nuclear-news

Inside Chornobyl: 40 years after disaster, nuclear site still at risk.

Sat 25 Apr 2026 , Guardian,

In February 2025, a cheap Russian drone tore through Chornobyl’s confinement shelter. Workers warn the site of the world’s worst nuclear accident is not safe yet.

The dosimeter clipped to your chest ticks faster the moment you step off the designated path inside the Chornobyl nuclear power plant. Step back, and it slows again – an invisible line between clean ground and contamination.

Above rises the “new safe confinement” (NSC) – the largest movable steel structure ever built, taller than the Statue of Liberty, wider than the Colosseum, its arch curving overhead like an aircraft hangar built for giant planes.

Completed in 2019 at a cost of $2.5bn (£1.85bn) and funded by 45 countries, the NSC was built to shield the world from what lies beneath it. It sits at the heart of a vast exclusion zone, a radioactive landscape the size of Cyprus, largely abandoned by humanity. Stray dogs roam the plant in packs – workers advise against petting them.

Inside is “the sarcophagus” – a grey concrete tomb erected in just 206 days to cover the ruins of reactor No 4, which exploded on 26 April 1986 in the worst nuclear accident to date.

Up close, the sarcophagus looks almost makeshift – massive slabs stacked like giant building blocks, rust streaking the joins. Inside, 180 tonnes of nuclear fuel and four to five tonnes of radioactive dust remain trapped.

The NSC was constructed to buy time: to allow the unstable sarcophagus to be dismantled safely over decades, while shielding against the consequences in case it collapses.

What its funders did not anticipate was a war – Chornobyl was occupied in the first weeks of Russia’s 2022 invasion of Ukraine – much less a drone strike on the facility three years later.

In the north-west corner of the roof, a temporary patch marks where a cheap $20,000 Russian drone tore through the structure on 14 February 2025, punching a hole in the arch and compromising the very function the arch was built for.

“If the sarcophagus collapses, over a hundred tonnes of nuclear fuel would be released into the air,” said the plant’s director general, Serhii Tarakanov.

A full repair is required within four years, Ukrainian officials and western experts say, or the NSC’s 100-year lifespan can no longer be guaranteed. It is estimated to cost up to €500m (£432m) – money that Ukraine’s cash-strapped government has not yet found.

Meanwhile, war continues in Ukraine, and Russia has repeatedly launched drones and missiles along flight paths near the Chornobyl nuclear plant, raising the risk of another disaster.

On the 40th anniversary of the Chornobyl disaster, one of the world’s most vulnerable sites remains under threat…………………………………………………………………………..

Should the sarcophagus collapse – whether from a strike, structural failure or age (built for 20 years, now standing for 40) – experts say it would release another cloud of radioactive particles into the air with no safeguard to contain it.

“The collapse of the sarcophagus would primarily be an enormous hazard for those working at the Chornobyl plant and set back dealing with the disaster for many more years,” said Shaun Burnie, a senior nuclear specialist with Greenpeace.

Beyond the financial costs and the war, there is the question of how the repairs of the confinement shelter are done at all. High radiation levels directly above the damaged section mean workers can legally spend no more than about 20 hours a year in that zone before hitting their annual dose limit.

“Workers will be able to perform their assignment there for a few hours, if not just a few minutes at a time,” said Tarakanov, adding that the work would require about 100 qualified construction workers operating in short rotations at height on a curved, contaminated surface……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..

 the exclusion zone’s isolation offers no protection from the war.

The plant has experienced four total blackouts since October 2024 caused by Russian strikes on the electricity grid, each requiring emergency diesel generators to keep the spent fuel cooling systems running.

Additional air defences and soldiers have been brought in, said Vadim Slipukha, the deputy director general for security at the site, though the threat has not gone away, he said. Even an unintentional strike from a drone knocked off course by electronic warfare could trigger a collapse of the sarcophagus.

“We are begging the international community to understand,” said Tarakanov. “There is a real risk of a new incident. It could happen any night, any day.” https://www.theguardian.com/news/ng-interactive/2026/apr/25/chornobyl-power-plant-at-risk-amid-russia-

May 2, 2026 - Posted by Christina Macpherson | safety, Ukraine