caa a22 4500 378881892 CHVBK 20180305123434.0 cr unu---uuuuu 161128e20030301xx s 000 0 eng 10.1524/ract.91.3.153.19984 doi (NATIONALLICENCE)gruyter-10.1524/ract.91.3.153.19984 Speciation of polonium released from molten lead bismuth [Elektronische Daten] [J. Buongiorno, C. Larson, K.R. Czerwinski] The alpha-emitter 210Po is an activation product of liquid lead-bismuth, a low melting eutectic under investigation as a coolant of the next generation fast nuclear reactors. Experiments were performed to measure the gaseous polonium chemical species for assessing the radioactivity release from a Pb-Bi bath upon contact with a gas stream. The vapor pressure of lead polonide was measured over the 400-550°C temperature range and found to be in agreement with an existing correlation derived from data at higher temperatures. Also, it was experimentally confirmed that the presence of steam in the gas stream above the Pb-Bi melt substantially increases the amount of polonium released due to the formation of the volatile compound H2Po. The free-energy variation of the H2Po formation reaction was determined, permitting the calculation of the Po gas phase speciation under the experimental conditions. © 2003 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Buongiorno J. aut Larson C. aut Czerwinski K.R. aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/3/2003(2003-03-01), 153-158 0033-8230 91:3/2003<153 2003 91 ract https://doi.org/10.1524/ract.91.3.153.19984 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.91.3.153.19984 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Buongiorno J. aut NATIONALLICENCE 700 1- Larson C. aut NATIONALLICENCE 700 1- Czerwinski K.R. aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/3/2003(2003-03-01), 153-158 0033-8230 91:3/2003<153 2003 91 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter