Illinois Department of Nuclear Safety

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Illinois Department of Nuclear Safety (Illinois)

	Site	License number	Start date	Title	Topic
ENS 48511	Byron		1 October 2012 20:03:00	60-Day Optional Telephonic Notification of Invalid System Actuation
ENS 46184	Quad Cities		17 August 2010 19:14:00	Manual Reactor Scram Initiated Due to Recirculation Pump Trip
ENS 45352	LaSalle		16 September 2009 06:39:00	Loss of Communications	Health Physics Network
ENS 40493	Clinton		31 January 2004 00:45:00	Contractor Supervisor Tested Positive for Alcohol
ENS 40088	Rush North Medical Center	IL-01578-01	18 August 2003 16:00:00	Patient Exceeded Prescribed Dose.	Brachytherapy

	Site	Start date	Title
05000461/LER-2016-002, Regarding Trip of Fuel Building Ventilation Exhaust Fan Due to Moisture Formation Resulting in the Loss of Secondary Containment Vacuum	Clinton	13 April 2016	Regarding Trip of Fuel Building Ventilation Exhaust Fan Due to Moisture Formation Resulting in the Loss of Secondary Containment Vacuum
05000295/LER-2011-001, From Zion, Units 1 & 2 Improper Storage of Fuel Rod Storage Canister in Spent Fuel Pool	Zion	6 September 2011	From Zion, Units 1 & 2 Improper Storage of Fuel Rod Storage Canister in Spent Fuel Pool
05000461/LER-2003-002, From Clinton, Unit 1 Regarding Manual Reactor Scram Due to Main Turbine Vibrations Caused by Deficient Procedure Guidance	Clinton	9 June 2003	From Clinton, Unit 1 Regarding Manual Reactor Scram Due to Main Turbine Vibrations Caused by Deficient Procedure Guidance
05000454/LER-2003-001, Regarding Control Room Ventilation System Alignment Results in Inoperable Radiation Monitors Without Taking Required Actions Put Technical Specifications	Byron	23 May 2003	Regarding Control Room Ventilation System Alignment Results in Inoperable Radiation Monitors Without Taking Required Actions Put Technical Specifications
05000461/LER-2003-001, Human Performance Errors Result in Inoperable Containment Isolation Valve & Failure to Isolate Penetration within 4 Hours	Clinton	16 April 2003	Human Performance Errors Result in Inoperable Containment Isolation Valve & Failure to Isolate Penetration within 4 Hours
05000454/LER-2002-001-01, For Byron Unit 1 Multiple Main Steam Safety Valve Relief Tests Exceeded Required Tolerance Due to Disk to Nozzle Metallic Bonding and Setpoint Drift	Byron	15 November 2002	For Byron Unit 1 Multiple Main Steam Safety Valve Relief Tests Exceeded Required Tolerance Due to Disk to Nozzle Metallic Bonding and Setpoint Drift
05000461/LER-2002-003, Re Manufacturing Process Deficiency in Main Power Transformer Sudden Pressure Relay Causes False Actuation of Relay Resulting in Generator & Turbine Trip & Reactor Scram	Clinton	28 August 2002	Re Manufacturing Process Deficiency in Main Power Transformer Sudden Pressure Relay Causes False Actuation of Relay Resulting in Generator & Turbine Trip & Reactor Scram
05000461/LER-2002-002, Inadequate Preventive Maintenance Program for the Feedwater System Results in Lockup of a Turbine-Driven Reactor Feed Pump and Scram on High Reactor Pressure Vessel Water Level During Extended Power Uprate Testing	Clinton	11 July 2002	Inadequate Preventive Maintenance Program for the Feedwater System Results in Lockup of a Turbine-Driven Reactor Feed Pump and Scram on High Reactor Pressure Vessel Water Level During Extended Power Uprate Testing
05000454/LER-2002-002, Re Two or Three Pressurizer Safety Valve Relief Tests Exceeded Required Tolerance Due to Setpoint Drift	Byron	16 May 2002	Re Two or Three Pressurizer Safety Valve Relief Tests Exceeded Required Tolerance Due to Setpoint Drift
