engineering model, scale 1:50, of Sizewell-B proposed PWR model, 1982, the first Pressurised Water Reactor in Britain, operational in 1995. cut-away section shows core of reactor.

Sizewell "B" proposed PWR model, 1982. Engineering model (scale 1:50). This is the first PWR in Britain, based on a design from the US. The fuel is uranium dioxide, supported in a large steel tank (the reactor pressure vessel) filled with water at a very high pressure. Water is pumped through the reactor to carry the heat away from the fuel. This heated water passes through a heat exchanger, where it heats a second supply of water. This water boils and the steam drives generators to produce electricity. This reactor became operational at Sizewell in 1995.