In some samples we found small amounts of antropogenic radionuclides like
106 Ru,
144 Ce,
125 Sb, coming from nuclear atmospheric tests and the cosmogenic
radionuclide
7 Be (Dovlete et al. 1981a).
12.2.4 Black Sea Radioactivity
The monitoring of marine radioactivity in Romanian waters has been performed
jointly by the Romanian Marine Research Institute (RMRI) and the ERL. The first
measurements date back to 1981, but the monitoring programme became systematic since 1984–1985 (Dovlete and Bologa 1986).
As in the case of aerosol and deposition samples from the same period, fission
products were reported for water samples, seaweed and different species of fish
collected from the Black Sea.
The main pathway for
137 Cs input to the Black Sea water was direct atmospheric
fallout from atmospheric nuclear tests.
Before the Chernobyl accident, measurements of near-shore Black Sea surface
water, indicated for
137 Cs a specific activity of 10.4 Æ 2.9 Bq/m
3 and
137 Cs in the
bottom sediments at Constanta, Agigea, Eforie Sud and Jupiter was in the range
1.7–5.2 Bq/kg dry.
Among the species of marine biota from the Romanian sector of the Black Sea,
the radioactivity of which has been systematically measured since 1984, Bryopsis
Plumosa green alga stands out due to the relatively high values of
226 Ra and
228 Ra
and their daughters. Based on time dependence of theoretical and experimental
ratios of the radionuclides from natural series we have established that this species
of alga concentrates radium isotopes from the environment (Dovlete and Osvath
1992). Its concentration factor for Ra is 10
5 , 3 orders of magnitude higher than the
generic values given in (IAEA 2004).
12.3 Post Chernobyl Environmental Radioactivity
in Romania
The sampling stations, relatively uniformly distributed on the territory, included
two high altitude locations in the Carpathian Mountains (Toaca 1907 m and Babele
2238 m). Aerosol samples from high altitude chemical pollution monitoring stations Paring and Fundata were also used for
131 I and
137 Cs measurements in the first
days of May 1986.
12 Pre and Post-Chernobyl Environmental Radioactivity in Romania: a Review
207
106 Ru,
144 Ce,
125 Sb, coming from nuclear atmospheric tests and the cosmogenic
radionuclide
7 Be (Dovlete et al. 1981a).
12.2.4 Black Sea Radioactivity
The monitoring of marine radioactivity in Romanian waters has been performed
jointly by the Romanian Marine Research Institute (RMRI) and the ERL. The first
measurements date back to 1981, but the monitoring programme became systematic since 1984–1985 (Dovlete and Bologa 1986).
As in the case of aerosol and deposition samples from the same period, fission
products were reported for water samples, seaweed and different species of fish
collected from the Black Sea.
The main pathway for
137 Cs input to the Black Sea water was direct atmospheric
fallout from atmospheric nuclear tests.
Before the Chernobyl accident, measurements of near-shore Black Sea surface
water, indicated for
137 Cs a specific activity of 10.4 Æ 2.9 Bq/m
3 and
137 Cs in the
bottom sediments at Constanta, Agigea, Eforie Sud and Jupiter was in the range
1.7–5.2 Bq/kg dry.
Among the species of marine biota from the Romanian sector of the Black Sea,
the radioactivity of which has been systematically measured since 1984, Bryopsis
Plumosa green alga stands out due to the relatively high values of
226 Ra and
228 Ra
and their daughters. Based on time dependence of theoretical and experimental
ratios of the radionuclides from natural series we have established that this species
of alga concentrates radium isotopes from the environment (Dovlete and Osvath
1992). Its concentration factor for Ra is 10
5 , 3 orders of magnitude higher than the
generic values given in (IAEA 2004).
12.3 Post Chernobyl Environmental Radioactivity
in Romania
The sampling stations, relatively uniformly distributed on the territory, included
two high altitude locations in the Carpathian Mountains (Toaca 1907 m and Babele
2238 m). Aerosol samples from high altitude chemical pollution monitoring stations Paring and Fundata were also used for
131 I and
137 Cs measurements in the first
days of May 1986.
12 Pre and Post-Chernobyl Environmental Radioactivity in Romania: a Review
207