Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30848
Simulation of Loss-of-Flow Transient in a Radiant Steam Boiler with Relap5/Mod3.2

Authors: A.L.Deghal.Cheridi, A.Chaker, A.Loubar


loss of feedwater accident is one of the frequently sever accidents in steam boiler facilities. It threatens the system structural integrity and generates serious hazards and economic loses. The safety analysis of the thermal installations, based extensively on the numeric simulation. The simulation analysis using realistic computer codes like Relap5/Mod3.2 will help understand steam boiler thermal-hydraulic behavior during normal and abnormal conditions. In this study, we are interested on the evaluation of the radiant steam boiler assessment and response to loss-of-feedwater accident. Pressure, temperature and flow rate profiles are presented in various steam boiler system components. The obtained results demonstrate the importance and capability of the Relap5/Mod3.2 code in the thermal-hydraulic analysis of the steam boiler facilities.

Keywords: transient simulation, Radiant steam boiler, Relap5/Mod3.2 code system, Steady-state simulation, Loss of feedwateraccident

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1926


[1] H.Waletr, W.Linzer, "Investigation of the stability of a natural circulation in two-pass boiler", Heat and Mass Transfer, Vol.42, pp.562- 565, 2006
[2] M.Pavlov & al, "Relap5/Mod3.2 analysis of natural circulation test at Kozloduy NNP UNIT 6", Fifth International Informational Exchange Forum, Russia, October 2000.
[3] T.V.Mull & al, "Numerical Simulation Models for a Modern boiler Design, Power-Ge" International'96, Orlando, Florida, USA, December 4-9, 1996.
[4] R. C. Borges, F. D-Auria & A. C. M. Alvim, "RELAP5/MOD3.2 Post Test Simulation and Accuracy Qualification of LOBI TEST A1-93", Relap5 International Users Seminar, USA-Sept. 12-14 2000.
[5] Manuel technique d'exploitation de la Chaudière ABB ALSTOM.
[6] D.R.Tucakovic & al, "Thermal hydraulic analysis of a steam boiler with rifled evaporating tubes", Applied Thermal Engineering, Vol.27, pp.509- 519, 2007
[7] D.W.Dick & al, "Boiler Failure Mechanisms", the 61st Annual International Water Conference, Pittsburgh, PA (USA), Oct. 22-26, 2002.
[8] H.Kim, S.Choi, "A model on water level dynamics in natural circulation drum type boilers," Heat and Mass Transfer, Vol.42, pp.786-796, 2005.
[9] R. C. Borges, F. D-Auria & A. C. M. Alvim, "RELAP5/MOD3.2 Post Test Simulation and Accuracy Qualification of LOBI TEST A1-93", Relap5 International Users Seminar, USA-Sept. 12-14, 2000.
[10] The RELAP5 Development Team, RELAP5/Mod3.2 Code Manuals1998 NUREG/CR-5535 Report, Vols. 1-5, Idaho National Engineering Laboratory, March.
[11] A.L.Deghal.Cheridi, A.Chaker, "Radiant Steam Generator Simulation Using Relap5/Mod3.2 Computer Code", 11th International Conference Multiphase flow in industrial Plant, Palermo, Italy, September 7-10, 2008.
[12] A.Rahmani & al, "D-type steam boiler simulation using Relap5/Mod3.2 computer code", International Journal of Heat and Technology, vol.25, N┬░2, pp.119-126, 2006.
[13] P.Grudev, M.pavlova, "Simulation of loss-of-flow transient in a VVER- 1000 nuclear power plant with Relap5/Mod3.2", Progress in Nuclear Energy,Vol.45,N┬░.1,pp.1-10,2004