title: SPECTRAL CORRECTION FACTORS FOR CONVENTIONAL NEUTRON DOSE METERS USED IN HIGH-ENERGY NEUTRON ENVIRONMENTS-IMPROVED AND EXTENDED RESULTS BASED ON A COMPLETE SURVEY OF ALL NEUTRON SPECTRA IN IAEA-TRS-403.
abstract: This paper presents improved and extended results of our previous study on corrections for conventional neutron dose meters used in environments with high-energy neutrons (En > 10 MeV). Conventional moderated-type neutron dose meters tend to underestimate the dose contribution of high-energy neutrons because of the opposite trends of dose conversion coefficients and detection efficiencies as the neutron energy increases. A practical correction scheme was proposed based on analysis of hundreds of neutron spectra in the IAEA-TRS-403 report. By comparing 252Cf-calibrated dose responses with reference values derived from fluence-to-dose conversion coefficients, this study provides recommendations for neutron field characterization and the corresponding dose correction factors. Further sensitivity studies confirm the appropriateness of the proposed scheme and indicate that (1) the spectral correction factors are nearly independent of the selection of three commonly used calibration sources: 252Cf, 241Am-Be and 239Pu-Be; (2) the derived correction factors for Bonner spheres of various sizes (6"-9") are similar in trend and (3) practical high-energy neutron indexes based on measurements can be established to facilitate the application of these correction factors in workplaces.
authors.affiliation: Institute for Risk and Uncertainty, University of Liverpool, Liverpool L69 7ZF, UK.|Institute of Nuclear Engineering and Science, National Tsing Hua University, 101 Sec. 2, Kung Fu Road, Hsinchu, Taiwan, R.O.C.
authors.forename: U
authors.initials: U
authors.lastname: Oparaji
authors.affiliation: Institute of Nuclear Engineering and Science, National Tsing Hua University, 101 Sec. 2, Kung Fu Road, Hsinchu, Taiwan, R.O.C.
authors.forename: Y H
authors.initials: YH
authors.lastname: Tsai
authors.affiliation: Institute of Nuclear Engineering and Science, National Tsing Hua University, 101 Sec. 2, Kung Fu Road, Hsinchu, Taiwan, R.O.C.
authors.forename: Y C
authors.initials: YC
authors.lastname: Liu
authors.affiliation: Institute of Nuclear Engineering and Science, National Tsing Hua University, 101 Sec. 2, Kung Fu Road, Hsinchu, Taiwan, R.O.C.|Institute of Nuclear Energy Research, Lungtan, Taoyuan, Taiwan, R.O.C.
authors.forename: K W
authors.initials: KW
authors.lastname: Lee
authors.affiliation: Institute for Risk and Uncertainty, University of Liverpool, Liverpool L69 7ZF, UK.
authors.forename: E
authors.initials: E
authors.lastname: Patelli
authors.affiliation: Institute of Nuclear Engineering and Science, National Tsing Hua University, 101 Sec. 2, Kung Fu Road, Hsinchu, Taiwan, R.O.C.|Department of Engineering and System Science, National Tsing Hua University, 101 Sec. 2, Kung Fu Road, Hsinchu, Taiwan, R.O.C.
authors.forename: R J
authors.initials: RJ
authors.lastname: Sheu
mesh_terms: D002138:Calibration; D009502:Neutrons; D011829:Radiation Dosage; D011874:Radiometry; D012016:Reference Values; D011795:Surveys and Questionnaires