ML19207B091

LER 79-033/04T-0 on 790803:while Regenerating Makeup Water Mixed Bed Demineralizer,Caustic Solution Discharged.Caused by Operator Error.Affected Personnel Reinstructed & Definitive Procedures Promulgated

ML19207B091
Person / Time
Site:	Calvert Cliffs
Issue date:	08/16/1979
From:	Eherts R BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19207B089	List: ML19207B088 ML19207B091
References
LER-79-033-04T, LER-79-33-4T, NUDOCS 7908230366
Download: ML19207B091 (2)

Text

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"E 68 69 EVENT 0 ATE 74 75 REPORT O ATE 80 7 8 60 61 OOCKET NUVB E R EVENT DESCalPTioN AND PF,o8ABLE CONSEQUENCES h lo I211 Durina nomal ooeration while regeneratina a rakeuo water mixed bed demineralizer I o a 1 approximately 125 gallons of caustic solution (50 wtt) (6% dilution) neutralized I o 4 by 75 gallons of acid (99 wt%) (10% 6ilution) were discharced via outfall 001. 1 I

o s 1 The discharge occurred over a 180 minute time period at aporoximately 1.1. gom I o s I flow rate diluted by a discharce water flow of acoroximately 1.63E09 and. No I o 7 l environmental impact is considered due to the small amount of recenerant chemical I o s i actually discharged in relation to the dilution flow rate. (Continued) l

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_ SEOLENTI AL OCCURRENCE REPORT REVIslON LE R,RO EVENT YE AR REPORT NO. CODE TYPE N O.

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33 35 36 31 40 41 44 47 CAUSE DESCRIPTION AND CCRRECTIVE ACTloNS i o I Cause has been detemined to be inadvertent ooerator action. Imnediate corrective i i action involved reinstructing affected personnel in the procer operation of #11 Waste I

, , I Neutralizing Tank drain valve. Additional corrective action involved the promulaatiorj i 3 i of a definitive procedure to insure that #11 Waste Neutralizing tank drain valve I i is checked ir a proper manner :rior to initiation of a regeneration evolution. (CONT) ! -

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LER 79/33/4T EVENT DATE 08-03-79 REPORT DATE 08-16-79 DOCKET NO. 50-317 ATTACHMENT EVENT DESCRIPTION AND PROBABl.E CONSE0UENCES: (CONT)

(Note: The actual amount of regenerant chemical discharged is the total amount of regen. rant chemicals displaced minus the losses due to in situ neutralization).

Samples procurred immediately following this event confinn the aforementipned conclusion.

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CAUSE DESCRIPTION AND CORRECTIVE ACTION: (CONT)

The combined corrective action should minimize the possibility of a recurrence of this event.

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