Factors Affecting Neutron Multiplication

Poison addition to the reactor is the final general factor affecting neutron multiplication. Poisons can be in the form of boron in control rods xenon and samarium fission products or any absorbing nucleus that is introduced into the reactor. Poisons increase the denominator in the thermal utilization factor making the overall value of f decrease. In the case of resonance absorbers, resonance escape probability also decreases. 

Describe the chain reaction, a neutron generation, the core multiplication factor, and primary operating factors that affect neutron multiplication and their effects. 

An increase in void concentration in the core affects neutron multiplication factor terms as follows (1) t] remains constant (2) e remains essentially constant though it may increase slightly (3) P decreases due to increased resonance absorption (4) f increases due to decreased moderator absorption ... 

Name four neutron processes that affect the value of the multiplication factor in the Hanford (or any) reactor. 

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