In charge of manufacturing or modifying equipment intended to enter a nuclear power plant according to the RCC-M, you need to analyze the content of chlorides, fluorides and sulfides in your products, according to Appendix V of the RCC-M.
Indeed, these corrosion precursors are highly controlled for any material entering a nuclear power plant.
Also, the analyses can be done by combustion or by leaching, and this by ion chromatography (CLI).