GOVPH
MENU
  • 1 of 6 inso-banner
  • 2 of 6 PNRI Publications
  • 3 of 6 PNRI Publications
  • 4 of 6 PNRI Publications
  • 5 of 6 PNRI Services
  • 6 of 6 PNRI Networking

Details
  • The DOST-PNRI continues to closely monitor the situation at the Fukushima-Daiichi Nuclear Power Plant.
  • The condition in the plant remains very serious but not worsening.
  • TEPCO had been given permission by the Japan Government to discharge 10,000 tons of low level contaminated water into the sea. This is to have sufficient capacity to store highly contaminated water found in the basement of the Unit 2 Turbine building. TEPCO will also discharge 1,500 tons of low level contaminated water in the sub-drain pit for Units 5 and 6. TEPCO has estimated that the potential additional annual dose to a member of the public would be around 0.6 millisievert, if he ate seaweed and seafood caught from near the plant everyday for a year. (The average annual dose from natural background radiation is 2.4 millisieverts.)
  • The DOST-PNRI does not expect that the Philippine waters will be threatened by the discharge of radiation contaminated water from the Fukushima plant. Cesium and iodine are soluble in water. The Pacific Ocean is so vast with its sheer volume and depth that the radioactive contaminants will be very much diluted and will not pose harm to the Philippine public and marine organisms.
  • Modelling of the dispersion of radioactive isotopes in the ocean has been initiated by the SIROCCO group of the Observatoire Midi-Pyrenees, University of Toulouse, in France. Results showed an initial transport into the northeast direction and fast dispersion along the Kuroshio current. The Philippines is located southwest of Japan. By the time the water current reaches the Philippines, the concentration of radioactive isotopes will be negligible.
  • However, to ensure safety of our marine environment and the public, the DOST-PNRI is continuously performing radiological surveillance activities and these include collection, monitoring, and analyses of our marine biota for radioactivity.
  • The Comprehensive Nuclear Test Ban Treaty Organization (CTBTO) air monitoring station in the Philippines being serviced by the DOST-PNRI detected the following radioactivity concentrations:

Day

Iodine-131
*(µBq/m3)

Cesium-134
(µBq/m3)

Cesium-137
(µBq/m3)

March 23

33

4.2

5.7

March 24

480

92

120

March 25

54

6.3

7.7

March 26

20

0.7

0.7

March 27

47

2.6

3.1

March 28

93

4.4

5.3

March 29

130

4.6

5.3

March 30

210

1.7

1.6

March 31 to present**

-

-

-

*microbecquerels per cubic meter; 1 microbecquerel = 1 x 10-6 becquerel

** Data still being processed by CTBTO

  • The peak values on March 24 correspond to a dose of 131 nanosieverts in a year; sleeping next to someone for 8 hours a day for one year gives a dose of 20,000 nanosieverts because of the natural radioactivity present in the body.
  • Latest DOST-PNRI RADIATION LEVEL CHECK at PNRI grounds as of 9:00 AM, April 6, 2011: 85 to 100 nSv/hr (nanosieverts per hour), STATUS: NORMAL

Details
  • The DOST-PNRI continues to closely monitor the situation at the Fukushima-Daiichi Nuclear Power Plant.
  • The condition in the plant remains very serious but not worsening.
  • The Comprehensive Nuclear Test Ban Treaty Organization (CTBTO) air monitoring station in the Philippines being serviced by the DOST-PNRI detected the following radioactivity concentrations:

Day

Iodine-131
*(µBq/m3)

Cesium-134
(µBq/m3)

Cesium-137
(µBq/m3)

March 23

33

4.2

5.7

March 24

480

92

120

March 25

54

6.3

7.7

March 26

20

0.7

0.7

March 27

47

2.6

3.1

March 28

93

4.4

5.3

March 29

130

4.6

5.3

March 30

210

1.7

1.6

*microbecquerels per cubic meter; 1 microbecquerel = 1 x 10-6 becquerel 

  • The peak values on March 24 correspond to a dose of 131 nanosieverts in a year which is approximately 1/4000 of the dose from a single chest X-ray or the dose from 14 kilometers (km) of jet air travel [aerial distance: Manila to Los Angeles, USA is approximately 12,000 km].
  • Latest DOST-PNRI RADIATION LEVEL CHECK at PNRI grounds as of 9:00 AM, April 4, 2011: 90 to 110 nSv/hr (nanosieverts per hour), STATUS: NORMAL

Details
  • The DOST-PNRI continues to closely monitor the situation at the Fukushima-Daiichi Nuclear Power Plant.
  • The condition in the plant remains very serious but not worsening.
  • The Comprehensive Nuclear Test Ban Treaty Organization (CTBTO) air monitoring station in the Philippines being serviced by the DOST-PNRI detected the following radioactivity concentrations:

Day

Iodine-131
*(µBq/m3)

Cesium-134
(µBq/m3)

Cesium-137
(µBq/m3)

March 23

33

4.2

5.7

March 24

480

92

120

March 25

54

6.3

7.7

March 26

20

0.7

0.7

March 27

47

2.6

3.1

March 28

93

4.4

5.3

March 29

130

4.6

5.3

*microbecquerels per cubic meter; 1 microbecquerel = 1 x 10-6 becquerel

  • The peak values on March 24 correspond to a dose of 131 nanosieverts in a year which is approximately 1/4000 of the dose from a single chest X-ray.
  • Latest DOST-PNRI RADIATION LEVEL CHECK at PNRI grounds as of 9:00 AM, April 1, 2011: 85 to 140 nSv/hr (nanosieverts per hour), STATUS: NORMAL

Details
  • The DOST-PNRI continues to closely monitor the situation at the Fukushima-Daiichi Nuclear Power Plant.
  • The condition in the plant remains very serious but not worsening.
  • The Comprehensive Nuclear Test Ban Treaty Organization (CTBTO) air monitoring station in the Philippines being serviced by the DOST-PNRI detected the following radioactivity concentrations: 

Day

Iodine-131
*(µBq/m3)

Cesium-134
(µBq/m3)

Cesium-137
(µBq/m3)

March 23

33

4.2

5.7

March 24

480

92

120

March 25

54

6.3

7.7

March 26

20

0.7

0.7

March 27

47

2.6

3.1

March 28

93

4.4

5.3

*microbecquerels per cubic meter; 1 microbecquerel = 1 x 10-6 becquerel