RAFT: a computer model for formation and transport of fission product aerosols in LWR primary system

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6816032

Im, K H; Ahluwalia, R K

A computer model RAFT (Reactor Aerosol Formation and Transport) has been developed to predict the size distribution and composition of the particles (aerosols) formed from condensation of the fission-product and control rod material vapors released in LWR accidents. The condensation calculations in RAFT are driven by the equilibrium gas phase chemistry of Cs-I-Te-Ag-In-Cd-H-O-Ar system. The formation of the particles is considered to result as the gas becomes supersaturated with Ag, In, Cd, CsI, CsOH, Te/sub 2/ or TeO/sub 2/ vapor leading to the initiation of homogeneous nucleation. The rate of change in particle size spectrum as a result of homogeneous nucleation, heterogeneous nucleation, agglomeration, convection and deposition is described by the transient population balance equation.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6816032
• Report Number(s): CONF-840701-6; ON: DE84006416
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
ACCIDENTS
AEROSOLS
COLLOIDS
COMPUTER CODES
DIFFERENTIAL EQUATIONS
DISPERSIONS
EQUATIONS
FISSION PRODUCT RELEASE
PARTICLES
R CODES
RADIOACTIVE AEROSOLS
RADIOACTIVITY TRANSPORT
REACTOR ACCIDENTS
REACTORS
SOLS
VAPOR CONDENSATION
WATER COOLED REACTORS