JAIF has reported radiation measurements within the plant and at the plant perimeter.
North of Service Building:
3054.0 μSv/h at 15:00, Mar. 20 (02:00:00 Sunday March 20 ET)
For a Canadian nuclear energy worker 17 hours of exposure to this level of radiation is equivalent to the annual permissable exposure of 50 mSv.
Previously reported radiation levels
at the plant’s headquarters building, located some 500 meters northeast of Unit 3,
2,625 μSv/hr at 8:30 on Sunday morning (19:30:00 Saturday March 19 ET).
~3,400 μSv/hr at 2:30 pm Saturday (01:30:00 a.m. Saturday March 19 ET)
500 meters northwest of the Fukushima Daiichi plant on Friday Mar 18 JST afternoon,
- 1:50 PM 3,484 μSv/hr (12:50:00 a.m. Friday March 18 ET)
- 2:50 PM 3,339 μSv/hr (1:50:00 a.m. Friday March 18 ET)
Radiation levels measured at the West Gate ( 1.1 kilometers west of Unit 3 )
269.5 μSv/h at 05:40, Mar. 20 (04:40 p.m. Saturday March 19 ET)
Previously reported radiation levels at the west gate
364.5 μSv/hr at 9:00 AM Mar 19 (20:00:00 Friday March 18 ET)
830.8 μSv/hr at 8:10 AM Mar 19 (19:10:00 Friday March 18 ET)
271 μSv/hr at 7:30 AM Mar 18 (06:30 p.m. Thursday March 17 ET)
289 μSv/hr at 11pm Mar 17 (10:00:00 a.m. Thursday March 17 ET)
292 μSv/hr at 8:40pm Mar 17 (07:40:00 a.m. Thursday March 17 ET)
646.2μSv/h at 11:10am Mar. 17 (10:10 p.m. Wednesday March 16 ET)
1472μSv/h at 16:20, Mar 16 (03:20 am Wednesday March 16 ET)
Radiation reading at the plant east gate
304 μSv/h at 03:30, Mar. 19 (02:30:00 p.m. Friday March 18 ET)
287 μSv/h at 12:00, Mar. 18 (23:00:00 Thursday March 17 ET)

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