The invention belongs to the technical field of
nuclear power maintenance
knowledge base construction, and aims to solve the problems of difficulty in integration of unstructured knowledge, weak multi-
modal data processing capability,
knowledge updating lagging, low manual arrangement efficiency and the like in
traditional knowledge base construction. The invention discloses a
nuclear power maintenance procedure
knowledge base construction method based on a
large model and RAG optimization, and the method comprises the steps: collecting structured and
unstructured data, carrying out the classified storage, extracting
metadata, texts, tables and pictures through an
unstructured data preprocessing tool, storing the
metadata, texts, tables and pictures according to a structured specification, building a table abstract-original table bidirectional mapping relation, and carrying out the storage of the table abstract-original table. A double-layer index structure of a picture source file
library and a picture index
library is constructed to assist in retrieval of pictures and tables, a vector knowledge
library is constructed, and efficient retrieval and
knowledge generation of multi-
modal data are achieved. According to the method, diversified retrieval, multi-
modal fusion and dynamic intelligent updating can be realized, efficient knowledge support is provided for maintenance personnel, and
safe operation of the
nuclear power station is guaranteed.