Shielding and source calculations for the new cyclotron and possible activation in the soil


Shielding and source calculations for the new cyclotron and possible activation in the soil

Konheiser, J.; Ferrari, A.; Naumann, B.; Müller, S.

This presentation summarizes the results of the Monte Carlo simulation of the shielding calculations and estimates of the soil activation for the new cyclotron of the HZDR (Helmholtz-Zentrum Dresden-Rossendorf). The dose values were determined on base of the resulting neutron flux at the 18F production and were carried out with the Monte Carlo code MCNP6. The calculation of the soil activations was performed with FLUKA. The neutron source term was provided by manufacturer. A source check with MCNP6 and FLUKA codes, significant discrepancies were found to the manufacturer supplied data for the neutron source term. For this reason, experiments were carried out on a cyclotron in operation. The comparison confirmed the results of the MCNP/FLUKA calculations.
The estimated dose rate in the public area is about 0.035 μSv/h (28 MeV protons) and thus significantly below the reference value of 0.5 μSv/h(3). After 5 years of continuous beam operation and a subsequent decay time of 30 days, the activity concentration of the soil is about 0.34 Bq/g.

Keywords: shielding calculation; neutron source calculation; cyclotron; MCNP6; FLUKA

  • Lecture (others)
    88. Sitzung des Arbeitskreises Dosimetrie, 20.-21.03.2018, TU Dresden, Deutschland

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Publ.-Id: 27215