The delegation, which included members of the European Bank for Reconstruction and Development's nuclear safety department, came a month after Chernobyl unit 4's giant shelter was damaged by a drone strike.
The State Emergency Service of Ukraine has said that work to tackle the smouldering fires in the insulation layers of Chernobyl's giant shelter has been completed, three weeks after it was struck by a drone. The International Atomic Energy Agency says radiation levels have remained at normal levels.
More than 400 people have been working in shifts since the damage was caused to the giant shelter structure covering the area of Chernobyl's unit 4. International Atomic Energy Agency experts report that radiation levels remain normal.
In an update on Thursday at 17:00 local time, the Chernobyl nuclear power plant operator said thermal imaging monitoring of the New Safe Confinement was continuing and parts of the exterior cut into "for the final elimination of smouldering areas".
Firefighters worked across the weekend to tackle smouldering roof insulation in the giant protective shelter which covers Chernobyl's unit 4 following the drone strike on Friday. Radiation levels in the area remain normal - the original protective shelter inside the giant structure did not suffer any damage.
International Atomic Energy Agency staff at the Chernobyl site say "radiation levels inside and outside remain normal and stable" after a drone was reported to have struck the roof of the shelter built over the remains of the reactor destroyed in the 1986 accident.
The State Nuclear Regulatory Inspectorate of Ukraine has given approval for the commissioning of the Solid Waste Retrieval Facility and Solid Waste Processing Plant at the Chernobyl nuclear power plant site.
The head of the State Nuclear Regulatory Inspectorate of Ukraine, Oleg Korikov, has urged against any further delays in the project to dismantle the unstable shelter facility, which was built at speed in 1986 to cover Chernobyl's damaged unit 4.
The area around the Chernobyl nuclear power plant is one of the places being looked at as potential locations for Ukraine's planned future wave of small modular reactors.
The next phase of the project has begun to study which parts of the shelter built rapidly around Chernobyl's unit 4 after the 1986 accident need immediate dismantling and which bits need stabilisation.
