Special monitoring results for determination of radionuclide composition of Russian NPP atmospheric releases

Vasyanovich, M. E.; Vasilyev, Aleksey; Екидин, А. А.; Kapustin, Ivan A.; Крышев, А. И.

doi:10.1016/j.net.2019.02.010

Cited by 21 publications

(7 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The practice of operating nuclear power plants in Russia demonstrates that discharges and emissions have a negligible radiation impact on the population and the environment. Nevertheless, the release of longlived radionuclides into the environment can lead to local anomalous content in various environmental objects [13][14]. Atmospheric emissions form an uneven distribution of radionuclides over the area.…”

Section: Resultsmentioning

confidence: 99%

“…• possible critical population groups. As a result of nuclear transformations, hundreds of radionuclides are formed in the reactor core, but only a limited number of them can have an effect on the population and the environment through emissions, discharges and the generation of radioactive waste [11][12][13][14][15][16]. Radioactive substances entering the environment can be in solid, liquid or gaseous states [17,18].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Radiological Assessment of the Belarusian Nuclear Power Plant Site in the Pre-Operational Period

Nazarov

Екидин

Vasiljev

et al. 2020

RAD Conference Proceedings

View full text Add to dashboard Cite

Field studies on the pre-operational period of a Belarusian NPP have allowed us to determine the "background" level of gamma-emitting radionuclides in individual components of the environment. The results of measuring the dose rate at the NPP construction site are from 0.048 to 0.089 μSv/h. External radiation in the surveyed area is at 96% due to 40 K, 226 Ra and 232 Th. The radionuclides in the surface soil layer are: 40 K -from 530 to 700 Bq/kg; 226 Ra -from 30 to 55 Bq/kg; and 232 Th -from 17 to 35 Bq/kg; 137 Cs from 2 to 13 Bq/kg. The dose rate in the floodplain of the Viliya River from 0.033 to 0.082 μSv/h. The activity concentrations of the radionuclides in the surface soil layer of the floodplain of the Viliya River are: 40 K -from 390 to 690 Bq/kg; 226 Ra -from 33 to 50 Bq/kg; 232 Th -from 15 to 50 Bq/kg; 137 Cs -from 3 to 12 Bq/kg. The activity concentration of carbon-14 and tritium in the dominant vegetation species were determined to be: from 74.4 to 111.5 pMC and less than lower range limit, respectively.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Radiological Assessment of the Belarusian Nuclear Power Plant Site in the Pre-Operational Period

Nazarov

Екидин

Vasiljev

et al. 2020

RAD Conference Proceedings

View full text Add to dashboard Cite

show abstract

“…The total continuous activity of natural tritium is estimated to be from 1.85×10 18 to 4.50×10 18 Bq [7].…”

Section: Natural Sourcesmentioning

confidence: 99%

“…In Figures 4-5, the comparison of different sources of tritium and carbon-14 is presented. Studies of gas-aerosol mixture emissions in ventilation systems of Russian nuclear power plants are presented in [18]. The obtained results demonstrate that the contribution of tritium and carbon-14 as a dose-forming nuclide can reach 52% and 98% respectively.…”

Section: Conservative Estimate Of Tritium and Carbon-14 Releases Into The Atmospherementioning

confidence: 99%

Tritium and Carbon-14 in Releases of Nuclear Reactor Facilities of Various Types

Nazarov¹,

Екидин²,

Vasilyev³

et al. 2020

RAP 2019 Conference Proceedings

View full text Add to dashboard Cite

The production of electricity by European nuclear power plants with various types of reactor installations in the period from 1995 to 2017 was considered. For each nuclear power plant in Europe, the median specific emission indicators of tritium and carbon-14 (GBq/GWh) were calculated. Depending on these indexes, all stations were divided into 3 types: with the best, stable and the worst emission practices. A conservative estimate of the contribution of various reactor facilities to the activity of tritium and carbon-14 in the atmosphere was made. To assess the activity of tritium and carbon-14 entering the atmosphere as a result of emissions from the research nuclear reactor an experimental stand was developed.

show abstract

“…In normal operating conditions of nuclear power plants (NPPs), radionuclide emissions into the environment are scarce and mainly consist of carbon-14, tritium, iodine radionuclides, and radioactive noble gases (RNGs). It should be noted that RNGs make 50% to 90% of overall emission activity …”

Section: Introductionmentioning

confidence: 99%

Comparison of Adsorption Coefficients of Argon, Krypton, and Xenon on Various Activated Charcoal Grades in Static Conditions

et al. 2022

View full text Add to dashboard Cite

Coefficients of adsorption (Henry's constants) of noble gases (argon, krypton, xenon) on activated charcoal grades AG-3, VSK-5, SKT-3, NWC 12x40 in the temperature range of 15 °C to 80 °C were determined. Temperature dependence parameters of Henry's constants were determined with a calculation of isosteric adsorption heat values. The experimental data were used to calculate stationary operating conditions of a radiochromatographic column in NPP's noble gas delay system. Out of all the studied charcoals, the results show that coconut charcoals VSK-5 and NWC 12x40 have the highest decontamination factor to airflow purification from radioactive noble gases. They far outweigh sulfur−potassium activated peat charcoal SKT-3 used presently at most Russian nuclear power plants. Activated charcoal AG-3 does not ensure the decontamination level required. The results also show that the overall decontamination factor depends heavily on temperature. Precooling gas flow at the adsorber's input can considerably increase air decontamination factor from radioactive noble gases.

show abstract

Special monitoring results for determination of radionuclide composition of Russian NPP atmospheric releases

Cited by 21 publications

References 2 publications

Radiological Assessment of the Belarusian Nuclear Power Plant Site in the Pre-Operational Period

Radiological Assessment of the Belarusian Nuclear Power Plant Site in the Pre-Operational Period

Tritium and Carbon-14 in Releases of Nuclear Reactor Facilities of Various Types

Comparison of Adsorption Coefficients of Argon, Krypton, and Xenon on Various Activated Charcoal Grades in Static Conditions

Contact Info

Product

Resources

About