ML20211D541
| ML20211D541 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 02/09/1987 |
| From: | Sieber J DUQUESNE LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 8702240023 | |
| Download: ML20211D541 (2) | |
Text
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'Af DuquesneLlidit Tetephone (412) 393-6000 Nuc' ear Group P.O. Box 4 Shippingport PA15077-0004 February 9, 1987 U. S. Nuclear Regulatory Commission Attn:
Document Control Desk washington, DC 20555
Reference:
Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 Annual Report of all Challenges to the Pressurizer Power Operated Relief Valves (PORVs) or Pressurizer Safety Valves Gentlemen:
This report is submitted to you in accordance with the Beaver Valley Power Station Unit No. 1 Technical Specification 6.9.1.5.b.
During the year 1986 there were two challenges to the Pressurizer Power Operated Relief Valves (PORVs).
These two challenges are described below.
No challenges to the Pressurizer Safety Valves occurred.
1.
Date:
August 8, 1986 Plant Mode 5, RCS pressure was 310 psig, RCS Conditions:
temperature was
- 160F, Overpressure Protection System (OPS) was in service.
Summary:
A spurious actuation of Pressurizer Power Operated Relief Valve (PCV-RC-455C) occurred due to an electrical perturbation experienced during a
start of the 1D Cooling Tower Pump.
No actual overpressure condition existed.
2.
Date:
November 3, 1986 Plant Mode 1 at 100% reactor power, RCS pressure was Conditions:
2235
- psig, RCS temperature was
- 576F, normal steady state operations.
Summary:
An actuation of Pressurizer Power Operated Relief Valve (PCV-RC-455D) occurred due to an RCS pressure rise.
The pressure rise resulted from a Loss of Vital Bus II which caused increased charging flow and a
letdown isolation.
The increased charging flow caused an increasing pressurizer level and corresponding RCS pressure 8702240023 B70209 A
PDR ADOCK 05000334 0j PDR py 9
~BcavarLVallcy Powar' Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 Annual Report of all Challenges to the Pressurizer Power
-Operated Relief Valves (PORVs) or Pressurizer Safety-Valves Page 2 increase.
The Power Operated Relief Valve setpoint was reached and pressure was relieved.
Pressurizer Spray Valves were inoperable due to the Loss of Vital Bus II.
If you have any questions regarding this report please contact me.
Very truly yours, D. Sieber ice President, Nuclear cc: Director, Office of Nuclear Regulatory Research United States Nuclear Regulatory Commission Washington, DC 20555 Mr. W. M. Troskoski, Resident Inspector U.
S. Nuclear Regulatory Commission Beaver Valley Power Station Shippingport, PA 15077 U.
S. Nuclear Regulatory Commission Regional Administrhtor Region 1 631 Park Avenue
' King of Prussia, PA 19406 Mr. Peter S. Tam i
U.
S. Nuclear Regulatory Commission Project Directorate No. 2 Division of PWR Licensing - A l
Washington, DC 20555 l
- Mail Stop 340 Addressee only Director, Safety Evaluation & Control i
Virginia Electric & Power Company i
P.O. Box 26666 l
One James River Plaza Richmond, VA 23261 l
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