Comparison of Line Beam Response Function for Gamma-ray Skyshine Analysis Based on Single Scattering Method with the Monte Carlo Calculations.

Harima, Yoshiko; Hirayama, Hideo; Sakamoto, Yukio; Kurosawa, Naohiro; Nemoto, Makoto

doi:10.3327/jnst.34.856

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…According to the results, the improved geometrical progression formula gave an enhanced fit for all values of buildup factors up to 100 mfps, within about 15%. Furthermore, the validity of the geometrical progression parameters was tested and the possibility to obtain a buildup factor for a mixture was demonstrated [13].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Buildup Factor in Gamma-Ray Measurement

et al. 2017

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Gamma ray measurement is an important issue in nuclear technology, since it is widely used in industry, medicine, agriculture, education research, and some military applications. Gamma ray is also needed to build radiation protection, which is very useful for human health. When gamma radiation penetrates through shielding material, it generates two radiation components within or beyond the shield, namely: the uncollided and the collided photons. Therefore, the buildup factor is an important parameter for gamma ray measurement. Buildup factor is defined as the ratio of the total number of particles at a given point to the number of uncollided particles, at that same point. In this work, we evaluate the gamma-ray buildup factors for copper , as a function of energy, for 0.511, 0.662, 1.275 MeV, by using cesium and sodium radioactive sources. The results show that the value of energy buildup factor decreases with increasing gamma energy, and increases with increasing thickness. Moreover, it was found that at high energies (1.275 MeV), the absorption buildup factor is at minimum when the energy is at high level. The results also reveal that there is no contribution from the scattering photons to the value of buildup factor, in general, at low intensity levels, when the geometry structure is built well. While for bad geometry, the detector measures intensity, which is greater than that described by the main linear attenuation coefficient, because the scattered photons will be detected as well. All in all, in order to get rational results, a well geometry should be used for the future applications.

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Section: Introductionmentioning

confidence: 99%

“…Harima, et al [13] improved the geometrical progression fitting function for 28 single-material gamma-ray buildup factors to approximate the deep penetration up to 100 mfps. The results were tested by the least squares fit and the minimization of maximum fractional deviation.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Buildup Factor in Gamma-Ray Measurement

et al. 2017

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The integral first collision kernel method for gamma-ray skyshine analysis

Sheu¹,

Chui²,

Jiang³

2003

Radiation Physics and Chemistry

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Evaluation Technique on the BWR Turbine Skyshine Analysis Based on the MCNP-Line Beam Response Coupled Method

平沼¹,

松岡²,

河野³

et al. 2005

Transactions of the Atomic Energy Society of Japan

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A refinement of a simplified QAD-SKYSHINE calculation for gamma-rays skyshine emitted from a turbine building of nuclear power plant is performed by the hybrid method using the MCNP Monte Carlo code. In this method, a detailed Monte Carlo transport calculation is firstly used to determine the energy and emission angle of an crossing point of the gamma-rays through the turbine building wall into atmosphere. Then, the computationally efficient integral Line-Beam method is used to transport gamma-ray from this pseudosource to the distant location at which the skyshine dose is to be calculated. Where, the Line-Beam response functions are generated by the MCNP and fitted to the four-parameter formula. The present developed method is able to estimate precisely skyshine dose within short time.

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Comparison of Line Beam Response Function for Gamma-ray Skyshine Analysis Based on Single Scattering Method with the Monte Carlo Calculations.

Cited by 3 publications

References 6 publications

Investigation of Buildup Factor in Gamma-Ray Measurement

Investigation of Buildup Factor in Gamma-Ray Measurement

The integral first collision kernel method for gamma-ray skyshine analysis

Evaluation Technique on the BWR Turbine Skyshine Analysis Based on the MCNP-Line Beam Response Coupled Method

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