Victoria Gill is a science correspondent.

Chernobyl Nuclear Power Plant
Image caption, The Chernobyl site contains several nuclear waste containment facilities to prevent radioactive materials spreading

Monitoring data shows a radiation spike near the Chernobyl nuclear power plant which has been seized by Russian forces.

The site of the world's worst nuclear disaster in 1986 was taken over by Russian troops on Thursday.

Experts say that another major nuclear disaster is extremely unlikely.

Heavy military vehicles stirring contaminated soil in the exclusion zone surrounding the abandoned plant caused the rise.

There was a spike close to the damaged reactor.

You would receive a dose of radiation per hour in a location.

The dose of microsieverts you would get close to the reactor is about three units per hour. It went from 65 microSv/hrs to 65 microSv/hrs on Thursday.

Chart showing spike in radiation

There had been increases along the main routes in and out of the zone around the reactor, as well as a spike in the number of SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA was SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA SALVAGEDATA

Increased movement of people and vehicles in and around the Chernobyl zone will kick up radioactive dust that is on the ground.

It should decrease again over the next couple of days if there is no further movement.

Any military activity in the zone is concerning.

Ukrainian officials said that Russian troops captured the plant after a fierce battle.

The Russian assault on Chernobyl was called a declaration of war by the President of Ukraine.

Russian officials have not commented on the battle.

The Chernobyl site contains several nuclear waste containment facilities, including a huge protective dome that covers reactor number four, the reactor that exploded in 1986, causing the disaster.

Prof Corkhill said that the buildings are not designed to operate in a war zone.

The radioactivity in the plant has decayed significantly since 1986. She said a repeat of that disaster was extremely unlikely.

There is more concern about the fighting close to the nuclear reactor.

Nuclear plants in Ukraine

Nuclear policy expert Prof James Acton wrote on Thursday thatChernobyl is inside a large uninhabited space. Ukraine's other reactors are not the same.

Nuclear power plants are not designed for war zones.

The International Atomic Energy Agency (IAEA) said on Friday that the country's nuclear power reactor were continuing to operate safely and securely.

  • Ukraine crisis
  • Radioactive waste
  • Russia
  • Ukraine
  • Chernobyl disaster