Enformable: “TEPCO investigates radiation levels of exhaust stack at Fukushima Daiichi” plus 1 more |
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Posted: 06 Dec 2013 10:04 AM
PST
Workers at the Fukushima
Daiichi nuclear power plant used a camera attached to a long pole with a
dosimeter to explore highly radioactive areas near the combined exhaust stack
for Unit 1 and Unit 2 reactors. Part of the decommissioning process
requires the reinforcement and dismantling of portions of the exhaust stack,
but the contaminated areas make it impossible for workers to access some of
the required areas.
The investigation found
radiation doses of 95 millisieverts per hour 5 feet from the SGTS piping at
the base of the exhaust stack.
Cracks were previously
identified in the exhaust stack some 200 feet above the ground during seismic
safety evaluations. Radiation levels inside the pipe were measured at
more than 10 Sieverts per hour.
TEPCO assumes that the high
dose areas identified by investigations, is likely due to two or more highly
radioactive sources in the piping. It is estimated that the sources may
around 25 Sieverts per hour near-surface, with a dose rate of some 15
Sieverts per hour.
The investigation did not
determine whether Unit 1 or Unit 2 was the source of the contamination.
Source: TEPCO
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investigates radiation levels of exhaust stack at Fukushima Daiichi
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Posted: 06 Dec 2013 04:18 AM
PST
On Wednesday afternoon around
13:35 EST, an employee found a whiskey bottle in the protected area of the
Watts Bar nuclear power plant. The seal on the bottle appeared
undisturbed at time of discovery.
Security launched an
investigation, took possession of the bottle, and removed it from the
protected area.
Source: NRC Event Notifications
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in protected area of Watts Bar nuclear power plant appeared
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