医院中子照射器中子束流出口处热中子注量率的测量  

Measurement of Thermal Neutron Fluence Rate of In-hospital Neutron Irradiator by SSNTD

作　　者：彭旦[1] 鲁谨[1] 邹淑芸[1] 李义国[1] 

机构地区：[1]中国原子能科学研究院反应堆工程研究设计所,北京102413

出　　处：《原子能科学技术》2013年第8期1368-1370,共3页Atomic Energy Science and Technology

摘　　要：医院中子照射器是基于微型反应堆而设计的专门用于硼中子俘获治疗(BNCT)的核反应堆装置,其额定功率为30kW。在堆芯相对两侧分别设有一条热中子束流和超热中子束流用于病人照射,在热中子束流内引出一条实验用热中子束流,用于瞬发γ法测量病人血硼浓度。本工作利用235 U裂变靶和白云母探测片测量了热、超热和实验用热中子束流出口处的热中子绝对注量率。结果显示,在30kW额定功率运行时,热、超热和实验用热中子束流出口处的热中子注量率分别为1.67×109、2.44×107和3.03×106 cm-2.s-1。以上结果达到了BNCT设计要求,并能满足瞬发γ测量血硼浓度的要求。In-hospital neutron irradiator （IHNI） is an especially designed nuclear device based on Miniature Neutron Source Reactor （MNSR） for boron neutron capture therapy （BNCT）. Its rated power is 30 kW. There are a thermal neutron beam and an epithermal neutron beam for treating patients at the opposite of the core. From the thermal neutron beam, a test beam is fetched out for measurement of boron concentration in blood by prompt γ neutron activation analysis （PGNAA） method. The neutron fluence rates at the end of thermal, epithermal and test neutron beam were measured by easU fissile target and mica slice detector. At rated power, they are 1.67 × 109, 2.44 × 107 and 3.03 × 106 cm2 . s-1, respectively. The results show that the thermal and epithermal neutron fluence rate can meet the requirement of BNCT and test neutron fluence rate meets the requirement of PGNAA.

关 键 词：医院中子照射器 热中子注量率 固体径迹探测器 

分 类 号：TL375[核科学技术—核技术及应用]