Xi'an Zhengqinghe Environmental Technology Co., Ltd. has long been committed to the technical research and development of generator internal cooling water treatment systems. The developed nuclear-grade internal cooling water resin has high transformation rate, large working exchange capacity and long operating cycle. Long, stable operating indicators and other advantages. Nuclear-grade internal cooling water resin has applied for an invention patent, named: "A development process of nuclear-grade internal cooling water resin", patent number: 201910932995.8. The model of nuclear-grade internal cooling water resin is: ZQH-NGWR. The nuclear-grade internal cooling water resin is an imported resin with better performance than domestic resin. The resin is ultra-deeply regenerated through a special process and filled according to a special formula. The resin has undergone strict pretreatment and deep regeneration, which greatly reduces the content of low polymers and organic leachables and improves the transformation rate. The hydrogen type rate of nuclear-grade internal cooling water resin cation resin can reach more than 99%, and the hydrogen-oxygen type rate of anion resin can reach more than 95%, which greatly improves the working exchange capacity and service life. For 500~600L ion exchangers, the operating cycle can reach two and a half to four years, which is longer than the ordinary internal cooling water resin on the market. After the nuclear-grade internal cooling water resin is put into operation, for the stator cooling water system using the ion exchange alkali method, the pH value of the stator cooling water after stable operation is 8.0~9.0, the conductivity is 0.4~1.0?s/cm, Cu2+≤10? g/L. The system indicators are better than the internal cooling water quality requirements stipulated in the national standard DL/T801-2010 "Internal cooling water quality and system technical requirements for large generators".