Measurement of radioactivity in the environment. Air: radon-222 Accumulation method for estimating surface exhalation rate

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

10-31-2015

Publisher

British Standards Institution

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Principle of the measurement method
   for estimating surface exhalation rate
5 Equipment
6 Accumulation of radon in a container
7 Sampling
8 Detection method
9 Measurement
10 Expression of results
11 Test report
Annex A (informative) - Example of a sample results sheet
Annex B (informative) - Estimation of radon surface exhalation
        rate using a continuous measurement method
Annex C (informative) - Estimation of radon surface
        exhalation rate using a spot measurement method
Bibliography

Provides guidelines for estimating the radon-222 surface exhalation rate over a short period (a few hours), at a given place, at the interface of the medium (soil, rock, laid building material, walls, etc.) and the atmosphere.

This part of ISO 11665 gives guidelines for estimating the radon-222 surface exhalation rate over a short period (a few hours), at a given place, at the interface of the medium (soil, rock, laid building material, walls, etc.) and the atmosphere. This estimation is based on measuring the radon activity concentration emanating from the surface under investigation and accumulated in a container of a known volume for a known duration.

This method is estimative only, as it is difficult to quantify the influence of many parameters in environmental conditions. This part of ISO 11665 is particularly applicable, however, in case of an investigation, a search for sources or a comparative study of exhalation rates at the same site. This part of ISO 11665 does not cover calibration conditions for the rate estimation devices.

The measurement method described is applicable for radon exhalation rates greater than 5 mBq/m2/s.

NOTE The uncertainty relating to the estimation of the result obtained by applying this part of ISO 11665 cannot guarantee that the true flux value is included in the uncertainty domain.

Committee	NCE/2
DevelopmentNote	Renumbers and supersedes BS ISO 11665-7. 2015 version incorporates corrigendum to BS ISO 11665-7. Supersedes 10/30186202 DC. (10/2015)
DocumentType	Standard
Pages	34
PublisherName	British Standards Institution
Status	Current
Supersedes	BS ISO 11665-7 : 2012 10/30186202 DC : 0

Standards	Relationship
EN ISO 11665-7:2015	Identical
ISO 11665-7:2012	Identical

ISO/IEC 17025:2005	General requirements for the competence of testing and calibration laboratories
ISO 11665-1:2012	Measurement of radioactivity in the environment Air: radon-222 Part 1: Origins of radon and its short-lived decay products and associated measurement methods
ISO 11665-5:2012	Measurement of radioactivity in the environment Air: radon-222 Part 5: Continuous measurement method of the activity concentration
IEC 61577-1:2006	Radiation protection instrumentation - Radon and radon decay product measuring instruments - Part 1: General principles
ISO 11929:2010	Determination of the characteristic limits (decision threshold, detection limit and limits of the confidence interval) for measurements of ionizing radiation Fundamentals and application
ISO 18589-2:2015	Measurement of radioactivity in the environment — Soil — Part 2: Guidance for the selection of the sampling strategy, sampling and pre-treatment of samples
ISO 11665-6:2012	Measurement of radioactivity in the environment Air: radon-222 Part 6: Spot measurement method of the activity concentration
ISO/IEC Guide 98-3:2008	Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)

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BS EN ISO 11665-7:2015

Current

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