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Diagram of an RTG used on the Cassini probe. A radioisotope thermoelectric generator (RTG, RITEG), sometimes referred to as a radioisotope power system (RPS), is a type of nuclear battery that uses an array of thermocouples to convert the heat released by the decay of a suitable radioactive material into electricity by the Seebeck effect.
The core is also known as radioisotope heat source 90 (RHS-90). In its initial state after manufacture, the generator is capable of generating 10 watts of electricity. [3] The generator contains the strontium-90 radioisotope, with a heating power of 250W and 1,480 TBq of radioactivity – equivalent to some 280 grams (9.9 oz) of Sr-90. [4]
A uniquely capable source of power is the radioisotope thermoelectric generator (RTG) – essentially a nuclear battery that reliably converts heat into electricity. [2] Radioisotope power has been used on eight Earth orbiting missions, eight missions to the outer planets, and the Apollo missions after Apollo 11 to the Moon.
Radioisotope thermoelectric generators for the Voyager program. Each RTG has a total weight of 37.7 kg, including about 4.5 kg of Pu-238 [ 3 ] and uses 24 pressed plutonium-238 oxide spheres to provide enough heat to generate approximately 157 watts of electrical power initially – halving every 87.7 years.
Diagram of an RTG used on the Cassini probe [1] Diagram of a stack of general-purpose heat source modules as used in RTGs Image of a plutonium RTG pellet glowing red hot.. GPHS-RTG or general-purpose heat source — radioisotope thermoelectric generator, is a specific design of the radioisotope thermoelectric generator (RTG) used on US space missions.
The co-inventor of PayPal, now turned alternative energy rock star, has built two companies -- solar power utility SolarCity (SCTY) and electric car company Tesla 5 Alternative Energy Sources That ...