Efficiency Assessment of Sanitary-Technical Barriers in Nuclear Facilities by Means of Adhesive Decontaminating Foils

Authors

  • Tzvetan Marinov Kozloduy NPP PLC, Bulgaria and Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences
  • Hristo Protohristov Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences
  • Nikolay Goutev Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences
  • Dobromir Dimitrov Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences
  • Alexandar Nikolov Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences
  • Nasko Mihov Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences
  • Anguel Demerdjiev Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences
  • Elena Geleva Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences
  • Dimitar Tonev Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences
  • Dimitar Tonev Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences

DOI:

https://doi.org/10.7546/CRABS.2022.12.03

Keywords:

radioactivity, gamma-ray spectroscopy, adhesive decontamination foil, whole-body monitor, nuclear power plant

Abstract

The efficiency of sanitary-technical barriers in Kozloduy NPP, Bulgaria, is investigated for the first time with adhesive decontaminating foils. The duration of use and retention coefficient are assessed using gamma-ray spectroscopy. The retained activity increases linearly up to a saturation point at 250 controlled persons. About 6% of the radioactive mechanical fraction is fixed on the adhesive. For three successive sanitary-technical barriers in the controlled zone, the activity is reduced by one to two orders of magnitude on each barrier towards the sanitary complex exit. The total activity released during annual maintenance is estimated to be 105 Bq. The radioactive contamination in the controlled zone is studied and correlations are established between two groups of isotopes, generated by the release of fission products and by neutron activation.
Our investigation demonstrates that the sanitary technical barriers prevent efficiently the release of radioactivity from the controlled zone to the environment.

Author Biographies

Tzvetan Marinov, Kozloduy NPP PLC, Bulgaria and Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences

Mailing Address:
Kozloduy NPP PLC
3321 Kozloduy, Bulgaria

and

Institute for Nuclear Research and Nuclear Energy,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse Blvd
1784 Sofia, Bulgaria

E-mail: tsvmarinov@abv.bg

Hristo Protohristov, Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences

Mailing Address:
Institute for Nuclear Research and Nuclear Energy,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse Blvd
1784 Sofia, Bulgaria

E-mail: proto@inrne.bas.bg

Nikolay Goutev, Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences

Mailing Address:
Institute for Nuclear Research and Nuclear Energy,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse Blvd
1784 Sofia, Bulgaria

E-mail: nikolay.v.goutev@hotmail.com

Dobromir Dimitrov, Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences

Mailing Address:
Institute for Nuclear Research and Nuclear Energy,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse Blvd
1784 Sofia, Bulgaria

E-mail: dobri@inrne.bas.bg

Alexandar Nikolov, Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences

Mailing Address:
Institute for Nuclear Research and Nuclear Energy,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse Blvd
1784 Sofia, Bulgaria

E-mail: artynik@abv.bg

Nasko Mihov, Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences

Mailing Address:
Institute for Nuclear Research and Nuclear Energy,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse Blvd
1784 Sofia, Bulgaria

E-mail: nmihov2002@yahoo.co.uk

Anguel Demerdjiev, Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences

Mailing Address:
Institute for Nuclear Research and Nuclear Energy,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse Blvd
1784 Sofia, Bulgaria

E-mail: a.demerdziev@gmail.com

Elena Geleva, Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences

Mailing Address:
Institute for Nuclear Research and Nuclear Energy,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse Blvd
1784 Sofia, Bulgaria

E-mail: lenag@inrne.bas.bg

Dimitar Tonev, Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences

Mailing Address:
Institute for Nuclear Research and Nuclear Energy,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse Blvd
1784 Sofia, Bulgaria

E-mail: dimitar.tonev@inrne.bas.bg

Dimitar Tonev, Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences

Mailing Address:
Institute for Nuclear Research and Nuclear Energy,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse Blvd
1784 Sofia, Bulgaria

E-mail: dimitar.tonev@inrne.bas.bg

Downloads

Published

23-12-2022

How to Cite

[1]
T. Marinov, “Efficiency Assessment of Sanitary-Technical Barriers in Nuclear Facilities by Means of Adhesive Decontaminating Foils”, C. R. Acad. Bulg. Sci., vol. 75, no. 12, pp. 1725–1733, Dec. 2022.

Issue

Section

Physics