ML20072S360

NPDES Noncompliance Notification:On 940601,plant Intake Embayment Instrumentation Oxygen Probe & Data Recorder Found Not to Be Working.Caused by Corroded Internal Connectors & Replacement Tape Cassette Failure,Respectively

ML20072S360
Person / Time
Site:	Calvert Cliffs
Issue date:	06/07/1994
From:	Cruse C BALTIMORE GAS & ELECTRIC CO.
To:	Reahl M MARYLAND, STATE OF
Shared Package
ML20072S350	List: ML20072S348 ML20072S360
References
NUDOCS 9409140050
Download: ML20072S360 (1)

Text

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,9 CnAntts i1. CnusE Baltimore Gas and Electric Company

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. Plant General Manager Calvert Clifp Nuclear Pon er Plant Calvert Cliffs Nuclear Pmer Plant 1650 Cairert Clifs Parovay Lusbv. Maryland 20657 410 586-2200 Ext. 4101 Local

.sto 260-4101 Baltimore June 7,1994 Michael Reahl State of MD - Department of the Environment Water Management Administration 2400 Broening Highway Baltimore, Maryland 21224

Dear Mr. Reahl:

RE: NPDES Permit Special Condition Discharge Point 001B A3 Noncompliance June 1,1994 NPDES Discharoe Permit MD0002399A. State Permit 86-OP-0187A 1

On June 1,1994 at 10:45 AM, during a routine surveillance of the continuous monitoring equipment required by the Calvert Cliffs Nuclear Power Plant site NPDES permit, the plant intake embayment ,

instrumentation oxygen probe and data recorder were found to be not working. During this time period {

there was no indication of a noncompliance with effluent limitations.

The Oxygen measuring equipment and data recorder were out of service for an undetermined amount of l

time but less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> before discovery. The data recorder was repaired by 11:45 AM on June 1,  !

1994. The recorder ceased functioning due to a replacement tape cassette failure. The cause of the  ;

oxygen equipment failure was corroded intemal connectors at the sample probe. While the oxygen probe failure was being diagnosed and fixed, the continuous salinity and temperature measurements were also not taken because the probe performs all three measurements. The continuous sampling equipment was restored to service at 02:15 PM on June 4,1994 As a compensatory measure, oxygen,  ;

salinity and temperature measurements were taken on the plant intake embayment every four hours until the continuous monitoring equipment was returned to service. Your department was informed about this matter at 4:10 PM on June 1,1994.

If you have any questions regarding this information, please contact James Szymkowiak at (410) 260-4020.

Sincerely, CHC:JAS s

cc: P.G. Chabot J.F. Stine R.A. Kreger Nuclear Regulatory Commission 9409140050 940902 PDR ADOCK 05000317 S PDR