Cristin-resultat-ID: 1268920
Sist endret: 24. september 2015, 18:27
Resultat
Rapport
2014

Fate of radium isotope 226 in the sea originating from offshore produced water discharges on the Norwegian continental shelf

Bidragsytere:
  • Jørgen Skancke
  • May Kristin Ditlevsen og
  • Henrik Rye

Utgiver/serie

Utgiver

SINTEF rapport

Serie

SINTEF Rapport
ISSN 1504-9795

Om resultatet

Rapport
Publiseringsår: 2014
Antall sider: 24
ISBN: 9788214057461

Importkilder

SINTEF AS-ID: A26446

Beskrivelse Beskrivelse

Tittel

Fate of radium isotope 226 in the sea originating from offshore produced water discharges on the Norwegian continental shelf

Sammendrag

Oil platforms on the Norwegian shelf discharge large volumes of produced water which is highly enriched in radioactive nuclides like 226Ra. In the recipient water, 226Ra may spread in both dissolved and solid form. Here, we investigate the fate of discharged 226Ra from production on 44 platforms on the Norwegian continental shelf for two scenarios; one where all 226Ra is released as dissolved matter, and one where 226Ra is released as solid matter bound in the lattice of BaSO4. Our approach is to follow the fate of discharged particles over four years to allow for long-time effects to take place, such as solid matter settling on the seabed and subsequent resuspension from sediments. We find that when 226Ra is released as dissolved matter radioactive concentrations drop rapidly around discharge areas for most platforms, although for some platforms concentration levels about 1mBq/L persist for kilometres around discharge locations. When 226Ra is released in solid form, concentrations in sediments reaching up to 15 Bq/kg is predicted over a time period of 30 years for the most impacted areas.

Bidragsytere

Jørgen Skancke

  • Tilknyttet:
    Forfatter
    ved Klima og miljø ved SINTEF Ocean

May Kristin Ditlevsen

  • Tilknyttet:
    Forfatter
    ved Klima og miljø ved SINTEF Ocean

Henrik Rye

  • Tilknyttet:
    Forfatter
    ved Klima og miljø ved SINTEF Ocean
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