Parametric Model of Debris Penetration Through Sump Strainers with Concurrent Filtration and Shedding

Technical Report · Tue Jan 01 04:00:00 EST 2013

DOI:https://doi.org/10.2172/1059404· OSTI ID:1059404

Letellier, Bruce C. ^[1]

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1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Two primary debris fates are of key interest to the risk-informed resolution analysis: (1) accumulation on the primary sump strainers with corresponding head loss, and (2) partial penetration of debris through the strainers with subsequent accumulation on fuel channel screens in the lower plenum. Accumulation on the core can impede flow, potentially causing local excessive heating and potentially limiting mixing to the point that boron precipitation can occur. Two opportunities exist for diverting debris away from the core: (1) a fraction of the ECCS recirculation flow feeds containment spray systems directly from the common header, (2) a fraction of debris-laden flow can bypass the core and proceed directly to the break without accumulating debris on the fuel assembly screen. Both of these pathways extend the time necessary to build debris levels of concern on either the strainers or the fuel assemblies.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Contributing Organization: University of Texas
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1059404
• Report Number(s): LA-UR--13-20079
• Country of Publication: United States
• Language: English

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