Published: Science Reporter, May 2026 (covers “Stage 2 Success” by Sudip Karmakar and Love Sharma, and the issue’s two green hydrogen features)
The May issue pairs India’s two boldest energy bets: the fast breeder reactor that unlocks the thorium pathway, and the green hydrogen economy that decarbonises what electricity cannot.
Stage 2: The Breeder Milestone
The Prototype Fast Breeder Reactor (PFBR) at Kalpakkam attained first criticality on April 6, 2026, formally opening Stage 2 of Homi Bhabha’s three-stage nuclear programme.
- 500 MWe, sodium-cooled, operated by BHAVINI, fuelled by Uranium-Plutonium MOX made from reprocessed PHWR spent fuel
- A breeder produces more fissile material than it consumes; its blanket can convert Thorium-232 into fissile Uranium-233, the gateway to Stage 3
- The resource logic: India holds about 25 percent of the world’s thorium but only 1-2 percent of its uranium; the three-stage plan turns that imbalance into energy security
- India becomes effectively the second country after Russia to operate a commercial-scale fast breeder
The Hydrogen Journey
The National Green Hydrogen Mission (January 2023, Rs 19,744 crore) targets about 5 MMT of annual green hydrogen production by 2030, with around 125 GW of associated renewable capacity and roughly 50 MMT of CO2 abatement.
| Hydrogen colour | Source |
|---|---|
| Green | Electrolysis of water powered by renewables (zero carbon) |
| Grey | Natural gas reforming (no capture) |
| Blue | Natural gas with carbon capture |
The SIGHT programme funds electrolyser manufacturing and production incentives; hard-to-abate users (refineries, fertiliser, steel, long-haul transport) are the demand anchors.
Mains Angle
The common thread: both bets trade near-term cost for strategic autonomy: breeders multiply scarce uranium, green hydrogen substitutes imported gas and coking coal. The risks: global FBR economics remain unproven, sodium systems demand exacting safety engineering, and green hydrogen at scale needs electrolyser costs and round-the-clock renewables that do not yet exist at Indian prices. Way forward: sequence deployment behind firm offtake (fertiliser PSUs for hydrogen, grid-firming contracts for nuclear) rather than capacity targets alone.
📌 Facts Corner — Knowledgepedia
PFBR / Stage 2:
- First criticality April 6, 2026; Kalpakkam; 500 MWe; sodium-cooled; MOX fuel; BHAVINI operates
- Three stages: PHWR, FBR, thorium reactors; Th-232 breeds U-233
- India: ~25 percent of global thorium; second country after Russia with a commercial FBR
Green hydrogen:
- Mission launched January 2023; Rs 19,744 crore; 5 MMT/year by 2030; ~125 GW renewables; ~50 MMT CO2 abatement
- SIGHT funds electrolysers and production; green vs grey vs blue defined by energy source
- National Technology Day: May 11 (Pokhran-II, 1998)
Sources: Science Reporter / CSIR-NIScPR, PIB
