用核噪声方法测量氢化锆零功率堆的瞬发中子衰减常数

PROMPT NEUTRON DECAY CONSTANT MEASUREMENT ON ZrH_(1.7) ZERO POWER REACTOR FROM NUCLEAR NOISE ANALYSIS

摘要: <正> 瞬发中子衰减常数α是反应堆的重要动态参数,由次临界和临界状态下的瞬发中子衰减常数可以刻度出反应堆的次临界深度。在瞬发中子衰减常数的测量中,脉冲中子源方法是经常使用的非常成熟的方法。本文叙述另一种方法——核噪声方法测量瞬发中子衰减常数,这种方法使用中子探测器,探测堆内中子水平的涨落,通过对中子涨落信号的分析处理,导出瞬发中子衰减常数α。与脉冲中子源方法相比,核噪声方法的优点是测量方法简单,只需在反射层内放置中

Abstract: The paper describes a method of measuring prompt neutron decay constantfrom nuclear noise analysis. The prompt neutron decay constants of subcriticaland critical state on a ZrH_(1.7) zero power reactor are determined, respectively. Theprompt neutron decay constants obtained by pulsed-neutron source method arealso given. The agreement of measured results by both methods is good.