通过改变THOR的堆芯配置来提高硼中子俘获疗法（BNCT）的束流强度。

Increase of the beam intensity for BNCT by changing the core configuration at THOR.

作者信息

Liu H M, Peir J J, Liu Y H, Tsai P E, Jiang S H

机构信息

Nuclear Science and Technology Development Center, National Tsing Hua University, Taiwan.

出版信息

Appl Radiat Isot. 2009 Jul;67(7-8 Suppl):S247-50. doi: 10.1016/j.apradiso.2009.03.081. Epub 2009 Mar 27.

DOI:10.1016/j.apradiso.2009.03.081

PMID:19394237

Abstract

In this article, we will consider several core configurations and run the core calculation with MCNP to obtain the neutrons distribution at THOR. The thermal neutron flux inside the vertical tubes (VT-B-VT-E) and the fast neutron flux in the first row facing to the boron neutron capture therapy (BNCT) facility (I3-I5) were tallied for indication. Based on these simulation results, the fuel elements were rearranged during the annual repair period in 2007. The epithermal neutron flux at the center of BNCT beam exit in air was measured again, and the results showed that the beam intensity increased by 50%. Comparing the neutron intensities both in reactor core and at the BNCT beam exit for several core configurations, the results show that the BNCT beam intensity can be increased without decreasing the neutron intensity in core.

摘要

在本文中，我们将考虑几种堆芯配置，并使用MCNP进行堆芯计算，以获得THOR处的中子分布。对垂直管道（VT - B - VT - E）内的热中子通量以及面向硼中子俘获治疗（BNCT）设施的第一排（I3 - I5）中的快中子通量进行了计数以作指示。基于这些模拟结果，在2007年年度维修期间对燃料元件进行了重新排列。再次测量了空气中BNCT束流出口中心处的超热中子通量，结果表明束流强度增加了50%。比较几种堆芯配置下堆芯内和BNCT束流出口处的中子强度，结果表明在不降低堆芯内中子强度的情况下可以提高BNCT束流强度。