Multi-attribute evaluation method of nuclear island plant overall layout schemes based on linguistic intuitionistic fuzzy VIKOR

Abstract

This paper presents a novel method for evaluating nuclear island layout schemes using linguistic intuitionistic fuzzy sets and the VIKOR approach. Nuclear island layout involves multiple, often conflicting criteria such as safety, functionality, human factors, radiation protection, and cost. Traditional methods struggle to address uncertainty and complexity in such decisions. The proposed approach builds a structured evaluation index system, uses DEMATEL-ANP to determine indicator weights, and applies linguistic intuitionistic fuzzy numbers with VIKOR for multi-criteria decision-making. The method has been validated through the evaluation and decision-making of layout schemes for the ACP100 small modular reactor, demonstrating the method’s reliability and scientific basis for evaluating nuclear island layouts. The results highlight its capability to systematically manage complexity and uncertainty while balancing diverse design priorities.