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Category:REPORTABLE OCCURRENCE REPORT (SEE ALSO AO
MONTHYEARML17313A9921999-06-21021 June 1999 Special Rept:On 990525,RMS mini-computer Was Removed from Service to Implement Yr 2000 Mod & Was OOS Longer than 72 H Allowed.Caused by Planned Y2K Mods.Preplanned Alternate Sampling Program Was Initiated ML17313A9911999-06-18018 June 1999 Special Rept:On 990510,loose-part Detection Sys Channel 2 Was Declared Inoperable.Caused by Malfunction of Mineral Cable Connector to Accelerometer.Licensee Will Implement Modifications Which Will Enhance loose-part Detection Sys ML17313A5401998-08-13013 August 1998 Special Rept:On 980715,declared PASS Inoperable.Caused by Failure of Offgas Flush/Purge Control Handswitch HS0101. Handswitch Replaced & Post Maintenance Retesting Was Initiated ML17313A1271997-11-26026 November 1997 Special Rept 2-SR-97-002:on 971103,loose-part Detection Sys Channel 2 Declared Inoperable.Caused by Malfunction of Coaxial Cable Connector to accelerometer.Loose-part Detection Sys Channel Will Be Reworked ML17312A6871996-04-0505 April 1996 Rev 1 to Special Rept 2-SR-96-001,on 960404,alert Declared Due to Fire in Voltage Regulator for CR & Remote Shutdown Panel Essential Lighting,Clarifying Status of Power to UPS 2EQDNN02.Further Investigations Into Event Being Performed ML17312A6611996-04-0404 April 1996 Special Rept 2-SR-96-001:on 960404,fault Occurred in Voltage Regulator for CR & Remote Shutdown Panel Essential Lighting, Resulting in Fire in 100 Ft Elevation of Cb B Battery Equipment Room & Requiring Declaration of Alert,Per EPIP-04 ML17312A5771996-03-0101 March 1996 Special Rept 1-SR-96-01 on:960225,unit 1 Turbine Tripped Followed by Reactor Power Cutback.Caused by Lightning Strike.Unit 1 Will Not Be Connected to Grid Until Repairs Can Be Made to C Neutral Bushing of Transformer ML17311A8971995-05-25025 May 1995 Special Rept:On 950416,loose-part Detection Sys Channel 1 Declared Inoperable.Caused by Malfunction of Coaxial Cable Connector to Transducer.Channel Will Be Reworked & Returned to Svc During First Available Outage of Sufficient Duration ML17310B3621994-06-0909 June 1994 Special Rept 1-SR-94-001:on 940511,plant Ventilation Sys High Range Effluent Monitors in Units 1 & 2 Inoperable for Periods Greater than 72 H.Caused by High Voltage Failure Alarm.Design Change Package Installed ML17310B3071994-05-20020 May 1994 Special Rept 2-SR-94-002:on 940518,NOUE Declared Due to Fire Which Burned in Excess of 10 Minutes within Protected Area. Fire Extinguished W/Portable Fire Extinguisher.Investigation Initiated to Determine Cause of Fire & Develop C/As ML17310A9951994-01-13013 January 1994 Suppl 2 to Special Rept 3-SR-92-006:on 921217,PASS Declared Inoperable for Greater than Seven Days Following Failure to Meet Pressurized Sample Portion of Acceptance Criteria for Monthly Functional Sr.Pass Declared Operable on 921226 ML17310A9941994-01-13013 January 1994 Suppl 2 to Special Rept 2-SR-92-004:on 921222,PASS Declared Inoperable for Greater than Seven Days Due to Failure of Containment Air Flow Indicator & Indication of Water Leakage at PASS RCS Sample Septum.Pass Declared Operable on 930105 ML17310A8951994-01-0303 January 1994 Special rept:1-SR-93-008:on 940103,fuel Bldg Ventilation Sys High Range Radiation Monitor Inoperable for Period Greater than 72 Hours.Caused by Difficulties in Installing Mod 1-FJ-SQ-060 ML17310A8701993-12-25025 December 1993 Special Rept 1-SR-93-006:on 931224,30 Day Period for Returning loose-part Detection Sys (Lpds) to Operable Status Exceeded.Inoperable Lpds Channel Scheduled to Be Reworked & Returned to Svc During Next Outage of Sufficient Duration ML17310A8671993-12-15015 December 1993 Special Rept 1-SR-93-007:on 931215,30 Day Period for Returning Accelerometer to Operable Condition Exceeded. Accelerometer Will Be Replaced During Next Outage of Sufficient Duration ML17310A7581993-10-30030 October 1993 Special Rept 1-SR-93-004:on 931008,high Range RM RU-146 Made Inoperable for Period of Greater than 72 H as Result of Scheduled Electrical Bus Outage.Maint on Associated Bus Completed on 931015 & RU-146 Returned to Service ML17310A7001993-10-0909 October 1993 Special Rept 2-SR-93-003:on 931002,thirty Day Period for Returning loose-part Detection Sys Channel 8 to Operable Status Exceeded.Subj Channel Scheduled to Be Reworked & Returned to Svc During Next Outage ML17310A6301993-09-13013 September 1993 Special Rept 3-SR-93-003:on 930806,loose-part Detection Sys (Lpds) Declared Inoperable & Exceeded 30 Day Period for Being Returned to Svc on 930905.LPDS Channel 5 Scheduled to Be Reworked & Returned to Svc During Next Outage ML17310A5401993-08-11011 August 1993 Special Rept 1-SR-93-003:on 930806,NOUE Declared When Unit 1 CR Received Verification That Meteorological Instrumentation Unavailable Due to Loss of Power to Meteorological Tower. Caused by Severe Weather.Instrumentation Repaired ML17310A4961993-08-0202 August 1993 Special Rept 2-SR-93-002:on 930722,Unit 2 in Mode 5,Cold Shutdown During Refueling Outage When ISI of Both SGs Completed.Insp Resulted in Plugging of 74 Tubes in SG 1 & 175 Tubes in SG 2 ML17310A4401993-07-12012 July 1993 Special Rept 1-SR-93-002:on 930526,period for Returning Min Number of Explosive Gas Monitoring Channels to Operable Condition Exceeded.After All Four Cells Rebuilt,Calibr Completed on 930602 & Subj Analyzer Returned to Svc ML17306B4231993-04-24024 April 1993 Suppl 1 to Special Repts 2-SR-92-004 & 3-SR-92-006:on 921222 Unit 2 PASS Declared Inoperable Due to Failure of Containment Air Flow Indicator.On 921217,Unit 3 PASS Declared Inoperable.Equipment Replaced & Sample Obtained ML17306B3371993-03-15015 March 1993 Special Rept 2-SR-93-001:on 930314,control