Cancelled
Person / Time
ML19256E985
Site:	Zion File:ZionSolutions icon.png
Issue date:	11/14/1979
From:	COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
LER-79-023, LER-79-23, NUDOCS 7911160330
Download: ML19256E985 (1)
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LER-1979-023, Cancelled

Event date:
Report date:
2951979023R00 - NRC Website
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text

NOV 141979 NOTE TO: CENTRAL FILES FROM:

R. B. Tracy, Document Management Branch SUBJECT: LER'S Please note that LER number 77-2.3 for docket number 50- 29 5 has been cancelled. This note should be placed in the LER file for the applicable docket.

Robert B. Tracy Document Management Branch Division of Technical Information and Document Control cc: RIDS Distribution Pattern A002 1

W'7 b

7911160 33o 1341 332

Licensee Event Report

Zion

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		Reporting criterion
05000304/LER-1979-001-01, Has Been Voided	Has Been Voided
05000295/LER-1979-001, Has Been Voided	Has Been Voided
05000304/LER-1979-002, Forwards LER 79-002/03L-0	Forwards LER 79-002/03L-0
05000295/LER-1979-002, Forwards LER 79-002/03L-0	Forwards LER 79-002/03L-0
05000304/LER-1979-002-03, /03L-0 on 790107:during Surveillance,Bus 238 Transformer Feed Failed to Auto Reclose When re-energized. Caused by Dirty Relay Contacts	/03L-0 on 790107:during Surveillance,Bus 238 Transformer Feed Failed to Auto Reclose When re-energized. Caused by Dirty Relay Contacts
05000295/LER-1979-002-03, /03L-0 on 790108:blower of 1RE-0011,containment Vent Particulate Monitor,Tripped.Caused by Fuse Failure in Control Room Monitor	/03L-0 on 790108:blower of 1RE-0011,containment Vent Particulate Monitor,Tripped.Caused by Fuse Failure in Control Room Monitor
05000295/LER-1979-003, Forwards LER 79-003/01T-0	Forwards LER 79-003/01T-0
05000295/LER-1979-003-01, /01T-0 on 790109:Westinghouse Results of Feb 1978 ECCS Model Analysis Determined That Fq Limit Should Be 1.86 Rather than the Current Limit of 2.02.Plant Operations Modified to Adhere to New Limit	/01T-0 on 790109:Westinghouse Results of Feb 1978 ECCS Model Analysis Determined That Fq Limit Should Be 1.86 Rather than the Current Limit of 2.02.Plant Operations Modified to Adhere to New Limit
05000304/LER-1979-003, Has Been Voided	Has Been Voided
05000295/LER-1979-004, Forwards LER 79-004/03X-l	Forwards LER 79-004/03X-l
05000295/LER-1979-004-03, /03X-1 on 790112:inverter 114 Tripped & Could Not Be Reset;Hot Shutdown Not Reached within 4-h.Caused by Loose Contact in DC Breaker & Personnel Error in Late Start of Shutdown.Breaker Will Be Fixed,Personnel Reinstructed	/03X-1 on 790112:inverter 114 Tripped & Could Not Be Reset;Hot Shutdown Not Reached within 4-h.Caused by Loose Contact in DC Breaker & Personnel Error in Late Start of Shutdown.Breaker Will Be Fixed,Personnel Reinstructed
05000304/LER-1979-004-03, /03L-0 on 790109:during Normal Operation,Unit 2 Component Cooling Monitor 2RE0017 Failed Low,Intermittently Alarming in Control Room.Caused by Faulty Low Voltage Supply (Aul Instruments Model PSD-15)	/03L-0 on 790109:during Normal Operation,Unit 2 Component Cooling Monitor 2RE0017 Failed Low,Intermittently Alarming in Control Room.Caused by Faulty Low Voltage Supply (Aul Instruments Model PSD-15)
