ML20086F406
| 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 D:ck2t Number H. B. ROBINSON UNIT 2 Incidents or Occurrences CAROLINA POWER & LIGHT COMPANY Pirnt Name b.
Date Description l
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.
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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
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. 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 usa!SA S
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Pg. 2 FILE #6 50-261 Dockst Number 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
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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
mm
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" #6 50-261 I)ccket Number 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
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1/22/76 A0-EVENT FAILURE OF ONE AND DELAYED OPERATION OF TWO REACTOR TRIP RELAYS.
76-2 1/29/76 261/
DATE 4
A0-EVENT BORON CONCENTRATION BELOW LIMITS IN "B" SAFETY. INJECTION ACCUMULATOR.
261/
DATE
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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.
t R0-EVENT THE LOCA SAFETY ANALYSIS BY UESTINGHOUSE FAILED TO ACCOUNT FOR THE EFFECT OF 261/
DATE STEAM GENERATOR TUBE PLUGGING ON BLOWDOWN AND REFLOOD.
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(76-6 3/12/76
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