FLOW DATA FOR THE THERMAL DESIGN OF GAS-COOLED POROUS FUEL ELEMENTS

1978 ◽  
Author(s):  
A. H. Arastu ◽  
F. P. Berger
Keyword(s):  
Thermal Design ◽  
Flow Data ◽  
Fuel Elements

Heat Transfer Simulation of the Fuel Transport Cask for Spherical Fuel Elements in Molten Salt Reactor

2016 ◽  
Author(s):  
Yang Liu ◽  
Jun Wang
Keyword(s):  
Heat Transfer ◽  
Molten Salt ◽  
Operating Temperature ◽  
Thermal Design ◽  
Radioactive Material ◽  
Molten Salt Reactor ◽  
Temperature Ranges ◽  
Water Reactors ◽  
Fuel Elements ◽  
Safe Operating

Fuel transport is an indispensable task for nuclear power plants. For pressurized water reactors (PWR) and boiling water reactors (BWR), many research projects have been completed for designing and testing the transport casks for fresh fuel as well as spent fuel [1–3]. To ensure the safety of nuclear fuel during the transportation, many aspects should be analyzed and examined for the casks with fuel inside, such as heat transfer and temperature calculation, radiation protection, nonproliferation issues, etc. The transport cask discussed in this paper is especially for new spherical fuel elements, which should be designed in accordance with the stipulations in the GB11806 Regulations for the Safe Transport of Radioactive Material [4]. The Transport Cask for spherical fuel elements used in molten salt reactor (MSR) should be designed in accordance with the safety standards for transport of radioactive material. It is necessary to evaluate the thermal performance of the transport cask separately in normal transport condition and in accident transient. The MSR fuel sphere elements cask is in a circular cylinder shape and composed of inner container and outer shell cask. The objective of the thermal analysis of the cask under hypothetical accident conditions is to demonstrate that the cask containment boundary structural components are maintained within their safe operating temperature ranges. The heat transfer process (conduction, convection, and radiation) is simulated by ANSYS-CFX in this paper and it is demonstrated that the components of cask are maintained in safe operating temperature ranges. The calculation results are below limit temperatures, indicating that the thermal design of the cask could meet the Standard Regulations. The result is also compared with the fire test, which shows the calculation model is conservative and rational.

A Regulated-Current Network Analog for Reactor Fuel End-Cap Temperatures

1973 ◽  
Vol 2 (4) ◽  
pp. 185-193
Author(s):  
J. T. Rogers ◽  
R. S. Flemons ◽  
G. M. Barns
Keyword(s):  
Heat Source ◽  
Nuclear Reactor ◽  
Complex Geometry ◽  
Reactor Fuel ◽  
Thermal Design ◽  
Source Distribution ◽  
Nodal Points ◽  
End Caps ◽  
Heat Source Distribution ◽  
Fuel Elements

An analog of resistors and regulated-current sources has facilitated the thermal design of end caps for nuclear reactor fuel elements. The analog permits cylindrical-symmetric representation of the end caps, adjacent fuel, and sheath. With the analog, temperature distributions in various complex geometry end-cap designs can be readily determined. Non-uniform radial and axial heat source distributions, external uniform or non-uniform heat transfer coefficient distributions, and arbitrary internal contact conductance distributions between components can be treated. A feature of the analog design is the regulation of currents to the nodal points within the simulated fuel region, insuring independence of the current loadings at other nodal points. This facilitates rapid setting of the required heat source distribution. The analog has been used in the design of end caps of fuel elements for different fuel designs. Screening of proposed designs has been accomplished, and design configurations optimized. The principles of the design can be applied to analogs used for many other purposes.

Thermal Design of Underground Systems

1988 ◽  
Vol 2 (6) ◽  
pp. 303
Author(s):  
K.J.H. Hacke
Keyword(s):  
Thermal Design

Thermal Design for Infrared Sensor Pixel Operated at Atmospheric Pressure

2012 ◽  
Vol 132 (3) ◽  
pp. 53-57
Author(s):  
Yuya Shiokawa ◽  
Tatsuya Nakano ◽  
Naoki Maeda ◽  
Masafumi Kimata ◽  
Akihiro Takahata
Keyword(s):  
Atmospheric Pressure ◽  
Thermal Design ◽  
Infrared Sensor

Pressure-Flow Measurements for Selected Oral and Nasal Sound Segments Produced by Normal Adults

1992 ◽  
Vol 29 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Meri L. Andreassen ◽  
Bonnie E. Smith ◽  
Thomas W. Guyette
Keyword(s):  
Limited Information ◽  
Flow Data ◽  
Female Adult ◽  
Flow Measurements ◽  
Pressure Flow ◽  
Orifice Area ◽  
Normative Pressure ◽  
Categorization Scheme ◽  
Velopharyngeal Function ◽  
Normal Adults

Pressure-flow data are often used to provide information about the adequacy of velopharyngeal valving for speech. However, there is limited information available concerning simultaneous pressure-flow measurements for oral and nasal sound segments produced by normal speakers. This study provides normative pressure, flow, and velopharyngeal orifice area measurements for selected oral and nasal sound segments produced by 10 male and 10 female adult speakers. An aerodynamic categorization scheme of velopharyngeal function, including one typical category and three atypical categories (open, closed, and mixed) is proposed.

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