Headquarters Daily Report

                         MAY 27, 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 - REGION III  MAY 27, 1997

Licensee/Facility:                     Notification:

Iowa Electric Light & Power Co.        MR Number: 3-97-0072
Duane Arnold 1                         Date: 05/27/97
Palo,Iowa                              SRI PC                             
Dockets: 50-331
BWR/GE-4                              

Subject: MAINTENANCE OUTAGE TO REPAIR MSIV INDICATION                    

Discussion:

On May 23, 1997, at 10:24 a.m. (CDT), the licensee commenced a reactor   
shutdown to repair a dual indication condition on the "C" inboard MSIV.  
Other maintenance items planned for the short duration outage included   
replacing the "B" IRM and replacing the drywell airlock test connection  
valves. Operators tripped the main turbine at 11:42 p.m. (CDT) on May 23,
1997, and inserted a manual scram at 00:51 a.m. (CDT midnight) on May 24.
In addition to the planned repairs, the licensee completed work on two   
emergent items: a dual indication condition on a torus to drywell vacuum 
breaker and a leaking decontamination flange on the "A" recirculation    
discharge loop. The licensee commenced a reactor startup at 5:00 p.m.    
(CDT) on May 26, 1997. The reactor was made critical at 8:34 p.m. (CDT)  
on May 26, 1997. Startup activities are currently in progress.           

Regional Action:

The resident inspectors monitored the plant shutdown, repair and outage  
activities, and the plant startup.                                       

Contact:  M. JORDAN                  (630)829-9637
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REGION IV  MORNING REPORT     PAGE  2          MAY 27, 1997

Licensee/Facility:                     Notification:

Arizona Public Service Co.             MR Number: 4-97-0045
Palo Verde 1                           Date: 05/27/97
Wintersburg,Arizona                    Telephone Call from SRI            
Dockets: 50-528
PWR/CE80                              

Subject: UNIT 1 REACTOR TRIP  (REFER TO EVENT 32393)                     

Discussion:

At approximately 12:34 a.m. (MST) on May 27, 1997, the Unit 1 reactor    
tripped on low DNBR resulting from the loss of two of the four reactor   
coolant pumps.  Approximately 30 minutes prior to the trip, the voltage  
indication on nonsafety-related 13.8 KV bus NAN-SO1 began to decrease,   
although the actual bus voltage remained steady at the required value. At
about 10.1 KV indicated voltage, the two reactor coolant pumps powered by
the bus tripped as a result of the indicated undervoltage, resulting in a
reactor trip on low DNBR.  All systems responded as required.  No safety 
equipment was called upon to operate.  The unit is stable in Mode 3.  The
licensee believes that the potential transformer supplying the bus       
voltage indication malfunctioned because the bus never lost voltage.  The
licensee is working to establish the root cause.  The Senior Resident    
Inspector responded to the site to verify the licensee's actions.        

Regional Action:

The resident inspection staff will verify the root cause and assess      
readiness for restart.                                                   

Contact:  D. Kirsch                  (510)975-0290
          K. Johnston                (602)386-3638
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