VT Yankee: Closing in on Source of Tritium Leak?
Vermont Yankee continues to focus on a key underground pipe that carries steam away from the nuclear power plant's turbines to its main reactor stacks as a possible source of a tritium leak.
However, Vermont's top radiological health officer, Bill Irwin, told Seven Days that it is too soon to determine if this was the underground pipe leaking tritium into nearby groundwater.
The main focus of investigation and excavation is a pipe about 12 feet below the surface, said Irwin, called the advance off-gas system.
"It's very early on, but as a tritium source the drain line related to this off-gas system has been identified early on as a possible source, and excavation started a couple of days ago," Irwin told Seven Days via phone from the Vernon-based power plant.
Yesterday, around 4 p.m., workers encountered steam coming from the area of the pipe and halted work to further determine what steps should be taken, said Irwin. Samples from the ground did not prove to have tritium at high enough concentrations, but further digging will occur.
"Plant officials had hoped it would be indicative of a leak, but a sample taken last night and reported today proved they need to go deeper before they can confirm whether this is the source," said Irwin. He cautioned that finding the true source of the leak could be weeks, even months, away.
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