On 22 May 2011, TEPCO imaged the inside of Unit 1 with visible light and gamma-ray cameras. Here are a couple of photos from that expedition. Desdemona wonders if the pixel noise in the visible-light images is caused by gamma rays hitting the camera’s image sensor.   Inside the Reactor Building, Unit 1, Fukushima Daiichi Nuclear Power Station. View from the large equipment service entrance to the south-side airlock, 22 May 2011. TEPCO

Inside the Reactor Building, Unit 1, Fukushima Daiichi Nuclear Power Station. View from the large equipment service entrance to the south-side airlock, 22 May 2011. TEPCO

  Inside the Reactor Building, Unit 1, Fukushima Daiichi Nuclear Power Station. Gamma camera view from the large equipment service entrance to the south-side airlock, 22 May 2011. Measurement unit is counts per second (cps). TEPCO

Inside the Reactor Building, Unit 1, Fukushima Daiichi Nuclear Power Station. Gamma camera view from the large equipment service entrance to the south-side airlock, 22 May 2011. Measurement unit is counts per second (cps). TEPCO

  Inside the Reactor Building, Unit 1, Fukushima Daiichi Nuclear Power Station. View around the large equipment service entrance, 22 May 2011. TEPCO

Inside the Reactor Building, Unit 1, Fukushima Daiichi Nuclear Power Station. View around the large equipment service entrance, 22 May 2011. TEPCO

  Inside the Reactor Building, Unit 1, Fukushima Daiichi Nuclear Power Station. Gamma camera view around the large equipment service entrance, 22 May 2011. TEPCO

Inside the Reactor Building, Unit 1, Fukushima Daiichi Nuclear Power Station. Gamma camera view around the large equipment service entrance, 22 May 2011. Measurement unit is counts per second (cps). TEPCO

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