Heavy water is used as a moderator in a (A) Pressurised water reactor (PWR) (B) Boiling water reactor (BWR) (C) Candu reactor (D) Molten sodium cooled reactor

Heavy water is used as a moderator in a
(A) Pressurised water reactor (PWR)
(B) Boiling water reactor (BWR)
(C) Candu reactor
(D) Molten sodium cooled reactor
by

1 Answer

Answer :

(C) Candu reactor
by

Related questions

In a pressurised water reactor (PWR), the (A) Fuel is natural uranium and heavy water acts both as moderator & coolant (B) Coolant water boils in the core of the reactor (C) Coolant water is pressurised to prevent bulk boiling of water in the core (D) Use of moderator is not required

Description : In a pressurised water reactor (PWR), the (A) Fuel is natural uranium and heavy water acts both as moderator & coolant (B) Coolant water boils in the core of the reactor (C) Coolant water is pressurised to prevent bulk boiling of water in the core (D) Use of moderator is not required

Last Answer : (C) Coolant water is pressurised to prevent bulk boiling of water in the core

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Last Answer : (C) Boiling water

Which of the following types of nuclear reactors is most prone to radioactive hazards? (A) Pressurised water reactor (B) Gas cooled reactor (C) Molten sodium cooled reactor (D) Boiling water reactor

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Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor? (A) Molten sodium cooled (B) CO2 gas cooled (C) Pressurised water (D) Boiling water

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Candu reactor is a __________ nuclear reactor. (A) Natural uranium fuelled heavy water cooled & moderated (B) Highly enriched uranium (85% U-235) fuelled (C) Homogeneous (D) Fast breeder

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Last Answer : (A) Natural uranium fuelled heavy water cooled & moderated

Pressure in a Pressurised Water Reactor (PWR) is used for (A) Maintaining constant pressure in the primary cooling circuit under varying loads (B) Superheating the steam (C) Pressurising the water in the primary coolant circuit (D) None of these

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Last Answer : (A) Maintaining constant pressure in the primary cooling circuit under varying loads

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Give comparison of BWR and PWR.

Description : Give comparison of BWR and PWR. 

Last Answer : Sr.No.  Points Boiling Water Reactor (BWR) Pressurized Water Reactor (PWR)  1 Construction It consist of reactor vessel & there is no heat exchanger It consist of strong ... 2600c 8 Cooling Light or heavy water  Light or heavy water but under pressure 

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Last Answer : (A) Molten sodium

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Last Answer : (D) U-235 as fuel

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Last Answer : (B) Enriched uranium

Secondary cooling circuit is a must in molten sodium cooled fast breeder reactor for (A) Achieving high degree of superheat in the steam (B) Faster heat removal rate from the core(C) Lowering the coolant circulation pressure(D) Avoiding the mixing of water with radioactive sodium, as it may causeexplosion

Description : Secondary cooling circuit is a must in molten sodium cooled fast breeder reactor for (A) Achieving high degree of superheat in the steam (B) Faster heat removal rate from the core (C) ... circulation pressure (D) Avoiding the mixing of water with radioactive sodium, as it may cause explosion

Last Answer : (D) Avoiding the mixing of water with radioactive sodium, as it may cause explosion

Which of the following reactors is operated at high neutron flux and low power level? (A) Breeder reactor (B) Research reactor (C) Heterogeneous reactor (D) Liquid metal (e.g., molten sodium) cooled reactor

Description : Which of the following reactors is operated at high neutron flux and low power level? (A) Breeder reactor (B) Research reactor (C) Heterogeneous reactor (D) Liquid metal (e.g., molten sodium) cooled reactor

Last Answer : (B) Research reactor

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Last Answer : (A) Electromagnetic

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In which reactor the coolant and moderator are the same ? Pressurised water reactor.

Description : In which reactor the coolant and moderator are the same ? Pressurised water reactor.

Last Answer : Pressurised water reactor.

Coolant used in a fast breeder reactor is (A) Molten sodium (B) Heavy water (C) Ordinary water (D) Helium

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Last Answer : (A) Coolant water is allowed to boil in the core of the reactor

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Last Answer : (D) All (A), (B) and (C)

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Last Answer : (C) The fuel and the moderator is mixed to form a homogeneous material

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A heterogeneous reactor is the one, in which the moderator and the (A) Coolant are different materials (B) Coolant are present in different phases (e.g., heavy water and graphite) (C) Fuel are present in different phases (e.g. uranium and heavy water) (D) None of these

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Which reactor uses heavy water as moderator ?

Description : Which reactor uses heavy water as moderator ?

Last Answer : CANDU.

