ISO 7503和ISO 8769针对负责测定固体表面放射性的人员。 ISO 7503-3:2016适用于通过直接和间接测量方法，根据单位面积的放射性对表面污染进行评估，并涉及仪器校准的复杂方面。 ISO 7503-3:2016适用于定义明确的表面，如设备和设施、放射性材料容器、密封源以及建筑物或土地的表面。 ISO 7503-3:2016可用于实验室和设备/安装控制，以及修复和监测活动，以符合释放标准。 ISO 7503的本部分还涉及以下内容: -处理具有复杂排放特性的放射性核素或无参考校准源的放射性核素的校准实验室或机构； -面临评估由放射性核素混合物构成的表面污染任务的机构； -根据国家立法指导值或国际公约限制，控制核材料运输或材料/设备清关的机构/当局。 ISO 7503-3:2016不适用于皮肤、衣物或松散材料（如砾石）的污染。 注:在ISO 7503-1中，对α发射器、β发射器和光子发射器的表面污染进行了直接评估。ISO 7503-2规定了使用擦拭试样评估放射性表面污染的试验方法。

ISO 7503 and ISO 8769 are addressed to the people responsible for determining the radioactivity present on solid surfaces. ISO 7503-3:2016 applies to the evaluation of contamination on surfaces in terms of activity per unit area by direct and indirect methods of measurement and deals with the complex aspects of instrument calibration. ISO 7503-3:2016 is applicable to well-defined surfaces, such as those of equipment and facilities, containers of radioactive materials, sealed sources, and buildings or land. ISO 7503-3:2016 can be used for laboratory and equipment/installation control and for remediation and monitoring activities to comply with release criteria. This part of ISO 7503 also refers to the following: - calibration laboratories or institutions dealing with radionuclides with complex emission characteristics or radionuclides for which no reference calibration sources are available; - institutions confronted with the task to evaluate surface contaminations consisting of a radionuclide mixture; - institutions/authorities controlling nuclear material transports or material/equipment clearance according to national legislation guideline values or international convention limits. ISO 7503-3:2016 does not apply to contamination of the skin, clothing, or loose material, such as gravel. NOTE Direct evaluation of surface contamination from alpha-emitters, beta-emitters and photon emitters is dealt with in ISO 7503？1. The test method using wipe-test samples for the evaluation of radioactive surface contaminations is dealt with in ISO 7503？2.