To prevent radiation hazards for workers engaged in works to decontaminate soil and wastes contaminated by radioactive materials, works for collecting waste, etc. and works to dispose of nuclear accident-derived wastes, etc., discharged in the accident at the Fukushima Daiichi Nuclear Power Plant of Tokyo Electric Power Company (TEPCO) associated with the Great East Japan Earthquake (Tohoku District off the Pacific Ocean Earthquake) that occurred on 11 March 2011, (referred to as "decontamination and related works"), the Ministry of Health, Labour and Welfare has enforced the Ordinance on Prevention of Ionizing Radiation Hazards at Works to Decontaminate Soil and Wastes Contaminated by Radioactive Materials Resulting from the Great East Japan Earthquake and Related Works (Ordinance of the Ministry of Health, Labour and Welfare (MHLW) No.152 of 2011; referred to as the "Ionizing Radiation Ordinance for Decontamination") and the Ordinance on Prevention of Ionizing Radiation Hazards (Ordinance of the Ministry of Labour No.41 of 1972; referred to as the "Ionizing Radiation Ordinance"), and has established as well the Guideline on Prevention of Radiation Hazards for Workers Engaged in Decontamination and Related Works (Labour Standards Bureau Notification No. 1222-6, 22 December 2011), the Guideline on Prevention of Radiation Hazards for Workers Engaged in Works under a Designated Dose Rate (Labour Standards Bureau Notification No. 0615-6, 15 June 2012), and the Guideline on Prevention of Radiation Hazards for Workers Engaged in Nuclear Accident-derived Waste Disposal (Labour Standards Bureau Notification No.0412-6, as of 12 April 2013) and is instructing all those concerned to comply properly with these ordinances and guidelines.
The guidelines were revised as shown below in terms of factors used for the simplified radioactivity measurement of the soil etc. You are strongly requested to make those known to all concerned contractors, and prefectural and municipal authorities within your jurisdiction, and properly promote the prevention of radiation hazards during decontamination and related works, in consideration of the revised provisions.
It should be noted that the Deputy Vice-Minister of the Ministry of the Environment (MOE), the Director-General of the Environmental Management Bureau of MOE, the Director-General of the Policy Bureau of the Ministry of Land, Infrastructure, Transport and Tourism, the Director-General of the Agriculture, Forestry and Fisheries Research Council of the Ministry of Agriculture, Forestry and Fisheries, the Director-General of the Reconstruction Agency, and the Vice-Secretary General of the Team in Charge of Assisting the Lives of Disaster Victims of the Nuclear Emergency Response Headquarters of the Cabinet Office have been notified as in Annex 4, that the prefectural governors of Iwate, Miyagi, Yamagata, Fukushima, Ibaraki, Tochigi, Gunma, Saitama, Chiba, Tokyo, Niigata and Shizuoka have been notified as in Annex 5, and that related employers’ groups have been notified as in Annex 6.
(a) A medical doctor’s opinion should be sought within three months from the date of a medical examination.
(b) The opinions and observations of the medical doctor should be recorded in each employee’s personal medical examination card.
(a) A medical doctor’s opinion should be sought within three months from the date of a medical examination.
(b) The opinions and observations of the medical doctor should be recorded in each employee’s personal medical examination card.
(a) A medical doctor’s opinion should be sought within three months from the date of a medical examination.
(b) The opinions and observations of the medical doctor should be recorded in each employee’s personal medical examination card.
