Study of coefficients of neutrons fluence conversion. Dose equivalent for a 252Cf source

This document has to purpose the bibliographic study of conversion coefficients between the fluence of a neutron source (californium 252) and the dose equivalents in different configurations. The first chapter is devoted to generalities about the neutron dosimetry, then, the different methods used to evaluate the fluence rates and the dose equivalent rates are shown. The second chapter studies the dose coefficients. It presents the conversion coefficients between the neutron fluence and the dose equivalent for a 252 californium source in several configurations. The dose equivalent are studied in the case of 252 cf source moderated by heavy water spheres in different sizes. (N.C.)