Information on Radiation at Ibaraki’s Ports
(updated – May 21, 2012)

We have collected data on the radiation dosage in the atmosphere and ocean water in the areas near the ports of Ibaraki Prefecture.
There is no health risk from the amount of radiation measured at any of the ports.

Radiation in the Atmosphere 　　　　　　　　　　　May 21, 2012 (Mon.), 12PM

Port		Atmospheric Radiation (unit: μSv/h)
Ibaraki Port	Hitachi District	0.125
	Hitachinaka District	0.088
	Oarai District	0.075
Kashima Port		0.089

*Atmospheric radiation is being measured at each of the locations below.
Hitachi Port District → Hitachi-shi Kuji
Hitachinaka Port District → Hitachinaka-shi Ajigaura
Oarai Port District → Oarai-machi Isohama (Prefectural Homepage)
Kashima Port → Kashima Port Office
(reference 1) The radioactivity value of one chest x-ray is 50 microsievert (μSv)
(reference 2) 1000 nanosievert (nSv) = 1 microsievert (μSv) = 0.001 millisievert (mSv)

Radiation in Ocean Waters April 26 2012 (Thu.)

Port			Ocean Water (unit: Bq/l)
			Iodine131(40)	Cesium134(60)	Cesium137(90)
Ibaraki Port	Hitachi District	Ocean surface	Not detected	Not detected	Not detected
		Below ocean surface
	Hitachinaka District	Ocean surface	Not detected	Not detected	Not detected
		Below ocean surface
	Oarai District	Ocean surface	Not detected	Not detected	Not detected
		Below ocean surface
Kashima Port ※Monitoring　date: April 25		Ocean surface	Not detected	Not detected	Not detected
		Below ocean surface

*The value in bold print inside the parenthesis is the standard value as stipulated by the Nuclear Reactor Regulation Law (legal limit)

*Radiation in ocean waters is being measured at each of the locations below.
Hitachi and Hitachinaka Port Districts → waters off the coast of Kujihama
Oarai Port District → waters off the coast of Oarai-machi
Kashima Port → waters off the coast of Hirai (From the TEPCO Ibaraki Branch Homepage (Japanese))
*Depth of the monitoring point below ocean surface
Hitachi･Hitachinaka District：25.0m Oarai District：15.5m Kashima Port：20.5m

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Management Group
Ports and Harbors Division
Department of Public Works
Ibaraki Prefectural Government
029-301-4521