Room Personnel Manually Tripped Reactor Due to Rapid Decrease in Pressurizer Heaters.Personnel Commenced Controlled Plant Cooldown.Unit Remains Shut Down for Further Investigation ML17306B2901993-02-22022 February 1993 Special Rept 1-SR-92-005,suppl 1,provided Per Emergency Plan Implementing Procedure EPIP-03, Notification of Unusual Event Implementing Actions, Occurring on 920822 Re Loss of Power at Meteorological Tower ML17306B2781993-02-0909 February 1993 Special Rept 3-SR-93-001:on 930204,reactor Trip Occurred & Main Feedwater Pump a Experienced Rapidly Decreasing Pump Speed.Valid Actuation of SI Actuation Sys & Containment Isolation Actuation Sys Also Occurred.Evaluation Underway ML17306B2721993-01-27027 January 1993 Special Rept 3-SR-004-03:on 920817,PASS Inoperable for More than 7 Days.On 920902,discovered That PASS Unable to Draw Vacuum on Gaseous Sample Bomb.Vent Line Reworked & Procedure Revised ML17306B2551993-01-24024 January 1993 Special Rept 2-SR-92-004:on 921222,PASS Declared Inoperable for Period Greater than 7 Days Due to Failure of Containment Air Flow Indicator & Indication of Water Leakage at PASS Rcs.Pass Returned to Operable Status on 930105 ML17306B2561993-01-24024 January 1993 Special Rept 1-SR-92-007:on 921227,CB Atmosphere RM Inoperable for Period Greater than 72 H Due to High Flow Conditions.Temporary Mod Installed on Subj RM to Remove Monitor from Dedicated Rms Grounding Sys ML17306B2541993-01-22022 January 1993 Special Rept 3-SR-92-006:on 921217,PASS Declared Inoperable Following Failure to Meet Pressurized Sample Portion of Acceptance Criteria for Monthly Functional Sr.Pass Returned to Operable Status Following Satisfactory Repairs & Testing ML17306B1911992-12-21021 December 1992 Special Rept 3-SR-92-004-01:on 920201 PASS Declared Inoperable for Period Greater than Seven Days.Caused by Tubing Being Rerouted.Pass Reworked & Operability Restored on 920905 ML17306B1841992-12-14014 December 1992 Special Rept:On 920810,PASS Declared Inoperable Due to Tubing Being Rerouted.Chemistry Sys Status Procedure 74DP-9ZZ04 Revised to Direct Chemistry Personnel to Ensure That Functional Test Is performed.W/921214 Ltr ML17306B1291992-11-17017 November 1992 Special Rept 2-SR-92-003:on 921113,reactor Trip Occurred While Motor Generator Set a Out of Svc for Scheduled Maint & Set B Inadvertently Deenergized,Resulting in Loss of Power. State & Local Agencies Notified & Sys Reset ML17306B0931992-10-30030 October 1992 Suppl 1 to Special Rept 3-SR-92-004:on 920817,seven-day Period for Returning PASS to Service exceeded.30DP-9WP04 Revised to Retest for PASS & Gaseous Radwaste to Be Completed by 921120 ML17306A9951992-09-18018 September 1992 Special Rept 3-SR-92-004:seven-day Period for Returning PASS to Svc Exceeded on 920817.On 920902,discovered That PASS Unable to Draw Vacuum on Gaseous Sample Bomb.Possibly Caused by Maint on 920810.PASS Reworked & Operability Restored ML17306A9651992-09-16016 September 1992 Special Rept 3-SR-92-003:on 920903,discovered That PASS Unable to Draw Vacuum on Gaseous Sample Bomb & Declared Inoperable for More than 7 Days.Cause Under Investigation. Sys Returned to Operable Status on 920905 ML17306A9401992-08-28028 August 1992 Special Rept 1-SR-92-005:on 920822,discovered That Info Could Not Be Dispatched from Meterological Tower During Routine Surveillance of Daily Midnight Logs.Tower Declared Operable on 920823 Following Power Restoration ML17306A8101992-06-27027 June 1992 Special Rept 1-SR-92-004:on 920620,loose Part Detection Sys Inoperable for More than 30 Days.Caused by Hardware Problems Associated W/Installation of Loose Part Detection Sys Mods.New Computer Processor Board Installed ML17306A7971992-06-18018 June 1992 Special Rept 3-SR-92-003:on 920520,RMs RU-145 & 146 Declared Inoperable & Removed from Svc.Caused by Personnel Errors in Documenting Clearance for Retest of RU-146.Shift Supervisor Disciplined & Technician Verified That Pumps Were Energized ML17306A7961992-06-18018 June 1992 Special Rept 1-SR-92-003:on 920514,unit 1 Entered Mode 3 & PASS Declare Inoperable & Failed Surveillance Test.Caused by Leaking Relief Valve & Malfunctioning Pressure Transducer. Relief Valve & Pressure Transducer Replaced ML17306A7101992-05-0606 May 1992 Special Rept:On 920504,Control Room Received Alarms on All Seven Control Boards.Plan Computer Returned to Svc & Was Declared operable.W/920506 Ltr ML17306A6811992-04-18018 April 1992 Special Rept SR-92-002:on 920411,insp of SGs Resulted in Plugging of 23 Tubes in SG 1 & 18 Tubes in SG 2.Complete Results of SG Tube ISI Will Be Submitted by 930411 ML17306A4521992-02-0707 February 1992 Special Rept:On 920101,PASS Declared Inoperable When Chemistry Personnel Could Not Obtain a Containment Air Sample.Caused by Malfunctioning Flow Sensor.Pass Expected to Be Returned to an Operable status.W/920207 Ltr ML17306A3901992-01-0707 January 1992 Special Rept 1-SR-92-001:on 920102,determined That Leak Existed in Pressurizer Steam Space Instrument Nozzle Mfg from Inconnel 600.Caused by Nonvisible Intergranular Crack.Addl Investigation Underway ML17306A2981991-12-0505 December 1991 Special Rept 2-SR-91-002:on 911107,fuel Bldg Ventilation Sys high-range Radioactive Gaseous Effluent Monitor Inoperable for More than 72 H.Caused by Power Supply Deenergized for Scheduled Maint.Monitor Returned to Svc on 911114 ML17306A2791991-11-20020 November 1991 Special Rept 3-SR-91-007:on 911115,mobile Crane Came in Contact W/Energized 13.8 Kv Power Line Resulting in Arcing of Crane Outrigger Pads to Ground & Burning of Asphalt Area in Contact W/Pads.Investigation Re Event Being Performed ML17306A2221991-10-10010 October 1991 Special Rept 1-SR-91-001-01:on 910111,fuel Bldg Ventilation Sys High Range Radioactive