Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

Full text (ru)

Vahid Hasani Moghaddam, I. V. Kazachkov

National Technical University of Ukraine "Kyiv Polytechnic Institute", Kyiv, Ukraine

Abstract: The given paper presents the modeling results of the bending melt jet perturbations in a coolant pool and disintegration of the jets on drops. It was shown that among the problems requiring studies for the improvement of the passive protection systems against severe accidents at NPP there are disintegration of the thin jets due to bending instability and the jet penetration length into volatile coolant pool. These problems belong to the initial stage of the severe accident in containment by the corium melt jet spreading under reactor vessel water pool. Successful solution of these problems predetermines the effectiveness of the passive protection system against severe accidents at NPP.

Keywords: jet, melt, pool, bending perturbations, model.

1. Казачков И. В. Современное состояние и некоторые проблемы моделирования тяжелых аварий на зарубежных АЭС. Ядерная и радиационная безопасность 1 (2003) 25.

2. Казачков И. В., Али Хасан Могаддам. Моделирование теплогидравлических процессов при тяжелых авариях на АЭС (Київ: НТУУ "КПИ", 2008) 172 с.

3. Али Хасан Могаддам, Казачков И. В. Удержание кориума в контейнменте в тяжелых авариях на АЭС. Енергетика: економіка, технології, екологія 2 (2007) 13.

4. Haraldsson H. O., Kazachkov I. V., Dinh T. N., Sehgal B. R. Analysis of thin jet breakup length in immiscible fluids. Abstracts. 3rd Int. Conf. Adv. in Fluid Mechanics, Montreal, Canada, 24 - 26 May, 2000 (Montreal, 2000) p. 43.

5. Kazachkov I. V., Haraldsson H. O., Yang Z. L., Sehgal B. R. Instability analysis of the thin film flow dynamics in a micro channel. Abstracts. 5th Int. Symp. Heat Transfer (Beijin, 2000) p. 112.

6. Bui V. A., Dinh T. N. A Study of Instabilities of Liquid (Melt) Jet in a Lighter Coolant Pool. Book of summaries. EUROMECH Colloquium 355 on Interfacial Instabilities: Numerical Technique. Ecole Polytechnique, Paris, France, September 11 - 13, 1996 (Paris, 1996).

7. Bui V. A., Dinh T. N., Sehgal B. R. Numerical Simulation of Surface Instability Phenomena Associated with Fuel-Coolant Interaction. Proc. 8th Int. Topical Meeting on Nuclear Reactor Thermal Hydraulics (NuReTH-8), Kyoto, Japan, September, 1997 (Kyoto, 1997).

8. Bui V. A., Dinh T. N., Sehgal B. R. Analysis of Liquid Jet Instability: Effects of Physical Properties and Phase Change. Int. Symp. on Liquid-Liquid 2-Phase Flow and Transport Phenomena, Antalya, Turkey, 1997 (Antalya, 1997).

9. Ентов В. М., Ярин А. Л. Динамика струй и пленок вязких и реологически сложных жидкостей. Итоги науки и техники 18 (Москва, 1984) 112.

10. Yarin A. L. Dynamics of Thin Liquid Jet and Film Flows (Longman Scientific & Technical, Haifa, 1993).

11. Saito M. et al. Experimental study on penetration behaviors of water jet into Freon-11 and Liquid Nitrogen. ANS Proc. 1988. Nat. Heat Transfer Conference, Houston, Texas, USA, July 24 - 27, 1988 (Houston, 1988) p. 173.