SCWR heat transfer deterioration phenomenon

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Discussion Overview

The discussion revolves around the heat transfer deterioration phenomenon in Supercritical Water-Cooled Reactors (SCWR), focusing on the thermal hydraulic aspects rather than corrosion. Participants express interest in exploring the underlying mechanisms and the lack of experimental data in this area.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants inquire about the specific nature of the heat transfer deterioration, questioning whether it relates to corrosion of heat transfer surfaces in-core or ex-core.
  • Others highlight that the phenomenon is primarily of interest from a thermal hydraulic perspective, emphasizing buoyancy forces or acceleration rather than corrosion.
  • There is a mention of limited publications and experimental data regarding this phenomenon, indicating a gap in the current literature.
  • Participants express a preference for discussing forced convection conditions, noting that the nature of the phenomenon is not well understood and that prediction and onset remain unclear.

Areas of Agreement / Disagreement

Participants generally agree on the lack of understanding surrounding the phenomenon and the need for further exploration, but there are differing views on the specific aspects to focus on, such as the role of corrosion versus thermal hydraulics.

Contextual Notes

The discussion highlights limitations in existing literature, particularly regarding experimental data and the definitions of terms related to the phenomenon. There is also an indication of unresolved questions about the conditions under which the phenomenon occurs.

Davsik
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Looking for people interested in this topic for discussions and probable scientific cooperation
 
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Please describe the problem. Is one referring to deterioration of the heat transfer surfaces due to corrosion? In-core, ex-core surfaces, or both?

I believe their is a fair amount of literature with respect to waterside corrosion of metals in superheated and supercritical coal-fired systems.
 
The phenomenon is interesting from the thermal hydraulic point of view not corrosion but due to buoyancy forces or acceleration. There is not that much publications in fact and even less data on experiments.
 
Davsik said:
The phenomenon is interesting from the thermal hydraulic point of view not corrosion but due to buoyancy forces or acceleration. There is not that much publications in fact and even less data on experiments.
Is one referring to natural circulation conditions or forced convection?
 
Forced convection is more interesting. The nature of the phenomenon sure is of top interest but as I know it's said not to be understood by now. Then the prediction and onset. Experiments and calculation methodology etc.
 

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