Finland to build world's first permanent nuke waste facility

2015-11-12 21:07

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Helsinki - Finland's government gave the green light on Thursday for the construction of the world's first permanent repository designed to store nuclear waste for 100 000 years.

"The government granted Posiva Ltd a licence to construct a spent nuclear fuel encapsulation plant and disposal facility at Olkiluoto," it said in a statement.

The underground tunnels, where the radioactive high-level nuclear waste is to be buried, already go down to a depth of between 400 and 450m near the Olkiluoto nuclear power plant in Eurajoki in western Finland.

The tunnels have already been constructed to study and verify the solidity of the area's rockbed where the waste is to be housed for around 100 000 years before its level of radioactivity begins to dissipate.

"This is the world's first authorisation for the final repository of used nuclear waste," Finland's Economy Minister Olli Rehn said at a press conference.

A similar project is under way in neighbouring Sweden where a final decision on the construction hasn't yet been made.

The storage method consists of encapsulating the spent fuel in copper-coated containers, placing them deep underground in a hole in the rock which is then sealed with a buffer of bentonite clay, a volcanic ash that swells when mixed with water.

Some experts have warned that a new glacial period could extend a permafrost as deep underground as 800m but Posiva's representatives said the plan is to monitor and, if necessary, to move the encapsulated waste.

"Finland's radiation safety centre has assessed the method," said Rehn.

The cost for the repository's entire life cycle, up to 100 000 years, is estimated at €3.5bn.

Read more on:    finland  |  nuclear

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