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Assessment of the gamma and neutron dose field around the closed-water activation loop at the JSI TRIGA reactorKotnik, Domen, fizik ; Snoj, Luka, 1981- ; Lengar, IgorA closed-water activation loop is being built at the Jožef Stefan Institute TRIGA reactor in Slovenia to serve as a well-defined and stable source of high-energy gamma rays and neutrons. The radial ... piercing port, which penetrates the graphite reflector and touching the reactor core was chosen for the installation of the closed-water loop due to the high neutron flux and favourable shielding conditions of the surrounding concrete bioshield. The main objective of this work is to assess the neutron and gamma dose field outside the port to obtain important details for the final design of the inner part of the irradiation facility and to assess the background noise for the detectors. The main part of the work consists of the design of the shielding plugs and the construction of a detailed MCNP model of the whole irradiation facility. The dose field calculations were performed with a two-step hybrid transport approach using ADVANTG for variance reduction and MCNP for particle transport. Such deep penetration and shielding calculations are challenging and computationally intensive. The results showed that the dose rate using shielding plugs is more than 7 orders of magnitude lower compared to an empty open port. To reduce the computational uncertainty, further optimisation of the ADVANTG input is essential. The final design of the shielding plugs is described. Additional lead shielding blocks will be added outside the port afterwards if neededSource: EPJ web of conferences [Elektronski vir]. - ISSN 2100-014X (Vol. 288, Art. 04003, 2023, 5 str.)Type of material - conference contributionPublish date - 2023Language - englishCOBISS.SI-ID - 178466563
Author
Kotnik, Domen, fizik |
Snoj, Luka, 1981- |
Lengar, Igor
Topics
jedrska fizika |
poskusni reaktor
source: EPJ web of conferences [Elektronski vir]. - ISSN 2100-014X (Vol. 288, Art. 04003, 2023, 5 str.)
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Kotnik, Domen, fizik | 53531 |
Snoj, Luka, 1981- | 27819 |
Lengar, Igor | 19167 |
Source: Personal bibliographies
and: SICRIS
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