Modeling of hydrogen behavior in spent fuel claddings during dry storage

Kolesnik, M.; Aliev, T.; Likhanskiǐ, V. V.

doi:10.1016/j.jnucmat.2018.06.012

Cited by 11 publications

(3 citation statements)

References 16 publications

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“…A very detailed hydrogen behavior model has been developed by Kolesnik et al [87] . It accounts for many effects affecting reorientation of hydrides.…”

Section: Hydride Reorientationmentioning

confidence: 99%

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Spent nuclear fuel in dry storage conditions – current trends in fuel performance modeling

Konarski

Cozzo

Khvostov

et al. 2021

Journal of Nuclear Materials

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The role of dry storage in spent nuclear fuel management becomes more and more important. Originally intended to serve as a temporary solution for a few decades until final disposal, now dry storage period is to be extended to 100 years and beyond. It has to be proven for licensing that the fuel rod integrity during dry storage is ensured. Since it is difficult to provide experimental support, the licensing process has to rely largely on numerical simulations. This paper reviews the literature associated with the modeling of spent nuclear fuel under dry storage conditions. The main phenomena threatening the fuel rod integrity and the numerical models representing them are described here. Moreover, the most recent or currently ongoing experimental efforts that could support the modeling of nuclear fuel in dry storage in the future are discussed. Finally, this paper reviews approaches to dry storage modeling chosen by different countries. In general, these approaches are similar and can be described as a calculation chain consisting of neutronics-thermo-hydraulics-fuel performance computations where sensitivity and uncertainty studies are crucial elements.

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“…A very detailed hydrogen behavior model has been developed by Kolesnik et al [87] . It accounts for many effects affecting reorientation of hydrides.…”

Section: Hydride Reorientationmentioning

confidence: 99%

“…The code RTOP-DS has several models developed to study dry storage. Among them is the creep model developed by Aliev et al [110] (see Section 4.1 ) and a sophisticated hydrogen behavior model proposed by Kolesnik et al [87] (see Section 3.5.3 ).…”

Section: Russiamentioning

confidence: 99%

Spent nuclear fuel in dry storage conditions – current trends in fuel performance modeling

Konarski

Cozzo

Khvostov

et al. 2021

Journal of Nuclear Materials

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“…[ 4 ] There are some possible internal sources of hydrogen in the canister in addition to the metallurgical hydrogen originating from manufacturing: residual water from the spent nuclear fuel assemblies, the amount of which left in each canister in accordance with the design case must be <600 g, [ 1,3 ] and hydrogen produced by (n, p) reactions and hydrides formed in the zirconium–alloy fuel assemblies. [ 5 ] The effects of hydrogen on all canister materials, including DCI, have to be known and taken into account in the safety analysis of spent nuclear fuel disposal.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen embrittlement of nodular cast iron

Sahiluoma

Yagodzinskyy

Forsström

et al. 2020

Materials & Corrosion

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Ferritic nodular cast iron, intended for use as the material for inserts of canisters for long‐term geological disposal of spent nuclear fuel, was studied for hydrogen sensitivity. In the canisters, the insert provides the mechanical strength against external loads. Hydrogen was charged from 0.1 N H2SO4 solution in free‐corrosion tests and under controlled cathodic potential. Hydrogen uptake and trapping were then measured using thermal desorption spectroscopy. The hydrogen desorption rate after hydrogen charging manifests two distinct peaks. Plastic deformation during hydrogen charging increases the hydrogen uptake considerably. Hydrogen reduces the elongation to fracture and time to fracture in slow strain rate testing and constant load testing (CLT), respectively. Especially, the strain rate in CLT is dramatically increased. The appearance of hydrogen‐induced cracking in the ferrite phase changes from ductile dimple fracture to brittle cleavage fracture due to hydrogen charging, which initiates from the interphases of the graphite nodules. The results are discussed in terms of the role of hydrogen and the graphite nodules in hydrogen embrittlement of ductile cast iron.

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