Most materials can be easily corroded or ineffective in carbonaceous atmospheres at high temperatures in the reactor core of the high temperature gas-cooled reactor(HTGR).To solve the problem,a material performance te...Most materials can be easily corroded or ineffective in carbonaceous atmospheres at high temperatures in the reactor core of the high temperature gas-cooled reactor(HTGR).To solve the problem,a material performance test apparatus was built to provide reliable materials and technical support for relevant experiments of the HTGR.The apparatus uses a center high-purity graphite heater and surrounding thermal insulating layers made of carbon fiber felt to form a strong carbon reducing atmosphere inside the apparatus.Specially designed tungsten rhenium thermocouples which can endure high temperatures in carbonaceous atmospheres are used to control the temperature field.A typical experimental process was analyzed in the paper,which lasted 76 hours including seven stages.Experimental results showed the test apparatus could completely simulate the carbon reduction atmosphere and high temperature environment the same as that confronted in the real reactor and the performance of screened materials had been successfully tested and verified.Test temperature in the apparatus could be elevated up to 1600oC,which covered the whole temperature range of the normal operation and accident condition of HTGR and could fully meet the test requirements of materials used in the reactor.展开更多
Safety system testing is one of the most rigorous and time-consuming requirements in the verification and validation process for reactor protection systems(RPSs).This paper presents the development of a test system fo...Safety system testing is one of the most rigorous and time-consuming requirements in the verification and validation process for reactor protection systems(RPSs).This paper presents the development of a test system for the fully digital and field-programmable gate array-based RPS of the solid fuel(SF) thorium-breeding molten salt pebble bed fluoride salt-cooled reactor(TMSR),denoted as the TMSR-SF1 project,developed by the Chinese Academy of Sciences.The test system is applied to the RPS to ensure that it fully meets its designed functions and system specifications.We first introduce the testing principles and methods.Then,the hardware component designs and the software program development of the test system are discussed.Finally,the test process and test results are discussed and summarized.展开更多
高通量工程试验堆(High Flux Engineering Test Reactor,HFETR)因其高中子通量密度,用于生产各种医用同位素。针对HFETR堆芯结构复杂、非均匀性强、辐照环境变化较大的特点,以“确定论燃料管理-蒙特卡罗粒子输运-产额”耦合计算的策略...高通量工程试验堆(High Flux Engineering Test Reactor,HFETR)因其高中子通量密度,用于生产各种医用同位素。针对HFETR堆芯结构复杂、非均匀性强、辐照环境变化较大的特点,以“确定论燃料管理-蒙特卡罗粒子输运-产额”耦合计算的策略建立了一套适用于不同类型同位素产额精确计算模型及方法。该方法首先通过研究堆专用燃料管理程序完成堆芯装载设计与燃耗计算,获得各时间步的燃料燃耗分布及临界棒位等参数,然后利用自编程序实现自动化全堆精细化建模,并利用蒙特卡罗方法完成输运计算。通过计算获得每一时间步下样品中不同核素与中子的反应率,通过产额求解程序与三维粒子输运蒙卡程序进行耦合,计算出下一个时间步样品内关键核素的含量变化情况,并对换料停堆和从出堆到测量期间的衰变损耗进行计算。该方法综合考虑了HFETR运行期间控制棒变化、燃料燃耗变化及计算燃耗步长的影响,利用HFETR已获得的同位素生产实验结果验证该套计算程序的准确性,对辐照88Sr生产89Sr产额的计算偏差为5.41%,对辐照生产32P产额的计算偏差为4.90%,对辐照生产177Lu产额的计算偏差为5.66%,与实验结果相比同位素产额计算偏差均在6%以内,证明该方法提高了同位素产额计算的精度,能够适用于研究堆生产同位素产额准确评估问题。展开更多
The design of high current balance reactors used in the ITER DC testing platform is presented,which is verified by simulations with finite element method software,and the reactors are fabricated and tested according t...The design of high current balance reactors used in the ITER DC testing platform is presented,which is verified by simulations with finite element method software,and the reactors are fabricated and tested according to the design output.These reactors are chosen as multilayer multi-turn structure and cooled by water.The multilayer multi-turn structure is usually selected by some high voltage reactors,but is seldom used in high current situations.The analysis and testing results indicate that the multilayer multi-turn structure is also feasible for high current reactors with many advantages,and is of considerable significance to similar applications.展开更多
