ML050960534
| ML050960534 | |
| Person / Time | |
|---|---|
| Site: | Watts Bar  |
| Issue date: | 04/06/2005 |
| From: | Nolan M NRC/OE |
| To: | |
| Trocine L, OE | |
| References | |
| EA-05-036 RN-05-010 | |
| Download: ML050960534 (2) | |
Text
PRELIMINARY INFORMATION - NOT FOR PUBLIC DISCLOSURE UNTIL VERIFICATION THAT LICENSEE HAS RECEIVED ACTION PRELIMINARY INFORMATION - NOT FOR PUBLIC DISCLOSURE UNTIL VERIFICATION THAT LICENSEE HAS RECEIVED ACTION April 6, 2005 RN-05-010 OFFICE OF ENFORCEMENT NOTIFICATION OF SIGNIFICANT REGULATORY ACTION Licensee:
Tennessee Valley Authority EA-05-036 Watts Bar Nuclear Power Plant, Unit 1 Docket No. 050-00390
Subject:
ISSUANCE OF FINAL SIGNIFICANCE DETERMINATION AND NOTICE OF VIOLATION This is to inform the Commission that one White Significance Determination Process finding will be issued on or around April 11, 2005, to Tennessee Valley Authority (TVA) as a result of inspections at Watts Bar Nuclear Power Plant, Unit 1. This White finding, an issue of low to moderate safety significance which may require additional NRC inspections, involved the licensees failure to promptly identify and correct silt blockage of the essential raw cooling water (ERCW) line to the 1A-A centrifugal charging pump (CCP). On November 22, 2004, while performing a manual valve exercising procedure, the licensees staff identified that the 1A-A CCP backup cooling line from the ERCW system was completely blocked with silt. The capability to provide ERCW cooling via this line is significant because the 1A-A CCP is the only high head pump provided with a backup source of raw cooling water. The line, which was subsequently cleared on the day of discovery, had last been tested during July of 2003.
A Notice of Violation is included based on a violation involving the requirements of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action, because TVA failed to promptly identify and correct a condition adverse to quality. Specifically, TVAs actions in response to the previous silt blockage problems did not constitute adequate corrective action to preclude silt blockage of the ERCW line to the 1A-A CCP. In addition, on December 8, 2004, TVAs corrective actions for the blockage of the ERCW line to the 1A-A CCP failed to include efforts to determine if there were other ERCW lines requiring more frequent monitoring that were not included in licensee technical instructions for ERCW Train A and B component flow blockage testing. In accordance with the NRC Enforcement Policy, NUREG-1600, the Notice of Violation is considered an escalated enforcement action because it is associated with a White finding.
It should be noted that the licensee has not been specifically informed of the regulatory action.
The schedule of issuance and notification is:
Mailing of Final Significance Determination April 11, 2005 Telephone Notification of Licensee April 11, 2005 The State of Tennessee will be informed.
Contacts:
L. Trocine, OE, 301-415-2319 C. Nolan, OE, 301-415-3360
PRELIMINARY INFORMATION - NOT FOR PUBLIC DISCLOSURE UNTIL VERIFICATION THAT LICENSEE HAS RECEIVED ACTION PRELIMINARY INFORMATION - NOT FOR PUBLIC DISCLOSURE UNTIL VERIFICATION THAT LICENSEE HAS RECEIVED ACTION Distribution:
OWFN Chairman Diaz Comm. McGaffigan Comm. Merrifield Comm. Lyons Comm. Jaczko SECY OCA PA IP OWFN EDO DEDR DEDE OE OGC NRR NSIR OI SP TWFN OCFO OP CENTER NMSS OIG OCIO RES ACRS Regional Offices RI RII RIII RIV MAIL ADAMS File Name: E:\\Filenet\\ML050960534.wpd ADAMS: ML050960534 OE:ES OE:C L Trocine CNolan 04/06/05 04/06/05