Optimized Iteration Strategies and Data Management Considerations for Fast Reactor Finite Difference Diffusion Theory Codes

Ferguson, D.R.; Derstine, K.L.

doi:10.13182/nse77-5

Cited by 49 publications

(14 citation statements)

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“…Therefore, a more realist 4 prediction of the maximum increase in count rate would be the change depicted in Fig. % between a void content of 0 and ~60 : an increase by a factor of -20 is predicted.…”

Section: Discussionmentioning

confidence: 99%

“…The result, of course, is lower count rates for a short time as the core completes its retill process: this results in an increase in the effective count rate reduction factor from that value which would be predicted via the instantaneous model. Viewed in this fashion, 4 t can be seen that reduction value factors extracted from Fig. 6 (say, e.g., 20 + 35) then compare favorably with the detector decrease of ~-37.5.…”

Section: Bmentioning

confidence: 91%

See 1 more Smart Citation

Neutronic analysis of the Three Mile Island Unit 2 ex-core detector response

Malloy¹,

Chang²

1981

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Section: Discussionmentioning

confidence: 99%

Section: Bmentioning

confidence: 91%

Neutronic analysis of the Three Mile Island Unit 2 ex-core detector response

Malloy¹,

Chang²

1981

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“…Edit Cross-Section Types by Position and Name .. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] TWODANT/GQ USER'S GUIDE Version 3.0…”

Section: -69mentioning

confidence: 99%

DANTSYS: A diffusion accelerated neutral particle transport code system

Alcouffe¹,

Baker²,

Brinkley³

et al. 1995

270

232

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Los 5-5Version 3.0 iii 16-19Version 3.0 ix Table 5.2: Table 6.1: Table 6.2: Table 7.1: Table 7.2: -. The DANTSYS code package includes the following transport codes: ONEDANT, TWODANT, TWODANT/GQ, TWOHEX, and THREEDANT. This document is the central user, methods and programming documentation for the system of codes. LIST OF FIGURES LIST OF FIGURESThe DANTSYS code package is a modular computer program package designed to solve the time-independent, multigroup discrete ordinates form of the Boltzmann transport equation in several different geometries. The modular construction of the package separates the input processing, the transport equation solving, and the post processing (or edit) functions into distinct code modules: the Input Module, one or more Solver Modules, and the Edit Module, respectively. The Input and Edit Modules are very general in nature and are common to all the Solver Modules. The ONEDANT Solver Module contains a one-dimensional (slab, cylinder, and sphere), time-independent transport equation solver using the standard diamond-differencing method for space/angle discretization. It was previously documented in Ref.1. Also included in the package are Solver Modules named TWODANT, TWODANT/GQ, THREEDANT, and TWOHEX. The TWODANT Solver Module solves the time-independent two-dimensional transport equation using the diamond-differencing method for space/angle discretization and was previously documented in Ref. 2. We have also introduced an adaptive weighted diamond differencing (AWDD) method for the spatial and angular discretization into TWODANT as an option. The TWOHEX Solver Module solves the time-independent two-dimensional transport equation on an equilateral triangle spatial mesh. The user's guide for TWOHEX was previously documented in Ref. The THREEDANT SolverModule solves the time independent, three-dimensional transport equation for XYZ and RZO symmetries using both diamond differencing with set-to-zero fixup and the AWDD method. The TWODANT/GQ Solver Module solves the two-dimensional transport equation in X Y and RZ symmetries using a spatial mesh of arbitrary quadrilaterals. The spatial differencing method is based upon the diamond differencing method with set-tozero fixup with changes to accommodate the generalized spatial meshing.This manual describes the standardized Input and Edit Modules together with each of the Solvers in the package. Throughout this manual we will refer to this package as the DANTSYS code package.Some of the major features included in the DANTSYS code package are: a free-field format ASCII text input capability;standardized, data-and file-management techniques as defined and developed by the Module solves the time independent, three-dimensional transport equation for XYZ and RZO symmetries using both diamond differencing with set-to-zero fixup and the AWDD method. The TWODANTIGQ Solver Module solves the two-dimensional transport equation in X Y and RZ symmetries using a spatial mesh of arbitrary quadrilaterals. The spatial differencing meth...

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“…A typical calculation required 20-30 minutes of computing time on the IBM 360/91. Since D0T3.5 does not employ any convergence acceleration scheme on outer iterations and only non-sophisticated overtaxation on the inner iterations, shorter computing times would be expected using codes such as VENTURE, 0 DIFF30, 10 or FX2.…”

Section: A Diffusion Theorymentioning

confidence: 99%

Transport-diffusion comparisons for small core LMFBR disruptive accidents

Tomlinson¹

1977

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Optimized Iteration Strategies and Data Management Considerations for Fast Reactor Finite Difference Diffusion Theory Codes

Cited by 49 publications

References 0 publications

Neutronic analysis of the Three Mile Island Unit 2 ex-core detector response

Neutronic analysis of the Three Mile Island Unit 2 ex-core detector response

DANTSYS: A diffusion accelerated neutral particle transport code system

Transport-diffusion comparisons for small core LMFBR disruptive accidents

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