Aerosol evolution in reactor containments: Role of gravitational collision efficiency

Conference · Fri Jun 01 00:00:00 EDT 1990 · Transactions of the American Nuclear Society; (USA)

OSTI ID:6124926

Buckley, R L; Loyalka, S K ^[1]

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1. Univ. of Missouri, Columbia (USA)

It has long been recognized that the evolution of high concentrations of aerosols is influenced strongly by coagulation due to settling (gravitational coagulation). It has also been known that the models currently in use for this process are based on simple estimations and lack firm theoretical/experimental basis. The problem of gravitational coagulation has, however, been studied extensively, and computer programs that can provide values for the collision cross section for several assumptions are available. The calculated results were previously fit by cubic splines, and they have been used in a limited manner to assess dependence of aerosol evolution on the cross section. The authors have found, however, that because of the nature of the cross section, the use of the splines is somewhat cumbersome. Also, the previous fits, when used in aerosol evolution programs, lead to some spurious results. Therefore, they have investigated some simpler representations of the cross section, as well as examined the evolution of typical aerosol concentration. The computed results are markedly different from those obtained by the simple formulas currently in use. The GCEFF code was used to obtain values for gravitational collision efficiency.

• OSTI ID: 6124926
• Report Number(s): CONF-900608-; CODEN: TANSA; TRN: 91-008219
• Journal Information: Transactions of the American Nuclear Society; (USA), Vol. 61; Conference: American Nuclear Society (ANS) annual meeting, Nashville, TN (USA), 10-14 Jun 1990; ISSN 0003-018X
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
AEROSOLS
FLOCCULATION
CONTAINMENT SYSTEMS
RELIABILITY
NUCLEAR POWER PLANTS
COLLISIONS
COMPUTER CODES
COMPUTERIZED SIMULATION
EFFICIENCY
G CODES
GRAVITATION
MATHEMATICAL MODELS
SPLINE FUNCTIONS
THREE-DIMENSIONAL CALCULATIONS
COLLOIDS
CONTAINMENT
DISPERSIONS
ENGINEERED SAFETY SYSTEMS
FUNCTIONS
NUCLEAR FACILITIES
POWER PLANTS
PRECIPITATION
SEPARATION PROCESSES
SIMULATION
SOLS
THERMAL POWER PLANTS
220900* - Nuclear Reactor Technology- Reactor Safety
220200 - Nuclear Reactor Technology- Components & Accessories