Coolant present in the primary circuit of a pressurised water reactor is high pressure

A pressurised water reactor (PWR) uses pressurised water as a

A

Coolant

B

Working fluid in power turbine

C

Moderator

D

None of these

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

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

Lurgi coal gasifier is a pressurised __________ bed reactor.

A

Moving

B

Fixed

C

Fluidised

D

Entrained

For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness?

A

Hemispherical

B

Ellipsoidal (2 : 1)

C

Conical

D

Flat plate

Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has

A

High neutron absorption cross-section

B

Low moderating efficiency

C

High neutron scatter cross-section

D

Low neutron absorption cross-section

In case of a __________ reactor, the composition in the reactor and at the exit of the reactor is the same.

A

Semi-batch

B

Tubular

C

Batch

D

Back-mix

Which of the following gases has very high neutron capture cross-section, making it unsuitable as a coolant in nuclear reactor?

A

N₂

B

He

C

CO₂

D

H₂

__________ gas is normally not used as a coolant in a nuclear reactor, because of its high neutron capture cross-section.

A

Nitrogen

B

Hydrogen

C

Helium

D

Carbon dioxide

Which is used as a coolant in nuclear reactor due to its high capture cross-section?

A

H₂

B

N₂

C

He

D

CO₂

Coolant present in the primary circuit of a pressurised water reactor is high pressure

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