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Control rods are usually used in control rod assemblies (typically 20 rods for a commercial PWR assembly) and inserted into guide tubes within the fuel elements. Control rods often stand vertically within the core. In PWRs they are inserted from above, with the control rod drive mechanisms mounted on the reactor pressure vessel head. In BWRs ...
In light-water reactors, this is achieved by inserting neutron-absorbing control rods into the core, although the mechanism by which rods are inserted depends on the type of reactor. In pressurized water reactors the control rods are held above a reactor's core by electric motors against both their own weight and a powerful spring. A scram is ...
TCP—Transmission Control Protocol; TCP/IP—Transmission Control Protocol/Internet Protocol; TCU—Telecommunication Control Unit; TDMA—Time-Division Multiple Access; TDP—Thermal Design Power; TFT—Thin-Film Transistor; TFTP—Trivial File Transfer Protocol; TI—Texas Instruments; TIFF—Tagged Image File Format; TLA—Three-Letter Acronym
Control rods are a series of rods that can be quickly inserted into the reactor core to absorb neutrons and rapidly terminate the nuclear reaction. [2] They are typically composed of actinides, lanthanides, transition metals, and boron, [3] in various alloys with structural backing such as steel. In addition to being neutron absorbent, the ...
The term static differentiates it from DRAM, which must be periodically refreshed. sound card. Also audio card. An internal expansion card that facilitates economical input and output of audio signals to and from a computer under control of computer programs. storage device synchronous dynamic random-access memory (SDRAM)
A control rod channel filled with graphite absorbs fewer neutrons than when filled with water, so the difference between inserted and retracted control rod is increased. When the control rod is fully retracted, the graphite displacer is located in the middle of the core height, with 1.25 m of water at each of its ends.
English: Schematic drawing of control rods in a nuclear reactor. With the control rods down, the reaction is subcritical: too many neutrons are absorbed for a chain reaction to take place. Pulling up the rods makes the reactor critical, and the fuel rods start producing heat.
This is a list of terms used in the manufacture of electronic micro-components. Many of the terms are already defined and explained in Wikipedia; this glossary is for looking up, comparing, and reviewing the terms. You can help enhance this page by adding new terms or clarifying definitions of existing ones.