ML20214L594

NPDES Noncompliance Notification:On 870428 & 29,daily Max Total Residual Chlorine (TRC) Limitation Exceeded.Caused by Sodium Bisulfate Pump Failure During Chlorination.Personnel Counseled Re Correct TRC Limitation

ML20214L594
Person / Time
Site:	Point Beach
Issue date:	05/22/1987
From:	Fay C WISCONSIN ELECTRIC POWER CO.
To:	WISCONSIN, STATE OF
References
VPNPD-87-211, NUDOCS 8706010015
Download: ML20214L594 (3)

Text

Wisconsin Electnc eom coww 231 W MICHIGAN P O BOX 2046. MILWAUKEE.Wl53201 (414)221 2345 VPNPD-87-211 7 May 22, 1987 Department of Natural Resources State of Wisconsin WPDES Permit Section Post Office Box 7921 Madison, Wisconsin 53707 Gentlemen:

WPDES PERMIT WI0000957-3 POINT BEACH NUCLEAR PLANT on April 30, 1987, we notified the Department that the daily maximum total residual chlorine (TRC) limitation was exceeded at Point Beach Nuclear Plant. The TRC concentration in the Unit 2 cooling water discharge (sample point 002) was 0.31 mg/l on April 28 (not 0.37 mg/l as initially reported), and 0.47 mg/l on April 29, 1987. The following summarizes the results of our investigation into this incident.

On April 28, 1987, the operator started chlorination at 1330.

At 1458, the operator reduced the sodium bisulfite feed rate to try to determine the excess amount of sodium bisulfite being fed into the cooling water system. Up to this time, all twelve samples collected had TRC concentrations of less than 0.01 mg/1. Samples collected at 1500 and 1504 had TRC concentrations of 0.31 and 0.27 mg/1, respectively. At that time, the operator increased the sodium bisulfite feed rate, and the remaining five samples collected all had TRC concentrations of less than 0.01 mg/l (see the attached table).

The daily maximum limit was exceeded for less than ten minutes.

On April 29, 1987, the TRC limit was exceeded for less than seventeen minutes (see the attached table) when the sodium bisulfite pump failed during chlorination. A technician has been assigned to watch and adjust the sodium bisulfite feed pump during chlorination.

8706010015 870522 PDR g

ADOCK 05000304 PDR

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> Wisconsin DNR May 22, 1987 Page 2 All personnel involved with the chlorination / dechlorination system have been reminded of both the correct TRC limitation and the importance of the proper sodium bisulfite feed rate.

This is a temporary chlorination / dechlorination system that plant personnel are continuing to evaluate for optimal performance. We anticipate improving the dechlorination system so it can operate unattended, while continuing to meet our TRC limitations.

Very truly,yours, hiv C. W. Fy Vice President Nuclear Power Attachment l

Copies to Wisconsin DNR, Lake Michigan District U. S. Nuclear Regulatory Commission, Wash., D. C.

U. S. Nuclear Regulatory Commission, Region III f

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> POINT BEACH NUCLEAR PLANT CHLORINATION SAMPLE TIMES AND TOTAL RESIDUAL CHLORINE CONCENTRATIONS April 28, 1987 April 29, 1987 Time Conc (mg/1) Time Conc (mg/1) 1335 <0.01 1010 <0.01 1345 <0.01 1020 <0.01 l

1355 <0.01 1030 <0.01 f 1405 <0.01 1040 <0.01 j 1416 <0.01 1050 <0.01 1425 <0.01 1100 <0.01 1430 <0.01 1110 <0.01 1435 <0.01 1120 <0.01 1440 <0.01 1130 0.47 1445 <0.01 1135 0.33 1450 <0.01 1137 <0.01 1455 <0.01 1140 <0.01 1500 0.31 1150 <0.01 1504 0.27 1157 <0.01 1508 <0.01 1510 <0.01 j 1515 <0.01 l 1520 <0.01 1530 <0.01

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