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Last Answer : (C) Is highly radioactive at elevated temperatures and can cause explosion, when it comes in contact with air or water

Which of the following has the lowest Prandtl number? (A) Molten sodium (a coolant used in fast breeder reactor) (B) Water (C) Transformer oil (D) Dilute H2SO4

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Last Answer : (A) Molten sodium (a coolant used in fast breeder reactor)

A fast breeder reactor (A) Utilises fast neutrons for causing fission (B) Converts fertile material (e.g., U-238) into fissile material (Pu-239) (C) Normally employs molten sodium as coolant (D) All (A), (B) and (C)

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Last Answer : (D) All (A), (B) and (C)

Molten sodium is used as a coolant in a fast breeder reactor, because of its (A) Excellent moderating properties (B) Neutron breeding capability (C) Faster heat removal capability from the core (D) Capability to increase the reaction rate in the core

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Last Answer : (C) Faster heat removal capability from the core

Liquid metal (e.g., molten sodium) is preferred as a coolant in case of a/an __________ reactor. (A) Homogeneous (B) Graphite moderated (C) Fast breeder (D) Enriched uranium (3% U-235) fuelled

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Pump used for the transportation of molten sodium in a fast breader reactor is a/an __________ pump. (A) Reciprocating (B) Plunger (C) Electromagnetic (D) Gear

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Last Answer : (C) Thick molten soap at 80°C

An ideal coolant for a nuclear reactor should (A) Be a good absorber of neutrons (B) Be capable of attaining high temperature, only when it is pressurised (C) Have high density, but low heat transfer co-efficient (D) Be free from radiation damage and non-corrosive

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Last Answer : (D) Be free from radiation damage and non-corrosive

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Last Answer : (A) Moving

. Lurgi coal gasifier is a pressurised __________ bed reactor. (A) Moving (B) Fixed (C) Fluidised (D) Entrained

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During manufacture of glass, molten glass is cooled slowly to make it

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Last Answer : lose brittleness.

In a homogeneous nuclear reactor, the __________ are mixed together. (A) Fuel & coolant (B) Fuel & moderator (C) Coolant & moderator (D) None of these

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Last Answer : (B) Fuel & moderator

A fast breeder reactor (A) Uses natural uranium as fuel (B) Does not require a moderator (C) Both (A) and (B) (D) Neither (A) nor (B)

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Last Answer : (B) Does not require a moderator

Graphite is a/an (A) Electrical insulator (B) Allotrope of carbon(C) Moderator used in nuclear reactor(D) Both (B) and (C)

Description : Graphite is a/an (A) Electrical insulator (B) Allotrope of carbon (C) Moderator used in nuclear reactor (D) Both (B) and (C)

Last Answer : (C) Moderator used in nuclear reactor

Net efficiency of ordinary light water cooled nuclear reactor is about __________ percent. (A) 32 (B) 52 (C) 72 (D) 88

Description : Net efficiency of ordinary light water cooled nuclear reactor is about __________ percent. (A) 32 (B) 52 (C) 72 (D) 88

Last Answer : (A) 32

Use of molten metal as a coolant in fast breeder reactor helps in (A) Rapid heat transfer from the core (B) Accelerating the reaction rate in the core (C) Breeding neutrons (D) Accelerating the neutrons

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Last Answer : (A) Rapid heat transfer from the core

Heavy water is preferred over ordinary water as a coolant, because it. (A) Acts both as an efficient coolant as well as a moderator (B) Can be heated to a higher temperature without pressurizing (C) Is less prone to radiation damage (D) All (A), (B) and (C)

Description : Heavy water is preferred over ordinary water as a coolant, because it. (A) Acts both as an efficient coolant as well as a moderator (B) Can be heated to a higher temperature without pressurizing (C) Is less prone to radiation damage (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

The most commonly used moderator in nuclear power plants is (A) Graphite (B) Light water (C) Heavy water (D) Beryllium

Description : The most commonly used moderator in nuclear power plants is (A) Graphite (B) Light water (C) Heavy water (D) Beryllium

Last Answer : Option A

The moderator used in a nuclear reactor is – (1) Uranium (2) Radium (3) Ordinary water (4) Graphite

Description : The moderator used in a nuclear reactor is – (1) Uranium (2) Radium (3) Ordinary water (4) Graphite

Last Answer : (3) Ordinary water Explanation: Light water (ordinary water) is used as the moderator in U.S. reactors as well as the cooling agent. It acts as the means by which heat is removed to produce steam for turning the turbines of the electric generators.

Which nuclear reactor uses water as a coolant, moderator and reflector ?

Description : Which nuclear reactor uses water as a coolant, moderator and reflector ?

Last Answer : Pressurised water reactor.

In a light-water reactor, the coolant is ordinary water. What is the moderator?

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Last Answer : ANSWER: WATER or THE SAME WATER