Radiation Information

ページ番号1001416  更新日 2020年12月25日 印刷 

Measurement of radiation in the atmosphere and radioactivity in the seawater at Port of Nagoya

In accordance with the “Guidelines for Radiation Measurements in Ports” which was announced by the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) on April 22, 2011, the Nagoya Port Authority had been measuring the radioactivity in seawater and radiation levels in the atmosphere of the Port periodically since May 2011 as follows.

From the start of the measurements until March 2018, the results of the atmospheric radiation measurements were within the environmental criteria every time, and radioactive materials were never detected in the seawater.

Therefore, the measurements were suspended in April 2019 but will be resumed if needed.

Measurement results

Radiation level in the atmosphere

Measurement results at the Port of Nagoya are as follows.

(Measurement results: Unit μSv/h)

Radiation level in the atmosphere

Date

Sampling Point
(1) Garden Pier

Sampling Point
(2) Kinjo Pier

Sampling Point
(3) Tobishima Pier

Sampling Point
(4) Nabeta Pier

May 19,2011

0.07

---

0.09

0.09

May 8,2012

0.06

---

0.07

0.07

June 14,2012

0.06

0.08

0.08

0.07

July 19,2012

0.05

0.07

0.08

0.07

August 22,2012

0.05

0.08

0.07

0.08

September 14,2012

0.06

0.08

0.08

0.09

October 15,2012

0.06

0.07

0.08

0.08

November 16,2012

0.06

0.07

0.08

0.07

December 14,2012

0.06

0.07

0.09

0.08

January 15,2013

0.06

0.07

0.08

0.08

February 14,2013

0.06

0.07

0.08

0.07

March 15,2013

0.06

0.07

0.09

0.07

April 15,2013

0.06

0.07

0.08

0.07

May 15,2013

0.05

0.07

0.06

0.07

June 13,2013

0.06

0.06

0.06

0.07

July 16,2013

0.06

0.06

0.07

0.07

August 15,2013

0.05

0.07

0.07

0.07

September 13,2013

0.06

0.06

0.06

0.07

October 15,2013

0.06

0.07

0.06

0.09

November 14,2013

0.06

0.06

0.07

0.07

December 16,2013

0.06

0.06

0.06

0.07

January 15,2014

0.06

0.06

0.07

0.07

February 13,2014

0.06

0.07

0.07

0.07

March 17,2014

0.06

0.06

0.06

0.07

April 15,2014

0.06

0.06

0.06

0.07

May 16,2014

0.05

0.06

0.06

0.07

June 16,2014

0.06

0.06

0.06

0.08

July 15,2014

0.05

0.06

0.06

0.07

August 13,2014

0.06

0.07

0.06

0.07

September 29,2014

0.06

0.06

0.06

0.07

November 13,2014

0.06

0.06

0.06

0.07

 February 16,2015

 0.06

0.07

0.07

0.07

 May 14,2015

 0.06

0.07

0.06

0.07

 August 18,2015

0.06

0.07

0.07

0.07

 November 16,2015

0.05

0.07

0.07

0.07

 February 15,2016

0.06

0.07

0.06

0.07

 May 16,2016

0.06

0.06

0.07

0.07

 August 16,2016

0.06

0.06

0.06

0.07

 November 15,2016

0.06

0.06

0.07

0.07

 February 13,2017

0.05

0.06

0.06

0.07

 May 22,2017

0.05

0.06

0.06

0.07

August 17,2017

0.06

0.06

0.07

0.07

November 15,2017

0.06

0.07

0.07

0.07

February 16,2018

0.05

0.07

0.06

0.07

May 18, 2018 0.06 0.07 0.06 0.07
August 22, 2018 0.06 0.06 0.07 0.07
November 21, 2018 0.06 0.07 0.06 0.07
February 21, 2019 0.06 0.06 0.06 0.07

Radioactivity in the seawater

In the measurement results, all radioactive materials was "Not detectable".

(Measurement results: Unit Bq/L)

Radioactivity in the seawater
Date Sampling Point Radioactivity(Ionie-131) Radioactivity(Cesium-134) Radioactivity(Cesium-137)
May 16
2011
(1) South side of Kinjo Pier Not Detectable Not Detectable Not Detectable
May 16
2011
(2) Outside of Hightide breakwater Not Detectable Not Detectable Not Detectable
May 7
2012
(1) South side of Kinjo Pier Not Detectable Not Detectable Not Detectable
May 7
2012
(2) Outside of Hightide breakwater Not Detectable Not Detectable Not Detectable
May 8
2013
(1) South side of Kinjo Pier Not Detectable Not Detectable Not Detectable
May 8
2013
(2) Outside of Hightide breakwater Not Detectable Not Detectable Not Detectable
May 7
2014
(1) South side of Kinjo Pier Not Detectable Not Detectable Not Detectable
May 7
2014
(2) Outside of Hightide breakwater Not Detectable Not Detectable Not Detectable
May 15
2015
(1) South side of Kinjo Pier Not Detectable Not Detectable Not Detectable
May 15
2015
(2) Outside of Hightide breakwater Not Detectable Not Detectable Not Detectable
May 18
2016
(1) South side of Kinjo Pier Not Detectable Not Detectable Not Detectable
May 18
2016
(2) Outside of Hightide breakwater Not Detectable Not Detectable Not Detectable

May

18

2017

(1) South side of Kinjo Pier Not Detectable Not Detectable Not Detectable

May

18

2017

(2) Outside of Hightide breakwater Not Detectable Not Detectable Not Detectable

May

17

2018

(1) South side of Kinjo Pier Not Detectable Not Detectable Not Detectable

May

17

2018

(2) Outside of Hightide breakwater Not Detectable Not Detectable Not Detectable

Sampling points

Map: Radiation level in the atmosphere is measured at Garden Pier, Kinjo Pier, Tobisima Pier and Nabeta Pier. Radioactivity in the seawater is measured at south side of Kinjo Pier and outside of Hightide breakwater.

 

  1. Radiation level in the atmosphere
    (1) Garden Pier
    (2) Kinjo Pier
    (3) Tobishima Pier
    (4) Nabeta Pier
  2. Radioactivity in the seawater
    (1) South side of Kinjo Pier
    (2) Outside of Hightide breakwater

Remarks about measurement result

The radiation dose is measured one meter above the ground surface in each point.
Measurement results may differ form the data measured by research institutes and others due to the effect of radiation from the ground surface or outer space.

Reference