LER-1981-021, /03L-0:on 810411,reactor Coolant Conductivity Was Discovered High.Probably Caused by Breakdown of Reactor Water Cleanup Sys Resins Which Accumulated in Vessel Prior to Startup.Resins Allowed to Decompose |
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| 3241981021R03 - NRC Website |
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U. S. NUCLEA*3 RE1ULATORY COMMIS$3ON
- NRC FORM 384 LICENSGE EVENT REPORT CONTROL 8 LOCK
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lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI 1
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8 EVENT OESCRIPTION AND PROSA8LE CONSEQUENCES h l
l While performing rou ine reactor coolant analvsis durinz a normal reactor startun_
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m l it was discovered that reactor coolant conductivity was greater than 2 umho/cm.
remained arenter l ITTTli Following startup and during normal load changes vessel conductivity This I
ITTTI y than 2 umho for 24.2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> with a maximum recorded value of 7.49 umho/cm.
I l o is 1 l event did not afi'ect the health or safety of the public.
i 10171 I Technical Specification 3.4.4. 6.9.1.9b I
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REvtsloN SEoufNTIAL OCCURRENCE REPORT EV ENT YEAR REPORT No.
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l 33 34 35 36 37 40 44 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l TIT) l The high vessel conductivity is believed to have resulted from a brenteant.rn of Rumi i
I g l system resins, which accumulated in the vessel prior to startuo from RWCU system l operation. These resins were allowed to decompose at vessel temperature and the I
An RWCU System evaluation is in I
g l reactor conductivity was reduced to < 2 umho.
l g i progress to determine and eliminate the cause of this event.
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o LER ATTACHMENT - RO # 2-81-21 Facility: BSEP Unit No. 2 Event Date: 4-10-81 This event occurred when suspected resins from the RWCU system accumulated in the reactor vessel due to an RWCU filter breakthrcugh. This resin decomposed at vessel temperature into ionic species that caused the reactor vessel conductivity to exceed specifications. The RWCU system was removed from service in order to eliminate this source of resins. The resins that accumulated in the vessel were allowed to decompose at vessel temperature into harmless, undetectable, non-ionic substances.
In order te prevent future similar events, an RWCU eyr.luation has been initiated to consider all RWCU problems and implement solutions in the form of repairs and/or modifications where needed. Such factors as system valve leakage and precoating applications are currently under investigation. It is believed this action is appropriate and sufficient in response to this event.
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| 05000325/LER-1981-001, Forwards LER 81-001/01T-0 | Forwards LER 81-001/01T-0 | | | 05000325/LER-1981-001-01, /01T-0:on 810103,feed Pump Tripped on High Vessel Level Due to safety-relief Valve B21-F013G,Model 67F,lift. Caused by High Second Stage & Pilot Leakage in Valve.Pilot Valve Temporarily Replaced Until Next Scheduled Outage | /01T-0:on 810103,feed Pump Tripped on High Vessel Level Due to safety-relief Valve B21-F013G,Model 67F,lift. Caused by High Second Stage & Pilot Leakage in Valve.Pilot Valve Temporarily Replaced Until Next Scheduled Outage | | | 05000324/LER-1981-001, Forwards LER 81-001/03L-0 | Forwards LER 81-001/03L-0 | | | 05000324/LER-1981-001-03, /03L-0:on 810129,during Surveillance Testing, HPCI Sys Initiation Reactor Level Switch Actuated at Simulated Level Above Tech Spec.Caused by Components Slipping Due to Loose Set Screws on Actuator Pointers | /03L-0:on 810129,during Surveillance Testing, HPCI Sys Initiation Reactor Level Switch Actuated at Simulated Level Above Tech Spec.Caused by Components Slipping Due to Loose Set Screws