05000461/LER-1999-010-01, Inoperability of Div 2 EDG Caused by Fuel Leaking Into Lube Oil, Cancelled	Clinton	7 October 1999	Inoperability of Div 2 EDG Caused by Fuel Leaking Into Lube Oil, Cancelled
05000461/LER-1998-020-01, Forwards LER 98-020-01, Inadequate Flow Balancing of Shutdown SWS Results in Less than Required Flow to SWS Loads. Revised LER Provides Cause of Event & Corrective Actions	Clinton	14 September 1999	Forwards LER 98-020-01, Inadequate Flow Balancing of Shutdown SWS Results in Less than Required Flow to SWS Loads. Revised LER Provides Cause of Event & Corrective Actions
05000461/LER-1999-010, :on 990809,declared Div 2 EDG Inoperable Due to Fuel Leaking Into Lube Oil.Replaced Fuel Return Line from Engine Number 12 Cylinder on Div 2 Edg.With	Clinton	8 September 1999	on 990809,declared Div 2 EDG Inoperable Due to Fuel Leaking Into Lube Oil.Replaced Fuel Return Line from Engine Number 12 Cylinder on Div 2 Edg.With
05000461/LER-1999-009, :on 990617,failure to Satisfy Secondary Containment Bypass Leakage Rate TS Was Noted.Caused by Failure to Properly Classify Containment Penetrations. Procedures Revised.With	Clinton	15 July 1999	on 990617,failure to Satisfy Secondary Containment Bypass Leakage Rate TS Was Noted.Caused by Failure to Properly Classify Containment Penetrations. Procedures Revised.With
05000461/LER-1999-006, :on 990419,values Used for Containment & Drywell Free Vols Found to Be Smaller than Originally Analyzed Due to Inadequate Calculation Control During Initial Plant Const.With 9905517 Ltr	Clinton	17 May 1999	on 990419,values Used for Containment & Drywell Free Vols Found to Be Smaller than Originally Analyzed Due to Inadequate Calculation Control During Initial Plant Const.With 9905517 Ltr
05000461/LER-1998-030-01, Insufficient Suppression Pool Makeup Volume to Meet Design Basis Suppression Pool Level Requirements Following LOCA, Has Been Cancelled	Clinton	19 April 1999	Insufficient Suppression Pool Makeup Volume to Meet Design Basis Suppression Pool Level Requirements Following LOCA, Has Been Cancelled
05000461/LER-1998-013-01, Forwards LER 98-013-01, Remote Shutdown Panel Operation of Rcics May Be Prevented Following MCR Fire,Due to Supplier Design Lacking Circuit Isolation & 10CFR21 Rept Number 21-98-026.Without Part 21 Rept	Clinton	13 April 1999	Forwards LER 98-013-01, Remote Shutdown Panel Operation of Rcics May Be Prevented Following MCR Fire,Due to Supplier Design Lacking Circuit Isolation & 10CFR21 Rept Number 21-98-026.Without Part 21 Rept
05000461/LER-1998-024-01, Forwards LER 98-024-01,re Failure to Perform Surveillance Testing on Div II 4.16 Kv Bus Uvr within Specified Frequency.Commitments Listed	Clinton	19 October 1998	Forwards LER 98-024-01,re Failure to Perform Surveillance Testing on Div II 4.16 Kv Bus Uvr within Specified Frequency.Commitments Listed
05000295/LER-1997-022-01, Forwards LER 97-022-01,IAW 10CFR50.73(a)(2)(v).Commitments Made within Ltr,Encl	Zion	28 August 1998	Forwards LER 97-022-01,IAW 10CFR50.73(a)(2)(v).Commitments Made within Ltr,Encl
05000304/LER-1998-002, Forwards LER 98-002-00 IAW 10CFR50.73(a)(2)(i)(B). Commitments Made within Ltr,Encl	Zion	8 May 1998	Forwards LER 98-002-00 IAW 10CFR50.73(a)(2)(i)(B). Commitments Made within Ltr,Encl
05000295/LER-1997-018-01, Forwards LER 97-018-01,which Clarifies Info on Event Description,Root Causes & Safety Analysis.Corrective Actions Have Also Been Updated.Commitments Made within Ltr,Encl	Zion	10 April 1998	Forwards LER 97-018-01,which Clarifies Info on Event Description,Root Causes & Safety Analysis.Corrective Actions Have Also Been Updated.Commitments Made within Ltr,Encl
