Headquarters Daily Report

                         DECEMBER 13, 1996

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                    REPORT             NEGATIVE            NO INPUT
                    ATTACHED           INPUT RECEIVED      RECEIVED

HEADQUARTERS                                              û
REGION I                               û                   
REGION II           û                                      
REGION III                             û                   
REGION IV                              û                   
PRIORITY ATTENTION REQUIRED  MORNING REPORT - REGION II  DEC. 13, 1996

Licensee/Facility:                     Notification:

Duke Power Co.                         MR Number: 2-96-0121
Oconee 2                               Date: 12/13/96
Seneca,South Carolina                                                     
Dockets: 50-270
PWR/B&W-L-LP                          

Subject: VOID IN OCONEE UNIT 2 HOT LEG                                   

Discussion:

During a routine reduction in Unit 2 pressurizer nitrogen bubble pressure
on December 3, 1996, a small unexpected increase in pressurizer level was
noted.  Initial investigation into the problem indicated that there was a
void in the top of the B loop hot leg.  Following procedural changes, the
void (approx 2000 gallons) was eliminated by fill and vent activities on 
December 10 - 11.  There were no indications of voids in the A loop or   
the head.                                                                
                                                                         
The unit's Reactor Coolant System (RCS) had been drained to mid-loop for 
RTD maintenance in October.  Preliminary findings indicate that a vent   
valve was mispositioned during the subsequent RCS refill, resulting in an
inadequate fill and vent of the B loop.  The void would have precluded   
the use of the 2B Once-Through Steam Generator (OTSG) for decay heat     
removal (natural circulation), but did not affect the 2A OTSG or the Low 
Pressure Injection/Residual Heat Removal System.                         
                                                                         
Currently, Unit 2 remains in cold shutdown and the licensee's            
investigation is still underway.                                         

Regional Action:

The residents will continue to followup on this issue. A regional        
inspector has been dispatched to assist the residents in this effort.    

Contact:  R. CARROLL                 (404)331-5543
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