Abstract
The paper presents the crud analysis of a twice-burned fuel deposit using the AREVA crud sampling method in a domestic B&W PWR. The patented AREVA sampling method allowed the separation of deposit flakes that retain all the characteristics of unperturbed crud deposition.
The twice-burned fuel assembly sampled was positioned in its second cycle of irradiation immediately against a fresh fuel assembly where the thermal-hydraulic (T/H) calculations indicated it as the first burn fuel assembly exhibiting the highest boiling for the core.
Radiochemistry data will be presented that suggest that intense boiling was present at the location of the sample collection, producing a crud accumulation during the second cycle of operation considerably larger then during the first cycle of operation.
The unperturbed 3D analysis of the deposition will be presented, allowing an in depth understanding of the processes of deposition on PWR fuel in conditions of intense localized boiling.
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References
US Patent 7,132,651 — In-Situ BWR and PWR Crud Flake Analysis Method and Tool.
M.G. Pop, et al., “Alternate BWR Fuel Deposit Characterization Method Using Microscopic Analysis of Deposit Flakes” (Paper presented at the International Water Chemistry Conference, San Francisco, California, October 2004).
US Patent 7,420,165 — Method of Determining the Power transfer of Nuclear Component with a Layer of Material Placed Upon a Heating Surface of the Component.
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© 2011 TMS (The Minerals, Metals & Materials Society)
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Pop, M.G., Lamanna, L.S., Harne, R., Riddle, J. (2011). PWR Fuel Deposit Analysis at a B&W Plant with a 24 Month Fuel Cycle. In: Busby, J.T., Ilevbare, G., Andresen, P.L. (eds) Proceedings of the 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems — Water Reactors. Springer, Cham. https://doi.org/10.1007/978-3-319-48760-1_37
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DOI: https://doi.org/10.1007/978-3-319-48760-1_37
Publisher Name: Springer, Cham
Online ISBN: 978-3-319-48760-1
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