Tritium is an isotope of hydrogen that has been linked to cancer when ingested in large amounts, but the NRC officials said the tritium leak first reported at Vermont Yankee on Jan. 7 posed no immediate threat to public health and safety.
Plant officials admitted last month that they had misled state officials, sometimes under oath, by saying the plant did not have the sort of underground pipes that could carry tritium.
Federal officials said Entergy, the plant’s parent company, confirmed the 2005 leak to the NRC Monday.
Vermont Yankee spokesman Larry Smith said Monday evening that he would have to talk to a company lawyer before commenting.
The Vermont Senate is to vote this week on whether to allow Vermont Yankee to continue operating for 20 years beyond its current license expiration date in 2012. The Vermont Legislature is the only one in the country allowed by state law to weigh in on a nuclear plant’s relicensing.
Confirmation that Vermont Yankee found a leak of tritium from an underground pipe in 2005 could provide new evidence that plant officials knew of the existence of the pipes before the incorrect statements about them in 2008 and 2009.
State Attorney General William Sorrell has launched a criminal investigation into whether plant officials lied under oath.
Last week, two environmental groups called on the US Justice Department to launch a similar probe.
Also Monday, a group of Vermont business and labor leaders called for a timeout before the Senate vote, which Vermont Yankee is widely expected to lose.
They argued that lawmakers need to collect more information before making a decision.
John O’Kane - a lobbyist for IBM, whose plants outside of Burlington are Vermont’s largest electric customer and largest private employer - insisted the group was pushing only for more time for deliberation.
To “state that we’re all here because we want’’ the plant to be relicensed is “not what we’ve asked for,’’ he said. “That’s not what we’re saying.’’
That did not appear to square with the Web site website of the Vermont Energy Partnership, which hosted Monday’s news conference and of which IBM is a member.
The lead item on the site is headlined, “The case for Vermont Yankee.’’ It concludes: that “There are likely to be severe financial consequences statewide to closing Vermont Yankee. Vermont’s economy and recovery are at risk.’’
