Forwards LER 78-047/03L-0
Person / Time
ML19256A875
Site:	Calvert Cliffs
Issue date:	01/11/1979
From:	Russell L BALTIMORE GAS & ELECTRIC CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19256A876	List: 05000318/LER-1978-047, Forwards LER 78-047/03L-0 05000318/LER-1978-047-03, /03L-0 on 781213:refueling Water Tank Narrow Range Level Indicator (Lia 4142) Was Out of Calibr & Tank Level Was Too Low.Caused by Malfunctioning Power Supply Model TA4552
References
NUDOCS 7901160262
Download: ML19256A875 (1)
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LER-1978-047, Forwards LER 78-047/03L-0

Event date:
Report date:
3181978047R00 - NRC Website
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N, O

B ALTIMORE G AS AND ELECTRIC COMPANY P.O. D O X 14 7 5 D A LTIMO R E. M A R YL A N D 21203 ELECTRIC PRODUCTION DEPARTMENT sy.

ARYLAND 2 37 January ll,1979 Mr. Boyce H. Grier, Director Docket No. 50-318 Office of Inspection and Enforcement License No. DPR-69 U.S. Nuclear Reculatory Commission Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 1

Dear Mr. Grier:

Per Technical Specification 6.9.1.9.b, please find attached the thirty-day report for LER 78-47/3L.

I Should you have any questions regarding this report, we would be pleased to discuss them with you.

k Very truly yours, k

o L. B. Russell Chief Engineer p

LBR/KMR/dds Attachment Copy To: Director, Office of lianagement Infomation and Program Control Messrs. A. E. Lundvall, Jr.

