一处损坏的核电设施会释放一定量的放射性物质,其中一些相对来说危害不大,另一些则要危险得多。/ Y: i* F3 V1 f) v: Y V& Y
* U! m1 G- @7 T! G O, l研究辐射对公众健康影响的非营利组织“辐射与公共安全项目”(Radiation and Public Health Project)的执行理事曼加诺(Joseph Mangano)说,利用高温分裂铀的过程会产生一百多种新的化学物质。 . A3 Y: J0 m: P1 C 7 b2 K' c& U4 n l7 J t佛罗里达州立大学的核物理学家坎倍尔(Kirby Kemper)表示,核反应堆完全熔解后,会释放一些较低毒性的放射性气体,包括氮-16、氚和氪。这些气体比重轻,会快速消散,对人类的危害不大。) ?* i( P4 W" O% y7 B
3 C. A/ D% d2 A* J6 E# [' w一位母亲试图与她被隔离的女儿说话。他的女儿被从福岛核电站附近疏散后因有受辐射迹象而被隔离。 " J, g7 v) H2 G2 s- ]( E, V7 e4 d8 V
Officials checked for signs of radiation on children from the evacuation area near the Fukushima Daini nuclear plant in Koriyama. . I& D. M. {$ p7 u' o+ n+ f t2 G0 e+ A* J
An 8.9-magnitude earthquake struck the coast of Japan on Friday at a depth of about 17 miles below the earth's surface. Dozens of aftershocks, some of magnitude 6.0 or greater, were felt after the quake.