开发基于 DRAGON5 代码的计算方案，用于 VVER 型反应堆棒材和组件的中子研究

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Annals of Nuclear Energy Pub Date : 2024-10-07 DOI:10.1016/j.anucene.2024.110961

Cyprien Richard , Mathias François , Lucas Fede , Alain Hébert

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引用次数: 0

摘要

VVER 型反应堆的开源建模可能成为东欧的中期目标。由于确定性代码 DRAGON5 可以满足这一需求，我们将 DRAGON5 与随机参考代码 SERPENT2 进行了对比。我们的验证包括来自乌克兰赫梅利尼茨基-2 反应堆的 7 个单元和 4 个组件，燃料成分的异质性水平范围很广。我们开发并比较了两种计算方案。第一种是 ALAMOS 方案，在能量和空间分辨率方面高度离散化；第二种是类似 REL2005 的方案，在两个层面上进行计算（一个在能量方面高度离散化，另一个在空间方面高度离散化）。在所研究的大多数情况下，这两种方案都能提供令人满意的精确度（如 keff 小于 300 pcm），尽管在使用钆中毒燃料进行能量沉积时会遇到一些困难。类似 REL2005 的方案虽然结果明显不如 ALAMOS 方案，但计算时间更短，改进的主要途径仍有待探索。这项工作为在 DRAGON5 中模拟 VVER 型反应堆迈出了第一步，并为全堆芯模拟铺平了道路。

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Development of a computational scheme based on the DRAGON5 code for the neutronic study of VVER-type reactor rods and assemblies

Open source modeling of VVER-type reactors could become a medium-term objective in Eastern Europe. As the deterministic code DRAGON5 could meet such a need, we confronted DRAGON5 against a stochastic reference code, SERPENT2. Our validation comprises 7 cells and 4 assemblies from the Khmelnitsky-2 reactor in Ukraine, within a wide range of heterogeneity levels in fuel composition. Two calculation schemes have been developed and compared. The first, the ALAMOS scheme, is highly discretized in energy and spatial resolution, while the second, the REL2005-like scheme, is calculated in two levels (one highly discretized in energy and the other highly discretized in space). In the majority of cases studied, both schemes offer satisfactory accuracy (e.g. less than 300 pcm in

k_{eff}

), although there are difficulties related to energy deposition with gadolinium-poisoned fuel. While showing significantly poorer results than the ALAMOS scheme, the REL2005-like scheme offers lower computation times and major avenues for improvement remain to be explored. This work offers a first step towards the simulation of VVER-type reactors in DRAGON5, and paves the way for full-core simulations.

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来源期刊

Annals of Nuclear Energy 工程技术-核科学技术

CiteScore

4.30

自引率

21.10%

发文量

632

审稿时长

7.3 months

期刊介绍： Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.