
第32卷第1期 2012年3月
核科学与工程
Nuclear Science and Engineering
一种测量快堆α。自
的方法研究
高辉,刘晓波,蒋
勇,范晓强
(中国工程物理研究院核物理与化学研究所,四川绵阳621900)
Vol.32No.1 Mar.
2012
摘要:在超瞬发临界状态下,直接测量脉冲前沿的功率上升,得到瞬发中子增殖常数(。)。在超缓发临界,刻度调节棒的反应性当量,累加调节棒的反应性当量得出爆发脉冲的预加反应性。由超发临养实验数据外推得到了CFBR-II堆缓发临界解发中子衰减常数(a,)和反应性定向差。测量得到的ae与 Rossi-a方法测量得到的结果一致,
关键词:脉冲堆;超瞬发临界;缓发临界膜发中子衰减常数;定向差
中图分类号:TL375
文章标志码:A
文章编号:0258-0918(2012)01-0016-03
Amethodofmeasuringaeonfastneutronreactor
GAOHui,LIUXiao-bo,JIANGYong,FANXiao-qiang
(Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics,Mianyang of Sichuan Prov,621900, China)
Abstract: The power rise of burst leading edge is measured at super prompt criticality and prompt neutron breeding constant (a) is gained through fitting the curve of power. We calibrate the reactivity of rod at super delay criticality and deduce the pre-load reactivity from the reactivity of rod. The prompt neutron decay constant at delay criticality (a) and directional difference on CFBR-II are got from deduction of experimental data at super prompt criticality. The measured ae accords with the result of Rosii-a.
Key words: burst reactor; super-prompt criticality; prompt neutron decay constant at delay criticality;directional difference
缓发临界瞬发中子衰减常数α是表征核系统的重要特征参数,综合反映堆内瞬发中子的动力学行为。a。的测量常用的方法有Rossi-α方法(1)]和脉冲中子源法[(2]等,这些方法有的
收稿日期:2011-02-20;修回日期:2012-01-04
直接在缓发临界状态测量,有的是在次临界测量,通过次临界的结果外推得到αa。而本文尝试在CFBR-II堆[3]超瞬发临界状态下外推到缓发临界点,得到ac。实验中反应性由小到大
作者简介:高辉(1979—),男,山东人,助研,博士,现主要从事反应堆工程与物理研充 16