【作者】 钱晶； 张玥； 陈国长； 吴海成； 葛智刚； 刘廷进；

【Author】 QIAN Jing;ZHANG Yue;CHEN Guo-chang;WU Hai-cheng;GE Zhi-gang;LIU Ting-jin;Key Laboratory of Science and Technology on Nuclear Data,China Institute of Atomic Energy;

【机构】 中国原子能科学研究院核数据重点实验室评价部；

【摘要】 裂变产物核通常是指裂变后生成的Z=31～68之间的核素,其中包含了一些对于反应堆设计、运行非常重要的中重核区的核素,如:裂变毒物核素、控制棒材料及核废物处理非常重要的长寿命核素。在2009年释放的CENDL-3.1库中裂变产物核共有138个核素。由于中子与裂变产物核素相互作用在中子输运计算和剩余核辐射安全以及材料损伤都非常重要,本工作根据中子、光子输运及燃耗计算需要,对重要的69个裂变产物核素全套中子评价数据进行了更新评价,并根据不同情况,分别进行了比对推荐、重新计算和重新评价,将CENDL库的裂产物核素增至164个,其中重要改进了43个核素。本文以20 MeV以下n+^105,106,107Pd为例介绍了裂变产物核的全套中子数据比对推荐;以n+¹⁰⁸Pd为例,通过对最新实验数据分析及各评价库的比对,并更新¹⁰⁸Pd（n,γ）反应道能级密度参数,结合了UNF理论计算,完成了n+¹⁰⁸Pd全套中子评价数据的更新评价。更新的裂变产物核数据已入CENDL库,并提供用户使用。更多还原

【Abstract】 The CENDL-3.1 library contained 138 nuclides that fall into the range of fission products,defined as elements with Z = 31 ～ 68.They include some structural materials,fission product poison,control rods materials and long-lived nuclides that are critical in radioactive waste.They are important in reactor design and operation.It was motivated by the need to improve the existing evaluated data of some important nuclides for a number of applications,including criticality safety,burn-up credit for spent fuel transportation,disposal criticality analysis and design of advanced fuels.Totally,the data of 69 fission product nuclides with high priority were evaluated,and the number of nuclides was increased to 164.According to the different situations,the data updates were completed by comparing recommendation,new calculation and new evaluation respectively.The data updates for n+^105,106,107 Pd were given as an example of comparing and recommendation in this paper,which was performed based on the analysis and comparison between different evaluated data libraries in the world.And as an example of new evaluation,the evaluation for ¹⁰⁸Pd were described in this paper,which were based on the experimental data analysis and theoretical calculation by using UNF code with a set of new obtained parameters.The updated data were included in CENDL and offered to users.更多还原