Y. Yoshimoto et al., CRITICAL POWER EXPERIMENTS OF TIGHT FUEL-ROD LATTICE FOR LIGHT-WATER REACTORS, Journal of Nuclear Science and Technology, 30(11), 1993, pp. 1120-1130
This paper deals with the results of critical power experiments perfor
med simulating commercial BWR conditions at Hitachi Core and Fuel Test
Loop with seven fuel-rod heater bundles in a tight triangular lattice
array, which is assumed to be used in high conversion BWRs. The main
conclusions of experiments are; (1) The critical power in high convers
ion BWR fuel bundles in a tight triangular lattice array showed almost
the same dependence on operating conditions, namely mass flux, pressu
re, inlet subcooling etc., and the critical power can be accurately co
rrelated by critical quality and boiling length relation as in current
BWR fuel bundles in a loose square lattice array, (2) A correlation t
o predict the critical power in high conversion BWR fuel bundles was o
btained from the experimental results, and the predicted results by th
e correlation were summarized as, [GRA