000136200 001__ 136200
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000136200 0247_ $$2ISSN$$a1866-1793
000136200 0247_ $$2Handle$$a2128/3740
000136200 020__ $$a978-3-89336-632-3
000136200 037__ $$aPreJuSER-136200
000136200 041__ $$aEnglish
000136200 082__ $$a500
000136200 084_0 $$aUXV - Radioactive waste disposal - interim and final
000136200 084_1 $$aUXV - Entsorgung von radioaktiven Abfällen (Zwischen- und Endlagerung)
000136200 1001_ $$aChiriki, Suresh$$b0$$eCorresponding author$$ufzj
000136200 245__ $$aDisposal strategy of proton irradiated mercury from high power spallation sources
000136200 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2010
000136200 300__ $$aXIV, 124 S.
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000136200 4900_ $$0PERI:(DE-600)2445288-9$$aSchriften des Forschungszentrums Jülich. Reihe Energie und Umwelt / Energy und Environment$$v67
000136200 502__ $$aRWTH Aachen, Diss., 2010$$bDr.$$cRWTH Aachen$$d2010
000136200 500__ $$aRecord converted from JUWEL: 18.07.2013
000136200 520__ $$aLarge spallation sources are intended to be constructed in Europe (EURISOL: nuclear
physics research facility and ESS: European Spallation Source). These facilities would
accumulate more than 20 metric tons of irradiated mercury in the target, which has to be treated as highly radioactive and chemo-toxic waste. Liquid waste cannot be tolerated in European repositories. As part of this work on safety/decommissioning of high-power spallation sources, our investigations were focused mainly to study experimentally and theoretically the solidification of liquid mercury waste (selection of an adequate solid mercury
form and of an immobilization matrix, chemical engineering process studies on
solidification/stabilization and on encapsulating in a matrix). Based on experimental results and supported by literature Hg-chalcogens (HgS, HgSe) will be more stable in repositories than amalgams. Our irradiation experimental studies on mercury waste revealed that mercury sulfide is a reasonable solid for disposal and shows larger stability in possible accidents with water ingress in a repository. Additionally immobilization of mercury in a cement matrix and polysiloxane matrix were tested. HgS formation from liquid target mercury
by a wet process is identified as a suitable formation procedure. These investigations reveal that an almost 99.9% elementary Hg conversion can be achieved and that wet process can be reasonably handled under hot cell conditions.
000136200 650_4 $$aradioactive waste disposal
000136200 650_4 $$aradioactive waste
000136200 650_4 $$amercury
000136200 650_4 $$asolidification
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000136200 9141_ $$y2013
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