SGHWR fuel channel

For commercial applications of the enriched reactor, these increases in available performance lead to the possibility of a considerable upratlng of power output from the Wlnfrith SGHWR fuel and channel designs. The upper limit for the design at which the fuel temperature limitation is reached is in the range 5-5 to... 

The coupled code JOSHUA is of particular Importance in the natural uranium SGHWR project. It has been used to show that the fuel management scheme may be designed to offset some of the consequences of the positive void coefficient. Since steam voids Increase reactivity there is a tendency for the power to peak towards the channel exit. This may be corrected by loading fresh fuel at the lower end of the channel and moving the parts of ein axially sub-divided element upwards during irradiation. 

SYNOPSIS The considerations governing the choice of fuel management schemes in SGHWRs are reviewed. Since the pressure tube construction permits ready access to Individual channels, a wide range of schemes are possible and these can be adjusted to suit the requirements of particular installations. As examples the fuel management schemes evolved for the 100 MWe Winfrith reactor, a 350 MWe low enrichment design, and a natural uranium version are described. 

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