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Category:REPORTABLE OCCURRENCE REPORT (SEE ALSO AO
MONTHYEARML20041B3251982-02-0909 February 1982 Ro:On 820111,unit Tripped Due to Freezing of Steam Generator Pressure Sensing Lines.Analysis of Reactor Coolant Sample Showed Activity of 1.01 Uci Dose Equivalent I-131.Later Sample Showed 0.935 Uci Dose Equivalent ML20038A6961981-11-10010 November 1981 Special 30-day Rept Re 811010 Overpressure Mitigating Sys Event.Operators Will Be Instructed in Importance of Meeting & Maintaining Conditions Specified in Test Procedure ML20009D6391981-07-16016 July 1981 Ro:On 810715,util Review Committee Met to Consider Info Received on 810714 from Bechtel Re Investigation of Masonry Walls,Per IE Bulletin 80-11.Stresses in Walls of Control Room Exceeded Revised Acceptance Criteria Limits ML19269F0781979-11-16016 November 1979 Four ROs on 710413,0205,731013 & 740427 Re Partial & Total Losses of Offsite Power.Caused by Wiring Errors & Weather Conditions.No Voltage or Frequency Problems Occurred ML19309A4571975-12-30030 December 1975 RO 50-266/75-18:on 751217,during Facility Refueling,Failed Fuel Assembly Discovered on D-03 Fuel Rods.Caused by Water Impingement Through Baffle Plate While Failed Assembly Was in Cycle 2 Position H-1.Thorough Insp Program Is Underway 1982-02-09
[Table view] Category:LER)
MONTHYEARML20041B3251982-02-0909 February 1982 Ro:On 820111,unit Tripped Due to Freezing of Steam Generator Pressure Sensing Lines.Analysis of Reactor Coolant Sample Showed Activity of 1.01 Uci Dose Equivalent I-131.Later Sample Showed 0.935 Uci Dose Equivalent ML20038A6961981-11-10010 November 1981 Special 30-day Rept Re 811010 Overpressure Mitigating Sys Event.Operators Will Be Instructed in Importance of Meeting & Maintaining Conditions Specified in Test Procedure ML20009D6391981-07-16016 July 1981 Ro:On 810715,util Review Committee Met to Consider Info Received on 810714 from Bechtel Re Investigation of Masonry Walls,Per IE Bulletin 80-11.Stresses in Walls of Control Room Exceeded Revised Acceptance Criteria Limits ML19269F0781979-11-16016 November 1979 Four ROs on 710413,0205,731013 & 740427 Re Partial & Total Losses of Offsite Power.Caused by Wiring Errors & Weather Conditions.No Voltage or Frequency Problems Occurred ML19309A4571975-12-30030 December 1975 RO 50-266/75-18:on 751217,during Facility Refueling,Failed Fuel Assembly Discovered on D-03 Fuel Rods.Caused by Water Impingement Through Baffle Plate While Failed Assembly Was in Cycle 2 Position H-1.Thorough Insp Program Is Underway 1982-02-09
[Table view] Category:TEXT-SAFETY REPORT
MONTHYEARNPL-99-0569, Monthly Operating Repts for Sept 1999 for Pbnp,Units 1 & 2. with1999-09-30030 September 1999 Monthly Operating Repts for Sept 1999 for Pbnp,Units 1 & 2. with ML20212D5961999-09-15015 September 1999 Safety Evaluation Supporting Licensee IPEEE Process.Plant Has Met Intent of Suppl 4 to GL 88-20 NPL-99-0051, Monthly Operating Repts for Aug 1999 for Pbnp,Units 1 & 2. with1999-08-31031 August 1999 Monthly Operating Repts for Aug 1999 for Pbnp,Units 1 & 2. with NPL-99-0449, Monthly Operating Repts for July 1999 for Pbnp,Units 1 & 2. with1999-07-31031 July 1999 Monthly Operating Repts for July 1999 for Pbnp,Units 1 & 2. with ML20196J4251999-06-30030 June 1999 Safety Evaluation Authorizing Proposed Alternatives Described in Relief Requests VRR-01,ROJ-16,PRR-01 & VRR-02 ML20209D2691999-06-30030 June 1999 Monthly Operating Repts for June 1999 for Pbnps,Units 1 & 2 ML20196F3341999-06-22022 June 1999 Safety Evaluation for Implementation of 422V+ Fuel Assemblies at Pbnp Units 1 & 2 ML20195F9781999-06-10010 June 1999 Unit 2 Refueling 23 Inservice Insp Summary Rept for Form NIS-1 ML20209D2751999-05-31031 May 1999 Revised MORs for May 1999 for Pbnps,Units 1 & 2 NPL-99-0328, Monthly Operating Repts for May 1999 for Pbnp,Units 1 & 2. with1999-05-31031 