Talks to revive Tehran’s tattered nuclear accord with world powers in Vienna ended Monday as the parties closed a final text and the Iranian negotiator prepared to return to his capital, diplomats said. Russian Ambassador Mikhail Ulyanov, who has represented Moscow’s interests in the talks, said the European Union had circulated “the final text” of the agreement to revive the landmark nuclear deal, which granted Iran sanctions relief in exchange for tight curbs on its nuclear program. The parties “now need to decide if the draft is acceptable for them,” Ulyanov wrote on Twitter. “In case of no…