On October 9,
2013, the Nuclear Regulatory Agency published the FY2012 report on the
management of worker radiation exposure at nuclear power facilities.
http://www.nsr.go.jp/committee/kisei/data/0026_03.pdf (in Japanese)
Table 1 shows the data on radiation dose management
for workers in nuclear reactor buildings of nuclear power plants, based
on the report’s data for “management of radioactive wastes and
management of radiation doses of workers engaged in radiation-related
jobs at nuclear reactor facilities for generating power for commercial
use and those for generating power for research and development,”
during the period from April 2012 through March 2013.
Previously, the data for Tokyo Electric Power Company’s (TEPCO)
Fukushima Daiichi Nuclear Power Station and the Fukushima Daini Nuclear
Power Station remained un-submitted, due to “a delay in dosage
calculation by TEPCO’s subcontractors caused by the negative effects of
the 2011 Great East Japan Earthquake.” The data was finally submitted
on April 26, 2013.
Table 2 shows the revised report published on July
5. Earlier, the Ministry of Health, Labor and Welfare closely examined
the internal exposure data in the original report in response to
complaints from the World Health Organization and other international
organizations about the data. As a result, the ministry discovered that
there were a number of discrepancies between the data presented by
TEPCO and those from its subcontractors. The revised July 5 report
contains the re-calculations of the data.
The number of workers at the Fukushima Daiichi
Nuclear Power Station who suffered a cumulative radiation exposure of
20 mSv annually totaled 738, consisting of 63 TEPCO employees and 675
subcontractor employees. The maximum annual radiation dose registered
by workers stood at 54.1mSv.
Table 3 shows the distribution of annual radiation
dose registered by the workers at the Fukushima Daiichi Nuclear Power
Station each fiscal year, published by TEPCO. According to our
calculations, the workers’ combined exposure doses for March 2011,
FY2011, and FY2012 reached an enormously high level of approximately
341 man-Sv. Of these, about 73 percent are doses registered by
subcontractor employees.
In most Western countries and South Korea, the
central government has the responsibility for managing the radiation
doses of workers at nuclear power facilities. In Japan, however, the
subcontractors that employ such workers are expected to take
responsibility for this. The government is doing nothing except collect
the data from the subcontractors. Even after the nuclear accident in
Fukushima on March 11, 2011, it is not TEPCO but the subcontractors who
are required to manage worker radiation dose and worker health.It is
still unclear how the major subcontractors evaluated the radiation
doses of the workers employed by the lower and lowest level
subcontractors.
Amid the confusion in the wake of the nuclear
accident, there was a serious shortage of dosimeters for individual
workers. Moreover, many workers lied about their doses, fearing that
they might be fired once their doses exceeded the official limit. These
incidents indicate that the published data do not correctly reflect the
true situation on radiation doses. For many years, we have strongly
insisted on the need for the government to unify the management of
exposure doses of workers engaged in radiation-related work and take
strict responsibility for data management. We called for the creation
of such a system even before the March 11 nuclear accident, but the
government has thus far totally failed to take the necessary measures.
