New info on radiation from the NHK

December 16, 2012

Radiation measured in the waters and air ( Fukushima No.1 Plant )

http://www9.nhk.or.jp/kabun-blog/500/141120.html#more

Data will be posted each Sunday from now on. The following are the results of observations during the Dec.9 week.

On Dec. 13, Cs-137density was found to be 3.3 Bq/L in the sumples collected 30 meters north of the Unit 5-6 outlets.

On the other six days, no noticeable amount of radioactive iodine or cesium was detected from sea water near the outlets of the Fukushhima No.1 plant. Radiological dose in the air of the plant site, meaured this day,is posted on the following page. (Source: TEPCO)

MAP http://www3.nhk.or.jp/news/genpatsu-fukushima/houshasen/index2.html

“ND” means the density of I-131, Cs-134 or Cs-137 was below the respective measurable limit of 0.41~0.48Bq/L, 0.96Bq/L or 1.3Bq/L. Those limits vary with the duration in which the instrument is in contact with samples and collective volumes of the samples.

In the event the seawater contains more than two nuclides,the density of each nuclide is scaled against its allowable limit. Thereafter the sum of the scaled densities of all nuclides is gauged against 1.

【No.1 Plant :Radioactive substances detected in the waters】

【A】 From samples collected 30 meters north of the Unit 5-6 outlets at 07:05 Dec. 13.

Iodine 131: ND ( --- times the limit)

Cesium 134: 1.3Bq/L ( 0.02 times the limit)

Cesium 137: 3.3Bq/L ( 0.04 times the limit)

【B】 From samples collected 330 meters south of the Unit 1-4 outlets at 07:30 Dec. 13.

Iodine 131: ND ( --- times the limit)

Cesium 134: ND ( --- times the limit)

Cesium 137: ND ( --- times the limit)