India has expressed concern over China for supplying nuclear reactors to Pakistan. The Minister of State for Science and Technology and Earth Sciences, Mr. Prithviraj Chavan said in Kalpakkam, Tamil Nadu that the global community should closely look at the collaboration considering Islamabad's track record on nuclear technology. Mr. Chavan said that India has expressed concerns at the appropriate place, citing previous illegal exchanges of nuclear technology. The Minister was talking to newspersons on the sidelines of the silver jubilee celebrations of the Fast Breeder Test Reactor and Radiometallurgy Laboratory at Kalpakkam yesterday. On allowing private domestic or foreign companies operate nuclear power stations amending Atomic Energy Act, Mr. Chzavan said the UPA government does not find a need to change the law.The Minister also said, India is interested in buying uranium mines overseas to overcome shortage of the yellow metal. He said that India stands ready to share its experience in nuclear science and technology on a mutually acceptable basis. Mr. Chavan said that India's indigenous 220 MW and 540 MW capacity pressurised heavy water reactors are available for export to countries within the ambit of international framework.