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Federal regulators are leaning toward approving a nuclear reactor designed by Westinghouse Electric Co. that could power the first nuclear plants built from scratch in a generation.
A majority of the members of the U.S. Nuclear Regulatory Commission have released statements saying they voted to approve the AP1000 reactor, most recently Commissioner William Magwood IV late Tuesday. Magwood is the third of the five commissioners to vote in favor of the reactor, although it is possible that others on the board have voted but not publicly released their ballots.
The commissioners can change their preliminary votes, which are not official until the NRC holds a final tally during a public meeting.
Still, the early support is a step forward for utility companies in Georgia, Florida and the Carolinas that have billions of dollars riding on plans to build that reactor in the Southeast. Until the NRC approves the reactor design, those utilities cannot get a license to build their plants.
Westinghouse, based in Cranberry Township, Pa., says its new reactor is safer because it relies on what it calls passive forces such as gravity and convection — not diesel generators and electric pumps and motors — to run emergency cooling systems. That contrasts with the Fukushima Dai-ichi nuclear plant in Japan, which suffered three meltdowns, explosions and released radiation into the environment after a March 11 tsunami wrecked its backup power systems.
"The combination of passive safety, severe accident, and defense-in-depth features gives me confidence that the AP1000 design is sufficiently safe," NRC Chairman Gregory Jaczko said in a written statement accompanying his ballot.
Federal officials approved an earlier version of the AP1000 reactor in 2006, but it was never built in the United States. Four AP1000 reactors are now under construction in China.
The biggest difference between the AP1000 and existing reactors is its safety systems, including a massive water tank on top of its cylindrical concrete-and-steel shielding building. In case of an accident, water would flow down and cool the steel container that holds critical parts of the reactor — including its hot, radioactive nuclear fuel. An NRC taskforce examining the Fukushima crisis earlier said licensing for the AP1000 should go forward because it would be better equipped to deal with a prolonged loss of power — the problem that doomed the Japanese plant.
Arnie Gundersen, a nuclear engineer hired by groups opposed to the reactor, warned regulators that the steel container that surrounds sensitive reactor parts — such as a vessel holding the nuclear fuel — could corrode or be damaged in a severe accident. He said a system that uses naturally circulating air to cool the plant during an accident would send radioactivity seeping from the containment into the outside environment.
"In solving one set of problems, they've created another problem," he said. "It's the law of unanticipated consequences."
Originally posted by Maslo
Where do you think energy comes from, pixie dust? Nuclear, especially new reactor designs focused on safety, is much safer than fossil fuels per energy produced. That alone as an argument is enough to show that opposition to nuclear has no merit.
This is a new modern Generation III+ reactor. Comparison to almost 50 years old Fukushima reactor designs is inapplicable.
edit on 15/12/11 by Maslo because: (no reason given)
Originally posted by isyeye
reply to post by Maslo
Do you really think that our governments want us to have "free energy"?
Originally posted by isyeye
reply to post by Maslo
Do you really think that our governments want us to have "free energy"?
Nikola Teslaedit on 15-12-2011 by isyeye because: (no reason given)
If you care about the environment, you should embrace this new safer design.
Originally posted by isyeye
reply to post by Maslo
Do you really think that our governments want us to have "free energy"?
Nikola Teslaedit on 15-12-2011 by isyeye because: (no reason given)
The NRC hasn’t issued a construction license for a U.S. nuclear plant since a partial meltdown at the Three Mile Island facility near Harrisburg, Pennsylvania, in 1979.
Jaczko and Magwood voted to move ahead with the AP1000 while reserving the option of requiring added safeguards later.
Jaczko also h/as said the commission’s majority “loosened the agency’s safety standards” over his opposition.
The AP1000’s design is inadequate to withstand potentially high pressure inside the reactor, according to a November report commissioned by the environmental groups Friends of the Earth, based in San Francisco, and the North Carolina Waste Awareness & Reduction Network. The environmental groups have vowed to block the AP1000’s construction in the courts unless the NRC reconsiders the design.