J. B. Bullock 4~

a t

Licensee Event Report

Calvert Cliffs

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		Reporting criterion
05000317/LER-1978-001, Forwards LER 78-001/03L-0	Forwards LER 78-001/03L-0
05000317/LER-1978-001-03, /03L-0 on 771210:azimuthal Power Tilt Exceeded Tech Specs Limits.Caused by Positive Bias Being Estimated Slightly Below Value of 0.020.Proposed Tech Spec Change Submitted to Permit Use of Addl Incore Detector Segments	/03L-0 on 771210:azimuthal Power Tilt Exceeded Tech Specs Limits.Caused by Positive Bias Being Estimated Slightly Below Value of 0.020.Proposed Tech Spec Change Submitted to Permit Use of Addl Incore Detector Segments
05000317/LER-1978-023, Forwards LER 78-023/03L-0	Forwards LER 78-023/03L-0
05000317/LER-1978-023-03, /03L-0 on 780906:failure of Containment Atmosphere Particulate Monitor Due to Moisture from Condensation & Some Corrosion;Caused by High Ambient Containment Humidity & Subsequent Condensation Inside Detector Pig	/03L-0 on 780906:failure of Containment Atmosphere Particulate Monitor Due to Moisture from Condensation & Some Corrosion;Caused by High Ambient Containment Humidity & Subsequent Condensation Inside Detector Pig
05000318/LER-1978-030-03, /03L-0 on 780828:discovered Control Element Assembly Motion Inhibit Not Operable for Position Deviation. Caused by Bad K2 Relay on Relay Card.Relay Replaced & Motion Inhibit Returned to Svc	/03L-0 on 780828:discovered Control Element Assembly Motion Inhibit Not Operable for Position Deviation. Caused by Bad K2 Relay on Relay Card.Relay Replaced & Motion Inhibit Returned to Svc
05000318/LER-1978-030, Forwards LER 78-030/03L-0	Forwards LER 78-030/03L-0
05000318/LER-1978-033-03, /03L-0:on 780924,while Filling Refueling Pool from Refueling Water Tank,Rcs Actuated & Tripped Both LPSI Pumps. Caused by Incorrect Calibr of Sigma Instrument Level Indicator 2-LI-4143	/03L-0:on 780924,while Filling Refueling Pool from Refueling Water Tank,Rcs Actuated & Tripped Both LPSI Pumps. Caused by Incorrect Calibr of Sigma Instrument Level Indicator 2-LI-4143
05000318/LER-1978-033, Forwards LER 78-033/03L-0	Forwards LER 78-033/03L-0
05000318/LER-1978-034, Forwards LER 78-034/03L-0	Forwards LER 78-034/03L-0
05000318/LER-1978-034-03, /03L-0 on 781023: in Mode 3 at 500F,12 Main Steam Safety Valve Relief Set Points Were Outside Tolerances of TS 4.7.1;all Were Adjusted & Setpoints Returned to Spec	/03L-0 on 781023: in Mode 3 at 500F,12 Main Steam Safety Valve Relief Set Points Were Outside Tolerances of TS 4.7.1;all Were Adjusted & Setpoints Returned to Spec
05000318/LER-1978-035, Forwards LER 78-035/01T-0	Forwards LER 78-035/01T-0
05000318/LER-1978-035-01, /01T-0:on 781017,air Binding of LPSI Pumps Resulted When Air Being Used to Transfer Purification Sys Resin Leaked Into SDC Sys.Operating Instructions Will Be Revised	/01T-0:on 781017,air Binding of LPSI Pumps Resulted When Air Being Used to Transfer Purification Sys Resin Leaked Into SDC Sys.Operating Instructions Will Be Revised
05000318/LER-1978-036-01, /01T-0 on 781023:during Routine Test of Steam Generator Isolation Signal logic,21 Main Steam Isolation Valve Failed to Shut Upon Sgisa & Sgisb Signal or Hand Switch in Control Room,Due to Sticking MSIV Solenoid Valves	/01T-0 on 781023:during Routine Test of Steam Generator Isolation Signal logic,21 Main Steam Isolation Valve Failed to Shut Upon Sgisa & Sgisb Signal or Hand Switch in Control Room,Due to Sticking MSIV Solenoid Valves
05000318/LER-1978-036, Forwards LER 78-036/01T-0	Forwards LER 78-036/01T-0
05000318/LER-1978-037, Forwards LER 78-037/03L-0	Forwards LER 78-037/03L-0
05000318/LER-1978-037-03, /03L-0 on 781025:during Oper,Reactor Protec Instru Wide Range Logarithmic Neutron Flux Monitor Channel a Read 2 Decades Lower than Other Channels,Due to Connector,For Channel a Not Being Dried Completely When Recently Cleane	/03L-0 on 781025:during Oper,Reactor Protec Instru Wide Range Logarithmic Neutron Flux Monitor Channel a Read 2 Decades Lower than Other Channels,Due to Connector,For Channel a Not Being Dried Completely When Recently Cleaned
05000318/LER-1978-038-01, /01t-0 on 781025:during LPPT in Mode 2,containment Air Lock Was Opened to Repair Failed Oper Mechanism & Was Kept Ajar,Due to Misunderstanding Between Supervisor & Maintenance Personnel.All Personnel Have Been Reinstructed	/01t-0 on 781025:during LPPT in Mode 2,containment Air Lock Was Opened to Repair Failed Oper Mechanism & Was Kept Ajar,Due to Misunderstanding Between Supervisor & Maintenance Personnel.All Personnel Have Been Reinstructed
05000318/LER-1978-038, Forwards LER 78-038/01T-0	Forwards LER 78-038/01T-0
05000318/LER-1978-039-03, /03L-0 on 781115:during Normal Oper Periodic Water Inventory Balance Indicated That Unidentified Reactor Coolant Leakage Was 1.72 Gpm at 0600.Leak Identified as Cracked Weld	/03L-0 on 781115:during Normal Oper Periodic Water Inventory Balance Indicated That Unidentified Reactor Coolant Leakage Was 1.72 Gpm at 0600.Leak Identified as Cracked Weld
05000318/LER-1978-039, Forwards LER 78-039/03L-0	Forwards LER 78-039/03L-0
05000318/LER-1978-040, Forwards LER 78-040/03L-0	Forwards LER 78-040/03L-0
05000318/LER-1978-040-03, /03L-0 on 781117: 5 Halon sub-sys Discharged When Door to 22 Inverter Was Open.Caused by Thermal Detector Being Overly Sensitive to Rate of Rise of Temp.When Door Opened,Internal Airflow Disturbed,Setting Off Detector	/03L-0 on 781117: 5 Halon sub-sys Discharged When Door to 22 Inverter Was Open.Caused by Thermal Detector Being Overly Sensitive to Rate of Rise of Temp.When Door Opened,Internal Airflow Disturbed,Setting Off Detector
05000318/LER-1978-041, Forwards LER 78-041/03L-0	Forwards LER 78-041/03L-0
05000318/LER-1978-041-03, /03L-0 on 781115:RWT Level Discovered to Be at 455 Inches.Caused by Rad-Chem Technicians Failure to Fully Close Local Sample Valve After Drawing Routine Sample. Technician Has Been Reinstructed in Valve Sampling	/03L-0 on 781115:RWT Level Discovered to Be at 455 Inches.Caused by Rad-Chem Technicians Failure to Fully Close Local Sample Valve After Drawing Routine Sample. Technician Has Been Reinstructed in Valve Sampling
05000318/LER-1978-042, Forwards LER 78-042/03L-0	Forwards LER 78-042/03L-0
05000318/LER-1978-042-03, /03L-0 on 781212:number of Operable Charging Pumps Reduced to One Less than Number Required by Tech Specs. Caused by Packings of 2 Charging Pumps Reaching Their Natural End of Life Simultaneously	/03L-0 on 781212:number of Operable Charging Pumps Reduced to One Less than Number Required by Tech Specs. Caused by Packings of 2 Charging Pumps Reaching Their Natural End of Life Simultaneously
05000318/LER-1978-043-03, /03L-0 on 781126:during Monthly Surveillance Test CEA 3 Dropped to Bottom of Core at 0049.Pwr Reduced to 70% Per Tech Specs Until CEA 3 Was Restored to Its Group Position at 0158	/03L-0 on 781126:during Monthly Surveillance Test CEA 3 Dropped to Bottom of Core at 0049.Pwr Reduced to 70% Per Tech Specs Until CEA 3 Was Restored to Its Group Position at 0158
05000318/LER-1978-043, Forwards LER 78-043/03L-0	Forwards LER 78-043/03L-0
05000317/LER-1978-043-04, /04T-0 on 780912:approximately 6200 Menidia (Atlantic Silversides) Were Collected Between 0900 & 1000 Hours from U-1 Travelling Screens.Studies After 1000 Hours Did Not Reveal Any Unusual Numbers of Impinged Fish	/04T-0 on 780912:approximately 6200 Menidia (Atlantic Silversides) Were Collected Between 0900 & 1000 Hours from U-1 Travelling Screens.Studies After 1000 Hours Did Not Reveal Any Unusual Numbers of Impinged Fish
05000317/LER-1978-043, Forwards LER 78-043/04T-0	Forwards LER 78-043/04T-0
05000318/LER-1978-044-03, /03L-0 on 781203:reactor Protection Sys Channel C T-cold Was Erratic & Read Approx 4 F Higher than Pressure Other Channels.Caused by Bad Delta T-thermal Margin/Low Pressure Calculator Mode Switch	/03L-0 on 781203:reactor Protection Sys Channel C T-cold Was Erratic & Read Approx 4 F Higher than Pressure Other Channels.Caused by Bad Delta T-thermal Margin/Low Pressure Calculator Mode Switch
05000318/LER-1978-044, Forwards LER 78-044/03L-0	Forwards LER 78-044/03L-0
05000317/LER-1978-044, Forwards LER 78-044/03L-0	Forwards LER 78-044/03L-0
