ML20096D887
| ML20096D887 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 05/12/1992 |
| From: | Sieber J DUQUESNE LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9205180286 | |
| Download: ML20096D887 (2) | |
Text
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a y Power Stat.on Shippmgport. PA 15077-00rA (412) 393 8JS$
JOHN D SIEBER vice Ptesident - % clear Gmup May 12e 1992 U.
S.
Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
Subject:
Beaver Valley Power Station, Unit No. 1 and No. 2 BV-1 Docket No. 50-334, License No. DPR-66 BV-2 Docket No. 50-412, Licenso No. NPF-73 Annual Report of All Challenges to the Pressurizer Power Operated Relief Valves or Safety Valves (Rovision 1) i This report is submitted in accordance with the Beaver Valley l
Power Station Units No.
1 and 2 Technical Specification 6.9.1.5.b.
This revision corrects the Unit 2 information previously submitted on April 10, 1992.
Unit 11 There were three challenges to the pressurizer safety and power operated relief valves (PORV) at Unit 1
during the period of January 1, 1991, to December 31, 1991.
1.
Date:
April 13, 1991 Plant Conditions:
Mode 4, RCS pressure was 300 p31, Overpres-9 sure Protection System (OPPS) was in service.
A cooldown to Mode 5 was in progress.
Summary:
Pressurizer Power Operated Relief Valve, PCV-RC-445C, opened while OPPS was in service due to RCS pressure slowly reaching 327 psig.
Pressure decreased to 303 psig and PORV reclosed.
2.
Date:
July 4, 1991 Plant Conditions:
Mode 4, RCS pressure was 315 psig, Overpres-sure Protection System (OPPS) was in service.
A cooldown to Mode 5 was in progress.
Summary:
Pressurizer Power-Operated Relief Valve, PCV-RC-445C, opened for 37 sect ils then reclosed, while reactor operator was controlling RCS pressure in a narrow band to maintain RC-P-1C
,ca;;.o-seal delta-pressure and seal leakoff flow, jUVv0U i
n 920S180286 920512 h
PDR ADOCK 05000334
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e Beaver Valley Power Station, Unit No. 1 and No. 2 BV-1 Docket No. 50-334, License No. DPR-66 BV-2 Docket No. 50-412, License No. NPF-73 Annual Report of All Challenges to the Pressurizer Power Operated Relief Valves or Safety Valves (Revision 1)
April 7, 1992 Page 2 3.
Date:
September 21, 1991 Plant Conditions:
Mode 5,
RCS pressure was 360 psig, Overpres-sure Protection System (OPPS) was in service.
Summary:
Pressurizer Power Operated Relief Valve, PCV-RC-455C, opened for 10 seconds then reclosed.
The cause for actuation was unknown.
No over-pressure condition existed.
E71t 2:
There was one challenge to the pr ssurizer safety and power operated rollef valves (PORV) at Unit 2 during the perled of January 1,
1991, to December 31, 1991.
1.
Date:
November 26, 1991 Plant Conditions:
Mode 1
at 100 percent reactor power, RCS pressure and temperature at normal operating values.
Summary:
A reactor / turbine trip occurred due to closure of three of four governor valves.
2RCS*PCV455C opened for 1.546 seconds then reclosed.
Tne cause for actuation
. was the primary system pressure increase following the load rejection.
Sincerely, 2*
~
Sieber cc:
Mr. L. W.
Rossbach, Sr.
Resident Inspector Mr. T. T. Martin, NRC Region I Administrator Mr. A.
W.
DeAgazio, Project Manager Mr. M.
L. Bowling (VEPCO) j l
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