Environmental remediation of nuclear legacy sites in the Russian Northwest: regulatory approach

Shandala, N. K.; Seregin, V. A.; Sneve, Malgorzata; Киселев, С. М.; Kosnikov, Aleksander; Smith, Graham M.

doi:10.2495/ehr090241

Cited by 2 publications

(3 citation statements)

References 2 publications

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“…For the ADER map from figure 4 [11], the fractal dimension D was determined by equation (6). According to the method [30] the map of area S was divided into square cells with side δ.…”

Section: Fractal Characteristics Of Ader Time Dependenciesmentioning

confidence: 99%

“…In 2001, at the time of the transfer of the CTB Andreeva Bay from the Ministry of Defense of the Russian Federation to the Ministry for Atomic Energy of the Russian Federation (now the State Atomic Energy Corporation Rosatom), almost all the units of the storage facility were classed as being in emergency status [5], were degraded and continuously contaminating the environment. Total activity of radionuclides at the STS site activity was estimated from measurements taken in 2002 and was 1.3•10 17 Bq [6] (table 1). The activity on the site is determined by dividing the ambient dose equivalent rate (ADER) integral (see section 3 below for details) for the technical site by the conversion coefficient for 137 Cs, evenly dispersed by an infinitely thin layer over a flat surface.…”

Section: Introductionmentioning

confidence: 99%

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Radiation situation dynamics at the Andreeva Bay site for temporary storage of spent nuclear fuel and radioactive waste over the period 2002–2016

Chizhov

Sneve²,

Shandala³

et al. 2018

J. Radiol. Prot.

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The Coastal Technical Base (CTB) №569 at Andreeva Bay was established in the early 1960s and intended for the refueling of nuclear submarine reactors and temporary storage of spent nuclear fuel (SNF) and radioactive waste (RW). In 2001, the base was transferred to the Russian Ministry for Atomic Energy and the site remediation began. The paper describes in detail the radiation situation change at the technical site in Andreeva Bay from 2002–2016, the period of preparation for the most critical phase of remedial work: removal of spent fuel assemblies. The analysis of aggregated indicators and data mining were used. The article suggests the best number and location of checkpoints needed to ensure sufficient accuracy of the radiation situation description. The fractal properties of the radiation field are studied using the Hurst index. The relationship between checkpoints was assessed using the method of searching for checkpoint communities. The decrease in the integral of the ambient dose equivalent rate (ADER) at the technical site was evaluated by the method of time series decomposition. Three components of time series were identified: trend, seasonal and residual. The trend of the ADER integral over the technical site is a monotonic decreasing function, where the initial and final values differ tenfold. Taking into account that 137Cs dominates the radiation situation on-site, it is clear that the ADER due to the radionuclide decay will have decreased by 1.4 times. It is estimated that only a small proportion of 137Cs has migrated off-site. Therefore, approximately a sevenfold decrease in dose rate is mainly due to remediation activities of personnel. During the year, the seasonal component varies the ADER integral by a factor of two, due to snowfall. The residual component reflects the uncertainty of the ADER integral calculation and phases of active SNF and RW management. The methods developed are used to support the optimization of remediation work as well as regulatory supervision of occupational radiation protection.

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“…For the ADER map from figure 4 [11], the fractal dimension D was determined by equation (6). According to the method [30] the map of area S was divided into square cells with side δ.…”

Section: Fractal Characteristics Of Ader Time Dependenciesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Radiation situation dynamics at the Andreeva Bay site for temporary storage of spent nuclear fuel and radioactive waste over the period 2002–2016

Chizhov

Sneve²,

Shandala³

et al. 2018

J. Radiol. Prot.

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“…Studies in Kazakhstan's neighboring countries have found that vegetation on dumps naturally regenerates in a pattern similar to primary succession, which is the process of plant colonization on a previously unvegetated area. These studies provide valuable insights for post-mined reclamation in Kazakhstan (Shandala et al 2016;Belov et al 2020;Korniyenko et al 2020;Khismatullin et al 2021;Klimova et al 2021;Tchoroev 2021;Treschevskaya et al 2021;Edelev et al 2022;Henyk et al 2022;Chaplygina et al 2023).…”

Section: Introductionmentioning

confidence: 97%

Natural vegetation communities on the iron ore dumpsites in Northern Kazakhstan

SIMANCHUK,

SULTANGAZINA

2023

Biodiversitas

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Abstract. Simanchuk Y, Sultangazina G. 2023. Natural vegetation communities on the iron ore dumpsites in Northern Kazakhstan. Biodiversitas 24: 3414-3423. Mining can significantly impact the landscape, clearing vegetation and causing other environmental damage. Reclamation and revegetation are often used to restore degraded land after mining. One reclamation method is passive restoration, which allows vegetation to regenerate naturally. In this study, we investigated the primary stages of syngenesis at the dumpsites of the Sokolov Sarbai Mining Production Association (SSGPO JSC), including the Sokolov and Sarbai deposits and the Kachary Ruda JSC. The age of the dumps studied ranged from two to forty years. According to the degree of syngenesis, the vegetation cover of the dumps was divided into three groups: pioneer groups, group-thicket communities, and diffuse communities. A total of sixty-three standard geobotanical descriptions were made. The composition of plant cenopopulations for saline and non-saline soils was analyzed. A comprehensive floristic analysis of the list of plants, as well as the activity of species in terms of their importance, was carried out. Dominant plants with a high class of consistency were highlighted. The study of syngenesis stages showed that, despite the long period of existence of the dumps, the formation of zonal or intrazonal communities did not occur. The initial stages of syngenesis were characterized by a random and unstable floristic composition of plant communities. The ecological species heterogeneity of the first stages of syngenesis was documented in the spread of species of different coenotic groups. It was determined that salinity slowed down the rate of syngenesis stage change, reduced the number of species, and altered floral composition in saline soils compared to non-saline ones. Even at old dump sites, the floristic composition was incomplete compared to natural phytocenoses.

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Environmental remediation of nuclear legacy sites in the Russian Northwest: regulatory approach

Cited by 2 publications

References 2 publications

Radiation situation dynamics at the Andreeva Bay site for temporary storage of spent nuclear fuel and radioactive waste over the period 2002–2016

Radiation situation dynamics at the Andreeva Bay site for temporary storage of spent nuclear fuel and radioactive waste over the period 2002–2016

Natural vegetation communities on the iron ore dumpsites in Northern Kazakhstan

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