After the Chernobyl accident somepeople feared that the molten fuel would explode with a force of 3 megaton, can someone explain how it would explode? I don't really understand
I think they were worried it would melt through the concrete foundations and come into contact with ground water making lots of hydrogen when it did, then that hydrogen would cause the explosion.
You can`t get an atom bomb explosion (fission or thermonuclear3784) from a nuclear power plant. Explosions always come from steam pressure in sealed vessels, but three megatons sounds way too much.
The 3-5 megaton numbers were popularized by a couple of documentaries that were less interested in accuracy than hype. U-235 and P-239 concentrations under 20% can't create a nuclear explosion no matter what you do to them or how much you amass. Reactors have never used more than 5%.
The danger was that the molten fuel would cause a massive steam explosion. Water acts as a moderator for the reaction by slowing down escaping neutrons, which in turn heats the water. Current plants take advantage of this to create a negative feedback loop - the slowing of the neutrons increases the efficacy of the reaction but heats the water, as the water heats it becomes steam and traps less neutrons, decreasing the efficacy of the reaction.
Graphite rods like those used in Chernobyl exhibit the opposite behavior - as they heat they increase the efficiency of the reaction, creating a positive feedback loop. When the graphite control rods were inserted into the core too late, they fused to it, and the temperature continued to escalate even more rapidly. Had the fuel mass descended into the aquifer with water still inside, it would have essentially made a massive geyser and sent radioactive steam into the atmosphere, which could have traveled for dozens or hundreds of miles.
>picking up a 17 Sv fuel fragment with your bare hands, all but guaranteeing cancer (1 Sv = 5.5% chance of cancer, 17 Sv = 93.5% chance of cancer)
She's so stupid her name could become a synonym for "retarded".
>1.7 rem per hour
standing next to that thing for an hour is like getting 2 and a half chest ct scans
5 rem is the anual dose limit for radiation workers btw. fucking stupid shit hippy retards
i think she did gamma spectroscopy on it and found it was mostly europium, which is an xray and alpha emitter, so shes getting that wholebody xray dose and hopefully injested and is getting fucked by 2 MeV alphas
Liquid nuclear fuel, even in copious amounts, would still not really be of any danger (Other than the multiple Sieverts emitted). It will probably not explode in a nuclear blast, but (As with Chernobyl), in a confined envoronment, make the container/building/fuel core explode from pressure. It would scatter radioactive material everywhere in hundreds of miles around it (Again, Chernobyl), but no nuclear boom. And nothing close to 3 megatons. The largest fission bomb came in at about 700 kilotons, in the UK.
there's a fill gas between an anode and cathod and radiation interacts with the gas causing ionization and excitation of electrons in the fill gas which is recorded as current between the anode and cathode and is recorded as a count. you can determine the activity by the count rate, typically counts per minute. G-M detectors dont tell you anything about what kind of radiation you're measuring or how much energy is being deposited like a scintillation detector, just the rate at which the radiation is entering the detector and causing ionization
basically the binding energy of the last neutron. U-235 is fissile because it will absorb a neutron of any energy and cause fission, whilst U-238 cant undergo fission with thermal neutrons, it needs fast neutrons in order to fission. fertile materials are capable of breeding fissile material
so basically there is a certain excitation energy needed for fission, and if the binding energy of the last neutron is greater than that excitation energy, it's fissile, but if the excitation energy for fission is lower than the binding energy of the last neutron, the neutron need to have additional kinetic energy in order to cause fission
you bunch of retards, that's the rate per hour. few thousands mSv/hr
If the radiation was mainly alpha particles then it will not even reach her skin, ingestion on the other hand, could be something fatal.