Radionuclide transport in a long-term operation supercritical CO2-cooled direct-cycle small nuclear reactor

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 30
  • Download : 0
In recent years, to overcome the challenges of nuclear power plants due to their large scale, numerous types of small modular reactors are being designed worldwide. Small modular reactors are required to have a capability to operate in environmentally challenging regions with long refueling time. Supercritical CO2 (S-CO2)-cooled direct-cycle reactor is one of the candidates that can meet these requirements. In order to evaluate if the design achieves this goal, transport of generated radionuclides from the long-term operation has to be evaluated in order to estimate the radioactivity accumulation in the system. However, existing radionuclide transport evaluation method does not reflect the characteristics of supercritical fluids properly. In this paper, the fission product plate-out behavior of Korea Advanced Institute of Science and Technology Micro Modular Reactor (KAIST-MMR), a 10-MWe class S-CO2-cooled fast reactor with direct S-CO2 power conversion system, is studied. The evaluation methodology was developed via integrating suitable models while considering the shape of the nuclear fuel, component geometries, characteristics of a working fluid in supercritical state, and the fast reactor design. As a result of the analysis, the degree of plate-out of KAIST-MMR is not expected to have serious radioactivity accumulation within the components. Most of the sorption occurred at the turbine and recuperator hot-side inlet region. In particular, the dose rate of the turbine was quite low, because the size of the turbine is very small.
Publisher
WILEY
Issue Date
2020-03
Language
English
Article Type
Article
Citation

INTERNATIONAL JOURNAL OF ENERGY RESEARCH, v.44, no.5, pp.3905 - 3921

ISSN
0363-907X
DOI
10.1002/er.5189
URI
http://hdl.handle.net/10203/276752
Appears in Collection
NE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0