Abstract

In the prototype fast breeder reactor Monju, fixed absorber worth was measured as the difference of core reactivity measured by control rod worth between cores with and without a single fixed absorber or three fixed absorbers. In this paper, the measurements are evaluated in detail, and their reliability and usefulness as validation data are investigated through a comparison with calculations using the latest neutronics design methodology developed at Japan Atomic Energy Agency. Calculated-to-experiment values and their uncertainties of fixed absorber worth were 1.00 ± 0.05 and 1.02 ± 0.04, respectively. Through this study, the measurements and calculations were found consistent and reliable.

摘要

在原型快中子增殖反应堆文殊中，固定吸收器价值被测量为通过控制棒价值测量的堆芯反应性差异，在有和没有单个固定吸收器或三个固定吸收器的堆芯之间。在本文中，详细评估了测量结果，并通过与使用日本原子能厅开发的最新中子学设计方法的计算进行比较来研究它们作为验证数据的可靠性和实用性。计算到实验值及其固定吸收器价值的不确定性分别为 1.00 ± 0.05 和 1.02 ± 0.04。通过这项研究，发现测量和计算是一致和可靠的。