PNO-I-97-069, on 971105,Nine Mile Point Unit 2,shutdown to Evaluate & Repair Recirculation Water Flow Control Valve Problem.Resident Staff Observed Plant Shutdown W/No Immediate Concerns Identified.Licensee Issued Press Release
| ML17059B760 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 11/06/1997 |
| From: | Doerflein L, Norris B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| References | |
| PNO-I-97-069, PNO-I-97-69, NUDOCS 9711070182 | |
| Download: ML17059B760 (4) | |
CATEGORY y REGULATORY INFORMATION DISTRIBUTION SYSTEM (RZDS)
ACCESSION NBR:9711070182 DOC.DATE: 97/11/06 NOTARIZED:
NO FACIL:50-410 Nine Mile Point Nuclear Station, Unit 2, Niagara Moha AUT~.NAME AUTHOR AFFILIATION NORRIS,B.
Region 1 (Post 820201)
DOERFLEIN,L.
Region 1 (Post 820201)
RECIP.NAME RECIPIENT AFFILIATION DOCKET g 05000410
SUBJECT:
PNO-I-97-069:on 971105,Nine Mile Point Unit 2,shutdown to evaluate
& repair recirculation water flow control valve problem. Resident staff observed plant shutdown w/no immediate concerns identified. Licensee issued press release.
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TITLE: 50 Docket
& Vendors PNO/Non-Routine Event/Safeguards Event (PN)
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'(~X.
November 6,
1997 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-I-97-069 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 I staff in King of Prussia, Pennsylvania on this date.
~Pacili,t Niagara Mohawk Power Nine Mile Point 2
Lycoming,New York Dockets':
50-410 Corp.
Licensee Emer enc Classification Notification of Unusual Event Alert Site Area Emergency General Emergency X Not Applicable
Subject:
UNPLANNED SHUTDOWN GREATER THAN 72 HOURS On November 5,
- 1997, Nine Mile Point Unit 2
(NMP2) was shutdown to evaluate and repair a recirculation water flow control valve (FCV) problem.
On November 4, the "A" recirculation water FCV locked-up,
'as
- designed, in response to a rapid change in valve position indication.
Although no actual change in recirculation flow occurred, the indicated FCV position changed from approximately 65 percent open to 44 percent open.
Subsequently, the "A" FCV drifted closed slightly, and operators took actions, in accordance with their procedures, to hydraulically lock the valve in place.
At no time did the recirculation loop flow mismatch exceed the technical specification limits. Initial troubleshooting determined the problem to be associated with the valve position feedback loop, located within the drywell, and that a plant shutdown would be required for repair.
At 9:49 a.m.,
on November 5, operators commenced lowering power of NMP2; completing the shutdown at 5:00 p.m.
The resident staff observed the plant shutdown with no immediate concerns identified.
The licensee anticipates the outage duration to be approximately five days, with start-up planned for Monday, November 10.
The resident inspectors are following the outage and monitoring licensee activities.
The licensee has issued a press release.
The Region I Office of Public Affairs is prepared to respond to media inquiries.
The state of New York has been notified.
The information is current as of 10:00 a.m.,
November 6,
1997.
Contact:
'Barry Norris (315)342-4041 Larry Doerflein (610)337-5378 97ii070182 97iiOb PDR ICE PNO-E-97-0h9 PDR
0 J