The impact of azimuthally asymmetric carbon deposition upon pellet-clad mechanical interaction in advanced gas reactor fuel

Haynes, T.A.; Podgurschi, V.; Wenman, M.R.

doi:10.1016/j.jnucmat.2018.10.047

Cited by 6 publications

(1 citation statement)

References 21 publications

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“…The AGR core consists of approximately 81,600 fuel pins (Haynes et al, 2018) that are of a ribbed design (Whillock et al, 2018) and filled with helium to avoid additional fuel oxidation (Dawson and Phillips, 2012). On the basis of 310 stainless steel with adding a smal amount of niobium "trapping" free C element in the matrix to avoid the intergranular corrosion, 20Cr25NiNb stabilized austenitic stainless steel was developed as AGR fuel cladding material.…”

Section: Compositionmentioning

confidence: 99%

Overview on performance degradation behavior of 20Cr25NiNb steel for gas cooled reactor cladding during service

et al. 2022

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In this paper, the performance degradation behavior of fuel cladding material 20Cr25NiNb for the British Advanced Gas Reactor (AGR) is reviewed in detail, which is a strong guideline for the material selection of supercritical carbon dioxide cooled reactors. The degradation behavior during in-core service mainly includes high-temperature creep, thermal aging and mechanical property degradation caused by neutron irradiation (fission gas products, helium embrittlement and irradiation sensitization) and CO2 (oxidation and carburizing). Long-term service in AGR leads to coarsening of the second phase and precipitation of harmful phases such as σ, leading to performance degradation of the cladding. A point that should require special attention is that intergranular stress corrosion cracking (IGSCC) and intergranular attack (IGA) problems occur during wet storage of spent fuel.

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Section: Compositionmentioning

confidence: 99%