Investigation by CRMS Citizen's Radioactivity Measuring Station and its protective measures taken
On Sunday July 8, 2012 from 1 to 4 PM, a local group called "the Association to Restore Clean Oguni from Radioactive Contamination" and a few members of the Parent-Teacher Association took radiation readings around the school. The survey confirmed the effect of the decontamination work done on the school ground. However, the survey also found hot spots scattered around, including the school bus boarding area and from there to the main gate of the school, alongside the school ground, south and east sides of the swimming pool, and behind the gymnasium. In order to ensure the safety, bamboo sticks wrapped around in red tape were put up at these locations, and the students were warned not to go near them.
Investigation by the School Facilities Department and its protective measures taken
On Wednesday September 12, 2012, the Department of School Facilities conducted a hot spot survey. They checked the street gutters and draining ditches in the area east of the school, near the sundial. (Usually nobody would go there due to high grass.)
Immediately, one day later, workers came and removed the sand from the gutters and ditches, and shielded the mount of sand stored in a corner of the school ground. As a result, the radiation level went down from 179μSv/h to 3.9μSv/h. The radiation level is very high in this hot spot where the mud and sand from the ditches is stocked in one location. A sign prohibiting the entry was placed, and the students were instructed not to go close to them.
This article is extracted from the CRMS report: