NF M60-802-1

NF M60-802-1

July 2000
Standard Cancelled

Nuclear energy - Measurement of radioactivity in the environment-Water - Part 1 : Beta emitters activity measurement by liquid scintillation - Particular case of tritium

Le présent document décrit les conditions de mesurage de l'activité des émetteurs Bêta purs par scintillation liquide adaptées au mesurage du tritium dans les échantillons d'eau.

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Collections

National standards and national normative documents

Publication date

July 2000

Number of pages

15 p.

Reference

NF M60-802-1

ICS Codes

13.060.60   Examination of physical properties of water
17.240   Radiation measurements
27.120.01   Nuclear energy in general

Classification index

M60-802-1

Print number

1 - 16/06/2000
Sumary
Nuclear energy - Measurement of radioactivity in the environment-Water - Part 1 : Beta emitters activity measurement by liquid scintillation - Particular case of tritium

Le présent document décrit les conditions de mesurage de l'activité des émetteurs Bêta purs par scintillation liquide adaptées au mesurage du tritium dans les échantillons d'eau.
Standard replaced by (1)
NF ISO 9698
February 2011
Standard Cancelled
Water quality - Determination of tritium activity concentration - Liquid scintillation counting method

<p>ISO 9698:2010 specifies the conditions for the determination of tritium activity concentration in samples of environmental water or of tritiated water using liquid scintillation counting.</p> <p>The choice of the analytical procedure, either with or without distillation of the water sample prior to determination, depends on the aim of the measurement and the sample characteristics.</p> <p>Direct measurement of a raw water sample using liquid scintillation counting has to consider the potential presence of other beta emitter radionuclides. To avoid interference with these radionuclides when they are detected, the quantification of tritium will be performed following the sample treatment by distillation. Three distillation procedures are described.</p> <p>The method is not applicable to the analysis of organically bound tritium; its determination requires additional chemical processing (such as chemical oxidation or combustion).</p> <p>With suitable technical conditions, the detection limit may be as low as 1 Bq l<sup>-</sup><sup>1</sup>. Tritium activity concentrations below 10<sup>6</sup> Bq l<sup>-</sup><sup>1 </sup>can be determined without any sample dilution. A prior enrichment step can significantly lower the limit of detection.</p>

Table of contents
View the extract
  • Introduction
    5
  • 1 Objet et domaine d'application
    5
  • 1.1 Objet
    5
  • 1.2 Domaine d'application
    5
  • 2 Références normatives
    5
  • 3 Définitions, symboles, abréviations (1, 2, 3)
    6
  • 4 Principe
    8
  • 5 Réactifs
    8
  • 5.1 Liquide scintillant
    8
  • 5.2 Source radioactive certifiée d'eau tritiée ou une dilution de cette source
    8
  • 5.3 Agent d'affaiblissement lumineux (agent quenchant)
    9
  • 5.4 Eau de référence
    9
  • 6 Équipements
    9
  • 6.1 Matériels de laboratoire
    9
  • 6.2 Appareil de distillation
    9
  • 6.3 Ensemble de mesure à scintillation liquide
    10
  • 7 Échantillonnage
    10
  • 7.1 Prélèvement de l'échantillon
    10
  • 7.2 Conservation de l'échantillon pour analyse
    10
  • 8 Mode opératoire
    10
  • 8.1 Préparation de l'échantillon
    11
  • 8.2 Préparation des sources à mesurer
    11
  • 8.3 Analyse
    11
  • 9 Expression des résultats
    12
  • 9.1 Activité volumique du radionucléide présent dans l'échantillon
    12
  • 9.2 Seuil de décision
    13
  • 9.3 Limite de détection
    13
  • 10 Présentation des résultats
    13
  • 10.1 Activité volumique du tritium présent dans l'échantillon et son incertitude associée ou limite de détection
    14
  • Bibliographie
    15
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