FeCrAl-UN燃料棒性能模拟分析  

Simulation Analysis of FeCrAl-UN Fuel Rod Performance

作　　者：涂腾 高士鑫 周毅[2] 陈平[2] 张瑞谦[1] 杨青峰 廖楠 Tu Teng;Gao Shixin;Zhou Yi;Chen Ping;Zhang Ruiqian;Yang Qingfeng;Liao Nan(Nuclear Power Institute of China,Chengdu,610213,China;Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]中国核动力研究设计院,成都610213 [2]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610213

出　　处：《核动力工程》2021年第S02期165-170,共6页Nuclear Power Engineering

基　　金：国家重点研发计划(2019YFB1901000)。

摘　　要：FeCrAl包壳和UN芯块作为耐事故燃料(ATF)的重要选项,需要对其在压水堆环境中的性能进行分析。本文基于国内外最新的FeCrAl包壳和UN燃料物性数据和行为模型,对燃料性能分析程序FUPAC进行了二次开发,从而对不同线功率密度下FeCrAl/UN、FeCrAl/UO_(2)、Zr-4/UN和Zr-4/UO_(2)燃料棒堆内性能进行分析。通过对比,FeCrAl/UN燃料棒在芯块温度、裂变气体释放、燃料棒内压等方面具备良好性能,但由于FeCrAl包壳的蠕变率低,一旦包壳-芯块间隙闭合,包壳应力迅速增加,该现象需要在后续研究中加以关注。FeCrAl cladding and UN fuel pellet are important accident tolerant fuel(ATF)candidates,it’s necessary to analyze the performance of FeCrAl cladding and UN fuel pellet under PWR operation condition.Based on the latest FeCrAl cladding and UN fuel physical property data and behavior model at home and abroad,the fuel performance analysis program FUPAC is redeveloped to analyze the in-reactor performance of FeCrAl/UN,FeCrAl/UO_(2),Zr-4/UN and Zr-4/UO_(2) fuel rods under different linear power densities.Through comparison,the results showed that FeCrAl/UN fuel rod has good performance in aspects like pellet temperature,fission gas release,fuel rod internal pressure,etc.But due to low creep rate of FeCrAl cladding,once the cladding-pellet gap closes,the cladding stress increases rapidly.This phenomenon needs to be paid attention during the following research.

关 键 词：耐事故燃料(ATF) 氮化铀(UN)燃料 FeCrAl包壳 

分 类 号：TB535[理学—物理]