The British Naval programme has seen five new core designs pass from concept into manufacture at Rolls-Royce. Three core designs were developed for the basic PWR1 plant with two further designs developed for the larger PWR2 plant.
However, new core designs do not suddenly appear. Between establishing the initial requirement and prototype operation there are many years of co-operative multi-disciplinary effort.
The success achieved is well illustrated by the changes in the ratio of core power to hydraulic power and the dramatic fall in reactor noise.
Rolls-Royce, working with the Ministry of Defence is developing an integrated and coherent programme to support technology insertion into the current submarine classes and Astute.
Part of this programme will consider possible options for a future generation of safer, more available and affordable submarine reactor plant.