【摘 要】
：
气泡效应是指在核燃料溶液系统中,由于气泡所引起的溶液体积、中子泄露和吸收性能、中子能谱等改变而导致的系统反应性变化。在乏燃料溶解器中,溶解铀元件段时会通入氧气以加
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气泡效应是指在核燃料溶液系统中,由于气泡所引起的溶液体积、中子泄露和吸收性能、中子能谱等改变而导致的系统反应性变化。在乏燃料溶解器中,溶解铀元件段时会通入氧气以加速溶解,溶解过程中放出的热量也会导致气泡产生。当铀溶液系统存在气泡时,溶液体积会增大,必然对中子的吸收、泄漏等产生影响,改变中子能谱,进而影响系统的反应性。本实验模拟在冷态工况、给定反应堆材料和几何结构下,在不同进气速率下系统反应性的变化情况。
Bubble effect refers to the change in the reactivity of the system caused by the bubble volume, the leakage and absorption of neutrons, the change of neutron energy spectrum, etc. in the nuclear fuel solution system. In spent fuel dissolvers, oxygen is added to dissolve the uranium component to accelerate dissolution, and the heat released during the dissolution also causes bubbles to form. When bubbles are present in the uranium solution system, the volume of the solution increases, which inevitably affects the absorption and leakage of neutrons, changes the neutron energy spectrum, and affects the reactivity of the system. This experiment simulates the changes of system reactivity under different inlet velocities under cold conditions, given reactor materials and geometry.
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