This Sunday marks four decades since the explosion at the Chernobyl nuclear power plant in Soviet Ukraine, an event the United Nations describes as the worst nuclear accident in recorded history, one whose consequences continue to shape communities, policy, and scientific understanding to this day.
According to the UN, the disaster affected more than 3.5 million people and contaminated approximately 50,000 square kilometres of land. The explosion and subsequent fire at Reactor No. 4 on April 26, 1986, released enormous quantities of radioactive material into the atmosphere, spreading contamination across large parts of Europe.
A site frozen in time
France Televisions was granted rare access to the Chernobyl site to mark the anniversary, offering a closer look at the exclusion zone that has largely been off-limits to the general public for four decades. The area surrounding the plant, including the abandoned city of Pripyat, has become a stark reminder of the disaster's immediate human toll, with tens of thousands of residents evacuated in the days following the explosion.
The long-term health and environmental consequences of the accident have been the subject of extensive study and ongoing debate among scientists and public health researchers. Elevated rates of thyroid cancer, particularly among those who were children at the time of the explosion, have been documented and linked to radioactive iodine released during the disaster.
Lasting impact on nuclear policy
The Chernobyl disaster had far-reaching implications beyond the immediate region. It accelerated debate about nuclear safety standards worldwide and is widely credited as one of the factors that contributed to the political transformation of the Soviet Union under Mikhail Gorbachev, who later acknowledged its role in hastening reforms.
A massive containment structure, known as the New Safe Confinement, was completed in 2016 and placed over the remains of Reactor No. 4 to prevent further release of radioactive material. The structure, funded largely through international contributions, is designed to last at least 100 years.
The 40th anniversary comes at a time of renewed international attention on nuclear risk, partly due to the ongoing conflict in Ukraine, which has raised concerns about the safety of the country's operating nuclear facilities. The Chernobyl plant itself fell briefly under Russian military occupation in early 2022 before being returned to Ukrainian control.
Ukraine and international organisations are expected to hold commemorative events this weekend to honour the victims of the disaster and the hundreds of thousands of workers, known as liquidators, who were deployed in the aftermath to contain the damage.
