Determination of Retained Gas in Irradiated Fuel Samples

Mogens Bjerg Mogensen

Determination of Retained Gas in Irradiated Fuel Samples

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Abstract

Full cross section samples from water reactor fuel pins are oxidized in molten NaNO₃ containing about 10% NaOH and 5% Na₂O₂. During this oxidation the fission gases Kr and Xe are released. The gas volume is measured, and the gas is analysed by mass spectrometry.

The generated amount of gas in the samples analysed is calculated from measured burn-up, from measured Xe and Kr isotope ratios and from fission yields of stable Xe and Kr isotopes with low neutron capture cross sections. From the fission gas generated and measured amount of gas retained, the gas retention and release percentage can be found.

Examples of results are reported. Retained gas plus released gas (measured by puncturing) and the calculated gas generation agreed within 6 percent.

Original language	English

Place of Publication	Roskilde, Denmark
Publisher	Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi
Number of pages	19
ISBN (Print)	87-550-0873-9
Publication status	Published - 1982

Series	Risoe-M
Number	2352
ISSN	0418-6435

Bibliographical note

Paper presented at the EEC Hot Laboratory Committee Meeting, Mol, Belgium, 10-11 June 1982

Keywords

Risø-M-2352
Fission yiled
Fission products
Fission product release
Fuel pins
Isotope ratio
Krypton
Krypton isotopes
Mass spectroscopy
Measuring methods
Molten salts
Oxidation
Post-irradiation examination
Radiation chemistry
Spent fuels
Uranium dioxide
Xenon
Xenon isotopes

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title = "Determination of Retained Gas in Irradiated Fuel Samples",

abstract = "Full cross section samples from water reactor fuel pins are oxidized in molten NaNO3 containing about 10% NaOH and 5% Na2O2. During this oxidation the fission gases Kr and Xe are released. The gas volume is measured, and the gas is analysed by mass spectrometry. The generated amount of gas in the samples analysed is calculated from measured burn-up, from measured Xe and Kr isotope ratios and from fission yields of stable Xe and Kr isotopes with low neutron capture cross sections. From the fission gas generated and measured amount of gas retained, the gas retention and release percentage can be found. Examples of results are reported. Retained gas plus released gas (measured by puncturing) and the calculated gas generation agreed within 6 percent.",

keywords = "Ris{\o}-M-2352, Fission yiled, Fission products, Fission product release, Fuel pins, Isotope ratio, Krypton, Krypton isotopes, Mass spectroscopy, Measuring methods, Molten salts, Oxidation, Post-irradiation examination, Radiation chemistry, Spent fuels, Uranium dioxide, Xenon, Xenon isotopes",

author = "Mogensen, {Mogens Bjerg}",

note = "Paper presented at the EEC Hot Laboratory Committee Meeting, Mol, Belgium, 10-11 June 1982 ",

year = "1982",

language = "English",

isbn = "87-550-0873-9",

series = "Risoe-M",

number = "2352",

publisher = "Danmarks Tekniske Universitet, Ris{\o} Nationallaboratoriet for B{\ae}redygtig Energi",

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TY - RPRT

T1 - Determination of Retained Gas in Irradiated Fuel Samples

AU - Mogensen, Mogens Bjerg

N1 - Paper presented at the EEC Hot Laboratory Committee Meeting, Mol, Belgium, 10-11 June 1982

PY - 1982

Y1 - 1982

N2 - Full cross section samples from water reactor fuel pins are oxidized in molten NaNO3 containing about 10% NaOH and 5% Na2O2. During this oxidation the fission gases Kr and Xe are released. The gas volume is measured, and the gas is analysed by mass spectrometry. The generated amount of gas in the samples analysed is calculated from measured burn-up, from measured Xe and Kr isotope ratios and from fission yields of stable Xe and Kr isotopes with low neutron capture cross sections. From the fission gas generated and measured amount of gas retained, the gas retention and release percentage can be found. Examples of results are reported. Retained gas plus released gas (measured by puncturing) and the calculated gas generation agreed within 6 percent.

AB - Full cross section samples from water reactor fuel pins are oxidized in molten NaNO3 containing about 10% NaOH and 5% Na2O2. During this oxidation the fission gases Kr and Xe are released. The gas volume is measured, and the gas is analysed by mass spectrometry. The generated amount of gas in the samples analysed is calculated from measured burn-up, from measured Xe and Kr isotope ratios and from fission yields of stable Xe and Kr isotopes with low neutron capture cross sections. From the fission gas generated and measured amount of gas retained, the gas retention and release percentage can be found. Examples of results are reported. Retained gas plus released gas (measured by puncturing) and the calculated gas generation agreed within 6 percent.

KW - Risø-M-2352

KW - Fission yiled

KW - Fission products

KW - Fission product release

KW - Fuel pins

KW - Isotope ratio

KW - Krypton

KW - Krypton isotopes

KW - Mass spectroscopy

KW - Measuring methods

KW - Molten salts

KW - Oxidation

KW - Post-irradiation examination

KW - Radiation chemistry

KW - Spent fuels

KW - Uranium dioxide

KW - Xenon

KW - Xenon isotopes

M3 - Report

SN - 87-550-0873-9

T3 - Risoe-M

BT - Determination of Retained Gas in Irradiated Fuel Samples

PB - Danmarks Tekniske Universitet, Risø Nationallaboratoriet for Bæredygtig Energi

CY - Roskilde, Denmark

ER -

Determination of Retained Gas in Irradiated Fuel Samples

Abstract

Bibliographical note

Keywords

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