We show where the varied radiation levels have been recorded in unit 1 in the diagram below. [...] The readings in this area go higher the lower you go and closer to the center of the east side of the torus room.
The highest readings found so far were taken when workers dropped a scope through a floor hole into the torus room on the west side of the building. The lower the scope went the higher the radiation levels. TEPCO found the radiation level in the bottom of the torus room under water to be 100,000 to 1,000,000 Sv/h on the west side. Yet the radiation levels on the first floor on that side are low compared to the radiation levels on the east side of the first floor. This indicates that the torus room readings on the east side if available would be even higher than those very high readings found on the west side of the torus room. TEPCO has not attempted the same inspection on the east side as the 1st floor levels are too high to send workers in.
June 27, 2012 Tepco Handout: “Indicated order values of 10^8 – 10^9″ (100,000,000 – 1,000,000,000 millisieverts per hour OR 100,000 – 1,000,000 sieverts per hour)
Published: October 16th, 2012 at 2:17 am ET
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- Tepco finds 920 millisieverts per hour in Fukushima Unit 1 torus room — Gundersen: “There are fuel fragments outside the containment” February 20, 2013
- “Very Unexpected”: Large debris filmed in Fukushima Unit 1 shows something explosive happened inside containment (VIDEO) September 27, 2012
- New indoor radiation dose record at Fukushima — 5 sieverts per hour detected at Reactor No. 1 — May be higher as it exceeded capacity of measuring device August 2, 2011
- NYT: Fatal Radiation Level Found at Fukushima — “Exceeded” 10 sieverts per hour, measuring device was maxed out August 2, 2011