This project was years in the planning to put a higher resolution set of muon scanners into unit 2’s buildings to look for remaining reactor fuel. The set intended for unit 2 are a higher resolution set of equipment than unit 1.
Unit 2 did have a previous muon scan done by Nagoya University using their own equipment. This scan found no fuel inside unit 2’s reactor vessel but was heavily downplayed and ignored by TEPCO and the media.
TEPCO and the contractors working on this more recent muon scan for unit 2 discovered that the locations where the detectors were intended to go are too small for the detectors to fit in. Equipment would need to be removed that is currently critical to decommissioning and would be cost prohibitive. The veracity of this story is unknown as TEPCO has not provided any evidence to show this was the cause for scrapping the newer scan. There are plans to repurpose unit 1’s scanners in unit 2.
There was no explanation why measurements were not taken before the units were designed.
image credit | worth1000.com
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