U.S. Nuclear Regulatory Commission Operations Center Event Reports For 09/28/94 - 09/29/94 ** EVENT NUMBERS ** 27736 27782 27831 27832 27833 27834 27835 !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27736 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: BROWNS FERRY REGION: 2 |NOTIFICATION DATE: 08/31/94 | |UNIT: [ ] [2] [ ] STATE: AL |NOTIFICATION TIME: 16:47 [ET]| |RX TYPE: [1] GE-4,[2] GE-4,[3] GE-4 |EVENT DATE: 08/31/94 | +------------------------------------------------+EVENT TIME: 12:48[CDT]| |NRC NOTIFIED BY: BOOHER |LAST UPDATE DATE: 09/28/94 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |COLLINS RDO | |AINA 50.72(b)(2)(iii)(A) POT UNABLE TO SAFE SD | | |AIND 50.72(b)(2)(iii)(D) ACCIDENT MITIGATION | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N Y 95 POWER OPERATION | 95 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | LOSS OF ECCS DIVISION1 INVERTER CAUSED INOPERABILITY OF RCIC SYSTEM AND ALL | | ECCS SUBSYSTEMS. | | | | AT 1248CDT, THE LICENSEE RECEIVED AN ECCS ANALOG TRIP UNIT TROUBLE ALARM. | | UPON INVESTIGATION, THE LICENSEE DISCOVERED THAT THE DIVISION 1 ECCS | | INVERTER HAD FAILED, AND A SUPPLY FUSE TO THE INVERTER HAD BLOWN. THIS | | RESULTED IN THE LOSS OF THE RCIC FLOW CONTROLLER, 2/4 DRYWELL PRESSURE | | SENSOR CHANNELS, AND 2/4 REACTOR VESSEL WATER LEVEL SENSOR CHANNELS, AS | | WELL AS NUMEROUS OTHER MISCELLANEOUS SENSORS. LOSS OF THE DRYWELL PRESSURE | | AND REACTOR VESSEL WATER LEVEL CHANNELS RESULTED IN THE LICENSEE DECLARING | | ALL ECCS SUBSYSTEMS INOPERABLE. DUE TO THE INOPERABILITY OF ALL ECCS | | EQUIPMENT, THE UNIT ENTERED TECHNICAL SPECIFICATION 3.0.3, WHICH REQUIRES | | THAT THE UNIT BE IN HOT SHUTDOWN WITHIN 6 HOURS, AND IN COLD SHUTDOWN | | WITHIN 30 HOURS. | | | | THE LICENSEE DISCOVERED A FAULTY DIODE IN THE INVERTER, MADE REPAIRS, AND | | DECLARED RCIC AND THE ECCS SUBSYSTEMS OPERABLE AT 1350CDT. NO POWER | | REDUCTION HAD BEEN MADE AS A RESULT OF ENTRY IN TS 3.0.3. NO EQUIPMENT | | ACTUATED AS A RESULT OF THE LOSS OF POWER TO THE DIVISION 1 ECCS LOGIC. THE | | RI HAS BEEN INFORMED. | | | | *** UPDATE FROM GOLDEN TO HUFFMAN AT 1037 EDT ON 9/1/94 *** | | THE FAILURE OF THE INVERTER WAS DUE TO A SHORTED SILICONE CONTROL RECTIFIER | | (SCR), NOT A BLOWN FUSE AS PREVIOUSLY REPORTED. THE RESIDENT AND | | R2DO(COLLIN) HAVE BEEN INFORMED. | | | | * * * UPDATE 1815EDT ON 9/28/94 FROM R.KNIGHT TO S.SANDIN * * * | | THE LICENSEE IS RETRACTING THIS EVENT BASED ON THE FOLLOWING EVENT | | SYNOPSIS, DETAILED INFORMATION, AND REPORTABILITY LOGIC. | | | | TEXT | | | | I. EVENT SYNOPSIS | | | | UNIT 2 ECCS/ATWS DIVISION 1 INSTRUMENTATION AND RCIC FLOW CONTROLLER POWER | | WAS LOST DUE TO FAILURE OF THE ASSOCIATED ECCS DIVISION 1 INVERTER. THIS IS | | A REVISION TO RETRACT THE FOUR HOUR REPORT PREVIOUSLY MADE. | | | | II. DETAILED INFORMATION | | | | ON AUGUST 31, 1994 AT 1248, ECCS ANALOG TRIP UNIT TROUBLE, REACTOR PRESSURE | | LOW/CORE SPRAY RHR PERMISSIVE, AND SEVERAL