Vermont Yankee narrows source of tritium leak

first_imgVermont Yankee engineers and technicians working to identify the source of tritium in the plant’s groundwater continue to make progress, according to a statement Saturday from Vermont Yankee.  They have identified a location in the protected area of the plant with a tritium concentration of 2.45 million picocuries per liter in a newly installed groundwater monitoring well along the west wall of the plant’s Advanced Offgas Building. Engineers are making plans for additional excavation in the area to check some underground equipment that is used to transport water containing tritium from the offgas building to other plant buildings. The offgas system processes gases from the plant’s condenser. The wells between the plant and the river are showing varying concentrations that are not markedly different from yesterday.The engineers now have ten monitoring wells in service and four others being prepared for sampling. The well data is being used to further characterize the tritium concentration in the groundwater near equipment and buildings.While this investigation continues, Vermont Yankee’s Rob Williams said in a statement that it is there has been no elevated tritium level found in any drinking water well samples or at any location not on plant property, including the Connecticut River. The EPA has set a limit of 200,000 picocuries per liter for safe drinking water.For more details on the tritium investigation, the Vermont Department of Health has a thorough status report on the investigation at this web link: http://healthvermont.gov/enviro/rad/yankee/tritium.aspx(link is external)Also helpful is the Nuclear Regulatory Commission web page on tritium monitoring: http://www.nrc.gov/reactors/operating/ops-experience/grndwtr-contam-trit…(link is external)last_img

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