ML20203J332
| ML20203J332 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 07/16/1986 |
| From: | Tucker H DUKE POWER CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8608050243 | |
| Download: ML20203J332 (2) | |
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|---|---|
Category:REPORTABLE OCCURRENCE REPORT (SEE ALSO AO LER)
MONTHYEARML20216E5401999-09-0707 September 1999
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DUKE POWER GOMPANY P.O. BOX 33180 CHAMLOTTE, N.O. 28242 HALB. TUCKER MuMME m
00 LEA. P.ODEICTION July 16, 1986 Dr. J. Nelson Grace, Regional Administrator U.S. Nuclear Regulatory Constission - Region II 101 Marietta Street, NW, Suite 2900 2
Atlanta, Georgia 30323 E
Subject:
Catawba Nuclear Station, Unit 2 Dock.et No. 50-414
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Dear Dr. Grace:
Pursuant to Technical Specification 3.4.9.3, Action Statement c, please find attached a Special Report concerning the automatic opening of a pressurizer power-operated relief valve.
Very truly yours,
/ BB%
Hal B. Tucker RWO/20/jgm Attachment xc: Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 NRC Resident Inspector Catawba Nuclear Station 8608050243 860716 PDR ADOCK 05000414 s
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o-SPECIAL REPORT LIFIED VAIVE 2NC32 (NC PORV)
Circumstances Initiating The Transient:
On June 16, 1986 during unit startup, valves 2NC-32 and 2NC-34 (pressurizer PORV's) were in the low pressure (L/P) mode. This reduces the lift setpoint of the PORV's to 400 psig. At 0053 hours6.134259e-4 days <br />0.0147 hours <br />8.763227e-5 weeks <br />2.01665e-5 months <br /> on June 16, 1986 "D" Reactor Coolant pump was started. Pressure increased from 330 psig to approximately 350 psig and stabilized at that point. At 0056 hours6.481481e-4 days <br />0.0156 hours <br />9.259259e-5 weeks <br />2.1308e-5 months <br /> "B" Reactor Coolant pump was started.
Two minutes later, valve 2NC-32 lifted for approximately 1 second.
Effect of PORV On The Transient:
After the PORV lifted for approximately 1 second, pressure decreased to approximately 350 psig. The remaining two Reactor Coolant pumps were started with no further difficulty.
Corrective Action To Prevent Recurrence:
A statement will be added to the limits and precautions section of the procedure for starting Reactor Coolant Pumps. This statement will caution the operators on pressure spikes that can result from starting a pump.
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