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In areas featuring air-filled mine workings the convective radon transport through the disturbed bedrock is a frequent cause of high radon concentrations in dwellings. The vertical transport distance of the radon propagation can be more than one hundred meters. The application of tracer gases that can be detected by gas chromatography at extreme low concentrations allows the clear detection of mine-originated radon in dwellings and provides knowledge on the complex processes of radon transport. The successful application of the method is demonstrated on the basis of investigations of the impact of former uranium mine sites on the radon situation in dwellings.
From W. Löbner | C. Schramm | J. Regner | K. Geringswald | F. Leichsenring | P. Schmidt
(Received 13.03.2012)
Appeared in Kerntechnik 2012/03, Page 187-190
Direct link: http://www.nuclear-engineering-journal.com/KT110266
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Application of the tracer gas technology to investigate convective radon transport processes between mine workings and houses [287 KB]
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References
1 Raatschen, W.; Grot, R. A.; Loebner, W.: Quantification of radon migration from uranium mine through the soil into buildings by use of tracer techniques, 10thWorld Clean Air Congr., Espoo Finland, May 28 –June 2, 1995.
2 Bestimmung des Luftwechsels von Gebäuden, Indikatorgasverfahren, DIN EN ISO 12569: 1998-06.
3 Heidt, F. D.: Zur Messung des Luftwechsels mit Spurengasmethoden Bauphysik 9 (1987), Heft 6, S. 272–278.
4 Thimons, E. D.; Kissell, F. N.: Tracer gas as an aid in mine ventilation analysis Bureau of Mines Report of Investigations, RI 7917, 1974.
5 Schramm, C.; Löbner, W.: Möglichkeiten der Tracergas-Technologie zum Nachweis des Einflusses offener Hohlräume des Altbergbaus auf die Radonsituation in Gebäuden am Fallbeispiel: Altbergbau in Schneeberg, Vortrag 7. Altbergbaukolloquium Freiberg, 2007.
6 Löbner, W.; Schulz, H.: Ermittlung des Quellterms durch Kombination von Messungen der Rn-Konzentration und Tracergasmessungen, Radon-Workshop des BfS, Berlin, November 2006.
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