Application of the Single Surface Extended Model of Geometrical Splitting in Monte Carlo

Dubi, A.; Goldfeld, A.; Burn, K. W.

doi:10.13182/nse85-a18363

Cited by 11 publications

(2 citation statements)

References 9 publications

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“…While, for the importance of the shield corresponding to the minimum N which meets the following equation, (4) only for the shield thickness x obtained by (5) the importance can be obtained with the same procedure as Eq. (3) with curve A.…”

Section: Basic Methodsmentioning

confidence: 99%

Importance Determination Method for Geometry Splitting with Russian Roulette in Monte Carlo Calculations of Thick and Complicated Core Shielding Structure.

Murata¹,

Shindo²,

Shiozawa³

1995

J. Nucl. Sci. Technol.

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In case of a shielding analysis of the geometry having thick and complicated structures with a Monte Carlo code, it is a serious problem that it takes too much computer time to obtain results with good statistics. Therefore, it is very important to reduce variances in the calculation. In this study, a method to determine the importance function in 3-dimensional Monte Carlo calculation with geometry splitting with Russian roulette was developed for the shielding analysis of thick and complicated core shielding structures. Only two essential importance ratio curves for one material enable us to determine the importance function easily in the shielding calculation. The validity of this method was confirmed through a simple benchmark calculation. From the comparison with the result obtained by using weight window (W-W), it was shown that the present method can give an accurate result on the same level with W-W method with less trial and errors. And this method was applied to an actual reactor core shielding analysis to confirm its applicability to a 3-dimensional thick and complicated structure. Using this method, the variance reduced calculation can be easily realized with the developed importance determination procedure, especially in case that parameter survey calculations are required in order to determine the shield thickness in a design work of a thick and complicated structure. Accordingly, it became easier to use Monte Carlo method as a powerful tool for a reactor core shielding design.

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Section: Basic Methodsmentioning

confidence: 99%

Importance Determination Method for Geometry Splitting with Russian Roulette in Monte Carlo Calculations of Thick and Complicated Core Shielding Structure.

Murata¹,

Shindo²,

Shiozawa³

1995

J. Nucl. Sci. Technol.

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show abstract

“…The distance between the splitting planes, the number of planes, and the splitting value are generally set by an optimization procedure. A detailed discussion of these procedures can be found in Lux (1983), Booth (1985), and Dubi and Goldfeld (1985). In this study, the splitting planes were separated by the mean free path of the full energy photon and a splitting factor of 2 was used.…”

Section: Photon Splitting and Russian Roulettementioning

confidence: 99%

Determination of flow profiles in porous media using shifts in gamma spectra

Jasti

Fogler

1990

AIChE Journal

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A new technique was developed to determine the tracer location and fluid velocity in porous media nonintrusively. This technique exploits the competitive effects between the photoelectric interaction and the Compton scattering phenomenon to determine the distance between a radioactive tracer in a porous medium and an externally positioned detector. The photon energy distribution shifts toward lower photon energies as the tracer moves away from the detector. The shift in the energy distribution can be quantified by the ratio of the scattered photon intensity to the full energy photon intensity. A convective-dispersion model was used to determine the spatial distribution of the radioactive tracer. An analog Monte Carlo method was developed to simulate photon transport in porous media. Comparison between experimental data and the model shows that in-situ tracer velocities can be accurately predicted.

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Present status and future prospects of neutronics Monte Carlo

Gelbard

1990

Progress in Nuclear Energy

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Application of the Single Surface Extended Model of Geometrical Splitting in Monte Carlo

Cited by 11 publications

References 9 publications

Importance Determination Method for Geometry Splitting with Russian Roulette in Monte Carlo Calculations of Thick and Complicated Core Shielding Structure.

Importance Determination Method for Geometry Splitting with Russian Roulette in Monte Carlo Calculations of Thick and Complicated Core Shielding Structure.

Determination of flow profiles in porous media using shifts in gamma spectra

Present status and future prospects of neutronics Monte Carlo

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