We must not demonize nuclear energy. The important thing is the dose of radioactivity, not the radioactivity , as important is the dose of oxygen, hydrogen or any other element with which we interact. Oxygen or hydrogen should not be stigmatized (although together, in the form of H20, it has caused millions of drowning victims throughout history).
However, those who abhor nuclear power are likely to have their fears reinforced by what appears to be happening at the Chernobyl plant .
The basic neutron rate has increased, stabilized, and decreased again
The Chernobyl accident was a nuclear accident that occurred on April 26, 1986 at the Vladimir Ilyich Lenin nuclear power plant, located in northern Ukraine. It is considered the worst nuclear accident in history , and together with the Fukushima I nuclear accident in Japan in 2011, as the most serious on the International Scale of Nuclear Accidents.
But the nightmare might not be over . Ukrainian researchers from the Institute for Nuclear Power Plant Safety Problems (ISPNPP) have recently detected an unusually high amount of neutrons (a fission signal) emanating from an inaccessible room at the Chernobyl nuclear power plant, suggesting that a fission reaction has begun to take place.
When part of the Unit Four reactor core melted on April 26, 1986, the uranium fuel rods, its zirconium cladding, graphite control rods, and sand that were poured into the core to try to extinguish the fire melted into lava. It flowed into the basement rooms of the reactor room and hardened into formations called fuel-containing materials (FCM), which are loaded with approximately 170 tons of irradiated uranium, 95% of the original fuel.
The concrete and steel sarcophagus called Shelter , erected a year after the accident to house the remains of Unit Four, allowed rainwater to seep in. Because water slows or moderates neutrons and thus increases their chances of hitting and splitting uranium nuclei, rains sometimes raised the neutron count. After a downpour in June 1990, a Chernobyl scientist sprayed a solution of gadolinium nitrate , which absorbs neutrons. Several years later, the plant installed gadolinium nitrate sprinklers on the roof of the Refuge. But the spray cannot effectively penetrate some basement rooms.
If it were to be intervened, then, perhaps humans or robots should pierce the room and spray it with a liquid that contains a substance like gadolinium nitrate. According to Neil Hyatt , Professor of Nuclear Materials Chemistry at the University of Sheffield and a member of the UK Radioactive Waste Management Committee:
The basic neutron rate has increased, stabilized, and decreased again. That is obviously what we hope will happen. The situation is cause for concern but not alarm, although if the rate of neutron production continues to increase, intervention may be necessary.
Although the chances are low, scientists cannot rule out the possibility of some kind of accident. In this case, it would occur gradually, but there may be an "uncontrolled release of nuclear energy," Hyatt added. In the worst case, that radiation would contaminate the closest surroundings .