> > | |||||||||||||||||||||||||||||||||||||||
San Onofre Nuclear Generating Station, California |
|||||||||||||||||||||||||||||||||||||||
Update: September 15, 2008
Next Update: September 2009 San Onofre Nuclear Generating Station Net Generation and Capacity, 2007
Description: This 84-acre site is near San Clemente, California, in San Diego County. Unit 1 is no longer in service. This reactor was a first generation Westinghouse commercial unit that operated for 25 years, closing permanently in 1992. San Onofre, Unit 2 Nuclear Steam System Supplier (NSSS Vendor) = Combustion Engineering San Onofre, Unit 3 Nuclear Steam System Supplier (NSSS Vendor)= Combustion Engineering Pressurized-Water Reactor (PWR) In a typical commercial pressurized light-water reactor (1) the reactor core generates heat, (2) pressurized-water in the primary coolant loop carries the heat to the steam generator, (3) inside the steam generator heat from the primary coolant loop vaporizes the water in a secondary loop producing steam, (4) the steam line directs the steam to the main turbine causing it to turn the turbine generator, which produces electricity. The unused steam is exhausted to the condenser where it is condensed into water. The resulting water is pumped out of the condenser with a series of pumps, reheated, and pumped back to the steam generator. The reactors core contains fuel assemblies which are cooled by water, which is force-circulated by electrically powered pumps. Emergency cooling water is supplied by other pumps, which can be powered by onsite diesel generators. Other safety systems, such as the containment cooling system, also need power.
Containment: According to the U.S. Nuclear Regulatory Commission, containment type for both PWRs is dry, ambient pressure.1 _________________________________________ 1Dry, Ambient Pressure: a reactor containment design whose safety has been evaluated on the basis of having a dry air atmosphere at ambient pressure (0 psig) prior to the onset of a loss of coolant accident or steam pipe break. The containment design (concrete and steel tendons) must be able to take the full thermal and pressure stresses associated with the rapid energy release (steam) from a major pipe break. |
see also:
annual
nuclear statistics back to 1953
projected electricity capacity to 2030
international
electricity statistics