NF ISO 20041-1

NF ISO 20041-1

September 2022
Standard Current

Tritium and carbon-14 activity in gaseous effluents and gas discharges of nuclear installations - Part 1 : sampling of tritium and carbon-14

This document presents the methods and provisions for sampling tritium and carbon‑14 in the gaseous effluents generated by nuclear facilities during operation and decommissioning. Specifically included are sample withdrawal location, extraction, transport flow measurement, and collection for later analysis.This document doesn’t address to real time measurements of tritium activity and carbon-14 activity in the effluent air of stacks and ducts. Information about real time measurements can be found in ISO 2889:2021, Annex H.Sample processing, analysis and calculations of tritium and carbon‑14 emissions will be addressed in future parts of ISO 20041.

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Main informations

Collections

National standards and national normative documents

Publication date

September 2022

Number of pages

52 p.

Reference

NF ISO 20041-1

ICS Codes

13.040.40   Stationary source emissions
17.240   Radiation measurements
27.120.01   Nuclear energy in general

Classification index

M62-238-1

Print number

1

International kinship

ISO 20041-1:2022
Sumary
Tritium and carbon-14 activity in gaseous effluents and gas discharges of nuclear installations - Part 1 : sampling of tritium and carbon-14

This document presents the methods and provisions for sampling tritium and carbon‑14 in the gaseous effluents generated by nuclear facilities during operation and decommissioning. Specifically included are sample withdrawal location, extraction, transport flow measurement, and collection for later analysis.

This document doesn’t address to real time measurements of tritium activity and carbon-14 activity in the effluent air of stacks and ducts. Information about real time measurements can be found in ISO 2889:2021, Annex H.

Sample processing, analysis and calculations of tritium and carbon‑14 emissions will be addressed in future parts of ISO 20041.

Replaced standards (1)
NF M60-822-1
December 2012
Standard Cancelled
Nuclear energy - Radioactivity measurement in gaseous effluents - Determination of tritium and C14 activity in gaseous effluents and gas discharge - Part 1 : sampling of tritium and C14 in gaseous effluents

Le tritium et le carbone 14 sont généralement présents dans les effluents gazeux des installations nucléaires. La norme NF ISO 2889 présente les méthodes et dispositions d'échantillonnage des substances radioactives contenues dans l'air par les conduits des installations nucléaires. Les dispositions qui y sont définies couvrent l'ensemble des formes physiques des matières présentes dans les effluents gazeux : aérosols, vapeurs et gaz. Le présent document reprend intégralement, en les adaptant, les dispositions spécifiques aux gaz et vapeur de la norme NF ISO 2889 et y inclut des méthodes normatives pour la collecte des effluents en vue de leur mesurage.

Table of contents
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Symboles
  • 5 Point de prélèvement
  • 6 Systèmes de prélèvement
  • 7 Fiche de prélèvement et fiche de suivi
  • Annexe A (informative) Exemple de fiche de prélèvement (technique du barbotage/ méthode du tamis moléculaire)
  • Annexe B (informative) Techniques de mesure du débit dans les émissaires de rejet et conduits
  • Annexe C (informative) Plage d'utilisation des dispositifs de prélèvement du tritium et du carbone 14 dans les effluents gazeux
  • Annexe D (informative) Retour d'expérience sur les valeurs de perméance des gaz dans les systèmes de prélèvement
  • Bibliographie
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