ML18038A354
| ML18038A354 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 05/31/1991 |
| From: | NIAGARA MOHAWK POWER CORP. |
| To: | |
| Shared Package | |
| ML17058A805 | List: |
| References | |
| NUDOCS 9106190237 | |
| Download: ML18038A354 (8) | |
Text
NIAGARAMOHAWK POWER CORPORATION NINE MILE POINT NUCLEAR STATION UNIT ¹1 NARRATIVE OF OPERATING EXPERIENCE The Station operated during the month of May 1991 with a Unit Availability Factor of 95.8%
and a Net Design Electrical Capacity Factor of 88.2%. There were no challenges to Electromatic Relief Valves. Reductions in Capacity Factor were due to an aborted Turbine Torsional Test on May 14, due to ¹11 Turbine Aux Oil Pump failure. The unit was reduced to 25% CTP for the test which contributed to lost generation. The Turbine Torsional Test was rescheduled and successfully completed on May 29 and 30. Other reductions in capacity factor were due to weekly control rod exercising and the inability to obtain 100% CTP due to turbine steam flow limitation.
CLASS I WORK - MECHANICALMAINTENANCE- May 1991 See attached printout.
CLASS I WORK - INSTRUMENTS AND CONTROLS - May 1991 See attached printout.
CLASS I WORK - ELECTRICAL MAINTENANCE- May 1991 See attached printout.
9106190237 9106il PDR ADOCK 05000220 R PDR
'r NINEHILE
"- POINT UNIT ONE Mechanical Haintenance COHPLETED SAFETY'RELATED WRs FOR HAY 06-03-91 PAGE 1 WR Number EPN Number TITLE Description Corrective Action W199308 58-04 OOWNCOHER WATER IS TRAPPED IN PIPE WITH VALVES CLEANED INSIDE OF 552 AND SUBHERGENCE 201 2-552 ANO,201.2-551 DRAIN WATER REINSTALLED TRANSHITTER FROH VALVE TO'EMPTY THIS PIPE ELEVATION 216 BELOW 218 GRATING REACTOR BUILDING SOUTH EAST CORNER W199852 68-08 REACTOR BUILDING DURING PERFORMANCE OF N1-ISP-068-9002 CLEANED AND POLISHED AIR CYLINDER TORUS VACUUM BREAKER ATTACHHENT NUHBER 2 VALVE 68-08 FAILED REPLACED WIPER RINGS AND READJUSTED NUHBER 11 TO ACTUATE WITH PROPER INPUT SIGNAL STROKE WHILE ATTEHPTING TO ASSIST VALVE SWITCH THAT INDICATES OPEN POSITION WAS BROKEN VALVE NOW HAS DUAL INDICATION NUHBER 11 VACUUM BREAKER REACTOR BUILDING 237 COLUHN N-7 DEFICIENCY TAG 27322 W184 168 70-13R RBCLC HEAT EXCHANGER REHOVE AN 81 INCH PLUS OR MINUS 1 INCH ABB/CE USING MOM .CUTTING METHOD CUT 70-13 11 LONG SECTION OF TUBES IDENTIFIED IN 60 TUBES AS INDICATED ON APPLICABLE DRAWING F"42345-C SHEET 4 REVISION 1 AS DRA'WINGS AFTER CUT TUBES WERE HEASUREO FROH THE NORTH ENO - PLUG EACH REMOVED AND THEN SEAL WELDED END AND SEAL WELD - SEE DRAWING F-42345-C SHEET 4 REVISION 1 W185335 72-438 