May 1999 Monthly Operating Repts for May 1999 for Pbnp,Units 1 & 2. with NPL-99-0273, Monthly Operating Repts for Apr 1999 for Point Beach Nuclear Plant,Units 1 & 2.With1999-04-30030 April 1999 Monthly Operating Repts for Apr 1999 for Point Beach Nuclear Plant,Units 1 & 2.With ML20196F3521999-04-30030 April 1999 Non-proprietary WCAP-14788, W Revised Thermal Design Procedure Instrument Uncertainty Methodology for Wepc Point Beach Units 1 & 2 (Fuel Upgrade & Uprate to 1656 Mwt - NSSS Power) NPL-99-0193, Monthly Operating Repts for Mar 1999 for Pbnp,Units 1 & 2. with1999-03-31031 March 1999 Monthly Operating Repts for Mar 1999 for Pbnp,Units 1 & 2. with NPL-99-0134, Monthly Operating Repts for Feb 1999 for Pbnp,Units 1 & 2. with1999-02-28028 February 1999 Monthly Operating Repts for Feb 1999 for Pbnp,Units 1 & 2. with ML20207D6751999-02-22022 February 1999 Assessment of Design Info on Piping Restraints for Point Beach Nuclear Plant,Units 1 & 2.Staff Concludes That Licensee Unable to Retrieve Original Analyses That May Have Been Performed to Justify Removal of Shim Collars ML20206R9001999-01-13013 January 1999 SER Accepting Nuclear Quality Assurance Program Changes for Point Beach Nuclear Plant,Units 1 & 2 NPL-99-0008, Monthly Operating Repts for Dec 1998 for Pbnp,Units 1 & 2. with1998-12-31031 December 1998 Monthly Operating Repts for Dec 1998 for Pbnp,Units 1 & 2. with NPL-99-0091, 1998 Annual Results & Data Rept for Pbnps,Units 1 & 2. with1998-12-31031 December 1998 1998 Annual Results & Data Rept for Pbnps,Units 1 & 2. with ML20198C7671998-12-10010 December 1998 Safety Evaluation Accepting Licensee Proposed Alternative to ASME BPV Code,1986 Edition,Section XI Requirement IWA-2232, to Use Performance Demonstration Initiative Program During RPV Third 10-yr ISI for Plant,Unit 2 NPL-98-1006, Monthly Operating Repts for Nov 1998 for Point Beach Nuclear Plant,Units 1 & 2.With1998-11-30030 November 1998 Monthly Operating Repts for Nov 1998 for Point Beach Nuclear Plant,Units 1 & 2.With ML20195J5101998-11-16016 November 1998 Proposed Revs to Section 1.3 of FSAR for Pbnp QA Program ML20198J5941998-11-0303 November 1998 1998 Graded Exercise,Conducted on 981103 NPL-98-0948, Monthly Operating Repts for Oct 1998 for Point Beach Nuclear Plant,Units 1 & 2.With1998-10-31031 October 1998 Monthly Operating Repts for Oct 1998 for Point Beach Nuclear Plant,Units 1 & 2.With NPL-98-0880, Special Rept:On 980913,fire Alarm Control Panels Inoperable for More That Fourteen Days.Troubleshooting of D-401 Panel Following Installation of Replacement Batteries Revealed No Apparent Cause for Spurious Alarms.Panel D-401 Restored1998-10-21021 October 1998 Special Rept:On 980913,fire Alarm Control Panels Inoperable for More That Fourteen Days.Troubleshooting of D-401 Panel Following Installation of Replacement Batteries Revealed No Apparent Cause for Spurious Alarms.Panel D-401 Restored ML20154M9121998-10-14014 October 1998 Unit 1 Refueling 24 Repair/Replacement Summary Rept for Form NIS-2 ML20154L6751998-10-14014 October 1998 Unit 1 Refueling 24 ISI Summary Rept for Form NIS-1 NPL-98-0826, Monthly Operating Repts for Sept 1998 for Point Beach Nuclear Plant,Units 1 & 2.With1998-09-30030 September 1998 Monthly Operating Repts for Sept 1998 for Point Beach Nuclear Plant,Units 1 & 2.With ML20151W3851998-08-31031 August 1998 Monthly Operating Repts for Aug 1998 for Pbnp Units 1 & 2 NPL-98-0653, Monthly Operating Repts for July 1998 for Point Beach Nuclear Plant,Units 1 & 21998-07-31031 July 1998 Monthly Operating Repts for July 1998 for Point Beach Nuclear Plant,Units 1 & 2 ML20151W4471998-07-31031 July 1998 Corrected Page to MOR for July 1998 for Pbnp Unit 2 ML20151W4541998-07-31031 July 1998 Corrected Page to MOR for July 1998 for Pbnp Unit 1 ML20236Q3161998-07-10010 July 1998 Safety Evaluation Accepting Licensee Proposed Alternative to ASME Code