Fast fission factor from resonance escape probability¶
The fast fission factor is the ratio of the fast neutrons produced by fissions at all energies to the number of fast neutrons produced in thermal fission. Unfortunately proper fast fission factor formula is too complex for actual use. Approximate formula is not very useful since there is no actual data on \(P_\text{FAF}\), \(P_\text{TAF}\), and \(u_\text{f}\) values.
Links:
- fast_fission_factor¶
- Symbol:
epsilon- Latex:
\(\varepsilon\)
- Dimension:
dimensionless
- resonance_escape_probability¶
- Symbol:
p- Latex:
\(p\)
- Dimension:
dimensionless
- thermal_utilization_factor¶
- Symbol:
f- Latex:
\(f\)
- Dimension:
dimensionless
- fast_utilization¶
- Symbol:
u_f- Latex:
\(u_\text{f}\)
- Dimension:
dimensionless
- fast_neutrons_per_fission¶
Number of fast neutrons produced per fission. See
particle_count.
- Symbol:
nu_f- Latex:
\(\nu_\text{f}\)
- Dimension:
dimensionless
- thermal_neutrons_per_fission¶
Number of thermal neutrons produced per fission. See
particle_count.
- Symbol:
nu_t- Latex:
\(\nu_\text{t}\)
- Dimension:
dimensionless
- fast_absorption_fission_probability¶
- Symbol:
P_FAF- Latex:
\(P_\text{FAF}\)
- Dimension:
dimensionless
- thermal_absorption_fission_probability¶
- Symbol:
P_TAF- Latex:
\(P_\text{TAF}\)
- Dimension:
dimensionless
- thermal_non_leakage_probability¶
- Symbol:
P_TNL- Latex:
\(P_\text{TNL}\)
- Dimension:
dimensionless
- law¶
epsilon = 1 + (1 - p) / p * P_FAF * u_f * nu_f / (P_TNL * P_TAF * f * nu_t)- Latex:
- \[\varepsilon = 1 + \frac{1 - p}{p} \frac{P_\text{FAF} u_\text{f} \nu_\text{f}}{P_\text{TNL} P_\text{TAF} f \nu_\text{t}}\]