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

Monitoring of Radionuclides in the Baltic Sea in 2015 Meerit Kämäräinen and Vesa-Pekka Vartti STUK Environmental Radiation Surveillance and Emergency preparedness SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

Sampling stations & samples • Seawater samples: 10 stations • Sediment samples: 6 stations • Biota and fish samples: 6 stations 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 Bathymetric data, Seifert et al. 2001 SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

Cs-137 in seawater (Bq/m 3 ) in 2015 surface 26/24 bottom 27/31 23 31/28 19,13 19/23 23/28 24/27 27/23 SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

Cs-137 concentrations in surface water in different part of the Baltic Sea between 1980 - 2015 1000 100 Bq/m3 10 Baltic Proper (BY 15, except 1989:BY 2) Bothnian Bay (C VI) Bothnian Sea (EB 1) Gulf of Finland (LL 3a) 1 1980 1985 1990 1995 2000 2005 2010 2015 year SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

Sr-90 in seawater (Bq/m 3 ) in 2015 Surface/Bottom 5.2/7.9 6.8, 5.8 7.1/7.3 6.9/7.5 7.5/7.3 7.4/6.2 SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

3 H 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 SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

Concentrations of 137 Cs (Bq/kg) in sediment as a function of depth in 2015 JML LL3a Gulf of Finland Gulf of Finland Bq/kg Bq/kg 0 100 200 300 400 0 200 400 600 800 1000 1200 1400 0 0 6 6 12 depth (cm) depth (cm) 12 18 24 18 30 24 36 42 30 BY15 EB1 Gotland East Bothnian sea Bq/kg Bq/kg 0 50 100 150 200 0 200 400 600 800 1000 0 0 6 6 12 depth (cm) depth (cm) 18 12 24 18 30 36 24 42 30 SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

137 Cs in the Baltic Sea sediments (Bq/m 2 ) 2014/2015 4370/3980 27300/29251 27700/27800 5140/4760 1880/1840 840/745 SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

Cs-137 in fish (Bq/kg f.w.) in 2015 Herring 4.1/12 1000 Hailuoto Vaasa herring Olkiluoto Bq/kg Seili 100 Tvärminne / pike 4.7/15 10 3.5/15 1 3.5/5.8 3.5/8.4 2.3 / 5.2 Pike Hailuoto Vaasa 1000 Olkiluoto Seili Tvärminne Loviisa 100 Bq/kg 10 Sr-90 in herring: 0.016-0.035 Bq/kg 1 Sr-90 in pike: 0.004-0.016 Bq/kg SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY

Concentrations in plants and bottom animals (Bq/kg d.w. ) in 2015 Fucus vesiculosus 1000 Cs-137 : 15-17 Co-60 : 0.2-0.5 Ag-110m: 0.4 100 Cs-137 Bq/kg Saduria entomon 10 Cs-137 : 9.7 Saduria entomon Sr-90 : 8.3 Mytilus Edulis Fucus vesiculosus, Loviisa Ag-110m: 3.5 Cs-137 : 1.1 Fucus vesiculosus, Olkiluoto Co-60: 0.41 Sr-90 : 9.0 1 SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALEN RADIATION AND NUCLEAR SAFETY AUTHORITY