05000461/LER-1998-008, Forwards LER 98-008-00,re Division I Hydrogen & Oxygen Analyzer Incapable of Meeting Design Basis Due to an Excessive Vibration Condition on Air Compressor.Caused by Personnel Error.Commitments Made within Ltr,Listed	Clinton	8 April 1998	Forwards LER 98-008-00,re Division I Hydrogen & Oxygen Analyzer Incapable of Meeting Design Basis Due to an Excessive Vibration Condition on Air Compressor.Caused by Personnel Error.Commitments Made within Ltr,Listed
05000461/LER-1997-023-01, Inadequate Work Instructions Leads to Potential Over-Greasing of Motor Bearings Causing Potential Failure of Various Motors Has Been Canceled	Clinton	31 March 1998	Inadequate Work Instructions Leads to Potential Over-Greasing of Motor Bearings Causing Potential Failure of Various Motors Has Been Canceled
05000461/LER-1997-035-01, Forwards LER 97-035-01,re Divisions 1 & 2 Battery Chargers Incapable of Supplying Full Rated Voltage & Current Flow at Degraded Voltage Trip Setpoint IAW Plant TS & Design Basis.Commitments Made within Ltr,Listed	Clinton	19 March 1998	Forwards LER 97-035-01,re Divisions 1 & 2 Battery Chargers Incapable of Supplying Full Rated Voltage & Current Flow at Degraded Voltage Trip Setpoint IAW Plant TS & Design Basis.Commitments Made within Ltr,Listed
05000295/LER-1994-005-01, Forwards LER 94-005-01 Per 10CFR50.73(a)(2)(iv),which Requires 30 Day Written Rept When Any Event or Condition Resulted in Manual or Automatic Actuation of Any ESF, Including Rps.Commitments,Encl	Zion	16 January 1998	Forwards LER 94-005-01 Per 10CFR50.73(a)(2)(iv),which Requires 30 Day Written Rept When Any Event or Condition Resulted in Manual or Automatic Actuation of Any ESF, Including Rps.Commitments,Encl
05000295/LER-1997-026, Forwards LER 97-026-00,per 10CFR50.73(a)(2)(i)(B) Which Requires 30-day Written Rept.Commitments Associated W/Correspondence,Encl	Zion	8 January 1998	Forwards LER 97-026-00,per 10CFR50.73(a)(2)(i)(B) Which Requires 30-day Written Rept.Commitments Associated W/Correspondence,Encl
05000304/LER-1997-008, Forwards LER 97-008-00 Per 10CFR50.73(a)(2)(i)(B),which Requires 30 Day Written Rept.Attachment a Provides Commitments Associated W/Correspondence	Zion	22 December 1997	Forwards LER 97-008-00 Per 10CFR50.73(a)(2)(i)(B),which Requires 30 Day Written Rept.Attachment a Provides Commitments Associated W/Correspondence
05000295/LER-1997-025, Forwards LER 97-025-00,re Event Which Occurred at Zion Nuclear Power Station.Commitments Made within Ltr Aslo Encl	Zion	19 December 1997	Forwards LER 97-025-00,re Event Which Occurred at Zion Nuclear Power Station.Commitments Made within Ltr Aslo Encl
05000304/LER-1997-007, Forwards LER 97-007-00 Per 10CFR50.73(a)(2)(v)(B) Which Requires Written Rept for Any Event or Condition That Could Prevent Fulfillment of Safety Function of Structures or Sys Needed to Remove Residual Heat.W/Commitments Attach	Zion	1 December 1997	Forwards LER 97-007-00 Per 10CFR50.73(a)(2)(v)(B) Which Requires Written Rept for Any Event or Condition That Could Prevent Fulfillment of Safety Function of Structures or Sys Needed to Remove Residual Heat.W/Commitments Attached
05000304/LER-1997-005, Forwards LER 97-005-00 Which Documents Event That Occurred at Zion Nuclear Power Station,Unit 2.Commitment Made within Ltr,Encl	Zion	21 November 1997	Forwards LER 97-005-00 Which Documents Event That Occurred at Zion Nuclear Power Station,Unit 2.Commitment Made within Ltr,Encl
05000304/LER-1997-004, Forwards LER 97-004-00,per 10CFR50.73(a)(2)(i).Commitments Associated W/Correspondence,Encl	Zion	14 November 1997	Forwards LER 97-004-00,per 10CFR50.73(a)(2)(i).Commitments Associated W/Correspondence,Encl
