In nuclear power plants the main purpose is to reduce the radiation exposure to persons and staff in the vicinity of radiation sources. … This radiation shielding protects the reactor vessel and its internals (e.g. the core support barrel) from the excessive heating due to gamma ray absorption fast neutron moderation.
How does shielding improve safety in a nuclear reactor?
Distance: Just as the heat from a fire is less intense the further away you are, so the intensity and dose of radiation decreases dramatically as you increase your distance from the source. Shielding: Barriers of lead, concrete, or water provide protection from penetrating radiation such as gamma rays and neutrons.
What is the purpose of using shielding techniques?
Radiation shielding serves three major functions: (i) thermal shielding to protect the pressure vessel, coolant loop, and inner shield from the intense heat generated by the absorption of nuclear radiations, (ii) biological shielding to protect personnel and assure safeguards to public health, and (iii) apparatus and …
Why shielding of a reactor is necessary What do you understand by thermal shielding?
in nuclear engineering, means for protecting the external parts of a reactor—for example, concrete components of biological shielding, which cannot withstand great increases in temperature—from heat-generating radiation emitted by the reactor core.
Can onion absorb radiation?
Similarly, research has shown that onions too absorb the Gamma rays. Besides, Indian practices based on herbal methods, including applying gram flour (besan) and mustard oil on the human skin, too minimise the effects of radiation, Uttam said.
Which type of disposal of nuclear waste is cheapest and easiest method of all?
Which type of disposal of nuclear waste is cheapest and easiest method of all? Explanation: This is one of the easy and cheapest methods of disposal because soil absorbs radioactive material easily. This disposal is suitable mostly in areas of low rainfall at points which are high above the ground water level. 6.
How does a boiling water reactor work?
Boiling water reactor boils light water that is fed to the reactor. The evaporated steam is then fed directly to the steam turbine. Steam then flows through the steam turbine and is cooled down in the condenser. The water is then pumped back to the cycle by major circulating pump.