India Positions Its 220 MWe PHWR Fleet as the Credible SMR Against Uncertified Foreign Designs
With 8,780 MW installed and nuclear at just 3% of generation, India is pushing its proven small reactors as a more bankable option than imported designs awaiting home-market approval.
Anil Kakodkar, former chairman of India's Atomic Energy Commission, said on September 3, 2026 that India must prioritise thorium as uranium supply tightens, warning of a structural deficit emerging in global uranium markets. The timing sharpens the debate over which reactor technology India deploys at scale.5
India's nuclear establishment is making the case that its 220 MWe pressurised heavy water reactors, built and operated for decades across the country, represent a more credible small modular reactor option than foreign designs that have not yet received certification in their vendors' home markets. The argument is grounded in an operational experience base that no imported SMR can match inside India, and it comes as the country works toward a 100 GW nuclear target by 2047.4
India operates 24 reactors across seven sites with a combined installed capacity of 8,780 MW, yet nuclear contributes only about 3% of the country's electricity generation, according to CNBC-TV18. Several PHWRs and light water reactors are under construction, with capacity expected to reach around 22 GW by 2031-32.2
The fuel supply picture is what gives Kakodkar's September 3 intervention its urgency. He said global uranium resources can support around 550 to 750 GWe of power generation capacity through a once-through cycle, while citing World Nuclear Association projections that total nuclear capacity could reach 1,400 GWe by 2050. The gap between those two numbers is not easily closed without new resource development, thorium adoption, or recycling.7
On September 4, Indian Express reported that Kakodkar advocated introducing thorium-based fuel into India's indigenous PHWR fleet alongside the ongoing three-stage programme. The government's strategy moves from natural uranium-based PHWRs to plutonium-fuelled fast breeder reactors and eventually to thorium-based reactors using Uranium-233. Thorium in PHWRs would represent an acceleration of that timeline, not a departure from it.7,6
India has simultaneously been broadening its uranium procurement network. Canada's Cameco signed a long-term agreement with India earlier this year to supply nearly 22 million pounds of uranium ore concentrate between 2027 and 2035, according to Outlook Business, citing Moneycontrol. Russia remains important for the VVER reactors at Kudankulam. The Australia-India uranium deal has been described as a game changer for India's nuclear ambitions, though delivery volumes and timing were not detailed in the source material.6,2
Nearly 22 million pounds over eight years is a meaningful near-term supply anchor. But it is a modest fraction of what a 100 GW fleet would require, and the gap between the 2031-32 target of 22 GW and the 2047 ambition of 100 GW implies procurement volumes that dwarf existing arrangements.6
Capital costs compound the execution challenge. Energy Economic Times reported in June 2026 that nuclear carries capital requirements of roughly $2 to $6 billion per gigawatt with operating lives extending beyond six decades. For India, that range could encompass serial deployment of 700 MW PHWRs, Bharat Small Reactors, and eventually fast breeder designs, alongside faster approval pathways for standardised foreign technologies meeting international norms.1
There is also an active dispute over advanced fuel for PHWRs. Chicago-based Clean Core Thorium Energy has denied safety concerns raised by India's Bhabha Atomic Research Centre over its ANEEL thorium-based fuel. The company said the current primary shutdown system would retain an estimated safety margin of 70 mk, above the required 50 mk, making redesign unnecessary.3 That dispute is unresolved and sits separately from the reactor design question, but it illustrates the regulatory friction that any new fuel faces inside India's system.
For uranium traders, the June 2026 Energy Economic Times report flagged that the next 18 months require coordinated action from the Department of Atomic Energy, the Atomic Energy Regulatory Board, and other agencies, particularly on licensing and project execution. Any policy statement from the Department of Atomic Energy formalising a licensing pathway for indigenous SMR deployment would be the cleaner near-term read. If the government moves to put thorium in PHWRs at scale, India's uranium demand curve flattens relative to a purely once-through scenario — and the Cameco supply arrangements, sized for the current fleet trajectory, may need revisiting.1