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Tepco: radiation from Fukushima plant declines further
Key Excerpts from Article on Website of Scientific American/Reuters
Posted: October 25th, 2011
http://www.scientificamerican.com/article.cfm?id=tepco-radia...
The operator of Japan's tsunami-hit Fukushima nuclear power plant [Tokyo Electric Power (Tepco)] said the amount of radiation being emitted from the complex has halved from a month ago, in the latest sign that efforts to bring the plant under control are progressing. In light of the progress being made in cooling its damaged reactors, which suffered nuclear fuel meltdowns in the first days of the crisis, Tepco formally brought forward its plan to bring the plant to a state of "cold shutdown" within this year. Technically, a cold shutdown is a state in which water used to cool nuclear fuel rods remains below 100 degrees Celsius, preventing the fuel from reheating. Declaring a cold shutdown will have repercussions well beyond the plant as it is one of the criteria the government said must be met before it begins allowing about 80,000 residents evacuated from within a 20 km (12 mile) radius of the plant to go home. Japan faces a massive cleanup task if these residents are to be returned home -- the environmental ministry says about 2,400 square km (930 square miles) of land surrounding Daiichi may need decontamination. Even if a cold shutdown is declared Tepco has acknowledged that it may not be able to remove the fuel from the reactors for another 10 years and that the cleanup at the plant could take several decades.
Note: For more on the Fukushima situation from the standpoint of the tens of thousands of evacuees, click here.
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