Question

The mass of fissionable material needed for self sustaining chain reaction is called the: * Atomic mass • Sub-critical mass Fermi massTATE Critical mass​

Answer 1

Answer:

〜(꒪꒳꒪)〜〜(꒪꒳꒪)〜〜(꒪꒳꒪)〜〜(꒪꒳꒪)〜〜(꒪꒳꒪)〜

Answer 2

Answer:

At the point where the chain reaction can become self-sustaining, this is referred to as critical mass

Explanation:

The amount of a fissionable material's critical mass depends on several factors; the shape of the material, its composition and density, and the level of purity.

A sphere has the minimum possible surface area for a given mass, and hence minimises the leakage of neutrons.

By surrounding the fissionable material with a suitable neutron "reflector", the loss of neutrons can reduced and the critical mass can be reduced.