on Actuator Pointers | | | 05000325/LER-1981-002-03, /03L-0:on 810114 & 0212,reactor Protection Sys Logic relays,C71-K3D & K3E,did Not de-energize When MSIV 1-B21-F028B Was Closed.Caused by Sticking Valve Position Limit Switch Actuator Arm Cam.Switch Replaced | /03L-0:on 810114 & 0212,reactor Protection Sys Logic relays,C71-K3D & K3E,did Not de-energize When MSIV 1-B21-F028B Was Closed.Caused by Sticking Valve Position Limit Switch Actuator Arm Cam.Switch Replaced | | | 05000325/LER-1981-002, Forwards LER 81-002/03L-0 | Forwards LER 81-002/03L-0 | | | 05000324/LER-1981-002-03, /03L-0:on 810104,vacuum Breaker X-18A Had Dual open-close Position Indication While in Open Position. Probably Caused by Problem W/Vacuum Breaker Position Limit Switches.Problem Will Be Resolved During Next Outage | /03L-0:on 810104,vacuum Breaker X-18A Had Dual open-close Position Indication While in Open Position. Probably Caused by Problem W/Vacuum Breaker Position Limit Switches.Problem Will Be Resolved During Next Outage | | | 05000324/LER-1981-002, Forwards LER 81-002/03L-0 | Forwards LER 81-002/03L-0 | | | 05000324/LER-1981-003-03, /03L-0:on 810108,suppression Pool Level Exceeded Specs.Caused by Valve Operator Torque Switch Out of Adjustment Allowing Leakage Into Suppression Pool.Switch Repaired | /03L-0:on 810108,suppression Pool Level Exceeded Specs.Caused by Valve Operator Torque Switch Out of Adjustment Allowing Leakage Into Suppression Pool.Switch Repaired | | | 05000324/LER-1981-003, Forwards LER 81-003/03L-0 | Forwards LER 81-003/03L-0 | | | 05000325/LER-1981-003-03, /03L-0:control Rod 26-35 on 810103,18-51 on 810113,38-31 & 22-15 on 810114 Showed Inaccurate Position Indications.Caused by Buffer Card Failure on 26-35;defective Reed Switches in Others.Card Replaced,Switches Repaired | /03L-0:control Rod 26-35 on 810103,18-51 on 810113,38-31 & 22-15 on 810114 Showed Inaccurate Position Indications.Caused by Buffer Card Failure on 26-35;defective Reed Switches in Others.Card Replaced,Switches Repaired | | | 05000325/LER-1981-003, Forwards LER 81-003/03L-0 | Forwards LER 81-003/03L-0 | | | 05000324/LER-1981-004, Forwards LER 81-004/03L-0 | Forwards LER 81-004/03L-0 | | | 05000324/LER-1981-004-03, /03L-0:on 810110,during Startup,Intermediate Range Monitor a Did Not Respond to Changes in Input Signal.Monitor C Indicated Downscale When on Range 7.On 810111 Monitor E Indicated Downscale While Monitor C Still Inoperable | /03L-0:on 810110,during Startup,Intermediate Range Monitor a Did Not Respond to Changes in Input Signal.Monitor C Indicated Downscale When on Range 7.On 810111 Monitor E Indicated Downscale While Monitor C Still Inoperable | | | 05000325/LER-1981-004, Forwards LER 81-004/03L-0 | Forwards LER 81-004/03L-0 | | | 05000325/LER-1981-004-03, /03L-0:on 810118,during Control Rod Operability Check,Pt 14.1,rod 26-07 Would Not Select.Caused by Loose Solder Joint in Rod Select Switch Due to Frequent Use of Switch.New Solder Joint Made | /03L-0:on 810118,during Control Rod Operability Check,Pt 14.1,rod 26-07 Would Not Select.Caused by Loose Solder Joint in Rod Select Switch Due to Frequent Use of Switch.New Solder Joint Made | | | 05000325/LER-1981-005, Forwards LER 81-005/03L-0 | Forwards LER 81-005/03L-0 | | | 05000325/LER-1981-005-03, /03L-0:on 810101,during Normal Surveillance, Discovered Secondary Containment 20 Ft Elevation Inner Air Lock Door Inoperable Due to Missing Gasket Sealing Matl. Caused by High Personnel Traffic.Gasket Replaced | /03L-0:on 810101,during Normal Surveillance, Discovered Secondary Containment 20 Ft Elevation Inner Air Lock Door Inoperable Due to Missing Gasket Sealing Matl. Caused by High Personnel Traffic.Gasket Replaced | | | 05000324/LER-1981-005-03, /03L-0:on 810113,during Normal Surveillance, Secondary Containment 20-ft Elevation Outer Air Lock Personnel Door Found Not Sealing.Caused by Heavy Personnel Traffic Through Door.Gasket Repaired | /03L-0:on 810113,during Normal Surveillance, Secondary Containment 20-ft Elevation Outer