05000304/LER-1979-004, Forwards LER 79-004/03L-0	Forwards LER 79-004/03L-0
05000295/LER-1979-005-03, /03L-0 on 790115:penetration Sys Zone 2 Pressure Fell Below 41 Psig & Zone Flow Pegged High.Caused by Leak in Outer Purge Valves Pratt 42 Inch Butterfly Valves & Model RIA8 Ps Offset Disc During Cold Weather	/03L-0 on 790115:penetration Sys Zone 2 Pressure Fell Below 41 Psig & Zone Flow Pegged High.Caused by Leak in Outer Purge Valves Pratt 42 Inch Butterfly Valves & Model RIA8 Ps Offset Disc During Cold Weather
05000295/LER-1979-005, Forwards LER 79-005/03L-0	Forwards LER 79-005/03L-0
05000304/LER-1979-005, Has Been Voided	Has Been Voided
05000295/LER-1979-006-01, /01T-0 on 790202:addition of Too Much Boron Caused Temp Average to Drop Below 540 F.Caused by Inadequate Procedures Specifying When High Steam Flow Safety Injection Can Be Blocked.Procedures Clarified	/01T-0 on 790202:addition of Too Much Boron Caused Temp Average to Drop Below 540 F.Caused by Inadequate Procedures Specifying When High Steam Flow Safety Injection Can Be Blocked.Procedures Clarified
05000295/LER-1979-006, Forwards LER 79-006/01T-0	Forwards LER 79-006/01T-0
05000304/LER-1979-006-01, Has Been Voided	Has Been Voided
05000295/LER-1979-007-03, /03L-0 on 790204:OA Lake Discharge Tank Failed to Close Automatically When Activity Reached Setpoint.Caused by Faulty Electrical Relay.Contacts Cleaned & Relay Card Securely Reconnected.Monitor Functionally Tested & Verified	/03L-0 on 790204:OA Lake Discharge Tank Failed to Close Automatically When Activity Reached Setpoint.Caused by Faulty Electrical Relay.Contacts Cleaned & Relay Card Securely Reconnected.Monitor Functionally Tested & Verified
05000295/LER-1979-007, Forwards LER 79-007/03L-0	Forwards LER 79-007/03L-0
05000304/LER-1979-007-01, Has Been Voided	Has Been Voided
05000304/LER-1979-008-03, /03L-0 on 790209:when Closing MSIV 2D for Steam Generator Cleanup,Valve Began to Close,Then Reopened.Caused by Failure of Both DC Solenoid Valves to Shift When Energized.After Exercise,One Valve Replaced	/03L-0 on 790209:when Closing MSIV 2D for Steam Generator Cleanup,Valve Began to Close,Then Reopened.Caused by Failure of Both DC Solenoid Valves to Shift When Energized.After Exercise,One Valve Replaced
05000304/LER-1979-008, Forwards LER 79-008/03L-0	Forwards LER 79-008/03L-0
05000295/LER-1979-008, Forwards LER 79-008/03L-0	Forwards LER 79-008/03L-0
05000295/LER-1979-008-03, /03L-0 on 790206:gas Decay Tank Radiation Monitor ORT-PRO2B Alarmed High.High Alarm Would Not Reset.Caused by Failed Transistor on Circuit Board AA70.Transistor Replaced	/03L-0 on 790206:gas Decay Tank Radiation Monitor ORT-PRO2B Alarmed High.High Alarm Would Not Reset.Caused by Failed Transistor on Circuit Board AA70.Transistor Replaced
05000295/LER-1979-009-03, /03L-0 on 780930:quarterly Average Gaseous Release Rate Was Twice Annual Objective But Less than Tech Spec Max. Caused by Reactor Headvent During Refueling & Conservative Quantification Methods	/03L-0 on 780930:quarterly Average Gaseous Release Rate Was Twice Annual Objective But Less than Tech Spec Max. Caused by Reactor Headvent During Refueling & Conservative Quantification Methods
