The Pressurized Water Reactor designs are similar for the units provided by the various manufacturers. Differences are illustrated by the table below:. A number of simplified diagrams courtesy Westinghouse illustrate the design of the pressurized water reactor facilities. The following are colored perspective and arrangement drawings of Reactor Coolant System Reactor Vessel Reactor Coolant Pump Steam Generator Pressurizer The flow paths are illustrated by a colored graphic flow diagram and a black and white line drawing.
Pressurized water reactor
Pressurized water reactor - Wikipedia
A pressurized heavy-water reactor PHWR is a nuclear reactor , commonly using natural uranium as its fuel, that uses heavy water deuterium oxide D 2 O as its coolant and neutron moderator. The heavy water coolant is kept under pressure, allowing it to be heated to higher temperatures without boiling, much as in a pressurized water reactor. While heavy water is significantly more expensive than ordinary light water, it creates greatly enhanced neutron economy , allowing the reactor to operate without fuel-enrichment facilities offsetting the additional expense of the heavy water and enhancing the ability of the reactor to make use of alternate fuel cycles. At the beginning of , 31 heavy water cooled and moderated nuclear power plants were in operation, having a total capacity of The key to maintaining a nuclear reaction within a nuclear reactor is to use the neutrons released during fission to stimulate fission in other nuclei. With careful control over the geometry and reaction rates, this can lead to a self-sustaining chain reaction , a state known as " criticality ". Natural uranium consists of a mixture of various isotopes , primarily U and a much smaller amount about 0.
PWR – Pressurized water reactor
In a pressurized water reactor the primary cooling water is under pressure of around atm and its inlet temperature around degree centigrade. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Hottest Questions. Previously Viewed.
These reactors were originally designed by Westinghouse Bettis Atomic Power Laboratory for military ship applications, then by the Westinghouse Nuclear Power Division for commercial applications. Industry consolidation has occurred so that Framatome-ANP and Westinghouse are two key remaining manufacturers. Refuelings are done with the plant shutdown. Only 1 is expected to have radioactivity - the Reactor Coolant System.