Event Notification Report for September 23, 2001
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
09/22/2001 - 09/23/2001
EVENT NUMBERS
38307
Power Reactor
Event Number: 38307
Facility: WATTS BAR
Region: 2 State: TN
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: BEN HUNT
HQ OPS Officer: JOHN MacKINNON
Region: 2 State: TN
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: BEN HUNT
HQ OPS Officer: JOHN MacKINNON
Notification Date: 09/23/2001
Notification Time: 18:45 [ET]
Event Date: 09/23/2001
Event Time: 18:34 [EDT]
Last Update Date: 09/23/2001
Notification Time: 18:45 [ET]
Event Date: 09/23/2001
Event Time: 18:34 [EDT]
Last Update Date: 09/23/2001
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
BRIAN BONSER (R2)
JOHN ZWOLINSKI (NRR)
BRIAN BONSER (R2)
JOHN ZWOLINSKI (NRR)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
CONDITION FOR AN UNUSUAL EVENT REPORTED BUT NOT DECLARED.
At 1755ET the sensing line to the "B" Centrifugal Charging Pump (CCP) local discharge pressure gage broke. The operator noticed that the Volume Control Tank level was decreasing, Reactor Coolant System Pressurizer level did not change, but the VCT low level alarm was never reached. The leak was from the sensing line for "B" CCP local discharge pressure gage which is located in the Auxiliary Building. The leak rate was determined to be approximately 25 gpm by using the plant computer monitor to determine the rate of change of the Volume Control Tank level. All the water issuing from the sensing line drained into the Auxiliary Building drain system which drained into the radwaste system. No release offsite.
The licensee is not in any Limiting Condition of Operation at this time. "B" CCP is fully operable because it's discharge pressure can be read from several locations, "A" CCP is fully operable. All other emergency core cooling systems, emergency diesel generators are fully operable if needed. State and Local officials were notified of this event.
The time between 1801 hours and 1834 hours were used to determine the size of the leak from the Volume Control Tank.
The NRC Resident Inspector will be notified of this event by the licensee.
At 1755ET the sensing line to the "B" Centrifugal Charging Pump (CCP) local discharge pressure gage broke. The operator noticed that the Volume Control Tank level was decreasing, Reactor Coolant System Pressurizer level did not change, but the VCT low level alarm was never reached. The leak was from the sensing line for "B" CCP local discharge pressure gage which is located in the Auxiliary Building. The leak rate was determined to be approximately 25 gpm by using the plant computer monitor to determine the rate of change of the Volume Control Tank level. All the water issuing from the sensing line drained into the Auxiliary Building drain system which drained into the radwaste system. No release offsite.
The licensee is not in any Limiting Condition of Operation at this time. "B" CCP is fully operable because it's discharge pressure can be read from several locations, "A" CCP is fully operable. All other emergency core cooling systems, emergency diesel generators are fully operable if needed. State and Local officials were notified of this event.
The time between 1801 hours and 1834 hours were used to determine the size of the leak from the Volume Control Tank.
The NRC Resident Inspector will be notified of this event by the licensee.