The head of Russia''s state nuclear power corporation Rosatom is due to discuss the construction of the Bushehr nuclear power plant in southern Iran on Wednesday.

Sergei Kiriyenko is scheduled to take part in a working meeting with heads of the Atomic Energy Organization of Iran (AEOI) and subcontractors. The meeting will take place at the construction site.

"Today we are starting large-scale work on launching the Bushehr nuclear power plant. In particular, one of the elements will be uploading dummy assemblies in the reactor of the first energy unit," Kiriyenko said.

Earlier, a spokesman for the AEOI said Iran was to start up the $1 billion Bushehr facility for a test on Wednesday.

The plant, which Russia undertook to finish as part of a 1998 contract, was originally scheduled to go on line at the end of 2006, but the date has been pushed back several times.

Russia has cited financial problems for the delay, but it has been suggested Moscow was stalling due to Western suspicions that Tehran could be seeking to build nuclear weapons.

The Islamic Republic insists it needs its nuclear program to generate energy for civilian purposes.