Reactivity Coefficients – Reactivity Feedbacks
population in a nuclear reactor to an external reactivity input. There was applied an assumption that the level of the neutron population does not affect the properties of the system, especially that the neutron power (power generated by chain reaction) is sufficiently low that the reactor core does not change its temperature (i.e. reactivity feedbacks may be neglected). For this reason such treatments are frequently referred to as the zero-power kinetics.
However, in an operating power reactor the neutron population is always large enough to generated heat. In fact, it is the main purpose of power reactors to generate large amount of heat. This causes the temperature of the system changes and material densities change as well (due to the thermal expansion).
See also: General Atomics – TRIGA
- Reactivity Coefficients – Reactivity Feedbacks
- How negative feedback acts against power excursion
- Reactor Criticality