United States Nuclear Regulatory Commission - Protecting People and the Environment
Home > NRC Library > Document Collections > Reports Associated With Events > Event Notification Reports > 2000

Event Notification Report for May 17, 2000

                    U.S. Nuclear Regulatory Commission
                              Operations Center

                              Event Reports For
                           05/16/2000 - 05/17/2000

                              ** EVENT NUMBERS **

36961  37001  37007  

!!!!!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED  !!!!!!!
+------------------------------------------------------------------------------+
|Power Reactor                                    |Event Number:   36961       |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: POINT BEACH              REGION:  3  |NOTIFICATION DATE: 05/03/2000|
|    UNIT:  [1] [2] []                STATE:  WI |NOTIFICATION TIME: 12:40[EDT]|
|   RXTYPE: [1] W-2-LP,[2] W-2-LP                |EVENT DATE:        05/03/2000|
+------------------------------------------------+EVENT TIME:        10:45[CDT]|
| NRC NOTIFIED BY:  DON POPP                     |LAST UPDATE DATE:  05/16/2000|
|  HQ OPS OFFICER:  WILLIAM POERTNER             +-----------------------------+
+------------------------------------------------+PERSON          ORGANIZATION |
|EMERGENCY CLASS:          N/A                   |BRUCE BURGESS        R3      |
|10 CFR SECTION:                                 |                             |
|DDDD 73.71               UNSPECIFIED PARAGRAPH  |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR|   INIT RX MODE  |CURR PWR|  CURR RX MODE   |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|1     N          Y       100      Power Operation  |100      Power Operation  |
|2     N          Y       100      Power Operation  |100      Power Operation  |
|                                                   |                          |
+------------------------------------------------------------------------------+
                                   EVENT TEXT                                   
+------------------------------------------------------------------------------+
| 1 HOUR SECURITY REPORT                                                       |
|                                                                              |
| Unescorted protected area access granted inappropriately.  Immediate         |
| compensatory measures taken.                                                 |
|                                                                              |
| The licensee will notify the NRC Resident Inspector.                         |
|                                                                              |
| Contact the Headquarters Operations Center for additional details            |
|                                                                              |
| * * * RETRACTION ON 05/16/00 AT 1128 ET BY BRAIN KOPETSKI TAKEN BY MACKINNON |
| * * *                                                                        |
|                                                                              |
| After further review  of this event and conversations with NRC Region 3 this |
| event is being retracted. The event is being made a loggable because the     |
| person's access  denial would  not have in itself been enough to deny        |
| access.  R3DO (John Madera) notified.                                        |
|                                                                              |
| The NRC Resident Inspector was notified of this retraction by the licensee.  |
+------------------------------------------------------------------------------+

