GB/T 17569-1998

This standard establishes a classification system for items (components, structures, and systems) within pressurized water reactor nuclear power plants, categorizing them based on their safety significance and quality requirements. It is applied by nuclear plant designers, manufacturers, and regulators to determine the appropriate design, manufacturing, inspection, and testing levels for each item, ensuring safety-critical components meet the highest reliability standards. The classification directly influences procurement specifications and quality assurance protocols throughout the plant's lifecycle.