Fission product behavior

Conference · Tue Jan 01 04:00:00 EST 1991 · Transactions of the American Nuclear Society; (United States)

OSTI ID:5763627

Kress, T S ^[1]; Beahm, E C; Weber, C F ^[2]

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1. Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
2. Oak Ridge National Lab., TN (United States)

This paper reviews fission product transport and chemistry behavior in light water reactor coolant systems (RCS) and in containments under severe-accident conditions. In the RCS, the dominant aerosol processes are Brownian and turbulent agglomeration, gravitational settling, impaction, and turbulent deposition. These processes are effective in removing particulates under high-pressure accident conditions but are not effective under low-pressure conditions that are associated with higher throughput velocities and lower residence times. In the containment, the dominant natural processes are Brownian and gravitational agglomeration, gravitational settling, and diffusiophoresis. These processes provide effective removal of aerosols from the containment gas space if containment failure is either small in size (low leakage rates) or late in time. The relationships among the natural attenuation processes, the containment failure time, and the failure size have been explored.

• OSTI ID: 5763627
• Report Number(s): CONF-910603--
• Conference Information: Journal Name: Transactions of the American Nuclear Society; (United States) Journal Volume: 63
• Country of Publication: United States
• Language: English

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