1.1 本标准指南适用于制定核设施表征计划，以定义设施内放射性和化学污染的类型、大小、位置和程度，从而允许退役规划。本指南扩大了ASTM标准中关于设施特性的指导 E1281 关于核设施退役计划。本指南不涉及无条件使用设施或场地所需的方法。本指南专门针对: 1.1.1 作为退役规划的初始步骤，用于表征的数据质量目标。 1.1.2 采样方法， 1.1.3 所涉及的逻辑（统计设计），以确保充分表征退役目的； 和 1.1.4 特征信息的基本文件。 1.2 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.3 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 了解待退役核设施中的污染性质和程度对于选择最佳去污和退役方法以及估计由此产生的废物量和人员暴露至关重要。 实施根据本标准制定的表征计划将导致获得或推导上述信息。 5.2 有关拟议退役方法、废物量和估计人员辐射暴露的信息可用于定义退役项目的总体工作范围、成本、时间表和人力需求。该信息可能包含在退役计划中。过度或低估这些项目参数的程度将取决于抽样计划和统计设计，如第节所述 6.1.4 和 6.1.5 .

1.1 This standard guide applies to developing nuclear facility characterization plans to define the type, magnitude, location, and extent of radiological and chemical contamination within the facility to allow decommissioning planning. This guide amplifies guidance regarding facility characterization indicated in ASTM Standard E1281 on Nuclear Facility Decommissioning Plans. This guide does not address the methodology necessary to release a facility or site for unconditional use. This guide specifically addresses: 1.1.1 the data quality objective for characterization as an initial step in decommissioning planning. 1.1.2 sampling methods, 1.1.3 the logic involved (statistical design) to ensure adequate characterization for decommissioning purposes; and 1.1.4 essential documentation of the characterization information. 1.2 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. 1.3 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 Knowledge of the nature and extent of contamination in a nuclear facility to be decommissioned is crucial to choosing the optimum methods for decontamination and decommissioning, and estimating the resulting waste volumes and personnel exposures. Implementing a characterization plan, developed in accordance with this standard, will result in obtaining or deriving the above information. 5.2 Information on the proposed decommissioning methods, waste volumes, and estimated personnel radiation exposures can be used to define the overall work scope, costs, schedules, and manpower needs for the decommissioning project. This information may be included in the Decommissioning Plan. The extent of over- or under-estimating these project parameters will be a function of the sampling plan and statistical designs, described in Sections 6.1.4 and 6.1.5 .