But whether the reactor is shutdown by control rods or neutron poison or both, there is still a lot of cooling to be done over an extended period which requires a lot of pumping which is an energy hungry pastime.
32.
The goal is to return actinides to the molten fuel mixture for eventual fission, while removing fission products that are neutron poisons, or that can be more securely stored outside the reactor core while awaiting eventual transfer to permanent storage.
33.
Additionally, there were two shutdown / control rods composed of natural uranium and boron that was enriched in the boron-10 isotope . 10 B is a very effective neutron poison that could be inserted to control and shut down the reaction.
34.
:Where batteries may have a special separate roll in a BWR plant is to directly power special emergency backup pumps whose only job is to inject " neutron poison " ( boron, boric acid etc ) directly into the reactor if other measures to shut it down fail.
35.
The table in the next section gives yields for notable radioactive ( with halflife greater than one year, plus iodine-131 ) fission products, and ( the few most absorptive ) neutron poison fission products, from thermal neutron fission of U-235 ( typical of nuclear power reactors ), computed from.
36.
Fission products and actinides produced by neutron absorption of nuclear fuel itself are normally referred to by those specific names, and " activation product " reserved for products of neutron capture by other materials, such as structural components of the nuclear reactor or nuclear bomb, the reactor coolant, control rods or other neutron poisons, or materials in the environment.
37.
Deep blue is the bulk ions, light blue is the fission products ( group I is Rb / Cs ) ( group II is Sr / Ba ) ( group III is Y and the lanthanides ), orange is the corrosion products ( from stainless steel pipework ), green are the major actinides, violet are the minor actinides and magenta is the neutron poison)
38.
However, without addition of a neutron poison or active neutron-absorber, " decreases " in fission rate are limited in speed, because even if the reactor is taken deeply subcritical to stop prompt fission neutron production, delayed neutrons are produced after ordinary beta decay of fission products already in place, and this decay-production of neutrons cannot be changed.
39.
A "'neutron poison "'( also called a "'neutron absorber "'or a "'nuclear poison "') is a substance with a large neutron-absorbing materials, also called poisons, are intentionally inserted into some types of reactors in order to lower the high reactivity of their initial fresh fuel load.
40.
This allows the reactor to be constructed with an excess of fissionable material, which is nevertheless made relatively safe early in the reactor's fuel burn-cycle by the presence of the neutron-absorbing material which is later replaced by normally produced long-lived neutron poisons ( far longer-lived than xenon-135 ) which gradually accumulate over the fuel load's operating life.
How to say neutron poison in Hindi and what is the meaning of neutron poison in Hindi? neutron poison Hindi meaning, translation, pronunciation, synonyms and example sentences are provided by Hindlish.com.
