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Category:ABNORMAL OCCURRENCE REPORTS (SEE ALSO LER & RO)
MONTHYEARML20126F1181975-09-0505 September 1975
AO 50-213/75-3:on 750904,greater than 2 Delta Dissolved Oxygen Alarm Received.Caused by Oxygen Scavanging from Canal Water on Start of Dredging Operation.Backup Sys Started. Monitoring & Grab Sample Results Encl
ML20126F1791974-05-0606 May 1974
AO 74-08:emergency Diesel Generator 2B Caught Fire Before Completion of Monthly Load Test.Caused by Overheating of Field Excitation Transformer & Subsequent Burn in Winding. Transformer Removed Pending Receipt of Replacement
ML20126F1831974-04-0505 April 1974
AO 74-06:containment Penetration P-60 Failed to Meet Acceptable Leak Rate During Routine Surveillance Test. Cause Under Investigation
1975-09-05
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Category:TEXT-SAFETY REPORT
MONTHYEARML20217K3301999-10-19019 October 1999
Safety Evaluation Supporting Amend 195 to License DPR-61
ML20206C8761999-04-28028 April 1999
Safety Evaluation Supporting Amend 194 to License DPR-61
CY-99-047, Ro:On 981217,identified Unsuccessful Dewatering of Cnsi HIC, Model PL8-120R,containing Resins.Caused by Apparent Failure of Dewatering Tree.Other HICs Have Been Procured,Recertified & Returned to Plant for Use1999-03-23023 March 1999
Ro:On 981217,identified Unsuccessful Dewatering of Cnsi HIC, Model PL8-120R,containing Resins.Caused by Apparent Failure of Dewatering Tree.Other HICs Have Been Procured,Recertified & Returned to Plant for Use
ML20206F1971998-12-31031 December 1998
Annual Rept for 1998 for Cyap. with
CY-99-027, Annual Rept for 10CFR50.59, for Jan-Dec 1998.With1998-12-31031 December 1998
Annual Rept for 10CFR50.59, for Jan-Dec 1998.With
ML20198G9101998-12-22022 December 1998
Proposed Rev 2 of Cyap QAP for Haddam Neck Plant. Marked Up Rev 1 Included
ML20238F2131998-08-28028 August 1998
SER Accepting Defueled Emergency Plan for Emergency Planning for Connecticut Yankee Atomic Power Co
CY-98-136, Ro:On 980727,flow Blockage Occurred & Caused Pressure in Sys to Increase,Resulting in Relief Valve Lifting & Pipe Vibration,Which Caused Leaks to Develop.Caused by Nearly Closed post-filter Inlet Valve.Repaired 2 Leaks in Line1998-08-12012 August 1998
Ro:On 980727,flow Blockage Occurred & Caused Pressure in Sys to Increase,Resulting in Relief Valve Lifting & Pipe Vibration,Which Caused Leaks to Develop.Caused by Nearly Closed post-filter Inlet Valve.Repaired 2 Leaks in Line
ML20237B7461998-07-22022 July 1998
1998 Defueled Emergency Plan Exercise Scenario Manual, Conducted on 980722
ML20202D1621998-06-30030 June 1998
Safety Evaluation Supporting Amend 193 to License DPR-61
CY-98-068, Follow-up to Verbal Notification on 980413 of Film on Discharge Canal.Investigation Continuing.Samples Collected for Petroleum Analyses & Biological Characterization at Intake Structure & Discharge Canal.Replaced Sorbent Booms1998-04-15015 April 1998
Follow-up to Verbal Notification on 980413 of Film on Discharge Canal.Investigation Continuing.Samples Collected for Petroleum Analyses & Biological Characterization at Intake Structure & Discharge Canal.Replaced Sorbent Booms
CY-98-045, Ro:On 980212,0219,0225 & 0312,separate Sheens of Approx One Cup of oil-like Substance Was Observed at Discharge Canal. Cause Has Not Been Clearly Identified.Called in Vendor Spill to Install Sorbent Booms to Absorb Sheen.W/One Drawing1998-04-13013 April 1998
