Two-temperature homogenized model for steady-state and transient thermal analyses of a pebble with distributed fuel particles

Cited 28 time in webofscience Cited 33 time in scopus
  • Hit : 366
  • Download : 0
In a pebble-bed type very high temperature gas-cooled reactor (VHTGR). a typical fuel pebble consists of over ten thousand five-layer TRISO particles in a graphite-matrix. The high heterogeneity in composition leads to difficulty in explicit thermal calculation of pebble fuels. Thus, a homogenization model becomes essential. Currently, a simple volumetric-average thermal conductivity approach is used. However, this approach is non-conservative and underestimates the fuel temperature. In this paper, we describe a homogenization model that is not only easy to implement but also gives a more realistic temperature distribution in a fuel pebble, providing the fuel-kernel and graphite-matrix temperatures separately. Steady-state and transient thermal analyses are performed using the homogenization model, and the point kinetics model is then coupled with the homogenization model to incorporate fuel-kernel temperature feedback. (C) 2008 Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2009-05
Language
English
Article Type
Article
Keywords

GEOMETRY

Citation

ANNALS OF NUCLEAR ENERGY, v.36, no.4, pp.448 - 457

ISSN
0306-4549
DOI
10.1016/j.anucene.2008.11.031
URI
http://hdl.handle.net/10203/174245
Appears in Collection
NE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 28 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0