05000454/LER-1994-017, Cancelled

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Cancelled
Person / Time
ML20080P670
Site:	Byron
Issue date:	02/23/1995
From:	Schwartz G COMMONWEALTH EDISON CO.
To:	NRC
References
LER-94-017, LER-94-17, NUDOCS 9503080083
Download: ML20080P670 (1)
v • d • e

LER-1994-017, Cancelled

Event date:
Report date:
4541994017R00 - NRC Website
v • d • e

text

y Commonwcalth litison Company l$yron Generating Station 4iS:t North Gernun Church R:ud 13yron, IL 610lO-W94 Tel 81523 65441 DATE February 23, 1995 LTR:

BYRON 95-0084 FILE:

3.03.0800 (1.10.0101)

U.S. Nuclear Regulatory Commission Document Control Desk Washington, D.C.

20555

Dear Sir:

For Docket Number 50-454, Licensee Event Report Number 94-017 from Byron Generating Station will not be used.

Sincerely,

/

/Y zwze[

G.K. Schwartz

~~

Station Manager N

Byron Nuclear Power Station GKS/DSK/bl cc:

J. Martin, NRC Region III Administrator NRC Senior Resident Inspector INPO Record Center CECO Distribution List 9503080083 950223

^

PDR ADOCK 05000454 3

PDR (pi\\95byltrs\\by950084.wpf)

A l'nnuni Company

Licensee Event Report

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10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |

