Radiation dose from river facilities (water facilities, etc.)

• Measurement contents
  Priority was given to hydrophilic bases where children play and places of activities of the waterside protection society.

1. General spatial radiation dose
   Spatial gamma doses of 50 cm and 1 meter at the surface of the ground were measured at 1-2 central places such as hydrophilic bases.

2. Radiation dose at locations that may become microspots
   Gamma doses of 1 cm, 50 cm and 1 meter were measured at places that could become microspots in facilities such as hydrophilic bases.

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

・Remeasurement results (PDF: 61KB)
・Measurement results of radiation dose of river bottom at hydrophilic bases and radioactive materials in river water (PDF: 88KB)

If you have any requests for measurement of facilities managed by Public Works Office, please contact Public Works Office in 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 microspots)" can be viewed on the next page.
→Page of Health and Social Welfare Bureau Health and Safety Division