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This snapshot, taken on 07/08/2007, shows web content selected for preservation by The National Archives. External links, forms and search boxes may not work in archived websites.
The PWR design is based on US technology and is the most common reactor type used in the world. The reactor is contained in a steel pressure vessel. Pressurised water, which acts as both moderator and the coolant, is pumped around the reactor and through the boilers. The pressure vessel, boilers and connecting pipe-work form a sealed primary pressurised circuit, which is contained within a steel-lined pre-stressed concrete containment building, which also acts as a biological shield. The remainder of the generation process is similar to that for other power stations.
