Which material is used as controller in nuclear reactor?

Which material is used as controller in nuclear reactor?

A rod, plate, or tube containing a material such as hafnium, boron, etc., used to control the power of a nuclear reactor. By absorbing neutrons, a control rod prevents the neutrons from causing further fissions.

What substances are used as moderators in a nuclear reactor?

Water (sometimes called “light water” in this context) is the most commonly used moderator (roughly 75% of the world’s reactors). Solid graphite (20% of reactors) and heavy water (5% of reactors) are the main alternatives.

Which material is used as control rod in a nuclear reactor Mcq?

Coolant can either be liquid or gas. Explanation: Control rods are made of cadmium or boron or Hafnium.

Which material is used in controlling chain reaction in nuclear reactor Mcq?

Chain reaction is controlled either by removing in the fuel rods by or inserting neutron absorbs materials. The material use for control rods must have very high absorption capacity for neutrons. The commonly used materials for control rod are cadmium, hafnium or boron. Thorium.

What is used as a controller in a nuclear reactor to absorb neutrons and reducing its number?

Control rods are used in nuclear reactors to control the rate of fission of the nuclear fuel – uranium or plutonium. Their compositions include chemical elements such as boron, cadmium, silver, hafnium, or indium, that are capable of absorbing many neutrons without themselves fissioning.

Is graphite used as moderator in nuclear reactor?

What does graphite do in Advanced Gas-cooled Reactors? The graphite bricks act as a moderator. They reduce the speed of neutrons and allow a nuclear reaction to be sustained.

Which of the following material can be used as a moderator Mcq?

Explanation: At present the common moderator materials used are graphite, ordinary water and heavy water.

What are used to control the chain reaction in a nuclear reactor Mcq?

The moderator in the nuclear reactor slows down the neutrons in the reactor to sustain the chain reaction. Examples of moderators used are water, beryllium, graphite, heavy water, etc.

What is the use of graphite in nuclear reactor?

Graphite has been used as a moderator and reflector of neutrons in more than 100 nuclear power plants and in many research and plutonium-production reactors. It is used primarily as a neutron reflector or neutron moderator, although graphite is also used for other features of reactor cores, such as fuel sleeves.

How Graphite is used in nuclear reactor?

The correct answer is for reducing the velocity of neutrons. Nuclear reactors are devices in which nuclear chain reaction is controlled.

Which material is used in controlling chain reaction in a nuclear reactor Mcq?

How are control rods used in nuclear power plants?

Control rods are rods, plates, or tubes containing a neutron absorbing material (material with high absorbtion cross-section for thermal neutron) such as boron, hafnium, cadmium, etc., used to control the power of a nuclear reactor. By absorbing neutrons, a control rod prevents the neutrons from causing further fissions.

How are materials selected for a nuclear plant?

Thus, nuclear materials must be selected or specified based upon their strength and interactions with the environment (including the effects of radiation), all of which are dependent upon the metallurgy of the material. 2.1 Metallurgy and Irradiation Effects

How does a steam generator work in a nuclear reactor?

This primary coolant is pumped through the reactor core where it absorbs heat from the fuel rods. It then passes through the steam generator, where it transfers its heat (via conduction through metal) to lower-pressure water which is allowed to boil. Unlike PWRs, boiling water reactors (BWRs) do not use steam generators.

What kind of steel is used in nuclear reactors?

The body of the reactor vessel is constructed of a high-quality low-alloy carbon steel, and all surfaces that come into contact with reactor coolant are clad with a minimum of about 3 to 10 mm of austenitic stainless steel (e.g. 304L) in order to minimize corrosion.