ML20151U593

NPDES Noncompliance Notification:On 880725,measured Total Residual Oxident Exceeded 0.2 Mg/L Limit.Caused by Mechanical Failure of Oxident Feed Pump.Pump Repaired to Correct Check Valve Problem

ML20151U593
Person / Time
Site:	Quad Cities
Issue date:	07/27/1988
From:	Bax J COMMONWEALTH EDISON CO.
To:	ENVIRONMENTAL PROTECTION AGENCY, ILLINOIS, STATE OF
References
RLB-88-252, NUDOCS 8808190184
Download: ML20151U593 (2)

Text

_

. Dnd 5

Commonwealth Edison Quad Cities Nuclear Power Station 22710 206 Avenue North Corcova, Illinois 61242 Telephone 309/654-2241 FAIORITY ROUTING girst id J

y ha p$__

RLB-88-252 __lL CA"j + > %yt g -

L - f1LENA S -

July 27, 1988 Illinois Environmental Protection Agency Division of Water Pollution Control Compliance Management Unit 2200 Churchill Road Springfield, Illinois 62706 U.S. Environmental Protection Agency Region V, Enforcement Division Attention: Chief, Compliance Unit 230 South Dearborn Street Chicago, Illinois 60604

SUBJECT:

NPDES Non-Compliances for Quad-Cities Generating Station IL-0005037

Dear Sirs:

l In accordance with Standard Condition 12 we wish to submit l the following notice of non-compliances:

DISCIIARGE: 006 and 007 Open Cycle Diffusers PARAMETER AND PERMIT LIMIT: 'Jotal Residual Chlorine / Total Residu.1 Halogen Daily Max 0.2 mg/L NON-COMPLIANCE AND DATE: On 25JUL88, the measured total '

residual oxident exceeded the 0.2 mg/L limit. The maximum residual oxident measured at the river was 0.62 mg/L.

CAUSE: The cause of the problem has been attributed to a mechanical failure of the oxident f6ed pump. An trnal check valve in the pump failed 'na 11 owed the oxident to be injected at about three times the normal dosage, n of sa@ wf $

hgj8190184880727 bbb 3 ADOCK 05000254 PDC

t e- .s CORRECTIVE ACTION: The sodium hypochlorite tank was isolated' as soon as the increased flow was discovered. The maximum time at the increased flow was 3 1/2 hours or a loss of zul additional 1350 gallons of sodium hypochlorite.

The oxident' feed pump will.be repaired to correct the check valve problem.'.

After the pump has been repaired, the pump feed rate will be measured to ensure the correct oxident flow rate. ,

The system is shut down and will-not be operated until the check valve is repaired and:testad.

If there are any grestions, please call Ray Moore of my staff at 309-654-2'!41,- extension 2731.

Sincerely, R.

k L. Bax Station Manager Quad-Cities RLB/RM/psb cc: B. Davis, NRC Director of Water Quality, Environmental Affairs I

i

-__ _ _ _ _ _ _ - _ _ _ _ _ _ _ _