Treatment of the Upper Cavity in a Pebble-Bed High-Temperature Gas-Cooled Reactor by Diffusion Theory

Gerwin, H.; Scherer, W.

doi:10.13182/nse87-a23491

Cited by 26 publications

(3 citation statements)

References 2 publications

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“…Also, the streaming of neutrons across void regions such as the gas plenum above the pebble bed is not treated accurately with cell codes such as COMBINE. Gerwin and Scherer 14 developed an analytical treatment that yields diffusion coefficients for the gas plenum between the top of the core and the top reflector. These values are supplied in the PEBBED input and replace those generated using COMBINE or SCAMP.…”

Section: Computational Tools and Sequencementioning

confidence: 99%

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Results of a Neutronic Simulation of HTR-Proteus Core 4.2 using PEBBED and other INL Reactor Physics Tools: FY-09 Report

Gougar¹

2009

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The Idaho National Laboratory's deterministic neutronics analysis codes and methods were applied to the computation of the core multiplication factor of the HTR-Proteus pebble bed reactor critical facility. A combination of unit cell calculations (COMBINE-PEBDAN), 1-D discrete ordinates transport (SCAMP), and nodal diffusion calculations (PEBBED) were employed to yield k eff and flux profiles. Preliminary results indicate that these tools, as currently configured and used, do not yield satisfactory estimates of k eff . If control rods are not modeled, these methods can deliver much better agreement with experimental core eigenvalues, which suggests that development efforts should focus on modeling control rod and other absorber regions. Under some assumptions and in 1-D subcore analyses, diffusion theory agrees well with transport. This suggests that developments in specific areas can produce a viable core simulation approach.

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Section: Computational Tools and Sequencementioning

confidence: 99%

“…Gerwin and Scherer [14]]developed and analytical expression for the diffusion coefficient in the upper plenum. Their expression was used for this study in place of the diffusion coefficients generated by COMBINE and SCAMP.…”

Section: Gaps and Proposed Remediationmentioning

confidence: 99%

Results of a Neutronic Simulation of HTR-Proteus Core 4.2 using PEBBED and other INL Reactor Physics Tools: FY-09 Report

Gougar¹

2009

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“…In R-2 geometry, a spatial mesh of about 3 cm was found to be adequate. In these calculations, the cavity above the pebble-bed was treated as recommended by Gerwin and Scherer (14). However, as BOLD VENTURE does not offer the possibility of a directional dependent diffusion coefficient.…”

Section: Calculation Of 6/amentioning

confidence: 99%

The Measurement and Calculation of the Kinetic Parameter β_eff/Λ of a Small High-Temperature Like, Critical System

Wallerbos

Hoogenboom

1998

Journal of Nuclear Science and Technology

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This paper demonstrates that it is well possible to determine the kinetic parameter P,E/A in a neutronically very slow system by means of noise measurements in the critical state. The advantages of this technique are that it can be conducted in a critical reactor directly, and that no special measurement equipment is needed. The comparison to calculated values for four configurations, which differ in the amount of moderation in the core region, shows a satisfactory agreement.

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LEU-HTR critical experiment program for the proteus facility in Switzerland

Brogli

Bucher

Chawla

et al. 1991

Energy

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Treatment of the Upper Cavity in a Pebble-Bed High-Temperature Gas-Cooled Reactor by Diffusion Theory

Cited by 26 publications

References 2 publications

Results of a Neutronic Simulation of HTR-Proteus Core 4.2 using PEBBED and other INL Reactor Physics Tools: FY-09 Report

Results of a Neutronic Simulation of HTR-Proteus Core 4.2 using PEBBED and other INL Reactor Physics Tools: FY-09 Report

The Measurement and Calculation of the Kinetic Parameter β_eff/Λ of a Small High-Temperature Like, Critical System

LEU-HTR critical experiment program for the proteus facility in Switzerland

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Treatment of the Upper Cavity in a Pebble-Bed High-Temperature Gas-Cooled Reactor by Diffusion Theory

Cited by 26 publications

References 2 publications

Results of a Neutronic Simulation of HTR-Proteus Core 4.2 using PEBBED and other INL Reactor Physics Tools: FY-09 Report

Results of a Neutronic Simulation of HTR-Proteus Core 4.2 using PEBBED and other INL Reactor Physics Tools: FY-09 Report

The Measurement and Calculation of the Kinetic Parameter βeff/Λ of a Small High-Temperature Like, Critical System

LEU-HTR critical experiment program for the proteus facility in Switzerland

Contact Info

Product

Resources

About

The Measurement and Calculation of the Kinetic Parameter β_eff/Λ of a Small High-Temperature Like, Critical System