ML20136B889

Revised Monthly Operating Rept for Jul 1985

ML20136B889
Person / Time
Site:	Byron
Issue date:	07/31/1985
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20136B874	List: ML20136B871 ML20136B883 ML20136B889 ML20136B902
References
(0625M), (625M), NUDOCS 8511200310
Download: ML20136B889 (1)

Text

_ _ _ _

cPla:c's ins':rt this table in the July 1985 r port R; port Period July 1985 UNIT SHUTDOWNS / REDUCTIONS

• BYRON

• No. Date Type Hours Reason Method LER Number System Component Cause & Corrective Action to Prevent Recurrence

20) 7/1/85 S 171.8 A 4 Continued scheduled outage from 6/27/85.

21) 7/8/85 F 17.7 A 2 A manual . turbine trip was initiated at 8*4 Reactor Power due to misalignment of control rod P-8. A reactor trip resulted.

22) 7/12/85 F 13.4 B 3 The reactor tripped during performance of the 50% load rejection test.

23) 7/13/85 P 239.7 A 3 The reactor tripped due to high negative flux rate which was caused by lightning.

24) 7/27/85 S 100.0 B 2 100% Reactor Trip Startup Test.

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• Summary

• Byron 1 is continuing in its 100% Power Test Sequence.

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TYPE Reason Method System & Component F-Forced A-Equip Failure F-Admin 1-Manual Exhibit F & H S-Sch d B-Maint or Test G-Oper Error 2-Manual Scram Instructions for C-Refueling H-Other 3-Auto Scram Preparation of D-Regulatory Restriction 4-Continued Data Entry Sheet E-Operator Training 5-Reduced Load Licensee Event Report

& License Examination 9-Other (LER) File (NUREG-0161; 8511200310 351109 4 (0625M) PDR ADOCK O R