ML20249B306

PNO-76-085:on 760510,auxiliary Bldg Evacuated as Precautionary Measure for Approx 1 H Due to Leakage of Rc Water from Rc Filter Drain Valve.Region 3 Radiation Protection Specialist Conducting Routine Insp

ML20249B306
Person / Time
Site:	Cook
Issue date:	05/11/1976
From:	Roy G, Thompson D, Warnick R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PNO-76-085, PNO-76-85, NUDOCS 9806220302
Download: ML20249B306 (1)

Text

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~'****-~-~~am..v..PRELIMINARY NOTIFICATION ..........,,. ,,

May 11, 1976 ' ' * ~ ' ~

PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-76-85 This preliminary notification constitutes EAPJ.Y notice of an event of l FOR IBLE safety or public interest significance. The information presentg is as initially received without verification or evaluation  !

j and is bacically all that is known by IE staff on this date.

3 Facility: American Electric Power Company (D. C. Cook 1)

Subj ect: EVACUATION OF AUXILIARY BUILDING DUE TO SMALL SPILL OF REACTOR COOLANT WATER '

The auxiliary building was evacuated as a precautionary measure for approximately one hour beginning at approximately 7:00 p.m.

on May 10, 1976, due to leakage of reactor coolant water from a reactor coolant filter drain valve. The cause of the leakage hac not been determined. ; Gross beta-g =ma activity levels in the building .

increased to approximately 7x10-8 microcuries per milliliter. No release limits appear to have been exceeded, and no personnel over-exposures are expected to have resulted. Reactor operation had been resumed May 10, 1976, following a maintenance outage which began April 12, 1976. Reactor operation was not affected by the occurrence.

A Region III (Chicago) radiation protection specialist who is conducting a routine inspection at the site is investigating the occurrence.

The occurrence received news media attention as a result of the r-evacuation of construction workers from the auxiliary building.

News releases are planned by both the licensee and the NRC.

Region III received notification of this occurrence by telephone g from the Plant Health Physicist at 9:00 a.m. May 11, 1976. .h

Contact:

RFWarnick, IE h27261 GWRoy, IE x27261 DThompson, IE x27541 Distribution:

l Chairman Rowden Commissioner Mason S. J. Chilk, SECY f . Commissioner Gilinsky C. C. Kammrver, CA G. F. Murphy, JCAE i Commissioner Kennedy L. V. Gossick, EDO E. Volgenau, OIE J. A. Harris, PA B. C. Rusche, NRR J. La Fleur, ISP T. J. McTiernan, AIA K. R. Chapman, NMSS H. K. Shapar, ELD Transmitted: P Bldg.1 A; H St 2.  ; MNBB g .; 1.tige

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PRELIMINARY NOTIFICAT10N

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9806220302 PDR IfnE 760511 '

!- PNO-76-095 PDR ..

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