BV-11 RBCLC HX TUBE DRAIN VALVE,PLUGGED NEEDS TO BE CLEANED CLEANED PIPING AND VALVE - REHOVED SIDE. DRAIN CLC HEAT REACTOR BUIL'DING 298 DEFICIENCY TAG VALVE AND STEH TO CLEAN PIPING EXCHANGER 70-13R 13338 CLEANED VALVE SEATS AND REASSEMBLED REPLACED BODY TO BONNET GASKET W185887 93-RW"720 DRAIN VALVE FOR HEAT DRAIN VALVE IS PLUGGED WILL NOT DRAIN REHOVED BONNET FROH BODY CLEANED EXCHANGER 80-13R OFF EAST SIDE OF HEAT EXCHANGER TUBE SEATS AND PIPING REPLACED GASKET SIDE LOCATION REACTOR 318 NORTH HEAT AND BONNET TO BODY BOLTS EXHANGER 122 EAST END DEF TAG 17097 ON REASSEHBBLED VALVE AND FLUSHED DRAIN VALVE AGAIN W185334 94"02 EPN 94-02 NUHBER 12 EXHAUST TEHPERATURE IS HIGH PLEASE REMOVE AND REBUILD VALVES LPI-2 INSTRUHENT AIR REPAIR - TURBINE BUILDING 261 LPI-4 AND LPD2 LPD-3 - ALL VALVES COHPRESSOR TESTED ON TESTING HACHINE W187847 210. 1-4 1R CHILLEO WATER PUHP TURBINE BUILDING 300 SOUTHEAST ISOLATION VALVE REMOVED AND REPLACED WITH NEW 12 PRESSURE GAUGE VALVE FOR 210 1-41R IS LEAKING THERE IS VALVE FROH STORES NO OTHER ISOLATION VALVE BEFORE IT NEEDS TO BE REPLACED DEFICIENCY TAG 23751 ON VALVE
~
NINE HILE POINT UNIT ONE Instrument 8 Controls - COMPLETED SAFETY RELATED WRs FOR HAY 06-03-91 PAGE 2
'WR Number EPN Nunber TITLE DescriPtion Corrective Action W188534 44-14-15 SOV 117 FOR HCU SOV 117 FOR HCU 14-15 IS LEAKING REBUILT SOV AND TIGHTENED TO 14-15 DEFICIENCY TAG 37356 IS HUNG ON THE HANUFACTURER SPECIFICATIONS VALVE LOCATED REACTOR BUILDING 237 W188598 44 2-35A SCRAH DUHP VOLUHE RECEIVED HALF SCRAH - TROUBLESHOOT OR ADJUSTED FAILURE LAMP LED TO LEVEL SENSOR REPAIR - REACTOR BUILDING 237 NORTH WEST REQUIRED VALUE TFSTED OPERATION VIA PHT - WIP W192454 92-IRH11" 18 INTERHEDIATE RANGE INVESTIGATE THE IRHS BY GE TO OETERHINE ASSISTED GE PERSONNEL AS REQUIRED
.MON I TORS CAUSE OF GAIN PROBLEHS ASSOCIATED WITH TO OBTAIN INFORMATION NEEDEO FOR RANGE SWITCHES RANGE 8 LIHIT FOR IRM 16 TROUBLESHOOTING RANGE S'WI TCH AND 17 AND RANGE 9 LIMIT FOR IRH 12 INCONS I STENC I ES W192707 - 92-RJ19D APRH 17 TRIP BYPASS SWITCH FAILS TO UNBYPASS LPRH CLEANED 5'WI TCH W I TH FREON TF AND AUXILIARY DRAWER 12-178 - CONTROL ROOH G PANEL LUBRICATED WITH 'WD-40 BYPASS SWITCH 12-17B W199862 94-30 NUHBER AIR DRYER ll INSTRUHENT NUMBER 11 INSTRUHENT AIR DRYER IS LOW ON FREON - PLEASE REPAIR - LOCATED ON OPENED THE TEHPERATURE CONTROL FEEDBACK LINE TO THE SUCTION OF TURBINE BUILDING 291 WEST WALL COMPRESSOR DEFICIENCY TAG 27340 ON PANEL IN CONTROL ROOH W188554 113-NA SCRAM AIR HEADER PLEASE CHECK SCRAH AIR HEADER SYSTEM ENTIRE SCRAH AIR HEADER SYSTEH BACK UP SCRAH SOLENOID - INDIVIDUAL BOUNDARIES LEAK CHECKED AND REPAIRS PILOT SOLENOIDS AND PIPING AND FITTING HADE ON WR 112111 RECENT PROBLEM FOR LEAKS - CORRECT AS NECESSARY WITH SCRAH AIR HEADER LOW PRESSURE ALARM LOCKING IN DURING HALF SCRAH SURVEILLANCES CAUSED BY LARGE LEAK ON SCRAH PILOT SOV 117 ON HCU 14-15 W192 714 201 2-218 NUMBER ll -
