【作者】 郭雨非； 刘畅； 马立勇； 邓才玉； 李军杰； 孙寿华； 宋霁阳； 张亮；

【Author】 GUO Yu-fei;LIU Chang;MA Li-yong;DENG Cai-yu;LI Jun-jie;SUN Shou-hua;SONG Ji-yang;ZHANG Liang;Nuclear Power Institute of China;Beijing Research Institute of Uranium Geology;

【机构】 中国核动力研究设计院； 核工业北京地质研究院；

【摘要】 ⁴⁰Ar-³⁹Ar定年样品入MJTR辐照时,为增加目标反应39K（n,p）39Ar的反应率并减少副反应的干扰,需要对辐照孔道进行选取,并对定年样品入堆对反应堆物理和热工安全的影响进行分析。本文首先研究了⁴⁰Ar-³⁹Ar定年样品入堆对MJTR反应性的影响;在保证安全的前提下计算了定年样品分别位于1#孔道、5#孔道及F07栅元时的39ArK产率及辐射时间,综合各因素选取了较优的辐照孔道;最后计算了不同装置部件的温度场,进行了热工安全评估。研究结果表明,⁴⁰Ar-³⁹Ar定年样品在MJTR内辐照宜选用1#孔道,辐照时间为3EFPD,并能满足MJTR物理热工安全要求。更多还原

【Abstract】 When the ⁴⁰Ar-³⁹Ar dating samples are irradiated in MJTR, in order to increase the reaction rate of the target reaction 39 K（n,p）39 Ar and reduce the interferences caused by side reactions simultaneously,it is necessary to select the irradiation channel, and analyze the influence of the dating samples on the physical and thermal safety of the reactor. In this paper, the effect of the ⁴⁰Ar-³⁹Ar dating samples on the reactivity of MJTR was studied firstly; besides, the productivity of 39 ArK and irradiation time while the dating samples were placed in Channel 1#, Channel 5# and Cell F07 respectively were calculated on the premise of safety, and then the optimal irradiation channel was selected based on various factors;lastly, the temperature fields of different components were calculated and the thermal safety was evaluated.The results show that Channel 1# should be utilized for the irradiation of the ⁴⁰Ar-³⁹Ar dating samples in MJTR and the irradiation should last for 3 EFPD; what’s more important, the requirements for the physical and thermal safety of MJTR can be met.更多还原