View source for PNO-III-87-084A, on 870618,approx 235 Gallons of Unit 1 Water Discharged Into Lake Michigan Through Unit 2 Svc Water Discharge.Caused by Presence of Entrained Noble Gases. Calculations Verified by Resident Inspectors

{{Adams
| number = ML20216C175
| issue date = 06/24/1987
| title = PNO-III-87-084A:on 870618,approx 235 Gallons of Unit 1 Water Discharged Into Lake Michigan Through Unit 2 Svc Water Discharge.Caused by Presence of Entrained Noble Gases. Calculations Verified by Resident Inspectors
| author name = Defayette R, Hague R
| author affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION III)
| addressee name = 
| addressee affiliation = 
| docket = 05000266, 05000301
| license number = 
| contact person = 
| document report number = PNO-III-87-084A, PNO-III-87-84A, NUDOCS 8706300232
| document type = PRELIMINARY NOTIFICATION OF EVENT OR OCCURRENCE (PNO,, TEXT-INSPECTION &amp; AUDIT &amp; I&amp;E CIRCULARS
| page count = 1
}}
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PRELIMINARY NOTIFICATION OF EVENT OR: UNUSUAL OCCURRENCE--PHO-III-87-84A Date: June 24, 1987 l
'This preliminary notification corstitutes EARLY notice of events of POSSIBLE safety or public
' inter st significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region Ill staff on this date.
; Facility: Wisconsin Electric Power Company        Licensee Emergency Classification:
Point Beach Units 1 & 2                     Notification of an Unusual Event Two Rivers, WI   54241                      Alert Site Area Emergency Docket No. 50-266; 50-301                   General Emergency
_X_Not Applicable

==Subject:==
RELEASE OF PRIMARY COOLING WATER INTO LAKE MICHIGAN (UPDATE)
:On June 18, 1987, approximately 235 gallons of Unit I reactor cooling water was discharged          j into Lake Michigan through the Unit 2 service water discharge. Preliminary indications were        l that the release exceeded the Technical Specification discharge limit.                              1 After analyzing the actual activity of- the primary cooling water that was discharged during this event, the licensee determined that the cause of the alarm on the service water dischargemonitorwasduetothepresenceofentrainednobggases. The alarm setpoint is basedonthemaximumpermissibleconcentration(MPC)obOCo in the effluent path. The analysis of the actual water discharged indicates a Co equivalent activity of less than 3%          '
MPC. The activity of the noble gases entrained in the discharged water was several magnitudes higher than the liquid activity. Using the applicable formula for the noble gas           '
release it was calculated that an individual in the vicinity of the discharge pier would have received a whole body exposure of .06 mrem. This is 3% of the hourly exposure limit for an unrestricted-area.
The licensee's calculations were verified by the resident inspectors and the licensee's            '
analysis results will be confirmed by the use of split samples sent to Region III for independent verification.
The State of Wisconsin will be notified.
There has been local news media interest in this event.
This information is current as of 11:00 a.m. (CDT), June 24, 1987.
CONTACT:   R. DeFayette                   R.L. Hague 312/790-5767                   414/755-2309 DISTRIBUTION:
H. St.               EDO           NRR       E/W       Willste       Mail: ADM:DMB Chairman Zech        PA                      IE        NMSS              D0T:Trans only Comm. Roberts        ELD                     OIA       RES Comm. Asselstine                             AEOD      NRC Ops Ctr Comm. Bernthal Comm. Carr           SP                 Regional Offices ACRS SECY           INP0                     NSAC CA                   RIII Resident Office Licensee:             (Corp. Office - Reactor Lic. Only)
Region III Rev. November 1986 g63       32 870624r PNO-III-07-084 PDR                                                                 N p,1-}}

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