ML20024A193
| ML20024A193 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 06/04/1982 |
| From: | Jaffe D Office of Nuclear Reactor Regulation |
| To: | Carter J, Harold Denton, Eisenhut D NRC |
| Shared Package | |
| ML20023A453 | List: |
| References | |
| FOIA-83-168 NUDOCS 8306160083 | |
| Download: ML20024A193 (1) | |
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MEMORAf4DUM FOR:
H. Denton 0
J. Carter.
D. Eisenhut R. Purple DL Assistant Directors c
S. Hanauer R. Vollmer R. Mattson H. Thompson J. Sniezek T. Ippolito C. J. Heltemes, AE0D T. Capucci, ACRS THRU:
Robert A. Clark, Chief fh k Operating Reactors Branch y3, Dt' FROM:
David H. Jaffe, Project Manager Operating Reactors Branch #3, DL l
SUBJECT:
DAILY HI.GHLIGHT..,
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CALVERT CLIFFS Diesel Gen ~e'rator Failures-1.
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An incident occurred on June 3, 1982 which iesulted in.the loss of all
-(three) diesel generators at Calvert Cliffs. With.Calvert Cliffs Unit 1 in a refueling outage, Diesel Generator #11 (Unit 1) was removed from service for maintenance.
In preparation for performing maintenance on a service transformer, the remaining diesel generators (f12 (swing) and
- 21 (Unit 2)) were tested.
At approximately 5:30 AM, diesel generators
- 12 and #21 were shown to be operable. At approximately 6:30 AM #21 diesel generator tripped and #12 diesel generator was started.
At approximately 7:00 AM #12 diesel generator tripped and thus all diesel generators were temporarily inoperable.
Calvert Cliffs Unit 2 was operating during this time.
At approximately 8:00 AM, diesel generators.
s.12 and #21 were declared operable.
The cause of the incident was related to the paralleling of the diesel generators with buses that were being powered from an off-site source.
The licensee is investigating this incident
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David.H. Jaffe, ject Manager Operating ifeactors Branch #3 Division of Licensing t o-31]
8306160083 830419 PDR FOIA DELL 83-168 PDR
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