(Mikiko Watanabe, CNIC)
| Plant |
Attribution |
Dose level [per
person] |
Collective effective
dose |
Average effective dose |
Maximum effective dose |
～
5mSv |
5mSv |
10mSv |
15mSv |
20mSv |
25mSv |
30mSv |
35mSv |
40mSv |
45mSv |
50mSv
～ |
| ～ |
～ |
～ |
～ |
～ |
～ |
～ |
～ |
～ |
| 10mSv |
15mSv |
20mSv |
25mSv |
30mSv |
35mSv |
40mSv |
45mSv |
50mSv |
（man・Sv) |
(mSv) |
(mSv) |
| Tokai |
Power Company |
309 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.00 |
0.0 |
0.6 |
| Subcontractor |
1016 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.07 |
0.1 |
4.5 |
| Total |
1325 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.07 |
0.1 |
4.5 |
| Tokai-2 |
Power Company |
354 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.04 |
0.1 |
2.2 |
| Subcontractor |
2092 |
2 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.32 |
0.2 |
5.7 |
| Total |
2446 |
2 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.36 |
0.1 |
5.7 |
| Tsuruga |
Power Company |
439 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.02 |
0.1 |
1.3 |
| Subcontractor |
2360 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.30 |
0.1 |
5.4 |
| Total |
2799 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.32 |
0.1 |
5.4 |
| Onagawa |
Power Company |
479 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.01 |
0.0 |
0.9 |
| Subcontractor |
3479 |
43 |
4 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1.10 |
0.3 |
12.1 |
| Total |
3958 |
43 |
4 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1.12 |
0.3 |
12.1 |
| Higashidori |
Power Company |
289 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.00 |
0.0 |
0.1 |
| Subcontractor |
747 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.01 |
0.0 |
1.1 |
| Total |
1036 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.01 |
0.0 |
1.1 |
| Fukushima-1 |
Power Company |
1165 |
266 |
90 |
39 |
23 |
16 |
9 |
10 |
2 |
2 |
1 |
7.30 |
4.5 |
54.1 |
| Subcontractor |
7567 |
1875 |
1231 |
769 |
254 |
206 |
95 |
104 |
16 |
0 |
0 |
71.51 |
5.9 |
43.1 |
| Total |
8732 |
2141 |
1321 |
808 |
277 |
222 |
104 |
114 |
18 |
2 |
1 |
78.81 |
5.7 |
54.1 |
| Fukushima-2 |
Power Company |
642 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.06 |
0.1 |
1.5 |
| Subcontractor |
2452 |
17 |
6 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.71 |
0.3 |
17.2 |
| Total |
3094 |
17 |
6 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.77 |
0.2 |
17.2 |
Kashiwazaki
-kariwa |
Power Company |
1150 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.10 |
0.1 |
4.3 |
| Subcontractor |
4965 |
31 |
3 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.51 |
0.3 |
11.4 |
| Total |
6115 |
31 |
3 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.61 |
0.3 |
11.4 |
| Hamaoka |
Power Company |
791 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.06 |
0.1 |
3.0 |
| Subcontractor |
3980 |
38 |
15 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1.45 |
0.4 |
15.0 |
| Total |
4771 |
38 |
15 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1.51 |
0.3 |
15.0 |
| Shika |
Power Company |
401 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.01 |
0.0 |
0.6 |
| Subcontractor |
1174 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.11 |
0.1 |
2.5 |
| Total |
1575 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.12 |
0.1 |
2.5 |
| Shimane |
Power Company |
527 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.02 |
0.0 |
1.5 |
| Subcontractor |
2117 |
67 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1.32 |
0.6 |
7.6 |
| Total |
2644 |
67 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1.34 |
0.5 |
7.6 |
| Tomari |
Power Company |
417 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.01 |
0.0 |
1.9 |
| Subcontractor |
2181 |
20 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.54 |
0.2 |
8.3 |
| Total |
2598 |
20 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.55 |
0.2 |
8.3 |
| Mihama |
Power Company |
457 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.02 |
0.0 |
1.0 |
| Subcontractor |
2314 |
7 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.50 |
0.2 |
6.3 |
| Total |
2771 |
7 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.52 |
0.2 |
6.3 |
| Takahama |
Power Company |
517 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.03 |
0.1 |
1.0 |
| Subcontractor |
2938 |
16 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.88 |
