From DailyReporter (AP) — Radioactive tritium, a carcinogen discovered in potentially dangerous levels in groundwater at the Vermont Yankee nuclear plant, has now tainted at least 27 of the nation's 104 nuclear reactors — raising concerns about how it is escaping from the aging nuclear plants.
The leaks — many from deteriorating underground pipes — come as the nuclear industry is seeking and obtaining federal license renewals, casting itself as a clean-green alternative to power plants that burn fossil fuels.
Tritium, found in nature in tiny amounts and a product of nuclear fusion, has been linked to cancer if ingested, inhaled or absorbed through the skin in large amounts.
The Nuclear Regulatory Commission said Monday that new tests at a monitoring well on Vermont Yankee's site in Vernon registered 70,500 picocuries per liter, more than three times the federal safety standard of 20,000 picocuries per liter.
That is the highest reading yet at the Vermont Yankee plant, where the original discovery last month drew sharp criticism by Gov. Jim Douglas and others. Officials of the New Orleans-based Entergy Corp., which owns the plant in Vernon in Vermont's southeast corner, have admitted misleading state regulators and lawmakers by saying the plant did not have the kind of underground pipes that could leak tritium into groundwater.
"What has happened at Vermont Yankee is a breach of trust that cannot be tolerated," said Douglas, who until now has been a strong supporter of the state's lone nuclear plant. 
President Barack Obama, in his State of the Union address last week, called for "building a new generation of safe, clean nuclear power plants in this country." His 2011 budget request to Congress on Monday called for $54 billion in additional loan guarantees for nuclear power.
The 104 nuclear reactors operating in 31 states, including two in Wisconsin, provide only 20 percent of the nation's electricity. But they are responsible for 70 percent of the power from non-greenhouse gas producing sources, including wind, solar and hydroelectric dams.
Vermont Yankee is just the latest of dozens of U.S. nuclear plants, many built in the 1960s and '70s, to be found with leaking tritium.
"When you have public officials that the public depends on for their health and welfare making casual statements that a radioactive substance is not harmful to you, I think that's ludicrous," Klein said.
There's disagreement on the severity of the risk....
Paul Gunter of the Maryland-based anti-nuclear group Beyond Nuclear, said in many instances, it's impossible to know how much tritium is getting into the environment.
"These are uncontrolled, unmonitored releases from these plants," he said.
Steve Kerekes, spokesman for the Nuclear Energy Institute, an industry group, said the public shouldn't be unduly worried.
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