ML20091L218

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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  Constellation icon.png
Issue date: 08/28/1981
From: Russell L
BALTIMORE GAS & ELECTRIC CO.
To: Wigginton P
MARYLAND, STATE OF
Shared Package
ML20091K978 List:
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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