Radiation levels inside the damaged Fukushima nuclear reactor are over 100 times fatal levels, the highest they've been since the triple meltdown in March, 2011, according to operator Tepco. The company recently sent a camera-equipped robot into the reactor, which relayed images showing a meter-wide hole in the pressure vessel (above), with possible melted uranium fuel on a grating below. "It may have ... melted and made a hole in the [containment] vessel, but it is only a hypothesis at this stage," a company spokesperson told the AFP. Since the accident, the highest recorded level in the plant was around 73 sieverts per hour, but a new reading, estimated from a camera that was sent in on Monday, shows an "unimaginable" 530 sieverts per hour, according to an expert. A dose of one sievert can cause radiation sickness, while 10 sieverts would kill you in a few weeks.