The Prime Minister has asked the National Disaster Management Authority, NDMA, to upgrade the safety measures at all the country's nuclear plants. Dr. Manmohan Singh asked the concerned agencies to put in place the world's best possible safety precautions and procedures to achieve maximum safety. Dr Singh gave these directions at a high level review meeting in New Delhi.The safety measures are being undertaken by Atomic Energy Regulatory Board and Department of Atomic Energy. Our correspondent reports, the meeting also discussed the guidelines issued by the NDMA for management of earthquakes and tsunamis as well as nuclear safety issues.For Chemical, Biological, Radiological and Nuclear rescue and response readyness, the government has prepared a project for installing hi-tech radiation-measuring gadgets in 35 cities having more than one million population, including Delhi, Mumbai and Kolkata.Early warning forecast and preparedness are being upgraded for tsunami-related damages.A National Earthquake Risk Mitigation Project is also being prepared covering 239 districts in 22 States and Union Territories falling in high-risk zones.The meeting was convened against the backdrop of Fukushima nuclear plant disater in Japan after the devastating earthquake and tsunami.It also took place amid concerns raised by the May 22nd terrorist attack at the Mehran Naval base in Pakistan's port city of Karachi. The two incidents have given rise to concerns in India and elsewhere about the safety and security of vital installations.