1.1 本试验方法描述了一种单程流通（SPFT）试验方法，可用于测量核固化体（模拟或实际）在低于100°C的温度下在各种试验溶液中的溶解速率，包括但不限于均质或非均质玻璃或玻璃陶瓷。可以在溶解物种对溶解速率的影响最小化的条件下进行测试，以测量特定温度和pH值下的正向溶解速率，或测量溶解速率对各种溶质物种浓度的依赖性。 1.2 通过以连续或脉冲流模式将溶液泵送通过包含试样的反应室进行测试。建议在几种溶液流速下进行测试，以评估流速对固化体溶解速率的影响。 1.3 本试验方法不包括静态试验方法，其中通过手动从反应池中取出溶液并用新鲜溶液替换来模拟流动。 1.4 可以用软化水、化学溶液（如pH缓冲溶液、模拟地下水溶液和盐水）或实际地下水进行测试。 1.5 可以用已知粒径的破碎固化体或具有已知几何表面积的整体试样进行测试。可以检查反应后的固体，以提供有关测试中固化体行为和反应机理的额外信息。 1.6 可以用含有放射性核素的固化体进行测试。然而，这种测试方法并没有解决放射性样本的安全问题。 1.7 这些测试的数据可用于确定计算处置系统中固化体长期腐蚀行为所需的动力学模型参数的值（例如，参见实践 C1174 ). 1.8 该测试方法必须按照数据验收的所有质量保证要求进行。 1.9 以国际单位制表示的值应被视为标准。括号中给出的值仅供参考。 1.10 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.11 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 5.1 该测试方法对SPFT测试装置的设计进行了规定性描述，并确定了SPFT测试性能的各个方面以及实验人员必须解决的测试结果解释，以提供对测量溶解速率的信心。 5.2 本试验方法中描述的SPFT试验方法可用于表征固化体腐蚀行为的各个方面，这些方面可用于机械模型，例如计算核废玻璃的长期行为。 5.3 根据所使用的测试参数的值，SPFT测试的结果可用于测量固化体的固有溶解速率、速率的温度和pH依赖性，以及各种溶解物质对溶解速率的影响。 5.4 从测试中回收的反应样品可以用表面分析技术（如扫描电子显微镜）进行检查，以进一步表征腐蚀行为。如果试样表面形成了特定的浸出层和次生相，此类检查可以提供有关固化体是否按化学计量溶解的证据，等等。这些情况可能会影响使用这种方法测量的固化体溶解速率的准确性。 本试验方法不涉及固体反应材料的分析。

1.1 This test method describes a single-pass flow-through (SPFT) test method that can be used to measure the dissolution rate of nuclear waste forms (simulated or actual), including, but not limited to, homogenous or heterogeneous glass or glass ceramics, in various test solutions at temperatures less than 100 °C. Tests may be conducted under conditions in which the effects from dissolved species on the dissolution rate are minimized to measure the forward dissolution rate at specific values of temperature and pH, or to measure the dependence of the dissolution rate on the concentrations of various solute species. 1.2 Tests are conducted by pumping solutions in either a continuous or pulsed flow mode through a reaction cell that contains the test specimen. It is recommended that tests are conducted at several solution flow rates to evaluate the effect of the flow rate on the waste form dissolution rate. 1.3 This test method excludes static test methods in which flow is simulated by manually removing solution from the reaction cell and replacing it with fresh solution. 1.4 Tests may be conducted with demineralized water, chemical solutions (such as pH buffer solutions, simulated groundwater solutions, and brines), or actual groundwater. 1.5 Tests may be conducted with crushed waste form of a known size fraction or monolithic specimens having known geometric surface area. The reacted solids may be examined to provide additional information regarding the behavior of the waste form in the test and the reaction mechanism. 1.6 Tests may be conducted with waste forms containing radionuclides. However, this test method does not address safety issues for radioactive samples. 1.7 Data from these tests can be used to determine the values of kinetic model parameters needed to calculate the waste form corrosion behavior in a disposal system over long periods (for example, see Practice C1174 ). 1.8 This test method must be performed in accordance with all quality assurance requirements for acceptance of the data. 1.9 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.10 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. 1.11 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. ====== Significance And Use ====== 5.1 This test method provides a prescriptive description of the design of a SPFT test apparatus and identifies aspects of the performance of SPFT tests and interpretation of test results that must be addressed by the experimenter to provide confidence in the measured dissolution rate. 5.2 The SPFT test method described in this test method can be used to characterize various aspects of waste form corrosion behavior that can be utilized in a mechanistic model, for example, calculating long-term behavior of a nuclear waste glass. 5.3 Depending on the values of test parameters that are used, the results of SPFT tests can be used to measure the intrinsic dissolution rate of a waste form, the temperature and pH dependencies of the rate, and the effects of various dissolved species on the dissolution rate. 5.4 The reacted sample recovered from a test may be examined with surface analytical techniques, such as scanning electron microscopy, to further characterize the corrosion behavior. Such examinations may provide evidence regarding whether the waste form is dissolving stoichiometrically, if particular leached layers and secondary phases were formed on the specimen surface, and so forth. These occurrences may impact the accuracy of the waste form dissolution rate that is measured using this method. This test method does not address the analysis of solid reaction materials.