Iran said its hotly awaited proposal to break the deadlock with world powers over its nuclear drive was well received Tuesday, in fresh talks seen as a key test for new President Hassan Rouhani.

The hour-long PowerPoint presentation by Foreign Minister Mohammad Javad Zarif and his team was for the first time delivered in English, Western officials said, underlining a new mood in the often-tense nuclear discussions.

Senior Iranian negotiator Abbas Araqchi praised the "very positive environment" and said the "reaction was good" across the table.

He told reporters in Geneva after Tuesday's opening session that all sides had agreed not to reveal details, but insisted the proposal was "very comprehensive".

"The climate of the meeting was very good and very constructive. The proposal that we have introduced has the capacity to make a breakthrough," he said.

“Our objective is to guarantee our country's right to peaceful use of nuclear activities, including [uranium] enrichment, and to ensure that the nature of these activities is peaceful,” said Araqchi.

He also explained that both sides have put forth a common objective to resolve Iran’s nuclear issue, adding that this objective could be achieved by taking a set of mutual measures.

Commenting on the goals and characteristics of Tehran’s new proposed package, Araqchi said the plan underlines Tehran’s right to continue uranium enrichment and operate nuclear facilities including research reactors.

Araqchi added, “Peaceful nuclear cooperation between the parties, transparency, supervision by International Atomic Energy Agency (IAEA), lifting of all [UN] Security Council, unilateral and multilateral sanctions, [and] setting a time frame are among the measures to be taken in the final step [of the plan].”

NJF/NJF