Low-enriched uranium, which has a concentration of 3% to 4% U-235, can be used to produce fuel for nuclear power plants. “Weapons-grade” uranium is enriched to 90%. August 26, 2020: Iran agrees to grant the International Atomic Energy Agency (IAEA) access to two sites that are not part of Iran`s declared nuclear program to support the IAEA`s investigation into Tehran`s possible undeclared nuclear material and activities before 2003. Their agreement ends for a year and a half via the survey. On April 2, 2015, a framework for a nuclear deal with Iran was concluded. In this context, Iran has provisionally agreed to accept restrictions on its nuclear program, all of which would last at least a decade and once again, and to submit to increased intensity of international inspections under a framework agreement. .