Modeling of emergency zones for protective actions planning in case of radiation emergency based on relevant data related to the Fukushima Prefecture

«Radiation and Risk», 2020, vol. 29, No. 1, pp.140-153

DOI: 10.21870/0131-3878-2020-29-1-140-153

Authors

Aron D.V. – Researcher. Contacts: 52 Bolshaya Tulskaya str., Moscow, Russia, 115191. Tel.: +7(495) 276-20-00+466; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. .
Volkov A.D. - Intern
Dyakov S.V. – Deputy Head of Dep.
Zaryanov A.V. - Engineer. IBRAE RAS

Nuclear Safety Institute of RAS, Moscow

Abstract

The paper considers principles of design of advanced plan of action in potentially hazardous areas affected by an accident in nuclear facilities, as well as applicability of the developed algorithm of making decisions on further actions that should be taken after the active phase of the accident in the emergency actions zone. The areas are divided into specific zones for actions planning, such as zones for precautionary actions and for emergency actions. The planning actions are aimed at reduction of exposure of the public to radiation contamination, they include evacuation of people living in radioactively contaminated areas and deactivation measures. The decisions on emergency measures that should be taken are based on analysis of annual committed effective doses of external radiation. Modeling of zones for emergency planning and recommended boundaries of the zone for protective measures was performed. The models were based on relevant data related to the Fukushima Prefecture. Two options of planning zones were studied, i.e. municipal corporations and smaller administrative units, gathered into clusters with the use of mathematical models for zoning. When modeling of sensitivity of results to main parameters of decisions making, i.e. individual committed effective dose to residents, ranged from 10 to 100 mSv/yr and the relative fraction of residents with dose that exceeded the reference dose in each planning zone (the fraction varied from 5 to 30%) was tested. The number of people recommended for resettlement was compared with the number of people with doses exceeded the annual dose limit. Boundaries of recommended zones from which the residents should be relocated were compared with actual boundaries of zones for evacuation and resettlement in the Fukushima Prefecture in 2011. Finally, advance planning zones for protective measures is ready to practical use. Algorithm for decisions making based on analysis of distribution of committed effective dose will be ready to use after practical improvement of algorithms for automatic zoning of areas.

Key words
effective dose, radiation accident, protective measure, evacuation, decontamination, resettlement, emergency plans, precautionary action zone, cluster analysis, Fukushima, zoning.

References

1. Preparedness and response for a nuclear or radiological emergency: general safety requirements. IAEA Safety Standards Series No. GSR Part 7. Vienna, IAEA, 2015. 136 p.

2. Kutkov V.A., Tkachenko V.V. The Fukushima-Daiichi NPP accident as a stress-test for the national system for public protection in the event of a severe nuclear power plant accident. Izvestiya vyzov. Yadernaya energetika – Nuclear Energy and Technology, 2016, no. 4, pp. 67-77. (In Russian).

3. Kutkov V.A., Tkachenko V.V., Saakian S.P. Basic strategies of public protection in a nuclear power plant beyond-design basis accident. Izvestiya vyzov. Yadernaya energetika – Nuclear Energy and Technology. 2015, no. 4, pp. 5-14. (In Russian).

4. Actions to protect the public in an emergency due to severe conditions at a light water reactor. Vienna, IAEA, 2013. 135 p.

5. NP-032-01. Razmeshcheniye atomnykh stantsiy. Osnovnyye kriterii i trebovaniya po obespecheniyu bezopasnosti: federal’nyye normy i pravila v oblasti ispol’zovaniya atomnoy energiii [Nuclear power plants siting. Basic safety criteria and requirements: federal regulations on atomic energy use]. Moscow, Gosatomnadzor of Russian Federation. 12 p.

6. RB-094-14. Rukovodstvo po bezopasnosti pri ispol’zovanii atomnoy energii. Minimizatsiya radiatsionnykh posledstviy dlya naseleniya i personala pri likvidatsii posledstviy avariy na energoblokakh atomnykhelektrostantsiy raznykh tipov. Metodika optimizatsii mer po zashchite naseleniya i territoriy [Atomic energy use safety manual: Minimizing the radiation consequences for the population and personnel during the elim-ination of consequences of accidents at power units of NPPs of different types. Methodology for optimizing measures of the population and territories protection]. Moscow, Scientific and Engineering Centre on Safety in Nuclear Energy of Rostechnadzor, 2014. 45 p.

7. Ivanov E.A., Kosov A.D., Illarionenkova D.V. Problems of the emergency zoning at NPP. ANRI, 2006, no. 4, pp. 2-6. (In Russian).

8. ICRP, 2007. The 2007 Recommendations of the International Commission on Radiological Protection. ICRP Publication 103. Ann. ICRP, 2007, vol. 37, no. 2-4, pp. 1-332.

9. Database for radioactive substance monitoring data. Official Internet resource of the Japan Atomic Energy Agency. Available at: http://emdb.jaea.go.jp/emdb/en/ (Accessed 16.09.2019).

10. Official Internet resource of the Statistics Bureau of Japan, Ministry of Internal Affairs and Communications. Available at: http://www.stat.go.jp/english (Accessed 16.09.2019).

11. Monitoring information of environmental radioactivity level. Official Internet resource of the Nuclear Regula-tion Authority, Japan. Available at: http://radioactivity.nsr.go.jp/en (Accessed 16.09.2019).

12. Aron D.V. The assessment of the economic impact and effectiveness of temporary population evacuation in Fukushima Prefecture. Radiatsiya i Risk – Radiation and Risk, 2019, vol. 28, no. 3, pp. 24-35. (In Russian).

13. Brotikovskaya D., Zobnin D. Algorithm k-means. Article on the internet portal «AlgoWiki». Available at: https://algowiki-project.org/ru/%D0%90%D0%BB%D0%B3%D0%BE%D1%80%D0%B8%D1%82%D0%BC_ k_%D1%81% D1%80%D0%B5%D0%B4%D0%BD%D0%B8%D1%85_(k-means) (Accessed 16.09.2019).

14. Official Internet resource of the Ministry of the Environment Government of Japan. A section with up-to-date information on the status of deactivation in Japan. Available at: http://josen.env.go.jp/en/decontamination (Accessed 16.09.2019).

15. Basic concept and issues to be challenged for rearranging the restricted areas and areas to which evacuation orders have been issued where step 2 has been completed. Nuclear Emergency Response Headquar-ters. December 26, Japan, 2011. Available at: https://www.meti.go.jp/english/earthquake/nuclear/ roadmap/pdf/20111226_01.pdf (Accessed 16.09.2019).

Full-text article (in Russian)