Entergy drills more tritium monitoring wells at Vermont Yankee

From the Times Argus:

Entergy Nuclear is drilling four additional monitoring wells outside the Vermont Yankee nuclear plant to better define the plume of underground radioactive contamination, the company said Thursday.

Drilling of the wells is being delayed for about two weeks because Entergy engineers need to review and sign off on the project, said Larry Smith, spokesman for Entergy Nuclear.

Levels of tritium continue to rise in the well closest to the Connecticut River and within the mapped plume. Smith said that well, GZ14-S, was shallow and about 60 feet from the river. Tritium was measured at 370,000 picocuries per liter last week, up from 353,000 picocuries per liter on Aug. 16. That level of radioactivity is similar to water inside the reactor.

A new extraction well is being drilled near GZ14-S, according to the Department of Health, and new equipment will allow Entergy to withdraw higher concentration groundwater.

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