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- Title
Fission Gas Release from Irradiated Uranium-Plutonium Nitride Fuel.
- Authors
Grachev, A. F.; Zabud'ko, L. M.; Skupov, M. V.; Kryukov, F. N.; Teplov, V. G.; Marinenko, E. E.; Porollo, S. I.
- Abstract
The results of an investigation of fission gas release from mixed nitride fuel after irradiation to maximum burnup 7.5% h. a. in 10 experimental FA in BN-600 are reported. It is shown that gas release commences at burnup >2% h.a. and increases with increasing burnup. The burnup dependence of gas release for mixed and uranium nitride fuel coincide quite well. The fission gas beneath the fuel-rod cladding consists of three basic components: xenon, helium, and krypton. The content of the remaining gases (N2, Ar, O2, CO2) does not exceed tenths of a percent. Xenon has the highest specific release, followed by helium and krypton. Helium has the highest relative release (>40%). Xenon and krypton have almost identical release not exceeding 20% for most of the investigated fuel rods. A higher release of fission gas is associated with either an increase of the fuel temperature (>1500°C) or features of fuel microstructure.
- Subjects
FISSION gases; KRYPTON; NITRIDES; URANIUM as fuel; HELIUM
- Publication
Atomic Energy, 2021, Vol 129, Issue 2, p103
- ISSN
1063-4258
- Publication type
Article
- DOI
10.1007/s10512-021-00712-z