What are homogeneous and heterogeneous reactors?

December 2, 2019 Off By idswater

What are homogeneous and heterogeneous reactors?

Homogeneity can be achieved if the fuel is in liquid form, where the liquid is circulated for heat transfer to a steam generator. One variant of this reactor type was known as the aqueous homogenous reactor because the fuel was mixed with water (H2O or D2O).

What are the 2 types of nuclear reactors used in the US?

U.S. nuclear power plants use two types of nuclear reactors Nuclear power plants in the United States have either a boiling-water reactor or a pressurized-water reactor.

What is homogeneous nuclear 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 is meant by heterogeneous reactor?

a nuclear reactor that is constructed to isolate the fuel from the other elements and materials of the core. The presence of heat-releasing elements, such as fuel assemblies and fuel channels, is an indication of the heterogeneous nature of a reactor.

What is an example of a heterogeneous reaction?

Some examples of heterogeneous reactions are the reaction of solid metals with acids, the corrosion of iron, the electrochemical reaction occurring in batteries and electrolytic cells are all subjected to a heterogeneous reaction.

What are the two types of nuclear?

The two types of nuclear reactions are fusion and fission. Nuclear fusion is when lighter elements combine to form heavier elements, whereas nuclear fission is when heavier elements split apart to form lighter elements.

What do breeder reactors produce?

Breeder reactors are designed to generate nuclear fuel at the same time as producing energy for electricity production. This is possible because a small number of isotopes will capture neutrons produced in a reactor, starting a reaction that leads to a new, heavy fissile isotope.

Which is used for moderator in the homogeneous nuclear reactor?

Heavy water is used for moderator in the homogenous nuclear reactor.

What is homogeneous core?

Homogeneous multicore systems have more than one core and share the same architecture and microarchitecture. Example of this is the Arm quad-core Cortex-A53 system; each core is identical in this system. Heterogeneous multicore systems have two or more cores that differ in architecture or microarchitecture.

What do you mean by heterogeneous nuclear reactor?

We have been tacitly assuming that the reactors under consideration are what are sometimes known as heterogeneous, in which the fuel, coolant, and moderator (if any) are distinct physical entities. All reactors used today for power generation are of this form.

Are there any homogenous reactors in the US?

Nonetheless, some interest remains in homogenous reactors, particularly in molten-salt reactors (see, e.g., Ref. [5]).3 In fact, one of the reactors selected for possible long-term development under the Generation IV program is a molten-salt reactor (see Chapter 16).

Where did the homogeneous reactor experiment take place?

In the so-called homogeneous reactor experiment, two small reactors, called HRE-1 and HRE-2, were built at Oak Ridge National Laboratory (ORNL) in the 1950s.1 For HRE-2, the fluid was uranyl sulfate (UO2SO4) in heavy water (D2O), with the uranium highly enriched in 235 U.

What kind of fluid is used in nuclear reactors?

The fluid was a mixture of fluoride compounds, including the fissile component 235 UF4 and the fertile component ThF4. After initial operation, 233UF4 was successfully tried as an 1 For a description of the history of this program and the ORNL program on molten-salt breeders, see Chapter 6 of Ref. [3].