Requirements PTP-3-01 & PTP-3-02 ML20236L6771998-07-0707 July 1998 Safety Evaluation Approving Wepco Implementation Program to Resolve USI A-46 at Point Beach NPP Units 1 & 2 NPL-98-0558, Monthly Operating Repts for June 1998 for Pbnp,Units 1 & 21998-06-30030 June 1998 Monthly Operating Repts for June 1998 for Pbnp,Units 1 & 2 ML20151W4261998-06-30030 June 1998 Corrected Page to MOR for June 1998 for Pbnp Unit 2 ML20151W4221998-05-31031 May 1998 Corrected Page to MOR for May 1998 for Pbnp Unit 2 NPL-98-0481, Monthly Operating Repts for May 1998 for Point Beach Nuclear Plant,Units 1 & 21998-05-31031 May 1998 Monthly Operating Repts for May 1998 for Point Beach Nuclear Plant,Units 1 & 2 ML20151W4011998-04-30030 April 1998 Corrected Page to MOR for April 1998 for Pbnp Unit 2 NPL-98-0356, Monthly Operating Repts for April 1998 for Point Beach Nuclear Plant,Units 1 & 21998-04-30030 April 1998 Monthly Operating Repts for April 1998 for Point Beach Nuclear Plant,Units 1 & 2 ML20217F3131998-04-17017 April 1998 Safety Evaluation Accepting Proposed Alternative to ASME Code for Surface Exam of Nonstructural Seal Welds,For Plant, Unit 1 ML20216D7071998-03-31031 March 1998 Monthly Operating Repts for Mar 1998 for Point Beach Nuclear Plant,Units 1 & 2 ML20151W3981998-03-31031 March 1998 Corrected Page to MOR for March for Pbnp Unit 2 NPL-98-0209, Special Rept Re Fire Barrier Inoperable for Greater than Seven Days.Compensatory Measures Implemented in Accordance W/Fire Protection Program Requirements During Time That Barriers Were Inoperable1998-03-30030 March 1998 Special Rept Re Fire Barrier Inoperable for Greater than Seven Days.Compensatory Measures Implemented in Accordance W/Fire Protection Program Requirements During Time That Barriers Were Inoperable ML20217A8501998-03-19019 March 1998 SER Accepting Proposed Changes Submitted on 980226 by Wiep to Pbnp Final SAR Section 1.8 Which Will Impact Commitments Made in Pbnp QA Program Description.Changes Concern Approval Authority for Procedures & Interviewing Authority ML20216J0101998-03-17017 March 1998 Safety Evaluation Accepting Third 10-yr Inservice Insp Interval Relief Request RR-1-18 for Plant NPL-98-0159, Monthly Operating Repts for Feb 1998 for Point Beach Nuclear Plant,Units 1 & 21998-02-28028 February 1998 Monthly Operating Repts for Feb 1998 for Point Beach Nuclear Plant,Units 1 & 2 ML20151W3891998-02-28028 February 1998 Corrected Page to MOR for Feb 1998 for Pbnp Unit 2 ML20216D7121998-02-28028 February 1998 Revised Corrected MOR for Feb 1998 for Point Beach Nuclear Plant,Unit 2 NPL-98-0084, Monthly Operating Repts for Jan 1998 for Point Beach Nuclear Plant,Units 1 & 21998-01-31031 January 1998 Monthly Operating Repts for Jan 1998 for Point Beach Nuclear Plant,Units 1 & 2 ML20198L1151998-01-0808 January 1998 SER Accepting Licensee Response to GL 95-07, Pressure Locking & Thermal Binding of Safety-Related Power-Operated Gate Valves, for Point Beach Nuclear Plant,Units 1 & 2 1999-09-30
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Wisconsin Electnc powea couesur 231 W. MICHIGAN, P.o. B0X 2046. MILWAUKEE. WI 53201 November 16, 1979 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U. S. NUCLEAR REGULATORY COMMISSION Washington, D. C. 20555 Attention: Mr. A. Schwencer, Chief Operating Reactors Branch #1 Gentlemen:
DOCKET NOS. 50-266 AND 50-301 LOSS OF 0FFSITE POWER EVENTS POINT BEACH NUCLEAR PLANT Your letter dated October 1,1979 requested that we provide you with information concerning the loss of offsite power which occurred at Point Beach on October 13, 1973 and any other loss of offsite power events. There have been a total of four loss of offsite power events at Point Beach. The following details are provided in response to your request for information:
A. PARTIAL LOSSES OF 0FFSITE POWER
- 1. Date: April 13,1971 Event: Loss of normal offsite supply to bus lA05.
