ML20249B191
| ML20249B191 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay |
| Issue date: | 03/18/1976 |
| From: | Roy G, Thompson D, Warnick R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-76-045, PNO-76-45, NUDOCS 9806220153 | |
| Download: ML20249B191 (1) | |
Text
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. March 18, 1976 PRELIMINARY NOTIFICATION OF EVE!
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--PNO-76-45 W
This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance.
The information presented in as initially received without verification or evaluation
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and is basically all that is knoun by OIE staff as of 4:00 p.m. on date of this notification.
IT S!!OULD BE SPECIFICALLY HOTED THAT THIS NOTIFICATION MAY CONTAIN INFOPJIAT]ON THAT LATER MAY BE DATERMINED TO BE INACCURATE OR' INCO: SISTENT. AN OFFICE OF INSPECTION AND ENFORCEMENT NOTIFICATION OF AN IUCIDENT OR OCCURRENCE (BLUE SHEET) SUBSEQUENTLY WILL BE ISSUED IF WARRAUTED.
Facility:
Pacific Gas & Electric Company Humboldt Bay Unit No. 3
Subject:
Crack in 2-Inch Diameter Suction Piping of Reactor Cleanup System A circumferential crack, approximately one inch in length, was found in the heat affected zone of a socket veld in the 2 inch diameter stainless steel suction piping of the reactor cicanup system. The reactor was shutdown at 0150 3/17/76 due to an abnormal increase in coolant leakage which had risen to 11.8 GPH. An inspection of piping inside the drywell during a subsequent hydrostatic test of the reactor coolant system disclosed the crack at approximately 7:00 pm on 3/17/76. A " soft patch" was applied to secure the leakage, which is unisolable from the reactor j
coolant system. An investigation of the problem and possible means of repair is underway by licensee personnel.
The technical specification limit for primary coolant Icakage is 1 gpm (60 gallons per hour).
A Region V inspector has been dispatched to the site.
It is expected that the Humboldt Plant will remain shutdown at least a week. The licensee and Region V are planning to issue press releases.
Hedia interest is expected in California because of awareness generated
/
j by the nuclear moratorium referendum.
Region V (Walnut Creek,.CA) received notification of this occurrence by telephon'e from the Plant Superintendent at 9:00 a.m. on March 18, f
1976.
Contact:
RFWarnick, IE x27261
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Distribution:
Chairman Anders Commissioner Mason S. J. Chilk, SECY Commissioner Gilinsky Commissioner Rowden G. F. Murphy, JCAE l
Commissioner Kennedy C. C. Kammerer, CA i
L. V. Gossick, J. C. Davis, OIE J. A. Harris, PA 1
B. C. Rusche, NRR J. La Fleur, ISP T. J. McTiernc7, AIA K. R. Chapman, NMSS H. K. Shapar, ELD l
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j2 PRELIMINARY NOTIFICATION - NOT FOR PUBLIC DISCLOSURE l
17 990&t20153 760318 PDR ISE PNO-76-045 PDR
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