ML20235E952

AO 2-72-3:on 720426,both Diesel Generators Started & Loaded According to Station Procedures.On 720427,diesel Generator Stable & Tripped Manually from Control Room.Caused by Damaged Rectifier in Control Sys

ML20235E952
Person / Time
Site:	Quad Cities, 05000000
Issue date:	04/27/1972
From:	Stephenson B COMMONWEALTH EDISON CO.
To:	Morris P US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20235B311	List: IA-87-111, Submits Rept on Plant,As Discussed in ACRS 150th Meeting on 721012-14.Listed Items Can Be Resolved During Const & Facility Can Be Constructed W/Reasonable Assurance for Operation W/O Undue Risk to Public Safety IR 05000254/1972009 IR 05000358/1972003 IR 05000358/1973001 IR 05000358/1973002 IR 05000358/1973003 IR 05000358/1973005 IR 05000358/1973006 IR 05000358/1973007 IR 05000358/1974001 IR 05000358/1974002 IR 05000358/1974003 IR 05000358/1975004 ML20235B308 ML20235B364 ML20235B401 ML20235B405 ML20235B424 ML20235B456 ML20235B461 ML20235B465 ML20235B477 ML20235B488 ML20235B507 ML20235B552 ML20235B582 ML20235B585 ML20235B588 ML20235B605 ML20235B618 ML20235B623 ML20235B649 ML20235B656 ML20235B662 ML20235B670 ML20235B679 ML20235B683 ML20235B687 ML20235B702 ML20235B708 ML20235B713 ML20235B714 ML20235B718 ML20235B720 ML20235B730 ML20235B734 ML20235B748 ML20235B754 ML20235B762 ML20235B764 ... further results
References
FOIA-87-111 2-72-3, NUDOCS 8709280343
Download: ML20235E952 (1)

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REF- QUAD CITISS NUCLEAR POWER STATION DPR-29 AND DPR-30 APPENDIX A SECTION 6.6.A.! - UNITS ONE AND TWO - THE WATER LEVEL IN THE-UNIT TWO REACTOR VESSEL WAS LOWERED FOR FINAL VISUAL INSPECTION PRIOR TO HEAD INSTALLATION. TO PREVENT AUTO INITI ATION OF THE .

EMERGENCY DIESSL GENERATORS, JUMPERS WERE. AUTHORIZED. IN ERROR THE JUMPERS WERE PLACED ON UNIT ONE PANEL INSTEAD OF UNIT TWO -

PANEL AT 700PM ON 4-26-72. AS A RESULT BOTH DIESEL GENERATORS 2/ ,! !/2 STARTED AT 11:56PM ON 4-26-72 AND WERE LOADED ACCORDING ,

TO STATION PROCEDURES. AT 12:32AM ON 4-27-72 DIESEL GENERATOR (STABLE AND WAS TRIPPED MANUALLY FROM THE CONTROL ROOM.

INVESTIGATION REVEALED A DAMAGED RECTIFIER IN THE CONTROL SYSTEM. THE ERROR IN JUMPER PLACEMENT WAS CORRECTED AT 5AMK ON 4-27-72. THIS ABNORMAL OCCURANCE IS REPORTED AS INCIEENT 2-72-3 COMMONWEALTH EDISON CO QUAD CITY NUCLEAR POWER STATION 1-B B STEPHENSON - .

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