ML20091L085
| ML20091L085 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 04/19/1989 |
| From: | Sears B BALTIMORE GAS & ELECTRIC CO. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20091K978 | List:
|
| References | |
| NUDOCS 9201270258 | |
| Download: ML20091L085 (2) | |
Text
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CHARLES CENTER e P.O. 80X 1475. BALTIMORE. MARYLAND 21203 April 19, 1989 une cues uman coma num www,n anos o.nes uman coen eum Luter, enAnvuwe soon Regional Administrator
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U.S. Nuclear Regulatory Commission C/5-Allendale Road K1ng of Prussia, Pennsylvania 19406 SUBJECT Electrical control Relay did not Energize the Operation of Wet Well Pumps, April 12, 1989 1
Dear Sirs /Hadames:
Attached you will' find a copy of-the letter to the State of Maryland descr.aing.a non-compliance electrical control relay event-at Calvert Cliffs Nuclear Power Plant which-occurred on April ~12, 1989.
We are required-by our NPDES pennit for Calvert Cliffs to report to.the State any
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non-compliance event.
If you ha.ve-any questions regarding '
'ched, please call me at.(301) 260-4905.
Sincerely,
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B.
Frank Sears Supervisor, Water Treatment Lcc:
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I CALTIMORE OASAND ELECTRIC CHARLES CENTER e P.O. BOX 1475. BAlilMORE, MARYLAND 21203 APYIl 19r 1989
. wwn currs.arasia eowin etawe evaeusut c=wnicuerswetaaneoniaetAur W99f,6tANYtAwD 8etti Mr. John Beazley Maryland Department _of Environment 2500 Broening Highway Baltimore, Maryland 21224
Dear Mr. Beazley:
This-letter _is to inform you of a non-compliance at Calvert Cliffs Nuclear Power Plant.
On April 12, 1983 at approximately.6:00 p.m. an electrical control relay did not energize which controls the operation of_the wet-well pumps via'an air compressor _and pressure bubbler-system.
These_ pumps lift raw sewage from a wet well to the sewage treatment plant, outfall point 101.
.The air bubbler system also act.vates the high level alarm on the-wet well,-so it also was inoperable.
Tho'wetLwell overflowed to a screen back wash channel where bay water returns to the bay at a rate of approximately 700 gpm.
It is estimated'that--12,000 to.14,000 gallons of sewage by passed the sewage treatment plant.
The problem was corrected ~at 8:00 a.m.,-
April 13, 1989.
No impact upon the receiving saters was observed or is expected.
Temporarily,'we have cross-connected to have other air compressors maintain. pressure for the bubbler control. system.
Our engineering department is currently designing a back.up control system to prevent recurrence of'this'non-compliance.
Mr.- Frank Ciurca was at the plant on April 13, 1989 for a-routine inspection.
Enclosed-is a copy of his report.
If you have any-questions r4garding this information, please H
feel _ free to call. me ak (301).260-4905.
Sincerely,
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B. Frank ars Supervisor, Water Treatmenc BFS:dag D
Enclosure s
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