ML20105B886

Revised Units Shutdowns & Power Reductions Sheet for May 1992 Monthly Operating Rept for SONGS Unit 3

ML20105B886
Person / Time
Site:	San Onofre
Issue date:	05/31/1992
From:	Darling J SOUTHERN CALIFORNIA EDISON CO.
To:
Shared Package
ML20105B707	List: ML20105B705 ML20105B876 ML20105B883 ML20105B886 ML20105B895
References
NUDOCS 9209210266
Download: ML20105B886 (1)

Text

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UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET 940: 50-362 I UNIT EtAME: SONGS - 3  !

' May 1992 9-15-92 -

REPORT MON 1H: DATE: . i C)MPLETED BY: 1. L. Darling i TELEPHONE: (714) 368-6223 [

Method o' Shutting Cause & Corrective Duration Down LER System Ccmpenent Action to l No. Date Type * (Hours) Reason 2 Reactor3 No. Code' Code' Prevent Recurrence i c

65- 920419

• F 108.98 A 1 NA AS BAF Continued from previous month's outage.  ;

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S 120.62 B 1 NA TA TRB Resumed turbine balancing from

, previous month. l I '66

• 920515 F 101.60 A 3 3-92-003 AB CAP See note below. [

Note: On May 15, at 1006, with Unit 3 at 100% reactor power, RCP P003 tripped on neutral ground overcurrent. This }

4 caused a reactor trip signal to be generated. A short circuit failure of the RCP P003 motor phsse "C" surge  !

protection capacitor occurs ad due to long term vibration-induced abrasion damage to the mylar plastic insulation within the capacitor assembly. The surge capacitors for all four Unit 3 RCPs were replaced with l in-kind parts and the surge capacitors for the Unit 2 RCPs will be replaced during the next outage of sufficient duration. The RCP motor preventative maintenance program will be modified to include an '

i appropriate periodic examination, including testing, of the surge capacitors. Periodic replacement of the L capacitors will be required as appropriate. ,

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' Data corrected since previous submittal.

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2 2 3 j F-Forced Reason: Method: 'IEEE Std 805-1984 l 3 5-Scheduled A-Equipment Failure (Explain) 1-Manual l j.

B-Maintenance or Test 2-Manual Scrac. 'IEEE Std 8034-1983 l C-Refueling 3-Automatic Scram.

D-Regulatory Restriction 4-Continuation from

! E-Operator Training & License Examination Previaus Month  ;

F-Administrative 5-Reduction in the Average '

G-Operational Error (Explain) Daily Power Level of more H-Other (Explain) than 20t from the previous day  ;

3 6-Other (Explain) j mor.aug/18 9209210266 920915 PDR ADOCK EP:Ropyyt ._ _