ML20100G770
| ML20100G770 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 02/16/1996 |
| From: | Jain S DUQUESNE LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9602260157 | |
| Download: ML20100G770 (2) | |
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February 16, 1996 Shippingport PA 15077-0004 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555-0001
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, License No. NPF-73 Revised Annual Report of Challenges to the Pressurizer Power Operated Relief Valvca or Safety Valves This is a revised report to the Duquesne Light Company submittal dated February 9,1994, which was submitted in accordance with the Beaver Valley Power Station Unit Nos. I and 2 Technical Specification 6.9.1.5.b.
Unit 1:
i There were two challenges to the pressurizer power operated relief valves (PORVs) at Unit I during the period of January 1,1993 to December 31,1993.
1.
Date:
June 10,1993 Plant Conditions:
Mode 4, Reactor Coolant System (RCS) pressure was 380 psig, Overpressure Protection System (OPPS) was not in service. A cooldown to Mode 5 was in progress.
Summary:
Pressurizer Power Operated Relief Valve, PCV-RC-455C, momentarily opened while attempting to place OPPS in service. OPPS was placed into service while RCS pressure was in the " trip-reset" region for comparator operations for the PORV.
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Beaver Valley Power Station, Unit No. I and No. 2
'.Revisid Annual Report of Challenges to the Pressurizer Power Operated Relief Valves or Safety Valves Page 2 2.
Date:
November 7,1993 Plant Conditions:
Mode 4, Reactor Coolant System (RCS) pressure was 385 psig, Overpressure Protection System (OPPS) was not in service. A cooldown to Mode 5 was in progress.
Summary:
Pressurizer Power Operated Relief Valve, PCV-RC-455C, momentarily opened as OPPS was placed into service, reducing RCS pressure by 6 psig.
OPPS was placed into service while RCS pressure was in the " trip-reset" region for comparator operations for the PORV.
There were no challenges to the pressurizer safety valves during the period.
Unit 2:
There were no challenges to the pressurizer safety or power operated relief valves at Unit 2 during the period of January 1,1993, to December 31,1993.
Sincerely, Sushil C. Jain Division Vice President, Nuclear Services c:
Mr. L. W. Rossbach, Sr. Resident Inspector Mr. T. T. Martin, NRC Region I Administrator Mr. D. S. Brinkman, Sr. Project Manager
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