( FILES ) File photo dated 17 April 2008 of a general view of Asco ' s nuclear plant , in Asco village , Tarragona , Catalonia region , northeastern Spain . Tarragona ' s Public Prosecutor Office began proceedings against Asco ' s Nuclear Plant 23 April 2008 after it was reported in early April that there was a leak of radiactive particles from nuclear plant ' s ventilation system 29 November 2007 . Some 850 people had been tested for nuclear contamination , including 40 students and four teachers who visited the plant 04 April 2008 . Authorities plans to check up to 1 , 600 people . EPA / Jaume Sellart < 저작권자 ⓒ 2007 연 합 뉴 스 . 무단 전재 - 재 배포 금지 . >