Health & Safety

Potassium Iodide (KI)

What is KI – What is it for?

In a nuclear reactor accident, radioactive iodine is released; it can cause thyroid cancer/disease, and mental retardation in children of exposed pregnant women. Children and infants, including the unborn, are most vulnerable. KI protects by blocking the thyroid with a harmless form of iodine.…

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5 violations found in quarterly review of Pilgrim nuclear plant

PLYMOUTH — During April’s refueling at Pilgrim Nuclear Power Station, 10 contracted workers entered the main condenser of the reactor to deal with a faulty gasket without wearing the proper protective gear. The plant’s radiation technician said he believed the workers were simply measuring the gasket. But after measuring it, they proceeded to cut it out in order to replace it.…

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Pilgrim Chronology 1967-2015

This chronology attempts to capture the major milestones related to Pilgrim Nuclear Power Station beginning with the Town of Plymouth’s granting of a special permit to Boston Edison to construct a nuclear power facility in 1967, and ending with Entergy’s announcement on October 13, 2015 that Pilgrim will close no later than June 2019.…

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USC brief on Pilgrim’s August shutdown

From Dave Lochbaum, Union of Concerned Scientists:

“Attached is a brief about Saturday’s unexpected shut down at Pilgrim. The owner’s initial report did not identify the reason the Main Steam Isolation Valve closed or which of two signals automatically tripped the reactor. Because the initial report has to be made to the NRC within a short time (I think it’s an hour), it probably omitted naming the likely suspects until workers have reviewed the data and verified their suspicions.”

UCS – MSIV Scram at Pilgrim (PDF)

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OF NUCLEAR INTEREST: Pilgrim Juno scram linked to history of prior failures

OF NUCLEAR INTEREST: Pilgrim Juno scram linked to history of prior failures

On Tuesday, Jan. 27, when winter storm Juno hit Entergy’s Pilgrim Nuclear Power Station (PNPS) in Plymouth, it caused an emergency “scram,” also called a “reactor trip” and more simply known as an unplanned shutdown. Unplanned shutdowns present a risk to public safety, especially when efforts to control reactor temperature and pressure during an unplanned shutdown are complicated by multiple critical equipment failures, as was the case at PNPS during Juno.…

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