|Power Reactor||Event Number: 45604|
Region: 1 State: NJ
Unit: [ ]  [ ]
RX Type:  W-4-LP, W-4-LP
NRC Notified By: ENRICAS VILLAR
HQ OPS Officer: VINCE KLCO
|Notification Date: 01/03/2010
Notification Time: 11:52 [ET]
Event Date: 01/03/2010
Event Time: 08:04 [EST]
Last Update Date: 01/03/2010
|Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
LAWRENCE DOERFLEIN (R1DO)
|Unit||SCRAM Code||RX CRIT||Initial PWR||Initial RX Mode||Current PWR||Current RX Mode|
|2||M/R||Y||82||Power Operation||0||Hot Standby|
|MANUAL REACTOR TRIP DUE TO LOSS OF
CIRCULATORS AFTER UPTAKE OF RIVER ICE
"A manual trip of Salem Unit 2 was initiated due to a loss of 4 circulators due to an excessive uptake of river ice. Strong northwest winds, freezing temperatures and abnormally low tide levels contributed to the ice formation on the river. The operating crew entered EOP-TRIP-A, appropriately transitioned to EOP-TRIP-2 and stabilized the plant at no load conditions (MODE 3 Hot Stand-by).
"All rods fully inserted on the trip and all systems responded as designed with decay heat being removed via the Steam Dump system, with condenser vacuum maintained. All three AFW Pumps auto started due to low Steam Generator level due to closure of 21-23CN27, low pressure feed water heater inlet isolation valves. There were no other significant equipment challenges associated with the reactor trip.
"Salem Unit-2 is currently in mode 3. The Reactor Coolant System temperature is 547 [degrees] F with pressure at 2235 psig [NOT and NOP]. All ECCS and ESF Systems are available and no ECCS systems actuated during the event. No personnel injuries occurred as a result of the trip. [The Unit 2 reactor trip recovery is uncomplicated.]."
Unit 1 power was also reduced to 80%. Although the combination of strong northwest winds, freezing temperatures and an abnormally low tide contributed to the ice formation on the river, operators foresee no further complication due to the ice conditions.
The licensee has notified the NRC Resident Inspector and will notify the States of Delaware and New Jersey.