primary coolant

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• primary coolant circuit — pirmasis reaktoriaus kontūras statusas T sritis Energetika apibrėžtis Sistema, kurios paskirtis – šalinti reaktoriaus aktyviojoje zonoje išsiskyrusią šilumą. Pirmąjį kontūrą paprastai sudaro vamzdynai, cirkuliaciniai siurbliai, tarpiniai… …   Aiškinamasis šiluminės ir branduolinės technikos terminų žodynas

• Primary Atomic Reference Clock in Space — The Primary Atomic Reference Clock in Space or PARCS is an atomic clock mission once scheduled to fly on the International Space Station (ISS) in 2008, but cancelled to make way for the Vision for Space Exploration.[1] The mission, to have been… …   Wikipedia

• Nuclear reactor coolant — Nuclear reactor coolants Coolant Melting point Boiling point Light water at 155 bar 345 °C Mercury 38.83 °C 356.73 °C NaK eutectic 11 °C 785 °C Sodium 97.72 °C 883 °C …   Wikipedia

• Loss of coolant accident — A loss of coolant accident (LOCA) is a mode of failure for a nuclear reactor; if not managed effectively, the results of a LOCA could result in reactor core damage. Each nuclear plant s Emergency Core Cooling System (ECCS) exists specifically to… …   Wikipedia

• Pressurized water reactor — (PWRs) (also VVER if of Russian design) are generation II nuclear power reactors that use ordinary water under high pressure (superheated water) as coolant and neutron moderator. The primary coolant loop is kept under high pressure to prevent the …   Wikipedia

• Nuclear meltdown — Three of the reactors at Fukushima I overheated, causing core meltdowns. This was compounded by hydrogen gas explosions and the venting of contaminated steam which released large amounts of radioactive material into the air.[1] …   Wikipedia

• Three Mile Island accident — The Three Mile Island accident of 1979 was the most significant accident in the history of the American commercial nuclear power generating industry. It resulted in the release of a significant amount of radioactivity, an estimated 43,000 curies… …   Wikipedia

• Pebble bed reactor — Sketch of a pebble bed reactor in Italian …   Wikipedia

• Breeder reactor — Assembly of the core of Experimental Breeder Reactor I in Idaho, 1951 A breeder reactor is a nuclear reactor that generates more fissile material in fuel than it consumes.[1] These reactors are considered appealing due to their superior fuel… …   Wikipedia

• Fast breeder reactor — The fast breeder or fast breeder reactor (FBR) is a fast neutron reactor designed to breed fuel by producing more fissile material than it consumes. The FBR is one possible type of breeder reactor. The reactors are used in nuclear power plants to …   Wikipedia

• Molten salt reactor — scheme. A molten salt reactor (MSR) is a type of nuclear fission reactor in which the primary coolant, or even the fuel itself is a molten salt mixture. MSRs run at higher temperatures than water cooled reactors for higher thermodynamic… …   Wikipedia