China unveils first independently developed 6-MW-class emergency diesel generator for nuclear plants

2026-09-23 Ecns.cn Editor：Mo Honge

(ECNS) -- CSSC Power (Group) Corporation Limited unveiled China’s first independently developed 6-MW-class emergency diesel generator set for nuclear power plants in Shanghai on Tuesday.

Hechai No. 1, China’s first independently developed 6-MW-class emergency diesel generator set for nuclear power plants. (Photo provided by the interviewee)

Hechai No. 1, China’s first independently developed 6-MW-class emergency diesel generator. (Photo provided by the interviewee)

Known as Hechai No. 1, the unit has a full-load output of 6,600 kilowatts and can start in under 10 seconds. It has a mean time between failures of more than 2,000 hours.

Emergency diesel generators provide backup power to critical safety systems in the event of a normal power supply failure, helping ensure safe reactor shutdown and prevent accidents from escalating.

The new 6-MW-class unit complements an 8-MW-class Hechai No. 1 unit released in December 2024, broadening the product portfolio for different nuclear power applications.

(By Helen Mo, intern Yang Hongran)