The PWR is unique from the BWR in the fact that there are two loops. [1] The PWR is one of three light water reactors and produces about 65,100 net megawatts (electric). However, it will try to describe the today used technology of PWR and BWR fuel to achieve best possible reliability, efficiency and safety. Most of the U.S. reactors are pressurized water reactors. Another advantage is that the PWR can operate at higher pressure and temperature, about 160 atmospheres and about 315 C. This provides a higher Carnot efficiency than the BWR, but the reactor is more complicated and more costly to construct. It is, of course not possible to go into any detail of the today used designs. of PWR and BWR fuel and the fuel performance achievable by those designs. THE BOILING WATER REACTOR. In the United States, 69 out of 104 commercial nuclear power plants licensed by the U.S Nuclear Regulatory Commission are PWR's. Index Fission concepts If you take a look at both of the diagrahms, they are generally the same in structre. The Search for Life in the Universe Documentary - Voyage To The Planets And Beyond The Solar System Space & The Universe HD 6,524 watching Live now The boiling water reactor (or BWR) is a fairly obvious alternative to the PWR. It is the second most common type of electricity-generating nuclear reactor after the pressurized water reactor (PWR), which is also a type of light water nuclear reactor. Your question renews the debate between the BWR and the PWR relative safety. A Pressurized Water Reactor (PWR) A Boiling Water Reactor (BWR) [2] In an archetypal design of a PWR, as represented in Fig. Nuclear power & reactors worldwide *as of 31.07.15 Sources: World Nuclear Association, IAEA **The world total includes six reactors on Taiwan with a combined capacity of 4927 MWe, which generated a total of 40.8 billion kWh in 2014, accounting for 18.9% of its electricity generation. Retrospective Historical Review 1, heat is created inside the core of the reactor. This first loop in the PWR is highly pressurized and the water in it reaches extreme temperatures without boiling - this is possible due to the high pressure. Each has its own merits as well as disadvantages, but what happened in Japan initially had nothing to do with the reactor design, it probably had everything to do with engineering/cost trade-offs and possibly a lack understanding/listen ing to the reactors' designers.. If the water is allowed to boil within the core, and the steam passed directly to the turbine, then there is no need for a separate steam generator. PWR vs BWR • BWR stands for Boiling Water reactor while PWR refers to Pressurized Water Reactor • In BWR, pressure vessel is used to make steam whereas there is a steam generator in PWR • More than 70% of the nuclear power generators that use light water are PWR in US. > Advantages * The reactor vessel and associated components operate at a substantially lower pressure of about 70–75 bars (1,020–1,090 psi) compared to about 155 bars (2,250 psi) in a PWR. A boiling water reactor (BWR) is a type of light water nuclear reactor used for the generation of electrical power. The direct-cycle philosophy of a BWR design reduces heat loss between the core and the steam turbine, but the BWR operates at lower pressures and temperatures than the PWR, giving it less thermodynamic efficiency. The United States, 69 out of 104 commercial nuclear power plants licensed by the U.S nuclear Commission! 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