ML083120428
| ML083120428 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 10/30/2008 |
| From: | Garrett T J Wolf Creek |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| ET 08-0049 | |
| Download: ML083120428 (3) | |
Text
W61LF CREEK INUCLEAR OPERATING CORPORATION October 30, 2008 Terry J. Garrett Vice President, Engineering ET 08-0049 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555
Reference:
Letter dated, September 3, 2008, from J. N. Donohew, USNRC to R. A. Muench, WCNOC
Subject:
Docket No. 50-482: Request for Additional Information Related to Submerged Safety-Related Medium Voltage Power Cables Gentlemen:
The reference requested additional information (RAI) concerning submerged safety-related medium voltage power cables at the Wolf Creek Generating Station (WCGS). Wolf Creek Nuclear Operating Corporation (WCNOC) has reviewed the Nuclear Regulatory Commissions (NRC) request for additional information and conferred with Nuclear Energy Institute (NEI)regarding the recommendations of NEI 06-05. WCNOC will respond to NRC concerns by periodically inspecting and dewatering manholes containing safety related medium voltage cables. Experience obtained from dewatering will be evaluated, and the dewatering frequency adjusted, or modifications implemented, as required to prevent long-term submergence of safety related medium voltage cables.Based upon the decision to dewater manholes containing safety related medium voltage cables, response to the RAI questions regarding cable submergence and the submittal of additional documentation is no longer necessary.
This course of action was discussed during a teleconference with the NRC on October 7, 2008.During the teleconference call on October 7, 2008, WCNOC was requested to discuss testing of these cables. Currently there is no valid test that will measure aging of the cables. However, the subject cables are subjected to insulation resistance tests. In accordance with preventive maintenance activities, these insulation resistance test results have been acceptable and do not show an adverse trend. These tests have been performed periodically for at least 9 years.P.O. Box 411 / Burlington, KS 66839 / Phone: (620) 364-8831 An Equal Opportunity Employer M/F/HCNET ET 08-0049 Page 2 of 2 The attachment lists the commitments contained in this letter. WCNOC has commenced dewatering manholes containing the safety related medium voltage cables. Because of the potential for adverse conditions that may limit dewatering progress, WCNOC has not provided a firm completion date. After the initial dewatering, the inspection frequency will be, adjusted based upon actual plant experience.
Completion dates and corrective actions will be documented in the WCNOC corrective action program.If you have any questions concerning this matter, please contact me at (620) 364-4084, or Mr.Richard Flannigan at (620) 364-4117.Sincerely, Terry J. Garrett Attachment TJG/rlt cc: E. E. Collins (NRC), w/a J. N. Donohew (NRC), w/a V. G. Gaddy (NRC), w/a B. K. Singal (NRC), w/a Senior Resident Inspector (NRC), w/a Attachment to ET 08-0049 Page 1 of 1 LIST OF COMMITMENTS The following table identifies those actions committed to by Wolf Creek Nuclear Operating Corporation in this document.
Any other statements in this letter are provided for information purposes and are not considered regulatory.
commitments.
Please direct questions regarding these commitments to Mr.-Richard Flannigan, Manager Regulatory Affairs at Wolf Creek Generating Station, (620) 364-4126.REGULATORY COMMITMENT DUE DATE Wolf Creek Nuclear Operating Corporation (WCNOC) will As conditions periodically inspect and dewater manholes containing safety permit *related medium voltage cables. Experience obtained from dewatering will be evaluated, and the dewatering frequency adjusted to prevent long-term submergence of safety related medium voltage cables. -_* Dewatering is contingent on plant conditions, plant schedule, weather, and equipment availability.