He placed the fish with the oil, herbs (fresh thyme, sea salt and white pepper) and garlic in a ziplock bag and poached it in boiling water.

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There are a number of different reactors in use, most commonly water-cooled pressurised or boiling water reactors - though other reactor types are kept cool with the help of liquid metal, gas or molten salt.

BBC: Will Japanese crisis curb the rise of nuclear power?