View source for PNO-I-97-077, on 971216,Duquesne Light Co Initiated Unit 2 Reactor Shutdown in Accordance W/Ts 3.0.3.Licensee Plans to Address Unit 2 Design Deficiency for CR Emergency Air Cleanup & Pressurization,During Shutdown

{{Adams
| number = ML20203F492
| issue date = 12/17/1997
| title = PNO-I-97-077:on 971216,Duquesne Light Co Initiated Unit 2 Reactor Shutdown in Accordance W/Ts 3.0.3.Licensee Plans to Address Unit 2 Design Deficiency for CR Emergency Air Cleanup & Pressurization,During Shutdown
| author name = Eselgroth P, Kern D
| author affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION I)
| addressee name = 
| addressee affiliation = 
| docket = 05000412
| license number = 
| contact person = 
| document report number = PNO-I-97-077, PNO-I-97-77, NUDOCS 9712170393
| document type = PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO,, TEXT-INSPECTION &amp; AUDIT &amp; I&amp;E CIRCULARS
| page count = 1
}}
{{#Wiki_filter:b December 17, 1997 PRELIhINARY NOTIFICATION OF EVENT OP UNUSUAL OCCURRENCE PNO-I-97-077 Thia preliminary notification constitutes EARLY notice of events of POSSIBLE ccfcty or public interest significance. The information is as initially rccalved without verification or. evaluation, and is basically all that is known by Region I staff in King of Prussia, Pennsylvania on this date.
E&Ellity                                             Licensee Emeroency Classification Duqucane Light Co.                                     Notification of Unusual Event B:cvar Valley 2                                        Alert Shippingport, Pennsylvania                             Site Area Emergency Dock:ts: 50-412                     ,'
General Emergency X Not Applicable

==Subject:==
BEAVER VALLEY UNIT 2 SHUTDC nN GREATER THAN 72 HOURS At11:00 p.m. on December 16, 1997, Duquesne Light Company (DLC) initiated              1 a Unit 2 reactor shutdown in accordance with TS 3.0.3. DLC has datcrmined that the control Room Emergency Air Cleanup and Pressurization Syctcm does not meet its design basis. The cystem design may not meet tha cingl++ failure criteria.      Specifically, several conditions exist wh rcby upon failure of the emergency ventilation supply A train, the B train may not provide sufficient filtered air flow to meet design trcquirements. The licensee discovered this during engineering followup o2 on anomaly identified by the' Operations staff during surveillance tcsting. Preliminary reviews indicate that this is an original conctruction design deficiency.
During the shutdown, the licensee plans to address the Unit 2 design daficiency for the Control Room Emergency Air Cleanup and Pressurization Syrtem. This deficiency also has the potential to further delay the plcnned Unit 1 startup due to Unit 1 TS reliance on availability of one trcin of the Unit 2 system.      In addition, the licensee plans to replace thn Unit 2 B reactor coclant pump seal which has exhibited elevated first cttga seal leakoff, replace one or two high head safety injection (HHSI) pump recirculation line orifices as a corrective action to address gas cccumulation problems in the HHSI system, and correct wiring diccrepancien in the digital control rod posicion indication system.             The forcad outage is scheduled to last at least 12 days.
The contents of the PNO have been communicated to the Pennsylvania, Ohio cnd West. Virginia state governments. The resident inspectors monitored               j tha unit shutdown from the control room and will review licenree rc olution to this design deficiency.
R:gion I Public Affairs is prepared to respond to media inquiries.
Contnct:     Peter Eselgroth           David Kern (610)337-5234             (412)643-2000
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