Measurement date | Factor X values | ||||
---|---|---|---|---|---|
V5 containers | Sandbag | Flexible containers |
200 L drum cans | 2 L polyethylene bottles | |
Until October 2014 | 3.7E+04 | 8.3E+0E | 1.1E+07 | 2.9E+06 | 1.1E+05 |
Until January 2015 | 3.8E+04 | 8.5E+05 | 1.1E+07 | 2.9E+06 | 1.1E+05 |
Until April 2015 | 3.8E+04 | 8.6E+05 | 1.1E+07 | 3.0E+06 | 1.1E+05 |
Until July 2015 | 3.9E+04 | 8.8E+05 | 1.2E+07 | 3.0E+06 | 1.1E+05 |
Until October 2015 | 3.9E+04 | 8.9E+05 | 1.2E+07 | 3.1E+06 | 1.1E+05 |
Until January 2016 | 4.0E+04 | 9.0E+05 | 1.2E+07 | 3.1E+06 | 1.2E+05 |
Until April 2016 | 4.0E+04 | 9.1E+05 | 1.2E+07 | 3.2E+06 | 1.2E+05 |
Until July 2016 | 4.1E+04 | 9.3E+05 | 1.2E+07 | 3.2E+06 | 1.2E+05 |
Until October 2016 | 4.2E+04 | 9.4E+05 | 1.2E+07 | 3.3E+06 | 1.2E+05 |
Until January 2017 | 4.2E+04 | 9.5E+05 | 1.3E+07 | 3.3E+06 | 1.2E+05 |
Until April 2017 | 4.3E+04 | 9.6E+05 | 1.3E+07 | 3.3E+06 | 1.2E+05 |
Until July 2017 | 4.3E+04 | 9.7E+05 | 1.3E+07 | 3.4E+06 | 1.2E+05 |
Until October 2017 | 4.3E+04 | 9.8E+05 | 1.3E+07 | 3.4E+06 | 1.3E+05 |
Until January 2018 | 4.4E+04 | 9.9E+05 | 1.3E+07 | 3.5E+06 | 1.3E+05 |
Attachment 6-2 Simplified procedures for measurement of radioactivity concentration of agricultural soil
0.2 x 6,260 – 327 = 925 Bq/kg (Estimated)
Zone | Type of farmland | Type of soil | Formula | Factor X | Factor Y |
---|---|---|---|---|---|
Evacuation area | Non-decontaminated farmland | A | 4,010 | 0 | |
Decontaminated farmland *3 | B | 3,590 | 0 | ||
Other areas | Rice paddy | Andosol | C | 6,260 | 327 |
Non-Andosol | D | 5,040 | 148 | ||
Agricultural field | Andosol | E | 4,720 | 185 | |
Non-Andosol | F | 3,960 | 135 | ||
Orchard・Pasture | G | 3,060 | 0 |
*1 Whether or not the soil of the farmland is an Andosol type can be checked using the soil distribution map on the webpage of the National Institute for Agro-Environmental Science (http://agrimesh.dc.affrc.go.jp/soil_db/).
*2 The conversion factors will change due to radioactivity decay with time. The estimation formula will be revised before the change becomes so large as not to be negligible.
*3 Farmland which has been deeply plowed or from which topsoil has been stripped.
Ambient Dose Rate (μSv/h) |
Cs Concentration (Bq/kg) |
Ambient Dose Rate (μSv/h) |
Cs Concentration (Bq/kg) |
Ambient Dose Rate (μSv/h) |
Cs Concentration (Bq/kg) |
---|---|---|---|---|---|
0.1 | 401 | 1.1 | 4,411 | 2.1 | 8,421 |
0.2 | 802 | 1.2 | 4,812 | 2.2 | 8,822 |
0.3 | 1,203 | 1.3 | 5,213 | 2.3 | 9,223 |
0.4 | 1,604 | 1.4 | 5,614 | 2.4 | 9,624 |
0.5 | 2,005 | 1.5 | 6,015 | 2.5 | 10,025 |
0.6 | 2.406 | 1.6 | 6,416 | 2.6 | 10,426 |
0.7 | 2,807 | 1.7 | 6,817 | 2.7 | 10,827 |
0.8 | 3,208 | 1.8 | 7,218 | 2.8 | 11,228 |
0.9 | 3,609 | 1.9 | 7,619 | 2.9 | 11,629 |
1.0 | 4,010 | 2.0 | 8,020 | 3.0 | 12,030 |
Your continued understanding and extra cooperation in the work of the Industrial Safety and Health Administration are gratefully acknowledged.
To prevent radiation hazards for workers engaged in works to decontaminate soil and wastes contaminated by radioactive materials, works for collecting waste, etc. and works to dispose of nuclear accident-derived wastes, etc., discharged in the accident at the Fukushima Daiichi Nuclear Power Plant of Tokyo Electric Power Company (TEPCO) associated with the Great East Japan Earthquake (Tohoku District off the Pacific Ocean Earthquake) that occurred on 11 March 2011, (referred to as "decontamination and related works"), the Ministry of Health, Labour and Welfare has enforced the Ordinance on Prevention of Ionizing Radiation Hazards at Works to Decontaminate Soil and Wastes Contaminated by Radioactive Materials Resulting from the Great East Japan Earthquake and Related Works (Ordinance of the Ministry of Health, Labour and Welfare (MHLW) No.152 of 2011; referred to as the "Ionizing Radiation Ordinance for Decontamination") and the Ordinance on Prevention of Ionizing Radiation Hazards (Ordinance of the Ministry of Labour No.41 of 1972; referred to as the "Ionizing Radiation Ordinance"), and has established as well the Guideline on Prevention of Radiation Hazards for Workers Engaged in Decontamination and Related Works (Labour Standards Bureau Notification No. 1222-6, 22 December 2011), the Guideline on Prevention of Radiation Hazards for Workers Engaged in Works under a Designated Dose Rate (Labour Standards Bureau Notification No. 0615-6, 15 June 2012), and the Guideline on Prevention of Radiation Hazards for Workers Engaged in Nuclear Accident-derived Waste Disposal (Labour Standards Bureau Notification No.0412-6, as of 12 April 2013) and is instructing all those concerned to comply properly with these ordinances and guidelines.
