Multiple choice

Which among the following are the second generation of British gas-cooled reactors?

  1. Boiling Water Reactor

  2. Pressurized Water Reactors

  3. Liquid-Metal Fast-Breeder Reactor

  4. Advanced Gas-cooled Reactor (AGR)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

These are the second generation of British gas-cooled reactors, using graphite moderator and carbon dioxide as coolant. The fuel is uranium oxide pellets, enriched to 2.5-3.5%, in stainless steel tubes. The carbon dioxide circulates through the core, reaching 650°C and then past steam generator tubes outside it, but still inside the concrete and steel pressure vessel. Control rods penetrate the moderator and a secondary shutdown system involves injecting nitrogen to the coolant.

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