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Category:ABNORMAL OCCURRENCE REPORTS (SEE ALSO LER & RO)
MONTHYEARML20151C1931975-12-19019 December 1975 AO 20-75:on 751218,30-inch Ventilation Pipe Contacted by Power Showel During Const Activity.Caused by Inadequate Administrative Controls Re Preparation & Review of Const Activity.Work Activity Stopped.Engineering Review Requested ML20151C1951975-11-0606 November 1975 AO 24-75:in Jul 1975,design Analysis Not Done for Addition of Breaker & New Security Sys Load to safety-related 480 Volt Bus 2A.Caused by Administrative Control Failure.Circuit Design Analysis Requested to Justify Circuit Configuration ML20151C2041975-07-23023 July 1975 AO 17-75:on 750718,daily Discharge Canal Water Sample Not Taken & Analyzed Per Tech Specs Requirements.Caused by Personnel Failure to Perform Routine Duty.Technicians Informed of Deficiency.Adherence to Requirements Stressed ML20151C2301975-05-30030 May 1975 AO 15-75:on 750530,fuel Pool & Reactor Drain Valve CV/4027 Found Leaking During Isolation Valve Integrity Testing.Cause Being Investigated ML20151C2281975-05-28028 May 1975 AO 14-75:on 750526,excessive Leakage Noted During Monthly Containment Ventilation Supply Valve Leak Test.Cause Not Known.Test Terminated & Reported to Plant Mgt.Investigation in Progress ML20151C2251975-05-24024 May 1975 AO 13-75:on 750523,locknut on MO/7053 Found Loose.Caused by Design Deficiency.Locknut Tightened & Staked to Drive Sleeve.Investigation in Progress to Determine Other Corrective Measures ML20151C2201975-05-23023 May 1975 AO 12-75:on 750521,excessive Operator Freeplay Noted Due to Loose Locknut on Core Spray Valve Operator.Caused by Design Deficiency.Locking Nut Tightened & Staked W/Pin Punch to Drive Sleeve.Investigation in Progress ML20151C2151975-05-21021 May 1975 AO 11-75:on 750520,during Calibr of Vacuum Interlock Switch PS/RE15B,setpoint Found Above Tech Specs Limits.Caused by Misapplication.Wide Range Switch Used W/Setpoint at Extreme Low End.Switch Restrictive Reset Characteristic Is Limiting 1975-07-23
[Table view] Category:TEXT-SAFETY REPORT
MONTHYEARML20217C3031999-09-28028 September 1999 Annual Rept of Facility Changes,Tests & Experiments ML20199A6621999-01-0505 January 1999 Special Rept:On 981230,hi Range Noble Gas Monitor Was Inoperable for Greater than Seven Days.Cause Unknown. Preplanned Alternate Method of Monitoring Appropriate Parameters within 72 H Was Established ML20206F6131998-12-31031 December 1998 1998 Consumers Energy Co Annual Rept. with ML20198K6611998-12-24024 December 1998 Safety Evaluation Supporting Amend 120 to License DPR-6 ML20154E0371998-09-30030 September 1998 Safety Evaluation Accepting Request for Exemption from Certain Portions of 10CFR50.47(b) & App E to 10CFR50 to Allow Brpnp to Discontinue Offsite EP Activities & Reduce Scope of Onsite EP as Result of Permanently Shutdown ML20154E0581998-09-30030 September 1998 Safety Evaluation Accepting Licensee Request from Exemption from Certain Portions of 10CFR50.47(b) ML20198K0091998-09-18018 September 1998 SER Accepting Licensee Request for Exemption from Certain 10CFR50 Requirements for Emergency Planning for Big Rock Nuclear Plant ML20217N2131998-04-24024 April 1998 