Marina Litvinenko does not believe that Russian president Vladimir Putin will extradite the man named by prosecutors as the main suspect in the death of her husband.
Andrei Lugovoy, now a politician in Russia, was named by prosecutors as the main suspect in the case, but Marina Litvinenko said she thought it was unlikely that he would change his mind and extradite him.
Speaking to reporters she said: "I believe Putin will not change his decision to extradite or change his decision."
She added: "What I do is not against Russia because I am Russian and I love my country."
More top news
A High Court judge ruled he was entitled to "more than nominal" damages from police over a wrongful arrest he says destroyed his career.
The ex-Holby City star, who had been visiting Barcelona, detailed the events of the attack on Twitter as they unfolded.
Searches are continuing for victims, with around 600 people still missing and 3,000 left homeless after the disaster.