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Announcement on leakage of radioactive materials


A crack was found in a portion of the drainage pipes for water used in tertiary cleaning of radio isotopes (RI) in a RI handling facility at Osaka University during voluntary inspections. A leakage of radioactive materials was confirmed after a survey of the surrounding soil. A report was submitted to the Secretariat of the Nuclear Regulation Authority, and immediate response was taken.

The provisional soil pollution levels stand at a few Bq/g of cesium 137 and a few tenths of a Bq/g of manganese 54. Both of these values are under the minimum concentration levels for soil contamination (both 10 Bq/g)*, meaning these levels of contamination are thought to have no effects on the human body or the environment.

*Concentration levels which required handling as radioactive isotopes as stipulated in the Act on Prevention of Radiation Hazards due to Radioisotopes, etc.

Related link

Announcement on leakage of radioactive materials (2) [March 16, 2016]

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