scholarly journals Initial Neutronics Analyses for HEU to LEU Fuel Conversion of the Transient Reactor Test Facility (TREAT) at the Idaho National Laboratory

2013 ◽  
Author(s):  
D. Kontogeorgakos ◽  
K. Derstine ◽  
A. Wright ◽  
T. Bauer ◽  
J. Stevens
Keyword(s):  
National Laboratory ◽  
Test Facility ◽  
Fuel Conversion ◽  
Idaho National Laboratory ◽  
Reactor Test

Representativity Analysis Applied to TREAT Water Loop LOCA Experiment Design

2020 ◽  
Author(s):  
Aaron S. Epiney ◽  
Nicolas Woolstenhulme
Keyword(s):  
Modeling And Simulation ◽  
National Laboratory ◽  
Water Environment ◽  
Experiment Design ◽  
Design Parameters ◽  
3D Analysis ◽  
Full System ◽  
Full Size ◽  
Idaho National Laboratory ◽  
Reactor Test

Abstract The Transient Reactor Test (TREAT) Facility at Idaho National Laboratory (INL) started testing new fuels and reactor technologies once again in 2018 and new experiments and tests are currently being designed like for example the water loop “TREAT Water Environment Recirculating Loop” (TWERL). During the design of such experiments, the designer must assess how close the experiment reproduces the physics (and other important phenomena) happening during a transient of interest compared to the full-size reactor the experiment attempts representing. Traditionally, to assess this “representativity” of the experiment, scaling theory involving expert judgment is needed. This paper presents a step towards a systematic modeling and simulation (M&S) informed methodology for experiment design. The new methodology compares a model of the full system and a model of the mock-up facility that are subject to the same perturbations. In this way, the “overlap” of the perturbed experiment and full-size facility model outputs can be analyzed and the “representativity” of the experiment determined. The paper presents a RELAP5-3D analysis, where TWERL LOCA calculations are compared to prototypic PWR LOCA calculations with respect to representativity. To inform the design of the TWERL experiments, i.e. to find the most “representative” configuration for the TWERL loop, different design parameters for TWERL have been optimized in the study.

Optimization Study for Uncertainty Reduction of In-Pile CHF Experiments in TREAT

2020 ◽  
Author(s):  
Seokbin Seo ◽  
Nicholas R. Brown ◽  
Robert J. Armstrong ◽  
Charles P. Folsom ◽  
Colby B. Jensen
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Energy Deposition ◽  
Nuclear Reactor ◽  
National Laboratory ◽  
Nucleate Boiling ◽  
Surface Heat ◽  
Idaho National Laboratory ◽  
Optimization Study ◽  
Reactor Test

Abstract Reactivity-initiated accidents (RIAs) are one of the postulated incidents that can threaten the operational safety of a nuclear reactor. During a RIA, a rapid increase of energy deposition in the fuel can lead to a departure from nucleate boiling (DNB) occurrence which refers to the point where a drastic decrease in heat transfer capabilities occurs and the surface heat flux exceeds the critical heat flux (CHF). Aiming to understand the fundamentals beneath CHF and to predict it, the Transient Reactor Test (TREAT) facility at the Idaho National Laboratory (INL) is a unique facility that will be used to experimentally investigate the transient CHF under in-pile pool boiling condition. As part of a comprehensive effort to utilize TREAT for this project, this study analyzed the expected uncertainties in the experimental data by identifying the key inputs for the uncertainty in the temperature measurements and quantifying their priorities. The sensitivities of key inputs from neutronics modeling, the clad-to-coolant heat transfer, thermophysical properties of the tube, and coolant conditions were quantified using Sobol sensitivity analysis methods, and the significant effect of the occurrence of the CHF on the sensitivity of input was found.

scholarly journals Test Results From the Idaho National Laboratory 15kW High Temperature Electrolysis Test Facility

2009 ◽  
Author(s):  
Carl M. Stoots ◽  
Keith G. Condie ◽  
James E. O’Brien ◽  
J. Stephen Herring ◽  
Joseph J. Hartvigsen
Keyword(s):  
High Temperature ◽  
National Laboratory ◽  
The United States ◽  
Solid Oxide ◽  
Test Facility ◽  
United States Department ◽  
Idaho National Laboratory ◽  
Production Of Hydrogen ◽  
Heat Recuperation ◽  
High Temperature Electrolysis

A 15 kW high temperature electrolysis test facility has been developed at the Idaho National Laboratory under the United States Department of Energy Nuclear Hydrogen Initiative. This facility is intended to study the technology readiness of using high temperature solid oxide cells for large scale nuclear powered hydrogen production. It is designed to address larger-scale issues such as thermal management (feedstock heating, high temperature gas handling, heat recuperation), multiple-stack hot zone design, multiple-stack electrical configurations, etc. Heat recuperation and hydrogen recycle are incorporated into the design. The facility was operated for 1080 hours and successfully demonstrated the largest scale high temperature solid-oxide-based production of hydrogen to date.

scholarly journals Recent Progress at the Idaho National Laboratory in High Temperature Electrolysis for Hydrogen and Syngas Production

