Headquarters Daily report

                         JUNE 13, 1994

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                    REPORT             NEGATIVE            NO INPUT
                    ATTACHED           INPUT RECEIVED      RECEIVED
HEADQUARTERS                           X                   
REGION I                               X                   
REGION II                              X                   
REGION III                             X                   
REGION IV           X                                      
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PRIORITY ATTENTION REQUIRED  MORNING REPORT - REGION IV  JUNE 13, 1994

Licensee/Facility:                     Notification:

Entergy Operations, Inc.               MR Number: 4-94-0053
Waterford 3                            Date: 06/13/94
Killona,Louisiana                      SRI                                
Dockets: 50-382
PWR/CE                                

Subject: INADVERTENT REACTOR CUTBACK                                     
                                                                         
Reportable Event Number: N/A

Discussion:

On June 12, 1994, at 11 a.m., while operating at full power, the         
Waterford-3 plant experienced a reactor cutback due to a turbine trip.   
(The reactor cutback automatically inserts preselected control element   
assembly Subgroups 5 and 11 into the core.) The turbine trip occurred    
when a moisture separator reheater (MSR) high water level was received.  
The plant was stabilized at approximately 20 percent power utilizing the 
steam bypass system.  All reactor cutback functions occurred as designed 
and no abnormal cutback system responses were observed by the licensee.  
The operators maintained the plant at that power level while             
troubleshooting efforts commenced to determine the cause of the problem. 
Plant management convened an Event Review Team (ERT) to perform a root   
cause analysis prior to returning the plant to full power.               
                                                                         
The ERT initial results indicated that one of three level indicators on  
an MSR sensed a high level and its mercury switch stuck in the high level
position.  While operators were evaluating the resultant annunciator, a  
second high level on that MSR was received and completed the coincidence 
needed for a turbine trip.                                               
                                                                         
The ERT determined that the root cause of the event was equipment        
malfunction due to lack of insulation on the common high point sensing   
line for the instruments.  The lack of insulation apparently allowed     
steam condensation in the line when heavy thunderstorm activity in the   
area caused a sudden drop in temperature.  Additionally, the ERT reported
that thunderstorm-induced vibrations resulted in the level switch        
actuation.                                                               
                                                                         
The licensee is evaluating the adequacy of present piping supports to    
prevent inadvertent actuation of the MSR level switches due to vibration 
and that all level switches are free to actuate and reset.               
                                                                         
As of 8 a.m., on June 13 the plant was at 30 percent power while holding 
for condenser chemistry to come into specification. The licensee intends 
to return to full power operations upon satisfying chemistry             
requirements.                                                            

Regional Action:

The SRI was onsite at the time of the event and responded to the control 
room to observe activities and evaluate the event.  Regional management  
was telephonically informed of the plant status.                         

Contact:  Chris Vandenburgh          (817)860-8161