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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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Re-ulfitory Fi'a Cy.
. O!4NECTICUT YANKEE AT O M I C POWER COMPANY i, / H ADDAM NECK PLANT j ;
(%' ...g RR # 1. DOX 127C. EAST H AMPTON, CONN. oG4?A May 6, 1974 CYli-2GGO ,. c.-
Mr. James P. O'Reilly, Director ,
Region 1 < I Directorate of Regulatory Operations s /
b fl4PS Ad[ ?.
U. S. Atomic Energy Consnission 631 Park Avenue 50-21 3
King of Prussia, Pennsylvania 1940G *
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Dear Mr. O'Reilly; 3
=e As defined by Technical Specifications for Connecticut Yankee Atomic Power Station, Section 5.3, the following infonnation involving failure of the 2B Emergency Diesel Generator during a routine monthly surveillance test is hereby reported as abnonnal occurrence 74-8.
Shortly before the completion of the monthly load test of 2B Emergency Diesel Generator as required by Section 4.5A of the Technical Specification, smoke was observed coming from the associated control console. The test run was suspended and the diesel unit shutdown. CO2 was dischargad into the console to extinguish any ignited material.
Investigation revealed that one of the three field excitation transfonaers (one per phase) had overheated and burned a hole in the transfonaer winding approximately one and one-half inches in diameter.
Damage was also indicated in the connecting wiring for the affected transfonner.
The affected transfonner was removed pending receipt of a replacement.
The remaining two transionners were removed and tested satisfactorily.
Necessary replacements and wiring repair will be accomplished promptly.
An investiqation of the failure cause is continuing with the Vendor.
The remaininq Emergency Diesel Generator will be operatec; in accordance with the lechnical Specifications pending repair completion. A final report will he submitted within ten days.
Very truly yours, 1 .y
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