Air Lock Personnel Door Found Not Sealing.Caused by Heavy Personnel Traffic Through Door.Gasket Repaired | | | 05000324/LER-1981-005, Forwards LER 81-005/03L-0 | Forwards LER 81-005/03L-0 | | | 05000324/LER-1981-006-03, /03L-0:on 810115,when Main Steam Line Isolation Valve F028C Reopened During Test P.T.1.3.1P-2,main Steam Line C Indicated Min Flow.Cause Undetermined.Investigation Will Be Performed During Future Outage | /03L-0:on 810115,when Main Steam Line Isolation Valve F028C Reopened During Test P.T.1.3.1P-2,main Steam Line C Indicated Min Flow.Cause Undetermined.Investigation Will Be Performed During Future Outage | | | 05000324/LER-1981-006, Forwards LER 81-006/03L-0 | Forwards LER 81-006/03L-0 | | | 05000325/LER-1981-006, Forwards LER 81-006/03L-0 | Forwards LER 81-006/03L-0 | | | 05000325/LER-1981-006-03, /03L-0:on 810101,containment Atmospheric Monitor, 1-CAC-ATH-1259-2 Found Out of Calibr.Caused by Instrument Drift.Monitor Recalibr & Returned to Svc | /03L-0:on 810101,containment Atmospheric Monitor, 1-CAC-ATH-1259-2 Found Out of Calibr.Caused by Instrument Drift.Monitor Recalibr & Returned to Svc | | | 05000324/LER-1981-007, Forwards LER 81-007/03L-0 | Forwards LER 81-007/03L-0 | | | 05000325/LER-1981-007-03, /03L-0:on 810220,observed 2-inch Discrepancy Between Level Indicators of Suppression Pool Level Transmitters 1-CAC-LT-2601 & 2602.Caused by Insufficient Venting of 2602 Transmitter High Side Sensing Line | /03L-0:on 810220,observed 2-inch Discrepancy Between Level Indicators of Suppression Pool Level Transmitters 1-CAC-LT-2601 & 2602.Caused by Insufficient Venting of 2602 Transmitter High Side Sensing Line | | | 05000325/LER-1981-007, Forwards LER 81-007/03L-0 | Forwards LER 81-007/03L-0 | | | 05000324/LER-1981-007-03, /03L-0:on 810115,Group 1 Isolation Signal Received on Reactor Protection Sys Trip Channel B.Caused by Failure of Relay Coil,Model P/N 12HFAS1A49F Due to Insulation Breakdown.Coil Replaced | /03L-0:on 810115,Group 1 Isolation Signal Received on Reactor Protection Sys Trip Channel B.Caused by Failure of Relay Coil,Model P/N 12HFAS1A49F Due to Insulation Breakdown.Coil Replaced | | | 05000325/LER-1981-008-03, /03L-0:on 810106,while Performing Primary Containment Leak Rate Testing of Personnel Airlock Doors, Discovered That Drywell Exterior Airlock Door Leakage Rate Exceeded Limits.Caused by Tubing Fitting Lodged in Door | /03L-0:on 810106,while Performing Primary Containment Leak Rate Testing of Personnel Airlock Doors, Discovered That Drywell Exterior Airlock Door Leakage Rate Exceeded Limits.Caused by Tubing Fitting Lodged in Door | | | 05000325/LER-1981-008, Forwards LER 81-008/03L-0 | Forwards LER 81-008/03L-0 | | | 05000324/LER-1981-009-04, /04T-0:on 810128,radwaste Sys Liquid Effluent Discharge High Range Indicator/Recorder Found to Have Recorded Release Rate Less than Actual,Causing Tech Spec Limit to Be Exceeded.Caused by Loose Mechanical Linkage | /04T-0:on 810128,radwaste Sys Liquid Effluent Discharge High Range Indicator/Recorder Found to Have Recorded Release Rate Less than Actual,Causing Tech Spec Limit to Be Exceeded.Caused by Loose Mechanical Linkage | | | 05000325/LER-1981-009, Forwards LER 81-009/03L-0 | Forwards LER 81-009/03L-0 | | | 05000325/LER-1981-009-03, /03L-0:on 810115,sys Oil Cooler Inlet Isolation Valve 1-E51-F046 Would Not Open from RTGB Resulting in Reactor Core Isolation Cooling Inoperability.Caused by Incorrect Motor Control Ctr Key Lock Switch Position | /03L-0:on 810115,sys Oil Cooler Inlet Isolation Valve 1-E51-F046 Would Not Open from RTGB Resulting in Reactor Core Isolation Cooling Inoperability.Caused by Incorrect Motor Control Ctr Key Lock Switch Position | | | 05000324/LER-1981-009, Forwards LER 81-009/04T-0 | Forwards LER 81-009/04T-0 | | | 05000325/LER-1981-010, Forwards LER 81-010/03L-0 | Forwards LER 81-010/03L-0 | | | 05000325/LER-1981-010-03, /03L-0:on 810120,upon Auto Initiation After Reactor Scram,Rcic Turbine Failed to Accelerate to Idle Speed,Making RCIC Inoperable.Caused