Supercritical Water Reactor: Density & Temperature Impact

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SUMMARY

The discussion focuses on the impact of temperature on the density of supercritical water in the context of a Supercritical Light Water Reactor (SLWR) design using MCNPX. It is established that at a fixed pressure of 25 MPa, variations in temperature significantly affect the density of water, particularly as it approaches its critical point at 647.096 K (373.946 °C). The IAPWS Formulation 1995 is recommended for accurate thermodynamic properties of water, and relevant resources were shared to aid further understanding.

PREREQUISITES
  • Understanding of supercritical fluid properties
  • Familiarity with MCNPX simulation software
  • Knowledge of thermodynamic principles, specifically related to water
  • Awareness of the IAPWS Formulation for water properties
NEXT STEPS
  • Study the IAPWS Formulation 1995 for thermodynamic properties of water
  • Research the effects of temperature on supercritical water density
  • Explore MCNPX documentation for modeling supercritical water reactors
  • Investigate the critical point of water and its implications in reactor design
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Engineers and researchers involved in nuclear reactor design, particularly those focusing on supercritical water reactors, as well as students studying thermodynamics and fluid properties in nuclear engineering.

Aly_19f
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TL;DR
Density variation of supercritical water.
Hi, I'm working on an MCNPX design for the Supercritical Light Water Reactor, and I want to know how does the density of the water -which plays the role of the coolant and moderator- change with temperature?
I think the pressure is fixed at 25MPa, but the temperature of the water may vary, Does and How does this variation affect on its density?
 
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Aly_19f said:
Summary:: Density variation of supercritical water.

I think the pressure is fixed at 25MPa, but the temperature of the water may vary, Does and How does this variation affect on its density?
Yes, temperature and pressure affect density.

https://iopscience.iop.org/article/10.1088/1755-1315/555/1/012036/pdf

https://www.nuclear-power.com/nucle...ical-water/properties-of-supercritical-water/
https://www.nuclear-power.com/nucle.../properties-of-water/critical-point-of-water/

In water, the critical point occurs at 647.096 K (373.946 °C; 705.103 °F) and 22.064 megapascals (3,200.1 psi; 217.75 atm)
From Wikipedia article Ref 2, Wagner, W.; Pruß, A. (June 2002). "The IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use". Journal of Physical and Chemical Reference Data. 31 (2): 398. doi:10.1063/1.1461829

I would recommend obtaining the original source, and preferably the latest version of IAPWS.
http://www.iapws.org/
http://www.iapws.org/relguide/IF97-Rev.html
 
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I'm very thankful for your answer, these links will help me a lot.
Thank you.
 

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