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东京电力欲排77万公吨核辐射水入海 声称不危险

2017-07-14 09:38:58   海外网

安全值之外的隐患

哪怕现在已关闭的福岛核电站仍有着多于一千钢罐被核放射污染的水,不间断的泄漏和倾倒一直在发生,上百吨熔化燃料仍在停止工作的反应堆里面,但基于数据,北美科学界依然乐观。杰伊·卡伦告诉记者:“放射性同位素持续从核电站泄漏,但是谢天谢地,泄漏的速率远低于2011年3-4月灾难的最初阶段。而且大洋环流模型显示,在2017年底到2018年初,我们会在北美沿海水域发现福岛核污染的最高水平。基于我们远海的测量,这些最大值会持续在很低的水平,福岛核事故未来将不会对北美的海洋和人类健康产生影响。”

肯·比塞勒虽然也认同这个最大值,但态度更为严谨些,他用数字进行科普:“铯-134已经快衰竭完了,福岛事故4年后就只剩25%了。在福岛事故6年后,将只有12.5%。”但对有着30年半衰期的铯-137来说,“衰竭的数目更少些,4年之后有91%,6年后还有87%。”

担忧并没有完全消失,民间和科学界都流传着一个最糟糕的设想,福岛核电站的燃料可能使钢筋混凝土的保护壳破裂,然后渗入到地下,不受控制地把放射性物质传播到周围的土壤和地下水中,最终进入大海。

除此之外,日本福岛大学环境放射能研究所科学家青山道夫提供的资料中,中国东海的铯-137活动呈现向北增长的趋势。“铯-137在地表水中的最大活动值出现在中国东海的东北部大部,除了受到福岛沿岸的活动影响之外,也一直被福岛核电站事故场地不间断的泄漏所影响。”

梁湘三看得更远:“事实上我们现在的研究显示,它(铯-137)最后跟着环流又返回到太平洋的西边界,也就是我们的东海岸,最后进入中国海。”他认为,安全标准是没问题,但不间断泄漏和反复倾倒成了隐患。“我们在东海的一些核物质还没有出去,新的又进来,是存在这种堆积可能性的,只是说现在暂时还差很多。”

“我们大家现在都在讨论雾霾,雾霾谁都看得到,但核污染大家真的看不到,它的危害可能更大。”梁湘三深叹了一口气。

责任编辑:孙鑫鑫 CN066
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