OXYGEN'NALYZER CAD OXYGEN ANALYZER READS UPSCALE TROUBLESHOOT PLEASE TOTAL SETUP PER VENDOR HANUAL FOLLOWED UP BY THE PHT Nl-ISP-201-Q013 W185942 201 2-218C CHANNEL 11 02 ALARH DURING CALIBRATION OF CHANNEL 11 02 REPLACED LED UNIT ALARMS UPPER ALARH LED FA ILED TO LIGHT ANNUNCIATOR DID COHE IN PLEASE REPAIR DEF TAG 12667 TROUBLESHOOT W'192753 201 8-09 REACTOR CONTAINHENT. TROUBLESHOOT ALARH LOOP TO OETERHINE FOUND A NEGATIVE CURRENT LOOP INERT GAS SUPPLY PROBLEH REPORT 2009 DISPOSITION FOR ACROSS COHPUTER 4H I TO V RESISTOR SYSTEH NUHBER 12 LOADED DOWN CIRCUIT 'WHEN ALARM UNIT IS INFORHATION GATHERING ONLY ALARM UNIT IN TRIPPED CONDITION W 188069 210 1-101 TEHPORARY TEHPORARY HODIFICATION 5343 AS DIRECTED INSTALLED JUHPER AS PER TEHPORARY MODIFICATION 5343 ON BY DCR Nl-91-500LG020 - JUHPER TO BE HODIFICATION 5343 AND DCR 112 CHILLER COMP OIL HANUFACTUREO'SING WIRE CONSISTENT WITH Nl-91-500LG020 PRESSURE SAFETY FIELD WIRE TO OIL PRESSURE SAFETY SWITCH 5'W I TCH
~
I
~ ~
NINE HILE POINT UNIT ONE Electrical Haintenance - COMPLETED SAFETY RELATED WRs FOR HAY 06"03"91 PAGE 3 WR Number EPN Number TITLE Description Corrective Action W185 535 210 1-111 CONTROL ROOH CHILLER REPLACE HOLDED CASE BREAKER FOR 111 REPLACED BREAKER SYMBOL 93-43-395 111 BREAKER CHILLER 39 AHP - SEE PROBLEH REPORT 1713 PER DCR Nl-90-001-LS920 WHICH AND OCR Nl-90-001LS507 SUPERCEDES DCR Nl-90-001-LS507 W185 534 210.1-112 CONTROL ROOM CHILLER REPLACE HOLDED CASE BREAKER FOR 112 REPLACED BREAKER SYHBOL NUHBER 112 BREAKER CHILLER 27 AHP - SEE PROBLEH REPORT 1713 93-43-396 PER DCR Nl-90-001-LS'920 AND DCR Nl-90-001LS507 WHICH SUPERCEDES OCR Nl-90-001-L 5507 W171853 210 1-121 CONTROL ROOH CHILLER REPLACE HOLDED CASE BREAKER FOR 121 REPLACED HOLDED CASE BREAKER 39 AHP 121 BREAKER CHILLER COHPRESSOR 39 AHP - SEE PROBLEH PER DCR Nl-90-001-LS92 WHICH REPORT 1713 AND OCR Nl-90-001-LS507 SUPERCEDES DCR Nl-90-001-LS507 W185532 210 1-122 CONTROL ROOH CHILLER REPLACE HOLDED CASE BREAKER FOR 122 REPLACED HOLDED CASE BREAKER 27 AMP 122 BREAKER CHILLER COHPRESSOR 27 AHP - SEE PROBLEH PER DCR Nl-90 "001-,LS92 WHICH REPORT 1713 AND DCR Nl-90 "001LS507 SUPERCEDES DCR Nl-90-001-LS507
~ 4 L