Kiriyenko told a news conference today that the project has safeguards to prevent this. He said fuel for the plant will come from Russia and spent fuel from the plant returned to Russia.
He also urged an end to media "clamor" surrounding delays in the plant's construction.
Kiriyenko said Iran should make its payments if it wants the plant completed.
"Of course, we cannot finish the construction of the [Bushehr] nuclear power plant at our own expense," he said. "It is a commercial project and we are ready to complete it in accordance with the signed agreement. Therefore, a group of our negotiators are in Tehran today, and we are ready to receive Iranian representatives [in Moscow] again if necessary."
Tehran denies it has missed payments.