SUPPRESSION POOL TEMPERATURE AND | | LEVEL ALARMS WERE RECEIVED IN THE UNIT 2 CONTROL ROOM. INVESTIGATION | | REVEALED THAT THE ECCS DIVISION 1 INVERTER HAD FAILED DUE TO A SHORTED | | SILICON CONTROLLED RECTIFIER (SCR). | | | | THE ECCS DIVISION 1 INVERTER SUPPLIES POWER TO TWO OF FOUR CHANNELS OF | | DRYWELL PRESSURE AND REACTOR WATER LEVEL SENSORS. THESE SENSORS FEED BOTH | | DIVISIONS OF INITIATION LOGIC FOR ALL ECCS (RHR, CS, HPCI, ADS DIESEL | | GENERATORS). OTHER SENSORS FOR REACTOR PRESSURE AND CONTAINMENT PARAMETERS | | ARE ALSO SUPPLIED BY THIS INVERTER, AS IS THE RCIC FLOW CONTROLLER. THE | | REMAINING CHANNELS OF INSTRUMENTATION POWERED FROM THE ECCS DIVISION 2 | | INVERTER ARE SUFFICIENT TO INITIATED THE LOGIC OF ALL ECCS DIVISIONS. THE | | RCIC SYSTEM WOULD FAIL TO FUNCTION AS A RESULT OF LOSS OF POWER TO THE FLOW | | CONTROLLER. | | | | DIVISION 1 OF THE ATWS/RECIRCULATION PUMP TRIP-ALTERNATE ROD INSERTION | | (RPT-ARI) SYSTEM RECEIVES REACTOR PRESSURE AND WATER LEVEL SIGNALS FROM | | DIVISION 1 ECCS INSTRUMENTATION ONLY. THE DIVISION 2 ATWS/RPT-ARI SYSTEM | | REMAINED FULLY OPERABLE. EITHER DIVISION OF THE ATWS/RPT-ARI LOGIC WILL | | FUNCTION TO PROVIDE THE REQUIRED SAFETY ACTION. | | | | TECHNICAL SPECIFICATION SECTION 3.2.B ACTION 1.B REQUIRES THAT THE | | ASSOCIATED ECCS BE DECLARED INOPERABLE UPON LOSS OF TWO OF THE FOUR | | REDUNDANT SENSORS FOR ECCS INITIATION LOGIC. THIS RESULTS IN ALL UNIT 2 | | ECCS BEING DECLARED INOPERABLE. THE TECHNICAL INOPERABILITY OF ALL ECCS IS | | CONSIDERED TO BE CIRCUMSTANCES IN EXCESS OF THOSE ADDRESSED IN TECHNICAL | | SPECIFICATIONS. THE PROVISIONS OF SECTION 1.C.1 APPLIED, REQUIRING UNIT 2 | | TO BE PLACED IN HOT STANDBY WITHIN SIX HOURS AND IN COLD SHUTDOWN WITHIN | | THE FOLLOWING 30 HOURS UNLESS THE PROBLEM WAS SOONER CORRECTED. | | | | THE INVERTER WAS REPAIRED AND THE ASSOCIATED INSTRUMENTS AND SYSTEM | | DECLARED OPERABLE AT 1350. NO SHUTDOWN OR POWER REDUCTION WAS REQUIRED. | | DURING THIS EVENT, UNIT 2 WAS IN END-OF-CYCLE COASTDOWN AT 93 PERCENT | | POWER. DIESEL GENERATOR "C" WAS OUT OF SERVICE FOR SCHEDULED MAINTENANCE. | | | | REPORTABILITY LOGIC: | | | | THE RCIC SYSTEM WAS MADE INOPERABLE BY THE INVERTER FAILURE. THIS WAS | | PREVIOUSLY REPORTED TO THE NRC WITHIN FOUR HOURS BY ENS UNDER | | 10CFR50.72(b)(2)(iii) AS "ANY EVENT OR CONDITION THAT ALONE COULD HAVE | | PREVENTED THE FULFILLMENT OF THE SAFETY FUNCTION OF SYSTEMS THAT ARE NEEDED | | TO...REMOVE RESIDUAL HEAT, OR...MITIGATE THE CONSEQUENCES OF AN ACCIDENT". | | HOWEVER, NO CREDIT IS TAKEN FOR RCIC IN THE FSAR FOR A SAFETY SYSTEM, AND | | AS SUCH IS NOT DESIGNED FOR A SAFETY FUNCTION AS DEFINED ABOVE. FOR THIS | | REASON, THIS EVENT SHOULD NOT HAVE BEEN REPORTED TO THE NRC WITHIN 4 HOURS. | | | | THE INVERTER FAILURE RESULTED IN THE TECHNICAL INOPERABILITY OF ALL ECCS ON | | UNIT 2. EACH INDIVIDUAL SYSTEM HAS A REQUIREMENT FOR APPROPRIATE ACTIONS TO | | BE TAKEN, HOWEVER A CONSERVATIVE APPROACH WAS TAKEN