Ducts and Voids in Shields

Huddleston, C. M.; LeDoux, J. C.; Burrus, W.R.; Bergel'son, B. R.; Mashkovich, V. P.; Aalto, E.; Nilsson, Jonas; Sandlin, R.; Vesely, W. E.; Maerker, R.E.; Claiborne, H.C.; Clifford, C.E.

doi:10.1007/978-3-662-25858-3_8

“…[1][2][3][4][5][6][7][8][9] But the desired degree of simplification cannot always be achieved in most of them, since enormous preparatory calculations are necessary to estimate the radiation shielding properties for using the formulae.…”

Section: Introductionmentioning

confidence: 99%

Improvement of a Simple Evaluation Method for Duct Streaming by Taking Account of the Deep Penetration Component

Maki

¹

,

Morimoto

²

,

Shibata

³

2001

Journal of Nuclear Science and Technology

1

0

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A simplified formula for radiation streaming through bent ducts was previously derived by optics analogy, considering only components passing through the duct and without enormous preparatory calculations. Now, by taking account of deep penetrating component, the streaming formula is improved in order to estimate not only γ -ray flux but also neutron flux with accuracy, factor 2-3, applicable to preliminary shielding designs. Dose rates at the exit estimated by the improved formula are compared with experimental values. As for γ -ray evaluated values become conservative by improvement, while evaluated values were underestimated before improvement. Also for neutron, the discrepancy between the calculated values by the present formula and observed ones becomes within factor 2 after improvement from factor 3 before improvement. From these results, it is concluded that the improved formula is applicable to preliminary shielding designs.

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“…Various simplified evaluation formulae for radiation streaming have been derived. [1][2][3][4][5][6][7][8][9] But the desired degree of simplification cannot always be achieved in most of them, since enormous preparatory calculations are necessary to estimate the radiation shielding properties for using the formulae.…”

Section: Introductionmentioning

confidence: 99%

Improvement of a Simple Evaluation Method for Duct Streaming by Taking Account of the Deep Penetration Component.

Maki

¹

,

Morimoto

²

,

Shibata

³

2001

J. Nucl. Sci. Technol.

1

0

View full text Add to dashboard Cite

A simplified formula for radiation streaming through bent ducts was previously derived by optics analogy, considering only components passing through the duct and without enormous preparatory calculations. Now, by taking account of deep penetrating component, the streaming formula is improved in order to estimate not only γ -ray flux but also neutron flux with accuracy, factor 2-3, applicable to preliminary shielding designs. Dose rates at the exit estimated by the improved formula are compared with experimental values. As for γ -ray evaluated values become conservative by improvement, while evaluated values were underestimated before improvement. Also for neutron, the discrepancy between the calculated values by the present formula and observed ones becomes within factor 2 after improvement from factor 3 before improvement. From these results, it is concluded that the improved formula is applicable to preliminary shielding designs.

show abstract

Void effects and the determination of “patches” for radiation distributions in heterogeneous multilayer shields

Sayedahmed

¹

,

Makarious

²

,

Kansouh

³

1989

International Journal of Radiation Applications and Instrumenta

0

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Ducts and Voids in Shields

Cited by 4 publications

References 22 publications

Improvement of a Simple Evaluation Method for Duct Streaming by Taking Account of the Deep Penetration Component

Improvement of a Simple Evaluation Method for Duct Streaming by Taking Account of the Deep Penetration Component

Improvement of a Simple Evaluation Method for Duct Streaming by Taking Account of the Deep Penetration Component.

Void effects and the determination of “patches” for radiation distributions in heterogeneous multilayer shields

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