ML060940173
| ML060940173 | |
| Person / Time | |
|---|---|
| Site: | Watts Bar  |
| Issue date: | 04/04/2006 |
| From: | Nolan M NRC/OE |
| To: | |
| Trocine L | |
| References | |
| EA-05-169 EN-06-011 | |
| Download: ML060940173 (2) | |
Text
April 4, 2006 EN-06-011 OFFICE OF ENFORCEMENT NOTIFICATION OF SIGNIFICANT ENFORCEMENT ACTION Licensee: Tennessee Valley Authority (EA-05-169)
Watts Bar Nuclear Power Plant Docket No. 05000390
Subject:
ISSUANCE OF FINAL SIGNIFICANCE DETERMINATION AND NOTICE OF VIOLATION This is to inform the Commission that a Notice of Violation associated with a White significance determination process finding will be issued on or about April 7, 2006, to Tennessee Valley Authority as a result of inspections at the Watts Bar Nuclear Power Plant. This White finding, an issue with low to moderate increased importance to safety, involved a challenge to reactor coolant system (RCS) integrity by multiple pressurizer power-operated relief valve (PORV) actuations and a challenge to RCS inventory control by the loss of RCS coolant via the open PORVs which occurred on February 22, 2005, during transition to solid plant operations. From a defense-in-depth perspective, unlike most other accident initiators that can lead to core damage, a low temperature overpressure event could result in the reactor pressure vessel being unavailable for either subsequent recovery of the reactor core or as an additional barrier for fission product retention.
A Notice of Violation is included because this White finding was associated with a violation of Technical Specification 5.7.1.1 and Procedure GO-6, Unit Shutdown from Hot Standby to Cold Shutdown, in that TVA personnel failed to slowly raise charging flow to fill the pressure at less than 30 gallons per minute a required by procedure.
It should be noted that the licensee has not been specifically informed of the enforcement action. The schedule of issuance and notification is:
Mailing of Final Significance Determination April 7, 2006 Telephone Notification of Licensee April 7, 2006 The State of Tennessee will be notified.
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
Distribution:
OWFN OWFN TWFN Regional Offices Chairman Diaz EDO OCFO RI RII Comm. McGaffigan DEDR OP CENTER RIII RIV Comm. Merrifield DEDE NMSS Comm. Lyons OE OIG Comm. Jaczko OGC OCIO MAIL NRR RES ADAMS SECY NSIR ACRS OCA OI PA SP IP File Name: E:\Filenet\ML060940173.wpd ADAMS ML060940173 OE:ES OE:C LTrocine CNolan 03/31/05 04/04/06 PRELIMINARY INFORMATION - NOT FOR PUBLIC DISCLOSURE UNTIL VERIFICATION THAT LICENSEE HAS RECEIVED ACTION