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NKS Programme Area:NKS-B
Research Area:Emergency preparedness
Report Number:NKS-377
Report Title:Nordic In Situ gamma Intercomparison. Final Report from NKS-B NISI project (Contract: AFT/B(16)2)
Activity Acronym:NISI
Authors:T Gäfvert, J Boson, T Karhunen, G Jónsson, S Juul Krogh, J Drefvelin, P O Hetland, L Skuterud, P Reppenhagen Grim, P Smolander, K Guðnason, P Frisk, B Winther, C Andreis,
Abstract:Having the necessary skills and tools for radiological site characterization is very important in both early and late phases of an incident involving radioactive deposition over large areas. In situ gamma spectrometry is, compared to soil sampling, a rapid method to measure the deposition from fresh fallout after a nuclear accident. With an operative detector system, results can be generated in minutes after the measurements. The NKS Nordic in situ intercomparison (NISI) project provided a platform for comparing equipment, methods and results from in situ gamma spectrometric site characterizations. A one-day practical field exercise was carried out in the Jotunheimen area of Norway, which is an ideal location for this type of measurement as it contains large flat areas with significant levels of deposited Cs-137 from the Chernobyl accident in sites that are virtually undisturbed by industrial or agricultural influences. All teams were skilled and trained enough to be able to deliver the results in time, and all teams reported results that agreed well both between the countries and between the results from earlier soil sampling in 2011.
Keywords:In situ gamma spectrometry, intercomparison, emergency preparedness
Publication date:12 Dec 2016
ISBN:ISBN 978-87-7893-462-8
Number of downloads:2685
Download:pdf NKS-377.pdf
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