Environmental radioactivity in Romania Danube river area during 1986–1990

et al. 2009

Radiochimica Acta

Activation analysis / Halite / Trace element / Natural radioactivity / Underground laboratorySummary. Three highly sensitive analytical methods: epithermal neutron activation analysis (ENAA), radiometric assay and UV/Vis spectroscopy were used to investigate the elemental composition of both halite and mineral fractions (sediments) of salt collected from the Slanic-Prahova salt mine, near the location of Low Background Radiation Laboratory. For halite with all three methods and within experimental uncertainties, it was not possible to observe the presence of any natural radioactive elements. For the mineral fraction both radiometric and ENAA showed the presence of 40 K, 232 Th and 238 U in concentrations comparable to the upper continental core (UCC). The same was true for the distribution in the mineral fraction of 7 other major (Na, Al, Cl, K, Ca, Ti and Fe) and 29 trace elements (Sc, U) as determined by epithermal neutron activation analysis (ENAA), which demonstrates a continental origin of the sediments in the existing salt deposit.

Section: Uv/vis Spectrometric Measurementsmentioning

confidence: 99%

Epithermal neutrons activation analysis, radiochemical and radiometric investigations of evaporitic deposits of Slanic-Prahova (Romania) salt mine

Cristache¹,

Simion²,

et al. 2009

Radiochimica Acta

“…Judging on the date presented on the Romania Map, the 137 Cs contamination reached maximum values up to 100 kBq m − 2 , mainly in the south-westerns regions and in some places on the northern border with the Ukraine while on the rest of territory, the contamination was lower even almost absent as the case of north-eastern Danube Delta (Duliu et al, 1996). In this regard, some studies performed after May 1986 evidenced a continuous presence of 137 Cs in Romanian soil (Paunescu et al, 1992, Margineanu et al, 1998, 2018.…”

Section: Introductionmentioning

confidence: 96%

137Cs distribution on the territory of Romania 30 years after Chernobyl accident

Blebea-Apostu

Duliu

et al. 2023

Environ Monit Assess

To estimate the contribution of Chernobyl 137 Cs contamination, in 1993 and especially 2016, its total inventory was determined by gamma-ray high-resolution spectroscopy in 62 and respectively 747 soil samples covering the entire Romanian territory. This permitted us to estimate the 1993 and 2016 total 137 Cs inventory to 43 ± 2 TBq and respectively to 14.1± 0.7 Tbq, the last one reduced by a factor of 3 ± 0.3. This value, about twice higher than natural disintegration suggests a signi cant amount of 137 Cs being washed out by precipitation and, in a lower measure, incorporated into plants. At the same time, by evaluating the maximum contribution of 137 Cs to the population exposure, in 1993 and especially in 2016, the supplementary annual effective dose did not exceed, the maximum accepted value of 1 mSv.3. Availability of data and material: All data generated or analyzed are included in this article.4. Code availability: Not applicable for this section.

“…Judging on the date presented on the Romania Map, the 137 Cs contamination reached maximum values up to 100 kBq m − 2 , mainly in the south-westerns regions and in some places on the northern border with the Ukraine while on the rest of territory, the contamination was lower even almost absent as the case of north-eastern Danube Delta [ 6]. In this regard, some studies performed after May 1986 evidenced a continuous presence of 137 Cs in Romanian soil [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

137Cs distribution on the territory of Romania 30 years after Chernobyl accident

Blebea-Apostu

Duliu

et al. 2022

Preprint

To estimate the contribution of Chernobyl 137Cs contamination, in 1993 and especially 2016, its total inventory was determinate by gamma-ray high resolution spectroscopy in 62 and respectively 747 soil samples covering entire Romanian territory. This permitted to estimate the 1993 and 2016 total 137Cs inventory to 43 ± 2 TBq and respectively to 14.1 ± 0.7 Tbq, the last one reduced by factor of 3 ± 0.3. This value, about twice higher than natural disintegration suggests a significant amount of 137Cs being washed out by precipitation and, in a lower measure, incorporated into plants. At the same time, by evaluating the maximum contribution of 137Cs to the population exposure, in 1993 and especially in 2016, the supplementary annual effective dose did not exceed, the maximum accepted value 1 mSv.