ML20091L085

NPDES Noncompliance Notification:On 890412,electrical Control Relay Did Not Energize Which Controls Operation of Wet Well Pumps Via Air Compressor & Pressure Bubbler Sys. Engineering Dept Designing Back Up Control Sys

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: ML20091K975 ML20091L030 ML20091L034 ML20091L051 ML20091L061 ML20091L072 ML20091L085 ML20091L102 ML20091L111 ML20091L131 ML20091L142 ML20091L147 ML20091L153 ML20091L158 ML20091L170 ML20091L176 ML20091L188 ML20091L196 ML20091L211 ML20091L218 ML20091L221 ML20091L228 ML20091L229 ML20091L251 ML20091L264 ML20091L277 ML20091L287 ML20091L293 ML20091L300
References
NUDOCS 9201270258
Download: ML20091L085 (2)

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o .= l k3ALTIMORE 1 OAs AND ELECTRIC ]

I CHARLES CENTER e P.O. 80X 1475 . BALTIMORE. MARYLAND 21203 une cues uman coma num www,n April 19, 1989 anos o.nes uman coen eum Luter, enAnvuwe soon Regional Administrator -i

-Region I l

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 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: Document-~ Control Desk y -V. L.-Pritchett 1

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CALTIMORE OASAND ELECTRIC CHARLES CENTER e P.O. BOX 1475 . BAlilMORE, MARYLAND 21203

. wwn currs .arasia eowin etawe evaeusut APYIl 19r 1989 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,

=rd

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B. Frank ars Supervisor, Water Treatmenc BFS:dag D Enclosure s

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