An assessment of radiation doses at an educational institution 57.8 km away from the Fukushima Daiichi nuclear power plant 1 month after the nuclear accident

Table 2 Results of outdoor radiation measurements at 100 cm above the ground surface at our educational institution in Fukushima

Measurement site	Surface properties	Radiation dose rate (μSv/h)				Count rate (cpm)
Measurement site	Surface properties	Maximum	Minimum	Mean	SD	Maximum	Minimum	Mean	SD
Track field (n = 12)	Grass, soil	3.18	2.72	2.95	0.16	1864	1392	1603	158
Baseball field (n = 10)	Grass, soil	2.70	1.72	2.25	0.32	1609	953	1320	221
Tennis courts (n = 7)	Artificial turf	2.39	2.05	2.21	0.15	1230	1093	1179	49
Inner courtyard (n = 5)	Grass, asphalt	2.85	1.32	1.84	0.59	1295	830	956	194
Parking lot 1 (n = 7)	Asphalt	1.53	1.07	1.36	0.15	1105	728	941	116
Parking lot 2 (n = 10)	Asphalt	1.72	0.88	1.32	0.23	1109	720	925	112
Parking lot 3 (n = 3)	Asphalt	1.15	0.82	1.01	0.17	857	556	731	157
Road (n = 3)	Asphalt	1.77	1.42	1.57	0.18	1045	742	906	153
Mean ± SD		1.98 ± 0.69				1162 ± 317

ISSN: 1347-4715