Neutron interaction, between fissile units

VII. Neutron Interaction between Fissile Units in an Array. 94... 

VII. NEUTRON INTERACTION BETWEEN FISSILE UNITS IN AN ARRAY... 

Neutron interaction corves for the nine-cubic-array systems are presented in Fig. lb. For comparison, the interaction between taro square planar arrays of lK>2(NOa)2 cylinders is also shown. Although the interaction curves for the nine-array system were obtained for U(93.2) metal, they are applicable to 46 different fissile materials. Due to the generic nature of reflected arrays, the uranium metal units in the cubic arrays may be replaced by equivalent units of other fissile materials... 

A tabulation of minimum critical values, including mass, volume, dimension, concentration, and enrichment, starts the second lecture, which continues with the Influence of density and dilution Of fissile material. The balance of toe session is devoted to interaction between subcrltical units, the criticality of arrays, array moderar tion and reflection effects, and the effective isolation of units by neutron-absorbing materials. 

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