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MONTE CARLO SIMULATION FOR CORRECTION OF IONIZATION CHAMBER WALL
Kurosawa, Tadahiro,Takata, Nobuhisa,Koyama, Yasuji Korean Association for Radiation Protection 2001 방사선방어학회지 Vol.26 No.3
In precise measurement of air kerma with cavity ionization chambers, the effect of wall attenuation and scatter are corrected by Kwall and that of nonuniformity by Knu. Using the EGS4 code, we calculated these two correction factors. Correction factors calculated for two different-sized cylindrical ionization chamber differ by up to 0.7% from those obtained by measurements.
MONTE CARLO SIMULATION FOR CORRECTION OF IONIZATION CHAMBER WALL
Tadahiro, Kurosawa,Nobuhisa, Takata,Yasuji, Koyama 대한방사선 방어학회 2001 방사선방어학회지 Vol.26 No.3
In precise measurement of air kerma with cavity ionization chambers, the effect of wall attenuation and scatter are corrected by Kwall and that of nonuniformity by Knu. Using the EGS4 code, we calculated these two correction factors. Correction factors calculated for two different-sized cylindrical ionization chamber differ by up to 0.7% from those obtained by measurements.
The Japan Health Physics Society Guideline on Dose Monitoring for the Lens of the Eye
Yokoyama Sumi,Tsujimura Norio,Hashimoto Makoto,Yoshitomi Hiroshi,Kato Masahiro,Kurosawa Tadahiro,Tatsuzaki Hideo,Sekiguchi Hiroshi,Koguchi Yasuhiro,Ono Koji,Akiyoshi Masahumi,Kunugita Naoki,Natsuhori 대한방사선방어학회 2022 방사선방어학회지 Vol.47 No.1
Background: In Japan, new regulations that revise the dose limit for the lens of the eye (hereafter the lens), operational quantities, and measurement positions for the lens dose were enforced in April 2021. Based on the international safety standards, national guidelines, the results of the Radiation Safety Research Promotion Fund of the Nuclear Regulation Authority, and other studies, the Working Group of Radiation Protection Standardization Committee, the Japan Health Physics Society (JHPS) developed a guideline for radiation dose monitoring for the lens.Materials and Methods: The Working Group of the JHPS discussed the criteria of non-uniform exposure and the management criteria set not to exceed the dose limit for the lens.Results and Discussion: In July 2020, the JHPS guideline was published. The guideline consists of three parts: main text, explanations, and 26 examples. In the questions, the corresponding answers were prepared, and specific examples were provided to enable similar cases to be addressed.Conclusion: With the development of the guideline on radiation dose monitoring of the lens, radiation managers and workers will be able to smoothly comply with revised regulations and optimize radiation protection.