Radiation doses from river facilities (such as hydrophilic bases)

• Measurement contents
  The measurement was given priority to the hydrophilic base where children play and the activities of the waterside protection society.

1. General space radiation dose
   At 1-2 central locations such as hydrophilic bases, spatial gamma doses were measured at 50 cm and 1 meter above the ground surface.

2. Radiation doses at locations that may become microspots
   In facilities such as hydrophilic bases, gamma doses of 1 cm, 50 cm and 1 meter were measured at places where there could be micro spots.

• About measuring instruments
  The following two types of measuring instruments are used for measurement.
  TCS-172B (manufactured by Hitachi Aloka Medical, Ltd.)
  Detector NaI (TI) scintillation detector
  Mr. GammaA2700 type (manufactured by Clear Pulse)
  Detector CsI (TI) scintillation detector

・Re-measurement results (PDF: 61KB)
・Radiation dose of river bottom quality of hydrophilic base and radioactive material of river water (PDF: 88KB)

If you have any requests for measurement of facilities managed by Public Works Office, please contact the Public Works Office of each district.
→Public Works Office list page
・We can read radiation-related information of Motoichi on the next page.
→Radiation-related information page
・"About places where radiation dose higher than the surrounding area was measured (so-called micro spots)", you can view it on the next page.
→Health and Social Welfare Bureau Health and Safety Division page