Tritium levels continue to rise in Pilgrim well

From the Patriot Ledger:

Entergy Corp. has found tritium levels that exceed federal drinking water standards in a monitoring well at the Pilgrim nuclear power plant for the first time since the wells were installed nearly three years ago.

The power plant owner learned on Monday that samples taken on July 7 showed one monitoring well near the Cape Cod Bay shoreline had more than 25,000 picocuries per liter of tritium, a radioactive isotope. The Environmental Protection Agency’s maximum threshold for safe drinking water is 20,000 picocuries per liter.

The elevated levels of tritium are in a monitoring well that was installed in April. Entergy has found elevated levels in that well since May, and the well’s tritium levels previously peaked at just more than 11,000 picocuries per liter last month.

A nearby monitoring well showed elevated levels of tritium, at more than 3,000 picocuries per liter, on July 7. The plant’s 10 other wells, including several that were installed in 2007, showed relatively low amounts of tritium, plant spokesman Dave Tarantino said.

Tarantino said the tritium leak doesn’t pose any threat to drinking water in Plymouth, largely because the groundwater at the plant flows into Cape Cod Bay. A test of Cape Cod Bay waters showed no elevated levels of tritium on July 7, he said.

Read more