Radiation survey around “the 30 th  shipyard” company: 30 years after the accident

Alexey V. Titov; Титов Алексей Викторович; Natalia K. Shandala; Шандала Н. К.; Dmitry V. Isaev; Исаев Д. В.; Natalya Y. Novikova; Новикова Н. Я.; Vladimir A. Seregin; Серегин В. А.; Mariya P. Semenova; Семенова М. П.; Anna A. Filonova; Филонова А. А.; Tatyana A. Doroneva; Дороньева Т. А.; Renata A. Starinskaya; Старинская Р. А.; Vitaly G. Starinskiy; Старинский В. Г.; Vladimir V. Shlygin; Шлыгин В. В.; Sergey V. Akhromeev; Ахромеев С. В.

doi:10.47470/0016-9900-2020-99-7-674-681

Radiation survey around “the 30^th shipyard” company: 30 years after the accident

Авторлар: Titov A.V.¹, Shandala N.K.¹, Isaev D.V.¹, Novikova N.Y.¹, Seregin V.A.¹, Semenova M.P.¹, Filonova A.A.¹, Doroneva T.A.¹, Starinskaya R.A.¹, Starinskiy V.G.¹, Shlygin V.V.¹, Akhromeev S.V.¹
Мекемелер:
1. State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency
Шығарылым: Том 99, № 7 (2020)
Беттер: 674-681
Бөлім: ENVIRONMENTAL HYGIENE
##submission.datePublished##: 08.09.2020
URL: https://archivog.com/0016-9900/article/view/639697
DOI: https://doi.org/10.47470/0016-9900-2020-99-7-674-681
ID: 639697

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Аннотация

Introduction. The objective of this work was the radiation survey in the vicinity of “The 30th Shipyard” Company. The studies were carried out during the period between 2014 and 2016 within the supervision area and in the area of the radioactive trace formed after the accident of 1985 in the nuclear submarine.

Material and methods. The following methods were used in the course of the survey: pedestrian gamma surveys, gamma spectrometry measurements of radionuclides using a gamma spectrometer, and radiochemical extraction of 90Sr, followed by measurement of its activity at radiometric installations.

Results. Gamma ambient dose equivalent rate within the supervision area beyond the radioactive trace varies within the range between 0.09 and 0.18 µSv/h. The specific activities of ⁹⁰Sr, ¹³⁷Cs, and ²³⁵U in soil do not exceed 11, 34, and 5.8 Bq/kg, respectively. The specific activity of ⁶⁰Co in the soil of the Dunay village is lower 0.42 Bq/kg and does not exceed 4.9 Bq/kg at the rest part of the supervision area. The area of the radioactive trace limited by 0.13 µSv/h iso-line does not exceed 0.5 km², while that limited by 0.3 µSv/h iso-line - 0.0063 km². Within the area of the trace, the highest value of the gamma dose rate accounts for 0.60 µSv/h. Soils contaminated with emergency radionuclides do not belong to solid radioactive waste. Emergency radionuclides migrated in soil up to 20 cm depth. Today, ¹³⁷Cs is firmly fixed in the soil. 40-45% of ⁶⁰Co activity is in acid-soluble form. Under specific conditions, it can migrate deep into the soil and be accessible to plants.

Conclusions. Within the supervision area of “The 30th Shipyard” Company, except for the area of the radioactive contamination trace induced by the accident, the radiation situation is the same as that in the area of the Primorskiy Krai. The soil of the radioactive trace does not belong to solid radioactive waste. In the future, the improvement of the radiation situation on the trace will be mainly due to the physical decay of radionuclides.

Негізгі сөздер

nuclear submarines, observation area, soil, radiation survey, gamma radiation, radiation accident, solid radioactive waste, specific activity, disposal

Әдебиет тізімі

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Radiation survey around “the 30^th shipyard” company: 30 years after the accident

Толық мәтін

Аннотация

Негізгі сөздер

Авторлар туралы

Alexey Titov

Natalia Shandala

Dmitry Isaev

Natalya Novikova

Vladimir Seregin

Mariya Semenova

Anna Filonova

Tatyana Doroneva

Renata Starinskaya

Vitaly Starinskiy

Vladimir Shlygin

Sergey Akhromeev

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Radiation survey around “the 30th shipyard” company: 30 years after the accident

Толық мәтін

Аннотация

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Әдебиет тізімі

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Radiation survey around “the 30^th shipyard” company: 30 years after the accident