Conference Agenda
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Keynote 2
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ID: 1065
/ Keynote 2: 1
Invited Paper Keywords: SOURCE TERM, POOL SCRUBBING, DECONTAMINATION, SEVERE ACCIDENT Fission Products Scrubbing in Water Ponds during Severe Accidents: An Efficient Means of Attenuating Source Term CIEMAT, Spain The forensic analysis of Fukushima Daiichi have underscored the significant role played by Units 1-3 suppression pools in attenuating Source Term to the environment. However, such a role is not limited to Boiling Water Reactors (BWR), but extend to accident scenarios in Pressurized Water Reactors (PWR), like Steam Generator Tube Ruptures (SGTR). The fission products trapping in water ponds, also referred to as pool scrubbing, was profusely investigated in the 80’s of last century and, eventually, encapsulated in stand-alone codes, like SPARC90, which formulation was embedded later in MELCOR. Despite the investigation effort, which was revived by the Japanese accidents, the diversity of accident scenarios involving pool scrubbing and the extraordinary complexity of its multi-physics nature, have made it hard to build a complete and sound database. As a consequence, modelling are still open for further development, testing alternate approaches and, awareness of uncertainties affecting pool scrubbing estimates. This keynote lecture reviews the status of knowledge, pinpoints gaps necessary to be addressed and proposes a path to do it. | ||