WIMSD4-SN 程序系统的校核计算

为了校验ＷＩＭＳＤ４－ＳＮ程序系统能否用于２００ＭＷ核供热堆组件计算，利用燃料组件计算程序包ＴＰＦＡＰ对其进行了一系列的校算，得到结论：１）ＷＩＭＳＤ４－ＳＮ程序系统在归并低温堆燃料棒栅元参数时，等效栅元模型与普通栅元模型有较大差别，最终证明应该用等效栅元模型。并且，在不含毒物棒情况下，等效栅元可作为组件计算的近似；２）在组件不含Ｇｄ情况下，ＷＩＭＳＤ４－ＳＮ可以用于组件计算，在含Ｇｄ可燃毒物质量分数较高时，不适于进行组件计算。

Verification computation of the WINSD4 SN program system

In order to verify whether the WIMSD4 SN program system can be used in the assembly calculation of 200 MW nuclear heating reactor, it is compared with the TPFAP, which is a transmission probability fuel assembly program package and was proved to be used successfully in assembly calculation of the nuclear heating reactor (NHR). There are several useful results: 1) when WIMSD4 SN is used in collapsing fuel rod cross section of NHR, there is a relatively big difference between the equivalent cell and the common cell and the equivalent cell model is preferred in the assembly calculation. Moreover, the equivalent cell calculation may approximately substitute assembly calculation if the assembly has no poison; 2) WIMSD4 SN is proved to be suitable for the assembly which does not include gadolinium but unsuitable for the assembly which includes high weight percent gadolinium.