【摘要】 作为第四代新型反应堆的快中子反应堆，是未来核能发展的主要方向之一，核数据的不确定性成为其反应堆物理计算结果不确定性的重要来源。以往的快堆不确定性研究中往往忽略隐式效应的影响，针对此问题，提出了考虑隐式效应的敏感性与不确定性计算方法，并利用该方法分析了隐式效应对钠冷快堆ZPR6/7的k_eff的敏感性与不确定性的影响。研究结果表明：少群截面相对于超细群截面的敏感性系数矩阵中，主对角线起主导作用，并且对某些核素某些反应道的敏感性系数，隐式效应的影响可能超过50%；隐式效应对²³Na以及⁵⁶Fe的不确定度影响相对较大，对⁵⁶Fe的辐射俘获影响最大，相对偏差达到了-5.6%。更多还原

【Abstract】 As a new type of fourth-generation reactor, fast neutron reactor is one of the main directions of future nuclear energy development, and the uncertainty of nuclear data has become an important source of uncertainty in the results of its reactor physics calculations. Previous fast reactor uncertainty studies have often ignored the influence of implicit effects. To address this problem, a sensitivity coefficient and uncertainty calculation method that takes implicit effects into account is proposed, and the method is used to analyze the influence of implicit effects on the sensitivity and uncertainty of the k_eff of the sodium-cooled fast reactor ZPR6/7. The results show that: the main diagonal plays a dominant role in the matrix of sensitivity coefficient of few-group cross-section to ultra-fine-group cross-section, and the effect of the implicit effect may be more than50% for the sensitivity coefficients of certain reaction channels of some nuclides; Implicit effects have a relatively large impact on the uncertainties of ²³Na and ⁵⁶Fe, with the largest impact observed for the radiative capture of ⁵⁶Fe, reaching a relative deviation of -5.6%.更多还原