Debris Impact on Emergency Coolant Recirculation Workshop Proceedings, Albuquerque NM, USA, 25-27 February 2004: Effects of Debris Generated by Chemical Reactions on Head Loss Through Emergency Core Cooling System Strainers

Author： OECD Nuclear Energy Agency  

Publisher： OECD Publishing

ISSN： 1608-0262

Source： SourceOECD Nuclear Energy, Vol.2004, Iss.15, 2004-10, pp. : 597-630

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Abstract

The effect of debris generated during a loss of coolant accident (LOCA) on the emergency core cooling system (ECCS) strainers has been studied via numerous avenues over the last several years. The research described in this manuscript examines the generation and effect of secondary materials - not debris generated in the LOCA itself, but materials created by chemical reactions between exposed surfaces/debris and cooling system water. The secondary materials studied in the research were corrosion products from exposed metallic surfaces and paint chips that may precipitate out of solution, with a focus on the corrosion products of aluminium, iron, and zinc. The processes of corrosion and leaching of metals with subsequent precipitation is important because: (1) the surface area of exposed metal inside containment represents a large potential source term, even for slow chemical reactions; (2) the chemical composition of the cooling system water (boric acid, lithium, etc.) may affect ...

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