THE AGGREGATES AS NUCLEAR
The gangue was the moderator
Constituted mainly by O, Al, Si, etc. with low absorption cross sections for thermal neutrons and with good slowing down properties
Water is a good moderator, cooland and control agent
By using one group of thermal neutrons we have obtained the critical mass, Mc, of the aggregates (assuming that its composition is unifrorm) as a function of C, W and age (t). Our results show that Mc values decrease when t and C increase. So, the formation of aggregates, with masses equal or greater than Mc, could be a relatively frequent phenomenom !
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