ML20249B379
| ML20249B379 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 04/05/1976 |
| From: | Dreher F, Roy G, Thompson D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-76-063-01, PNO-76-63-1, NUDOCS 9806220381 | |
| Download: ML20249B379 (1) | |
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y hf, "Yhy 7, April 5, 1976 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -PNO-76-63
)
This prelirtinary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance.
The information presented is as initially received without verification or evaluation I
and is basically all that is known by OIE staff as of 2:20 p.m. on date of this notification.
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 i
WILL BE ISSUED IF WARRANTED.
Facility:
Peach Bottom 2 (DN 50-277)
Philadelphia Electric Company
Subject:
Residual Heat Removal (RHR) Heat Exchanger Leak While the reactor was in a scheduled refueling outage, on April 3, 1976, at approximately 5:00 a.m., a RHR heat exchanger leak occurred which released 6,000 gallons of reactor water to the plant effluent via the heat exchanger cooling water system over a six minute period.
Calcula-tions made by the licensee showed the total release to be 4.1 C1, mostly i
1131. The dilution water flow during the time of the release was 1,000,000 gal / min.
Subsequent hourly samples taken down stream showed only background activity.
The Technical Specification allowable release rate was exceeded for the six minute duration of the release. The release was 40% of the total Quarterly limit.
j Region I (Philadelphia) is investigating the cause of the hsat exchanger failure and the details of the release.
i l
Media interest is not expected. The State of Pennsylvania has been informed. A press release is not planned.
O Region I, NRC, Philadelphia, PA received notification of this occurrence
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by telephone from the Plant Superintendent at 3:45 p.m. April 3, 1976.
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The information is current as of 11:45 a.m., April 5, 1976.
0
Contact:
- FADreher, IE x27261
i Distribution:
2 Acting Chairman Rowden Commissioner Mason S. J. Chilk, SECY l
Commissioner Gilinsky C. C. Kannerer, CA G. F. Murphy, JCAE Commissioner Kennedy i
L. V. Cossick, EDO E. Volgenau, OIE J. A. Harris, PA B. C. Rusche, NRR J. La Fleur, ISP T. J. McTiernan, AIA l
K. R. Chapman, NMSS H. K. Shapar, ELD PBldg2,h 9 St 2. h ; MNBB 2. h ;
Luge S
Transmitted:
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PRELIMINARY NOTIFICAIl0N - NOT FOR PUBLIC DISCLOSURE
.a v.t 1 9906220381 760405 PDR IliE PNO-76-063 PDR V
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