72 | | Neutrons were started again in the middle of the geometry, with 10MeV starting energy. In the first three time intervals the neutrons thermalize and from the fourth time step on fission neutrons start to appear, and for the last time step the fission neutrons dominate the spectrum again. For this process neutrons had to transverse geometry, select interaction, slow down by scattering reactions, captured by absorption and finally escape or induce fission. As Fig. 6 shows every important reaction for a reactor neutronics is sampled and the previously shown isotope-by-isotope validation process also matches MCNP results for a –though very simplified, but still a -.reactor application |
| 72 | Results for the subcritical model is shown in Fig. 4. |
| 73 | |
| 74 | Neutrons were started again in the middle of the geometry, with 10MeV starting energy. In the first three time intervals the neutrons thermalize and from the fourth time step on fission neutrons start to appear, and for the last time step the fission neutrons dominate the spectrum again. For this process neutrons had to transverse geometry, select interaction, slow down by scattering reactions, captured by absorption and finally escape or induce fission. As Fig. 6 shows every important reaction for a reactor neutronics is sampled and the previously shown isotope-by-isotope validation process also matches MCNP results for a –though very simplified, but still a - reactor application |