ASTM E1893

ASTM E1893 is the standard guide for selecting and using portable radiological survey instruments for in situ radiological assessments that support unrestricted release from further regulatory controls. It is intended to help users apply appropriate field instruments when evaluating sites, materials, or surfaces for residual radioactivity. By promoting consistent instrument selection and use, this ASTM standard supports more reliable measurements, better decision-making, and greater confidence in release determinations.

Overview of ASTM E1893

This guide focuses on the practical use of portable radiological survey instruments in the field, where measurements must be made directly at the assessment location. ASTM E1893 provides direction for choosing instruments and using them in a way that supports radiological evaluations tied to unrestricted release. The standard is useful when technical consistency is important and when survey results may be used to demonstrate that further regulatory controls are no longer needed. It emphasizes a structured approach rather than a one-size-fits-all method.

Common use cases of ASTM E1893

ASTM E1893 is commonly used during radiological surveys performed before property, equipment, or other materials are considered for release from regulatory oversight. It is relevant to field teams that rely on portable survey instruments to assess radiation levels in place and document findings for compliance or review. The guide may also support planning for survey methods, instrument selection, and field measurement practices where reliable in situ radiological assessment is required.

Benefits of using ASTM E1893

Using ASTM E1893 can improve consistency in how portable survey instruments are selected and applied, which is important when results may affect release decisions. It supports more defensible assessments by encouraging appropriate field practices and clearer alignment between instrument capability and survey objectives. For organizations involved in radiological evaluation, the standard can help reduce uncertainty, support quality control, and strengthen documentation for compliance-oriented decisions. ASTM E1893 also helps make procurement and technical review more straightforward.

• Portable radiological survey instrument selection
• In situ radiological assessment support
• Unrestricted release decision support
• Field measurement consistency
• Technical guidance for compliance-focused surveys