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| Becquerel:
What if Stocking was actually a Project Manhattan scientest? |
| IkeTheGeneric:
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| Kidalex90:
--- Quote from: Stocking on December 29, 2016, 01:18:33 AM ----nukes- --- End quote --- oh god why |
| TheABELBOTO:
--- Quote from: Stocking on December 29, 2016, 01:18:33 AM ---you cant "overload" a modern reactor because most plants are LWRs, meaning that it uses a thermal fuel with light water as the moderator. as the water heats up the average cross-sectional area for scattering goes down. in a LWR, the coolant and the moderator are the same thing, so as the fuel plates get hotter it the coolant (also the moderator) reflects in less neutrons back into the core so reactor power goes down. this relationship basically limits the steady-state power while reactor I&C will protect against high SUR casualties older reactors can theoretically be "overloaded," like with chernobyl (LMFR) here the fuel plates were cooled by water but it was moderated by graphite. in this case, the water actually acts as a poison by thermalizing neutrons and preventing them from causing fission. so when the reactor overheats, the coolant gets hotter and thermalizes less neutrons, so reactor power goes up even more. this kind of thermal runaway can quickly boil the water, which will cause massive spikes in reactor power proportional to the void coefficient. as the fuel plates continue to heat up, at around ~4000F at the surface, the fuel matrix will interact with the water to rapidly create hydrogen which will eventually build up to extreme pressures and explode (a la chernobyl). i could be a project monarch mindslave and youd never know --- End quote --- then do that |
| Juncoph:
--- Quote from: Stocking on December 29, 2016, 01:18:33 AM ---you cant "overload" a modern reactor because most plants are LWRs, meaning that it uses a thermal fuel with light water as the moderator. as the water heats up the average cross-sectional area for scattering goes down. in a LWR, the coolant and the moderator are the same thing, so as the fuel plates get hotter it the coolant (also the moderator) reflects in less neutrons back into the core so reactor power goes down. this relationship basically limits the steady-state power while reactor I&C will protect against high SUR casualties older reactors can theoretically be "overloaded," like with chernobyl (LMFR) here the fuel plates were cooled by water but it was moderated by graphite. in this case, the water actually acts as a poison by thermalizing neutrons and preventing them from causing fission. so when the reactor overheats, the coolant gets hotter and thermalizes less neutrons, so reactor power goes up even more. this kind of thermal runaway can quickly boil the water, which will cause massive spikes in reactor power proportional to the void coefficient. as the fuel plates continue to heat up, at around ~4000F at the surface, the fuel matrix will interact with the water to rapidly create hydrogen which will eventually build up to extreme pressures and explode (a la chernobyl). --- End quote --- finally something i can easily copypasta when people say meltdowns are a legitimate concern nowadays |
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