While
our attention was diverted by the events in Boston this happened.
This happened 2 days ago
The fact is that all nuclear reactors are wearing out at a breakneck speed and humankind has done nothing to prepare for that
ALERT! La Salle Nuclear Plant Nearly Took Out Chicago!
ALERT! La Salle Nuclear Plant Nearly Took Out Chicago!
From
ENE
News,
18
Aoril, 2013
LaSalle
News Tribune:
Exelon Generation’s La Salle County Generating Station declared
an Unusual Event at 3:11 p.m. today, after both units
automatically shut down when power from the switchyard into the
site was interrupted during a severe thunderstorm. [...] Technical
experts are working to restore power to the switchyard. [...]
LaSalle Generating Station is located about 75 miles southwest of
Chicago [...]
The U.S. Nuclear Regulatory Commission Region III staff is
monitoring the La Salle nuclear power plant after a lightning
strike knocked out offsite power to both Units 1 and 2. The NRC
has mobilized its Incident Response Center in Region III, located
in Lisle, Ill., and is monitoring the events along with the
resident inspector onsite. [...] An Unusual Event is the lowest
levels of the NRC’s four level emergency classification system.
[...]
“In addition to information [previously provided], LaSalle Unit
2 received a high drywell pressure signal [1.77 psig] due to loss
of containment cooling from the loss of power. [...] There is no
evidence of reactor coolant leakage. There was no additional ECCS
systems discharging into the RCS [Reactor Coolant System]. [...]
two Unit 2 primary containment vent and purge valves were opened
to vent the Unit 2 containment. Once Unit Two containment pressure
reached 1.77 [psig], these two vent valves isolated as expected.
“Due to the loss of offsite power, the Station Vent Stack Wide
Range Gas Monitor (WRGM) and the Standby Gas Treatment Wide Range
Gas Monitor (VGWRGM) also lost power. Manual sampling has been
implemented and power is restored to the VGWRGM, however the
VGWRGM has not been declared operable yet. Normal radiation levels
have been reported from the manual sampling. [...]
“After the Unit 2 primary containment vent and purge system
isolated on the Unit 2 containment High Pressure signal, Venting
of the Unit 1 primary containment was commenced. At 2005 CDT, Unit
1 primary containment pressure reached the Group 2 primary
containment isolation system setpoint (1.77 PSIG) causing the
primary containment vent and purge valves being used to vent the
Unit 1 containment to isolate. Unit 1 primary containment venting
was being performed through the Standby Gas Treatment system which
is a filtered system. [...]
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