Brpnp Zircaloy Oxidation Analysis ML20216K0011998-04-16016 April 1998 Safety Evaluation Approving Licensee Request Re Plant Training Program for Certified Fuel Handlers ML20217H4641998-03-26026 March 1998 Rev 2 to Post Shutdown Decommissioning Activities Rept (Psdar) ML20202G1941998-02-12012 February 1998 Rev 7 to Updated Final Hazards Summary Rept for Big Rock Point Plant ML20154A7591997-10-0808 October 1997 10CFR50.59 Annual Rept of Facility Changes,Tests & Experiments, Since 971008 ML20216E4731997-08-31031 August 1997 Monthly Operating Rept for Aug 1997 for Big Rock Point Plant ML20141J8731997-08-14014 August 1997 Safety Evaluation Supporting Amend 119 to License DPR-6 ML20210H5601997-07-31031 July 1997 Monthly Operating Rept for July 1997 for Brpnp ML20148T4901997-06-30030 June 1997 Monthly Operating Rept for June 1997 for Big Rock Point Nuclear Plant ML20148N9251997-06-0606 June 1997 Rev 18 to CPC-2A, Quality Program Description for Operational Nuclear Plants ML20140C8981997-05-31031 May 1997 Monthly Operating Rept for May 1997 for Big Rock Nuclear Power Plant ML20138J0121997-04-30030 April 1997 Monthly Operating Rept for Apr 1997 for Big Rock Point ML20137X0161997-04-18018 April 1997 Safety Evaluation Accepting Changes to Rev 17 of CPC Quality Program Description for Operational NPPs (CPC-2A) ML20137J9381997-04-0202 April 1997 Safety Evaluation Supporting Amend 118 to License DPR-6 ML20137P0391997-03-31031 March 1997 Monthly Operating Rept for Mar 1997 for Big Rock Point Nuclear Plant ML20135F2361997-02-28028 February 1997 Monthly Operating Rept for Feb 1997 for Big Rock Nuclear Plant ML20148N9181997-02-0101 February 1997 Rev 17 to CPC-2A, Quality Program Description for Operational Nuclear Plants ML20134H3691997-01-31031 January 1997 Monthly Operating Rept for Jan 1997 for Big Rock Point Nuclear Plant ML20137F2101996-12-31031 December 1996 1996 Annual Financial Rept CMS Energy ML20133C5421996-12-31031 December 1996 Monthly Operating Rept for Dec 1996 for Big Rock Point Nuclear Plant ML20135E5101996-11-30030 November 1996 Monthly Operating Rept for Nov 1996 for Big Rock Point Nuclear Plant ML20134H3381996-10-31031 October 1996 Monthly Operating Rept for Oct 1996 for Big Rock Point Nuclear Plant ML20211N1561996-10-0808 October 1996 Annual Rept of Facility Changes,Tests & Experiments, Consisting of Mods & Miscellaneous Changes Performed Since 961008 ML20128F9821996-09-30030 September 1996 Monthly Operating Rept for Sept 1996 for Big Rock Point Nuclear Plant ML20059E8321993-12-31031 December 1993 Monthly Operating Rept for Dec 1993 for Big Rock Point Nuclear Plant ML20058K0931993-11-30030 November 1993 Monthly Operating Rept for Nov 1993 for Big Rock Point Nuclear Plant ML20058E8961993-11-29029 November 1993 1993 ISI Rept 3-1 Big Rock Point Plant, for 930626-0905 ML20058F3441993-11-22022 November 1993 Safety Evaluation Concurring W/Contractor Findings Presented in Technical Evaluation Rept EGG-RTAP-10816, Evaluation of Utility Responses to Suppl 1 to NRC Bulletin 90-01;Big Rock Point ML20058G5981993-11-17017 November 1993 Part 21 Rept Re Westronics Recorders,Model 2100C.Signal Input Transition Printed Circuit Board Assembly Redesigned to Improve Recorder Immunity to