Event Notification Report for November 23, 1999
U.S. Nuclear Regulatory Commission
Operations Center
Event Reports For
11/22/1999 - 11/23/1999
** EVENT NUMBERS **
36456 36457
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 36456 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: COOK REGION: 3 |NOTIFICATION DATE: 11/22/1999|
| UNIT: [1] [2] [] STATE: MI |NOTIFICATION TIME: 06:33[EST]|
| RXTYPE: [1] W-4-LP,[2] W-4-LP |EVENT DATE: 11/22/1999|
+------------------------------------------------+EVENT TIME: 06:05[EST]|
| NRC NOTIFIED BY: MARY BETH DEPUYDT |LAST UPDATE DATE: 11/22/1999|
| HQ OPS OFFICER: FANGIE JONES +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |THOMAS KOZAK 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 N 0 Refueling |0 Refueling |
|2 N N 0 Refueling |0 Refueling |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| SECURITY REPORT |
| |
| Safeguards system degradation related to access control, immediate |
| compensatory measures taken upon discovery. |
| |
| The licensee intends to notify the NRC Resident Inspector. |
| |
| Refer to the HOO Log for additional details. |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
|Power Reactor |Event Number: 36457 |
+------------------------------------------------------------------------------+
+------------------------------------------------------------------------------+
| FACILITY: BROWNS FERRY REGION: 2 |NOTIFICATION DATE: 11/22/1999|
| UNIT: [] [2] [] STATE: AL |NOTIFICATION TIME: 23:18[EST]|
| RXTYPE: [1] GE-4,[2] GE-4,[3] GE-4 |EVENT DATE: 11/18/1999|
+------------------------------------------------+EVENT TIME: 19:00[CST]|
| NRC NOTIFIED BY: CHRIS VAUGHN |LAST UPDATE DATE: 11/22/1999|
| HQ OPS OFFICER: JOHN MacKINNON +-----------------------------+
+------------------------------------------------+PERSON ORGANIZATION |
|EMERGENCY CLASS: N/A |EDWARD MCALPINE R2 |
|10 CFR SECTION: | |
|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 100 Power Operation |100 Power Operation |
| | |
+------------------------------------------------------------------------------+
EVENT TEXT
+------------------------------------------------------------------------------+
| HIGH PRESSURE COOLANT INJECTION (HPCI) OIL SYSTEM PRESSURE BOUNDARY |
| BREACHED |
| |
| At approximately 1636 CST on 11/18/99, during replacement of the Unit 2 HPCI |
| Oil Cooler Discharge Temperature Switch by Instrument Maintenance, the |
| pressure boundary of the HPCI oil system was inadvertently breached for a |
| total of approximately five minutes (the work package assumed that the |
| Temperature Switch had a well, but it when the Temperature Switch was |
| removed it was discovered that Switch did not have a well). The breach |
| occurred because adequate documentation was not included in the work |
| package. The switch was successfully replaced and the work document |
| subsequently completed and closed out at 2005 CST on 11/18/99. Upon further |
| evaluation of this work activity by Site Engineering and Operations |
| personnel, it has been determined that the HPCI system would not have been |
| capable of performing its intended design function during the time frame the |
| oil system was breached. |
| |
| The NRC Resident Inspector was notified of this event by the licensee. |
+------------------------------------------------------------------------------+
Page Last Reviewed/Updated Wednesday, March 24, 2021