Event Notification Report for February 2, 1999
U.S. Nuclear Regulatory Commission
Operations Center
Event Reports For
02/01/1999 - 02/02/1999
** EVENT NUMBERS **
35336 35337 35338
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 35336 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: SAN ONOFRE REGION: 4 |NOTIFICATION DATE: 02/01/1999|
| UNIT: [] [2] [] STATE: CA |NOTIFICATION TIME: 13:30[EST]|
| RXTYPE: [1] W-3-LP,[2] CE,[3] CE |EVENT DATE: 02/01/1999|
+------------------------------------------------+EVENT TIME: 10:09[PST]|
| NRC NOTIFIED BY: BOB CONOSCENTI |LAST UPDATE DATE: 02/01/1999|
| HQ OPS OFFICER: STEVE SANDIN +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: UNU |JEFF SHACKELFORD R4 |
|10 CFR SECTION: |ROBERT DENNIG EO |
|AAEC 50.72(a)(1)(i) EMERGENCY DECLARED |STUART RUBIN IRO |
| |GENE CANUPP FEMA |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR| INIT RX MODE |CURR PWR| CURR RX MODE |
+-----+----------+-------+--------+-----------------+--------+-----------------+
| | |
|2 N N 0 Refueling |0 Refueling |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| UNIT 2 DECLARED AN UNUSUAL EVENT DUE TO A LOSS OF SHUTDOWN COOLING GREATER |
| THAN 10 MINUTES |
| |
| MAINTENANCE PERSONNEL WERE PREPARING TO RACK OUT ELECTRICAL BREAKER |
| "2A04-18", WHEN THE BREAKER UNEXPECTEDLY CLOSED. THIS BREAKER, WHICH WAS |
| OUT-OF-SERVICE AT THE TIME, SUPPLIES POWER TO THE 4160 VAC CLASS 1-E BUS |
| "2A04" FROM THE RESERVE AUXILIARY TRANSFORMER. AS A RESULT, AT 1009 PST THE |
| "2A04" BUS DEENERGIZED CAUSING A LOSS OF BOTH THE OPERATING TRAIN "A" |
| SHUTDOWN COOLING PUMP AND THE CROSS-TIED CONTAINMENT SPRAY PUMP "A" WHICH |
| WAS SUPPLYING SPENT FUEL POOL COOLING. THE STANDBY EMERGENCY DIESEL |
| GENERATOR AUTOSTARTED BUT DID NOT CLOSE ONTO THE BUS DUE TO A PROTECTIVE |
| RELAY LOCKOUT. CORE ALTERATIONS WERE SUSPENDED. AT 1014 PST, THE "2A04" |
| BUS WAS REENERGIZED AND AT 1025 PST SHUTDOWN COOLING FLOW WAS RESTORED. |
| DURING THE 16 MINUTES THAT SHUTDOWN COOLING WAS LOST, INDICATED TEMPERATURE |
| AS MEASURED BY TWO (2) SENSORS IN DIFFERENT LOCATIONS INCREASED FROM 72�F TO |
| 74�F AND 77�F TO 80�F, RESPECTIVELY. |
| |
| UNIT 3 WAS IN THE PROCESS OF VERIFYING OFFSITE POWER SUPPLIES AS REQUIRED BY |
| SURVEILLANCE SINCE THE "2A04" BUS CAN BE CROSS-TIED TO UNIT 3. |
| |
| THE LICENSEE IS CONDUCTING AN INVESTIGATION TO DETERMINE ROOT CAUSE. UNIT 2 |
| EXITED THE UNUSUAL EVENT AT 1040 PST. THE LICENSEE INFORMED THE STATE AND |
| THE NRC RESIDENT INSPECTOR. |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 35337 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: HATCH REGION: 2 |NOTIFICATION DATE: 02/01/1999|
| UNIT: [] [2] [] STATE: GA |NOTIFICATION TIME: 17:30[EST]|
| RXTYPE: [1] GE-4,[2] GE-4 |EVENT DATE: 02/01/1999|
+------------------------------------------------+EVENT TIME: 16:10[EST]|
| NRC NOTIFIED BY: BRUCE BUTLER |LAST UPDATE DATE: 02/01/1999|
