ML20086F406

Rept of Incidents/Occurrences for 760102-1117

ML20086F406
Person / Time
Site:	Robinson
Issue date:	11/17/1976
From:	CAROLINA POWER & LIGHT CO.
To:
References
NUDOCS 8312230313
Download: ML20086F406 (3)

Text

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50-261 . ,

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H. B. ROBINSON UNIT 2 Incidents or Occurrences CAROLINA POWER & LIGHT COMPANY ,

Pirnt Name

b. l Date Description R0- EVENT DEVELOPEMENTS REGARDING WESTINGHOUSE SAFETY ANALYSES RESULb IN SIGNIFICANT IMPACTS 261/ DATE TO LOCA ANALYSIS PEAK CLAD TEMPERATURE AND ROD BOW DNB PENALTY.

76-14 8/5/76 ,

RO- EVENT WHILE PERFORMING AUKILIARY' FEEDWATER PT-22 AT 1007. POWER, AUXILIARY EEEDWATER 261/ DATE PUMP DISCHARGE VALVE V2-16A FAILED TO OPEN AS REQUIRED. THE REDUNDANT AUXILIARY ~

76-15 8/17/76 FEEDWATER PUMP DISCHARGE CALVE OPERATED PROPERLY.

RO- EVENT. AS A RESULT OF A XEN% GEATED POWER DISTRIBUTION, CONSISTENT WITH' ZERO POWER ,

261/ DATE OPERATION FOLLOWING FULL DOWER OPER ATION, THE TOTAL CUMMUL-(TIVE TIME OUTSIDE 76-16 8/7/76 THE CAOC TARGET BAND EXCEii,DED THE ONE HOUR LIMIT,DURING POWER OPERATION BELOW 9Q7.

POWER.

RO- EVENT - DURING PERFORM /SCE OF A PERIODIC TEST (PT-10) ON .HVH-4, CONTAINMENT FAN COOLER ^ -

261/ DATE UNIT, THE NORMAL _AND EMERGENCY DAMPERS FAILED TO FUNCTION PROPERLY. THE THREE 76-17 9/8/76 REMAINING HVH UNITS'WERE OPERATING PROPERLY. .

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DURING NORMAL OPERATION, "B" BORIC ACID TRANSFER PUMP WAS TRIPPED BY ITS HIGH

. ALSO MN M N M RMARE, M DISCHARGE PRESSM 7 8 8/76 INDICATION WAS LOW. UNIT WAS OPERATING AT 1007. POWER WITH "A" BORIC ACID TRANSFER PUMP AVAILABLE.

' R0- EVENT DURING NORMAL OPERATION "B" BORIC ACID TRANSFER PUMP TRIPPED DUE TO HIGH PUMP 261/ DATE MOTOR TEMERATURE CUTOUT. UNIT WAS OPERATING AT 1007. POWER WITH "A" PUMP AVAIL-

,76-19 10/29/76 ABLE. HEAT TRACING CIRCUITS FOR THE PUMP ENCLOSURE WERE FOUND EXCESSIVE.

RO- EVENT DURING SHUTDOWN FOR A REFUELING OUTRAGE, SMALL PINHOLE LEAKS WERE FOUND ON THREE i261/ DATE (ONE CRDM AND TWO PLUGS) CANOPY SEAL WELDS.

76-20 11/17/76 eBARa8 S

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H. B. ROBINSON UNIT 2 Incidents or Occurrences CAROTTNA POWER & LIGHT COMPANY ,

Plant Name 43  ! Date Description RO- EVENT DURING PER.FORMANCE OF A PERIODIC TEST ON BORIC ACID HEAT TRACING, NO CURREN FLOW 261/ DATE WAS FOUND PRIMARY CKT 56. (SECONDARY WAS OPERATING PROPERLY). BREAKERS WERE 76-7 4/2/76 OPENED TO FACILITATE REPAIR. ,

RO- EVENT DURING PERFORMANCE OF PERIODIC TEST 21.2, ROD EXERCISE, R0D L-9 DROPPED DUE TO 261/ DATE LOOSE ELECTRICAL CONNECTOR. A RADIAL TILT WAS INDUCED RESULTING IN OPERATION ~

76-8 4/4/76 IN A DEGRADED MODE PERMITTED BY TECH. SPEC.