		Reporting criterion
05000455/LER-1994-000, :on 940923,rod Drive 2BD Power Cabunet Urgent Failures & Subsequent Reactor Trip Occurred Due to Drop in Rcca.Rack Connector Socket for Group 2 Stationary Regulation Card Repaired	on 940923,rod Drive 2BD Power Cabunet Urgent Failures & Subsequent Reactor Trip Occurred Due to Drop in Rcca.Rack Connector Socket for Group 2 Stationary Regulation Card Repaired	10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications
05000455/LER-1994-001-08, :on 940219,discovered That TS Required Temp Reading for Div 22 Cable Spreading Room Not Being Taken at Correct Location Due to Personnel Error.Personnel Involved Counseled on Attention to Detail	on 940219,discovered That TS Required Temp Reading for Div 22 Cable Spreading Room Not Being Taken at Correct Location Due to Personnel Error.Personnel Involved Counseled on Attention to Detail	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(1)
05000454/LER-1994-001-13, :on 941014,senior Licensed Operator Absent from CR Due to Shift Supervisor Getting Distracted.Identification Badge Being Worn by CR Supervisor to Be Reminded of Role & Responsibilities	on 941014,senior Licensed Operator Absent from CR Due to Shift Supervisor Getting Distracted.Identification Badge Being Worn by CR Supervisor to Be Reminded of Role & Responsibilities	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(1)
05000454/LER-1994-001-05, :on 940201,discovered Several Valves May Not Stroke Under High Differential Pressure Conditions Due to Inadequate Torque Switch Setting.Caution Cards Placed on Effected Valves	on 940201,discovered Several Valves May Not Stroke Under High Differential Pressure Conditions Due to Inadequate Torque Switch Setting.Caution Cards Placed on Effected Valves	10 CFR 50.73(a)(2)(v), Loss of Safety Function
05000454/LER-1994-002-09, :on 940309,main Steam Safety Valves Setpoints Found Out of Tolerance Due to Calculation Error.Amend to TSs to Allow Tolerance of +3% Requested.Valve Setpoints Will Be Retested by 940509	on 940309,main Steam Safety Valves Setpoints Found Out of Tolerance Due to Calculation Error.Amend to TSs to Allow Tolerance of +3% Requested.Valve Setpoints Will Be Retested by 940509	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications
05000454/LER-1994-003-01, :on 940314,AF Isolation Valve Was Exposed to Potentially Harsh Environ Due to Flood Seal Removal. Verified That AF Tunnel Fso Plates in Place on Both Units & Required That Fso Plates Remained in Place	on 940314,AF Isolation Valve Was Exposed to Potentially Harsh Environ Due to Flood Seal Removal. Verified That AF Tunnel Fso Plates in Place on Both Units & Required That Fso Plates Remained in Place	10 CFR 50.73(a)(2)(v), Loss of Safety Function
05000454/LER-1994-003-06, :on 940314,AFW Isolation Valve Exposure to Potentially Harsh Environ Occurred Due to Flood Seal Removal.Afw Tunnel Fso Plates Verified in Place	on 940314,AFW Isolation Valve Exposure to Potentially Harsh Environ Occurred Due to Flood Seal Removal.Afw Tunnel Fso Plates Verified in Place	10 CFR 50.73(a)(2)(v), Loss of Safety Function
05000455/LER-1994-003-10, :on 940924,rod Dropped Into Core Resulting in Reactor Trip & Corresponding AFW Actuation Due to Failure of Main Steam Header Pressure Controller.Controller Replaced.W/	on 940924,rod Dropped Into Core Resulting in Reactor Trip & Corresponding AFW Actuation Due to Failure of Main Steam Header Pressure Controller.Controller Replaced.W/	10 CFR 50.73(a)(2)(iv), System Actuation
05000454/LER-1994-004-09, :on 940423,discovered That Oc Waste Gas Decay Had Not Been Sampled After Radioactive Matls Added.Caused by Poor Work Practices & Inadequate Training.Corrective Action:Personnel Retrained	on 940423,discovered That Oc Waste Gas Decay Had Not Been Sampled After Radioactive Matls Added.Caused by Poor Work Practices & Inadequate Training.Corrective Action:Personnel Retrained	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications
05000454/LER-1994-005, Informs That for Docket 50-454,LER 94-005 from Byron Generating Station Will Not Be Used	Informs That for Docket 50-454,LER 94-005 from Byron Generating Station Will Not Be Used
05000454/LER-1994-006-04, :on 940715,fuel Assembly Located in Wrong Region of Spent Fuel Pool Due to Personnel Error.Nuclear Matl Custodian & Individual That Performed Independent Verification Counseled	on 940715,fuel Assembly Located in Wrong Region of Spent Fuel Pool Due to Personnel Error.Nuclear Matl Custodian & Individual That Performed Independent Verification Counseled	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(i)
05000454/LER-1994-007-06, :on 940801,during Rcfr Monthly Surveillance 1B Wide Range Hot Leg RTD Spiked Low.Caused by Splice at RTD Pigtail & Field Cable.Butt Splice Will Be Installed During Next Refueling Outage	on 940801,during Rcfr Monthly Surveillance 1B Wide Range Hot Leg RTD Spiked Low.Caused by Splice at RTD Pigtail & Field Cable.Butt Splice Will Be Installed During Next Refueling Outage	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications
05000454/LER-1994-008-06, :on 940803,discovered That Since 940304,CS Valves Not Stroke Time Tested in Closed Direction Due to Misinterpretation of TS Requirements.Ist Review That Added Valves Verified as Complete	on 940803,discovered That Since 940304,CS Valves Not Stroke Time Tested in Closed Direction Due to Misinterpretation of TS Requirements.Ist Review That Added Valves Verified as Complete	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications
05000454/LER-1994-009, :on 940908,Unit Unexpectedly Tripped Twice. Cause of First Trip Never Determined.Cause of Second Trip Attributed to Personnel Error.Extensive Trouble Shooting & Implemented Software Change	on 940908,Unit Unexpectedly Tripped Twice. Cause of First Trip Never Determined.Cause of Second Trip Attributed to Personnel Error.Extensive Trouble Shooting & Implemented Software Change	10 CFR 50.73(a)(2)(iv), System Actuation 10 CFR 50.73(a)(2)
05000454/LER-1994-009-07, :on 940908,reactor Trips Occurred During Planned Shutdown Due to Solid State Protection Sys Failure. Caused by Personnel Error.Event Placed in Required Reading for Sys Engineering Dept	on 940908,reactor Trips Occurred During Planned Shutdown Due to Solid State Protection Sys Failure. Caused by Personnel Error.Event Placed in Required Reading for Sys Engineering Dept	10 CFR 50.73(a)(2)(iv), System Actuation
05000454/LER-1994-010, Informs That LER Number 94-010 from Plant Will Not Be Used	Informs That LER Number 94-010 from Plant Will Not Be Used
05000454/LER-1994-011, Informs That LER Number 94-011 from Plant Will Not Be Used	Informs That LER Number 94-011 from Plant Will Not Be Used
05000454/LER-1994-012-05, :on 941006,increased Tube Degradation in Plant, Unit 1 Sg.Caused by Axial Oriented ODSCC Located at Hot Leg Tube Regions Bounded by Tube Support Plates	on 941006,increased Tube Degradation in Plant, Unit 1 Sg.Caused by Axial Oriented ODSCC Located at Hot Leg Tube Regions Bounded by Tube Support Plates	10 CFR 50.72(b)(3)(ii), Degraded or Unanalyzed Condition
05000454/LER-1994-013-03, :on 941007,SX Basin Level Switch Breaker Left in Wrong Position After Maint.Caused by Failure of Electrical Maint Dept to Return Equipment to Operating Dept. SX Basin Level Switch Reenergized	on 941007,SX Basin Level Switch Breaker Left in Wrong Position After Maint.Caused by Failure of Electrical Maint Dept to Return Equipment to Operating Dept. SX Basin Level Switch Reenergized	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(i)
05000454/LER-1994-014-04, :on 940915,declared DG Inoperable in Mode 5 Due to Misinterpretation of TS Requirements.Revised Procedures & Electronic Work Control Sys	on 940915,declared DG Inoperable in Mode 5 Due to Misinterpretation of TS Requirements.Revised Procedures & Electronic Work Control Sys	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(i)
05000454/LER-1994-015, :on 941014,senior Licensed Operator Momentarily Left CR Due to Becoming Distracted.Importance of SRO Duties in CR Communicated to Licensed Operating Personnel Via Daily Orders Placed on 941019 & 1210	on 941014,senior Licensed Operator Momentarily Left CR Due to Becoming Distracted.Importance of SRO Duties in CR Communicated to Licensed Operating Personnel Via Daily Orders Placed on 941019 & 1210	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications
05000454/LER-1994-016, Cancelled	Cancelled
05000454/LER-1994-017, Cancelled	Cancelled
05000454/LER-1994-018-02, :on 941208,operation of Safety Injection Pump in Mode 4 W/O Two Modes of Isolation from RCS Due to Personnel Error.Counseled Individuals Involved & Enhanced Procedure BOP SI-5	on 941208,operation of Safety Injection Pump in Mode 4 W/O Two Modes of Isolation from RCS Due to Personnel Error.Counseled Individuals Involved & Enhanced Procedure BOP SI-5	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(1)
05000454/LER-1994-019-02, :on 941215,missed TS Surveillance Due to Operator Not Recording Info.Ro Involved Counselled to Maintain Proper Documentation of Surveillance Requirements	on 941215,missed TS Surveillance Due to Operator Not Recording Info.Ro Involved Counselled to Maintain Proper Documentation of Surveillance Requirements	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications

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