In early May, a study by Ireland's nuclear watchdog - the Irish Radiological Protection Institute -claimed that radioactive discharge from Sellafield continued to be the dominant source of contamination in the Irish Sea.

BBC: Sellafield comment 'offensive'

It is also the source of around 90% of the discharge of technetium-99, a long-lived radionuclide that lingers in shellfish.

ECONOMIST: Nuclear energy

In September, the EPA put forth a new Mandatory Emissions Reporting Rule that will require all facilities that directly emit or supply products or fuels that discharge more than 25, 000 metric tons of carbon dioxide a year to report those emissions by volume and source annually, effective January 2010.

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