Horizontal Pressure Tube type
The Horizontal Pressure Tube type is a Generation II pressurised heavy water reactor from Nuclear Power Corporation of India. 17 units are operating and 3 are under construction, out of 22 on record.
Operating
17
4.8 GW gross
Under construction
3
Planned
0
Cancelled
0
0 retired
Global Energy Monitor's designation for India's standardised pressurised heavy water reactors, derived from the early CANDU units at Rajasthan and then developed independently after India's 1974 nuclear test ended Canadian cooperation. The 220 MWe unit is the most-built reactor in the Indian fleet.
Design
| Vendor | Nuclear Power Corporation of India |
|---|---|
| Reactor type | Pressurised heavy water reactor (PHWR) |
| Generation | II |
| Capacity range | 220–540 MWe gross |
| Coolant | Heavy water |
| Typical enrichment | Natural uranium, 0.71% U-235 |
Where it is built
| India | 22 units, 17 operating, 3 building |
|---|
All Horizontal Pressure Tube type units
Sources
- Horizontal Pressure Tube type — vendor documentation
- Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release — CC BY 4.0 · retrieved 2026-09-06