Ro:On 980212,0219,0225 & 0312,separate Sheens of Approx One Cup of oil-like Substance Was Observed at Discharge Canal. Cause Has Not Been Clearly Identified.Called in Vendor Spill to Install Sorbent Booms to Absorb Sheen.W/One Drawing
ML20217F0611998-03-31031 March 1998
Historical Review Team Rept
ML20217A0001998-03-31031 March 1998
Monthly Operating Rept for Mar 1998 for Haddam Neck Plant
ML20217K2101998-03-27027 March 1998
Safety Evaluation Supporting Amend 192 to License DPR-61
CY-98-046, Follow-up to 980311 Verbal Notification of Film on Discharge Canal.Cause Not Yet Determined.Film Is Contained & Will Be Absorbed by Containment & Sorbent Booms That Were in Place in Discharge Canal1998-03-12012 March 1998
Follow-up to 980311 Verbal Notification of Film on Discharge Canal.Cause Not Yet Determined.Film Is Contained & Will Be Absorbed by Containment & Sorbent Booms That Were in Place in Discharge Canal
ML20216D6531998-02-28028 February 1998
Monthly Operating Rept for Feb 1998 for Haddam Neck Plant
ML20217D7381998-02-28028 February 1998
Revised MOR for Feb 1998 Haddam Neck Plant
CY-98-012, Monthly Operating Rept for Jan 1998 for Connecticut Yankee Haddam Neck Plant1998-01-31031 January 1998
Monthly Operating Rept for Jan 1998 for Connecticut Yankee Haddam Neck Plant
CY-98-010, Annual Rept for 10CFR50.59,Jan-Dec,19971997-12-31031 December 1997
Annual Rept for 10CFR50.59,Jan-Dec,1997
ML20198N6681997-12-31031 December 1997
Monthly Operating Rept for Dec 1997 for Haddam Neck Plant
ML20217P4861997-12-31031 December 1997
1997 Annual Financial Rept, for Cyap
ML20199L5891997-12-24024 December 1997
Independent Analysis & Evaluation of AM-241 & Transuranics & Subsequent Dose to Two Male Workers at Connecticut Yankee Atomic Power Plant
ML20203K4271997-11-30030 November 1997
Monthly Operating Rept for Nov 1997 for Haddam Neck Plant
ML20199B1141997-10-31031 October 1997
Monthly Operating Rept for Oct 1997 for Haddam Neck Plant
ML20198M8101997-10-14014 October 1997
SER Accepting Proposed Revs to Util Quality Assurance Program at Facility
ML20198J8811997-09-30030 September 1997
Monthly Operating Rept for Sept 1997 for Haddam Neck Plant
ML20210P8721997-08-31031 August 1997
Post Decommissioning Activities Rept, for Aug 1997
ML20217Q3171997-08-31031 August 1997
Addl Changes to Proposed Rev 1 to QA Program
ML20210U9301997-08-31031 August 1997
Monthly Operating Rept for Aug 1997 for Haddam Neck Plant
CY-97-082, Special Rept:On 970708,routine Surveillance Testing of Seismic Monitoring Sys Instrumentation Revealed,Data Was Not Being Reproduced by Portion of Playback Sys.Station Presently Pursuing Replacement of Seismic Monitoring Sys1997-08-14014 August 1997
Special Rept:On 970708,routine Surveillance Testing of Seismic Monitoring Sys Instrumentation Revealed,Data Was Not Being Reproduced by Portion of Playback Sys.Station Presently Pursuing Replacement of Seismic Monitoring Sys
ML20210L0521997-07-31031 July 1997
Monthly Operating Rept for July 1997 for HNP
ML20149E4451997-06-30030 June 1997
Monthly Operating Rept for June 1997 for Haddam Neck Plant
ML20141A0041997-05-31031 May 1997
Independent Assessment of Radiological Controls Program at Cyap Haddam Neck Plant Final Rept May 1997
ML20140H5241997-05-31031 May 1997
Monthly Operating Rept for May 1997 for Haddam Neck Plant
ML20141K4201997-05-22022 May 1997
