Headquarters Daily Report

                         NOVEMBER 06, 1998

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                    REPORT             NEGATIVE            NO INPUT
                    ATTACHED           INPUT RECEIVED      RECEIVED

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REGION IV           û                                      
PRIORITY ATTENTION REQUIRED  MORNING REPORT - REGION IV  NOV. 06, 1998

Licensee/Facility:                     Notification:

Nebraska Public Power District         MR Number: 4-98-0061
Cooper 1                               Date: 11/06/98
Brownville,Nebraska                    From the RIs                       
Dockets: 50-298
BWR/GE-4                              

Subject: COOPER NUCLEAR STATION REFUELING OUTAGE UPDATE                  

Discussion:

Since the start of the current refueling outage on October 2, Cooper has 
experienced a number of equipment problems.  These included improper     
installation of a reactor protection system (RPS) power supply that      
resulted in failure of the RPS Subchannel A2 scram discharge volume high 
level trip to actuate in response to a high level (Channels A1, B1, and  
B2 functioned properly); and small amounts of coal tar lining that flaked
off from the interior of service water piping.  In addition, engineers   
discovered fused disconnects on the 125 Vdc battery buses with           
insufficient rated current interruption capacity (although subsequent    
testing demonstrated that the fuses would have performed their intended  
function) and an emergency diesel generator output breaker that closed   
unexpectedly when racked in, resulting in motoring the diesel for a few  
seconds (inspections revealed no damage to the generator).  Also, workers
simultaneously opened two shutdown cooling drain valves at different     
elevations, causing much more water than expected (greater than 500      
gallons total) to drain into the northwest quadrant room of the reactor  
building.  As a result, the residual heat removal pump motors were       
sprayed down, necessitating corrective action to ensure that no damage   
occurred.  The licensee has pursued and implemented corrective actions   
for each of these problems.                                              
                                                                         
As of 7 a.m. on November 6, the licensee anticipated restart from the    
outage on November 21.                                                   

Regional Action:

The Resident Inspectors continue to monitor the effectiveness of the     
corrective actions.                                                      

Contact:  Charles S. Marschall       (817)860-8185
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