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I found a land-based nuclear reactor—Sellafield— along the Irish Sea with similar "easy" disposals.
http://www.corecumbria.co.uk/tour/irishsea.htm
Sellafield has a rather notorious operational history. Its original name was Winscale. There was a huge fire in the reactor pile and it released a massive amounts of radiation in the atmosphere.The release of radiation by the Windscale fire was greatly exceeded by the Chernobyl disaster in 1986, but the fire has been described as the worst reactor accident until Three Mile Island in 1979. The British Government changed its name to Sellafield.
Sick bastards.