AND TECHNICAL | | SPECIFICATION DEFINITION 1.C.1 WAS EVOKED REQUIRING THE REACTOR BE PLACED | | IN A HOT STANDBY CONDITION WITHIN 6 HOURS. AND COLD SHUTDOWN WITHIN THE | | FOLLOWING 30 HOURS DUE TO MULTIPLE SYSTEMS BEING INOPERABLE. THIS | | ACTION/CONDITION IS REPORTABLE TO THE NRC WITHIN 30 DAYS UNDER | | 10CFR50.73(a)(2)(i)(B) FOR ANY OPERATION OR CONDITION PROHIBITED BY THE | | PLANT'S TECHNICAL SPECIFICATIONS. ADDITIONALLY, THIS EVENT IS REPORTABLE IN | | ACCORDANCE WITH 10CFR50.73(a)(2)(vii) AS ANY EVENT WHERE A SINGLE CAUSE OR | | CONDITION CAUSED AT LEAST ONE INDEPENDENT TRAIN OR CHANNEL TO BECOME | | INOPERABLE IN MULTIPLE SYSTEMS. | | | | THIS 4 HOUR REPORT WAS RETRACTED VIA ENS AT 1715 HOURS ON 9/28/94. | | | | END OF TEXT | | | | THE LICENSEE WILL INFORM THE NRC RESIDENT INSPECTOR. NOTIFIED R2DO(POTTER). | +------------------------------------------------------------------------------+ !!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!!! +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27782 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: MILLSTONE REGION: 1 |NOTIFICATION DATE: 09/13/94 | |UNIT: [ ] [ ] [3] STATE: CT |NOTIFICATION TIME: 22:07 [ET]| |RX TYPE: [1] GE-3,[2] CE,[3] W-4-LP |EVENT DATE: 09/13/94 | +------------------------------------------------+EVENT TIME: 21:36[EDT]| |NRC NOTIFIED BY: O'CONNELL |LAST UPDATE DATE: 09/28/94 | |HQ OPS OFFICER: BOB STRANSKY +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |CONTE RDO | |AINA 50.72(b)(2)(iii)(A) POT UNABLE TO SAFE SD | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | | | | | 3 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | LICENSEE DECLARED THE "B" EMERGENCY DIESEL GENERATOR INOPERABLE DUE TO A | | FAULTY PRESSURE SWITCH ON 1 OF 2 EDG STARTING AIR COMPRESSORS. | | | | WHILE TROUBLESHOOTING A LOW STARTING AIR PRESSURE ALARM FOR THE "B" EDG, | | THE LICENSEE DISCOVERED THAT THE RELIEF VALVE ON ONE OF THE STARTING AIR | | HEADERS HAD LIFTED. THE LICENSEE OBSERVED THAT THE COMPRESSOR WAS NOT | | SHUTTING OFF AUTOMATICALLY, CAUSING THE RELIEF VALVE TO LIFT AND | | DEPRESSURIZING THE STARTING AIR HEADER. THE LICENSEE HAS SECURED THE AIR | | COMPRESSOR, AND HAS CROSS TIED THE STARTING AIR HEADER TO THE REDUNDANT | | STARTING AIR HEADER. | | | | THE UNIT IS CURRENTLY IN A TECHNICAL SPECIFICATION LIMITING CONDITION OF | | OPERATION WHICH PROHIBITS CORE ALTERATIONS UNTIL THE "B" EMERGENCY DIESEL | | GENERATOR IS DECLARED OPERABLE. THE RI WILL BE INFORMED. | | | | *** UPDATE DATE: 9/28/94 UPDATE TIME: 0905 FROM BURTON BY STRANSKY *** | | | | BASED UPON PRIOR TESTING WITH ONE AIR START BANK INOPERABLE, THE LICENSEE | | HAS DETERMINED THAT THE B EDG WOULD HAVE STARTED WITHIN 12.5 SECONDS, WHICH | | WOULD HAVE SATISFIED ALL MODE 5 SAFETY FUNCTIONS. THEREFORE, THE LICNSEE | | WISHES TO RETRACT THIS REPORT. THE RI HAS BEEN INFORMED. NOTIFIED R1DO | | (DURR). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27831 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SOUTH TEXAS REGION: 4 |NOTIFICATION DATE: 09/28/94 | |UNIT: [1] [ ] [ ] STATE: TX |NOTIFICATION TIME: 16:29 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 09/28/94 | +------------------------------------------------+EVENT TIME: 09:57[CDT]| |NRC NOTIFIED BY: JAIRO PINZON |LAST UPDATE DATE: 09/28/94 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |THOMAS WESTERMAN RDO | |NLTR LICENSEE 24 HR REPORT | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | 1 | N Y 100 POWER OPERATION | 100 POWER OPERATION | | | | | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | LICENSEE DISCOVERED THAT BOTH UNIT 1 TOXIC GAS MONITORS WERE INOPERABLE. | | | | "THE FOLLOWING APPLIES TO UNIT 1 ONLY. UNIT 1 IS CURRENTLY IN MODE 1 AT | | 100% POWER." | | | | "AT APPROXIMATELY 0957 HOURS, ON SEPTEMBER 28, 1994, IT WAS DISCOVERED THAT | | TOXIC GAS MONITOR "XE-9327" WAS INOPERABLE. CONTROL ROOM HEATING, | | VENTILATING AND AIR CONDITIONING SYSTEM WAS IMMEDIATELY PLACED IN TOXIC | | RECIRCULATION BECAUSE TOXIC GAS MONITOR "XE-9326" WAS ALREADY INOPERABLE | | (TECHNICAL SPECIFICATION 3.3.3.7)." | | | | "FURTHER INVESTIGATION REVEALED THAT TOXIC GAS MONITOR "XE-9327" HAD BEEN | | INOPERABLE SINCE APPROXIMATELY 0300 HOURS ON SEPTEMBER 28, 1994. THE | | REQUIREMENTS OF TECHNICAL SPECIFICATION 3.3.3.7 WERE NOT MET SINCE THE | | CONTROL ROOM HEATING, VENTILATING AND AIR CONDITIONING SYSTEM WAS NOT | | PLACED IN THE TOXIC GAS RECIRCULATION MODE WITHIN ONE HOUR." | | | | "THIS FAILURE TO PERFORM A REQUIRED ACTION WITHIN THE TIME LIMIT REQUIRED | | BY TECHNICAL SPECIFICATIONS IS REPORTABLE AS A VIOLATION OF PLANT OPERATING | | LICENSE NO. NPF-76 (2G) SECTION 2.c(2) (24 HOUR REPORT)." | | | | A SIMILAR PROBLEM OCCURRED ON 9/23/94 WHICH RENDERED TOXIC GAS MONITOR | | "XE-9326" INOPERABLE (SEE EVENT #27818). THE LICENSEE SUSPECTS THAT THE | | DETECTOR ASSOCIATED WITH TOXIC GAS MONITOR "XE-9327" FAILED AND HAS ISSUED | | A WORK ORDER TO TROUBLESHOOT AND REPAIR BOTH MONITORS. CONTROL ROOM | | HEATING, VENTILATING AND AIR CONDITIONING SYSTEM WILL REMAIN IN RECIRC MODE | | UNDER REPAIRS ARE COMPLETED. THE LICENSEE WILL INFORM THE NRC RESIDENT | | INSPECTOR. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27832 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: DRESDEN REGION: 3 |NOTIFICATION DATE: 09/28/94 | |UNIT: [ ] [2] [ ] STATE: IL |NOTIFICATION TIME: 17:33 [ET]| |RX TYPE: [1] GE-1,[2] GE-3,[3] GE-3 |EVENT DATE: 09/28/94 | +------------------------------------------------+EVENT TIME: 15:00[CDT]| |NRC NOTIFIED BY: JERRY LIZALEK |LAST UPDATE DATE: 09/28/94 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |WAYNE SHAFER RDO | |ADAS 50.72(b)(2)(i) DEG/UNANALYZED COND | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N N 0 COLD SHUTDOWN | 0 COLD SHUTDOWN | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | LICENSEE RESPONSE TO GENERIC LETTER 89-10 (SAFETY-RELATED MOTOR-OPERATED | | VALVE TESTING AND