Interviews
Sampling survey results on radioactivity levels in textile products
15 Jun '11
3 min read
In connection with the accident at the TEPCO's Fukushima Dai-ichi Nuclear Power Station, the Ministry of Economy, Trade and Industry (METI) carried out a sampling survey of radioactivity levels in textile products produced in various parts of Japan and the world in order to ascertain the impact of radioactivity in Japanese textile products.
As a result, radioactivity levels significantly higher than background radiation level were detected in none of the samples and no significant differences in radioactivity level were found between the places of production of samples (both between different places in Japan and between places in Japan and those outside Japan).
Following the accident at the TEPCO's Fukushima Dai-ichi Nuclear Power Station, METI realized the need to assess the impact of radiation on Japanese textile products. For this reason, METI performed a sampling survey of radioactivity levels in textile products produced in various parts of Japan and the world in an effort to provide accurate information to the textile industry and consumers.
Survey period
From April to May 2011
Six areas were selected for sampling: the deliberate evacuation area, the evacuation-prepared area in case of emergency, Fukushima (except Restricted Area , the deliberate evacuation area, and evacuation-prepared area in case of emergency), Tokyo, western Japan (Osaka and Kyoto), and overseas (Asia and Europe).
Survey results
The selected types of textile products were sampled for each place of production listed in Section 5 and their radioactivity levels were measured. As a result, radioactivity levels significantly higher than background radiation (environmental radioactivity level measured at the site of the survey institution in Kaken Test Center (Kawaguchi City, Saitama Prefecture, JAPAN) were not detected in all of the samples. At the same time, no significant differences in radioactivity levels were found between the places of production.
The survey results for each type of sample are summarized below. The following figures of surface concentration of radioactivity indicate measurement values minus the background radiation level.
(1) Knitted products (synthetic fiber)
The measured (average) surface radioactivity concentration levels ranged from 0.01 Bq/cm2 (minimum) to 0.02 Bq/cm2 (maximum). Radioactivity above the background level was detected in none of the samples.
(2) Knitted products (natural fiber)
The measured (average) surface radioactivity concentration levels ranged from 0.00 Bq/cm2 (minimum) to 0.14 Bq/cm2 (maximum). Radioactivity above the background level was detected in none of the samples.
(3) Sewn fabric products (synthetic fiber)
The measured (average) surface radioactivity concentration levels ranged from 0.02 Bq/cm2 (minimum) to 0.02 Bq/cm2 (maximum). Radioactivity above the background level was detected in none of the samples.
As a result, radioactivity levels significantly higher than background radiation level were detected in none of the samples and no significant differences in radioactivity level were found between the places of production of samples (both between different places in Japan and between places in Japan and those outside Japan).
Following the accident at the TEPCO's Fukushima Dai-ichi Nuclear Power Station, METI realized the need to assess the impact of radiation on Japanese textile products. For this reason, METI performed a sampling survey of radioactivity levels in textile products produced in various parts of Japan and the world in an effort to provide accurate information to the textile industry and consumers.
Survey period
From April to May 2011
Six areas were selected for sampling: the deliberate evacuation area, the evacuation-prepared area in case of emergency, Fukushima (except Restricted Area , the deliberate evacuation area, and evacuation-prepared area in case of emergency), Tokyo, western Japan (Osaka and Kyoto), and overseas (Asia and Europe).
Survey results
The selected types of textile products were sampled for each place of production listed in Section 5 and their radioactivity levels were measured. As a result, radioactivity levels significantly higher than background radiation (environmental radioactivity level measured at the site of the survey institution in Kaken Test Center (Kawaguchi City, Saitama Prefecture, JAPAN) were not detected in all of the samples. At the same time, no significant differences in radioactivity levels were found between the places of production.
The survey results for each type of sample are summarized below. The following figures of surface concentration of radioactivity indicate measurement values minus the background radiation level.
(1) Knitted products (synthetic fiber)
The measured (average) surface radioactivity concentration levels ranged from 0.01 Bq/cm2 (minimum) to 0.02 Bq/cm2 (maximum). Radioactivity above the background level was detected in none of the samples.
(2) Knitted products (natural fiber)
The measured (average) surface radioactivity concentration levels ranged from 0.00 Bq/cm2 (minimum) to 0.14 Bq/cm2 (maximum). Radioactivity above the background level was detected in none of the samples.
(3) Sewn fabric products (synthetic fiber)
The measured (average) surface radioactivity concentration levels ranged from 0.02 Bq/cm2 (minimum) to 0.02 Bq/cm2 (maximum). Radioactivity above the background level was detected in none of the samples.
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