Big powers ease terms for nuclear talks with Iran

By Mark Heinrich

LONDON (Reuters) - Major powers have offered Iran preliminary talks on its nuclear work, on condition it limits uranium enrichment to current levels for six weeks in exchange for a freeze on moves towards harsher sanctions, diplomats say.

They said European Union foreign policy chief Javier Solana conveyed the proposal during talks in Tehran last week in which he presented a revised batch of incentives from six powers for Iran to stop pursuing technology that could yield atomic bombs.

The Islamic Republic has repeatedly rejected the sextet's precondition of a full suspension of enrichment-related activity before negotiations to implement the incentives.

Iran has steadily expanded enrichment capacity to 3,600 centrifuge machines compared with 300 two years ago, and gained leverage from soaring oil prices, increasing the pressure on big powers to be more flexible on terms for talks.

Under the "freeze-for-freeze" proposal, Iran would not expand enrichment capacity by adding centrifuge machines for a six-week period, during which the powers would stop moves to sharpen the mild sanctions already in force, the diplomats said.

The interim period would enable "pre-negotiations" to agree parameters for formal negotiations to put the incentives into effect, once Iran has fully suspended enrichment, going beyond the hold-down on centrifuge expansion.

Formal negotiations are envisaged for up to about six months, during which an enrichment suspension would continue, suggested the diplomats, who asked not to be further identified due to political sensitivities.

The idea is not new but appears more time-specific than before, designed to make it more attractive to Iran after a similar suggestion for kick-starting negotiations mooted by Solana in talks with the Iranians last year went nowhere.