New Delhi: In its post-Fukushima review of nuclear safety, India has ramped up safeguards at its atomic power plants with three layers of power back-ups, water pipes drawn from offsite locations, elevated water towers and options for injecting nitrogen to prevent explosions. With public concern spiking after the Japanese disaster and protests threatening projects in Kudankulam and Jaitapur, the government had to move swiftly to beef up plant security. Sources claimed the safety protocols were among the best worldwide. At the Fukushima plant, overheating of the reactor core after the March 11 tsunami knocked out power sources and triggered fears of a meltdown. All Indian plants will have diesel generators and battery back-up to supplement a nuclear plant’s regular power supply in an emergency shutdown.