GK
NUCLEAR SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which is the most commonly used molten metal for cooling of nuclear reactors?
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Zinc
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Sodium
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Calcium
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Mercury
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Explanation:
Detailed explanation-1: -Explanation: Sodium is the most commonly used molten metal for cooling of nuclear reactors.
Detailed explanation-2: -Sodium is a well-known low-melting-point (97.7°C) alkali metal, which has the main advantages of high thermal conductivity and low neutron absorption cross-section. Also, the relatively high boiling point (882.8°C) of sodium allows a reactor to operate at pressures close to 0.1 MPa.
Detailed explanation-3: -Sodium metal is used as a low-pressure coolant. It transfers heat extremely well and can keep a core cool without external power. It has been used extensively in both slow and fast neutron reactors (i.e. SGRs and SFRs).
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