Home > Site Information > Monitoring radiation at all Sites of NIMS in 2011

Results for Sep. 2011 - Dec. 2011

We have been monitoring the radiation dose rate at NIMS Sengen-site since the accident at Fukushima nuclear power plant No.1. We have now started to measure the air radiation dose rate at all sites of NIMS including Sengen-site, Namiki-site, and Sakura-site.

Monitoring Data

µSv/h (Micro sievert/hour; 1 micro sievert = 1/1000 milli sievert)

2011

Date Weather Time Ground height Sakura-site Sengen-site Namiki-site
Dec. 28 Sunny 7°C 13:50-14:55 0cm 0.13 0.20 0.21
 50cm 0.11 0.16 0.19
 100cm 0.10 0.15 0.17
Dec. 14 Cloud, 11°C 14:00-15:00 0cm 0.14 0.20 0.23
 50cm 0.12 0.16 0.18
 100cm 0.11 0.16 0.18
Dec. 1 Cloud, 7°C 11:20-12:20 0cm 0.15 0.20 0.23
 50cm 0.12 0.17 0.16
 100cm 0.11 0.15 0.18
Nov. 18 Cloud, 15°C 10:00-11:00 0cm 0.14 0.20 0.22
 50cm 0.11 0.18 0.19
 100cm 0.11 0.16 0.17
Nov. 2 Sunny, 20°C 13:00-14:00 0cm 0.14 0.22 0.23
 50cm 0.10 0.17 0.18
 100cm 0.10 0.15 0.18
Oct. 20 Sunny, 18°C 13:00-14:00 0cm 0.15 0.22 0.24
 50cm 0.11 0.18 0.20
 100cm 0.11 0.18 0.20
Oct. 6 Sunny, 24°C 12:00-13:00 0cm 0.15 0.23 0.23
 50cm 0.12 0.18 0.17
 100cm 0.11 0.17 0.16
Sep. 22 Sunny, 25°C 10:30-11:30 0cm 0.14 0.21 0.24
 50cm 0.11 0.16 0.20
 100cm 0.11 0.14 0.19


About monitoring condition

Because the measuring method and instrument are different from that of Sengen-site mentioned above, we will put the monitoring data separately on this page.

Monitoring Place

Sengen-site (on the lawn outdoor)
Namiki-site (on the lawn outdoor)
Sakura-site (on the lawn outdoor)

Measuring Method

Instrument Nal(Tl) scintillation survey meter, ALOKA TCS-172B
Dose rate values including background level of 0.06µSv/h
Monitoring cycle in every two weeks at random times.
Measuring height 0cm, 50cm, 100cm at ground height

Measurement person

Quantum Beam Unit and Nano Characterization Unit of Advanced Key Technologies Division are involved with this measurement of air radiation dose rate.


2015
Results for 2015
2014
Results for 2014
2013
Results for 2013
2012
Results for 2012
2011
Results for Sep. 2011 - Dec. 2011

National Institute for Materials Science (NIMS)
1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, JAPAN
TEL.+81-(0)-29-859-2000
FAX.+81-(0)-29-859-2029