Simulation of Co-60 uptake on stainless steel and alloy 690 using the OSCAR v1.4 code integrating an advanced dissolution-precipitation model

Dacquait, Frédéric; Francescatto, Jérôme; Tevissen, E.; Genin, Jean-Baptiste; You, Dominique; Cherpin, Chloé; Broutin, François

doi:10.1016/j.nucengdes.2023.112190

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…The dissolution-precipitation model was enhanced in version 1.4, enabling OSCAR to more accurately calculate the incorporation of minor species (e.g. 60 Co) into oxides (see [12] for a detailed description of this new model and the other main ones).…”

Section: Description Of Oscar-fusionmentioning

confidence: 99%

“…The validation of the OSCAR code encompasses a wide range of conditions including water temperatures ranging from 20 • C to 350 • C, both laminar and turbulent flow regimes, reducing and oxidizing environments, as well as alkaline and acidic conditions [28]. Considering the similarities between the PHTS conditions in fusion reactors and PWRs, the OSCAR-Fusion code can benefit from the validation of the OSCAR code.…”

Section: Validation Of Oscar-fusionmentioning

confidence: 99%

“…it is limited to Co-60, whereas the elemental Co ions concentration in the coolant never reaches the Co equilibrium concentration with respect to the deposit. Figure 30 highlights this phenomenon of isotopic precipitation in unsaturated conditions of the chemical element (isotopic dissolution-precipitation model described in [12]).…”

Section: Co-60 Transfer To the Out-of-flux Regionsmentioning

confidence: 99%

“…The RSE group secured the support of CEA-Cadarache experts on ACPs and used a bespoken software developed by CEA, the OSCAR-Fusion v1.4.a code. OSCAR-Fusion [9] is a fusion adapted version of the OSCAR 5 code [10] already in use in the French Nuclear Industry [11] and validated against fission operational data [12]. The goal was to perform the most accurate estimate of the ACPs inventory, identify the key contributors to the loop contamination and propose dose reduction measures to limit the impact on the ORE. Good practices from the fission nuclear industry were also considered [13].…”

Section: Introductionmentioning

confidence: 99%

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Use of the OSCAR-Fusion V1.4.a code for a preliminary assessment of the ACP contamination within the main ITER water cooling circuit

Carloni,

Dacquait,

Polunovskiy

et al. 2024

Nucl. Fusion

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One of the main objectives of ITER is to produce 500 MW of power from a D-T plasma for several seconds. This goal presents two inherent challenges: firstly, in-vessel components will require active cooling to remove the heat coming from the fusion reaction (i.e., mainly fast neutrons and alpha particles). Secondly, the materials exposed to the neutron flux will yield activated corrosion products (ACPs) in all primary cooling circuits of ITER. From a safety point of view, ACPs are one of the contributors to the Occupational Radiological Exposure (ORE), they represent a source of radiological waste and also contribute to the source term for accidental scenarios involving the loss of primary confinement. Therefore, ACPs assessment is key to estimate radiological impact for nuclear workers and the public. ITER nuclear safety engineers adopted OSCAR-Fusion v1.4.a code to assess the ACPs inventory in the Integrated Blanket ELMs and Divertor (IBED) cooling loop. This paper describes the selection of input data, the modelling of the circuits and the operational scenarios used in OSCAR-Fusion calculations. This study also examines the outcomes of such calculations, notably in terms of ACPs inventory, emphasizing the impact on the ORE and highlighting its driving parameters. Furthermore, this paper provides recommendations for better ACPs management in the context of the ITER project and in accordance with the ALARA principle

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Section: Description Of Oscar-fusionmentioning

confidence: 99%

Section: Validation Of Oscar-fusionmentioning

confidence: 99%

Section: Co-60 Transfer To the Out-of-flux Regionsmentioning

confidence: 99%