05000295/LER-1979-009, Forwards LER 79-009/03L-0	Forwards LER 79-009/03L-0
05000304/LER-1979-009, Forwards LER 79-009/03L-0	Forwards LER 79-009/03L-0
05000304/LER-1979-009-03, /03L-0 on 790210:MSIV Partially Opened.Hydraulic Pump Was Reenergized,Causing MSIV to Reclose.Cause Was Combination of Drain Valve Not Opening After MSIV Closure & Open Accumulator Leaking Gas	/03L-0 on 790210:MSIV Partially Opened.Hydraulic Pump Was Reenergized,Causing MSIV to Reclose.Cause Was Combination of Drain Valve Not Opening After MSIV Closure & Open Accumulator Leaking Gas
05000295/LER-1979-010, Has Been Voided	Has Been Voided
05000304/LER-1979-010-03, /03L-0 on 790214:Channel 2LT-460 Greater than 6% from Channel 2LT-461.Caused by Transmitter Had Zero & Span Shifted.Zero Adjustment Made,Transmitter Conservative for High & Low Level Trips	/03L-0 on 790214:Channel 2LT-460 Greater than 6% from Channel 2LT-461.Caused by Transmitter Had Zero & Span Shifted.Zero Adjustment Made,Transmitter Conservative for High & Low Level Trips
05000304/LER-1979-010, Forwards LER 79-010/03L-0	Forwards LER 79-010/03L-0
05000304/LER-1979-011, Has Been Voided	Has Been Voided
05000295/LER-1979-012-01, Has Been Voided	Has Been Voided
05000295/LER-1979-012-99, /99X-0 on 790327:safety Injection Initiated Due to Hi Steam Flow Signal Coincident W/Low Steam Pressure Bistables Tripped for Surveillance Testing.Caused by Setpoint Dropping to 40% During Inadvertent Reactor Trip	/99X-0 on 790327:safety Injection Initiated Due to Hi Steam Flow Signal Coincident W/Low Steam Pressure Bistables Tripped for Surveillance Testing.Caused by Setpoint Dropping to 40% During Inadvertent Reactor Trip
05000295/LER-1979-012, Forwards LER 79-012/99X-0	Forwards LER 79-012/99X-0
05000295/LER-1979-014, Has Been Voided	Has Been Voided
05000304/LER-1979-014-01, Cancelled	Cancelled
05000304/LER-1979-016, Cancelled	Cancelled
05000295/LER-1979-017-04, /04T-0 on 790314:boron Usage Exceeded Tech Spec Limits Between 790310 & 14.Caused by Drummed Radioactive Waste Consisting of Borated Water.Usage Has No Bearing on Water Quality Program	/04T-0 on 790314:boron Usage Exceeded Tech Spec Limits Between 790310 & 14.Caused by Drummed Radioactive Waste Consisting of Borated Water.Usage Has No Bearing on Water Quality Program
05000295/LER-1979-017, Forwards LER 79-017/04T-0	Forwards LER 79-017/04T-0
05000304/LER-1979-018-01, Cancelled	Cancelled
05000295/LER-1979-019-99, /99X-0 on 790316:inadvertent Safety Injection Occurred from False Steam Pressure Differential Signal in Loop B,Initiated by Waterhammer in 1C Feedwater Line.Caused by False Signal.Asco Solenoid Valve Replaced	/99X-0 on 790316:inadvertent Safety Injection Occurred from False Steam Pressure Differential Signal in Loop B,Initiated by Waterhammer in 1C Feedwater Line.Caused by False Signal.Asco Solenoid Valve Replaced
05000295/LER-1979-019, Forwards LER 79-019/99X-0	Forwards LER 79-019/99X-0
05000304/LER-1979-020-01, Cancelled	Cancelled
05000295/LER-1979-021, Cancelled	Cancelled
05000304/LER-1979-022-01, Cancelled	Cancelled
05000295/LER-1979-022, Cancelled	Cancelled
05000295/LER-1979-023, Cancelled	Cancelled
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05000295/LER-1979-023, Cancelled

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