Peniche (Portugal) (AFP) - Anya wasn't even born when Chernobyl exploded nearly 30 years ago, but even today its radioactive fallout stalks her and other Ukrainian youngsters growing up near the disused plant.The world's worst nuclear disaster saddled the sparkly-eyed 16-year-old with chronic cardiovascular and respiratory problems, thanks to contamination that lingers in the air, water and ground soil around her village.A brief break comes each summer when Anya and a few dozen other children and teens trade their homes for a "clean" holiday on Portugal's west coast."A month's vacation in Portugal can extend their life expectancy by one or two years," said Fernando Pinho, citing a study by doctors at Ivankiv hospital, 45 kilometres (28 miles) from Chernobyl.Pinho, 59, heads "Blue Summer", a project started in 2008 by employees of the Liberty Seguros insurance company to give Ukrainian children a chance to reduce the levels of radioactive caesium that creep into their systems at home.Similar programs are also held in Belgium, France, Germany, Ireland, Italy and Spain, offering a "cure" of sun, sea, clean air and good food to several hundred young Ukrainians each summer.Thirty-four of them came to Portugal this year.