NEW : Limit raised from 150 millisieverts to 47 millisieverts . The effort to restore offsite power to the site also continued . U.N. president apologizes . TEPCO official bursts into tears . TEPCO nuclear agency : No harmful radiation is detected at any of 150 sites .
NEW : Limit raised from 150 millisieverts to 47 millisieverts . U.N. president apologizes . TEPCO official bursts into tears . TEPCO nuclear agency : No harmful radiation is detected at any of 150 sites .