05000295/LER-1997-001-01, Forwards LER 97-001-01,which Clarifies Info on Root Cause,Safety Analysis & Event Description.Corrective Actions Updated to Show Status of Items	Zion	14 November 1997	Forwards LER 97-001-01,which Clarifies Info on Root Cause,Safety Analysis & Event Description.Corrective Actions Updated to Show Status of Items
05000461/LER-1997-022-01, Forwards LER 97-022-01 & 10CFR21 Rept 21-97-036 Re Design of DG Ventilation Subsystems Outside Design Basis as Result of Failure to Include Min & Max Outside Air Temps Extremes,Due to Design Error.Ler Contains Listed Commitm	Clinton	13 November 1997	Forwards LER 97-022-01 & 10CFR21 Rept 21-97-036 Re Design of DG Ventilation Subsystems Outside Design Basis as Result of Failure to Include Min & Max Outside Air Temps Extremes,Due to Design Error.Ler Contains Listed Commitments
05000304/LER-1997-003, Forwards LER 97-003-00 Re Unit 2 RHR Sys Declared Inoperable,Per 10CFR50.73(a)(2)(v)(B)	Zion	13 November 1997	Forwards LER 97-003-00 Re Unit 2 RHR Sys Declared Inoperable,Per 10CFR50.73(a)(2)(v)(B)
05000304/LER-1997-002, Forwards LER 97-002-00,per 10CFR50.73(a)(2)(v)(B),which Requires 30 Day Written Rept.Commitments Associated W/Correspondence,Encl	Zion	11 November 1997	Forwards LER 97-002-00,per 10CFR50.73(a)(2)(v)(B),which Requires 30 Day Written Rept.Commitments Associated W/Correspondence,Encl
05000461/LER-1996-014-01, Forwards LER 96-014-01,containing Cause for Event & Corrective Actions to Prevent Recurrence Re Inadequately Tested Auxiliary Bldg Roof Plug.Commitments,Listed	Clinton	1 October 1997	Forwards LER 96-014-01,containing Cause for Event & Corrective Actions to Prevent Recurrence Re Inadequately Tested Auxiliary Bldg Roof Plug.Commitments,Listed
05000304/LER-1997-001, Forwards LER 97-001-00 Per 10CFR50.73(a)(2)(iv) Which Requires Written Rept Using NRC Form 366, License Event Rept, within 90 Days of Discovery of Event.Attachment a Contains Commitments Associated W/Ltr	Zion	1 October 1997	Forwards LER 97-001-00 Per 10CFR50.73(a)(2)(iv) Which Requires Written Rept Using NRC Form 366, License Event Rept, within 90 Days of Discovery of Event.Attachment a Contains Commitments Associated W/Ltr
05000295/LER-1994-010-01, :on 940702,Unit 1 RT Occurred Due to Generator/ Bus Duct Fire.Caused by Inadequate Design.Developed Guidelines for Improved Installation W/Revised Design	Zion	18 September 1997	on 940702,Unit 1 RT Occurred Due to Generator/ Bus Duct Fire.Caused by Inadequate Design.Developed Guidelines for Improved Installation W/Revised Design
05000295/LER-1997-019, Forwards LER 97-019-00 Re Failure to Test Safety Related Logic Circuits Required by Tech Specs.Attachment a Provides Commitments Associated W/Correspondence	Zion	18 September 1997	Forwards LER 97-019-00 Re Failure to Test Safety Related Logic Circuits Required by Tech Specs.Attachment a Provides Commitments Associated W/Correspondence
05000304/LER-1996-004-01, Forwards LER 96-004-01 Re Results of Investigation Into Failure of Unit Containment Inner Air Lock Door.Addl Corrective Action Listed in Attachment a	Zion	5 September 1997	Forwards LER 96-004-01 Re Results of Investigation Into Failure of Unit Containment Inner Air Lock Door.Addl Corrective Action Listed in Attachment a
05000295/LER-1997-015-02, :on 970724,Unit 1 EDGs & Unit 2 RHR Sys Were Declared Inoperable & Inadvertent Esg Actuation Was Noted While Performing TS Related Surveillances.Cause Is Under Investigation.Restored ESF Equipment	Zion	25 August 1997	on 970724,Unit 1 EDGs & Unit 2 RHR Sys Were Declared Inoperable & Inadvertent Esg Actuation Was Noted While Performing TS Related Surveillances.Cause Is Under Investigation.Restored ESF Equipment
