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Reference data
Page built2026-10-12
Data as ofAugust 2026

CNP-300

The CNP-300 is a Generation II pressurised water reactor from China National Nuclear Corporation. 5 units are operating and 0 are under construction, out of 5 on record.

Operating
5
1.7 GW gross
Under construction
0
Planned
0
Cancelled
0
0 retired

China's first indigenous PWR, a two-loop 300 MWe plant derived from naval reactor work rather than from a Western licence. Qinshan 1 was the demonstration unit; the rest of the series went to Pakistan as Chashma 1 to 4, which for two decades were the only nuclear exports China had made. Small, and the reason China had a design of its own to develop at all.

Design
VendorChina National Nuclear Corporation
Reactor typePressurised water reactor (PWR)
GenerationII
Capacity range300–350 MWe gross
CoolantLight water
Typical enrichment3–5% U-235
Where it is built
Pakistan 4 units, 4 operating
China 1 unit, 1 operating

How long it took to build

Years from construction start to grid connection, for units with both dates on record. The median across 5 finished units is 5.5 years.

UnitCountryStartedConnectedYears
Qinshan nuclear power plant 1-1China 19851991 6.7
Chashma nuclear power plant 1Pakistan 19932000 6.9
Chashma nuclear power plant 2Pakistan 20052011 5.2
Chashma nuclear power plant 3Pakistan 20112016 5.4
Chashma nuclear power plant 4Pakistan 20112017 5.5

All CNP-300 units

UnitCountryStatusGross MWOnline
Chashma nuclear power plant 1 Pakistan Operating 325 2000
Chashma nuclear power plant 2 Pakistan Operating 325 2011
Chashma nuclear power plant 3 Pakistan Operating 340 2016
Chashma nuclear power plant 4 Pakistan Operating 340 2017
Qinshan nuclear power plant 1-1 China Operating 330 1994

Sources

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