+------------------------------------------------------------------------------+
|Power Reactor                                    |Event Number:   37001       |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: DIABLO CANYON            REGION:  4  |NOTIFICATION DATE: 05/15/2000|
|    UNIT:  [1] [] []                 STATE:  CA |NOTIFICATION TIME: 04:04[EDT]|
|   RXTYPE: [1] W-4-LP,[2] W-4-LP                |EVENT DATE:        05/15/2000|
+------------------------------------------------+EVENT TIME:        00:43[PDT]|
| NRC NOTIFIED BY:  STEVE HACKLEMAN              |LAST UPDATE DATE:  05/16/2000|
|  HQ OPS OFFICER:  DICK JOLLIFFE                +-----------------------------+
+------------------------------------------------+PERSON          ORGANIZATION |
|EMERGENCY CLASS:          UNU                   |CHARLES CAIN         R4      |
|10 CFR SECTION:                                 |JOSE CALVO           NRR     |
|AAEC 50.72 (a) (1) (I)   EMERGENCY DECLARED     |JOSEPH GIITTER       IRO     |
|ARPS 50.72(b)(2)(ii)     RPS ACTUATION          |EACHES               FEMA    |
|AESF 50.72(b)(2)(ii)     ESF ACTUATION          |JOSEPH HIMES         RCT     |
|NOCM                     COMM ASST BRIEF        |                             |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|UNIT |SCRAM CODE|RX CRIT|INIT PWR|   INIT RX MODE  |CURR PWR|  CURR RX MODE   |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|1     A/R        Y       100      Power Operation  |0        Hot Standby      |
|                                                   |                          |
|                                                   |                          |
+------------------------------------------------------------------------------+
                                   EVENT TEXT                                   
+------------------------------------------------------------------------------+
| UNUSUAL EVENT DUE TO AUXILIARY TRANSFORMER EXPLOSION & FIRE; LOSS OF OFFSITE |
| POWER -                                                                      |
|                                                                              |
| At 0043 PDT on 05/15/00, the licensee declared an Unusual Event due to       |
| auxiliary transformer #1-1 exploding and catching on fire.  This resulted in |
| the loss of offsite power and an automatic trip of Unit 1.  The licensee     |
| called the offsite fire department and they responded to the plant.          |
| Auxiliary transformer #1-1 is located outside the turbine building (north    |
| end).                                                                        |
|                                                                              |
| Three of three Unit 1 emergency diesel generators started and loaded and are |
| supplying emergency power to vital Unit 1 buses.  Auxiliary transformer #1-1 |
| supplies backup power to Unit 1 emergency buses.  The Unit 1 12 KV buses are |
| energized.  Unit 1 reactor coolant pumps are running providing forced        |
| circulation.                                                                 |
|                                                                              |
| Unit 1 automatically tripped from 100% power.  All control rods inserted     |
| completely.  Steam is being dumped to the atmosphere.  Unit 1 has no steam   |
| generator tube leaks and no fuel leaks.  The auxiliary feedwater system      |
| automatically started, as expected.  A #1-2 steam generator code safety      |
| valve failed open for about 25 - 30 minutes about 30 minutes after the       |
| reactor trip.  The valve is now closed.  There was no safety injection       |
| actuation.                                                                   |
|                                                                              |
| Unit 1 is stable in Mode 3 (Hot Standby).                                    |
|                                                                              |
| This event had no effect on Unit 2 which is stable at 100% power.            |
|                                                                              |
| The licensee notified state and local officials and the NRC Resident         |
| Inspector.                                                                   |
|                                                                              |
| At 0143 PDT, the fire is out.  No personnel were injured.                    |
|                                                                              |
| At 0405 CDT, NRC Region 4 entered the Monitoring Phase of Normal NRC         |
| Response Mode.                                                               |
|                                                                              |
| * * * UPDATE AT 0726 ON 05/15/00 FROM MARK LEMKE TO JOLLIFFE * * *           |
|                                                                              |
| The licensee determined that an electrical fault on the low voltage side of  |
| auxiliary transformer #1-1 caused extensive damage to the 12 KV buswork and  |
| nearby buswork used to supply the Unit 1 4 KV buses from offsite power       |
| following a plant shutdown.  Auxiliary transformer #1-1 did not explode and  |
| is intact.                                                                   |
|                                                                              |
| The licensee also determined that there was not a failure of a main steam    |
| code safety valve.  However, following closure of the main steam isolation   |
| valves, a code safety valve on the #1-2 steam generator did lift and did not |
| fully reseat.  Plant operators took manual action to lower steam generator   |
| pressure, causing the valve to reseat.  There was no release of radiation    |
| from the plant.                                                              |
|                                                                              |
| The California Department of Forestry responded to the site.                 |
|                                                                              |
| The licensee is continuing to investigate the cause of this explosion and    |
| has issued a press release.                                                  |
|                                                                              |
| * * * AT 0900 ON 05/15/00 COMMISSIONERS' ASSISTANTS BRIEFING * * *           |
|                                                                              |
| IRO (Frank Congel, Joe Giitter); NRR Projects (Steve Dembek); OPA (Bill      |
| Beecher); OSP (Cardelia Maupin); IP (Howard Faulkner); CA (Tom Combs);       |
| Chairman Meserve Asst (Mike Tschiltz); Comm Dicus Asst (Joe Olencz); Comm    |
| McGaffigan Asst (Jeff Sharkey); Comm Diaz Asst (Tony Hsia); Comm Merrifield  |
| Asst (John Thoma); NRR (Ed Goodwin); R4 (Elmo Collins [Briefer], Bill Jones, |
| et al).                                                                      |
|                                                                              |
| * * * UPDATE AT 1358 EDT ON 5/16/00 BY D. PETERSON TO FANGIE JONES * * *     |
|                                                                              |
| The licensee terminated the Unusual Event at 0959 PDT.  Offsite power has    |
| been restored to the 4 KV vital busses.  The diesel generators have been     |
| shutdown.  The RCS temperature is 380 F and pressure is 920 psig.  The      |
| plant will continue to Cold Shutdown after chemistry hold is complete.       |
|                                                                              |
| The licensee notified the NRC Resident Inspector. The NRC Headquarters       |
| Operation Officer notified the R4DO (Bill Jones), IRO (Joseph Giitter), NRR  |
| (William Beckner), EDO Office (Mark Satorius), PAO (Sue Gagner), FEMA        |
| (Austin).                                                                    |
|                                                                              |
| NRC Region 4 exited the Monitoring Phase of Normal Mode at 1414 EDT.         |
+------------------------------------------------------------------------------+

+------------------------------------------------------------------------------+
|Power Reactor                                    |Event Number:   37007       |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: SUMMER                   REGION:  2  |NOTIFICATION DATE: 05/16/2000|
|    UNIT:  [1] [] []                 STATE:  SC |NOTIFICATION TIME: 07:28[EDT]|
|   RXTYPE: [1] W-3-LP                           |EVENT DATE:        05/15/2000|
+------------------------------------------------+EVENT TIME:        09:30[EDT]|
| NRC NOTIFIED BY:  CHUCK McKINNEY               |LAST UPDATE DATE:  05/16/2000|
|  HQ OPS OFFICER:  DICK JOLLIFFE                +-----------------------------+
+------------------------------------------------+PERSON          ORGANIZATION |
|EMERGENCY CLASS:          N/A                   |BRIAN BONSER         R2      |
|10 CFR SECTION:                                 |                             |
|HFIT 26.73               FITNESS FOR DUTY       |                             |
|                                                |                             |
|                                                |                             |
|                                                |                             |
+-----+----------+-------+--------+-----------------+--------+-----------------+
|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                                   
+------------------------------------------------------------------------------+
| 24 HOUR FITNESS FOR DUTY EVENT -                                             |
|                                                                              |
| At 0930 on 05/15/00, a licensee supervisor tested positive for alcohol       |
| during a random drug and alcohol test. The licensee withdrew the employee's  |
| access authorization to the plant protected area after verification of the   |
| positive test.  The licensee is determining further corrective actions.      |
|                                                                              |
| The licensee notified the NRC Resident Inspector.                            |
+------------------------------------------------------------------------------+