by Dirty Contacts in Turbine Steam Inlet Supply Valve 1-E51-F045.Contacts Cleaned | /03L-0:on 810120,upon Auto Initiation After Reactor Scram,Rcic Turbine Failed to Accelerate to Idle Speed,Making RCIC Inoperable.Caused by Dirty Contacts in Turbine Steam Inlet Supply Valve 1-E51-F045.Contacts Cleaned | | | 05000324/LER-1981-010, Forwards LER 81-010/03L-0 | Forwards LER 81-010/03L-0 | | | 05000324/LER-1981-010-03, /03L-0:on 810120,RHR Svc Water Subsys a Suction valve,2-SW-V101,would Not Open Fully.Caused by Two Hex Nuts on Input Shaft of Valve Motor Operator,Model H3BC-SMB-00, Freezing to Shaft.Nuts & Shaft Reworked & Lubricated | /03L-0:on 810120,RHR Svc Water Subsys a Suction valve,2-SW-V101,would Not Open Fully.Caused by Two Hex Nuts on Input Shaft of Valve Motor Operator,Model H3BC-SMB-00, Freezing to Shaft.Nuts & Shaft Reworked & Lubricated | | | 05000324/LER-1981-011-03, /03L-0:on 810120 & 0123,actual Pool Level Determined in Excess of Upper Tech Spec Limit.Caused by Improper Calibr Data & Calibr Procedure Inadequacy.Procedure Revision Underway & Indicators Correctly Calibr | /03L-0:on 810120 & 0123,actual Pool Level Determined in Excess of Upper Tech Spec Limit.Caused by Improper Calibr Data & Calibr Procedure Inadequacy.Procedure Revision Underway & Indicators Correctly Calibr | | | 05000324/LER-1981-011, Forewards LER 81-011/03L-0 | Forewards LER 81-011/03L-0 | | | 05000325/LER-1981-011-03, /03L-0:on 810121,during Routine Shutdown Operation,Seat Leakage Discovered on Reactor Recirculation Sample Inboard Isolation Valve 1-B32-F019.Cause Unknown. Valve Will Be Inspected & Repaired During Next Outage | /03L-0:on 810121,during Routine Shutdown Operation,Seat Leakage Discovered on Reactor Recirculation Sample Inboard Isolation Valve 1-B32-F019.Cause Unknown. Valve Will Be Inspected & Repaired During Next Outage | | | 05000325/LER-1981-011, Forwards LER 81-011/03L-0 | Forwards LER 81-011/03L-0 | | | 05000324/LER-1981-012-03, /03L-0:on 810320,wiring Deficiency Associated W/ Actuation Switch Discovered That Prevented Switch Operation. Caused by Improper Writing of Field Revision to Plant Mods Requiring Installation of Switches | /03L-0:on 810320,wiring Deficiency Associated W/ Actuation Switch Discovered That Prevented Switch Operation. Caused by Improper Writing of Field Revision to Plant Mods Requiring Installation of Switches | | | 05000325/LER-1981-012-03, /03L-0:on 810122,rod 26-35 Did Not Have Position Indication at Position 03 & Rod 34-35 Did Not Have Position Indication at Position 02.Caused by Defective Rod Position Indication Reed Switches.Corrective Maint Will Be Comple | /03L-0:on 810122,rod 26-35 Did Not Have Position Indication at Position 03 & Rod 34-35 Did Not Have Position Indication at Position 02.Caused by Defective Rod Position Indication Reed Switches.Corrective Maint Will Be Completed | | | 05000325/LER-1981-012, Forwards LER 81-012/03L-0 | Forwards LER 81-012/03L-0 | | | 05000324/LER-1981-012, Forwards LER 81-012/03L-0 | Forwards LER 81-012/03L-0 | | | 05000324/LER-1981-013-03, /03L-0:on 810119,HPCI Sys Component Test Tp 9.3.a Could Not Be Completed.Caused by Failed Motor on CST Suction Valve F004.Motor Sent to Svc Contractor to Be Repaired | /03L-0:on 810119,HPCI Sys Component Test Tp 9.3.a Could Not Be Completed.Caused by Failed Motor on CST Suction Valve F004.Motor Sent to Svc Contractor to Be Repaired | | | 05000324/LER-1981-013, Forwards LER 81-013/03L-0 | Forwards LER 81-013/03L-0 | | | 05000325/LER-1981-013, Forwards LER 81-013/03L-0 | Forwards LER 81-013/03L-0 | | | 05000325/LER-1981-013-03, /03L-0:on 810122,rod Worth Minimizer Sys Rod Blocks Were Received W/Proper Adherence to Control Rod Pattern Pull Sheet.Caused by Inadequate Procedures.Rods Pulled to Correct Position | /03L-0:on 810122,rod Worth Minimizer Sys Rod Blocks Were Received W/Proper Adherence to Control Rod Pattern Pull Sheet.Caused by Inadequate Procedures.Rods Pulled to Correct Position | |
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