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English: Nuclear reactor: pressurized water type. Water is heated through the splitting of uranium atoms in the reactor core. The water, held under high pressure to keep it from boiling, produces steam by transferring heat to a secondary source of water. The steam is used to generate electricity.
English: Schematic diagram of an Advanced Gas-cooled Reactor type nuclear reactor 1. Charge tubes 2. Control rods 3. Graphite moderator 4. Fuel assemblies 5. Concrete pressure vessel and radiation shielding 6. Gas circulator 7. Water 8. Water circulator 9. Heat exchanger 10. Steam
After the Cold War ended, 100 tons of surplus weapons grade plutonium existed and the System 80+ was assessed to be the best available way to "denature" it beyond use in typical bomb designs, the "burning"/fissioning process would produce reactor grade plutonium, which while still a security concern, it is considerably diminished.
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- A pressurised heavy water reactor is a nuclear power reactor that uses unenriched natural uranium as nuclear fuel and heavy water as moderator and as primary coolant. The heavy water is kept under pressure in order to raise its boiling point, allowing it to be heated to higher temperatures and thereby carry more heat out of the reactor core.
1943 Reactor diagram using boron control rods. Control rods are inserted into the core of a nuclear reactor and adjusted in order to control the rate of the nuclear chain reaction and, thereby, the thermal power output of the reactor, the rate of steam production, and the electrical power output of the power station.
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