German industrial conglomerate Siemens AG (SI) Friday said it will discuss its planned nuclear energy joint venture with Russia 's Rosatom in view of the competition restrictions imposed on Siemens by a court Thursday, which could end up delaying or derailing its plans to become a major force in the field of nuclear energy.

The arbitral tribunal of the International Chamber of Commerce Thursday ruled Siemens is not allowed to compete with France 's Areva SA (CEI.FR) until Sept. 25, 2013 , since Siemens had not fully met its obligations toward Areva when it quit their nuclear-power joint venture Areva NP in 2009.

"Naturally we want to discuss the possibilities and implications of the judgment with our Russian counterparts," a Siemens spokesman told Dow Jones Newswires Friday, with reference to the planned tie-up with Rosatom.

The Siemens spokesman said the judgment and its grounds must firstly be examined in great detail.

"This will understandably be carried out in consideration of the events in Japan , the global market environment, and also societal and political aspects," the spokesman said, adding Siemens will comment on the proceedings after that.

Russia 's Rosatom also said it is still studying the ruling and will decide with Siemens later on how to proceed. A spokesman for the Russian company said there is no time frame set for such a decision.

The International Chamber of Commerce Thursday ruled that Siemens will have to pay back Areva EUR648 million plus interest, after initially receiving EUR1.62 billion from Areva for buying it out of the joint venture, Siemens said in a statement.

Siemens earlier this year sold its 34% holding in Areva NP to Areva SA, which gained full control. The price for transferring the stake was based on the opinion of an independent adviser that in March valued the stake at EUR1.62 billion.

Siemens decided to exit Areva NP more than two years ago and at the time said it planned to form a partnership with Russia 's Rosatom instead.

However, Siemens is considering whether to abandon its goal of becoming a major player in the atomic-power industry, several unconfirmed news reports said in recent months.

Siemens's Chief Financial Officer Joe Kaeser in April fuelled such speculation when he told Germany 's Der Tagesspiegel newspaper that " Fukushima has to be an occasion for taking stock [of nuclear energy]," referring to the nuclear accident in Japan .

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