Monitoring of Radionuclides in the Baltic Sea in 2015 Meerit Kmrinen - - PowerPoint PPT Presentation

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Feb 15, 2023 338 likes •450 views

Monitoring of Radionuclides in the Baltic Sea in 2015 Meerit Kmrinen and Vesa-Pekka Vartti STUK Environmental Radiation Surveillance and Emergency preparedness STEILYTURVAKESKUS STRLSKERHETSCENTRALEN RADIATION AND NUCLEAR

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SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

Monitoring of Radionuclides in the Baltic Sea in 2015

Meerit Kämäräinen and Vesa-Pekka Vartti STUK Environmental Radiation Surveillance and Emergency preparedness

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SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

Sampling stations & samples

Sea Water : LL17, EB 1, CVI, LL3a, BY15, US5b, JML, OL2, LO 02, LO R1 Sediment : LL17, EB 1, CVI, LL3a, BY15, JML Biota and Fish: Seili, Tvärminne, Vaasa, Hailuto, Loviisa, Olkiluoto

Seawater samples: 10

stations

Sediment samples: 6

stations

Biota and fish samples: 6

stations

Bathymetric data, Seifert et al. 2001

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SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

Cs-137 in seawater (Bq/m3) in 2015

26/24 31/28 19/23 23/28 24/27 27/23 surface bottom 27/31

19,13 23

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SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

Cs-137 concentrations in surface water in different part of the Baltic Sea between 1980 - 2015

1 10 100 1000 1980 1985 1990 1995 2000 2005 2010 2015 Bq/m3 year Baltic Proper (BY 15, except 1989:BY 2) Bothnian Bay (C VI) Bothnian Sea (EB 1) Gulf of Finland (LL 3a)

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SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

Sr-90 in seawater (Bq/m3) in 2015

5.2/7.9 7.5/7.3 7.4/6.2 Surface/Bottom 7.1/7.3 6.9/7.5

6.8, 5.8

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SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

3H in seawater (Bq/l) in 2015

Surface/Bottom

<0.9/<0.9 <0.9/<0.9 <0.9/<0.9 <0.9/<0.9 <0.9/<0.9

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SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

Concentrations of 137Cs (Bq/kg) in sediment as a function of depth in 2015

6 12 18 24 30 36 42 200 400 600 800 1000 1200 1400 depth (cm) Bq/kg

LL3a

Gulf of Finland

6 12 18 24 30 36 42 200 400 600 800 1000 depth (cm) Bq/kg

EB1

Bothnian sea

6 12 18 24 30 50 100 150 200 depth (cm) Bq/kg

BY15

Gotland East

6 12 18 24 30 100 200 300 400 depth (cm) Bq/kg

JML

Gulf of Finland

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SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

137Cs in the Baltic Sea sediments (Bq/m2)

2014/2015

4370/3980 27300/29251 27700/27800 5140/4760 840/745 1880/1840

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SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

Cs-137 in fish (Bq/kg f.w.) in 2015

1 10 100 1000 Bq/kg

Pike

Hailuoto Vaasa Olkiluoto Seili Tvärminne Loviisa

herring / pike

4.1/12 4.7/15 3.5/15 3.5/5.8 3.5/8.4 2.3/5.2

Sr-90 in herring: 0.016-0.035 Bq/kg Sr-90 in pike: 0.004-0.016 Bq/kg

1 10 100 1000 Bq/kg

Herring

Hailuoto Vaasa Olkiluoto Seili Tvärminne

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SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

Concentrations in plants and bottom animals (Bq/kg d.w. ) in 2015

Saduria entomon Cs-137 : 9.7 Sr-90 : 8.3 Ag-110m: 3.5 Co-60: 0.41 Fucus vesiculosus Cs-137 : 15-17 Co-60 : 0.2-0.5 Ag-110m: 0.4 Mytilus Edulis Cs-137 : 1.1 Sr-90 : 9.0

1 10 100 1000 Cs-137 Bq/kg Saduria entomon Fucus vesiculosus, Loviisa Fucus vesiculosus, Olkiluoto