Rooppur Nuclear Power Plant stands on the west bank of the Padma river in Ishwardi upazila, Pabna district. Construction began in November 2017 under a turnkey contract with Rosatom subsidiary Atomstroyexport. Two VVER-1200 reactors, each rated at 1,200 MW, give a combined installed capacity of 2,400 MW, making Rooppur the largest single generation investment in Bangladesh's history.

Fuel-Load Milestone and Commissioning Sequence

The Bangladesh Atomic Energy Regulatory Authority (BAERA) issued the operating-stage licence for Unit 1 on April 16, 2026. Fuel loading began on April 28 and was completed on May 12, 2026, when all 163 fuel assemblies were seated in the reactor core.

The commissioning sequence now moves to installation of the upper reactor unit and in-core instrumentation, followed by a controlled rise to minimum criticality. Power is then raised in steps: 3, 5, 10, 20, and 30 percent of rated capacity. Grid connection requires stable operation at roughly 30 percent (360 MW). The Science and Technology Adviser announced a target of approximately 300 MW added to the national grid by the third week of August 2026. After grid connection, the reactor ramps toward 1,200 MW commercial output over a pilot-operation period estimated at 8 to 12 months.

Unit 2 follows an independent commissioning timeline and is not yet at the fuel-load stage.

The Financing Structure

The $11.38 billion Russian state export credit, governed by the 2016 Intergovernmental Credit Agreement (IGCA), is the dominant financing instrument. The loan funds approximately 90 percent of the main construction contract; Bangladesh's own contribution covers the remainder.

Repayment was originally due to begin March 2027. Delays in transfer to Rosatom's Sonali Bank account, caused by US sanctions on Russian financial institutions following the Ukraine war, created arrears on the earlier $500 million feasibility-study loan. Protocol-2, signed July 14, 2025, resolved both issues: repayment start was deferred to September 15, 2028 (18 months later), and $164.17 million in potential late-payment penalties on the feasibility loan were waived entirely.

Under Protocol-2, principal is repaid in 38 semi-annual instalments of $189.67 million each, payable on March 15 and September 15 of each year. Annual principal obligation: approximately $379 million. At an illustrative interest rate of 3 percent per annum (the concessional rate in the IGCA) applied to roughly $7.2 billion in outstanding balance at the start of repayments, first-year interest could reach $215 million. Combined first-year debt service: illustratively $590-600 million. The schedule runs to approximately 2047.

Protocol-2 also introduced a strict penalty clause: any payment delayed beyond 30 days is subject to daily interest at a 150 percent annualised rate, eliminating future flexibility.

Debt-Service Context

Bangladesh's total government external debt stood at $77.28 billion as of June 30, 2025, or 18.99 percent of GDP, well within the 40 percent threshold (ERD FY25 report). However, the Rooppur loan is denominated in US dollars, must be serviced in hard currency, and is concentrated with a single geopolitical creditor. The $379 million annual principal alone represents roughly 0.5 percent of GDP at current exchange rates, a sustained drain on foreign-exchange reserves that persists regardless of plant performance.

Revenue to offset this service depends on Rooppur electricity being dispatched and tariffed. The Bangladesh Power Development Board (BPDB) will purchase output at an announced tariff. The tariff level and dispatch priority relative to cheaper gas-fired capacity will determine how quickly revenue accrues. Any prolonged forced outage concentrates the debt burden without corresponding generation revenue.

Energy-Mix Implications

Bangladesh's 27,515 MW installed capacity (July 2024, BPDB) generated electricity in 2024 from: natural gas and LNG (~55 percent), oil and HFO (~22 percent), coal (~20 percent), and renewables under 3 percent (Ember/Low Carbon Power 2024). The grid is gas-dependent and pays elevated spot LNG prices when pipeline supply is short.

Rooppur's 2,400 MW of nuclear base-load, once fully commissioned, would represent roughly 8.7 percent of current installed capacity but a larger share of actual firm dispatchable output, because much existing capacity operates at low plant-load factors. Nuclear displaces liquid-fuel peakers at the margin, reducing exposure to volatile HFO and spot LNG prices. The Integrated Energy and Power Master Plan 2023 targets 40 percent clean energy by 2041; nuclear is the only committed large-block clean addition on the schedule.

Regulatory and Operational Dependencies

BAERA was constituted under the BAERA Act 2012 and the Nuclear Power Plant Act 2015. It is a young regulator overseeing the country's first nuclear facility. The ~95 percent turnkey nature of the Rosatom contract means that specialised operations and maintenance knowledge, spare-parts supply, and fuel fabrication all route through Russia for the foreseeable future. There is no domestic uranium enrichment, fuel fabrication, or spent-fuel reprocessing capacity.

Spent fuel is returned to Russia under the bilateral agreement, deferring the waste-management challenge. Long-term decommissioning liability remains a sovereign obligation without a dedicated fund or regulatory schedule publicly disclosed.

Outlook

August 2026 will be the first commercial test: whether ~300 MW flows to the grid on schedule. Any slippage will extend the period of paying debt service without generation revenue. Beyond commissioning, the 20-year repayment schedule and vendor dependence require Bangladesh to build regulatory depth and operational capacity that does not yet exist at scale. The Rooppur project is both a necessary base-load addition and a concentrated sovereign-financial risk that will define energy-sector balance sheets through 2047.