* Iberdrola previously said it agreed to sell 50 pct
Toshiba looks to also buy part of GDF Suez holding
* Majority needed for $14 bln Westinghouse reactor deal
By Sophie Knight
TOKYO, Dec 26 (Reuters) - Toshiba Corp said it is in the final stages of nailing down a majority stake in a British nuclear power consortium after one of the joint shareholders agreed to sell the Japanese company its 50 percent stake.
Securing a long-awaited majority holding in the NuGen consortium would guarantee a $14 billion deal for Toshiba's Westinghouse unit to supply three reactors for the project, Toshiba's Chief Executive Hisao Tanaka told reporters in Tokyo.
A deal for majority control, including part of French utility GDF Suez's 50 percent stake, could be in place as early as January, Tanaka said. That would allow Toshiba to kickstart an ambitious reactor building programme that stalled after countries around the world froze nuclear expansion plans and regulations were tightened in the wake of Japan's 2011 disaster at Fukushima.
Spanish utility Iberdrola SA, which is selling assets to reduce debt, said on Monday it has agreed to sell its 50 percent stake in NuGen to Toshiba for 85 million pounds ($139 million), subject to final approvals, terms and conditions.
Tanaka refused to confirm the details of Iberdrola's announcement. But he said that he expected to strike a final deal with both the Spanish firm and GDF Suez.
"We want a majority to move forward," Tanaka said. "So we would want to take some of GDF's share, but have them remain as an operator."
Tanaka said that a majority stake was necessary to make progress on the project, where delays have frustrated the U.K. government, sources say, as it pushes through its own ambitious nuclear programme to replace new reactors.
A controlling stake would allow Westinghouse, 87 percent-owned by Toshiba, to supply three of its AP1000 reactors for the site, where NuGen is aiming for capacity to produce 3.6 gigawatts of power. After building the reactors, Toshiba would reduce its stake, Tanaka said.
"We are thinking about an exit, but we haven't decided anything yet. We will reduce our majority stake over time. We are a plant provider, not a nuclear power provider," he said. Tanaka said revenue from the project, including the reactors, was expected to be around 1.5 trillion yen ($14.4 billion).
Toshiba remains on the lookout for a buyer for 36 percent of Westinghouse, which would leave it with 51 percent control of the business. But Tanaka reiterated that Toshiba was in no rush to complete a sale, after previously stating that it was looking for an engineering company with expertise in building nuclear plants.