It appears in a submission from the Norwegian Radiation on EIA of the Johan Sverdrup development.
In the EIA says Statoil produced water will be injected into the reservoir as production support.
Significant emissions
Produced water is water that naturally found in the geological structure, and water injected into the reservoir to maintain pressure. The water in the geological structure containing radioactive substances (see fact box).
Statoil informs that produced water on Johan Sverdrup will be released into the sea when the injection facility is inoperative. It is expected a high regularity of the injection plant, but it is still expected emissions 1-2000000 cubic meters of produced water per year when water production is at its peak, says NRPA.
“It is not given any information on specific activity of radioactive nuclides in the water on Johan Sverdrup. But with large volumes of water emissions can be substantial, “writes NRPA statement that TU read.
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Calls for information
The group has investigated whether there are alternative geological structures such as the produced water can be injected into, if problems arise with injecting the produced water to the reservoir.
The results of the survey show that these opportunities are limited by the large amounts of water.
NRPA believes Statoil impact ought contained more information about where large amounts are involved.
“It appears neither the radioactive substances it is appropriate for and what effects these emissions will result if water injection must be stopped,” writes NRPA.
In a recent memo on radioactive emissions, TU have seen, NRPA up emissions in the petroleum industry.
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Looking for purification
NRPA writes that it is important to focus on the petroleum industry’s zero discharge.
“There is currently only injection of radioactive substances to reason that may reduce inflows to the sea of radioactive contamination. NRPA has ordered to investigate whether there are cleaning technology that can be used on the Norwegian shelf to clean the radioactive substances from produced water, but Norwegian Oil Industry Association has so far not been able to find some methods of cleaning, “says the note.
NRPA refers to OSPAR targets for 2020 (see fact box), which Norway has adopted. The states that emissions to northeastern parts of the Atlantic should be reduced gradually so that the concentration of substances in the environment is close to the background levels.
“It is not a general decline in the radioactive emissions from the petroleum industry. It is therefore doubtful whether Norway will be able to meet the OSPAR objectives by 2020, “writes NRPA.
Spokesperson Oliver Heradstveit Statoil says to TU that it is too early for the company to comment on the matter since the deadline expires today.
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