What is meant by heterogeneous reactor?
[‚hed·ə·rə′jē·nē·əs rē′ak·tər] (nucleonics) A nuclear reactor in which fissionable material and moderator are arranged in a regular pattern of discrete bodies with dimensions such that a nonhomogeneous medium is presented to neutrons.
What are homogeneous and heterogeneous reactors?
Homogeneous reactor- the reactor where one phase exist for both the reactants. Hetrogenous reactor – the reactors where more than one phase exist among the reactants gas-liquid-solid.
What is homogeneous nuclear reactor?
Definition of homogeneous reactor : a nuclear reactor in which the fuel is distributed (as by being dissolved in a liquid) uniformly or approximately uniformly throughout the moderator material.
What are slurry reactors?
Slurry reactors are similar to fluidized-bed reactors in that a gas is passed through a reactor containing solid catalyst particles suspended in a fluid. In slurries, the catalyst is suspended in a liquid, whereas in fluidized beds, the suspending fluid is the reacting gas itself.
Which is used for moderator in the homogeneous nuclear reactor?
Answer. Heavy water is used for moderator in the homogenous nuclear reactor. The water need to be very pure.
What do breeder reactors produce?
A breeder reactor is a nuclear reactor that generates more fissile material than it consumes.
What is the difference between heterogeneous and homogeneous?
There are two types of mixtures: heterogeneous and homogeneous. Heterogeneous mixtures have visually distinguishable components, while homogeneous mixtures appear uniform throughout. The most common type of homogenous mixture is a solution, which can be a solid, liquid, or gas.
What are packed bed reactors used for?
Packed bed reactors are very versatile and are used in many chemical processing applications such as absorption, distillation, stripping, separation processes, and catalytic reactions. Across the diverse applications in which they are used, the physical dimensions of the beds can vary greatly.
What is a fixed bed reactor?
Fixed-bed reactors are the main type of catalytic reactors for large-scale chemical synthesis. The process is characterized by different gaseous chemical species reacting on the catalyst surface placed in a fixed position inside the reactor.
Why is D2O used as moderator?
Water containing significantly more than the natural proportions (one in 6,500) of heavy hydrogen (deuterium, D) atoms to ordinary hydrogen atoms. Heavy water is used as a moderator in some reactors because it slows down neutrons effectively and also has a low probability of absorption of neutrons.
Why cadmium rod is used in nuclear reactor?
Cadmium rods are inserted in nuclear reacter to absorb the extra nucleons any keep the nuclear reaction ratio of 1:1 , also keep the reaction stable. Cadmium has a high thermal neutron absorption cross section. Therefore cadmium rods will absorb neutrons, making them unavailable to cause fission.
What type of nuclear power plant was Chernobyl?
4 was the site of the Chernobyl disaster, as a result of this, the power plant is now within a large restricted area known as the Chernobyl Exclusion Zone….
Chernobyl Nuclear Power Plant | |
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Reactor type | RBMK-1000 |
Thermal capacity | 12,800 MW |
Power generation | |
Units decommissioned | 1 × 800 MW 3 × 1000 MW |