ML20249B090
| ML20249B090 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 02/12/1976 |
| From: | Dreher F, Roy G, Thornburg H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I), NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-76-025, PNO-76-25, NUDOCS 9806220058 | |
| Download: ML20249B090 (1) | |
Text
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PRELIMINARY h IFICATION OF EVENT OR UNUSITAL OCCURR
--PNO-76-25 This preliminary notification constitutes EARLY notice of events of 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 notification.
NOTIFICATION MAY CONTAIN INFORMATION THAT BE INACCURATE OR INCONSISTENT.
AN OFFICE OF INSPECTION AND ENFORCEMENT
_ NOTIFICATION OF AN INCIDENT OR OCCURRENCE (BLUE WILL BE ISSUED IF WARRANTED.
Facility:
Millstone Point 1 and 2 (DNs 50-245 and 50-336)
Subjects UNPLANNED RELEASE AND GROUND LEVEL CONTAMINATION i
Our Region 1 Office, was informed by telephone that Millstone 1, operating at 100% power, tripped off line because of a problem in their output transformer.
Apparently, the power surge caused unit 2 to trip.
Unit 2 was operating at 80% power. There are no problems associated with unit 2.
4 Following the unit i scram, the main steam isolation valves closed and the isolation condensor actuated in accordance with design.
that a tube in the isolation condenser failed and radioactive water It appears entered the shell side of the condenser and exited through the isola-tion condensor vent.
The mixture of radioactive water and steam from
- the isolation condenser.vant has contaminated outside areas adjacent to the reactor building. The extent of the contamination has not as yet.been determined but is not considered to be significant from the public safety viewpoint.
'and the isolation condensor system isolated.Apparently the problem was dete The licensee initiated the Unit I Emergency procedure to control the-spread of contamination.
The Region I, office has dispatched a Health Physicist and an
. Environmentalist to the site.
News Media are aware of the event.
(
i J
The States of Connecticut and Rhode Island have been informed.
p release is being prepared for possible use.
A press f
Region I, Philadelphia received notification of this occurrence by q
telephone from licensee at 2:18 p.m. 2/12/76.
d
Contact:
FADreher, IE x27261 GWroy, IE x 27353 HDThornburg, IE x27353 Distribution:
Chairman Anders
)
Commissioner Mason S. J. Chilk, SECT Commissioner Gilinsky Commissioner Rowden G. P. Murphy, JCAE Commissioner Kennedy C. C. Kamerer, CA
.L. V. Gossick,
- 3. C. Rusche, NRR-J. G. Davis, OIE J. A. Harris, PA E. R. Chapman,'NMSS J. La Fleur, ISP T. J. McTiernan, AIA H. K. Shapar ELD Transmitted:- P Blde u c at 3 b., --- g" a
g 58 760212 pr PND-76-025 POR
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