posted on Feb, 11 2013 @ 01:30 PM
Due to a power outage caused by winter storm Nemo, the Plymouth nuclear power plant in Massachusetts went into hot shutdown at 22:00 Friday, February
8th. The diesel generators that supply back-up cooling power came online.
NRC--report # 48736
It was also reported by Cape Cod online
plant was at reduced power at the time of the shutdown because of a leaking reactor vessel safety relief valve, and it is likely (plant owner) Entergy
will address that prior to returning the plant to service,” Sheehan said.
This article also states that the plant has enough fuel to run for
more than a week.
It was later reported that 1 of 3 offsite power supplies was reconnected at 10:55 am on Sunday, February 10th.
Great news! Except that it only stayed on for 3 hours.
According to event report # 48739
"On Sunday, February
10, 2013 at 1405 [EST], with the reactor at 0% core thermal power, all control rods fully inserted, and in cold shutdown conditions, the plant
experienced a loss of off-site power. With Pilgrim Station aligned to off-site power via the start-up transformer (SUT), a fault on the 'B' phase of
the SUT was experienced due to suspected falling ice striking the phase's insulator. This resulted in the tripping of the feeder breaker, ACB-102, and
the loss of power to 4160 KV buses A1 through A4. Emergency Diesel Generators (EDGs) 'A' and 'B' auto-started as designed and are powering emergency
"The loss of off-site power resulted in de-energization of both Reactor Protection System (RPS) channels resulting in a reactor scram signal and
isolation of shutdown cooling. At 1418, shutdown cooling was returned to service. All other plant systems responded as designed. Station personnel are
in the process of establishing back-up power in accordance with plant procedures.
...back to operating on diesel generators.
Does it bother anyone else that there is no mention of this on the non-stop coverage of this blizzard and it's aftermath? Let alone the leaking
reactor vessel safety relief valve?
So the plant has been back on generator power for 24+ hours now. I sure hope this gets resolved very soon.
edit on 2/11/2013 by Olivine because: fix a mistake
edit on 2/11/2013 by Olivine because: ugh, spelling