TY  - BOOK
AU  - Chiriki, Suresh
TI  - Disposal strategy of proton irradiated mercury from high power spallation sources
VL  - 67
PB  - RWTH Aachen
VL  - Dr.
CY  - Jülich
M1  - PreJuSER-136200
SN  - 978-3-89336-632-3
T2  - Schriften des Forschungszentrums Jülich. Reihe Energie und Umwelt / Energy und Environment
SP  - XIV, 124 S.
PY  - 2010
N1  - Record converted from JUWEL: 18.07.2013
N1  - RWTH Aachen, Diss., 2010
AB  - Large spallation sources are intended to be constructed in Europe (EURISOL: nuclear
AB  - physics research facility and ESS: European Spallation Source). These facilities would
AB  - 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
AB  - form and of an immobilization matrix, chemical engineering process studies on
AB  - 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
AB  - 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.
LB  - PUB:(DE-HGF)3
UR  - https://juser.fz-juelich.de/record/136200
ER  -