ML20095A600

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NPDES Noncompliance Notification:On 920306,daily Max Total Residual Chlorine Effluent Limitation Exceeded.Caused by Malfunction of Chlorination Pump Stroke Adjustment Control. Maint Work Request Initiated to Repair Pump Control
ML20095A600
Person / Time
Site: Point Beach  NextEra Energy icon.png
Issue date: 04/13/1992
From: Zach J
WISCONSIN ELECTRIC POWER CO.
To:
WISCONSIN, STATE OF
References
VPNPD-92-150, NUDOCS 9204170171
Download: ML20095A600 (1)


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.c Wisconsin IN Electnc

. POWER COMPANY m w fAcNgort PO ika 2046 Mwee W 53201 M14} 22&7345 VPNPD-92-150 April 13, 1992 State of Wisconsin Department of Natural Resources WPDES Permit Section Post Office Box 7921 Nadison, Wisconsin 53707 Gentlemen:

WPDES PERMIT WI-0000957-4 P_QIliT. BEAC11 NUCLEAR PLANT On March 6, 1992,_ Wisconsin Electric notified the Department that the daily-maximum total residual chlorine (TRC) effluent limitation was exceeded at the Point Beach Nuclear Plant (PBNP).

~

The;TRC' concentration in the Unit 1-cooling water discharge (outfall 001) was 0.-71 mg/1-on March 4, 1992.

Cause of Incidqtt The limitation was caused by a malfunction of the chlorination

. pump stroke adjustment control which allowed the rate of sodium hypochlorite addition to increase in) the maximua pumping rate.

The amount of dechlorination chemical-was not sufficient to.

reduce the TRC below the permit limit of 0.2 mg/1.

Corrective Action Taken to Prevent Recurrence of Incident A maintenance work' request-was initiated to repair the pump stroke adjustment control. In the interim, the stroke _ adjustment control: has been tightly locked to _ hecp it from changing during pump operation. Also, a formal change is being made to PBNP's Chemical Analytical Methods.and1 Procedures-(" CAMP 009") to ensure ithat the.systen. operator verifies:that the adjustment-control is

-locked. The system has operated within permit limits since the l -March 4,_1992 TRC limitation exceedance.

Sincerely, h Lttud

.Jame :J.

L .Vice President I 4 l

Nuclear Power

\O Copies to: DNR Lake Michigan District

!- NRC< Document) Control Desk NRC Regional Administrator, Region III 9204170171'900413 gDR- ADOCK 0500 6 ,g 3

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