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Title: Development and testing of a prototype modular tritium and carbon-14 gas environmental monitoring system

Increasing quantities of radioactive waste are being placed into storage facilities. Many of the waste products contain organic materials which may undergo degradation leading to the release of tritium and carbon-14 species into waste containers and potentially into the environment. Monitoring for radioactive gas releases are required for environmental regulatory compliance and for radiation protection of facility workers. Research is currently being undertaken at the National Physical Laboratory (NPL) as part of a European Metrology Research Programme (EMRP) project MetroRWM to adapt and automate existing environmental sampling techniques for tritium and carbon-14 species. An innovative modular system is being developed which will lead to the introduction of an on-site small scale system capable of gas collection, liquid scintillation sample preparation and measurement. This paper outlines the evaluation of a liquid scintillation system that has been performed to date using active solutions of spiked trapping medium of similar activity concentrations to those anticipated in a waste repository. This system will operate using pre-set conditions for quench and luminescence derived from these and subsequent trials, unlike most other counters for which corrections for these phenomena are applied post measurement. (authors)
Authors:
; ; ;  [1] ;  [2]
  1. National Physical Laboratory, Teddington (United Kingdom)
  2. Grenoble Institute of Technology - Phelma, Grenoble (France)
Publication Date:
OSTI Identifier:
22429758
Resource Type:
Journal Article
Resource Relation:
Journal Name: Fusion Science and Technology; Journal Volume: 67; Journal Issue: 3; Conference: TRITIUM 2013: 10. International Conference on Tritium Science and Technology, Nice Acropolis (France), 21-25 Oct 2013; Other Information: Country of input: France; 3 refs.
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 61 RADIATION PROTECTION AND DOSIMETRY; CARBON 14; CONCENTRATION RATIO; LIQUIDS; RADIATION MONITORING; RADIATION PROTECTION; RADIOACTIVE WASTE FACILITIES; RADIOACTIVE WASTES; SAMPLE PREPARATION; SCINTILLATIONS; STORAGE FACILITIES; TRITIUM