Measurement and Calculation of Neutron Leakage through Labyrinth from 35 MeV Proton Accelerator Room

概要

論文の詳細を見る
Energy spectra and dose equivalents of neutrons which were produced by 35 MeV protons in an accelerator room and leaked through a labyrinth with three legs from it, were measured by a multi-moderator spectrometer and a dose-equivalent counter.<BR>Two simple formulas developed by Tesch and Nakamura & Uwamino, were compared with the measured values in order to examine their adaptability.<BR>Two new simple formulas were also developed to calculate the dose equivalent both in the source room and in the labyrinth.The first simple formula, ROLA-D, is based on Nakamura & Uwaminos formula and Goebels universal attenuation curve.The second simple formula, ROLA-E, which is based on Shins two analytical formulas, can calculate the neutron energy spectrum in addition to the dose equivalent.<BR>Four simple formulas were intercompared with the measurements and the calculations by the three-dimensional Monte Carlo code, MORSE-CG.<BR>Consequently, it was clarified that ROLA-D gave the best result for the dose equivalent of neutrons leaked through a labyrinth.