Headquarters Daily Report

                         JUNE 18, 1996

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                    REPORT             NEGATIVE            NO INPUT
                    ATTACHED           INPUT RECEIVED      RECEIVED

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REGION III          û                                      
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PRIORITY ATTENTION REQUIRED  MORNING REPORT - REGION III  JUNE 18, 1996

Licensee/Facility:                     Notification:

Commonwealth Edison Co.                MR Number: 3-96-0065
La Salle 1 2                           Date: 06/17/96
Marseilles,Illinois                    via SRI                            
Dockets: 50-373,50-374
BWR/GE-5,BWR/GE-5                     

Subject: RADIOACTIVE WASTE SPILL                                         

Discussion:

On June 15, 1996, at about 12:10 p.m., a spill of approximately 3,600    
gallons of radioactively contaminated liquid and sludge occurred in the  
common unit 0WZ evaporator room. While processing radioactive liquid     
waste with the 0WZ evaporator, an operator noticed the feed flow to the  
evaporator had significantly increased and vapor body level had          
decreased. A radwaste operator and radiation protection technician that  
were dispatched to the area identified that water and sludge was flowing 
from underneath the evaporator pump room door which is located just      
outside of the evaporator room. The evaporator was isolated and the leak 
was stopped at approximately 1:25 pm. Dose rates inside the evaporator   
room were identified to be as high as 5 rem per hour, up from normal     
background levels of 0.05 rem per hour. Contamination levels in the      
adjacent hallway exceeded 1 million disintegrations per minute.          
                                                                         
The drain in the evaporator room was blocked by insulation that had      
fallen from the end cap due to the spill. This caused the water and      
sludge to spill over a 10 inch berm into the evaporator pump room and    
adjacent radwaste building hallways. The water has been removed from the 
hallways and pump room and only low contamination levels remain. The     
licensee indicated that there was no release of radioactive material to  
the environment, no personal contaminations, and no airborne             
contamination from this event. The licensee is in the process of         
developing a plan to decontaminate the evaporator room.                  
                                                                         
Due to the high dose rates, the licensee has yet to inspect the          
evaporator to identify the cause for the leak. However, the licensee     
believes that the most likely cause for the spill was the failure of the 
evaporator's end cap gasket. A similar event occurred in 1988 on the same
evaporator.                                                              
                                                                         
There are three evaporators used for processing liquid radwaste at the   
station. At the time of this event, the other two evaporators were not   
operable. Thus, the licensee is not able to process liquid radwaste at   
this time. The licensee anticipates returning the 2WF evaporator to      
service the afternoon of June 18, 1996.                                  

Regional Action:

Regional inspectors will be onsite on June 18, 1996, to review the       
licensee's initial investigation and plans.                              

Contact:  THOMAS KOZAK               (708)829-9866
          STEVEN ORTH                (708)829-9827
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