scholarly journals Analysis of Powder Airborne Release Fractions for Vessel Ruptures

2019 ◽  
Vol 141 (3) ◽  
Author(s):  
James E. Laurinat ◽  
Steve J. Hensel
Keyword(s):  
Fluidized Bed ◽  
Pacific Northwest ◽  
Three Dimensional ◽  
Initial Pressure ◽  
Department Of Energy ◽  
Nuclear Facilities ◽  
Powder Bed ◽  
Pacific Northwest Laboratory ◽  
Vessel Volume ◽  
Low Pressures

The Department of Energy (DOE) handbook for airborne releases from nonreactor nuclear facilities bases its bounding airborne release fraction (ARF) for pressurized powders on tests conducted at Pacific Northwest Laboratory (PNL). An analysis is presented that correlates the ARF from these tests. The amount of powder that becomes airborne is correlated in terms of an adjusted airborne release fraction (AARF) equal to the product of the powder entrainment from the powder bed and the ratio of the total vessel volume to the volume occupied by the powder bed. Powder entrainments and release fractions at low pressures are correlated using a fluidized bed analogy. The analysis shows that the entrainment is enhanced by a sonic shock if the pressure prior to the rupture exceeds approximately 0.329 MPa (33 psig). A secondary, three-dimensional shock is predicted to occur at an initial pressure of approximately 2.39 MPa (332 psig). A correlation based on this analysis is used to predict the ARF for ruptures of vessels containing plutonium oxide. It is assumed that the oxide is pressurized by hydrogen that is radiolytically generated from adsorbed moisture.

scholarly journals Analysis of Powder Airborne Release Fractions for Vessel Ruptures

2015 ◽  
Author(s):  
James E. Laurinat ◽  
Steve J. Hensel
Keyword(s):  
Fluidized Bed ◽  
Pacific Northwest ◽  
Three Dimensional ◽  
Initial Pressure ◽  
Department Of Energy ◽  
Nuclear Facilities ◽  
Powder Bed ◽  
Pacific Northwest Laboratory ◽  
Vessel Volume ◽  
Low Pressures

The Department of Energy handbook for airborne releases from nonreactor nuclear facilities bases its bounding airborne release fraction (ARF) for pressurized powders on tests conducted at Pacific Northwest Laboratory (PNL). An analysis is presented that correlates the ARF from these tests. The amount of powder that becomes airborne is correlated in terms of an adjusted airborne release fraction (AARF) equal to the product of the powder entrainment from the powder bed and the ratio of the total vessel volume to the volume occupied by the powder bed. Powder entrainments and release fractions at low pressures are correlated using a fluidized bed analogy. The analysis shows that the entrainment is enhanced by a sonic shock if the pressure prior to the rupture exceeds approximately 33 psig. A secondary, three-dimensional shock is predicted to occur at an initial pressure of approximately 332 psig. A correlation based on this analysis is used to predict the ARF for ruptures of vessels containing plutonium oxide. It is assumed that the oxide is pressurized by hydrogen that is radiolytically generated from adsorbed moisture.

Three dimensional multi fluid modeling of Geldart B bubbling fluidized bed with complex inlet geometries

2017 ◽  
Vol 312 ◽  
pp. 89-102 ◽  
Author(s):  
Peter Ostermeier ◽  
Annelies Vandersickel ◽  
Stephan Gleis ◽  
Hartmut Spliethoff
Keyword(s):  
Fluidized Bed ◽  
Three Dimensional ◽  
Fluid Modeling ◽  
Bubbling Fluidized Bed

scholarly journals Three-dimensional full-loop simulation of a dual fluidized-bed biomass gasifier

2015 ◽  
Vol 160 ◽  
pp. 489-501 ◽  
Author(s):  
Hui Liu ◽  
Robert J. Cattolica ◽  
Reinhard Seiser ◽  
Chang-hsien Liao
Keyword(s):  
Fluidized Bed ◽  
Three Dimensional ◽  
Dual Fluidized Bed

Status Report—Advanced Heat Exchanger Technology for a CCGT Power Generation System

1983 ◽  
Vol 105 (2) ◽  
pp. 348-353 ◽  
Author(s):  
D. E. Wright ◽  
L. L. Tignac
Keyword(s):  
Power Generation ◽  
Heat Exchanger ◽  
Fluidized Bed ◽  
Ceramic Materials ◽  
Department Of Energy ◽  
Test Facility ◽  
Status Report ◽  
Test Results ◽  
Generation System ◽  
Power Generation System

Rocketdyne is under contract to the Department of Energy for the development of heat exchanger technology that will allow coal to be burned for power generation and cogeneration applications. This effort involves both atmospheric fluidized bed and pulverized coal combustion systems. In addition, the heat exchanger designs cover both metallic and ceramic materials for high-temperature operations. This paper reports on the laboratory and small AFB test results completed to date. It also covers the design and installation of a 6×6 ft atmospheric fluidized bed test facility being used to correlate and expand the knowledge gained from the initial tests. The paper concludes by showing the direction this technology is taking and outlining the steps to follow in subsequent programs.

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