Ukraine is building new border defenses with materials brought from outside the exclusion zone. The sarcophagus of reactor 4 ...

The destruction of uranium enrichment sites that support Iran's nuclear program would not likely have severe environmental ...

The Chernobyl disaster remains one of the most devastating nuclear accidents in history. The tragic event was shaped by a series of complex factors, but one critical decision stands out: the pressing ...

Chernobyl's boron rods were tipped with graphite which triggered the dangerous reaction that caused the explosion. The graphite tips had been a cost-saving measure.

A drone armed with an explosive warhead pierced the containment shell over Chernobyl's melted-down nuclear reactor early on Friday morning, causing a small fire but major concerns for peace prospects.

In contrast, a nuclear reactor uses control rods to absorb additional neutrons so that the fission chain reaction can be sustained at lower intensity and for far longer.

Technicians wished to see whether an emergency water-cooling system would work during a power outage and, shutting down the reactor’s emergency safety system, withdrew most of the control rods ...

As were the introduction of fissile control rods that can be rapidly introduced to the core in the event of Chornobyl-like conditions in the RBMK 1500-series reactor.

On April 26, 1986, the Chernobyl Nuclear Plant’s Reactor No. 4 exploded, and the ensuing nuclear fire burned for 10 days, releasing 400 times as much radiation as the bomb dropped on Hiroshima.

Russian troop activity at the Chernobyl Nuclear Power Plant since February has led to an elevated risk of an accident or harmful radiation exposure. Ukraine regained control of the site near ...

Russian troops handed control of the Chernobyl nuclear power plant back to the Ukrainians and left the heavily contaminated site early Friday, more than a month after taking it over, Ukrainian ...