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DOI: 10.1016/j.geothermics.2013.03.002

Impact of natural radionuclides on geothermal exploitation in the upper rhine graben

Eggeling, Lena; Genter, Albert; Kölbel, Thomas; Münch, Wolfram

The deep geothermal fluids in the Upper Rhine Graben exhibit rather similar chemical compositions. They have a high NaCl content of about 100. g/l. Circulation of geothermal fluid through the rock formations of the Upper Rhine Graben leads to chemical interactions at the liquid-solid interfaces. Some of these processes result in the transfer of natural radionuclides from solid to fluid. Due to the variation of the fluid's temperature and pressure as it passes through the surface plant during operation, solid deposits containing trapped radionuclides can accumulate in heat exchangers and filters causing health hazard, disposal cost and adverse effects on the surface installation. Radiological investigations at Bruchsal and Soultz-sous-Forêts were performed for the quantitative and qualitative determination of natural radionuclides that may occur in geothermal fluids and in the host rock with the aim to find a link between the specific activity of the source rock and the measured activity concentration in the fluid. The results of the fluid study show a distinct dominance of radium isotopes; however radium appears to be not supported ... mehr

Zugehörige Institution(en) am KIT Institut für Nukleare Entsorgung (INE)
Publikationstyp Zeitschriftenaufsatz
Jahr 2013
Sprache Englisch
Identifikator ISSN: 0375-6505, 1879-3576
KITopen ID: 1000072107
HGF-Programm 35.98.30; LK 01
Erschienen in Geothermics
Band 47
Seiten 80-88
Schlagworte Geothermal exploitation, Geothermal fluids, radionuclides, sulphate precipitations, Upper Rhine Graben
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