ML19290B697

RO-1-79-98:on 791019,reactor Core Isolation Cooling Turbine Failed to Start.Caused by Sheared Bolt on Steam Exhaust Check Valve F040.Unit Resumed Power,Valve Repaired & Leak Test Satisfactorily Completed

ML19290B697
Person / Time
Site:	Brunswick
Issue date:	11/15/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:
References
NUDOCS 7912130539
Download: ML19290B697 (1)

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. Telecopied to NRC 11/15/79 Cp&L Carolina Power & Light Company Brunswick Steam Electric Plant P. O. Box 458 Southport, NC 28461 November 15, 1979 FILE: B3516 SERIAL: BSEP/79-1117 Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Co= mission Region II 101 Marietta Street, Suite 3100 Atlanta, GA 30303 BRUNSWICK STEAM ELECTRIC PLANT, L' NIT NOS. 1&2 LICENSE NO. DPR-71 DOCKET NO. 50-325 CONFIRMATION: FACSIMILE FOR AN IMMEDIATELY REPORTABLE EVENT (1-79-98)

Dear Mr. O'Reilly:

This facsimile confirms the conversation between Mr. J. M. Brown and Mr.

B. W. Riley, of your office, at 1530 on November 15, 1979.

On October 19, 1979, the RCIC turbine failed to start due to a sheared bolt on the steam exhaust check valve F040 (LER 1-79-74). The unit resu=ed power operation with the RCIC system under an LCO condition while awaiting parts to repair the check valve. On November 15, 1979, the valve was repaired and a leak rate test was performed.

The test results exceeded that allowed by Technical Specifications 3.6.1.2b.

An investigation revealed that the broken bolt with its accompanying nut had become lodged in the seat of RCIC steam exhaust isolation valve F001. The bolt and nut were removed, the seat and disk inspected for damage (none found), and the leak rate test completed satisfactorily.

This event is reported under Technical Specifications 6.9.1.8b.

Very truly yours, A. C. Tollison, Jr., General Manager Brunswick Steam Electric Plant RMP/sgb Mol S

cc: B. J. Furr O 1553 355

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