Investigation of fl ow regime in debris bed formation behavior with nonspherical particles

Songbai Cheng; Pengfeng Gong; Shixian Wang; Jinjiang Cui; Yujia Qian; Ting Zhang; Guangyu Jiang

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자료유형: 학술저널

저자정보: Songbai Cheng Pengfeng Gong Shixian Wang Jinjiang Cui Yujia Qian Ting Zhang Guangyu Jiang

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제50권 제1호

발행연도: 2018.1

수록면: 43 - 53 (11page)

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It is important to clarify the characteristics of flow regimes underlying the debris bed formation behaviorthat might be encountered in core disruptive accidents of sodium-cooled fast reactors. Although in ourprevious publications, by applying dimensional analysis technique, an empirical model, with itsreasonability confirmed over a variety of parametric conditions, has been successfully developed topredict the regime transition and final bed geometry formed, so far this model is restricted to predictionsof debris mixtures composed of spherical particles. Focusing on this aspect, in this study a new series ofexperiments using nonspherical particles have been conducted. Based on the knowledge and data obtained,an extension scheme is suggested with the purpose of extending the base model to cover theparticle-shape influence. Through detailed analyses and given our current range of experimental conditions,it is found that, by coupling the base model with this scheme, respectable agreement betweenexperiments and model predictions for the regime transition can be achieved for both spherical andnonspherical particles. Knowledge and evidence from our work might be utilized for the futureimprovement of design of an in-vessel core catcher as well as the development and verification of sodium-cooled fast reactor severe accident analysis codes in China.

참고문헌 (30)

참고문헌 신청

A.M. Tentner / 2010 / Evaluation of Design Measures for Severe Accident Prevention and Consequence Mitigation, ANL-GENIV-128

B. Zhang / 2011 / Experimental investigation on self-leveling behavior in debris beds / Nucl. Eng. Des. 241:366~377

A.E. Waltar / 1981 / Fast Breeder Reactors / Pergamon Press

R. Nakai / 2009 / Development of severe accident evaluation technology (Level 2 PSA) for sodium-cooled fast reactors (1) Overview of evaluation methodology development / 2009 International Congress on Advances in Nuclear Power Plants (ICAPP 09)

L.X. Ren / 2012 / Severe accidents analysis in CEFR and technology gaps / International Workshop on Prevention and Mitigation of Severe Accidents in Sodiumcooled Fast Reactors

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