【国外标准】 Standard Test Methods for Chemical, Mass Spectrometric, Spectrochemical, Nuclear, and Radiochemical Analysis of Nuclear-Grade Plutonium Nitrate Solutions

4.1 These test methods are designed to show whether a given material meets the purchaser's specifications.4.1.1 An assay is performed to determine whether the material has the specified plutonium content.4.1.2 Determination of the isotopic content of the plutonium in the plutonium-nitrate solution is made to establish whether the effective fissile content is in compliance with the purchaser's specifications.4.1.3 Impurity content is determined by a variety of methods to ensure that the maximum concentration limit of specified impurities is not exceeded. Determination of impurities is also required for calculation of the equivalent boron content (EBC).4.2 Fitness for Purpose of Safeguards and Nuclear Safety Applications—Methods intended for use in safeguards and nuclear safety applications shall meet the requirements specified by Guide C1068 for use in such applications.1.1 These test methods cover procedures for the chemical, mass spectrometric, spectrochemical, nuclear, and radiochemical analysis of nuclear-grade plutonium nitrate solutions to determine compliance with specifications.1.2 The analytical procedures appear in the following order:  Sections Plutonium by Controlled-Potential Coulometry 2Plutonium by Amperometric Titration with Iron(II) 2Plutonium by Diode Array Spectrophotometry  Free Acid by Titration in an Oxalate Solution 8 to 15Free Acid by Iodate Precipitation-Potentiometric Titration  Test Method 16 to 22Uranium by Arsenazo I Spectrophotometric Test Method 23 to 33Thorium by Thorin Spectrophotometric Test Method 34 to 42Iron by 1,10-Phenanthroline Spectrophotometric Test Method 43 to 50Impurities by ICP-AES  Chloride by Thiocyanate Spectrophotometric Test Method 51 to 58Fluoride by Distillation-Spectrophotometric Test Method 59 to 66Sulfate by Barium Sulfate Turbidimetric Test Method 67 to 74Isotopic Composition by Mass Spectrometry 75 to 76Plutonium-238 Isotopic Abundance by Alpha Spectrometry  Americium-241 by Extraction and Gamma Counting 77 to 85Americium-241 by Gamma Counting 86 to 94Gamma-Emitting Fission Products, Uranium, and Thorium by Gamma-Ray Spectroscopy 94 to 102Rare Earths by Copper Spark Spectrochemical Test Method 103 to 105Tungsten, Niobium (Columbium), and Tantalum by Spectro- chemical Test Method 106 to 114Sample Preparation for Spectrographic Analysis for General Impurities 115 to 1181.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific safeguard and safety hazard statements, see Section 6.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.