列宁格勒核电站1、2号机组退役后加力燃烧的计算模拟

Yu. A. Alimov, N. Galeyeva, A. Zhirnov, P. Kuznetsov, I. Rozhdestvenskiy
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引用次数: 0

摘要

RBMK-1000反应堆在连续换料模式下运行。反应堆堆芯由从新鲜燃料组件到最燃尽燃料组件的各种燃料组成。在反应堆关闭退役后,大多数辐照燃料组件(IFA)在运行中的核电站机组中有进一步使用的潜力(所谓的加力燃烧)。大多数辐照燃料组件都有燃耗分数,燃耗分数远低于规定的阈值。电池中的中子倍增系数超过堆芯平均值,因此,IFA负载使得将反应性裕度提高到所需值成为可能。在其他动力装置的反应堆中重复使用乏燃料组件有许多优点。在经济方面,加力燃烧能够减少新燃料组件(FFA)的使用。在放射性废物处理方面,加力燃烧能够减少辐照燃料组件的数量,这些组件需要在乏核燃料储存库中长期储存,从而减少了放射性废物处理负荷。JSC NIKIET提议使用列宁格勒核电站3号和4号反应堆退役后关闭的1号和2号机组的辐照燃料组件。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
COMPUTATIONAL SIMULATION OF POST-DECOMMISSIONING AFTERBURNING OF FAS FROM UNITS 1 AND 2 OF LENINGRAD NPP
The RBMK-1000 reactor operates in a continuous refueling mode. The reactor core comprises FAs across the burn-up spectrum, from fresh fuel assemblies to the most burnt-up ones. Following the reactor shutdown for decommissioning, the majority of irradiated fuel assemblies (IFA) have the potential for further use (the so-called afterburning) at operating NPP units. Most of the irradiated fuel assemblies have a burn-up fraction, which is far from the specified threshold value. The neutron multiplication factor in the cell exceeds the core average value and, therefore, the IFA loading makes it possible to increase the reactivity margin to the desired value. Reuse of spent fuel assemblies in reactors at other power units offers a number of advantages. In economic terms, afterburning is able to reduce the use of fresh fuel assemblies (FFA). In terms of radioactive waste handling, afterburning is able to reduce the number of irradiated fuel assemblies, which require long-time storage in a spent nuclear fuel repository thus reducing the IFA and radioactive waste disposal loads. JSC NIKIET has proposed the use of irradiated fuel assemblies from units 1 and 2 of Leningrad NPP shut down after decommissioning in reactors at units 3 and 4 of the same NPP.
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