ML20063M141

Ro:On 820731,during Hot Shutdown,Leak Observed Coming from Control Rod Drive Mechanism Valve for Rod L-11.Leak Identified as Abnormal Degradation of RCPB

ML20063M141
Person / Time
Site:	Robinson
Issue date:	08/03/1982
From:	Starkey R CAROLINA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
RSEP-82-1336, NUDOCS 8209100159
Download: ML20063M141 (1)

Text

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e. l Form 244 Carolina Power & Light Company neemraw rmm=:n =2 mm 1

ro H. B. ROBINSON STEAM ELECTRIC PLANT .2 6 ..

Company Correspondence F POST OFFICE BOX 790 o

/*h HARTSVILLE, SOUTH CAROLINA 29550 o T August 3, 1982 Robinson File No: 13510C Serial: RSEP/82-1336 Mr. James P. O'Reilly Regional Administrator U. S. Nuclear Regulatory Commission CC ,

Region II 101 Marietta Street, Suite 3100 k

Atlanta, Georgia 30303 V

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-l o H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 2*;y DOCKET No. 50-261 2, oA LICENSE NO. DPR-23

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C 09 PROMPT NOTIFICATION - CRDM VENT VALVE LEAK b

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Dear Mr. O'Reilly:

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In accordance with Section 6.9.2 of the Technical Specifications for the H. B. Robinson Steam Electric Plant, Unit 2, the following event is reported:

• On July 31, 1982, at approximately 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br />, the control rod drive mechanism (CRDM) for rod L-11 was observed to have steam coming from around the lifting ring on the top of the drive rod tube. This leak has been identified as coming from the 1/4-inch vent valva at the top of the CRDM.

The plant was at hot shutdown returning from a refueling outage at the time of discovery and cooldown was commenced. On August 3, 1982, this event was identified as an abnormal degradation of a reactor coolant pressure boundary and is being reported pursuant to Technical Specification 6.9.2.a.3.

NRC Region II and Mr. B. J. Furr, Vice President - Nuclear Operations, were notified of this event on August 3,1982.

Very truly yours, 7

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R. B. Starkey, J -

General Manager H. B. Robinson S.E. Plant HTC:Ja 4,C.0

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