Validation of RELAP5/MOD3.2 Code for Flashing-Induced Instabilities in a Single Channel - World Journal of Nuclear Science and Technology

WJNST > Vol.5 No.1, January 2015

World Journal of Nuclear Science and Technology

Volume 5, Issue 1 (January 2015)

ISSN Print: 2161-6795 ISSN Online: 2161-6809

Google-based Impact Factor: 0.38 Citations h5-index & Ranking

Validation of RELAP5/MOD3.2 Code for Flashing-Induced Instabilities in a Single Channel ()

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DOI: 10.4236/wjnst.2015.51002 3,616 Downloads 4,518 Views Citations

Author(s)

Hamed Atajafari^1*, Mohammadreza Nematollahi², Mehdi Hashemi-Tilehnoee³, Nasim Rafiee⁴

Affiliation(s)

¹Engineering and Manufacturing Division, Iran Sanaat Industrial Group, Shiraz, Iran.
²School of Mechanical Engineering, Shiraz University, Shiraz, Iran.
³Department of Engineering, Aliabad Katoul Branch, Islamic Azad University, Aliabad Katoul, Iran.
⁴Department of Engineering, Bushehr Branch, Islamic Azad University, Bushehr, Iran.

ABSTRACT

This paper reports on the modeling and simulation of flashing-induced instabilities in naturalcirculation systems, with special emphasis on simplified boiling water reactors (SBWRs). In this work, flashing-induced oscillations have been studied by using an experimental test facility (SIRIUS-N) and RELAP5/MOD3.2 thermal hydraulic code. The behavior of the test facility is investigated for different values of core inlet temperature value. The results of the simulations have been compared qualitatively and quantitatively with experiments. In general, deviations are found between the numerical and experimental results, in spite of the close similarity between the SIRIUS-N facility and the definition of the system in the RELAP code. This result indicates that predictions regarding experimental facility, based on modeled system, should be carefully considered.

KEYWORDS

SBWR, Flashing-Induced Instabilities, Start-Up Condition, RELAP5/MOD3.2, Experimental Test Facility

Share and Cite:

Atajafari, H. , Nematollahi, M. , Hashemi-Tilehnoee, M. and Rafiee, N. (2015) Validation of RELAP5/MOD3.2 Code for Flashing-Induced Instabilities in a Single Channel. World Journal of Nuclear Science and Technology, 5, 6-17. doi: 10.4236/wjnst.2015.51002.

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