SURVEILLANCE). | | | | "AS A RESULT OF GENERIC LETTER 89-10, POTENTIAL DISCREPANCIES WERE | | IDENTIFIED, ON 6/4/92, BETWEEN THE COMPONENT CONFIGURATION USED IN THE MARK | | 1 PIPING ANALYSIS AND THE AS BUILT CONDITION. THIRTY NINE LINES WERE | | IDENTIFIED WITH POTENTIAL DISCREPANCIES. ON SEPTEMBER 28, 1994 TWO LINES | | WERE DETERMINED TO EXCEED UFSAR ALLOWABLE STRESSES. THESE TWO LINES CONTAIN | | THE "2-1501-19A&B" VALVES. THESE VALVES ARE REQUIRED TO FULFILL THE LOW | | PRESSURE COOLANT INJECTION (LPCI) TORUS SPRAY FUNCTION. AN OPERABILITY | | DETERMINATION "ENC-QE-40.1" CHRON#186845 WAS PERFORMED PREVIOUSLY ON 6/4/92 | | AND IT WAS CONCLUDED THAT THE "2-1501-19A&B" LINE STRESSES REMAIN WITHIN | | OPERABILITY STRESS LIMITS. OF THE THIRTY NINE LINES IDENTIFIED WITH | | POTENTIAL DISCREPANCIES, THIRTY FIVE LINES HAVE BEEN SHOWN TO BE WITHIN | | UFSAR ALLOWABLE STRESSES. TWO LINES REMAIN TO BE ANALYZED. THESE LINES ARE | | THE UNIT 3 LOW PRESSURE COOLANT INJECTION TORUS SPRAY LINES CONTAINING THE | | "3-1501-19A&B" VALVES." | | | | THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. | | | | * * UPDATE AT 0457 ON 09/29/94 BY McDONALD REQUESTED BY HOO JOLLIFFE * * | | | | THE FOLLOWING IS A CLARIFICATION OF THE ABOVE REPORT: | | | | THE ANALYSIS OF THE ADEQUACY OF THE TWO LINES CONTAINING THE LPCI TORUS | | SPRAY VALVES (#2-1501-19A & B) PERFORMED IN 1992 WAS BASED ON ENGINEERING | | DESIGN DOCUMENTS. THE REANALYSIS OF THE ADEQUACY OF THESE SAME TWO LINES | | AND VALVES PERFORMED IN 1994 WAS BASES ON FIELD WALKDOWNS OF THE INSTALLED | | EQUIPMENT AS WELL AS ENGINEERING DESIGN DOCUMENTS. | | | | THIS REANALYSIS SHOWED THAT 35 OF 39 LINES AND VALVES IN QUESTION ARE | | ADEQUATE. THE UNIT 2 LPCI TORUS SPRAY LINES AND VALVES WERE DETERMINED | | TO EXCEED UFSAR ALLOWABLE STRESS LIMITS. LICENSEE IS ANALYZING THE UNIT 3 | | LPCI TORUS SPRAY LINES AND VALVES. | | | | LICENSEE HAS BEEN IN CONTACT WITH REGION 3 ON THIS ISSUE. | | | | HOO NOTIFIED R3DO SHAFER. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |OTHER NUCLEAR MATERIAL | |EVENT NUMBER: 27833 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |LICENSEE: HULL AND ASSOCIATES |NOTIFICATION DATE: 09/28/94 | | CITY: TOLEDO REGION: 3 |NOTIFICATION TIME: 18:03 [ET]| | COUNTY: LUCAS STATE: OH |EVENT DATE: 09/28/94 | |LICENSE#: 34-24957-01 AGREEMENT: N |EVENT TIME: 17:30[EDT]| | DOCKET: |LAST UPDATE DATE: 09/28/94 | | +-----------------------------+ | |PERSON ORGANIZATION| | |WAYNE SHAFER RDO | | |CHARLEY HAUGHNEY EO | +------------------------------------------------+ | |NRC NOTIFIED BY: JOHN WATKINS | | |HQ OPS OFFICER: STEVE SANDIN | | +------------------------------------------------+ | |EMERGENCY CLASS: NOT APPLICABLE | | |10 CFR SECTION: | | |NDAM DAMAGE MEASURE GAUGE | | | | | | | | | | | | | | +------------------------------------------------+-----------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | NUCLEAR SOIL DENSITOMETER CASE DESTROYED BY EARTHMOVER. | | | | AT