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Radioactive cesium levels in Miyagi forest soil up since 2011

Kyodo

Levels of radioactive cesium in soil and on the ground of two forests in Miyagi Prefecture have risen since the 2011 Fukushima nuclear disaster started, according to results of a recent survey.

In forests about 60 km and 120 km north of the severely damaged Fukushima No. 1 power plant, cesium is believed to be accumulating in the soil as cesium-contaminated leaves fall to the ground and decompose.

The government of Miyagi Prefecture, which measured cesium density in June 2012 and a year later in the two cedar forests, is worried about the impact on forestry and related industries if the trend persists, an official said.

In a forest in the town of Marumori closer to Fukushima, the average cesium level of 10 samples of fallen quills was 26,684 becquerels per kilogram in June 2012, but rose to 42,759 becquerels a year later. And the level in soil up to 10 cm deep increased from 721 becquerels to 3,225 becquerels, according to the study.

In a forest in Ishinomaki, even farther from the damaged nuclear plant, the level climbed about 50 percent to 3,611 becquerels among fallen quills and by 2.5-fold to 620 becquerels in soil.

In these forests where all cedar tree quills are replaced about every five years, the level of cesium among fallen quills could fall over a longer period, but may also remain in the ecosystem by being absorbed from the soil by trees, the official said.

The results differ from a study the Forestry Agency conducted in 2011 and 2012 in three municipalities in Fukushima Prefecture, which found levels of cesium increasing in soil but declining in fallen foliage.

High levels of Radioactive contamination in soil in Miyagi prefecture north of Fukushima

18 December 2013
http://sokuteikak.exblog.jp/21103494/

Screenshot from 2013-12-18 01:06:20


Radioactive contamination in soil in Izunuma area in Kkurihara-city,
Miyagi prefecture


Cs137:2100 Bq/Kg(検出下限minimum limit of detection 40.7)
Cs134:870 Bq/Kg(検出下限minimum limit of detection 10.4)
Total Cesium - Cs合計:2970 Bq/Kg(検出下限minimum limit of detection  51.1)
測定時間  time length of measurement:3600秒/1時間 3600 seconds/hour  V7容器(85ml)

Screenshot from 2013-12-18 01:13:27

http://sokuteikak.exblog.jp/21103494/

December 18, 2013 - Posted by | Uncategorized

2 Comments »

  1. How many of you have left a comment for the NRC on used fuel handling? Deadline is Dec 20. Try it, its better than preaching to the choir.

    http://nukeprofessional.blogspot.com/2013/12/your-chance-to-officially-let-nrc-and.html

    Comment by stock | December 18, 2013 | Reply

  2. […] 仙台市の病院で白内障手術が急増 ’09年395件,’10年399件,’11年514件,’12年784件  Operation of cataract increased in Sendai hospitals: 395 in 2009, 399 in 2010, 514 in 2011, 784 in 2012. The data from the official website of the Japan Labour Health and Welfare Organization, Tohoku hospital in Aoba-ku, Sendaishi-city, Miyagi prefecture http://www.tohokuh.rofuku.go.jp/ Above graph from here… http://bran7.net/archives/43285 Evidence of soil contamination in Miyagi Prefecture Contamination by Cesium 137 and Cesium 134 from 60 Km to approximately 150 Km north of the Fukushima Daichi disater site.. Radioactive contamination in soil in Izunuma area in Kkurihara-city, Miyagi prefecture Cs137:2100 Bq/Kg(検出下限minimum limit of detection 40.7) Cs134:870 Bq/Kg(検出下限minimum limit of detection 10.4) Total Cesium – Cs合計:2970 Bq/Kg(検出下限minimum limit of detection 51.1) https://nuclear-news.net/2013/12/18/radioactive-cesium-levels-in-miyagi-forest-soil-up-since-2011/?re… […]

    Pingback by Evidence of a cataract epidemic in Miyagi Prefecture after the Fukushima nuclear disaster. « nuclear-news | December 21, 2013 | Reply


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