| HQ OPS OFFICER: STEVE SANDIN +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |BRIAN BONSER R2 |
|10 CFR SECTION: | |
|AESF 50.72(b)(2)(ii) ESF ACTUATION | |
| | |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|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
+------------------------------------------------------------------------------+
| UNIT 2 EXPERIENCED A SPURIOUS ESF ACTUATION OF TWO DRYWELL ISOLATION VALVES |
| DURING BULB REPLACEMENT ON THE DRYWELL WIDE RANGE RADIATION MONITOR. |
| |
| "I&C PERSONNEL WERE REPLACING THE GREEN NORMAL/RESET PUSHBUTTON LIGHT BULB |
| FOR DRYWELL WIDE RANGE RADIATION MONITOR '2D11-K621B' WHEN THE AMBER HIGH |
| LIGHT LIT UP ON THE MONITOR RESULTING IN TWO 18 INCH PRIMARY CONTAINMENT |
| PURGE AND VENT VALVES, '2T48-F320' AND '2T48-F308', GOING CLOSED. THE |
| NORMAL/RESET PUSHBUTTON WAS BEING DEPRESSED IN THE LIGHT HOLDER WHEN THE |
| AMBER HIGH LIGHT CAME ON AND IMMEDIATELY RESET. THIS EVENT WAS CAUSED BY A |
| SPURIOUS SIGNAL. [THERE WAS NO ACTUAL] HIGH RADIATION CONDITION IN THE |
| DRYWELL. A DEFICIENCY IS BEING INITIATED [AS PART OF THE INVESTIGATION]. " |
| |
| BOTH VALVES WERE SUBSEQUENTLY REOPENED AND THE LICENSEE WILL INFORM THE NRC |
| RESIDENT INSPECTOR. |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 35338 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: FT CALHOUN REGION: 4 |NOTIFICATION DATE: 02/01/1999|
| UNIT: [1] [] [] STATE: NE |NOTIFICATION TIME: 23:30[EST]|
| RXTYPE: [1] CE |EVENT DATE: 02/01/1999|
+------------------------------------------------+EVENT TIME: 20:15[CST]|
| NRC NOTIFIED BY: LARRY LEES |LAST UPDATE DATE: 02/01/1999|
| HQ OPS OFFICER: STEVE SANDIN +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |JEFF SHACKELFORD R4 |
|10 CFR SECTION: | |
|APRE 50.72(b)(2)(vi) OFFSITE NOTIFICATION | |
| | |
| | |
| | |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|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
+------------------------------------------------------------------------------+
| OFFSITE ASSISTANCE REQUESTED FROM THE BLAIR VOLUNTEER FIRE DEPARTMENT DUE TO |
| A REPORT OF SMOKE IN THE TRAINING FACILITY. |
| |
| WHILE CLEANING THE NORTHEAST END OF TRAINING FACILITY, WHICH IS LOCATED |
| OUTSIDE THE PROTECTED AREA, SMOKE AND A BURNING SMELL WERE NOTED BY A MEMBER |
| OF THE JANITORIAL STAFF. THE CONTROL ROOM WAS NOTIFIED AND DISPATCHED AN |
| OPERATOR WITH A SECURITY GUARD TO INVESTIGATE. ASSISTANCE WAS REQUESTED |
| FROM THE BLAIR VOLUNTEER FIRE DEPARTMENT (VFD) WHO RESPONDED TO THE SCENE. |
| THE SOURCE OF THE SMOKE WAS A FAILED RESISTIVE HEATING ELEMENT IN THE |
| VENTILATION DUCTING. POWER WAS REMOVED FROM THE HEATER AT 2115 CDT AND THE |
| BLAIR VFD WAS RELEASED. |
| |
| THE LICENSEE INFORMED THE NRC RESIDENT INSPECTOR. |
+------------------------------------------------------------------------------+
Page Last Reviewed/Updated Thursday, March 25, 2021