Radiological characterization of selected Siemens/KWU PWR components using the MCNP-FLUKA code sequence

IF 2.3 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Annals of Nuclear Energy Pub Date : 2026-08-01 Epub Date: 2026-03-07 DOI:10.1016/j.anucene.2026.112265

Reuven Rachamin , Astrid Barkleit , Jörg Konheiser , Marcus Seidl

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Abstract

The final shutdown of an NPP is followed by a post-operational phase, during which measures are taken to prepare the plant for decommissioning. One of the essential tasks in preparing the NPP for decommissioning is to obtain precise knowledge of the radioactivity content within the plant’s components, particularly in the RPV and its internal structures, which typically exhibit the highest levels of radioactivity. To address this challenge, a novel method combining two Monte Carlo codes, MCNP and FLUKA, was developed to evaluate the activation distribution within the components of an NPP. This paper provides an overview of the methodology and demonstrates its application through the activation calculations of selected RPV internal components of a 1300 MWe Siemens/KWU PWR. The calculations yielded results with high accuracy, demonstrating that the method can serve as a non-destructive tool for radiological characterization of the plant’s components.

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使用MCNP-FLUKA代码序列对选定Siemens/KWU压水堆组件进行放射学表征

核电站的最后关闭之后是运行后阶段，在此期间采取措施准备工厂退役。在为核电站退役做准备的过程中，最重要的任务之一就是精确了解核电站各组成部分的放射性含量，特别是RPV及其内部结构的放射性含量，它们通常表现出最高的放射性水平。为了解决这一挑战，开发了一种结合两个蒙特卡罗代码（MCNP和FLUKA）的新方法来评估NPP组件内的激活分布。本文提供了该方法的概述，并通过1300兆瓦西门子/KWU压水堆选定的RPV内部组件的激活计算演示了其应用。计算结果具有很高的准确性，表明该方法可以作为一种非破坏性的工具，用于植物成分的放射性表征。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.