Nucleate boiling within a fuel assembly affected by CRUD

Mokos, Athanasios; Sato, Yohei; Niceno, Bojan; Churakov, Sergey V.; Prasianakis, Nikolaos I.

doi:10.1051/epjconf/202430203003

Nucleate boiling within a fuel assembly affected by CRUD

Mokos A, Sato Y, Niceno B, Churakov SV & Prasianakis NI

Citation

Mokos, A., Sato, Y., Niceno, B., Churakov, S. V., & Prasianakis, N. I. (2024). Nucleate boiling within a fuel assembly affected by CRUD. In A. Zoia, C. M. Diop, & E. Saikali (Eds.), EPJ Web of Conferences: Vol. 302. Joint international conference on supercomputing in nuclear applications + Monte Carlo (SNA + MC 2024) (p. 03003 (7 pp.). https://doi.org/10.1051/epjconf/202430203003

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:68130

Power output of nuclear reactor and heat exchange between fuel assembly and the coolant can be severely affected by the presence of CRUD on the cladding of the fuel assembly. To understand the flow and nucleation boiling processes in the presence of CRUD, a Lattice Boltzmann model for the thermal 3D multiphase flow was developed and implemented in a high-performance multi-GPU-parallel code. The model is applied to procedurally generated CRUD-like structures and the emergence of bubbles due to superheat is investigated. The simulations predict a shorter evaporation time within chimney-like structures as well as the emergence of bubbles at the top layer of the CRUD.

Details

Publication Type

Proceedings Paper

Title

Nucleate boiling within a fuel assembly affected by CRUD

Author(s)

Mokos, Athanasios (4403 Transport Mechanisms)

Sato, Yohei (7103 Computational Fluid Dynamics)

Niceno, Bojan (7103 Computational Fluid Dynamics)

Churakov, Sergey V. (4400 Waste Management)

Prasianakis, Nikolaos I. (4403 Transport Mechanisms)

Conference Proceedings