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The control of a thermal neutron reactor Moore, R.V. Proceedings of the IEE - Part I: General Volume:	100, Issue: 123 DOI: 10.1049/pi-1.1953.0032 Publication Year: 1953 IET JOURNALS & MAGAZINES

The operation of the thermal neutron reactor has a reactivity it "fully charged with uranium, therefore, a reactor may be considered to have a certain basic reactivity, which may be called the "built-in reactivity," sufficient to offset the self-induced reactivity changes as they occur." This then introduces the mass of uranium into the core to achieve the a critical state. The effect that is produce more rapid in the reactivity is from the formation after fission and fuel elements absorb the cross-section of thermal neutrons. This process and the out come of "these materials are known as "poisons,"of which xenon is the most important. The isotope of interest is the decay product xenon 135, which has a capture cross-section for thermal neutrons greater than any other known nucleus.

11/7/2014 Thermal neutron operation reactor is reactive once it is "fully charged with uranium, therefore, a reactor may be considered to have a certain basic reactivity, which may be called the "built-in reactivity," sufficient to offset the self-induced reactivity changes as they occur." By having mass of uranium into the core to achieve the critical state. This effect produces more rapid reactivity from the formation after fission and fuel elements that cross-section full of thermal neutrons. The outcome process of “these materials are known as “poisons,” of which xenon most important. The isotope of interest is the decay produce by uranium 135. It has a capture cross-section from the thermal neutrons greater than any other known nucleus.