ML20236U511

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PN--75-055A:on 750728,during Rerun of Loss of Offsite Power Test,Expansion Joint in Service Cooling Water Line to a DG Developed Leak Which Sprayed Water Into DG Room.Cause of Expansion Joint Failure Being Investigated by Licensee
ML20236U511
Person / Time
Site: Millstone Dominion icon.png
Issue date: 07/29/1975
From: Jennifer Davis, Dreher F, Thornburg H
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PN-75-055A, PN-75-55A, NUDOCS 9807300216
Download: ML20236U511 (1)


Text

__ _ _ _______ _ __ ________ _ - _ _ . ..

l PRELIMINARY NOTIFICATION - NOT FOR PUBLIC DISCLOSURE July 29, 1975

[ PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PN-75-55A This preliminary notification constitutes EARLY notice of events of

..p POSSIBLE safety or public interest significance. The information presented is as initially received without verification or evaluation and is basically all that is known by OIE staff as of 10:00 a.m. o_n date of this notification. IT SHCULD BE SPECIFICALLY NOTED THAT THIS NOTIFICATION MAY CONTAIN INFORMATION THAT LATER MAY BE DETERMINED TO BE INACCURATE OR INCONSISTENT. AN OFFICE OF INSPECTION AND ENFORCEMENT NOTIFICATION OF AN INCIDENT OR OCCURRENCE (BLUE SHEET) SUBSEQUENTLY MILL BE ISSUED IF WARRANTED.

-Facility: Millstone 2 (DN 50-336)

Northeast Nuclear Energy Company

Subject:

LEAK ON EXPANSION JOINT IN SERVICE WATER LINE TO "A" DIESEL GENERATOR During a rerun of the loss of offsite power test on July 28, 1975, the expansion joint in the service cooling water line to the "A" diesel gen-  ;

erator developed a leak which sprayed water into the diesel generator room. No equipment suffered water damage. . ,

-This is the same service water line that f ailed on July 22, 1975.

(Reference PN-75-55, dated July 23,.1975) k.. The cause of the expansion joint failure is being investigated and evaluated by the licensee. Depending on the progress of the licensee's evaluation a delay of several days in the issuance of the operating license is expected. Issuance of a license to permit fuel loading could occur this wee.k.

Media interest is not expected. The State of Connecticut has not been informed. A press release is not planned.

OIE (Region I) received notification of th$s occurrence by telephone from R. L. Spessard, our inspecter who was at the site, at 10:00 a.m.

on 7/29/75. ,#

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Contact:

FADreher, IE x7353 HDThornburg, IE x7353, JGDavis, IE x7541 e  ;. o

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