Authors:
Mihály Molnár Hertelendi Laboratory of Environmental Studies, Institute of Nuclear Research of the HAS, Bem ter 18/c, Debrecen, 4026 Hungary

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László Palcsu Hertelendi Laboratory of Environmental Studies, Institute of Nuclear Research of the HAS, Bem ter 18/c, Debrecen, 4026 Hungary

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István Futó Hertelendi Laboratory of Environmental Studies, Institute of Nuclear Research of the HAS, Bem ter 18/c, Debrecen, 4026 Hungary

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Éva Svingor Hertelendi Laboratory of Environmental Studies, Institute of Nuclear Research of the HAS, Bem ter 18/c, Debrecen, 4026 Hungary

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Zoltán Major Hertelendi Laboratory of Environmental Studies, Institute of Nuclear Research of the HAS, Bem ter 18/c, Debrecen, 4026 Hungary

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Mihály Veres Isotoptech Zrt., Debrecen, Hungary

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Péter Ormai Public Agency for Radioactive Waste Management (PURAM) of Hungary, Budaörs, Hungary

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István Barnabás Public Agency for Radioactive Waste Management (PURAM) of Hungary, Budaörs, Hungary

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Abstract  

To obtain reliable estimates of the quantities and rates of the gas production in L/ILW a series of measurements was carried in the last 7 years in Hungary. The typical gas production rates were 0.05–0.2 STP litre gas/day for CO2 and CH4 generation, and less for H2. No explosive gas mixture was indicated in the L/ILW drums during the investigated storage period. Compositions of headspace gases in closed L/ILW vaults were in agreement with gas generation processes observed in L/ILW drums. The stable carbon isotope measurements show that the main source of the CO2 gas is the degradation of organic matter and indicates microbial degradation processes as the main sources of CH4. Typical tritium activity concentrations were <10 Bq/l gas in the drums and <1,000 Bq/l gas in the vaults. Typical 14C activity values of the headspace gases were <2.0 Bq/l gas in the drums and <1,000 Bq/l gas in the vaults.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)