05000317/LER-1978-044-03, /03L-0:on 780923,during post-maint Test on Spent Fuel Pool 12,exhaust Flow Rate Found Less than Required by Tech Specs.Caused by Discharge Damper Leakage	/03L-0:on 780923,during post-maint Test on Spent Fuel Pool 12,exhaust Flow Rate Found Less than Required by Tech Specs.Caused by Discharge Damper Leakage
05000318/LER-1978-045, Cancelled	Cancelled
05000317/LER-1978-045, Forwards LER 78-045/03L-0	Forwards LER 78-045/03L-0
05000317/LER-1978-045-03, /03L-0 on 780926:Voltage Deviated Greater than 1.0 Volts for Channel Zd from Other Channels,Caused by Nonlinear Isolation Transformer 1-E/E-1013A W/Excessive A/C Ripple & Output Voltage .2V High	/03L-0 on 780926:Voltage Deviated Greater than 1.0 Volts for Channel Zd from Other Channels,Caused by Nonlinear Isolation Transformer 1-E/E-1013A W/Excessive A/C Ripple & Output Voltage .2V High
05000317/LER-1978-046-04, /04L-0 on 780908:radioactive Liquid Waste Release Rate Exceeded 1.25 Curies Per Quarter on 780908 Change Has Been Submitted to Change Tech Specs Section 4.6.2c to Requirements in Section 2.3.A.7	/04L-0 on 780908:radioactive Liquid Waste Release Rate Exceeded 1.25 Curies Per Quarter on 780908 Change Has Been Submitted to Change Tech Specs Section 4.6.2c to Requirements in Section 2.3.A.7
05000317/LER-1978-046, Forwards LER 78-046/04L-0	Forwards LER 78-046/04L-0
05000318/LER-1978-046-03, /03L-0 on 781217:during Surveillance,Noted That Control Element Assembly 18 Would Not Electrically Drive Down in Manual Individual or Manual Group.Caused by Inoperable Timer for Assembly	/03L-0 on 781217:during Surveillance,Noted That Control Element Assembly 18 Would Not Electrically Drive Down in Manual Individual or Manual Group.Caused by Inoperable Timer for Assembly
05000318/LER-1978-046, Forwards LER 78-046/03L-0	Forwards LER 78-046/03L-0
05000317/LER-1978-047, Forwards LER 78-047/03L-0	Forwards LER 78-047/03L-0
05000317/LER-1978-047-03, /03L-0:on 781010,13 Kv Breaker 252-2104 Tripped open,de-energizing 12 Kv Svc Bus 21.Caused by Signal of Unknown Source	/03L-0:on 781010,13 Kv Breaker 252-2104 Tripped open,de-energizing 12 Kv Svc Bus 21.Caused by Signal of Unknown Source
05000318/LER-1978-047, Forwards LER 78-047/03L-0	Forwards LER 78-047/03L-0
05000318/LER-1978-047-03, /03L-0 on 781213:refueling Water Tank Narrow Range Level Indicator (Lia 4142) Was Out of Calibr & Tank Level Was Too Low.Caused by Malfunctioning Power Supply Model TA4552	/03L-0 on 781213:refueling Water Tank Narrow Range Level Indicator (Lia 4142) Was Out of Calibr & Tank Level Was Too Low.Caused by Malfunctioning Power Supply Model TA4552
05000318/LER-1978-048-03, /03L-0 on 781213:22B Safety Injection Tank (SIT) Pressure Was Less than 200 Psig Required by Tech Spec.3 Redundant SITs Remained Operable.Caused by Minor Valve Leakage.Corrective Action:Tank Repressurized	/03L-0 on 781213:22B Safety Injection Tank (SIT) Pressure Was Less than 200 Psig Required by Tech Spec.3 Redundant SITs Remained Operable.Caused by Minor Valve Leakage.Corrective Action:Tank Repressurized
05000317/LER-1978-048, Forwards LER 78-048/03L-0	Forwards LER 78-048/03L-0
05000317/LER-1978-048-03, /03L-0:on 781017,while Moving Group 5 Control Element Assemblies (Cea),Cea 36 Dropped from full-out Position.Caused by Spike in 15-volt Power Supply.Mod to Improve Sys Reliability Under Review	/03L-0:on 781017,while Moving Group 5 Control Element Assemblies (Cea),Cea 36 Dropped from full-out Position.Caused by Spike in 15-volt Power Supply.Mod to Improve Sys Reliability Under Review
05000318/LER-1978-048, Forwards LER 78-048/03L-0	Forwards LER 78-048/03L-0
05000318/LER-1978-049-03, /03L-0 on 781225:during Normal Operation,Cracked Weld Was Found on Suction Line of 23 Reactor Cooling Pump, Due to Crack in Charging Pump Suction Line Pumping	/03L-0 on 781225:during Normal Operation,Cracked Weld Was Found on Suction Line of 23 Reactor Cooling Pump, Due to Crack in Charging Pump Suction Line Pumping
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05000318/LER-1978-047, Forwards LER 78-047/03L-0

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Dear Mr. Grier:

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