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IPHWR-700
India's 700 MWe PHWR, derived from the CANDU, with which India is building the world's largest heavy-water fleet.
India received CANDU technology at Rajasthan 1 in the 1960s and developed it alone after the 1974 embargo: first the IPHWR-220, then the IPHWR-540 and the IPHWR-700. The current 700 MWe design adds double containment and a passive decay heat removal system.
Kakrapar 3 and 4 have operated since 2023 and 2024; Rajasthan 7 started up in 2025 and unit 8 is still under construction, and ten more are under construction or approved at Gorakhpur, Kaiga and Mahi Banswara. It is the backbone of the Indian nuclear program.
Quick facts
| Power | 700 MWe gross |
|---|---|
| Fuel | natural uranium |
| Fleet | IPHWR-220, 540 and 700 |
| Under construction 2026 | Gorakhpur 1-4, Kaiga 5-6, Mahi Banswara 1-4 |