Model-driven Early Functional Design and Verification of Small and Modular Natural Circulation Lead-based Fast Reactors

doi:10.3969/j.issn.1004-132X.2026.05.006

Abstract

Abstract:

The traditional document-based nuclear power equipment development pattern had problems such as discrete and poorly correlated design information， ambiguous design intentions that were difficult to trace， and a lack of intuitiveness and immersion in the design argumentation processes. Taking the small and modular natural circulation lead-based fast reactor（NCLFR） as the research object and taking the assembly and disassembly processes as an example， the MBSE method was combined with the virtual prototype technology， and three aspects of requirement analysis， functional design， and functional verification were discussed. Based on the independently developed MBSE modeling platform M-Reactor in the China Nuclear Power Technology Research Institute Co.， Ltd.， the requirement analysis and functional design of the assembly and disassembly processes were carried out. On the basis of the early 3D modeling of the NCLFR， the consistent mapping and model linkage between the system logic model and the functional virtual prototype were achieved， verifying the completeness， correctness， and traceability of the assembly and disassembly processes， providing designers with a more immersive design experience and a visual design verification method. In this way， the results may provide a reference for the applications of the MBSE method in the systematic design of nuclear power equipment.

Key words: lead-based fast reactor, model-based systems engineering（MBSE）, functional design and verification, virtual prototype

摘要：

传统基于文档的核电装备研制模式存在设计信息离散且关联性差、设计意图易产生歧义且难追溯、设计论证过程缺乏直观性与沉浸性等问题。以小型模块化自然循环铅基快堆（NCLFR）为研究对象，以其组装和拆解过程为例，将基于模型的系统工程（MBSE）方法与虚拟样机技术相结合，从需求分析、功能设计、功能验证三个方面进行了论述，基于中广核研究院自主研发的核工业领域化MBSE建模平台M-Reactor开展组装和拆解过程的需求分析和功能设计，在对NCLFR进行早期三维建模的基础上实现了系统逻辑模型与功能虚拟样机的一致映射与模型联动，验证了组装和拆解过程的完备性、正确性以及可追溯性，带给设计人员更为沉浸的设计体验以及可视化的设计论证方式，可为MBSE方法在核电装备系统设计中的应用提供参考。

关键词: 铅基快堆, 基于模型的系统工程, 功能设计与验证, 虚拟样机

CLC Number:

TH122

WU Xuanyu, FENG Yixiong, CHEN Zhao, YUAN Weiquan, DUAN Chengjie, HONG Longzhuang, ZHANG Zhifeng, TAN Jianrong. Model-driven Early Functional Design and Verification of Small and Modular Natural Circulation Lead-based Fast Reactors[J]. China Mechanical Engineering, 2026, 37(5): 1063-1071.

吴轩宇, 冯毅雄, 陈钊, 原伟铨, 段承杰, 洪龙庄, 张志峰, 谭建荣. 模型驱动的小型模块化自然循环铅基快堆早期功能设计与验证[J]. 中国机械工程, 2026, 37(5): 1063-1071.

Figures/Tables 13

Fig.1 Schematic diagram of the NCLFR

Tab.1 Main technical parameters of the NCLFR

堆芯热功率/MW	40
总蒸汽量t/h	40
燃料	UO₂
设计寿命/年	60
换料周期/年	10~15
一回路冷却剂	铅基冷却剂
一回路循环方式	自然循环
一回路运行温度/℃	400~540
一回路运行压力	常压
二回路冷却剂	铅基冷却剂
二回路运行温度/℃	380~520
三回路冷却剂	高压水-水蒸气
出口蒸汽温度/℃	510
三回路蒸汽压力/MPa	21

Fig.2 Clean life cycle process for the steam generation of the NCLFR

Fig.3 Overall process of the proposed method

Fig.4 Requirements diagram of the NCLFR assembly and disassembly process

Fig.5 Use case diagram of the NCLFR assembly and disassembly process

Fig.6 Overall activity diagram of the NCLFR assembly and disassembly process

Fig.7 Sub-activity diagram of the NCLFR assembly and disassembly process

Fig.8 Internal module diagram of the NCLFR assembly and disassembly process

Fig.9 Construction and processing for the early three-dimensional design model of the NCLFR

Fig.10 Blueprint for loading logical information data of the NCLFR assembly and disassembly process

Fig.11 Functional entity blueprint of the NCLFR assembly and disassembly process

Fig.12 System logic model-function virtual prototype joint simulation of the NCLFR assembly and disassembly process

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