GENFLO

A general thermal hydraulic solution for accident simulation

Jaakko Miettinen, Anitta Hämäläinen

Research output: Book/ReportReportProfessional

Abstract

Thermal hydraulic simulation capability for accident conditions is needed as a part of several programs. Specific thermal hydraulic models are too heavy for simulation, because also the simulation of the rest of the system requires computer resources. The coupling between different physical models may be so complex that the fixed scope system codes are impossible to install for serving the special physical applications. Hence, the GENFLO (=GENeral FLOw) thermal hydraulic model has been developed at VTT for special applications. This report describes the generalised thermal hydraulic model, GENFLO, which at present has been used in three different applications. In RECRIT, the model is coupled the 2-D transient neutronics model TWODIN for calculating the recriticality accidents in the BWR plant. In FRAPTRAN application the model has been coupled with the transient fuel behaviour code FRAPTRAN for making the study of complex fuel transient possible by simulating the sub-channel thermal hydraulics as realistic as possible. In APROS-SA application the model calculates the core thermal hydraulics during the severe accident until the fuel material relocation and pool generation to the bottom of the reactor vessel is simulated.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages82
ISBN (Electronic)951-38-6083-3
Publication statusPublished - 2002
MoE publication typeD4 Published development or research report or study

Publication series

NameVTT Tiedotteita - Research Notes
PublisherVTT
No.2163
ISSN (Print)1235-0605
ISSN (Electronic)1455-0865

Fingerprint

Accidents
Hydraulics
Hydraulic models
Relocation
Hot Temperature
Computer systems

Keywords

  • nuclear power plants
  • nuclear reactors
  • accidents
  • simulation
  • GENFLO
  • heat transfer
  • thermal hydraulics
  • coolants
  • loss of coolant accidents
  • dryout

Cite this

Miettinen, J., & Hämäläinen, A. (2002). GENFLO: A general thermal hydraulic solution for accident simulation. Espoo: VTT Technical Research Centre of Finland. VTT Tiedotteita - Research Notes, No. 2163
Miettinen, Jaakko ; Hämäläinen, Anitta. / GENFLO : A general thermal hydraulic solution for accident simulation. Espoo : VTT Technical Research Centre of Finland, 2002. 82 p. (VTT Tiedotteita - Research Notes; No. 2163).
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Miettinen, J & Hämäläinen, A 2002, GENFLO: A general thermal hydraulic solution for accident simulation. VTT Tiedotteita - Research Notes, no. 2163, VTT Technical Research Centre of Finland, Espoo.

GENFLO : A general thermal hydraulic solution for accident simulation. / Miettinen, Jaakko; Hämäläinen, Anitta.

Espoo : VTT Technical Research Centre of Finland, 2002. 82 p. (VTT Tiedotteita - Research Notes; No. 2163).

Research output: Book/ReportReportProfessional

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KW - nuclear power plants

KW - nuclear reactors

KW - accidents

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KW - heat transfer

KW - thermal hydraulics

KW - coolants

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KW - dryout

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Miettinen J, Hämäläinen A. GENFLO: A general thermal hydraulic solution for accident simulation. Espoo: VTT Technical Research Centre of Finland, 2002. 82 p. (VTT Tiedotteita - Research Notes; No. 2163).