| U.S. Nuclear Regulatory Commission
Operations Center Event Reports For
06/01/2004 - 06/02/2004 ** EVENT NUMBERS ** |
 | !!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!! | | Power Reactor | Event Number: 40684 | Facility: NINE MILE POINT
Region: 1 State: NY
Unit: [ ] [2] [ ]
RX Type: [1] GE-2,[2] GE-5
NRC Notified By: DAVE RICHARDSON
HQ OPS Officer: ARLON COSTA | Notification Date: 04/18/2004
Notification Time: 23:45 [ET]
Event Date: 04/18/2004
Event Time: 18:30 [EDT]
Last Update Date: 06/01/2004 | Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
| Person (Organization):
BRIAN MCDERMOTT (R1)
|
| Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode | | 2 | N | N | 0 | Cold Shutdown | 0 | Cold Shutdown | Event Text RESIDUAL HEAT REMOVAL SYSTEM ISOLATION DUE TO A RISE IN REACTOR PRESSURE
"At 1830 hours on 18 April 2004, Nine Mile Point Unit 2 was restoring from reactor pressure vessel leakage test.
"Reactor pressure was ~82 psi, temperature ~178 degrees, reactor level was solid with both reactor recirculation pumps running in slow speed per the leak test procedure.
" 'B' residual heat removal system was being warmed up in preparation for going in to service. Reactor water cleanup reject from the vessel was secured to maintain RPV [Reactor Pressure Vessel] pressure stable in order to provide driving head for flow through the residual heat removal discharge line to radwaste. The line is warmed up from the reactor, back through the Shutdown cooling isolation valve, to radwaste prior to placing shutdown cooling in service. When warm-up criteria are met, the operating procedure directs securing flow.
When flow was secured, this effectively isolated the solid reactor vessel, resulting in a rise in reactor pressure. Pressure peaked at ~146 psi before operators established reactor water cleanup reject flow.
"When RPV pressure reached 128 psi, the residual heat removal system isolation was automatically initiated as designed. The shutdown cooling injection valve, which was open to support piping warm-up, closed as designed. All other shutdown cooling valves were closed prior to the event per the warm-up lineup."
RPV is currently depressurized with shutdown cooling in service. All systems are functioning as expected.
The licensee notified the NRC Resident Inspector.
* * * Retraction on 06/01/04 at 1512 EDT from Chris Skinner to John MacKinnon * * *
"The following is a retraction of ENS Notification #40684: On April 18, 2004, Nine Mile Point Unit 2 reported Residual Heat Removal Shutdown Cooling System isolated due to a pressure spike while warming up the piping. The shutdown cooling injection valve, which was open to support piping warm-up, closed as designed. All other shutdown cooling valves were closed prior to the event per the warm-up lineup. Accordingly, Control Room personnel conservatively initiated ENS reporting under 10CFR50.72(b)(3)(iv)(A) in response to the valid containment isolation signal.
"Subsequent analysis has concluded that, although the isolation signal was valid, it was not a general containment isolation signal (i.e., the isolation signal only involved the shutdown cooling system) and the shutdown cooling function of the Residual Heat Removal System is not listed under 10CFR50.72(b)(3)(iv)(B) as a system that is required to be reportable. This system isolation does not meet the reporting requirements of 10CFR50.72(b)(3)(iv)(A).
"Therefore, this notification made on April 18, 2004, is being retracted. The NRC Resident Inspector was notified."
NRC R1DO (Ron Bellamy) notified. |
| General Information or Other | Event Number: 40781 | Rep Org: FLORIDA BUREAU OF RADIATION CONTROL
Licensee: US SOUTH ENGINEERING & TESTING LAB INC
Region: 1
City: Miami State: FL
County:
License #:
Agreement: Y
Docket:
NRC Notified By: ED GHANTT
HQ OPS Officer: MIKE RIPLEY | Notification Date: 05/28/2004
Notification Time: 12:43 [ET]
Event Date: 05/28/2004
Event Time: 11:15 [EDT]
Last Update Date: 05/28/2004 | Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
| Person (Organization):
RICHARD CONTE (R1)
LINDA PSYK-GERSEY (NMSS)
| Event Text FLORIDA AGREEMENT STATE REPORT - STOLEN DENSITY GAUGE
A Troxler Moisture Density Gauge, Model #3440 (Serial #27071 containing 40 millicuries Am-241/Be and 8 millicuries Cs-137) was stolen from the licensee's truck at a construction site in Miami, FL. A chain locking the gauge to the truck was cut. The licensee notified the Miami Police Dept. who are investigating. |
| Power Reactor | Event Number: 40786 | Facility: COOPER
Region: 4 State: NE
Unit: [1] [ ] [ ]
RX Type: [1] GE-4
NRC Notified By: STEVEN JOBE
HQ OPS Officer: BILL GOTT | Notification Date: 06/02/2004
Notification Time: 00:42 [ET]
Event Date: 06/01/2004
Event Time: 19:15 [CDT]
Last Update Date: 06/02/2004 | Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
| Person (Organization):
GARY SANBORN (R4)
|
| Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode | | 1 | N | Y | 100 | Power Operation | 100 | Power Operation | Event Text HPCI DECLARED INOPERABLE
"High Pressure Coolant Injection [HPCI] system was declared inoperable due to failure of alarm 'HPCI Turbine Exhaust Drain Pot Hi Level' to clear. The level switch associated with the alarm is the suspected failed component. When the line is drained there is evidence of water flow but the alarm does not clear. There are no other indications of the exhaust drain line filling with water.
"As a precautionary measure, the HPCI auxiliary oil pump has been placed in pull-to-lock, which will prevent the auto initiation of HPCI. HPCI will be manually started when required and proper operations assessed to ensure the exhaust line is intact. Hourly draining of the HPCI turbine exhaust drain line has been instituted based on the previously established frequency of the alarm.
"HPCI is considered available.
"All remaining ECCS systems are operable.
"The NRC Senior Resident Inspector has been notified of this event." | |