The guidelines were revised as shown below in terms of factors used for the simplified radioactivity measurement of the soil etc.
You are strongly requested to make those known to all concerned contractors as well as self-employed workers, residents and volunteers who are engaged in decontamination and related works or works under a designated dose rate to which the Ionizing Radiation Ordinance for Decontamination does not apply, in consideration of the revised provisions.
Your continued understanding and extra cooperation in the work of the Industrial Safety and Health Administration are gratefully acknowledged.
To prevent radiation hazards for workers engaged in works to decontaminate soil and wastes contaminated by radioactive materials, works for collecting wastes, etc. and works to dispose of nuclear accident-derived wastes, etc., discharged in the accident at the Fukushima Daiichi Nuclear Power Plant of Tokyo Electric Power Company (TEPCO) associated with the Great East Japan Earthquake (Tohoku District off the Pacific Ocean Earthquake) that occurred on 11 March 2011, (referred to as "decontamination and related works"), the Ministry of Health, Labour and Welfare has enforced the Ordinance on Prevention of Ionizing Radiation Hazards at Works to Decontaminate Soil and Wastes Contaminated by Radioactive Materials Resulting from the Great East Japan Earthquake and Related Works (Ordinance of the Ministry of Health, Labour and Welfare (MHLW) No.152 of 2011; referred to as the "Ionizing Radiation Ordinance for Decontamination") and the Ordinance on Prevention of Ionizing Radiation Hazards (Ordinance of the Ministry of Labour No.41 of 1972; referred to as the "Ionizing Radiation Ordinance"), and has established as well the Guideline on Prevention of Radiation Hazards for Workers Engaged in Decontamination and Related Works (Labour Standards Bureau Notification No. 1222-6, 22 December 2011), the Guideline on Prevention of Radiation Hazards for Workers Engaged in Works under a Designated Dose Rate (Labour Standards Bureau Notification No. 0615-6, 15 June 2012), and the Guideline on Prevention of Radiation Hazards for Workers Engaged in Nuclear Accident-derived Waste Disposal (Labour Standards Bureau Notification No.0412-6, as of 12 April 2013) and is instructing all those concerned to comply properly with these ordinances and guidelines.
The guidelines were revised as shown below in terms of factors used for the simplified radioactivity measurement of the soil etc.
You are strongly requested to make those known to municipal authorities within your jurisdiction, in consideration of the revised provisions.
Separate sheet (List of Prefectural Governors)
Your continued understanding and extra cooperation in the work of the Industrial Safety and Health Administration are gratefully acknowledged.
To prevent radiation hazards for workers engaged in works to decontaminate soil and wastes contaminated by radioactive materials, works for collecting wastes, etc. and works to dispose of nuclear accident-derived wastes, etc., discharged in the accident at the Fukushima Daiichi Nuclear Power Plant of Tokyo Electric Power Company (TEPCO) associated with the Great East Japan Earthquake (Tohoku District off the Pacific Ocean Earthquake) that occurred on 11 March 2011, (referred to as "decontamination and related works"), the Ministry of Health, Labour and Welfare has enforced the Ordinance on Prevention of Ionizing Radiation Hazards at Works to Decontaminate Soil and Wastes Contaminated by Radioactive Materials Resulting from the Great East Japan Earthquake and Related Works (Ordinance of the Ministry of Health, Labour and Welfare (MHLW) No.152 of 2011; referred to as the "Ionizing Radiation Ordinance for Decontamination") and the Ordinance on Prevention of Ionizing Radiation Hazards (Ordinance of the Ministry of Labour No.41 of 1972; referred to as the "Ionizing Radiation Ordinance"), and has established as well the Guideline on Prevention of Radiation Hazards for Workers Engaged in Decontamination and Related Works (Labour Standards Bureau Notification No. 1222-6, 22 December 2011), the Guideline on Prevention of Radiation Hazards for Workers Engaged in Works under a Designated Dose Rate (Labour Standards Bureau Notification No. 0615-6, 15 June 2012), and the Guideline on Prevention of Radiation Hazards for Workers Engaged in Nuclear Accident-derived Waste Disposal (Labour Standards Bureau Notification No.0412-6, as of 12 April 2013) and is instructing all those concerned to comply properly with these ordinances and guidelines.
The guidelines were revised as shown below in terms of factors used for the simplified radioactivity measurement of the soil etc.
You are requested to make those known to your group members and properly promote the prevention of radiation hazards during decontamination and related works, in consideration of the revised provisions.
Separate sheet (List of the employers’ groups)