Cause: Wiring error on relay test switch prevented blocking of undervoltage trip while relay was being tasted.
Results: Diesel generator 3D started and picked up bus lA05.
No other offsite power supplies were affected.
There were no voltage or frequency problems.
Normal power supply was restored a short time later. Them was no effect on the unit since it was shut down at the time.
B. TOTAL LOSSES OF 0FFSITE POWER
- 1. Date: February 5,1971 Event: Loss of all offsite power and all transmission lines.
Cause: Major ice storm and improper relay operation.
Results: All transmission lines were lost and differential lockout relays on transformers 1X03, 1X04 and 2X04 tripped. Both diesel generators started and picked j up the safeguards loads on Unit 1 which was not on ?
791130051.3
] ~ Mr. Harold R. Denton, Director November 16, 1979 ee
[ B. TOTAL LOSSES OF 0FFSITE POWER - continued
- 1. Results: line at the time. One bus on Unit 2 was not picked up because a control power fuse had blown.
Unit 2 was not licensed yet ar.d no fuel had been loaded. The restoration of offsite power to the plant was delayed by the need to evaluate gas sanples from the transformers which had locked out. The outage lasted for 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and 22 minutes. There were no voltage or frequency problems.
- 2. Date: October 13, 1973 Miit: Loss of all offsite power to safeguare; buses.
Cause: A lightning mast failed and fell on transformer 2X03 while transformer IX03 and the gas turbine generator wem temporarily out of service.
Results : The diesel generators started and supplied power to the safeguards buses of both units. Unit 1 was in hot shutdown and Unit 2 did not trip. The gas turbine generator was returned to service 55 minutes after the event and supplied offsite power to both units for 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> and 30 minutes. At that time transformer IXO3 was returned to service. There were no voltage or frequency problems.
- 3. Date: April 27,1974 Event: Loss of all offsite power to Unit 1.
Cause: A wire lifted in the switchyard control house during a relay modification initiated a breaker failure scheme which isolated 345kV bus section 1.
Results: The isolation of B.S. I removed the power supply to transfonner 1X03, the Unit I high voltage station auxiliary. A fast transfer took place on the 13.8kV bus which would have restored the offsite power to Unit 1, but the 4kV bus under-voltage relays operated before the transfer.
These undervoltage relays trip the connections to offsite power and start the diesel generators.
The buses which were now being supplied by the diesel generators were synchronized to the off-site power supply almost inmediately by the operator and the system was returned to nonnal.
There wem no unit trips, nor were there any voltage or frequency problems.
Very truly yours,
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C. W. F y, Director Nuclear Power Department
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- REGULAIURY I r4F0HM A T 10N DISTHiouTION SYSTEM (H10S)
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ACCESSIUrd NBH 7911300S13 00C.0 ATE: 79/11/lo NOIAR14ED: rau 00CKET a
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FACIL:50-doo Point beach Iduclear Plant, Unit 1, nisconsin Electric 050002oo 50-301 Point deacn Nuclear Plant, Unit 2, aisconsin Electric 05000301 AUTH NAME AVIHUN AFFILIAT10N FAY,C.a. Aisconsin Electric Power Co.
H tC I P . .v AME HEC 191ENT AFFILIATION
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SuoJECT: Four Hos on 710413,0205,761013 4 74042/ re certial 4 total losses of offsite power. Caused by . icing errors 5 weatner conditions.No voitarie or trequency oroolens occurred.
DISTHIbu1 ION CODE: A015S CUPIES H EIvto:LTH 6 /Ei4CL .d. SIZL: M_
TITLE: Onsite Emergency Power Systems 44U T k S : $ % E., ~ .3 CMS
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INTEhNAL: 01 NEG FILE 1 L 02 NHC POR 1 1 2
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12 TA/E00 1 1 13 IsE e 15 OELO 1 1 lo MPA 1 l 17 Aux 1L SYS 6k 1 1 16 IsC SYS SH 1 l 20 ENGR oH 1 1 21 HEAC sFTY uH 1 :
22 PLANI SYS bH 1 1 1 23 Auv HEAC BH 1 24 pan SYS eR 1 'l d5 WAM6ACH ~ T 1 l 2o TON 01,0 1 1 27 SCU 0id ALD ,0 1 1 29 6d1NAMAN 1 1 30 EE6 1 :
S HANAULH 1 1 EXTERNAL: 03 LPOR 1 1 04 ' SIC 1 31 ACRS 16 1 if9 O T01AL iguMbE4 0F CJPIES HEduIRE0: LIId 4 ENCL /
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