APPROXIMATELY 1730CDT ON 9/28/94 A TECHNICIAN USING A NUCLEAR SOIL | | DENSITOMETER WAS TAKING A MOISTURE DENSITY READING WHEN A PIECE OF | | EARTHMOVING EQUIPMENT CRESTED THE BERM CAUSING THE TECHNICIAN TO JUMP OUT | | OF THE WAY BEFORE RETRACTING THE CESIUM SOURCE. THE RIGHT FRONT TIRE OF THE | | EARTHMOVER CRUSHED THE CASE OF THE DENSITOMETER AND DISCONNECTED THE CESIUM | | PROBE WHICH IS STILL EMBEDDED IN THE CLAY. THE TECHNICIAN ORDERED THE | | OPERATOR TO EVACUATE, CORDONED OFF THE AREA IN A 15 FT RADIUS WITH YELLOW | | TAPE AND FURTHER RESTRICTED ACCESS WITHIN 500 FT. THE DAMAGED UNIT IS | | MANUFACTURED BY CPN PORTA-PROBE IN MARTINEZ, CA, AND IS A MODEL #MC-3 | | CONTAINING TWO (2) SOURCES: 10 mCi CESIUM-137 AND 50 mCi AMERICIUM-241. THE | | AMERICIUM SOURCE WAS VISUALLY VERIFIED INTACT IN THE DAMAGED CASE. THE | | LICENSEE, HULL AND ASSOCIATES LOCATED AT 2726 MONROE STREET, TOLEDO, OH | | 43606 [419-241-7171], HAVE CONTACTED THE OHIO SERVICE REP, WILLIE CLINE, | | 5615 FOSNAUGH SCHOOL ROAD, STOUTSVILLE, OH 43154 [614-969-2720], WHO IS | | EXPECTED TO BE ONSITE AT THE TREMONT LANDFILL LOCATED IN CLARK COUNTY AT | | 3108 SNYDER-DORMER ROAD, SPRINGFIELD, OH 45502, SOMETIME TONIGHT BETWEEN | | 2000 AND 2030EDT. THE LICENSEE IS NOT REQUESTING NRC ASSISTANCE AND HAS NOT | | CONTACTED ANY STATE OR LOCAL AGENCIES. | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27834 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: HATCH REGION: 2 |NOTIFICATION DATE: 09/28/94 | |UNIT: [ ] [2] [ ] STATE: GA |NOTIFICATION TIME: 19:33 [ET]| |RX TYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 09/28/94 | +------------------------------------------------+EVENT TIME: 19:20[CDT]| |NRC NOTIFIED BY: JAMES BARNES |LAST UPDATE DATE: 09/28/94 | |HQ OPS OFFICER: STEVE SANDIN +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JOHN POTTER RDO | |ASHU 50.72(b)(1)(i)(A) PLANT S/D REQD BY TS | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N Y 100 POWER OPERATION | 98 POWER OPERATION | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | UNIT 2 COMMENCED A TS REQUIRED SHUTDOWN DUE TO OXYGEN CONCENTRATION IN THE | | TORUS REGION EXCEEDING 4%. | | | | BOTH THE TORUS AND DRYWELL AS PART OF PRIMARY CONTAINMENT ARE INERTED WITH | | NITROGEN DURING OPERATION. AT 1445EDT ON 9/28/94 DURING WEEKLY TESTING OF | | THE TORUS OXYGEN CONCENTRATION, THE LICENSEE HAD READINGS OF APPROXIMATELY | | 5.5% WHICH IS IN EXCESS OF THE 4% ALLOWED. THIS PLACED UNIT 2 IN TECH SPEC | | LCO A/S 3/6.6.4 WHICH REQUIRES THAT THE OXYGEN CONCENTRATION BE REDUCED TO | | LESS THAN 4% OR THAT THE MODE SWITCH BE PLACED IN STARTUP WITHIN 8 HOURS. | | THE LICENSEE HAS COMMENCED A PRECAUTIONARY SHUTDOWN WHILE INVESTIGATING TO | | DETERMINE THE CAUSE OF THE LEAKAGE. CURRENT OXYGEN LEVEL IN THE TORUS IS | | SLIGHTLY LESS THAN 5% WITH DRYWELL READINGS OF 2.9-3%. THE LICENSEE | | INFORMED THE NRC RESIDENT INSPECTOR. | | | | * * * UPDATE 2145EDT 9/28/94 FROM MUSGROVE TO S.SANDIN * * * | | UNIT 2 EXITED THE TECH SPEC REQUIRED SHUTDOWN AT 75% POWER AT 2145EDT BY | | REINERTING THE PRIMARY CONTAINMENT TO APPROXIMATELY 3.5% OXYGEN. THE | | LICENSEE WILL CONTINUE THE INVESTIGATION AND HAS INFORMED THE NRC RESIDENT | | INSPECTOR. NOTIFIED R2DO(POTTER). | +------------------------------------------------------------------------------+ +----------------------------------+ +-----------------------+ |POWER REACTOR | |EVENT NUMBER: 27835 | +----------------------------------+ +-----------------------+ +------------------------------------------------+-----------------------------+ |FACILITY: SALEM REGION: 1 |NOTIFICATION DATE: 09/29/94 | |UNIT: [ ] [2] [ ] STATE: NJ |NOTIFICATION TIME: 03:23 [ET]| |RX TYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 09/29/94 | +------------------------------------------------+EVENT TIME: 02:32[EDT]| |NRC NOTIFIED BY: GWIRTZ |LAST UPDATE DATE: 09/29/94 | |HQ OPS OFFICER: DICK JOLLIFFE +-----------------------------+ +------------------------------------------------+ NOTIFICATIONS | |EMERGENCY CLASS: NOT APPLICABLE +-----------------------------+ |10 CFR SECTION: |JACK DURR RDO | |ARPS 50.72(b)(2)(ii) RPS ACTUATION | | | | | | | | | | | | | | +-----+----------+-------+--------+--------------+--+--------+-----------------+ |UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE | +-----+----------+-------+--------+-----------------+--------+-----------------+ | | | | | 2 | N Y 28 POWER OPERATION | 0 HOT STANDBY | | | | | +-----+---------------------------------------------+--------------------------+ EVENT TEXT +------------------------------------------------------------------------------+ | - MANUAL Rx TRIP FROM 28% POWER DUE TO CONTROL ROOM OPERATOR ERROR - | | | | A CONTROL ROOM CONSOLE REACTOR OPERATOR WAS DIRECTED TO CLOSE THE STEAM | | TRAP ISOLATION VALVES (#21MS7, #22MS7, #23MS7, & #24MS7) UPSTREAM OF THE | | MAIN STEAM ISOLATION VALVES (MSIVs) BUT HE MISTAKENLY CLOSED THE MSIVs | | (#21MS167 & #22MS167) TO STEAM GENERATORS #21 & #22. THE CONTROLS FOR | | THESE VALVES ARE LOCATED IN THE SAME AREA OF THE CONSOLE. | | | | AT 0232, AFTER REALIZING THE MISTAKE, CONTROL ROOM OPERATORS MANUALLY | | TRIPPED UNIT 2 FROM 28% POWER. ALL CONTROL RODS INSERTED COMPLETELY. | | NO SAFETY OR RELIEF VALVES LIFTED. | | | | AT 0237, CONTROL ROOM OPERATORS CLOSED THE MSIVs (#23MS167 & #24MS167) | | TO STEAM GENERATORS #23 & #24 TO ISOLATE THE MAIN STEAM SYSTEM DUE TO | | REACTOR COOLANT SYSTEM TEMPERATURE DECREASING TO 530 DEGREES F FROM A | | NORMAL OPERATING TEMPERATURE OF 547 DEGREES F. | | | | STEAM IS BEING DUMPED TO THE ATMOSPHERE. | | | | UNIT 2 IS STABLE IN MODE 3 (HOT STANDBY). | | | | ALL SYSTEMS FUNCTIONED AS DESIGNED. | | | | LICENSEE PLANS TO COMPLETE THE POST TRIP REVIEW AND RECOMMENCE PLANT | | STARTUP BASED ON THAT REVIEW. | | | | LICENSEE INFORMED THE NRC RESIDENT INSPECTOR AND LOCAL OFFICIALS. | +------------------------------------------------------------------------------+