ML20248H818

PNO-78-101:on 780502,unplanned Radiation Exposure Occurred When Shift Supervisor Entered Rc During Refueling Outage to Look for Leakage W/O Carrying Survey Instrument Entry.On 760919,IE Circular 76-03 Sent to All Reactor Licensees

ML20248H818
Person / Time
Site:	Kewaunee
Issue date:	05/04/1978
From:	Liza Cunningham, Higginbotham L NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
IEC-76-03, IEC-76-3, PNO-78-101, NUDOCS 9806080260
Download: ML20248H818 (1)

Text

L hdMR /- \

y$D(Du (W  ! kY '

PRELIMINARY NOTIFICATION 3M

/.[...) v May 4,1978 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-78-101

_This preliminary notification constitutes EARLY notice of an event of

_POSSIBLE safety or public interest significance. The information presented is as initially received without verification or evaluation and is basically all that is known by IE staff on this date.

Facility: Wisconsin Public Service Corporation, Kewaunee (DN 50-305) Kewaunee, WI

Subject:

PERSONAL RADIATION EXPOSURE IN REACTOR CAVITY l

At 3:00 a.m. on May 2,1978, an unplanned radiation exposure occurred when a shift supervisor briefly entered the reactor cavity during a refueling outage to look for leakage from the refueling cavity. The individual did not carry a survey instrument during the entry, nor were adequate radiation surveys made beforehand. Initial evaluation by the licensee (based on the TLD worn by the individual) indicates a ,

dose of 2.8 rems. Radiation levels rates up to 2100 rems per' hour were sn measured in the cavity after the individual's exit. NRC inspectors are j currently investigating the circums,tances surrounding this event. t On September 19, 1976, IE Circular No. 76-03 was sent to all reactor -

licensees in an effort to prevent this type of incident (similar  ;

events were experienced at Point Beach, Zion, and Indian Point). t No press release has been made by the licensee nor Region III. The State of Wisconsin has been informed.

RIII (Chicago) inspectors were informed of the incident when they arrived onsite to conduct a routine inspection. The above reflects information as of 9:00 a.m. on May 4,1978.

Contact:

LJCunningham, IE x28188 LBHigginbotham, IE x28098 Distribution: Transmitted H St /lY Y '

tTiairman Hendrie Commission ~er Bradford Coranissioner Kennedy S. J. Chilk, SECY C. C. Kammerer, CA Commissioner Gilinsky (For Distribution)

Transmitted: MNBB fi4[ P Bldg /! V 2 E. Volgenau, IE L. V. Gossick, EDO E. G. Case, NRR S. H. Hanauer, EDO Region K d J. J. fouchard, PA SSBldghYf N. M. HA ler, MPA (MAIL)

C. V. Smith, NMSS T. J. McTiernan, 01A R. G. Ryan, OSP H. K. Shapar, ELD R. Minogue, SD PRELIMINARY NOTIFICATION b