Radioisotope Center {փWv
Radioisotope Center

Since the enormous earthquake hit the northeast area of Japan, we started to monitor the radiation dose rates on our campus, and opened the results to the public.

The radiation dose rates are monitored everyday at the following spots @, A, B and C at Nagaoka University of Technology.
*The readings at point C are measured by pocket dosimeter. (average dose per hour)
Since April 11, we have reported only the pocket dosimeter readings at point C, since all the values determined at the four points so far have been similar and lower than usual levels.
Radiation dose rates (microsieverts per hour)
The table indicates radiation dose rates in air at the spots, and the values are shown as microsieverts/hour (Sv/h).
The recommended maximum radiation dose rate in a place of daily life is
250 Sv/3 months.

Date Point @ Point A Point B Point C
4/1
11:30-12:30
0.05 0.05 0.06 -
4/2
11:30-12:30
0.04 0.05 0.06 0.08
4/3
11:30-12:30
0.05 0.05 0.05 0.08
4/4
11:30-12:30
0.05 0.05 0.05 0.08
4/5
11:30-12:30
0.05 0.06 0.06 0.08
4/6
11:30-12:30
0.05 0.06 0.06 0.04
4/7
11:30-12:30
0.06 0.06 0.06 0.08
4/8
11:30-12:30
0.05 0.06 0.06 0.04
4/9
11:30-12:30
0.07 0.07 0.07 0.08
4/10
11:30-12:30
0.06 0.06 0.06 0.08
4/11 14:00
- - - 0.08
4/12 14:00
- - - 0.04
4/13 14:00
- - - 0.08
4/14 14:00
- - - 0.08
4/15 14:00
- - - 0.08
4/16 14:00
- - - 0.04
4/17 14:00
- - - 0.08
4/18 14:00
- - - 0.08
4/19 14:00
- - - 0.08
4/20 14:00
- - - 0.08
4/21 14:00
- - - 0.08
4/22 14:00
- - - 0.04
4/23 14:00
- - - 0.08
4/24 14:00
- - - 0.08
4/25 14:00
- - - 0.08
4/26 14:00
- - - 0.08
4/27 14:00
- - - 0.08
4/28 14:00
- - - 0.08
4/29 14:00
- - - 0.04
4/30 14:00
- - - 0.08

Usual levels measured are between 0.05-0.07 Sv/h.
Usual levels measured with the pocket dosimeter are between 0.04-0.08 Sv/h.
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