DOE-HDBK-1017/2-93Plant MaterialsPROPERTIES CONSIDERED WHEN SELECTING MATERIALSPROPERTIES CONSIDERED WHEN SELECTING MATERIALSThere are many different kinds of materials used in the construction of a nuclearfacility. Once constructed, these materials are subjected to environments andoperating conditions that may lead to material problems. This chapter discussesconsiderations for selection and application of plant materials.EO 1.1DEFINE the following terms:a.Machinabilityb.Formabilityc.Stabilityd.FabricabilityEO 1.2IDENTIFY the importance of a material property and itsapplication in a reactor plant.OverviewDuring the selection and application of materials used for construction of a nuclear facility, manydifferent material properties and factors must be considered depending upon the requirements foreach specific application. Generally, these consist of both non-fuel reactor materials, used forstructural and component construction, and fuel materials. This chapter discusses some of theconsiderations used in the selection process for plant materials including material properties, fuel,fuel cladding, reflector material, control materials, and shielding materials.MaterialPropertiesThe following properties are considered when selecting materials that are to be used in theconstruction of nuclear facilities.MachinabilityComponents may be formed by removing metal "chips" by mechanical deformation. Thisprocess is referred to as machining. Machinabilitydescribes how a metal reacts tomechanical deformation by removing chips, with respect to the amount of metaleffectively removed and the surface finish attainable. The mechanical properties of themetal will be the factors that influence the machinability of a metal. Many components used in nuclear reactor construction use machined parts that requirevery close tolerances and very smooth surfaces. Thus, machinability becomes animportant consideration when choosing materials for manufacturing these parts.Rev. 0Page 1MS-05
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