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Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
Y.-M. Ferng, J. H. Hsieh, C. D. Horng
Nuclear Technology | Volume 153 | Number 2 | February 2006 | Pages 197-207
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT06-A3700
Articles are hosted by Taylor and Francis Online.
A methodology that combines the Eulerian/Lagrangian droplet flow model and the droplet impingement erosion model is proposed in this paper to qualitatively predict the distributions of wall thinning locations on the shell wall of feedwater heaters (FWHs). This hybrid computational fluid dynamics model can simulate the three-dimensional distribution of steam flow and the rebound characteristics of droplets within the FWH shell. Coupled with the droplet flow characteristics, an appropriate indicator derived from the droplet impingement model is used to calculate the possible locations of severe wall thinning. The predicted wear sites on the shell wall correspond well with the plant-measured ones. Based on this good agreement, the methodology proposed herein might be used to help construct the monitoring project of wall thickness measurement for FWHs in the power plant, especially in the measuring areas on the shell wall.
