Nondestructive high-sensitivity measurement method for activation estimation in accelerator room concrete |
| |
Authors: | Hiroshi Matsumura Go Yoshida Akihiro Toyoda Kazuyoshi Masumoto Hajime Nakamura Taichi Miura Koichi Nishikawa Kotaro Bessho Kimikazu Sasa Tetsuaki Moriguchi Fumiyoshi Nobuhara Yoko Nagashima |
| |
Affiliation: | 1. High Energy Accelerator Research Organization KEK,Oho 1-1,Tsukuba Ibaraki 305-0801,Japan; 2. University of Tsukuba,1-1-1 Tennodai,Tsukuba,Ibaraki 305-8577,Japan; 3. Tokyo Nuclear Services Co.,Ltd.,1-3-5. Taito,Taito-ku,Tokyo 110-0016,Japan |
| |
Abstract: | This study established a method for easily and quickly estimating the specific activity produced in the concrete walls and floors of accelerator rooms during long-term operation of accelerator,for advanced zoning of activated/non-activated areas in planning the decommissioning of an accelerator.We propose a new,highly sensitive method for nondestructively estimating the specific activity in concrete that can be applied to activation zoning.In this method,instead of direct determination of the specific activities of important long-half-life radionuclides for decommissioning,such as 152Eu and 60Co,we determine the specific activities of short-half-life radionuclides,24Na and 56Mn,in situ to obtain neutron flux.The obtained neutron flux and accelerator operation history yield the specific activities of 152Eu and 60Co for the advance zoning of activated/non-activated concrete.This method is a powerful long-term prediction tool for concrete activation. |
| |
Keywords: | accelerator activation concrete specific activity decommissioning |
|
| 点击此处可从《辐射防护》浏览原始摘要信息 |
|
点击此处可从《辐射防护》下载全文 |
|