ML20203G681

1997 Annual Rept of Pressurizer PORV or Pressurizer Safety Valve Challenges, for Beaver Valley Power Station

ML20203G681
Person / Time
Site:	Beaver Valley
Issue date:	12/31/1997
From:	Jain S DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L98-026, L98-26, NUDOCS 9803030042
Download: ML20203G681 (2)

Text

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@ y W3ey Power Stat 6on Shtpingport, PA 15077 0004

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• N undent ruNi$U$M N*Ur x N$wision February 26, 1998 L-98-026 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555-0001

Subject:

Beaver Valley Power Station, Unit No. I and No. 2 BV-1 Docket No. 50-334, License No. DPR 66 BV-2 Docket No. 50-412, License No. NM '.'3 g Annual Repoit of All Challenges to the Pressurizer Power Operated Relief or Pressurizer Safety Valves Attached is the annual report for 1997 of all challenges to the pressurizer power operated relief valves (PORV) or the pressurizer safety valves at Beaver Valley Power Station Unit Nos. I and 2.

Sincerely, Sushil C. Jain Attachment c: Mr. D. S. Brinkman, Sr. Project Manager ,

Mr. D. M. Kern, Sr. Resident Inspector ,

Mr. H. J. Miller, NRC Region I Administrator '

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.# , Beaver VaHey Pcwer Station 1997 Annusi Repot . of Pressurizer PORV or Pressurizer Safety Valve Chalkrign This report is submitted in accordar.ce with the Beaver Valley Power Station Unit Nos 1 and 2 Technical Specifications 6.9.1.4 and 6.9.1.5.b.

1! Bill:

There was one challenge to the Power Operated Relief Valves (PORV) at Unit I during the period of January 1,1997, to December 31,1997.

Date: July 18,1997 Plant Condition: Mode 5, Reactor Coolant System (RCS) pressure was 378 psig, Overpressure Protection System (OPPS) was in service. Shutdown of RC-P-I A in progress.

Summary: Pressurizer PORV, PCV-RC-455C, momentarily opened as a result of a slow pressure rise of the RCS. When RC-P-l A was shut down, the RCS experienced reduced spray to the pressurizer. The effect was an increasing pressure nse until the OPPS system received an actuating signal from PT-RC-403. The PORV remained open until RCS pressure had decreased to 348 psig as indicated by PT-RC-402 and 375 psig as indicated by PT-RC-403.

There were no challenges to the pressurizer safety valves at Unit I during the period of

January 1,1997, to December 31,1997.

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. There was one challenge to the PORVr. at Unit 2 during the period of January 1,1997, to December 31,1997.

Date: October 2,1997 Phnt Condition: Mr.le 1. RCS pressure was 2235 psig, Normal Operating Parameters.

?RC3*PCV455C opened for approximately 7 seconds.

Summary: Plant operating in Mode 1,100% power when a comparator card failure caused 2RCS*PCV455C to open until the Reactor Operator placed the control switch to close and energized two additional banks of pressurizer heaters to restore pressure. During the transient, pressure decreased from 2235 psi to 2180 psi.

There were no challenges to the pressurizer safety valves at Unit 2 during the period of January 1 1997, to December 31,1997.

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