基金Supported by the National S&T Major Project of China(No.ZX06901)the National Natural Science Foundation of China(No 11072131)
文摘Most materials can be easily corroded or ineffective in carbonaceous atmospheres at high temperatures in the reactor core of the high temperature gas-cooled reactor(HTGR).To solve the problem,a material performance test apparatus was built to provide reliable materials and technical support for relevant experiments of the HTGR.The apparatus uses a center high-purity graphite heater and surrounding thermal insulating layers made of carbon fiber felt to form a strong carbon reducing atmosphere inside the apparatus.Specially designed tungsten rhenium thermocouples which can endure high temperatures in carbonaceous atmospheres are used to control the temperature field.A typical experimental process was analyzed in the paper,which lasted 76 hours including seven stages.Experimental results showed the test apparatus could completely simulate the carbon reduction atmosphere and high temperature environment the same as that confronted in the real reactor and the performance of screened materials had been successfully tested and verified.Test temperature in the apparatus could be elevated up to 1600oC,which covered the whole temperature range of the normal operation and accident condition of HTGR and could fully meet the test requirements of materials used in the reactor.
基金supported by the Leading Science and Technology Project of Chinese Academy of Sciences(No.XD02001003)
文摘Safety system testing is one of the most rigorous and time-consuming requirements in the verification and validation process for reactor protection systems(RPSs).This paper presents the development of a test system for the fully digital and field-programmable gate array-based RPS of the solid fuel(SF) thorium-breeding molten salt pebble bed fluoride salt-cooled reactor(TMSR),denoted as the TMSR-SF1 project,developed by the Chinese Academy of Sciences.The test system is applied to the RPS to ensure that it fully meets its designed functions and system specifications.We first introduce the testing principles and methods.Then,the hardware component designs and the software program development of the test system are discussed.Finally,the test process and test results are discussed and summarized.
文摘高通量工程试验堆(High Flux Engineering Test Reactor,HFETR)因其高中子通量密度,用于生产各种医用同位素。针对HFETR堆芯结构复杂、非均匀性强、辐照环境变化较大的特点,以“确定论燃料管理-蒙特卡罗粒子输运-产额”耦合计算的策略建立了一套适用于不同类型同位素产额精确计算模型及方法。该方法首先通过研究堆专用燃料管理程序完成堆芯装载设计与燃耗计算,获得各时间步的燃料燃耗分布及临界棒位等参数,然后利用自编程序实现自动化全堆精细化建模,并利用蒙特卡罗方法完成输运计算。通过计算获得每一时间步下样品中不同核素与中子的反应率,通过产额求解程序与三维粒子输运蒙卡程序进行耦合,计算出下一个时间步样品内关键核素的含量变化情况,并对换料停堆和从出堆到测量期间的衰变损耗进行计算。该方法综合考虑了HFETR运行期间控制棒变化、燃料燃耗变化及计算燃耗步长的影响,利用HFETR已获得的同位素生产实验结果验证该套计算程序的准确性,对辐照88Sr生产89Sr产额的计算偏差为5.41%,对辐照生产32P产额的计算偏差为4.90%,对辐照生产177Lu产额的计算偏差为5.66%,与实验结果相比同位素产额计算偏差均在6%以内,证明该方法提高了同位素产额计算的精度,能够适用于研究堆生产同位素产额准确评估问题。
文摘The design of high current balance reactors used in the ITER DC testing platform is presented,which is verified by simulations with finite element method software,and the reactors are fabricated and tested according to the design output.These reactors are chosen as multilayer multi-turn structure and cooled by water.The multilayer multi-turn structure is usually selected by some high voltage reactors,but is seldom used in high current situations.The analysis and testing results indicate that the multilayer multi-turn structure is also feasible for high current reactors with many advantages,and is of considerable significance to similar applications.
