Authors & Affiliations
Bychkov V.B., Ershova L.S., Malyshkin G.N., Modestov D.G., Samarin S.I., Sokolov Yu.A., Khmelnisky D.V.
Russian Federal Nuclear Center - Zababakhin All-Russia Research Institute of Technical Physics, Snezhinsk, Russia
Bychkov V.B. – Head of the Group, Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics.
Ershova L.S. – Researcher, Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics. Contacts: post box 245, 13, Vasilyev st., Snezhinsk, Chelyabinsk region, Russia, 456770. Tel.: +7(351)465-11-55; e-mail:
Malyshkin G.N. – Head of the Laboratory, Cand. Sci. (Phys.-Math.), Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics.
Modestov D.G. – Senior Researcher, Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics.
Samarin S.I. – Leading Researcher, Cand. Sci. (Phys.-Math.), Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics.
Sokolov Yu.A. – Leading Researcher, Cand. Sci. (Phys.-Math.), Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics.
Khmelnisky D.V. – Deputy Head of the Department - Head of the Theoretical Laboratory, Cand. Sci. (Phys.-Math.), associate professor, Russian Federal Nuclear Center – Zababakhin All-Russia Research Institute of Technical Physics.
Abstract
For calculation substantiation of radiation safety of atomic energy objects, verification of calculation techniques is compulsory, and first of all, according to the results of experiments. In order to obtain such data, on VNIITF calibration dosimetry facility BU-01 “Etalon-2M”, a series of precise experiments was conducted on measuring exposure and effective dose rate behind samples of various thickness out of iron, lead and polyethelene from γ-quanta of cobalt and cerium sources. In the first series of measurements, the thickness of the samples was fixed: for lead, it was 1.3 cm, for iron - 3 cm and for polyethelene ~5 cm. In the second series, the thickness increased: up to ~5 cm for lead and up to ~10 cm for iron and polyethelene. Dose rate was measured by dosimeter DKS–AT5350/1. In its content, ionization chamber TM 32002 was used.
The work presents the description and the results of measurements. Mathematical model of the facility was built, and numerical modeling of experiments according to the code PRIZMA was conducted with evaluated data from EPDL-97 library. It was shown that the difference between the results of calculation and measurements for relative (normalized to a dose in absence of materials) values of dose makes ~3%, for absolute values does not exceed 15%, and this can be connected with uncertainty in characteristics of the source.
Keywords
precision experiments, exposure dose rate, effective dose rate, code PRIZMA, library EPDL-97
Article Text (PDF, in Russian)
UDC 621.039.58