Chashma Nuclear Power Plant Unit-1 has completed 427 days of continuous operation. The achievement came during its 18th operating cycle.
The milestone marks the longest uninterrupted operating cycle recorded by a nuclear power plant in Pakistan. The plant continued operations safely throughout the entire cycle.
Chashma Nuclear Power Plant Unit-1 is also known as C-1. It has an installed generation capacity of 325 megawatts.
The Pakistan Atomic Energy Commission (PAEC) operates the country’s nuclear power plants. It currently manages six nuclear power plants across Pakistan.
According to PAEC, C-1 maintained uninterrupted operations during its latest operating cycle. The plant completed the cycle without an interruption in its operations.
The latest performance reflects the plant’s continued contribution to the country’s electricity generation system. Nuclear power provides a steady source of electricity for the national grid.
The 427-day operating record also represents an operational milestone for Pakistan’s nuclear energy sector. Longer operating cycles can support stable electricity generation when plants maintain required safety standards.
C-1 has also recorded strong performance against international indicators. PAEC said the plant achieved a World Association of Nuclear Operators Performance Indicator Index score of 100.
The plant recorded the score during both of the first two quarters of 2026. The results provide an international performance benchmark for the facility.
The World Association of Nuclear Operators, known as WANO, evaluates nuclear power plant performance. Its indicators cover different aspects of plant operations and safety.
PAEC highlighted the results while announcing the completion of the latest operating cycle. The commission said the achievement demonstrates C-1’s operational performance.
Nuclear power plants generally operate through defined operating cycles. These cycles continue until scheduled maintenance or other operational requirements require a shutdown.
The completion of 427 days without interruption means C-1 remained available throughout the reported cycle. The milestone was achieved while maintaining the plant’s operating requirements.
The achievement adds to the operational record of Pakistan’s nuclear power programme. The country has been using nuclear energy as part of its electricity generation mix.
PAEC’s nuclear facilities include the Chashma nuclear power complex. The complex has multiple units contributing electricity to the national grid.
C-1 is one of the nuclear units operated by PAEC at Chashma. Its 325-megawatt capacity makes it an important part of the country’s nuclear generation fleet.
The latest record also comes amid efforts to maintain reliable electricity generation. Stable generation from nuclear facilities can support consistent power supply.
For Pakistan, nuclear energy remains one component of the broader electricity system. Other major sources include hydropower, natural gas, coal, renewable energy, and other generation technologies.
The 427-day milestone therefore represents a notable operational achievement for Pakistan’s nuclear sector. It also highlights the importance of plant reliability and performance monitoring.
PAEC said C-1’s performance indicators remained strong during the reported period. The WANO score of 100 was recorded in both quarters mentioned by the commission.
The results cover the first two quarters of 2026. They provide a recent measure of the plant’s reported international performance.
The latest development demonstrates continued operations at one of Pakistan’s established nuclear power facilities. C-1 will continue operating according to its approved procedures and requirements.
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The completion of the 18th cycle sets a new continuous-operation record for a nuclear power plant in Pakistan. It also adds another milestone to the country’s nuclear energy programme.
