Iran’s sole nuclear power plant is now linked to the national energy grid at full capacity after having to be taken off-line for two months, the Iranian Atomic Energy Organisation said on Wednesday.

“There are no particular problems,” organisation head Fereydoon Abbasi Davani told state television.The plant in Bushehr, whose construction was started by Germany before Iran’s 1979 Islamic revolution and later completed by Russian firm Rosatom, has been plagued by delays and technical issues.

It was officially commissioned in August 2010 and was meant to have been fully operational by the end of that year, but was only plugged into the national grid in late 2011. The International Atomic Energy Agency (IAEA) reported in November that fuel had been unloaded from the Bushehr reactor, shutting the plant down. Western diplomats said that raised fears of safety at the facility.

But Iran, which has been discreet about the difficulties encountered at the nuclear plant, dismissed speculation that the unloading was because of any technical problem and called it a routine procedure.

“After a two-month shutdown needed to check the fuel and the reactor, the Bushehr power plant was linked to the national grid on Saturday and reached its full capacity of 1,000 megawatts” on Tuesday, said Abbasi Davani.

The Bushehr plant does not adhere to the Convention on Nuclear Safety drawn up after the 1986 Chernobyl disaster in order to improve transparency and safetIran also poured water on the UN nuclear watchdog’s hopes of securing access in talks next week to a military complex where suspected past research intro atomic bomb triggers might have been carried out.

Iranian Atomic Energy Organisation Freydoon Abbasi Davani said Tehran would not agree to any inspections beyond those of declared nuclear sites required by the Non-Proliferation Treaty.

“Our talks with them will be based on laws and regulations and based on the rights of our nation,” Abbasi Davani told state television. “We will not accept anything more than what is in the NPT.”

For the past year, the International Atomic Energy Agency has been trying to reach agreement with Iran on a “structured approach” to allow inspectors to conduct spot checks on sites not covered by the treaty.

Foremost among those is the Parchin military complex outside Tehran, a non-nuclear site where the IAEA suspects Iran may have conducted past tests of conventional explosives that could be used to detonate an atomic bomb.

After a visit to Tehran last month, IAEA chief inspector Herman Nackaerts said he was confident that an agreement could be finalised at next Wednesday’s talks and that access to Parchin would be “part of” it.

He had expressed similar optimism in December 2011, only for his hopes to be dashed early last year.Abbasi Davani said that Iran remained ready to answer any concerns the watchdog had, provided it was given the intelligence on which they were based.