ML20249B234
| ML20249B234 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 03/15/1976 |
| From: | Dreher F, Roy G, Thompson D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-76-042-01, PNO-76-42-1, NUDOCS 9806220213 | |
| Download: ML20249B234 (1) | |
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PREI INARY NOTIFICATION - NOT YOR E
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March 15, 1976 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -PNO-76-42 This preliminary notification constitutes EARLY notice of events of I.
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 4:00 p.m. on date of this notif.ication.
IT SHOULD 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 WILL BE ISSUED IF WARRANTED.
Facility: Peach Bottom 3 (DN 50-278)
Philadelphia Electric Company s
Subject:
REACTOR RECIRCULATION SYSTEM LEAK - SOCKET WELD While operating at 99% power, increased reactor coolant system leakage, approximately 6 gpm, into the containment drywell was noted at approxi-mately 6 a.m. on March 13, 1976.
Technical Specifications require the Plant to shutdown if the leak is 5 gpm or greater.
The reactor was shutdown by 12 noon and a drywell entry was made at 3:55 p.m.
to investigate the leak source.
The leak was found in an unisolatable 1" pressure tap line upstream of the "B" recirculation system (28" line), suction valve. The leak stemmed from an approximate 180 degree crack at the heat affected zone of a socket weld.
The leak occurred at the first pipe weld adjacent to the recirculation line.
The reactor was depressurized, the line removed at the crack, a plug in-o sorted, and a r.ap welded over the fitting in accerdance with code require-
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'I ments. The reactor is currently returning to power.
,6 Media interest is not expected. The State of Pennsylvania has been in-formed. A press release is not planned.
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Region I, NRC, Philadelphia, Pa. received notification cf this occurrence by telephone from the Plant Superintendent at 4:30 p.m. on March 14, 1976.
Contact:
FADreher., IE x27261 GWRoy, IE x27353 DThompson, IE x27541 Distribution:
Chairman Anders Commissioner Mason S. J. Chilk, SECY Commissioner Gilinsky Commissioner Rowden G. F. Murphy, JCAE Coimaissioner Kennedy C. C. Kammerer, CA
~~'#~7 L'. V. Gossick', EDO J. G. Davis, OIE J. A. Ha.rris, PA B. C. Rusche, NRR J. La Fleur, ISP T. J. McTiernan, AIA K. R. Chapman, NMSS H. K. Shapar, ELD H St k,
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....... - -.:. i PRELIMINARY NOTIFICATION - NOT FOR PUBLIC DISCLOSURE 9906220213 760315
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