Electromagnetic Interference.List of Affected Recorders & Locations Encl ML20058A1601993-11-15015 November 1993 Safety Evaluation Supporting Amend 112 to License DPR-6 ML20059J4531993-10-31031 October 1993 Monthly Operating Rept for Oct 1993 for Big Rock Point Nuclear Plant ML20057G1511993-10-0707 October 1993 Part 21 Rept Re Westronics Model 2100C Series Recorders. Informs That Over Several Tests,Observed That Recorder Would Reset During Peak Acceleration & Door Being Forced Off Recorder.Small Retaining Clips Added to Bottom of Door ML20057E1981993-10-0505 October 1993 Safety Evaluation Supporting Amend 111 to License DPR-6 ML20057E8341993-09-30030 September 1993 Monthly Operating Rept for Sept 1993 for Big Rock Point Nuclear Plant ML20056G9171993-08-31031 August 1993 Monthly Operating Rept for Aug 1993 for Big Rock Point Nuclear Plant ML20056E5171993-08-31031 August 1993 Technical Review Rept, Tardy Licensee Actions ML20056E1661993-08-16016 August 1993 Safety Evaluation Supporting Amend 110 to License DPR-6 ML18058B8821993-06-15015 June 1993 Rev 13 to Quality Program Description for Operational Nuclear Power Plants. ML20128P5501993-02-18018 February 1993 Section 2.5 of Big Rock Point Updated Final Hazards Summary Rept ML20128F3511993-01-31031 January 1993 Monthly Operating Rept for Jan 1993 for Big Rock Point Nuclear Plant ML20128C4341993-01-29029 January 1993 Forwards Rev 3 to Updated Final Hazards Summary Rept ML20058L8721992-12-31031 December 1992 1992 Annual Rept,Cpc ML20127K8941992-12-31031 December 1992 Revised Pages to Graybook Rept for Dec 1992 for Big Rock Point Nuclear Plant 1999-09-28
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THIS TWX IS TO CONFIRM AN EVENT REPORTED BY TELEPHONE D E DE HOOR ( ;
TO O KILEY AT 1500 HOURS ON HAY _23, 1975 l
- 1. REPORT NO - A0-13-75 DOCKET 155 (
2A. REPORT DATE ,MAY 23, 1975 26 OCCURRENCE DATE - MAY 2 3', 1975 C
3 FACILITY- BIG ROCK POINT PLANT 4 IDENTIFICATION OF OCCURRENCE- EME'RGENCY CONDENSER OUTLET VALVE OPERATOR LOCKNUT LOOSE.
5 CON 01TIONS PRIOR TO OCCURRENCE- PLANT IN COLD SHUTDOWN.
6 DESCRIPTION OF OCCURRENCE- FOLLOWING SIHILAR FAILURES OF LOCKNUT ,
ON OTHER VALVES OF THE SAME MANUFACTURER - A0-12-75 ON MAY 21, 1975 THIS VALVE WAS.BEING INSPECTED TO DETERMINE IF A SIMILAR CONDITION t EXIS1ED ON THE OPERAT04 DRIVE HECHANISM. THE LOCKNUT ON M0/7053 WAS (
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'FOUND LUDSE AND WAS TIGHTENED AND.SiAKED ON MAY 23, 1975,
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- 7. DESIGNATI0h 0F APPARENT CAUSE OF OCCURRENCE- DESIGN
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i B. ANALYSIS OF OCCURRENCE- THE VALVE DID NOT FAIL TO OPERATE AND 0 0 3 // W / 4
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[ j THUS NO MAZAw0 EXISTED, A HYPOTHETICAL FAILURE WOULD PREVENT ONE OF TWO LOOPS OF THE EMERGENCY TO BE OPERABLE DURING AN OVERPRESSURE C t> OCCURRLNCE.
9 CORRECTIVE ACTION- THE LOCKING NUT WAS TIGHTENED AND STAKE 0 TO i-INVESTIGATION IS IN PROGRESS TO DETERMINE IF OTHER C ,
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COPRECTIVE MEASURES ARE NECESSARY.
FAILURE DATA- MANUAFCTURED BY PMILADELPHIA GEAR
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