核的危害全.ppt

RISKS OF NUCLEAR POWER The principal risks associated with nuclear power arise from health effects of radiation. This radiation consists of subatomic particles traveling at or near the velocity of light---186,000 miles per second. They can penetrate deep inside the human body where they can damage biological cells and thereby initiate a cancer. If they strike sex cells, they can cause genetic diseases in progeny. 与核电相联系的主要危险来自辐射对健康的影响。这种辐射包括亚原子颗粒以光速或接近光速运行——每秒186000英里。它们可以深深穿透到身体内部，在体内它们可以损伤生物细胞，然后引发癌症。如果它们攻击性细胞，它们可以导致子孙后代的基因疾病。 核辐射，或通常称之为放射性，存在于所有的物质之中，这是亿万年来存在的客观事实，是正常现象。核辐射是原子核从一种结构或一种能量状态转变为另一种结构或另一种能量状态过程中所释放出来的微观粒子流。 Nuclear radiation, or often called radioactive substances being present in all of this is the existence of hundreds of millions of years, the objective fact is a normal phenomenon. Nuclear radiation is the transition from one energy state structure or a structure to another state or another kind of energy released in the process of microscopic particles stream. Radiation occurs naturally in our environment; a typical person is, and always has been struck by 15,000 particles of radiation every second from natural sources, and an average medical X-ray involves being struck by 100 billion. While this may seem to be very dangerous, it is not, because the probability for a particle of radiation entering a human body to cause a cancer or a genetic disease is only one chance in 30 million billion (30 quintillion). 辐射在我们环境中自然地发生；通常每个人每秒钟受到来自自然源的15000个粒子的攻击，一直都是这样，平均一次医学X射线要受一千亿个粒子的攻击。可能这看起来会非常危险，其实不会，因为一个辐射粒子进入人体引发癌症或基因疾病的可能性是三千万分之一。 Nuclear power technology produces materials are called radioactive. The accidents taken together, with accidents treated probabilistically, will expose the average to about 0.2% of his exposure from natural radiation. Since natural radiation is estimated to cause about 1% of all cancers, radiation due to nuclear technology should eventually increase our cancer risk by 0.002% (one part