Superheated steam is produced directly inside which of the following reactor types________________?
Show answer Hide answer
Answer: B. gas cooled
Explanation
Gas-cooled reactors circulate high-temperature gases like helium or carbon dioxide to produce superheated steam directly. These high gas temperatures enable efficient thermodynamic cycles without needing separate external superheater components. Gaseous coolants absorb heat from the core and transfer it efficiently to steam generator turbine loops. Superheated steam contains thermal energy above the saturation temperature corresponding to its operating pressure. Gas-cooled reactor designs typically operate at elevated temperatures compared to traditional water-cooled power reactors. Carbon dioxide and helium gases remain chemically stable and neutron-transparent under extreme reactor operating conditions.
Advanced gas-cooled nuclear reactors achieve higher thermal efficiencies in electricity generation than typical light water reactors. Power plant operators utilize superheated steam to drive high-pressure turbine stages without damaging turbine blades. This technology supports high-temperature industrial process heat applications alongside carbon-free electricity generation. Boiling water reactors generate saturated steam rather than superheated steam directly inside the primary vessel. Pressurized water reactors require secondary steam generators because primary water remains subcooled under high pressure. All of the above is incorrect because only gas-cooled reactors produce superheated steam directly in this manner.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. Solid nuclear reactor fuels are commonly manufactured into compact geometric shapes such as___________________?
Show answer Hide answer
Answer: D. any one of the above
Solid nuclear fuels are manufactured into multiple geometric forms like cylindrical pellets, plates, and pins. These diverse shapes accommodate different reactor core designs, cooling requirements, and power output targe...
Q2. Nuclear reactors engineered specifically for marine or vehicle propulsion are designed to feature_______________?
Show answer Hide answer
Answer: B. enriched uranium
Compact reactors designed for marine or vehicle propulsion require enriched uranium to achieve high power density. Enriched fuel allows the physical reactor core to remain remarkably small while generating immense therma...
Q3. Which of the following statements is demonstrably false?
Show answer Hide answer
Answer: D. Fast reactor uses moderator
Fast reactors are designed without moderators to keep the kinetic energy of neutrons extremely high. Removing the moderator prevents neutrons from slowing down into the thermal energy spectrum. Therefore, stating that a...
Q4. The most widely utilized material for radiation shielding applications is__________________?
Show answer Hide answer
Answer: A. lead or concrete
Lead and dense concrete are the premier materials chosen for effective radiation shielding applications worldwide. Lead provides exceptional attenuation for gamma rays due to its high atomic number and density. Dense con...
Q5. The thermal efficiency realized by a nuclear power plant in comparison to a standard conventional thermal plant is________________?
Show answer Hide answer
Answer: C. less
Due to metallurgical temperature limitations of reactor materials, steam temperatures are lower than in fossil plants, yielding lower thermal efficiency. Operating temperatures in nuclear reactors are constrained to prev...
Q6. What magnitude of activation energy must be supplied to a radioactive nucleus to prompt the emission of a neutron________________?
Show answer Hide answer
Answer: D. 7.8 MeV
Certain radioactive nuclei require a specific minimum threshold of energy to eject a neutron. Experimental measurements confirm that this required activation energy is approximately 7.8 Mega-electron-volts. Supplying thi...