Radiation shielding design of the CFETR polarimeter interferometer and CO_(2) dispersion interferometer  

作　　者：Bo HONG Changlin LAN Xiaodong PAN Chao XU Haiqing LIU 洪博;兰长林;潘小东;徐超;刘海庆(School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,People's Republic of China;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,People's Republic of China)

机构地区：[1]School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,People's Republic of China [2]Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,People's Republic of China

出　　处：《Plasma Science and Technology》2022年第6期65-71,共7页等离子体科学和技术（英文版）

基　　金：the National MCF Energy R&D Program of China(Nos.2019YFE03040003 and 2017YFE0301205);Key Program of Research and Development of Hefei Science Center,CAS(No.2019HSC-KPRD001);supported in part by the Collaborative Research Program of the Research Institute for Applied Mechanics,Kyushu University。

摘　　要：A three-wave based laser polarimeter/interferometer and a CO_(2)laser dispersion interferometer are used to determine the electron and current density profiles on a Chinese fusion engineering test reactor(CFETR).Radiation shielding is designed for the combination of polarimeter/interferometer and CO_(2)dispersion interferometer.Furthermore,neutronics models of the two systems are developed based on the engineering-integrated design of CFETR polarimeter/interferometer and CO_(2)dispersion interferometer and the major material components of CFETR.The polarimeter/interferometer and CO_(2)dispersion interferometer's neutron and photon transport simulations were performed using the Monte Carlo neutral transport code to determine the energy deposition and neutron energy spectrum of the optical mirrors.The energy depositions of the first mirrors on the polarimeter/interferometer are reduced by three orders with the whole shielding.Since the mirrors of CO_(2)dispersion interferometer are very close to the diagnostic first wall,shielding space is limited and the CO_(2)dispersion interferometer energy deposition is higher than that of the polarimeter/interferometer.The dose rate after shutdown106s in the back-drawer structure has been estimated to be 83μSv h^(-1)when the radiation shield is filled in the diagnostic shielding modules,which is below the design threshold of 100μSv h^(-1).Radiation shielding design plays a key role in successfully applying polarimeter/interferometer and CO_(2)dispersive interferometer in CFETR.

关 键 词：CFETR polarimeter interferometer CO_(2)dispersion interferometer shielding design 

分 类 号：TL62[核科学技术—核技术及应用]