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Fuel elements for PWR and BWR are described here (from Wikipedia) There is a picture shown but pictures don't reproduce on Wikianswers.
Pressurized water reactor (PWR) fuel consists of cylindrical rods put into bundles. A uranium oxide ceramic is formed into pellets and inserted into Zircaloy tubes that are bundled together. The Zircaloy tubes are about 1 cm in diameter, and the fuel cladding gap is filled with helium gas to improve the conduction of heat from the fuel to the cladding. There are about 179-264 fuel rods per fuel bundle and about 121 to 193 fuel bundles are loaded into a reactor core. Generally, the fuel bundles consist of fuel rods bundled 14x14 to 17x17. PWR fuel bundles are about 4 meters in length. In PWR fuel bundles, control rods are inserted through the top directly into the fuel bundle. The fuel bundles usually are enriched several percent in 235U. The uranium oxide is dried before inserting into the tubes to try to eliminate moisture in the ceramic fuel that can lead to corrosion and hydrogen embrittlement. The Zircaloy tubes are pressurized with helium to try to minimize pellet cladding interaction (PCI) which can lead to fuel rod failure over long periods. In boiling water reactors (BWR), the fuel is similar to PWR fuel except that the bundles are "canned"; that is, there is a thin tube surrounding each bundle. This is primarily done to prevent local density variations from effecting neutronics and thermal hydraulics of the nuclear core on a global scale. In modern BWR fuel bundles, there are either 91, 92, or 96 fuel rods per assembly depending on the manufacturer. A range between 368 assemblies for the smallest and 800 assemblies for the largest U.S. BWR forms the reactor core. Each BWR fuel rod is back filled with helium to a pressure of about three atmospheres (300 kPa).
What else can I help you with?
What two words make pixel?
Pixel comes from the combination of "picture" and "element." It is a term used to represent the smallest unit of a digital image that can be displayed or controlled on a screen.
What is a short way of saying picture in picture?
PIP is a short way to refer to picture-in-picture.
Which method do you use to nudge a picture?
To nudge a picture, you can use the arrow keys on your keyboard to move the picture incrementally in the desired direction. Alternatively, you can click and drag the picture to reposition it as needed.
What is produced when a radioactive element decays?
When a radioactive element decays, it produces radiation in the form of alpha particles, beta particles, or gamma rays. This decay process can transform the element into a different element or a different isotope of the same element.
What type of force holds a picture on a wall?
The force that holds a picture on a wall is the force of friction between the back of the picture frame and the wall. This friction prevents the picture from sliding or falling off the wall.
What is pixel short for?
picture element
Where can you find the whole picture of the element nickel?
Type in periodic table in Google and search for a link. Type in picture of the element Nickel in Google.
What is a dot or picture element on the monitor?
pixel
What is short for picture element?
pixel
What is short for picture element on PowerPoint?
pixel
Can you have a picture of the element helium?
I don't think it has a picture because it has something to do with air around us.
Individual picture element displayed by a monitor?
a pixel
What two words are pixel made from?
picture element
What is an acronym for pixel?
The word "pixel" is itself a contraction of the words "picture element", the smallest individual part of a display image. (see related question)
What two words are combined to create the word pixel?
The word pixel was derived from 'picture element'. Pix is a popular short form for picture and el is the start of element.
What is full form of pixel?
pix- Picture el- Element
What is the most common computer acronym for a picture element?
Pixels