Safety Evaluation Supporting Amend 191 to License DPR-61
ML20141D4141997-04-30030 April 1997
Monthly Operating Rept for Apr 1997 for Connecticut Yankee Haddam Neck
ML20138G5901997-04-25025 April 1997
Proposed Rev 1 to Cyap QA Program for Haddam Neck Plant
ML20137W8051997-03-31031 March 1997
Monthly Operating Rept for Mar 1997 for Haddam Neck Plant
ML20137H3031997-03-31031 March 1997
Rev 2 to Nuclear Training Loit/Lout Audit Reviews
ML20137C6281997-03-14014 March 1997
Redacted Version of Rev 1 to Nuclear Training Loit/Lout Audit Reviews
ML20137A0801997-02-28028 February 1997
Monthly Operating Rept for Feb 1997 for Haddam Neck Plant
ML20135C5101997-02-26026 February 1997
1996 Refuel Outage ISI Summary Rept for CT Yankee Atomic Power Co
B16268, Special Rept:On 970205,declared Main Stack-Wide Range Noble Gas Monitor Inoperable.Caused by Inadequate Calibr Methods. Will Revise Calibr Procedure to Technique to Demonstrate Accuracy & Linearity Over Intended Range of Monitor1997-02-19019 February 1997
Special Rept:On 970205,declared Main Stack-Wide Range Noble Gas Monitor Inoperable.Caused by Inadequate Calibr Methods. Will Revise Calibr Procedure to Technique to Demonstrate Accuracy & Linearity Over Intended Range of Monitor
ML20135E3221997-02-13013 February 1997
Independent Review Team Rept 1996 MP -1 Lout NRC Exam Failures
ML20134L2751997-02-0303 February 1997
Draft Rev to GPRI-30, Spent Fuel Storage Facility Licensing Basis/Design Basis
ML20138K5721997-01-31031 January 1997
Monthly Operating Rept for Jan 1997 for Haddam Neck Plant.W/
ML20134L2791997-01-10010 January 1997
Rev 0 to QA Program Grpi
ML20134L2911997-01-0808 January 1997
Rev 0 to UFSAR Rev Grpi
ML20134L2721996-12-31031 December 1996
Commitment Mgt Grpi
1999-04-28
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Text
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Agulatorf N D' t 4
- CONNECTICUT YANKEE AT O M IC POWER COMPANY
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April 5,1974 CYH-2628 DOCKET 50-213 - ._ , ,,
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14r. James P. O'Reilly, Director { V 'Q(/7-% i Region 1 , . ,
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U. S. Atomic Energy Commission 631 Park Avenue .c w
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- g, Dear lir. O'Reilly; &-
4 As defined by Technical Specifications for Connecticut Yankee w -) r Atomic Power Station, Section 5.3, the following information involving [
the failure of a containment penetration to meet an acceptable leak rate during a routine periodic surveillance leak rate test is reported as Abnormal Occurrence 74-6.
~
Following a periodic leak rate test of containment penetration '
P-60 (component cooling water supply to the neutron shield tank cooler) calculations indicated a leak rate in excess of that allowed.
This test involves the measurement of any water leaking back through a check valve installed in the nornal cooling water supply line to l the neutron shield tank while pressurized to containment design pressure of 40 psig.
An investigation into the cause of the excess leakage through J the check valve is being conducted and a written report will be submitted within ten days.
' Very truly yours, j, a. J u &
'F. W. ' Hartley // L W" i Plant Superintendent D APR 201974 fj i J. un go. tant. mun ) \
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