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The lumped parameter model for fuel pins

Abstract

The use of a lumped fuel-pin model in a thermal-hydraulic code is advantageous because of computational simplicity and efficiency. The model uses an averaging approach over the fuel cross section and makes some simplifying assumptions to describe the transient equations for the averaged fuel, fuel centerline and sheath temperatures. It is shown that by introducing a factor in the effective fuel conductivity, the analytical solution of the mean fuel temperature can be modified to simulate the effects of the flux depression in the heat generation rate and the variation in fuel thermal conductivity. The simplified analytical method used in the transient equation is presented. The accuracy of the lumped parameter model has been compared with the results from the finite difference method. (author). 4 refs., 2 tabs., 4 figs.
Authors:
Liu, W S [1] 
  1. Ontario Hydro, Toronto, ON (Canada)
Publication Date:
Dec 31, 1995
Product Type:
Conference
Report Number:
INIS-CA-0053; CONF-950623-
Reference Number:
SCA: 210400; PA: AIX-28:076187; EDB-97:143801; SN: 97001880593
Resource Relation:
Conference: 35. annual conference of the Canadian Nuclear Association and 16th annual conference of the Canadian Nuclear Society, Saskatoon (Canada), 4-7 Jun 1995; Other Information: PBD: 1995; Related Information: Is Part Of CNS proceedings of the 16. annual conference, volume I and II; Wight, A.L.; Loewer, R. [eds.]; PB: [2 v. ] p.
Subject:
21 NUCLEAR POWER REACTORS AND ASSOCIATED PLANTS; CANDU TYPE REACTORS; LOSS OF COOLANT; HEAT TRANSFER; MATHEMATICAL MODELS; CALCULATION METHODS; DARLINGTON-1 REACTOR; FUEL ELEMENT CLUSTERS; FUEL ELEMENTS; URANIUM DIOXIDE
OSTI ID:
546011
Research Organizations:
Canadian Nuclear Society, Toronto, ON (Canada)
Country of Origin:
Canada
Language:
English
Other Identifying Numbers:
Other: ON: DE98603788; TRN: CA9700819076187
Availability:
INIS; OSTI as DE98603788
Submitting Site:
INIS
Size:
pp. [12]
Announcement Date:

Citation Formats

Liu, W S. The lumped parameter model for fuel pins. Canada: N. p., 1995. Web.
Liu, W S. The lumped parameter model for fuel pins. Canada.
Liu, W S. 1995. "The lumped parameter model for fuel pins." Canada.
@misc{etde_546011,
title = {The lumped parameter model for fuel pins}
author = {Liu, W S}
abstractNote = {The use of a lumped fuel-pin model in a thermal-hydraulic code is advantageous because of computational simplicity and efficiency. The model uses an averaging approach over the fuel cross section and makes some simplifying assumptions to describe the transient equations for the averaged fuel, fuel centerline and sheath temperatures. It is shown that by introducing a factor in the effective fuel conductivity, the analytical solution of the mean fuel temperature can be modified to simulate the effects of the flux depression in the heat generation rate and the variation in fuel thermal conductivity. The simplified analytical method used in the transient equation is presented. The accuracy of the lumped parameter model has been compared with the results from the finite difference method. (author). 4 refs., 2 tabs., 4 figs.}
place = {Canada}
year = {1995}
month = {Dec}
}