Iran says it is building the heavy-water reactor to produce radioactive isotopes for medical treatments.

Its primary use was for producing radioactive isotopes.

Tehran says that it needs the reactor to produce medical isotopes.

The cyclotron produced isotopes for dozens of research centers and companies.

Iran needs the 20 percent uranium for a research reactor to produce medical isotopes for cancer patients.

The government says it will produce radioactive isotopes for medical treatments.

The Berkeley cyclotron was later used to produce medical isotopes for research and treatment.

The reactor was used to produce several isotopes.

The reactor also produces rare isotopes for use in medicine and industry.

The two remaining produce radioactive isotopes for health care and for research purposes.