2008 ◽  
Author(s):  
C. Stoots ◽  
J. O’Brien ◽  
J. Herring ◽  
J. Hartvigsen
Keyword(s):  
Salt Lake ◽  
National Laboratory ◽  
Salt Lake City ◽  
H2 Production ◽  
Test Facility ◽  
Operating Voltage ◽  
Idaho National Laboratory ◽  
Syngas Production ◽  
Lake City ◽  
Stack Testing

This paper presents the most recent results of experiments conducted at the Idaho National Laboratory (INL) studying electrolysis of steam and coelectrolysis of steam / carbon dioxide in solid-oxide electrolysis stacks. Single button cell tests as well as multi-cell stack testing have been conducted. Multi-cell stack testing used 10 × 10 cm cells (8 × 8 cm active area) supplied by Ceramatec, Inc (Salt Lake City, Utah, USA) and ranged from 10 cell short stacks to 240 cell modules. Tests were conducted either in a bench-scale test apparatus or in a newly developed 5 kW Integrated Laboratory Scale (ILS) test facility. Gas composition, operating voltage, and operating temperature were varied during testing. The tests were heavily instrumented, and outlet gas compositions were monitored with a gas chromatograph. The ILS facility is currently being expanded to 15 kW testing capacity (H2 production rate based upon lower heating value).

scholarly journals Idaho National Laboratory Experimental Research in High Temperature Electrolysis for Hydrogen and Syngas Production

2008 ◽  
Author(s):  
Carl M. Stoots ◽  
James E. O’Brien ◽  
J. Stephen Herring ◽  
Keith G. Condie ◽  
Joseph J. Hartvigsen
Keyword(s):  
High Temperature ◽  
Large Scale ◽  
Salt Lake ◽  
National Laboratory ◽  
Salt Lake City ◽  
Test Facility ◽  
Operating Voltage ◽  
Idaho National Laboratory ◽  
Syngas Production ◽  
Stack Testing

The Idaho National Laboratory (Idaho Falls, Idaho, USA), in collaboration with Ceramatec, Inc. (Salt Lake City, Utah, USA), is actively researching the application of solid oxide fuel cell technology as electrolyzers for large scale hydrogen and syngas production. This technology relies upon electricity and high temperature heat to chemically reduce a steam or steam / CO2 feedstock. Single button cell tests, multi-cell stack, as well as multi-stack testing has been conducted. Stack testing used 10 × 10 cm cells (8 × 8 cm active area) supplied by Ceramatec and ranged from 10 cell short stacks to 240 cell modules. Tests were conducted either in a bench-scale test apparatus or in a newly developed 5 kW Integrated Laboratory Scale (ILS) test facility. Gas composition, operating voltage, and operating temperature were varied during testing. The tests were heavily instrumented, and outlet gas compositions were monitored with a gas chromatograph. The ILS facility is currently being expanded to ∼15 kW testing capacity (H2 production rate based upon lower heating value).

Lifetimes of 214Po and 212Po measured with Counting Test Facility at Gran Sasso National Laboratory

2014 ◽  
Vol 138 ◽  
pp. 444-446
Author(s):  
L. Miramonti ◽  
G. Bellini ◽  
J. Benziger ◽  
D. Bick ◽  
G. Bonfini ◽  
...  
Keyword(s):  
National Laboratory ◽  
Test Facility

Development of Coal Partial Gasification and Combustion System

2004 ◽  
Author(s):  
Yaoxin Liu ◽  
Libin Yang ◽  
Mengxiang Fang ◽  
Guanyi Chen ◽  
Zhongyang Luo ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Pilot Plant ◽  
Sulfur Removal ◽  
Test Facility ◽  
Molar Ratio ◽  
Fuel Conversion ◽  
Heating Value ◽  
Pilot Plant Test ◽  
Plant Test ◽  
Partial Gasification

A new system using combined coal gasification and combustion has been developed for clean and high efficient utilization of coal. Following are the processes. The coal is first partially gasified and the produced fuel gas is then used for industrial purpose or as a fuel for a gas turbine. The char residue from the gasifier is burned in a circulating fluidized bed combustor to generate steam for power generation. For having the experimental investigation, a 1MW pilot plant test facility has been erected. Experiments on coal partial gasification with air, and recycle gas have been made on the 1 MW pilot plant test facility. The results show that, with air as gasification agent, the system can produce 4–5MJ/Nm3 low heating value dry gas and fuel conversion efficiency attains 50–70% in the gasifier, and residue 20–40% converted in the combustor and total conversion efficiency in the system is over 90%. In the gasifier, the carbon conversion efficiency increases with the bed temperature and the air blown temperature. CaCO3 has an effective effect for sulfur removal in the gasifier. The sulfur removal efficiency attains 85% with Ca/S molar ratio 2.5. The system can produce 12–14MJ/Nm3 middle heating value day gas by using high temperature circulation solid as heat carrier and recycle gas or steam as gasification media, but the fuel conversion efficiency only attain 30–40% in the gasifier and most of fuel energy is converted in the combustor. CaCO3 has an obvious effect on tar cracking and H2S removal. The sulfur removal efficiency attains 80% with Ca/S molar ratio 2.5.

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