Headquarters Daily Report

                         JANUARY 22, 1996

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                    REPORT             NEGATIVE            NO INPUT
                    ATTACHED           INPUT RECEIVED      RECEIVED

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REGION IV           û                                      
PRIORITY ATTENTION REQUIRED  MORNING REPORT - HEADQUARTERS JANUARY 22, 1996

MR Number: H-96-0006

                           NRR DAILY REPORT ITEM
                           GENERIC COMMUNICATIONS



NRC Information Notice 96-06, "Design and Testing Deficiencies of Tornado
Dampers at Nuclear Power Plants," dated January 25, 1996.                
                                                                         
The NRC is issuing this information notice to alert addressees to the    
potential for inoperability of tornado dampers because of either         
inadequacies in damper testing or deficiencies in damper design.         
                                                                         
Contacts:  William T. LeFave, NRR                                        
           (301) 415-3285                                                
                                                                         
           Thomas Koshy, NRR                                             
           (301) 415-1176                                                
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REGION IV  MORNING REPORT     PAGE  2          JANUARY 22, 1996

Licensee/Facility:                     Notification:

Nebraska Public Power District         MR Number: 4-96-0012
Cooper 1                               Date: 01/22/96
Brownville,Nebraska                    Resident Inspector                 
Dockets: 50-298
BWR/GE-4                              

Subject: POTENTIAL TO PREVENT EMERGENCY DIESEL GENERATORS FROM FULFILLING
         THEIR SAFETY FUNCTIONS                                          

Reportable Event Number: 29855                         

Discussion:

On January 18, 1996, the licensee made a 4-hour event notification in    
which they described an existing condition which could have resulted in  
the muffler bypass valves from opening and possibly preventing the diesel
generators from performing their safety functions. On January 15, 1996,  
during surveillance testing of Diesel Generator (DG) 2, the muffler      
bypass valve failed to operate.  During troubleshooting on January 17,   
1996, the licensee found that 1/4-inch diameter tubing to the            
solenoid-operated pilot valve exhaust port restricted air flow,          
preventing the muffler bypass valve from opening. Further investigation  
revealed that this same 1/4-inch diameter tubing had been installed on   
DG 1.  As immediate corrective action, the licensee has removed the      
1/4-inch diameter tubing from both DGs.                                  
                                                                         
Preliminary investigation into this event found that the 1/4-inch        
diameter tubing was added during the last refueling outage as part of    
installation of a major design modification.  However the tubing, which  
apparently been added to address a foreign material exclusion concern,   
was installed without proper drawings or engineering evaluation.         

Regional Action:

The resident inspectors are following up on the licensee's corrective    
actions and root cause analysis.                                         

Contact:  Rebecca Nease              (817)860-8154
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