Brazil will allow the inspection next week, Campos said. Until then, Brazil and the UN nuclear watchdog are looking for a way to inspect that will "protect the country's technological and trade secrets," Campos said.

Brazil opposes a visual IAEA inspection, claiming that it has a novel method of enriching uranium to protect.

Brazil, which has one of the world's largest uranium reserves, denied IAEA inspectors access in February and March to the uranium-enriching facility in Resende, in the state of Rio de Janeiro.

IAEA director general Mohamed ElBaradei has said Brazil should not be an exception to the organization's norms.

Ten days ago, US Secretary of State Colin Powell, on a two-day official visit here, discussed with President Luiz Inacio Lula da Silva Brasilia's disputes with the IAEA inspectors, saying Washington had no worries about the nuclear program here.

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