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新华社东京6月16日电(记者华义)日本东芝公司日前宣布,将与日本国际核退役研究所合作开发出一款新型水下机器人,计划今年夏天在福岛第一核电站3号机组内投入使用。
这款配备多个螺旋桨的水下机器人长约30厘米,直径约13厘米,前后均配置相机和LED灯,可通过线缆远距离操控。此前东芝也有用于反应堆内部检查的水下机器人,但这次特别开发的机器人更为轻巧,且抗辐射能力更强。
福岛第一核电站1至3号机组目前仍被持续注水冷却,安全壳底部存在大量积水,其中3号机组安全壳内部水深达6米。堆芯熔化后的核残渣仍存在于水下,有待调查,而新款水下机器人正是以福岛第一核电站为假想使用场景研究开发。
东芝公司说,新款机器人预计在今年夏天应用于3号机组,他们希望通过水下调查了解安全壳内部状况,为最终确定核残渣取出方案收集必要信息。
2011年“3·11大地震”引发核泄漏事故后,福岛第一核电站1至3号机组发生堆芯熔化,即反应堆内压力容器中的核燃料棒失去冷却后迅速升至极高温度而熔毁,并从压力容器底部泄漏到外面一层安全壳的底部。
福岛第一核电站运营方东京电力公司曾多次利用机器人调查安全壳内部状况,但进展并不顺利,多台机器人损毁在安全壳内。东电认为,机器人故障可能与超高辐射有关。
(原标题:日本开发新型水下机器人调查福岛核事故)
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