ASTM C809-2019 pdf free download
ASTM C809-2019 pdf free download.Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Aluminum Oxide and Aluminum Oxide-Boron Carbide Composite Pellets
3. Terminology
3.1 Definitions—For definitions of terms relating to nuclear materials, see Terminology C859. 3.2 Definitions ofTerms Specific to This Standard: 3.2.1 analytical or emission line—the particular wavelength of electromagnetic radiation used in determining the presence or concentration of an element. 3.2.2 calibration—the act, process, or result of establishing the relationship between the response of an instrument and the amount of analyte present. 3.2.3 calibration samples or solutions (standards)—samples or solutions with known analyte contents or analyte concentrations, respectively, to establish the relationship be- tween the response ofan instrument and the amount ofanalyte. 3.2.4 certified reference material (CRM)—a reference material, accompanied by a certificate, one or more of whose property values are certified by a procedure which establishes traceability to an accurate realization of the unit in which the property values are expressed, and for which each certified value is accompanied by an uncertainty at a stated level of confidence. 3.2.5 DCArc OES—optical emission spectrometry (OES) with direct current arc (DCArc) as excitation source. 3.2.6 ICP MS—mass spectrometry (MS) with inductively coupled plasma (ICP) as ionization source. 3.2.7 ICP OES—optical emission spectrometry (OES) with inductively coupled plasma (ICP) as excitation source. 3.2.8 matrix—all components of a material except the ana- lyte. 3.2.9 method—instructions used to produce a numerical result, which are detailed in a document referred to as “the method.” 3.2.10 optical emission spectrometry (OES)—pertaining to emission spectrometry in the ultraviolet, visible, or infrared wavelength regions of the electromagnetic spectrum. 3.2.11 sample—a portion of a material selected and pro- cessed to render its composition representative of the compo- sition of the whole. 3.2.12 standardization—the experimental establishment of the concentration of a reagent solution. 3.2.13 TIMS—thermal ionization mass spectrometry. 3.2.14 titrimetry—a method of quantitatie chemical analysis that is used to determine the concentration of an identified analyte.
4. Significance and Use
4.1 Aluminum oxide pellets are used in a reactor core as filler or spacers within fuel, burnable poison, or control rods. In order to be suitable for this purpose, the material must meet certain criteria for impurity content. These test methods are designed to show whether or not a given material meets the specifications for these items as described in Specification C785. 4.1.1 Impurity content is determined to ensure that the maximum concentration limit of certain impurity elements is not exceeded. 4.2 Aluminum oxide-boron carbide composite pellets are used in a reactor core as a component in neutron absorber rods. In order to be suitable for this purpose, the material must meet certain criteria for boron content, isotopic composition, and impurity content as described in Specification C784. 4.2.1 The material is assayed for boron to determine whether the boron content is as specified by the purchaser. 4.2.2 Determination of the isotopic content of the boron is made to establish whether the 10 B concentration is in compli- ance with the purchaser’s specifications. 4.2.3 Impurity content is determined to ensure that the maximum concentration limit of certain impurity elements is not exceeded.
5. Reagents
5.1 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all reagents shall conform to the specifications of the Commit- tee on Analytical Reagents of the American Chemical Society, where such specifications are available. 4 Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high purity to permit its use without lessening the accuracy of the determination. 5.2 Purity ofWater—Unless otherwise indicated, reference to water shall be understood to mean reagent water conforming to Specification D1193, Type III.