RO- EVENT DURING RECOVERY,FROM FORCED OUTRAGE PROMPTED BY DROPPED ROD, A RADIAL TILT WAS ,

261/ DATE EXPERIENCED DUE TO RADIAL XENON IMBALANCE. THE PREVIOUS POWER' TILT CREATED 76-9 4/4/76 THIS IMBALANCE. , ,

R0- kVENT - AS A RESULT OF VARIOUS FORCED POWER MANEUVERS DUE TO DROPPED ROD, RADIAL TILTS, -

261/ DATE AND LOW RCP SEAL FLOW, THE TOTAL CUMMULATIVE TIME OUTSIDE CAOC LIMITS EXCEEDED 76-10 4/4/76 1 HOUR. .

R0- . EVENT DURING NORMAL OPERATION "B" 30RIC ACID TRANSEER PUMP TRIPPED 'DUE'TO HIGH PUMP -

261/ DATE TEMPERATURE CUTOUT. UNIT WAS OPERATING AT 1007.' POWER WITH "A" PUMP AVAILABLE.

76-11 4/12/76 R0- EVENT DURING PERFORMANCE.0F A REACTOR STARTUP FOR TRAINING, THE REACTOR WAS BROUGHT 261/ DATE TO CRITICALITY WITH CONTROL RODS INSERTED.INTO THE CORE BELOW THE INSERTION, 76-12 5/1/76 LIMITS AS DEFINED.BY PLANT TECH. SPEC.

R0- EVENT WHILE PLANT WAS CRITICAL AND AT POWER AND WHILE PERFORMING MAINTENACE ON "B, l261/ DATE BATTERY,. LEADS WERE REMOVED _FROM "B" BATTERY RENDERING THE BATTERY INOPERABLE.

76-13 7/10/76 l .

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H. B. ROBINSON UNIT 2 Incidents or Occurrences __

CAROLINA POWER & LIGHT COMPANY Plant Name 1 is.  ! Date Description A0- EVENT FAILURE OF "B" BORIC TRANSFER ~ PUMP.

261/ DATE 76-1 1/2/76 ,

REPORTED REACTOR PROTECTION S.YSTEM LOGIC RELAY MALFUNCTIONS. ,

ON ~

1/22/76 , , , , ,

A0- EVENT FAILURE OF ONE AND DELAYED OPERATION OF TWO REACTOR TRIP RELAYS. ,

261/ DATE -

76-2 1/29/76 , ,

4 A0- EVENT '

BORON CONCENTRATION BELOW LIMITS IN "B" SAFETY. INJECTION ACCUMULATOR.

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261/ DATE ,

76-3 2/4/76 R0- . EVENT FAILURE OF "B" EMERGENCY DIESEL TO ASSUME RATED CAPACJTY DURING A PERIODIC TEST ~

261/ DATE THE UNIT WAS OPERATING AT FULL POWER WITH REDUND5NT SYSTEMS AVAILABLE.

,76-4, 3/1/76 i.

!RO- EVENT DURING PERFORMANCE,0F A PERIODIC TEST ON HVII-4, CONTAINMENT FAN COOLER UNIT, THE

.261/ DATE NORMAL AND EMERGENCY DAMPERS FAILED TO FUNCTION. THE REMAINING 3 HVH UNITS ,

76-5 3/3/76 OPERATED PROPERLY. THE PROBLEM DAMPERS WERE LUBRICATED, FREED, SATISFACTORILY 2 TESTED AND RETURNED TO SERVICE.

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t R0- EVENT THE LOCA SAFETY ANALYSIS BY UESTINGHOUSE FAILED TO ACCOUNT FOR THE EFFECT OF ~

i 261/ DATE STEAM GENERATOR TUBE PLUGGING ON BLOWDOWN AND REFLOOD. l (76-6 3/12/76

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