BS ISO 18589-5:2019 - Measurement of radioactivity in the environment. Soil. Strontium 90. Test method using proportional counting or liquid scintillation counting

BS ISO 18589-5:2019

Measurement of radioactivity in the environment. Soil. Strontium 90. Test method using proportional counting or liquid scintillation counting

Status : Current   Published : January 2020

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This document describes the principles for the measurement of the activity of 90Sr in equilibrium with 90Y and 89Sr, pure beta emitting radionuclides, in soil samples. Different chemical separation methods are presented to produce strontium and yttrium sources, the activity of which is determined using proportional counters (PC) or liquid scintillation counters (LSC). 90Sr can be obtained from the test samples when the equilibrium between 90Sr and 90Y is reached or through direct 90Y measurement. The selection of the measuring method depends on the origin of the contamination, the characteristics of the soil to be analysed, the required accuracy of measurement and the resources of the available laboratories.

These methods are used for soil monitoring following discharges, whether past or present, accidental or routine, liquid or gaseous. It also covers the monitoring of contamination caused by global nuclear fallout.

In case of recent fallout immediately following a nuclear accident, the contribution of 89Sr to the total amount of strontium activity will not be negligible. This standard provides the measurement method to determine the activity of 90Sr in presence of 89Sr.

The test methods described in this document can also be used to measure the radionuclides in sludge, sediment, construction material and products by following proper sampling procedure.

Using samples sizes of 20 g and counting times of 1 000 min, detection limits of (0,1 to 0,5) Bq·kg-1 can be achievable for 90Sr using conventional and commercially available proportional counter or liquid scintillation counter when the presence of 89Sr can be neglected. If 89Sr is present in the test sample, detection limits of (1 to 2) Bq·kg-1 can be obtained for both 90Sr and 89Sr using the same sample size, counting time and proportional counter or liquid scintillation counter as in the previous situation.




Standard NumberBS ISO 18589-5:2019
TitleMeasurement of radioactivity in the environment. Soil. Strontium 90. Test method using proportional counting or liquid scintillation counting
StatusCurrent
Publication Date03 January 2020
Normative References(Required to achieve compliance to this standard)ISO 18589-2, ISO/IEC 17025, ISO/IEC Guide 98-3, ISO 11074, ISO 80000-10, ISO 11929 (all parts), ISO 19361
Informative References(Provided for Information)NUREG-1576
ReplacesBS ISO 18589-5:2009
International RelationshipsISO 18589-5:2019
Draft Superseded By18/30325463 DC
DescriptorsSoils, Radionuclides, Radioactive wastes, Radioactivity, Radiation measurement, Strontium isotopes, Strontium, Soil testing, Soil surveys, Specimen preparation, Radioactive materials, Radioactive pollution
ICS13.080.01
17.240
Title in FrenchMesurage de la radioactivité dans l'environnement. Sol Strontium 90. Méthode d'essai par comptage proportionnel et scintillation liquide
CommitteeNCE/2
ISBN978 0 580 90605 3
PublisherBSI
FormatA4
DeliveryYes
Pages42
File Size2.101 MB
Price£214.00


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