Asahi: “Radioactive material may be flowing differently” at Fukushima Unit 1 — Survey results opposite of what Tepco expected

Published: October 11th, 2012 at 1:03 pm ET
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(Subscription Only) Title: Despite more water, radiation still high in Fukushima reactor
Source: THE ASAHI SHIMBUN
Date: October 11, 2012
Emphasis Added

Source: Tepco (Click to enlarge)

[...] Questions also remained about the location of the melted fuel.The maximum radiation level of 11.1 sieverts per hour was detected at a height of 8.6 meters from the bottom of the containment vessel.

Radiation levels generally fell toward the lower parts of the containment vessel. [...]

[Masayuki Ono, acting general manager of TEPCO’s Nuclear Power and Plant Siting Division] said it is difficult to identify where the source of radiation is from the available data.

The company believed that almost all melted fuel fell through the bottom of the pressure vessel and accumulated in the outer containment vessel. Under that scenario, radiation levels would rise toward the bottom of the containment vessel. [...]

TEPCO said radioactive materials may be flowing differently in the two reactors. The No. 1 reactor was successfully vented, while the No. 2 reactor was not.

This website first reported the radiation dose inside the Unit 1 containment vessel increased as elevation increased: Mystery Continues: 'Difficult to determine' location of melted fuel during Unit 1 investigation, says Tepco -- Radiation dose highest at top of containment vessel

Published: October 11th, 2012 at 1:03 pm ET
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18 comments

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