Gaseous Effluent Monitor Declared Inoperable for Period Greater than 72 H in Order to Perform Scheduled 18-month Surveillance Testing & Maint ML17306A2211991-10-10010 October 1991 Special Rept 2-SR-89-007-03:on 891002,fuel Bldg Ventilation Sys High Range Gaseous Effluent Monitor Declared Inoperable for More than 72 H.Caused by Low Flow Limit Switch Being Out of Adjustment.Microprocessor Operated Manual Mode ML17306A2201991-10-10010 October 1991 Special Rept 2-SR-90-005-01:on 900716,plant Vent Sys High Range Effluent Monitor Inoperable for More than 72 H.Caused by Requirement to Perform Scheduled 18-month Surveillance Testing.Monitor Returned to Svc on 900729 ML17306A2181991-10-10010 October 1991 Special Rept 2-SR-90-004-01:on 910613,fuel Bldg Ventilation Sys high-range Radioactive Gaseous Effluent Monitor Inoperable for More than 72 H.Caused by Need to Perform 18 Month Surveillance Testing.Monitor Returned to Svc ML17305B7441991-09-18018 September 1991 Special Rept 1-SR-91-002,on 910914:steam Generator Econimizer Valve SGN-FV-1112 Fully Opened Causing Level in Steam Generator 1 to Rapidly Increase.Caused by Malfunction of Lower Gripper High Voltage on Slipped Part Length CEA 1999-06-21
[Table view] Category:LER)
MONTHYEARML17313A9921999-06-21021 June 1999 Special Rept:On 990525,RMS mini-computer Was Removed from Service to Implement Yr 2000 Mod & Was OOS Longer than 72 H Allowed.Caused by Planned Y2K Mods.Preplanned Alternate Sampling Program Was Initiated ML17313A9911999-06-18018 June 1999 Special Rept:On 990510,loose-part Detection Sys Channel 2 Was Declared Inoperable.Caused by Malfunction of Mineral Cable Connector to Accelerometer.Licensee Will Implement Modifications Which Will Enhance loose-part Detection Sys ML17313A5401998-08-13013 August 1998 Special Rept:On 980715,declared PASS Inoperable.Caused by Failure of Offgas Flush/Purge Control Handswitch HS0101. Handswitch Replaced & Post Maintenance Retesting Was Initiated ML17313A1271997-11-26026 November 1997 Special Rept 2-SR-97-002:on 971103,loose-part Detection Sys Channel 2 Declared Inoperable.Caused by Malfunction of Coaxial Cable Connector to accelerometer.Loose-part Detection Sys Channel Will Be Reworked ML17312A6871996-04-0505 April 1996 Rev 1 to Special Rept 2-SR-96-001,on 960404,alert Declared Due to Fire in Voltage Regulator for CR & Remote Shutdown Panel Essential Lighting,Clarifying Status of Power to UPS 2EQDNN02.Further Investigations Into Event Being Performed ML17312A6611996-04-0404 April 1996 Special Rept 2-SR-96-001:on 960404,fault Occurred in Voltage Regulator for CR & Remote Shutdown Panel Essential Lighting, Resulting in Fire in 100 Ft Elevation of Cb B Battery Equipment Room & Requiring Declaration of Alert,Per EPIP-04 ML17312A5771996-03-0101 March 1996 Special Rept 1-SR-96-01 on:960225,unit 1 Turbine Tripped Followed by Reactor Power Cutback.Caused by Lightning Strike.Unit 1 Will Not Be Connected to Grid Until Repairs Can Be Made to C Neutral Bushing of Transformer ML17311A8971995-05-25025 May 1995 Special Rept:On 950416,loose-part Detection Sys Channel 1 Declared Inoperable.Caused by Malfunction of Coaxial Cable Connector to Transducer.Channel Will Be Reworked & Returned to Svc During First Available Outage of Sufficient Duration ML17310B3621994-06-0909 June 1994 Special Rept 1-SR-94-001:on 940511,plant Ventilation Sys High Range Effluent Monitors in Units 1 & 2 Inoperable for Periods Greater than 72 H.Caused by High Voltage Failure Alarm.Design Change Package Installed ML17310B3071994-05-20020 May 1994 Special Rept 2-SR-94-002:on 940518,NOUE Declared Due to Fire Which Burned in Excess of 10 Minutes within Protected Area. Fire Extinguished W/Portable Fire Extinguisher.Investigation Initiated to Determine Cause of Fire & Develop C/As ML17310A9951994-01-13013 January 1994 Suppl 2 to Special Rept 3-SR-92-006:on 921217,PASS Declared Inoperable for Greater than Seven Days Following Failure to Meet Pressurized Sample Portion of Acceptance Criteria for Monthly Functional Sr.Pass Declared Operable on 921226 ML17310A9941994-01-13013 January 1994 Suppl 2 to Special Rept 2-SR-92-004:on 921222,PASS Declared Inoperable for Greater than Seven Days Due to Failure of Containment Air Flow Indicator & Indication of Water Leakage at PASS RCS Sample Septum.Pass Declared Operable on 930105 ML17310A8951994-01-0303 January 1994 Special rept:1-SR-93-008:on 940103,fuel Bldg Ventilation Sys High Range Radiation Monitor Inoperable for Period Greater than 72 Hours.Caused by Difficulties in Installing Mod 1-FJ-SQ-060 ML17310A8701993-12-25025 December 1993 Special Rept 1-SR-93-006:on 931224,30 Day Period for Returning loose-part Detection Sys (Lpds) to Operable Status Exceeded.Inoperable Lpds Channel Scheduled to Be Reworked & Returned to Svc During Next Outage of Sufficient Duration ML17310A8671993-12-15015 December 1993 Special Rept 1-SR-93-007:on 931215,30 Day Period for Returning Accelerometer to Operable Condition Exceeded. Accelerometer Will Be Replaced During Next Outage of Sufficient Duration ML17310A7581993-10-30030 October 1993 Special Rept 1-SR-93-004:on 931008,high Range RM RU-146 Made Inoperable for Period of Greater than 72 H as Result of Scheduled Electrical Bus Outage.Maint on Associated Bus Completed on 931015 & RU-146 Returned to Service ML17310A7001993-10-0909 October 1993 Special Rept 2-SR-93-003:on 931002,thirty Day Period for Returning loose-part Detection Sys Channel 8 to Operable Status Exceeded.Subj Channel Scheduled to Be Reworked & Returned to Svc During Next Outage ML17310A6301993-09-13013 September 1993 Special Rept 3-SR-93-003:on 930806,loose-part Detection Sys (Lpds) Declared Inoperable & Exceeded 30 Day Period for Being Returned to Svc on 930905.LPDS Channel 5 Scheduled to