0.3 |
9.0 |
| Total |
3455 |
16 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.91 |
0.3 |
9.0 |
| Ohi |
Power Company |
516 |
4 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.20 |
0.4 |
7.9 |
| Subcontractor |
2636 |
46 |
3 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1.24 |
0.5 |
12.0 |
| Total |
3152 |
50 |
3 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1.44 |
0.4 |
12.0 |
| Ikata |
Power Company |
350 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.01 |
0.0 |
0.7 |
| Subcontractor |
1662 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.16 |
0.1 |
2.8 |
| Total |
2012 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.17 |
0.1 |
2.8 |
| Genkai |
Power Company |
523 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.01 |
0.0 |
1.1 |
| Subcontractor |
2348 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.38 |
0.2 |
5.3 |
| Total |
2871 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.39 |
0.1 |
5.3 |
| Sendai |
Power Company |
293 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.01 |
0.0 |
0.8 |
| Subcontractor |
1390 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.13 |
0.1 |
2.5 |
| Total |
1683 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.14 |
0.1 |
2.5 |
Commercial
plant total |
Power Company |
9619 |
270 |
90 |
39 |
23 |
16 |
9 |
10 |
2 |
2 |
1 |
7.91 |
0.8 |
54.1 |
| Subcontractor |
47418 |
2164 |
1262 |
770 |
254 |
206 |
95 |
104 |
16 |
0 |
0 |
82.24 |
1.6 |
43.3 |
| Total |
57037 |
2434 |
1352 |
809 |
277 |
222 |
104 |
114 |
18 |
2 |
1 |
90.16 |
1.4 |
54.1 |
| |
| Fugen |
Power Company |
116 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.01 |
0.1 |
2.8 |
| Subcontractor |
402 |
5 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.13 |
0.3 |
9.4 |
| Total |
518 |
5 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.15 |
0.3 |
9.4 |
| Monju |
Power Company |
368 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.00 |
0.0 |
0.0 |
| Subcontractor |
869 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.00 |
0.0 |
0.0 |
| Total |
1237 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.00 |
0.0 |
0.0 |
| Total |
Power Company |
10103 |
270 |
90 |
39 |
23 |
16 |
9 |
10 |
2 |
2 |
1 |
7.92 |
0.7 |
54.1 |
| Subcontractor |
48689 |
2169 |
1262 |
770 |
254 |
206 |
95 |
104 |
16 |
0 |
0 |
82.37 |
1.5 |
43.4 |
| Total |
58792 |
2439 |
1352 |
809 |
277 |
222 |
104 |
114 |
18 |
2 |
1 |
90.31 |
1.4 |
54.1 |
|
Table1;
FY2012 data on radiation exposure of workers at nuclear-reactor
facilities for power generation (including Fugen and Monju)
|
| |
Fukushima-1 |
Fukushima-2 |
| Fiscal 2010 |
Fiscal 2011 |
Fiscal 2010 |
Fiscal 2011 |
| Total number of workers |
Power Company |
1936 |
2903 |
1485 |
1155 |
| Subcontractor |
12127 |
16993 |
6422 |
3634 |
| Total |
14063 |
19896 |
7907 |
4789 |
| Collective effective dose（man・Sv) |
Power Company |
53.66 |
32.01 |
0.39 |
0.18 |
| Subcontractor |
59.14 |
145.54 |
4.43 |
1.86 |
| Total |
112.8 |
177.56 |
4.82 |
2.04 |
| Average effective dose（mSv) |
Power Company |
27.7 |
11 |
0.3 |
0.2 |
| Subcontractor |
4.9 |
8.6 |
0.7 |
0.5 |
| Total |
8 |
8.9 |
0.6 |
0.4 |
|
Table2; Unsubmitted data for TEPCO’s Fukushima Daiichi and Daini Nuclear Power Stations
・Data for the Daiichi Nuclear Power Station was submitted on April 26, 2013 and a revised version submitted on July 5, 2013.
・The revised version of the FY2010 data for the Dai-ni Nuclear Power
Station was submitted by TEPCO’s subcontractors on Jan. 18, 2013.
The report on the FY2011 data was under scrutiny on the same day.
|
| Level
(mSv) |
～1 |
1 |
5 |
10 |
20 |
50 |
75 |
100 |
150 |
200 |
250
～ |
Maximum effective dose |
Average effective dose |
| ～ |
～ |
～ |
～ |
～ |
～ |
～ |
～ |
～ |
| 5 |
10 |
20 |
50 |
75 |
100 |
150 |
200 |
250 |
| From March 2011 to end FY2011 |
Power Company |
796 |
559 |
365 |
491 |
925 |
263 |
179 |
118 |
24 |
1 |
6 |
678.80 |
24.78 |
| Subcontractor |
4672 |
4623 |
2555 |
2886 |
2654 |
256 |
64 |
20 |
2 |
2 |
0 |
238.42 |
10.01 |
| FY2012 |
Power Company |
586 |
579 |
266 |
129 |
62 |
1 |
0 |
0 |
0 |
0 |
0 |
54.10 |
4.50 |
| Subcontractor |
4241 |
3326 |
1875 |
2000 |
675 |
0 |
0 |
0 |
0 |
0 |
0 |
43.30 |
5.90 |
|
Table3;
Distribution of radiation dose for Fukushima Daiichi Nuclear Power
Station workers for each fiscal year. Published by TEPCO
|
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