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American National Standard N13.49

Performance and Documentation of Radiological Surveys

N13.49 CoverRadiological surveys are performed at many types of facilities for a variety of purposes. Survey objectives range from ensuring operational radiological control to demonstrating that a remediated facility may be safely released for unrestricted use. Radiological surveys comprise a set of discrete survey tasks, such as, ambient dose rate measurements, air monitoring, evaluating radiation levels from radiation producing equipment, assessing radioactive material concentrations in environmental media, and determining surface contamination levels. It is essential that these fundamental radiological survey tasks be properly performed and documented so that survey results are sufficient for their intended purposes. The data life cycle, which includes survey planning, implementation, and assessment, can be used to ensure that these survey data satisfy their stated objectives.

The data life cycle is an integral component of designing, assessing and documenting radiological surveys (ANSI/ASQC E4-1994). During the planning phase of the data life cycle, the Data Quality Objectives (DQO) Process is used to define quantitative and qualitative criteria for determining the number and type of survey measurements and samples needed for the identified survey purpose. Following the statement of survey DQOs, field and analytical procedures are selected, and appropriate quality assurance (QA) and quality control (QC) documents are developed. Survey data are then collected following the developed survey and QA/QC procedures documents. The data life cycle is completed with the Data Quality Assessment (DQA), which includes validation and verification of the data to ensure that the measurement and sampling protocols were properly followed. DQA then proceeds using the validated data set to determine if the quality of the data is sufficient to support the decision. The data life cycle, along with standardized performance of radiological survey tasks, helps to ensure that reliable procedures are implemented, appropriate survey instruments are selected and used, and qualified personnel are responsible for conducting surveys and assessing survey results. Inconsistencies and non-uniformities in documentation of radiological surveys are reduced by promoting the use of consistent units on records and consistent reporting of survey data. These records are used in the evaluation of trends, demonstrating compliance with regulations, and providing documentation of area and work site conditions.

This standard provides both specific and general guidance for facilities using radioactive material or machines producing radiation fields that will make the performance and documentation of radiological surveys more uniform and complete. The information provided is integrated into the overall survey program, in the form of procedures, for the various radiological survey types. Training of personnel responsible for radiological surveys should, in some manner, encompass the information provided.

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