HFETR材料辐照时间快速估算方法

Quick Estimation Method of Irradiation Time of Materials in HFETR

高通量工程试验堆(HFETR)进行材料辐照时,通常需要快速确定在堆芯一定位置辐照时所需要的辐照时间。本文对HFETR第67炉9#孔道辐照W试样的辐照时间进行了快速估算,采用ANISN程序对其中子能谱进行计算,中子注量率计算采用堆芯三维程序ECP,并与第61炉的计算进行比较。计算结果表明,当HFETR运行1449MWd时,W试样可出堆,其中子注量∫φf(E≥1Me V)计算值为1.5x1019cm-2。W试样堆内辐照根据预示计算的辐照时间出堆,其中子注量测量结果为1.63x1019cm-2,与计算预示值的偏差为+8.67%,小于10%的要求,设计预示计算满足材料辐照的要求。

It is necessary to determine the irradiation time rapidly when carrying out material irradiation in the certain position of High Flux Engineering Test Reactor （HFETR） core.This paper calculated the irradiation time rapidly of the W samples irradiating within the 9# channel of HFETR 67th core .The neutron energy spectrum was calculated using ANISN code, and the neutron flux was calculated using ECP code, the calculation values were compared with the 61th core＇s results. The calculation results show that the W samples can be discharged out of the core when HFETR operated 1449MWd, and the neutron flux ∫φf（E≥1Me V） calculated was 1.5×1019cm2. The W samples were discharged out of the core according to the calculating irradiation time, the neutron flux measured was 1.63×1019cm-Z.The relative deviation between the measured value and calculated value was ＋8.67%（〈10%）,which shows that predictive calculation meets the requirements of the material irradiation.