Integrating type neutron dose equivalent measuring instrument, measuring method of neutron dose equivalent and fast neutron flying direction of the estimation method

摘要

PROBLEM TO BE SOLVED: To provide a very lightweight integrating-type neutron dose equivalent measuring instrument, correctly measuring omnidirectional incoming neutrons.;SOLUTION: The integrating-type neutron dose equivalent measuring instrument includes a rotationally symmetric body (polyethylene block 30) formed of a hydrogen-containing organic polymer, three or more fast neutron detectors 32 which are rotationally symmetrically disposed at an identical depth deeper than a first predetermined depth from a surface of the body to detect recoil protons emitted from the hydrogen-containing organic polymer by a nucleus reaction with neutrons, and three or more thermal neutron detectors 34 which are rotationally symmetrically disposed at an identical depth deeper than a second predetermined depth from the surface of the body and have a neutron converting material 34B (e.g., α-ray converter) to emit α- or γ-ray by a nucleus reaction with neutrons.;COPYRIGHT: (C)2011,JPO&INPIT