PNO-IV-89-051A, on 890814,radioactive Contamination Found Outside Radiation Controlled Area in Stairwell of Mechanical Auxiliary Bldg & on 890817,contamination Found in 11A Mab Chiller Open Cooling Sys Discharge Drain.Events Unrelated

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• PNO-IV-89-051, radioactive Contamination Outside Radiation Controlled Area Discovered.Apparent Cause Associated W/Operation of Radwaste Evaporator.No Contamination Found in Neutralization Basin & No Personnel Contaminated