Be Reworked & Returned to Svc During Next Outage ML17310A5401993-08-11011 August 1993 Special Rept 1-SR-93-003:on 930806,NOUE Declared When Unit 1 CR Received Verification That Meteorological Instrumentation Unavailable Due to Loss of Power to Meteorological Tower. Caused by Severe Weather.Instrumentation Repaired ML17310A4961993-08-0202 August 1993 Special Rept 2-SR-93-002:on 930722,Unit 2 in Mode 5,Cold Shutdown During Refueling Outage When ISI of Both SGs Completed.Insp Resulted in Plugging of 74 Tubes in SG 1 & 175 Tubes in SG 2 ML17310A4401993-07-12012 July 1993 Special Rept 1-SR-93-002:on 930526,period for Returning Min Number of Explosive Gas Monitoring Channels to Operable Condition Exceeded.After All Four Cells Rebuilt,Calibr Completed on 930602 & Subj Analyzer Returned to Svc ML17306B4231993-04-24024 April 1993 Suppl 1 to Special Repts 2-SR-92-004 & 3-SR-92-006:on 921222 Unit 2 PASS Declared Inoperable Due to Failure of Containment Air Flow Indicator.On 921217,Unit 3 PASS Declared Inoperable.Equipment Replaced & Sample Obtained ML17306B3371993-03-15015 March 1993 Special Rept 2-SR-93-001:on 930314,control Room Personnel Manually Tripped Reactor Due to Rapid Decrease in Pressurizer Heaters.Personnel Commenced Controlled Plant Cooldown.Unit Remains Shut Down for Further Investigation ML17306B2901993-02-22022 February 1993 Special Rept 1-SR-92-005,suppl 1,provided Per Emergency Plan Implementing Procedure EPIP-03, Notification of Unusual Event Implementing Actions, Occurring on 920822 Re Loss of Power at Meteorological Tower ML17306B2781993-02-0909 February 1993 Special Rept 3-SR-93-001:on 930204,reactor Trip Occurred & Main Feedwater Pump a Experienced Rapidly Decreasing Pump Speed.Valid Actuation of SI Actuation Sys & Containment Isolation Actuation Sys Also Occurred.Evaluation Underway ML17306B2721993-01-27027 January 1993 Special Rept 3-SR-004-03:on 920817,PASS Inoperable for More than 7 Days.On 920902,discovered That PASS Unable to Draw Vacuum on Gaseous Sample Bomb.Vent Line Reworked & Procedure Revised ML17306B2551993-01-24024 January 1993 Special Rept 2-SR-92-004:on 921222,PASS Declared Inoperable for Period Greater than 7 Days Due to Failure of Containment Air Flow Indicator & Indication of Water Leakage at PASS Rcs.Pass Returned to Operable Status on 930105 ML17306B2561993-01-24024 January 1993 Special Rept 1-SR-92-007:on 921227,CB Atmosphere RM Inoperable for Period Greater than 72 H Due to High Flow Conditions.Temporary Mod Installed on Subj RM to Remove Monitor from Dedicated Rms Grounding Sys ML17306B2541993-01-22022 January 1993 Special Rept 3-SR-92-006:on 921217,PASS Declared Inoperable Following Failure to Meet Pressurized Sample Portion of Acceptance Criteria for Monthly Functional Sr.Pass Returned to Operable Status Following Satisfactory Repairs & Testing ML17306B1911992-12-21021 December 1992 Special Rept 3-SR-92-004-01:on 920201 PASS Declared Inoperable for Period Greater than Seven Days.Caused by Tubing Being Rerouted.Pass Reworked & Operability Restored on 920905 ML17306B1841992-12-14014 December 1992 Special Rept:On 920810,PASS Declared Inoperable Due to Tubing Being Rerouted.Chemistry Sys Status Procedure 74DP-9ZZ04 Revised to Direct Chemistry Personnel to Ensure That Functional Test Is performed.W/921214 Ltr ML17306B1291992-11-17017 November 1992 Special Rept 2-SR-92-003:on 921113,reactor Trip Occurred While Motor Generator Set a Out of Svc for Scheduled Maint & Set B Inadvertently Deenergized,Resulting in Loss of Power. State & Local Agencies Notified & Sys Reset ML17306B0931992-10-30030 October 1992 Suppl 1 to Special Rept 3-SR-92-004:on 920817,seven-day Period for Returning PASS to Service exceeded.30DP-9WP04 Revised to Retest for PASS & Gaseous Radwaste to Be Completed by 921120 ML17306A9951992-09-18018 September 1992 Special Rept 3-SR-92-004:seven-day Period for Returning PASS to Svc Exceeded on 920817.On 920902,discovered That PASS Unable to Draw Vacuum on Gaseous Sample Bomb.Possibly Caused by Maint on 920810.PASS Reworked & Operability Restored ML17306A9651992-09-16016 September 1992 Special Rept 3-SR-92-003:on 920903,discovered That PASS Unable to Draw Vacuum on Gaseous Sample Bomb & Declared Inoperable for More than 7 Days.Cause Under Investigation. Sys Returned to Operable Status on 920905 ML17306A9401992-08-28028 August 1992 Special Rept 1-SR-92-005:on 920822,discovered That Info Could Not Be Dispatched from Meterological Tower During Routine Surveillance of Daily Midnight Logs.Tower Declared Operable on 920823 Following Power Restoration ML17306A8101992-06-27027 June 1992 Special Rept 1-SR-92-004:on 920620,loose Part Detection Sys Inoperable for More than 30 Days.Caused by Hardware Problems Associated W/Installation of Loose Part Detection Sys Mods.New Computer Processor Board Installed ML17306A7971992-06-18018 June 1992 Special Rept 3-SR-92-003:on 920520,RMs RU-145 & 146 Declared Inoperable & Removed from Svc.Caused by Personnel Errors in Documenting Clearance for Retest of RU-146.Shift Supervisor Disciplined & Technician Verified That Pumps Were Energized ML17306A7961992-06-18018 June 1992 Special Rept 1-SR-92-003:on 920514,unit 1 Entered Mode 3 & PASS Declare Inoperable & Failed Surveillance Test.Caused by Leaking Relief Valve & Malfunctioning Pressure Transducer. Relief Valve & Pressure Transducer Replaced ML17306A7101992-05-0606 May 1992 Special Rept:On 920504,Control Room Received Alarms on All Seven Control Boards.Plan Computer Returned to Svc & Was Declared operable.W/920506 Ltr ML17306A6811992-04-18018 April 1992 Special Rept SR-92-002:on 920411,insp of SGs Resulted in Plugging of 23 Tubes in SG 1 & 18 Tubes in SG 2.Complete Results of SG Tube ISI Will Be Submitted by 930411 ML17306A4521992-02-0707 