PNO-I-99-048, on 991022,operators Initiated Plant Shutdown from 100% Reactor Power,Due to Continued RCS Leakage Through B Pressurizer Code Safety Valve to Primary Relief Tank. Operators Are Reducing Reactor Power at 12% Per H

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PNO-I-99-048:on 991022,operators Initiated Plant Shutdown from 100% Reactor Power,Due to Continued RCS Leakage Through B Pressurizer Code Safety Valve to Primary Relief Tank. Operators Are Reducing Reactor Power at 12% Per H
ML20217J622
Person / Time
Site: Beaver Valley FirstEnergy icon.png
Issue date: 10/22/1999
From: Eselgroth P, David Kern
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
References
PNO-I-99-048, NUDOCS 9910250125
Download: ML20217J622 (1)


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e e

d October 22, 1999

)RELIMINARY MOTIPICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-I-99-04 8 his preliminary notification constitutes EARLY notice of events of POSSIBLE kafety or public interest significance. The information is as initially Leceived without verification or evaluation, and is basi,cally all that is

,nown by Region I staff in King of Prussia, Pennsylvania on this date.

acility Licensee Emercency Classification euquesne Light Co. Notification of Unusual Event eaver Valley 2 Alert

.hippingport, Pennsylvania Site Area Emergency ockets: 50-412 General Emergency X Not Applicable Jubject: BEAVER VALLEY UNIT 2 FORCED OUTAGE fn October 22, at 3:14 a.m. operators initiated a plant shutdown from 100 hercent reactor power due to continued reactor coolant system (RCS)

eakage through the "B" pressurizer code safety valve to the primary

'elief tank (PRT). Minor PRT inleakage had been trended since August, but the leakrate inc: sased to approximately 0.5 gallons per minute arlier this week. ' erators initiated frequent PRT venting to maintain ormal PRT pressure While venting the PRT, oxygen concentration in the ante gas system app.aached the 2 percent Technical Specification limit

'crr waste gas transfer. Both the identified RCS leakrate and waste gas

'yntem oxygen concentrations currently remain within the technical pecification limits. Operators are reducing reactor power at 12 percent

.er hour and plan to place the plant in Mode 5 (cold shutdown) to perform

[epairs. Planned maintenance includes repair of the leaking code safety alve and two leaking pressurizer power operated relief valves which were solated previously.

'he resident inspectors have monitored licensee evaluation of the PRT nieakage since August and are on-site monitoring the plant shutdown. ,

'he contents of this PN have been communicated to the Pennsylvania, Ohio (nd West Virginia state governments.

'ontact: P. Eselgroth D. Kern (610)337-5234 (724)643-2000 9910250125 991022 PDR I&E ena-r-ee-04a eda 3 16 noa44 O

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