ML20091L218

NPDES Noncompliance Notification:On 810810,operator Discovered Leakage Past Drain Valve for 12 Waste Neutralization Tank (Wnt).Caused by Damaged Seat of Wnt Drain Valve.Valve Replaced

ML20091L218
Person / Time
Site:	Calvert Cliffs
Issue date:	08/28/1981
From:	Russell L BALTIMORE GAS & ELECTRIC CO.
To:	Wigginton P MARYLAND, STATE OF
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 9201270320
Download: ML20091L218 (1)

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B ALTIMORE G AS AND ELECTRIC COMP ANY P.O. D OX 1475 D A LTIM O R E. M A R YL A N D 212o 3 HUCLE AR POWER DEPARTMENT c ALVERT CLIFF 4 NUCLE AR POWER PL ANT LU5RY. MARYLAND 2D457 Auguct 28, 1981 Division of Severage Inspection and Compliance Progran Office of Environmental Prograns 201 West Preston Street Baltimore, Maryland 21201

• Attention: Mr. Peter Wigginton

Dear _ Mr. Wigginton:

Per our State Discharge Pemit No. 'Ik-DP-0187A and NPDES No. MD0002399, please find the follow-up information on an inadvertant discharge in non-compliance with our discharge permit. The noncompliance was reported to Ms. Debby Ford of your office on August 2h ,1981.

At 1330 on 8-10-B1 during normal operation, the outside operator &iscovered a leakage past a drain valve for #12 Waste Neutralization Tank (WNT). The leakage was estimated at one (1) Epm. Attempts to seat the valve failed.

The #12 kTT level was five feet and the pH vas tested at 1.8. The liquid was neutralized with dilute Sodium Rrdroxide (5%) at 1515 and discharged in accordance with permit regulations. The regeneration vaste leakage was _

4 discharged to the bay via the WNT drain valve without enauring compliance.

The kHT drain valve was removed and inspected on 8-11-81. The cause of the noncompliance was round to be a damaged sent of the WNT drain valve. _ The -(

immediate problem was corrected by replacing the valve with a duplicate of the original. The suitability of the specified WNT drain valve is being investigated for possible revision.

The estimated 105 gallons of vastewater over a period of about 105 minutes was introduced to circulation water of 105,000,000 gallone. Following the discharge into the Chesapeake Bay , the pH vould have increased very rapidly to within the ambient range of the bey as a result of rapid mixing and dilution. Thus , there was no measurable impac. on the environment resulting from this discharge.

If you need additienal information, please contar me.

1 V / truly yours ,

, g L. B. Russell Plant Superintendent 9201270320 920116

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