The development of a mechanistic code on fission product behavior in the polycrystalline UO2 fuel

Dobrov, Boris V.; Khoruzhii, O. V.; Kourtchatov, S.Yu.; Likhanskiǐ, V. V.

doi:10.1016/s0029-5493(99)00203-4

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Gas Resolution Models1

Fuel Oxidation Modelling In Air1

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Cited by 6 publications

(2 citation statements)

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“…A recent series of reviews [48,49] has considered the resolution of fission gas from intra-and inter-granular bubbles [49] and the impact these models have upon the total levels of gas resolution. We summarise here the relevant literature concentrating on the overall physical size and shape of fission gas bubbles.…”

Section: Gas Resolution Modelsmentioning

confidence: 99%

Predicting the probability for fission gas resolution into uranium dioxide

Parfitt

Grimes

2009

Journal of Nuclear Materials

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Section: Gas Resolution Modelsmentioning

confidence: 99%

Predicting the probability for fission gas resolution into uranium dioxide

Parfitt

Grimes

2009

Journal of Nuclear Materials

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“…In case of fuel oxidation under steam/hydrogen mixtures, it has been shown that the key step is the oxygen exchange at the gas/solid interface [15,16]. However, to make the calculations faster, the fuel oxidation is often calculated in accidents codes by means of a basic model that only takes into account the oxygen exchange at the gas/solid interface [17].…”

Section: Fuel Oxidation Modelling In Airmentioning

confidence: 99%

Ruthenium release from fuel in accident conditions

Brillant¹,

Marchetto

Plumecocq

2010

Radiochimica Acta

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During a hypothetical nuclear power plant accident, fission products may be released from the fuel matrix and then reach the containment building and the environment. Ruthenium is a very hazardous fission product that can be highly and rapidly released in some accident scenarios. The impact of the atmosphere redox properties, temperature, and fuel burn-up on the ruthenium release is discussed. In order to improve the evaluation of the radiological impact by accident codes, a model of the ruthenium release from fuel is proposed using thermodynamic equilibrium calculations. In addition, a model of fuel oxidation under air is described. Finally, these models have been integrated in the ASTEC accident code and validation calculations have been performed on several experimental tests.

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