Dehgan's comments come just two days before a deadline for Iran to give its response to the International Atomic Energy Agency (IAEA) over historic allegations of a military dimension to its nuclear research.
"The agency carried out several visits to Parchin (before 2005), took samples and found nothing untoward," Dehgan told the ISNA news agency.
"There is therefore no reason for new access to Parchin as nothing new has come up since the last inspections."
Access to Parchin was not agreed under the terms of that accord but the IAEA has been seeking to visit the base as part of its mission to answer all concerns about Iran's nuclear programme, past and present.
Addressing the allegations, long denied by Tehran, would be an important element in the comprehensive deal on Iran's nuclear programme that world powers are seeking to reach by November 24.
IAEA director Yukiya Amano, who visited Tehran earlier this month, said in June that access to Parchin was essential for the watchog to be able to certify Iran's nuclear programme as peaceful.
In his June report, Amano said satellite photographs suggested there had been fresh activity at the base this year.
"Since February this year, we again start to observe activities... These activities continue," he said.
Iran has repeatedly refused the IAEA access to the base but "we keep on insisting to have access to that particular site in Parchin, to the people and to their documents," Amano said in the report.
Dehgan also said that his country refused to give the agency information on its scientists in the defence industry.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
