ML071280704
| ML071280704 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 05/03/2007 |
| From: | Walsh K Entergy Nuclear South, Entergy Operations |
| To: | Document Control Desk, NRC/NRR/ADRO |
| References | |
| GL-07-001, W3F1-2007-0017 | |
| Download: ML071280704 (5) | |
Text
m 6vvEnto2W Entergy Nuclear South Entergy Operations, Inc.
17265 River Road Killona, LA 70057 Tel 504 739 6660 Fax 504 739 6678 kwalshl @entergy.com Kevin T. Walsh Vice President, Operations Waterford 3 W3F1-2007-0017 May 3, 2007 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001
Subject:
Response to Generic Letter 2007-01 Waterford Steam Electric Station, Unit 3 (Waterford 3)
Docket No. 50-382 License No. NPF-38
Dear Sir or Madam:
References:
- 1. NRC Generic Letter 2007-01, dated February 7, 2007 "Inaccessible or Underground Power Cable Failures that Disable Accident Mitigation Systems or Cause Plant Transients" (ILN: 07-0021)
- 2. NEI letter from J. H. Riley to Administrative Points of Contact dated March 16, 2007 "Guidance for Response to GL 2007-01"
Dear Sir or Madam:
Per reference 1, the NRC issued Generic Letter (GL) 2007-01 to request facilities to submit the following information to the NRC within 90 days of the date of the Generic Letter:
(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.
(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).
The response to Question 1 is provided in the attachment to this letter. Waterford 3 has researched plant records and interviewed cognizant plant personnel concerning underground cable failures at the plant. In researching plant records for the requested Atýý7
W3F1-2007-0017 Page 2 information, Waterford 3 used the guidance provided in Reference 2 to clarify the population of cables of interest. Results of research indicate that Waterford 3, to date, has experienced one cable failure within the scope of Generic Letter 2007-01. The records research constituted searches of the Waterford 3 Plant Condition Reporting System (PCRS) and Maintenance Rule data.
In response to Question 2, Waterford 3 inspection, testing and monitoring practices presently include visual cable inspection during meggering of cables and connected equipment during maintenance activities. Plant condition reporting is used to determine root cause and extent of conditions and would be the process for determining the need for and the extent of any increased cable monitoring.
The requested information is being provided pursuant the requirements of 10 CFR 50.54(f).
I declare under the penalty of perjury that the foregoing information is true and correct.
Executed on May 3, 2007.
There are no new commitments contained in this submittal. If you have any questions, please contact Oscar Pipkins at (504) 739-6707.
Sincerely, KTW/OPP/ssf
Attachment:
- 1. History of Inaccessible or Underground Power Cable Failures Within the Scope of 1 OCFR50.65 for Waterford 3 SES
W3F1-2007-0017 Page 3 cc:
Dr. Bruce S. Mallett 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 to W3F1`-2007-0017 History of Inaccessible or Underground Power Cable Failures Within the Scope of 1 OCFR50.65 for Waterford 3 SES to W3F1-2007-0017 Page 1 of 1 History of Inaccessible or Underground Power Cable Failures within the Scope of 10CFR 50.65 for Waterford 3 SES Cable Type Voltage Class Manufacturer Date of Failure Type of Service Root Cause
/ Service (Yrs.)
Power Cable 5 kV Okonite or Anaconda 1st Quarter Feeder cable from Moisture Absorption (most 1/C 250 MCM 1992 /
3A2 to 3A4 (4160 likely root cause)
Approx 10 -12 kV)
Yrs