scholarly journals MPACT Fast Neutron Multiplicity System Design Concepts

2012 ◽  
Author(s):  
D. L. Chichester ◽  
S. A. Pozzi ◽  
J. L. Dolan ◽  
M. T. Kinlaw ◽  
A. C. Kaplan ◽  
...  
Keyword(s):  
System Design ◽  
Fast Neutron ◽  
Neutron Multiplicity ◽  
Design Concepts

Plutonium measurements with a fast-neutron multiplicity counter for nuclear safeguards applications

2014 ◽  
Vol 763 ◽  
pp. 565-574 ◽  
Author(s):  
Jennifer L. Dolan ◽  
Marek Flaska ◽  
Alexis Poitrasson-Riviere ◽  
Andreas Enqvist ◽  
Paolo Peerani ◽  
...  
Keyword(s):  
Fast Neutron ◽  
Neutron Multiplicity ◽  
Nuclear Safeguards

Evaluation of Fuel Preparation Systems for Lean Premixing-Prevaporizing Combustors

1986 ◽  
Vol 108 (2) ◽  
pp. 391-395
Author(s):  
W. J. Dodds ◽  
E. E. Ekstedt
Keyword(s):  
System Design ◽  
Large Scale ◽  
Fuel Injection ◽  
Operating Conditions ◽  
Turbine Engine ◽  
Fuel Injectors ◽  
Design Concepts ◽  
Mixture Preparation ◽  
Design Variables ◽  
System Length

A series of tests was conducted to provide data for the design of premixing-prevaporizing fuel-air mixture preparation systems for aircraft gas turbine engine combustors. Fifteen configurations of four different fuel-air mixture preparation system design concepts were evaluated to determine fuel-air mixture uniformity at the system exit over a range of conditions representative of cruise operation for a modern commercial turbofan engine. Operating conditions, including pressure, temperature, fuel-air ratio, and velocity had no clear effect on mixture uniformity in systems which used low-pressure fuel injectors. However, performance of systems using pressure atomizing fuel nozzles and large-scale mixing devices was shown to be sensitive to operating conditions. Variations in system design variables were also evaluated and correlated. Mixture uniformity improved with increased system length, pressure drop, and number of fuel injection points per unit area. A premixing system compatible with the combustor envelope of a typical combustion system and capable of providing mixture nonuniformity (standard deviation/mean) below 15% over a typical range of cruise operating conditions was demonstrated.

Starprobe thermal shield system design concepts

1982 ◽  
Author(s):  
C. MAAG ◽  
J. MILLARD ◽  
R. MIYAKE
Keyword(s):  
System Design ◽  
Thermal Shield ◽  
Design Concepts

Application research on neutron-gamma discrimination based on BC501A liquid scintillator

Kerntechnik ◽  
2021 ◽  
Vol 86 (6) ◽  
pp. 437-444
Author(s):  
J. Luo ◽  
S. Hou
Keyword(s):  
Fast Neutron ◽  
Figure Of Merit ◽  
Gamma Ray ◽  
Liquid Scintillator ◽  
Comparison Method ◽  
Mean Value ◽  
Neutron Multiplicity ◽  
Nuclear Disarmament ◽  
Zero Crossing ◽  
Non Destructive

Abstract Liquid organic scintillators are widely used in non-destructive analysis, which plays an important role in nuclear disarmament verification. This paper focused on studying the neutron-gamma discrimination technology in the fast neutron multiplicity measuring counter based on BC501A liquid scintillation detector. First, the charge comparison method, the zero-crossing time method and the rise time method were compared via the Geant4 and Matlab algorithm, and the result shows that charge comparison has the highest Figure of Merit. Then, a neutron-gamma discrimination system based on the six-probe fast neutron multiplicity counter was built and tested with a conclusion that the mean value of Figure of merit is 1.08, which verify the satisfactory neutron-gamma discriminating capability of the system. Finally, for the uranium samples, the mass are detected by fast neutron multiplicity counter, and the enrichment are measured by the characteristic gamma-ray signals using the system. The experimental results are in good agreement with the actual data.

Autonomous audio heater car: A comprehensive project-based analog design experience

2018 ◽  
Vol 55 (2) ◽  
pp. 155-167 ◽  
Author(s):  
Richard L LeBoeuf ◽  
Jorge T Gómez
Keyword(s):  
System Design ◽  
System Integration ◽  
Analog Design ◽  
Guided Discovery ◽  
Team Members ◽  
Design Concepts ◽  
Overall Design ◽  
The Individual ◽  
In Transit ◽  
Design Experience

This paper presents a methodology for teaching analog design concepts in the context of a single conceptual design and competition. The autonomous audio heater car is a comprehensive project-based analog design experience within a conceive, design, implement, operate framework. The students participate in the overall design process with guided discovery, rather than merely conducting scripted laboratory exercises. Students develop an understanding of the analog design required for each subsystem through weekly individual pre-laboratory and laboratory exercises. The car is guided to a beacon by light and/or audio tone. In transit, the car heats water to a temperature corresponding to the beacon tone and emits a tone corresponding to the instantaneous water temperature. The project culminates with team-based system integration and a competition. The individual work serves to cross-train all of the team members such that they all contribute effectively in the teams. The project motivated students because it provided a framework for laboratory topics, which would typically be considered without the broader context of a system design introduced at the beginning of the course.

Space mail recovery system design concepts

1993 ◽  
Author(s):  
MICHAEL KOSTELEZKY ◽  
KARL-FRIEDRICH DOHERR ◽  
ULRICH SCHOETTLE
Keyword(s):  
System Design ◽  
Design Concepts ◽  
Recovery System
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