Detailed analyses of specific phenomena in core disruptive accidents of sodium-cooled fast reactors by the compass code

Koji Morita, Shuai Zhang, Tatsumi Arima, Sciichi Koshizuka, Yoshiharu Tobita, Hidemasa Yamano, Takahiro Ito, Noriyuki Shirakawa, Fusao Inoue, Hiroaki Yugo, Masanori Naitoh, Hidetoshi Okada, Yuichi Yamamoto, Masashi Himi, Etsujo Hirano, Sensuke Shimizu, Masaya Oue

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A five-year research project has been initiated in 2005 to develop a code based on the MPS (Moving Particle Semi-implicit) method for detailed analysis of specific phenomena in core disruptive accidents (CDAs) of sodium-cooled fast reactors (SFRs). The code is named COMPASS (Computer Code with Moving Particle Semi-implicit for Reactor Safety Analysis). The specific phenomena include 1) fuel pin failure and disruption, 2) molten pool boiling, 3) melt freezing and blockage formation, 4) duct wall failure, 5) low-energy disruptive core motion, 6) debris-bed coolability, and 7) metal-fuel pin failure. Validation study of COMPASS is progressing for these key phenomena. In this paper, recent COMPASS results of detailed analyses for the several specific phenomena are summarized. Simulations of GEYSER and THEFIS experiments were performed for dispersion and freezing behaviors of molten materials in narrow flow channels. In particular, the latter experiment using melt-solid mixture is also related to fundamental behavior of low energy disruptive core. CABRI-TPA2 experiment was simulated for boiling behavior of molten core pool. Expected mechanism of heat transfer between molten fuel and steel mixture was reproduced by the simulation. Analyses of structural dynamics using elastoplastic mechanics and failure criteria were performed for SCARABEE BE+3 and CABRI E7 experiments. These two analyses are especially focused on thermal and mechanical failure of steel duct wall and fuel pin, respectively. The present results demonstrate COMPASS will be useful to understand and clarify the specific phenomena of CDAs in SFRs in details.

Original languageEnglish
Title of host publication18th International Conference on Nuclear Engineering, ICONE18
Pages855-863
Number of pages9
EditionPARTS A AND B
DOIs
Publication statusPublished - Dec 1 2010
Event18th International Conference on Nuclear Engineering, ICONE18 - Xi'an, China
Duration: May 17 2010May 21 2010

Publication series

NameInternational Conference on Nuclear Engineering, Proceedings, ICONE
NumberPARTS A AND B
Volume4

Other

Other18th International Conference on Nuclear Engineering, ICONE18
CountryChina
CityXi'an
Period5/17/105/21/10

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering

Cite this

Morita, K., Zhang, S., Arima, T., Koshizuka, S., Tobita, Y., Yamano, H., ... Oue, M. (2010). Detailed analyses of specific phenomena in core disruptive accidents of sodium-cooled fast reactors by the compass code. In 18th International Conference on Nuclear Engineering, ICONE18 (PARTS A AND B ed., pp. 855-863). (International Conference on Nuclear Engineering, Proceedings, ICONE; Vol. 4, No. PARTS A AND B). https://doi.org/10.1115/ICONE18-29886