in Waterford 3 response to GL 2007-01.

Response

One cable failure was identified in the original response submitted via Entergy Letter W3F1 -2007-0017 dated May 3, 2007. The insulation type for that cable is Ethylene Propylene Rubber. The cable is a 250 MCM aluminum conductor cable, rated at 5 kv.

2. Discuss any exceptions and/or deviations, if any, from the NEI guidance, as supplemented by the NRC additional guidance.

Response

Waterford 3 performed the research on underground cable failures in accordance with NEI guidance. The methodology of the search did not deviate from the additional guidance supplemented by the NRC.

3. If Waterford 3's response to GL 2007-01 excluded cable failures based on the NEI guidance (i.e., not following NRC guidance in the NRC letter dated April 13, 2007),

provide the data for these failures as requested in GL 2007-01.

Response

Response to this question is not applicable (see response to question 2 above).

Text

Entergy Nuclear South Entergy Operations, Inc.

17265 River Road Killona, LA 70057 En teW Tel 504 739 6660 Fax 504 739 6678 kwalshl @entergy.com Kevin T. Walsh Vice President, Operations Waterford 3 W3F1 -2007-0065 December 18, 2007 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001

Subject:

Response to NRC RAI on GL 2007-01, "Inaccessible or Underground Power Cable Failures that Disable Accident Mitigation Systems or Cause Plant Transients."

Docket No. 50-382 License No. NPF-38

Dear Sir or Madam:

This letter is submitted in response to NRC letter dated November 20, 2007, which requests additional information associated with Generic Letter 2007-01, "Inaccessible or underground power cable failures that disable accident mitigation systems or cause plant transients." See the attached response.

There are no new commitments contained in this submittal.

If you have questions, please contact Oscar Pipkins at (504) 739-6707.

I declare under penalty of perjury that the foregoing is true and correct. Executed on December 18, 2007.

Sincerely, KTW/ZPP/ssf

Attachment:

1. Response to NRC RAI on Generic Letter 2007-01

,41 a -7 LCIN

W3F1 -2007-0065 Page 2 cc: Mr. Elmo E. Collins, Jr.

Regional Administrator U. S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 NRC Senior Resident Inspector Waterford Steam Electric Station Unit 3 P.O. Box 822 Killona, LA 70066-0751 U. S. Nuclear Regulatory Commission Attn: Mr. N. Kalyanam Mail Stop O-07D1 Washington, DC 20555-0001 Wise, Carter, Child & Caraway ATTN: J. Smith P.O. Box 651 Jackson, MS 39205 Winston & Strawn ATTN: N.S. Reynolds 1700 K.Street, NW Washington, DC 20006-3817 Morgan, Lewis & Bockius LLP ATTN: T.C. Poindexter 1111 Pennsylvania Avenue, NW Washington, DC 20004

1 to Attachment W3F1 -2007-0065 Generic Letter 2007-01 Response to NRC RAI on to W3F1 -2007-0065 Page 1 of 1 In NRC letter dated November 20, 2007, the following three requests were made for additional information. The associated response is provided along with each request for information.

1. Provide the type of cable insulation for the cable failures included in Waterford 3 response to GL 2007-01.

Response

One cable failure was identified in the original response submitted via Entergy Letter W3F1 -2007-0017 dated May 3, 2007. The insulation type for that cable is Ethylene Propylene Rubber. The cable is a 250 MCM aluminum conductor cable, rated at 5 kv.

2. Discuss any exceptions and/or deviations, if any, from the NEI guidance, as supplemented by the NRC additional guidance.

Response

Waterford 3 performed the research on underground cable failures in accordance with NEI guidance. The methodology of the search did not deviate from the additional guidance supplemented by the NRC.

3. If Waterford 3's response to GL 2007-01 excluded cable failures based on the NEI guidance (i.e., not following NRC guidance in the NRC letter dated April 13, 2007),

provide the data for these failures as requested in GL 2007-01.

Response

Response to this question is not applicable (see response to question 2 above).

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