February 1992 Special Rept:On 920101,PASS Declared Inoperable When Chemistry Personnel Could Not Obtain a Containment Air Sample.Caused by Malfunctioning Flow Sensor.Pass Expected to Be Returned to an Operable status.W/920207 Ltr ML17306A3901992-01-0707 January 1992 Special Rept 1-SR-92-001:on 920102,determined That Leak Existed in Pressurizer Steam Space Instrument Nozzle Mfg from Inconnel 600.Caused by Nonvisible Intergranular Crack.Addl Investigation Underway ML17306A2981991-12-0505 December 1991 Special Rept 2-SR-91-002:on 911107,fuel Bldg Ventilation Sys high-range Radioactive Gaseous Effluent Monitor Inoperable for More than 72 H.Caused by Power Supply Deenergized for Scheduled Maint.Monitor Returned to Svc on 911114 ML17306A2791991-11-20020 November 1991 Special Rept 3-SR-91-007:on 911115,mobile Crane Came in Contact W/Energized 13.8 Kv Power Line Resulting in Arcing of Crane Outrigger Pads to Ground & Burning of Asphalt Area in Contact W/Pads.Investigation Re Event Being Performed ML17306A2221991-10-10010 October 1991 Special Rept 1-SR-91-001-01:on 910111,fuel Bldg Ventilation Sys High Range Radioactive Gaseous Effluent Monitor Declared Inoperable for Period Greater than 72 H in Order to Perform Scheduled 18-month Surveillance Testing & Maint ML17306A2211991-10-10010 October 1991 Special Rept 2-SR-89-007-03:on 891002,fuel Bldg Ventilation Sys High Range Gaseous Effluent Monitor Declared Inoperable for More than 72 H.Caused by Low Flow Limit Switch Being Out of Adjustment.Microprocessor Operated Manual Mode ML17306A2201991-10-10010 October 1991 Special Rept 2-SR-90-005-01:on 900716,plant Vent Sys High Range Effluent Monitor Inoperable for More than 72 H.Caused by Requirement to Perform Scheduled 18-month Surveillance Testing.Monitor Returned to Svc on 900729 ML17306A2181991-10-10010 October 1991 Special Rept 2-SR-90-004-01:on 910613,fuel Bldg Ventilation Sys high-range Radioactive Gaseous Effluent Monitor Inoperable for More than 72 H.Caused by Need to Perform 18 Month Surveillance Testing.Monitor Returned to Svc ML17305B7441991-09-18018 September 1991 Special Rept 1-SR-91-002,on 910914:steam Generator Econimizer Valve SGN-FV-1112 Fully Opened Causing Level in Steam Generator 1 to Rapidly Increase.Caused by Malfunction of Lower Gripper High Voltage on Slipped Part Length CEA 1999-06-21
[Table view] Category:TEXT-SAFETY REPORT
MONTHYEARML17300B3811999-09-30030 September 1999 Monthly Operating Repts for Sept 1999 for Pvngs,Units 1,2 & 3.With 991007 Ltr ML17300B3271999-08-31031 August 1999 Monthly Operating Rept for Aug 1999 for Pvngs,Units 1,2 & 3 ML17313B0751999-08-27027 August 1999 LER 99-002-00:on 990730,test Mode Trip Bypass for EDG Output Breakers Not Surveilled.Cause Under Investigation.Operations Personnel Conservatively Invoked SR 3.0.3 for SR 3.8.1.13. with 990827 Ltr ML17313B0611999-07-31031 July 1999 Monthly Operating Repts for July 1999 for Pvngs,Units 1,2 & 3.With 990810 Ltr ML17313B0191999-07-16016 July 1999 LER 99-005-00:on 990618,RT on Low DNBR Was Noted.Caused by Hardware Induced Calculation Error.Cr Operator Was Taken to Place Reactor in Stable Condition IAW Appropriate Operating Procedure ML17300B3151999-06-30030 June 1999 Monthly Operating Repts for June 1999 for Pvngs,Units 1,2 & 3.With 990714 Ltr ML17313A9921999-06-21021 June 1999 Special Rept:On 990525,RMS mini-computer Was Removed from Service to Implement Yr 2000 Mod & Was OOS Longer than 72 H Allowed.Caused by Planned Y2K Mods.Preplanned Alternate Sampling Program Was Initiated ML17313A9911999-06-18018 June 1999 Special Rept:On 990510,loose-part Detection Sys Channel 2 Was Declared Inoperable.Caused by Malfunction of Mineral Cable Connector to Accelerometer.Licensee Will Implement Modifications Which Will Enhance loose-part Detection Sys ML17313A9731999-05-31031 May 1999 Monthly Operating Repts for May 1999 for Pvngs,Units 1,2 & 3.With 990608 Ltr ML17313A9281999-05-0707 May 1999 LER 99-004-00:on 990408,PSV Lift Pressures Were Outside of TS Limits.Caused by Lift Pressure Setpoint Drift.Psvs Have Been Tested,Disassembled,Inspected,Reassembled & Certified at Wyle Labs ML17313A9201999-04-30030 April 1999 Monthly Operating Repts for Apr 1999 for Pvngs,Units 1,2 & 3.With 990512 Ltr ML17313A8951999-04-14014 April 1999 LER 99-003-00:on 990317,required Surveillance Requirement Not Completed Due to Deficient Procedure,Was Determined. Caused by Cognitive Personnel Error.St Procedures Revised to Require Chiller to Be Operating & Oil Temperature Checked ML17313A8921999-04-13013 April 1999 LER 98-003-01:on 980902,discovered That MSSV as-found Lift Pressures Were Outside TS Limits.Caused by Bonding of Valve Disc to Nozzle Seat.Affected Valves Were Adjusted,Retested & Returned to Svc ML17313A8891999-04-0909 April 1999 LER 99-001-00:on 990310,RT on High Pressurizer Pressure Was Noted.Caused by Loss of Heat Removal.Cr Supervisor Was Removed from Shift Duties for Diagnostics Skills Training. with 990409 Ltr ML17300B3071999-03-31031 March 1999 Seismic Portion of Submittal-Only Screening Review of Palo Verde Nuclear Generating Station Units Ipeee. ML17313A8801999-03-31031 March 1999 Monthly Operating Repts for Mar 1999 for Pvngs,Units 1,2 & 3.With 990412 Ltr ML20207M9231999-03-12012 March 1999 Amended Part 21 Rept Re Cooper-Bessemer Ksv EDG Power Piston Failure.Total of 198 or More Pistons Have Been Measured at Seven Different Sites.All Potentially Defective Pistons Have Been Removed from Svc Based on Encl Results ML20207H7471999-03-10010 March 1999 1999 Emergency Preparedness Exercise 99-E-AEV-03003 ML17313A8361999-03-0101 March 1999 LER 99-001-00:on 990103,TS Violation for Power Dependent Insertion Limit Alarm Being Inoperable.Caused by Personnel Error.Revised Procedure to Clarify How Computer