PNO-II-98-027, on 980520,licensee Identified That non- Isolable Leak Existed on 2-inch Isolation Valve for a Reactor Coolant Loop Stop Valve Bypass Flow Instrument. Licensee Currently Developing Plans to Replace Valve
| ML18152B820 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 05/21/1998 |
| From: | Haag R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| References | |
| PNO-II-98-027, PNO-II-98-27, NUDOCS 9805270432 | |
| Download: ML18152B820 (1) | |
e May 21, 1998 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-II-98-027 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by Region II staff in Atlanta, Georgia on this date.
Facility Virginia Power Co.
Surry 1 Surry,Virginia Dockets: 50-280 Licensee Emergency Classification X Notification of Unusual Event Alert
- Site Area Emergency General Emergency Not Applicable
Subject:
NOTIFICATION OF UNUSUAL EVENT; SHUTDOWN TO REPAIR VALVE LEAK On.May 20 while in hot shutdown, the licensee identified that a non-isolable leak existed on the 2-inch isolation valve for the A reactor coolant loop stop valve bypass flow instrument.
The leak, characterized as:a 2-inch steam plume, originated from a pin-hole type through-wall de~ect in the valve bonnet.
The licensee is currently developing plans to.isolate and replace the valve.
Per their emergency plan the licensee was in a Notification of Unusual Event classification from the initiation of the Technical Specification required shutdown due to a non-isolable leak at 4:24 p.m. on May 20 until 7:13 a.m. on May 21, when the unit obtained cold shutdown.
Prior to this discovery, the licensee was in the process of starting up from a shutdown on May 10 to repair a non-isolable leak on the seal inj*ection line to the Unit 1 C reactor coolant pump.
The Commonwealth of Virginia was informed.
The licensee does not plan to ma~e a press release.
This information is current as of 9:00 a.m. on May 21, 1998.
Contact:
ROBERT C. HAAG (404)562-4550 9805270432 980521 PDR I&E PNO-II-98-027 PDR
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