National project improves radiation emergency response capabilities in food control chain
The project’s primary purpose was to improve the domestic food control system’s capability of responding to possible radiation emergencies. Participants included six regional state administrative authorities (86 %), 49 municipal food control units (40 %) and 27 laboratories (77 %). Participating municipalities created the required contacts to laboratories that provide analysis services on a local basis. This also enhanced the competences of laboratory personnel and supported method management.
Municipal controlling authorities collected a total of 926 samples of mushrooms, berries, game and fish, in order to analyse their radioactive cesium-137 contents. The European Commission has recommended a limit value of 600 Bq/kg (Bq=Becquerel) for commercial products. As expected from earlier research, the recommended limit value was exceeded by several mushroom samples (16 %), particularly Lactarius spp and Russula spp picked from medium or high fallout areas. In practice, however, Lactarius spp and part of Russula spp mushrooms are normally pre-handled by boiling. This dissolves much of the radioactive cesium into water, reducing concentrations in the mushrooms actually consumed. The average concentration for all mushroom samples was 426 Bq/kg. Variation, however, was high since the concentrations ranged by mushroom species and sampling area, between the detection limit and 3,690 Bq/kg.
Game and berry samples remain below the limit value
All but one of the game, berry and fish samples remained below the 600 Bq/kg limit value recommended by the Commission. The average concentrations of berry, game and fish samples were 74 Bq/kg, 93 Bq/kg and 188 Bq/kg, respectively.
Based on the project’s findings, there is no reason to limit the consumption of domestic natural products. However, in high fallout areas, it is advisable to pre-handle mushrooms by boiling or soaking them in a large amount of water, as instructed by Evira and STUK.
Guidelines for handling of mushrooms issued by Evira and STUK: http://www.evira.fi/portal/en/evira/publications/?a=view&productId=196
The final report of the project for enhancing food radioactivity control in municipalities is available (in Finnish) on Evira’s website: http://www.evira.fi/portal/fi/evira/asiakokonaisuudet/vierasaineet/tutkimukset_ja_projektit/elintarvikkeiden_radioaktiivisuusvalvonnan_tehostaminen/
For more information, please contact:
Ulla Karlström, Senior Inspector, Evira, tel. +358 40 487 7798, ulla.karlstrom evira.fi
Eila Kostiainen, Scientist, STUK, tel +358 9 759 88 516, eila.kostiainen stuk.fi
STUK’s 24-h information officer outside office hours, tel. +358 10 850 4761