Headquarters Daily Report

                         JULY 08, 1997

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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 - HEADQUARTERS JULY  8, 1997

MR Number: H-97-0083

                           NRR DAILY REPORT ITEM
                           GENERIC COMMUNICATIONS



NRC Information Notice 97-49, "B&W Once-Through Steam Generator Tube     
Inspection Findings," dated July 10, 1997.                               
                                                                         
The NRC is issuing this information notice to present the findings from  
the examination of tubes in Babcock and Wilcox once-through steam        
generators.                                                              
                                                                         
Technical contacts:  Kenneth J. Karwoski, NRR                            
                     301-415-2754                                        
                                                                         
                     Eric J. Benner, NRR                                 
                     301-415-1171                                        
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REGION II  MORNING REPORT     PAGE  2          JULY  8, 1997

Licensee/Facility:                     Notification:

Duke Power Co.                         MR Number: 2-97-0053
Oconee 2                               Date: 07/08/97
Seneca,South Carolina                                                     
Dockets: 50-270
PWR/B&W-L-LP                          

Subject: REACTOR/TURBINE TRIP DUE TO GRID DISTURBANCE - UPDATE           
Reportable Event Number: 32594                         

Discussion:

On July 6, 1997, at 6:52 a.m., Oconee Unit 2 experienced a reactor trip  
from 100 percent power.  The reactor trip was caused by a main generator 
backup lockout/turbine trip and a power-to-reactor coolant pump          
undervoltage reactor trip due to an overcurrent condition which was      
sensed on the Oconee 230 KV switchyard. The overcurrent condition was    
caused by the Jocassee switchyard creating the overcurrent condition when
two of its hydro units lost field excitation while pumping back from lake
Keowee to lake Jocassee. Oconee Units 1 and 3 remained at power.         
                                                                         
Subsequent investigation by the licensee revealed that due to a          
miscalibration, the Oconee Unit 2 voltage regulator had not responded as 
it should have to limit the Unit's response to the sudden increase in    
load (320 MW; 160 MW/Jocassee hydro unit). Unit 2 was restarted at 1:05  
a.m., on July 7 and, after calibrating the Unit's voltage regulator, it  
was tied to the grid at 11:11 p.m. The unit is currently being returned  
to full power operations.                                                

Regional Action:

Upon notification of the event, the senior resident inspector responded  
to the site.  The resident staff followed up on the licensee's event     
recovery activities and restart of the unit.                             

Contact:  R. CARROLL                 (404)562-4511
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