neutron-absorbing control rod

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• control rod — n. an adjustable rod or bar containing a neutron absorbing material or, in a fast reactor, fuel used to regulate the fission chain reaction inside a nuclear reactor core …   English World dictionary

• Control rod — PWR control rod assembly, above fuel element A control rod is a rod made of chemical elements capable of absorbing many neutrons without fissioning themselves. They are used in nuclear reactors to control the rate of fission of uranium and… …   Wikipedia

• control rod — /kənˈtroʊl rɒd/ (say kuhn trohl rod) noun 1. Physics a rod or tube of neutron absorbing material that can be moved in and out of a nuclear reactor to control the rate of reaction. 2. Radio the electrode in a radio valve, lying between the cathode …  

• control rod — a neutron absorbing material, as boron or cadmium, in the shape of a rod or other configuration, that can be moved into or out of the core of a nuclear reactor to regulate the rate of fission. [1940 45] * * * …   Universalium

• control rod — noun a rod of a neutron absorbing substance used to vary the output power of a nuclear reactor …   English new terms dictionary

• Neutron poison — For information on biological effects of excessive ionizing radiation, see radiation poisoning. A neutron poison (also called a neutron absorber or a nuclear poison ) is a substance with a large neutron absorption cross section in applications,… …   Wikipedia

• control — n. & v. n. 1 the power of directing, command (under the control of). 2 the power of restraining, esp. self restraint. 3 a means of restraint; a check. 4 (usu. in pl.) a means of regulating prices etc. 5 (usu. in pl.) switches and other devices by …   Useful english dictionary

• Erbium — (pronEng|ˈɝbiəm) is a chemical element with the symbol Er and atomic number 68. A rare, silvery, white metallic lanthanide, erbium is a solid in its normal state. It is a rare earth element associated with several other rare elements in the… …   Wikipedia

• Scram — This article is about nuclear reactors. For other meanings, see Scram (disambiguation). A scram or SCRAM is an emergency shutdown of a nuclear reactor though the term has been extended to cover shutdowns of other complex operations, such as… …   Wikipedia

• Dysprosium — (pronEng|dɪsˈproʊziəm) is a chemical element with the symbol Dy and atomic number 66. Characteristics Dysprosium is a rare earth element that has a metallic, bright silver luster, relatively stable in air at room temperature, but dissolving… …   Wikipedia

• China Syndrome — For the 1979 film, see The China Syndrome. For The King of Queens episode, see China Syndrome (The King of Queens). Earth cutaway from core to exosphere. The term China syndrome (loss of coolant accident) describes a nuclear reactor operations… …   Wikipedia