scholarly journals The Mini Labyrinth – a Simple Benchmark for Radiation Protection and Shielding Analysis

2021 ◽  
Vol 253 ◽  
pp. 07013
Author(s):  
Branislav Vrban ◽  
Štefan Čerba ◽  
Filip Osuský ◽  
Jakub Lüley ◽  
Vladimír Nečas ◽  
...  
Keyword(s):  
Cross Section ◽  
Emission Rate ◽  
State Of The Art ◽  
Dose Equivalent ◽  
Gamma Source ◽  
Partial Agreement ◽  
Benchmark Experiment ◽  
Neutron Count ◽  
Ambient Dose Equivalent ◽  
Ambient Dose

The Mini Labyrinth experiment is a simple neutron and gamma shielding experiment developed at STU, inspired by the ALARM-CF-AIR-LAB-001 ICSBEP benchmark experiment. The STU Mini Labyrinth is approximately ten times smaller and consists of NEUTRONSTOP shielding blocks. This paper describes the second version of the Mini Labyrinth experiment and presents the results of the neutron and gamma fields simulation and measurement. The PuBe neutron source with the emission rate of 1.0E7 n.s-1 was utilized in the experiment. The measurement of gamma ambient dose equivalent H*(10) and neutron count rates is performed by the Thermo Scientific RadEye portable survey meter. The simulation part was carried out using the state-of-the-art MCNP6 and SCALE6 MONACO stochastic calculation tools taking into account the detailed geometry of the labyrinth and a combined neutron and gamma source of particles. The comparisons were performed between codes and an experiment, based on the dose rate in the unique detection positions and using a 2D map of neutron and photon fluxes. The propagation of cross-section uncertainties was investigated through the shielding analysis. Partial agreement between codes and measurement was achieved, however serious discrepancies near the PuBe source were identified.

Decreasing trend of ambient dose equivalent rates over a wide area in eastern Japan until 2016 evaluated by car-borne surveys using KURAMA systems

2019 ◽  
Vol 210 ◽  
pp. 105813 ◽  
Author(s):  
Masaki Andoh ◽  
Satoshi Mikami ◽  
Shuichi Tsuda ◽  
Tadayoshi Yoshida ◽  
Norihiro Matsuda ◽  
...  
Keyword(s):  
Wide Area ◽  
Dose Equivalent ◽  
Ambient Dose Equivalent ◽  
Eastern Japan ◽  
Ambient Dose

scholarly journals Study of the screening survey using an ambient dose equivalent rate survey meter in criticality accidents

2019 ◽  
Vol 6 (0) ◽  
pp. 152-155
Author(s):  
Katsuya Hoshi ◽  
Norio Tsujimura ◽  
Tadayoshi Yoshida ◽  
Osamu Kurihara ◽  
Eunjoo Kim ◽  
...  
Keyword(s):  
Dose Equivalent ◽  
Equivalent Rate ◽  
Ambient Dose Equivalent ◽  
Criticality Accidents ◽  
Screening Survey ◽  
Ambient Dose

scholarly journals Neutrons along the labyrinth of high energy medical accelerators: Effect of wall materials

2019 ◽  
Vol 21 ◽  
pp. 169
Author(s):  
M. Fakinou ◽  
I. E. Stamatelatos ◽  
J. Kalef-Ezra
Keyword(s):  
Monte Carlo ◽  
Cost Effective ◽  
High Energy ◽  
Wall Material ◽  
Mcnp Code ◽  
Dose Equivalent ◽  
Concrete Wall ◽  
Ambient Dose Equivalent ◽  
Wall Materials ◽  
Ambient Dose

Neutron streaming along the labyrinth of a generic bunker of an 18MV medical accelerator was evaluated. Monte Carlo simulations using MCNP code were performed to calculate neutron ambient dose equivalent along the labyrinth. The effect of plain, borated and barites concrete wall material, as well as borated concrete and plywood (Celotex), as neutron absorbing wall liners, was examined. The results of the study suggest that plywood can provide a cost effective material to attenuate neutron streaming along the labyrinth.

scholarly journals Reduction of Outdoor and Indoor Ambient Dose Equivalent after Decontamination in the Fukushima Evacuation Zones

2017 ◽  
Vol 42 (1) ◽  
pp. 42-47 ◽  
Author(s):  
Hiroko Yoshida-Ohuchi ◽  
Takashi Kanagami ◽  
Yutaka Naitoh ◽  
Mizuki Kameyama ◽  
Masahiro Hosoda
Keyword(s):  
Dose Equivalent ◽  
Ambient Dose Equivalent ◽  
Ambient Dose
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