Point Is to Be Returned to Scan Mode.With 990302 Ltr ML17313A8501999-02-28028 February 1999 Monthly Operating Repts for Feb 1999 for Palo Verde Nuclear Generating Station.With 990311 Ltr ML17313A7791999-02-0505 February 1999 Safety Evaluation Accepting Licensee Rev to Emergency Plan That Would Result in Two Less Radiation Protection Positions Immediatelu Available During Emergencies ML17313A8061999-01-31031 January 1999 Monthly Operating Repts for Jan 1999 for Pvngs,Units 1,2 & 3.With 990218 Ltr ML17313A7701999-01-15015 January 1999 LER 96-008-00:on 960507,inadequate Procedure Results in Nuclear Power Channels Not Calibrated During Power Ascension Tests Occurred.Caused by Deficient Procedure.Procedure Revised ML17313A7381998-12-31031 December 1998 Monthly Operating Repts for Dec 1998 for Palo Verde Nuclear Generating Station,Units 1,2 & 3.With 990113 Ltr ML20206H2101998-12-31031 December 1998 SCE 1998 Annual Rept ML17313A7031998-11-30030 November 1998 Monthly Operating Repts for Nov 1998 for Pvngs,Unit 1,2 & 3. with 981209 Ltr ML17313A6701998-11-0404 November 1998 Rev 2 to PVNGS Unit 2 Colr. ML17313A6741998-10-31031 October 1998 Monthly Operating Repts for Oct 1998 for Pvngs,Units 1,2 & 3.With 981109 Ltr ML17313A6611998-10-24024 October 1998 LER 98-008-00:on 980729,EQ of Electrical Connectors Were Not Adequately Demonstrated.Caused Because Test Was Conducted with Only Single Lv Connector & Without Fully Ranged Inputs. Revised EQ Requirements ML17313A6561998-09-30030 September 1998 Monthly Operating Rept for Sept 1998 for PVNGS Units 1,2 & 3.With 981007 Ltr ML17313A5961998-09-14014 September 1998 LER 98-002-00:on 980814,B Train H Recombiner Was Noted Inoperable Due to cross-wired Power Receptacle.Cause of Event Is Under investigation.Cross-wired Power Supply Receptacle for B Train H Recombiner Was re-wired ML17313A5761998-09-0808 September 1998 LER 98-003-01:on 980113,discovered That One Channel of RWT Level Sys Had Failed High.Caused by Water Intrusion Into Electrical Termination Pull Box.Weep Holes Were Drilled Into Bottoms of Pull Boxes Nearest Level Transmitters ML17313A5591998-08-28028 August 1998 LER 98-001-00:on 980730,entered TS 3.0.3 Due to Safety Injection Flow Instruments Being Removed from Svc.Caused by Personnel Error.Transmitters Were Unisolated & Returned to svc.W/980828 Ltr ML20151S0941998-08-21021 August 1998 Rev 6 to COLR for PVNGS Unit 3 ML20151S0861998-08-21021 August 1998 Rev 4 to COLR for PVNGS Unit 1 ML20151S0901998-08-21021 August 1998 Rev 1 to COLR for PVNGS Unit 2 ML18066A2771998-08-13013 August 1998 Part 21 Rept Re Deficiency in CE Current Screening Methodology for Determining Limiting Fuel Assembly for Detailed PWR thermal-hydraulic Sa.Evaluations Were Performed for Affected Plants to Determine Effect of Deficiency ML17313A5401998-08-13013 August 1998 Special Rept:On 980715,declared PASS Inoperable.Caused by Failure of Offgas Flush/Purge Control Handswitch HS0101. Handswitch Replaced & Post Maintenance Retesting Was Initiated ML17313A5301998-07-31031 July 1998 Monthly Operating Repts for July 1998 for Pvgns,Units 1,2 & 3.W/980812 Ltr ML17313A5201998-07-30030 July 1998 LER 98-004-00:on 980630,personnel Discovered That Pressure Safety Valve Had Not Received Periodic Set Pressure Test for ASME Class 1 Pressure Safety Valve.Caused by Personnel Error.Pressure Safety Valve reviewed.W/980730 Ltr ML17313A5791998-07-0707 July 1998 to PVNGS SG Tube ISI Results for Seventh Refueling Outage Mar & Apr 1998. ML17313A5001998-06-30030 June 1998 Monthly Operating Repts for June 1998 for Palo Verde Nuclear Generating Station,Units 1,2 & 3.W/980710 Ltr ML17313A4671998-06-19019 June 1998 LER 98-007-00:on 980520,CR Personnel Observed Flow & Pressure Perturbations on Chemical & Vol Control Sys Letdown Sys.Caused by Cyclic Fatigue Due to Dynamic Pressure Transients.Unit Letdown Piping Replaced ML17313A4521998-06-19019 June 1998 Rev 5 to COLR for Pvngs,Unit 3. ML17313A4501998-06-19019 June 1998 Rev 4 to COLR for Pvngs,Unit 3. ML17313A4131998-06-0505 June 1998 LER 98-006-00:on 980507,determined That Plant Was Outside Design Basis Due to SI Discharge Check Valve Reverse Flow. Check Valve Was Disassembled,Examined & Reassembled, Whereupon Valve Met Acceptance Criteria ML17313A4211998-05-31031 May 1998 Monthly Operating Repts for May 1998 for Pvngs,Units 1,2 & 3.W/980609 Ltr ML17313A3951998-05-26026 May 1998 LER 98-005-00:on 980428,noted That Required Response Time Testing Had Not Been Performed.Caused by Personnel Error. Coached I&C Personnel Responsible for Reviewing Work Authorization Documentation ML17313A3691998-04-30030 April 1998 Monthly Operating Repts for Apr 1998 for PVNGS.W/980412 Ltr ML17313A3251998-04-0101 April 1998 LER 98-004-00:on 980304,safety Valves as-found Pressures Out of Tolerance.Cause of Event Is Under Investigation.Three Mssv'S & Psv Will Be Replaced W/Refurbished & Recertified Valves During Refueling Outage U1R7 1999-09-30
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ACCELER ED DOCUMENT DISTR IBUT1ON SYSTEM REGUL~ ORY INFORMATION DISTRIBUT . SYSTEM (RIDE)
ACCF(SSION NBR:9305050113 DOC.DATE: 93/04/24 NOTARIZED: NO DOCKET FACIL:STN-50-529 Palo Verde Nuclear Station, Unit,2,arizona-Pub1i.,05000529 STN-50-530 Palo Verde Nuclear Station, Uiii't '3,Arizona Publi 05000530 AUTH. NAME AUTHOR AFFILIATION LEVINE,J.M. Arizona Public Service Co. (formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Document.-Control Branch (Document Control Desk)
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SUBJECT:
Suppl 1 to Special .Repts 2-SR-92-. 004 & .3-SR-92-006:on 921222 unit 2 PASS declared inoperable due to failure of containment air flow indicator. On 921217,Unit 3 PASS declared inoperable. Equipment replaced & sample obtained.
DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR ENCL SIZE:
TITLE: 50.73/50.9 Licensee Event Report (LER), ncident Rpt, etc.
NOTES:Standardized plant. 05000529 Standardized plant. 05000530 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PDV LA 1 1 PDV PD 1 1 TRAMMELL,C 1 1 TRAN,L 1- 1 INTERNAL: ACNW 2 2 ACRS 2 2
'AEOD/DOA 1 1 AEOD/DSP/TPAB 1 1 AEOD/ROAB/DSP 2 2 NRR/DE/EELB 1 1 NRR/DE/EMEB 1 1 NRR/DORS/OEAB 1 1 NRR/DRCH/HHFB 1 1 NRR/DRCH/HICB 1 1 NRR/DRCH/HOLB 1 1 NRR/DRIL/RPEB 1 1 NRR/DRSS/PRPB 2 2 NR SPLB 1 1 NRR/DSSA/SRXB 1 1 EG FI E 02 1 1 RES/DSIR/EIB 1 1 R ILE 01 1 1 EXTERNAL: EG&G BRYCE,J.H 2 2 L ST LOBBY WARD 1 1 NRC PDR 1 1 NSIC MURPHYiG A ~ 1 - 1 NSIC POOREFW. 1 1 NUDOCS FULL TXT 1 1 NOTE TO ALL"RIDS" RECIPIENTS PLEASE HELP US TO REDUCE WASTE! CONTACT fHE DOCUMENT COiNTROL DESK.
ROOM Pl-37 (EXT. 504-2065) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T iNEED!
TOTAL NUMBER OF COPIES REQUIRED: LTTR 33 ENCL 33
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Arizona Public Service Company PALO VERDE NUCLEAR GENERATING STATION P.O. BOX 52034 ~ PHOENIX, ARIZONA 85072-2034 JAMES M LEVINE 192-00838-JML/TRB/KR VICE PRES'lOENT NUCLEAR PAODUC1ION April 24, 1993 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Mail Station P1-37 Washington, D.C, 20555
Dear Sirs:
Subject:
Palo Verde Nuclear Generating Station (PVNGS)
Units 2 and 3 Docket Nos. STN 50-529 and 50-530 License Nos. NPF-51 and NPF-74 Supplement 1 to Special Reports 2-SR-92-004 and 3-SR-92-006 File: 93-020-404 Enclosed is Supplement 1 to Special Reports 2-SR-92-004 and 3-SR-92-006 prepared and submitted pursuant to Technical Specifications (TS) 3.3.3.1 ACTION 28 and TS 6.9.2.
Enclosure 1 contains the reports which discuss the Post Accident Sampling System (PASS) being inoperable for greater than seven (7) days in Units 2 and 3. Enclosure 2 contains the cause of the inoperability and the actions to prevent recurrence as determined by our evaluation performed in accordance with the PVNGS Incident investigation Program. A copy of this supplement is being forwarded to the Regional Administrator, NRC Region V.
lf you have any questions, please contact T. R. Bradish, Manager, Nuclear Regulatory Affairs at (602) 393-5421.
Sincerely,
/~(
JML/TRB/KR/rv
Enclosures:
- 1. Special Reports 2-SR-92-004-01 and 3-SR-92-006-01
- 2. Cause of Post Accident Sampling System Inoperability
, cc: W. F. Conway (all with enclosures)
J. B. Martin J. A. Sloan AAAc A~]
9305050ii3 930424 PDR ADQCK 05000529
~pvF 8 PDR
ENCLOSURE 1 SPECIAL REPORTS 2-SR-92-004-01 AND 3-SR-92-006-01
PALO VERDE NUCL'EARGENERATING STATION UNIT 2 POST ACCIDENT SAMPLING SYSTEM INOPERABLE GREATER THAN SEVEN DAYS Docket No. 50-529 1
License No. NPF-51 Special Report No. 2-SR-92-004-01 INITIALCONDITIONS:
This Special Report is being submitted pursuant to Technical Specifications (TS) 3.3.3.1 ACTION 28 and TS 6.9.2 to report an event in which the Post Accident Sampling System (PASS) was inoperable for a period greater than seven (7) days. The seven-day period for returning PASS to service was exceeded at approximately 0830 MST on December 29, 1992.
BACKGROUND INFORMATION'ASS is designed to sample reactor coolant and containment atmosphere under post accident conditions. The liquid sample portion of the system provides pressurized and depressurized reactor coolant samples as required for analysis. The gas sample portion of the system provides containment atmosphere samples as required for analysis.
ACTIONS TAKEN:
On December 22, 1992, Palo Verde Unit 2 was in Mode 1 (POWER OPERATION) when Control Room personnel declared PASS inoperable at approximately 0830 MST due to the failure of the containment air flow indicator and the indication of water leakage at the PASS reactor coolant system sample septum. The Preplanned Alternate Sampling Program was initiated in accordance with TS 3.3.3.1 ACTION 28.
I The failures were identified during the performance of the TS monthly functional surveillance. On December 23, 1992, the containment air flow indicator was repaired and tested, On December 24, 1992, troubleshooting commenced to identify the source of the leakage. The troubleshooting involved extensive coordination between Unit 2 Maintenance and Unit 2 Chemistry personnel to simulate system parameters and valve lineups necessary to draw the reactor coolant system pressurized sample. The source of the leakage was difficultto identify and the replacement of multiple valves was required in order to obtain a pressurized sample and declare the system operable.
lI Special Report 2-SR-92-004-01 On January 3, 1993, following restoration of PASS, a pressurized sample was obtained and the acceptance criteria for the monthly functional surveillance requirement was met.
