Journal of Nuclear Science, Engineering and Technology (JONSAT)
In cooperation with the Iranian Nuclear Society

Assessment of Horizontal Steam Separator Two Phase Flow arameters and Performance in NPPs with Utilization of Computational Fluid Dynamic

Document Type : Research Paper

Authors

A.H. Vosoughi 1
R. Saberi 2
K. Sepanloo 2

1 School of Mechanical Engineering, Shiraz University, P.O.BOX: 72964-84334, Shiraz, Iran

2 Reactor and Nuclear Safety Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.Box: 14155-1339, Tehran – Iran

https://doi.org/10.24200/nst.2022.1385
Abstract
In this research, utilization of typical moisture separation process in conventional steam cycle power plants, for NPPs are recommended; and by applying CFD, two-phase flow of this process is simulated. Results show that with increasing of loading, the pressure drop across the separator increases, and a linear relationship between pressure drop and inlet flow kinetic energy density is established. Also, with increasing inlet width, pressure drop decreases and the efficiency increases. However, excessive increasing of input width leads to a decrease in mass flow at lateral outputs. Study on the variation of lateral outlet diameter show that variation of mentioned parameter does not affect pressure drop and efficiency significantly, but reducing of that lead to increasing lateral out let steam mass fraction. Based on the performed assessment, horizontal steam separator as a component with desirable efficiency and pressure drop, can be recognized as a suitable option for utilization in small and low power NPPs as well as propulsion systems. For validation, an analysis of two phase flow in a vertical cylinder cyclone is performed and results show good agreement with experimental data.

Highlights

1. G. Mauro, M. Sala, G. Hetsroni, Improved Italian Moisture Separator (IIMS), Nuc. Eng. & Desi., 118, 179 (1990).

 

2. J. Riznic, Steam Generator for Nuclear Power Plants, 1st ed. (Elsevier, 2017).

 

3. A. Safavi, et al, The Model of Boiling Water Flow in the VVER-1000 Steam Generator, J. of Nuclea Sci. and Tech. 65, 101 (2013) (in Persian).

 

4. V.I. Gorburov, A.Yu. Petrov, I.S. Suslov, Gravitational Separation in Horizontal PGV-1000 Steam Generators in Nuclear Power Plants with VVER Reactors, Atom. Ener., 98, 406 (2005).

 

5. J. Barbaud, et al, WWER-1000 Steam Generator Integrity, IAEA-EBP-WWER-07. (IAEA, Vienna, 1997).

 

6. M. Egorov, et al, Russian and Foreign Steam Generators for NPP Power Units with Wet Steam Turbines, E3S W. of Con.178, 01007 (2020).

 

7. M.J. Banic, et al, Assessment and Management of Ageing of Major Nuclear Power Plant Components Important to Safety: Steam Generators, IAEA-TECDOC-982. (IAEA, Vienna, 1997).

 

8. R. Rosner, S. Goldberg, J.S. Hezir, Small Modular Reactors- Key to Future Nuclear Power Generation in the U.S. (The university of Chicago & Energy policy institute at Chicago, funded by U.S.DOE, Chicago, 2011).

 

9. M.M. El-Wakil, Nuclear Energy Conversion, (In text Educational Publishers, Wisconsin, 1971).

 

10. D.J. Stelliga, J.M. Dyke, Nuclear Heated Steam Generators, Bobcock & Wilcox Canada LTD. Presentation for Canadian electrical association. (Ontario, 1970), https://canteach.candu.org.

 

11. W. Davis, Steam generators: Design and Detail, (2012).http://atomicpowerr.blogspot.com/2012/03/steam-generators-design-and-details.html?m=1.

 

12. Farchi, M.S. thesis, A Study of Mixers and Separators for Two Phase Flow in M.H.D. Energy Conversion System, Ben-Gurion University, (1990).

 

13. Z. Tian, L. Yang, Numerical Investigation on a New Type of Two-Stage Steam Separator in Pressurized Water Reactors, Ener. Proce., 142, 3962 (2017).

