Topics 2022 Niigata prefecture sake brewing rice Radioactive substance test results

Nov. 2023, 02

XNUMX. Survey and inspection method

  • Target area: 5 points in Niigata prefecture (Kaetsu East, Kaetsu West, Sado, Chuetsu, Joetsu)
  • Target varieties: 2022 Niigata Prefecture “Gohyakumangoku”, “Takane Nishiki”, “Koshitanrei”
  • Collection method: Brown rice is collected and analyzed at the time of harvest.
  • Analytical organization: Niigata Prefectural Institute for Environmental Health
  • Analytical method: Gamma ray spectrum by germanium semiconductor detector
  • Target nuclides: radioactive iodine, radioactive cesium
  • Lower limit of quantification: 5Bq / kg (becquerel)
    (The lower limit of quantification is the minimum value that can be quantified by the analytical method and the minimum value that the analytical institution can prove based on the measurement.)

XNUMX, test results

"Gohyakumangoku" from Niigata Prefecture (produced in 2022)

Inspection area Collection / submission date Proof date Radioiodine (5Bq / kg) Radioactive cesium (5Bq / kg)
I-131 CS-134 CS-137

Kaetsu East

9/12

10/31

Not detected

Not detected

Not detected

Shimokoshi West

9/13

10/5

Not detected

Not detected

Not detected

Sado

9/20

10/11

Not detected

Not detected

Not detected

Chuetsu

9/27

10/5

Not detected

Not detected

Not detected

Joetsu

9/1

12/27

Not detected

Not detected

Not detected

* Not detected ... Indicates that the value is below the lower limit of quantification for each nuclide to be inspected.

"Takane Nishiki" from Niigata Prefecture (produced in 2022)

Inspection area Collection / submission date Proof date Radioiodine (5Bq / kg) Radioactive cesium (5Bq / kg)
I-131 CS-134 CS-137

Kaetsu East

9/12

10/31

Not detected

Not detected

Not detected

Shimokoshi West

9/19

10/5

Not detected

Not detected

Not detected

Sado

9/24

10/11

Not detected

Not detected

Not detected

Chuetsu

10/20

10/31

Not detected

Not detected

Not detected

Joetsu

9/5

12/27

Not detected

Not detected

Not detected

* Not detected ... Indicates that the value is below the lower limit of quantification for each nuclide to be inspected.

"Koshitanrei" from Niigata Prefecture (produced in 2022)

Inspection area Collection / submission date Proof date Radioiodine (5Bq / kg) Radioactive cesium (5Bq / kg)
I-131 CS-134 CS-137

Kaetsu East

9/29

10/21

Not detected

Not detected

Not detected

Shimokoshi West

9/25

10/5

Not detected

Not detected

Not detected

Sado

9/27

10/11

Not detected

Not detected

Not detected

Chuetsu

9/23

October 5, R2

Not detected

Not detected

Not detected

Joetsu

9/26

12/27

Not detected

Not detected

Not detected

* Not detected ... Indicates that the value is below the lower limit of quantification for each nuclide to be inspected.

Please see here for the radioactivity test of sake rice produced in Reiwa 3nd year.