The work documents were closed on January 5, 1993.
PLANS AND SCHEDULE FOR RESTORING THE SYSTEM TO SERVICE:
Following satisfactory completion of repairs and required surveillance testing, PASS was returned to OPERABLE status at approximately 1545 MST on January 5, 1993.
PALO VERDE NUCLEAR GENERATING STATION UNIT 3 POST ACCIDENT SAMPLING SYSTEM INOPERABLE GREATER THAN SEVEN DAYS Docket No. 50-530
~ 1 License No. NPF-74 Special Report No. 3-SR-92-006-01 INITIALCONDITIONS:
This Special Report is being submitted pursuant to Technical Specifications (TS) 3.3.3.1 ACTION 28 and TS 6.9.2 to report an event in which the Post Accident Sampling System (PASS) was inoperable for a period greater than seven (7) days. The seven-day period for returning PASS to service was exceeded at approximately 1515 MST on December 24, 1992.
BACKGROUND INFORMATION:
PASS is designed to sample reactor coolant and containment atmosphere under post accident conditions. The liquid sample portion of the system provides pressurized and depressurized reactor coolant samples as required for analysis. The gas sample portion of the system provides containment atmosphere samples as required for analysis.
ACTIONS TAKEN:
On December 17, 1992, Palo Verde Unit 3 was in Mode 1 (POWER OPERATION) when Control Room personnel declared PASS inoperable at approximately 1515 MST following the failure to meet the pressurized sample portion of the acceptance criteria for the monthly functional surveillance requirement. On December 19, 1992, following troubleshooting, two valves (HV-22 and HV-23) were replaced due to suspected leakage.
An additional valve (PSV-101) was replaced when Chemistry technicians could not establish a vacuum on the PASS pressurized sample flask. When Chemistry technicians were unable to obtain the proper flow for the PASS pressurized sample, following troubleshooting, it was discovered that an incorrect actuator was installed during the replacement of HV-22. Following replacement of the actuator, at approximately 1625 MST on December 22, 1992, a pressurized sample was obtained and the acceptance criteria for the monthly functional surveillance requirement was met.
Special Report 3-SR-92-006-01 However, on December 22, 1992, a new revision of the monthly functional surveillance procedure, which included intent changes, became effective and Unit 3 Chemistry management determined that the pressurized portion of the surveillance testing (ST) should be reperformed using the new ST procedure. PASS failed to meet the pressurized sample portion of the new acceptance criteria for the monthly functional surveillance requirement.
On December 23, 1992, during attempts to reperform the PASS pressurized sample portion of the ST, Chemistry technicians -discovered seat leakage on valve HV-22 and packing leakage on HV-23. Further troubleshooting, performed on December 24, 1992, discovered that HV-22 had been installed backwards. At approximately 1815 MST on December 24, 1992, the'Preplanned Alternate Sampling Program was initiated in accordance with TS 3.3.3.1 ACTION 28. On December 26, 1992, following replacement of HV-22 and restoration of PASS, a pressurized sample was obtained and the acceptance criteria for the monthly functional surveillance requirement was met.
PLANS AND SCHEDULE FOR RESTORING THE SYSTEM TO SERVICE:
Following satisfactory completion of repairs and required surveillance testing, PASS was returned to OPERABLE status at approximately 1100 MST on December 26, 1992.
II ENCLOSURE 2 CAUSE OF POST ACCIDENT SAMPLING SYSTEM INOPERABILITY
Special Reports 2-SR-92-004-01 and 3-SR-.92-006-04 CAUSE OF THE INOPERABILITY An evaluation was performed in accordance with the PYNGS Incident Investigation Program. The evaluation identified that several weaknesses existed in the processes used in testing, troubleshooting, and repairing PASS that contributed to delays in returning PASS to an operable status within the seven day period allowed by the TS ACTION statement. The evaluation determined that these weaknesses have persisted because management attention was not adequately applied to ensure that personnel had the adequate tools and/or training available to restore PASS to an operable status. The following weaknesses were identified by the evaluation:
Inadequate documentation (i.e., system description and technical manuals) and drawings resulted in the development of work documents which did not provide sufficient guidance for troubleshooting and repair for PASS restoration.
- 2. Chemistry technicians responsible for the operation of PASS had not been expected to possess specific PASS system/component design knowledge required to assist in troubleshooting, thereby impeding their ability to communicate pertinent information to the work group and expedite the return of PASS to an operable status.
- 3. Schedulers, planners, and maintenance technicians had not been expected to possess specific PASS system/component design knowledge, thereby impeding their ability to generate, as well as implement, work documents necessary to return PASS to an operable status. The improper valve installations that occurred during recent PASS repair activities are not only attributable to personnel error or poor work practices, but also to insufficient understanding of PASS 3-way valve orientation and PASS flow paths.
4 Due to PASS complexity and restricted access, regular maintenance, troubleshooting, and repairs are time-consuming. This weakness has been discussed, however, an evaluation to examine PASS configuration as well as component reliability to determine if practical upgrades to facilitate PASS maintenance activities were feasible and cost beneficial was not initiated.
The items discussed above are indicative of a lack of management attention to the longstanding problems with PASS. To address these issues, the following corrective actions are being implemented to ensure PASS is restored to an operable status in a timely manner.
- 1. A memo was distributed to Site Chemistry personnel stating that PASS troubleshooting and repair is to be coordinated with the responsible work group rather than through the system engineer.
<<'pecial Reports".-2-SR-:92-004 01 and 3-.SR-92-006-01
- 2. Existing training for chemistry technicians, maintenance technicians, schedulers, and planners will be evaluated and upgraded as necessary to ensure that enhanced PASS system/component information is incorporated. The evaluation is expected to be completed by June 30, 1993.
- 3. APS Engineering will review past corrective maintenance documents to determine if PASS component reliability problems exist. The review is expected to be completed by July 30, 1993.
- 4. APS Engineering will evaluate the current PASS configuration and determine the practicality of design upgrades to facilitate future PASS maintenance activities. The evaluation is expected to be completed by July 30, 1993.
- 5. The development of a model work document, which should significantly reduce the process to troubleshoot and repair PASS, is expected to be completed by Octobel 30, 1993. In addition, a review of existing PASS documentation and drawings and their accessibility will be performed in parallel with the development of the model work order.
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