The Yongbyon reactor could be operational again within a year.
Washington warns of new sanctions after a UN report says Iran is expanding nuclear enrichment activities.
Chavez alleges that the US is plotting a military coup against him after Morales blames Washington for upheavals in eastern Bolivia. The US, however, denies these claims.
Officials in Moscow deny any link between the conflict in Georgia and the Caribbean exercises.
The court ruled that, by shutting down the plant, the activists were preventing greater property damage from climate change.
Ministers of the Organization of Petroleum Exporting Countries meet Tuesday in Vienna and may unofficially ease back on production levels that are above OPEC quotas.