ML20072S375

NPDES Noncompliance Notification:On 940720,plant Intake Embayment Instrumentation Probe Found to Be Not Working. Caused by Saltwater Leakage & Subsequent Damage to Measuring Probe Internals.Equipment Replaced on 940722

ML20072S375
Person / Time
Site:	Calvert Cliffs
Issue date:	07/25/1994
From:	Cruse C BALTIMORE GAS & ELECTRIC CO.
To:	Reahl M MARYLAND, STATE OF
Shared Package
ML20072S364	List: ML20072S362 ML20072S375
References
NUDOCS 9409140059
Download: ML20072S375 (1)

Text

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e CsnAntes i1. Cnust Baltimore Gas ar.d Electnc Company Plant General Manager Calvert Cliffs Nuclear Power Plant 165o Calvert Clifs Parkway Calvert Clifs Nuclear Pouer Plant Lusby, Maryland 20657 410 586 2200 Ext. 4101 lxcal 410 260-4101 Baltimore July 25,1994 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 Conditions A.2. Noncompliance July 21,1994 NPDES Discharae Permit MD0002399A. State Permit 86-DP-0187A On July 20,1994 at 2:45 PM, 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 probe was found to be not functioning. During this time period there was no indication of noncompliance with any effluent limitations.

The measuring equipment was out of service for an undetermined amount of time but less than 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> before discovery. The cause of the equipment failure was saltwater leakage and subsequent damage to the measunng probe internals. This equipment was replaced with new equipment on July 22,1994. The installation of this new monitoring equipment should resc8ve our continuous monitoring problems. As a compensatory measure, oxygen, salinity and ;emperature measurements were taken on the plant intake embayment every four hours until the new continuous monitoring equipment was installed and returned to service.

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

Sincerely,

- / /

Q f

I CHC:JAS cc: J.F. Stine Nuclear Regulatory Commission 9409140059 940902 PDR S

ADUCK 05000317 PDR