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BS EN ISO 18589-6:2021

BS EN ISO 18589-6:2021

$102.76

Measurement of radioactivity in the environment. Soil – Gross alpha and gross beta activities. Test method using gas-flow proportional counting

Published By Publication Date Number of Pages
BSI 2021 22
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This document provides a method that allows an estimation of gross radioactivity of alpha- and beta-emitters present in soil samples. It applies, essentially, to systematic inspections based on comparative measurements or to preliminary site studies to guide the testing staff both in the choice of soil samples for measurement as a priority and in the specific analysis methods for implementation.

The gross α or β radioactivity is generally different from the sum of the effective radioactivities of the radionuclides present since, by convention, the same alpha counting efficiency is assigned for all the alpha emissions and the same beta counting efficiency is assigned for all the beta emissions.

Soil includes rock from bedrock and ore as well as construction materials and products, potery, etc. using naturally occurring radioactive materials (NORM) or those from technological processes involving Technologically Enhanced Naturally Occurring Radioactive Materials (TENORM), e.g. the mining and processing of mineral sands or phosphate fertilizer production and use.

The test methods described in this document can also be used to assess gross radioactivity of alpha- and beta-emitters in sludge, sediment, construction material and products following proper sampling procedure[2][3][4][5][7][8].

For simplification, the term “soil” used in this document covers the set of elements mentioned above.

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Symbols
5 Principle
6 Chemical reagents and equipment
6.1 Degreasing solvent.
11 7 Procedure
7.1 Preparation of sources
7.2 Calibration
7.2.1 Principle
12 7.2.2 Procedure
13 7.3 Calibration curves
7.4 Background determination
7.5 Measurement
8 Expression of results
8.1 Activities per unit mass
8.1.1 Calculation of alpha activity per unit of mass
8.1.2 Calculation of beta activity per unit of mass
14 8.2 Standard uncertainty
8.2.1 Standard uncertainty of the alpha activity per unit of mass
8.2.2 Standard uncertainty of the beta activity per unit of mass
15 8.3 Decision threshold
8.3.1 Decision threshold of the alpha activity per unit of mass
8.3.2 Decision threshold of the beta activity per unit of mass
8.4 Detection limit
8.4.1 Detection limit of the alpha activity per unit of mass
16 8.4.2 Detection limit of the beta activity per unit of mass
8.5 Confidence limits
9 Test report
18 Annex A (informative) Preparation of reference measurement standards with plutonium 239
20 Bibliography

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BS EN ISO 18589-6:2021
$102.76