ML20090D396
| ML20090D396 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 06/12/1973 |
| From: | Perkins T NIAGARA MOHAWK POWER CORP. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20090D394 | List: |
| References | |
| NUDOCS 8302280105 | |
| Download: ML20090D396 (1) | |
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3153422049 TDMT OSWEGO NY 194 06-12 0641P EST PMS KEE YOUNG, TLX CARE ATOMIC ENERGY COMMISSION DIVISION OF REACTIVE COMPLIANCE REGION 1 970 BROAD ST NEWARK NJ O
REACTOR OPERATING AT 12 PERCENT POWER VITH 30 PERCENT BYPASSED STEAM (100 PERCENT BYPASS EQUALS 40 PERCENT TOTAL STEAM). REACTOR PSIG 950, TORUS TEMPERATURE 75 DEGREES F TORUS LEVEL 3 2 FEET o
o SUBMERGENCE. TESTING OF ELECTROMATIC RELIEF VALVES IN PROGRESS.
ALL VALVES HAD RESPONDED S ATISFACTORILY UP TO THIS TIME. OPENED 0
1 FIFTH' VALVE OF SIX (113) AT 0207 HOURS. INDICATED BYPASS STEAM DROPPED TO 16 PERCENT. ELECTROMATIC VALVE SWITCH THEN CLOSED C
0 (DURATION OF CYCLE 1 32 SECONDS). 9YPASS INDICATION REMAINED AT 16 PERCENT. TORUS TEMPERATURE STARTED SLIGHT INCREASE TERMINATION O
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O 0F ELECTROMATIC OPERATION BY CLOSING MANUAL BLOCKING VALVE UPSTREAM OF 113 ELECTROMATIC. BYPASS VALVE POSITION RETURNED TO 27 PERCENT 0
C (REACTOR SHUT DOWN HAD 3EGUN DURING ELECTR0MATIC VALVE 113 OPERATION, THEREFORE DIFFERENCE IN STARTING AND ENDING 9YPASS POSITION)
TORUS TEMPERATURE HEAT AT 125 ' DEGREES F, LEVEL AT 3 6 FEET SUBMERGENC E. REACTOR PERAMETERS UNCH ANGED DURING INCIDENT. CALCUL ATED C
0 MAXIMUM BLOWDOWN OF COOLANT 25,000 GALLONS, APPROXIMATELY 207 K POUNDS OF STEAM. DURATION OF ELECTROMATIC OPERATION 43 MINUTES.
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REACTOR ORDERLY SHUT DOUN COMPLETED TO LESS THAN 110 PSIG AT 1300 HOURS. TORUS COOLANT ACTIVITY INCREASED FROM 470 C/M/ML TO 506 C/P/ML DURING INCIDENT. YRITTEN REPORT TO FOLLOW BY JUNE Mk C
T J PERKINS 9 MILE POINT NUCLEAR POWER STATION
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