VIENNA (Reuters) -Iran has begun installing advanced IR-6 centrifuges in a cluster at an underground enrichment plant in line with a longstanding plan and now intends to add two more such clusters, or cascades, the U.N. nuclear watchdog told its member states on Wednesday.
The moves are described in a confidential International Atomic Energy Agency report sent to member states shortly before the IAEA's 35-nation Board of Governors passed a resolution criticising Iran for failing to explain uranium traces found at undeclared sites. Iran had warned of retaliation.