05000461/LER-1997-021, Forwards LER 97-021-00 & 10CFR21 Rept 21-97-040,re Control Circuit for Division 1 EDG Feed Breaker Which Did Not Meet Basis Due to Design Error	Clinton	25 August 1997	Forwards LER 97-021-00 & 10CFR21 Rept 21-97-040,re Control Circuit for Division 1 EDG Feed Breaker Which Did Not Meet Basis Due to Design Error
05000461/LER-1997-013, :on 970508,failure to Adequately Verify That No Trips Existed During Surveillance Test Resulted in Inadvertent Actuation of Sgts.Caused by Personnel Error. Procedure CPS 9532.61 Was Revised	Clinton	4 June 1997	on 970508,failure to Adequately Verify That No Trips Existed During Surveillance Test Resulted in Inadvertent Actuation of Sgts.Caused by Personnel Error. Procedure CPS 9532.61 Was Revised
05000295/LER-1997-013-02, :on 970412,VT-3 Insp Requirements of Relief Request CR-13 for Reactor Head Bolting Were Not Performed. Caused by Failure to Revise ISI Database After SER Received from Nrc.Procedure Revised	Zion	2 June 1997	on 970412,VT-3 Insp Requirements of Relief Request CR-13 for Reactor Head Bolting Were Not Performed. Caused by Failure to Revise ISI Database After SER Received from Nrc.Procedure Revised
05000295/LER-1997-012, Forwards LER 97-012-00,which Documents 970423 Event That Occurred at Zion Generating Station.Commitments Made by Util,Listed	Zion	23 May 1997	Forwards LER 97-012-00,which Documents 970423 Event That Occurred at Zion Generating Station.Commitments Made by Util,Listed
05000295/LER-1997-010, :on 960316,reactor Trip Due to Equipment Failure Occurred.Caused by New But Defective Pneumatic Vol Booster on Valve.Pneumatic Vol Booster for 1C Main FW Regulating Valve Replaced	Zion	19 May 1997	on 960316,reactor Trip Due to Equipment Failure Occurred.Caused by New But Defective Pneumatic Vol Booster on Valve.Pneumatic Vol Booster for 1C Main FW Regulating Valve Replaced
05000295/LER-1997-009, Forwards LER 97-009-00 IAW 10CFR50.73(A)(2)(i)(B) Which Requires Listed Corrective Actions	Zion	14 May 1997	Forwards LER 97-009-00 IAW 10CFR50.73(A)(2)(i)(B) Which Requires Listed Corrective Actions
05000461/LER-1997-011, :on 860929,failed to Verify Breaker Closed at seven-day Frequency Required by TS Due to Omission of Breaker from Surveillance Procedure.Caused by Inadequate Procedures.Revised Procedures	Clinton	8 May 1997	on 860929,failed to Verify Breaker Closed at seven-day Frequency Required by TS Due to Omission of Breaker from Surveillance Procedure.Caused by Inadequate Procedures.Revised Procedures
05000295/LER-1997-007, Forwards LER 97-007-00 Re Automatic Actuation of Esf. Submitted Table Identifies Actions Committed to by Util	Zion	10 April 1997	Forwards LER 97-007-00 Re Automatic Actuation of Esf. Submitted Table Identifies Actions Committed to by Util
05000461/LER-1996-016-01, Forwards LER 96-016-01:re Residual Water Covering Portion of Disc/Seat Area During Testing Due to Design Not Allowing Complete Draining Results in Invalid Local Leak Rate Testing of Feedwater Containment Isolation	Clinton	27 March 1997	Forwards LER 96-016-01:re Residual Water Covering Portion of Disc/Seat Area During Testing Due to Design Not Allowing Complete Draining Results in Invalid Local Leak Rate Testing of Feedwater Containment Isolation
05000295/LER-1997-005, Forwards LER 97-005-00 IAW 10CFR50.73(a)(2)(i)(B).Actions Listed	Zion	24 March 1997	Forwards LER 97-005-00 IAW 10CFR50.73(a)(2)(i)(B).Actions Listed
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