Rolls-Royce Prefabricated PWR

The Rolls-Royce prefabricated nuclear plant is a 300 MW power station mounted on two barges. The nuclear Island is contained on one barge and the conventional plant on the other. Essentially the nuclear Island consists of a compact 4-loop PWR using standard components and designed to meet UK safety criteria with appropriate equipment redundancy and diversity (Fig. 1). The reactor has been designed to take full advantage of PWR safety Improvements since the Three Mile Island incident in 1979. Basic data are given in Table 1. 

Reactor shutdown and engineered safety systems are initiated by two diverse reactor protecton systems with the safety systems arranged in four trains. 

The reactor vessel design utilises the concept of ring forgings to minimise the number of welds required in manufacture, as is proposed for the Sizewell B PWR. 

All major components including the steam generators are of a type that have proved to be highly reliable in service. Great care has been taken in the design to minimise the radiation dose to the operators during maintenance and in-service inspection. 

The reactor core consists of standard PWR rod bundle fuel as used in larger reactors. 

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