 

14. L. Liu, et al, Experimental Study on The Separation Performance of A Full-Scale SG Steam-Water Separator, Ann. Nuc. Ene., 141 (2020).

 

15. MAPNA Boiler Co. technical Spec., Steam Drum Internals, document no: vp-1516-121-b101-004.

 

16. M. Ghiaasiaan, Two- Phase Flow, Boiling and Condensation, (Cambridge university press, Edinburgh building, Cambridge, 2008).

 

17. Fluent 6.3 User's Guide, (Fluent Inc. 2006).

 

18. F.M. Erdal, S.A. Shirazi, O. Shoham, In: SPE Annual Technical Conference; CFD simulation of Single-Phase and two-phase flow in gas-liquid cylindrical cyclone separators, (SPE, Denver, USA, 1997).

Keywords

Steam separator
Pressure drop
Efficiency
Steam mass fraction
Steam generator
1. G. Mauro, M. Sala, G. Hetsroni, Improved Italian Moisture Separator (IIMS), Nuc. Eng. & Desi., 118, 179 (1990).
 
2. J. Riznic, Steam Generator for Nuclear Power Plants, 1st ed. (Elsevier, 2017).
 
3. A. Safavi, et al, The Model of Boiling Water Flow in the VVER-1000 Steam Generator, J. of Nuclea Sci. and Tech. 65, 101 (2013) (in Persian).
 
4. V.I. Gorburov, A.Yu. Petrov, I.S. Suslov, Gravitational Separation in Horizontal PGV-1000 Steam Generators in Nuclear Power Plants with VVER Reactors, Atom. Ener., 98, 406 (2005).
 
5. J. Barbaud, et al, WWER-1000 Steam Generator Integrity, IAEA-EBP-WWER-07. (IAEA, Vienna, 1997).
 
6. M. Egorov, et al, Russian and Foreign Steam Generators for NPP Power Units with Wet Steam Turbines, E3S W. of Con.178, 01007 (2020).
 
7. M.J. Banic, et al, Assessment and Management of Ageing of Major Nuclear Power Plant Components Important to Safety: Steam Generators, IAEA-TECDOC-982. (IAEA, Vienna, 1997).
 
8. R. Rosner, S. Goldberg, J.S. Hezir, Small Modular Reactors- Key to Future Nuclear Power Generation in the U.S. (The university of Chicago & Energy policy institute at Chicago, funded by U.S.DOE, Chicago, 2011).
 
9. M.M. El-Wakil, Nuclear Energy Conversion, (In text Educational Publishers, Wisconsin, 1971).
 
10. D.J. Stelliga, J.M. Dyke, Nuclear Heated Steam Generators, Bobcock & Wilcox Canada LTD. Presentation for Canadian electrical association. (Ontario, 1970), https://canteach.candu.org.
 
11. W. Davis, Steam generators: Design and Detail, (2012).http://atomicpowerr.blogspot.com/2012/03/steam-generators-design-and-details.html?m=1.
 
12. Farchi, M.S. thesis, A Study of Mixers and Separators for Two Phase Flow in M.H.D. Energy Conversion System, Ben-Gurion University, (1990).
 
13. Z. Tian, L. Yang, Numerical Investigation on a New Type of Two-Stage Steam Separator in Pressurized Water Reactors, Ener. Proce., 142, 3962 (2017).
 
14. L. Liu, et al, Experimental Study on The Separation Performance of A Full-Scale SG Steam-Water Separator, Ann. Nuc. Ene., 141 (2020).
 
15. MAPNA Boiler Co. technical Spec., Steam Drum Internals, document no: vp-1516-121-b101-004.
 
16. M. Ghiaasiaan, Two- Phase Flow, Boiling and Condensation, (Cambridge university press, Edinburgh building, Cambridge, 2008).
 
17. Fluent 6.3 User's Guide, (Fluent Inc. 2006).
 
18. F.M. Erdal, S.A. Shirazi, O. Shoham, In: SPE Annual Technical Conference; CFD simulation of Single-Phase and two-phase flow in gas-liquid cylindrical cyclone separators, (SPE, Denver, USA, 1997).

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