Fukushima-Daiichi Nuclear Power Plant Accident in Japan INFORMATION BULLETIN No.29 (19 May 2011 Update as of 11:00 AM)
- 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 is slowly getting better.
- Gamma dose rates are measured daily in all 47 prefectures. As of 19 May 2011, the only notable value is that from Fukushima prefecture, where gamma dose rate is 1.6 µSv/h. In all other prefectures, reported gamma dose rates are below 0.1 µSv/h.
- As of 16 May 2011, Iodine-131, Cesium-134 and Cesium-137 were not detected in seawater at the sampling points of Japan’s Ministry of Education, Culture, Sports, Science and Technology (MEXT) beyond 30 km from the Fukushima plant.
- As of 18 May 2011, the PNRI had analyzed 50 food samples (e.g. mackerel, chocolate, and condiments) imported from Japan. These had activity concentrations lower than 3 Bq/kg of Cesium-137 and Cesium-134, and lower than 1 Bq/kg of Iodine-131. The WHO Codex Alimentarius Commission recommended limit for international trade is 1000 Bq/kg for total radioactivity concentration in food.
- 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 (in table and graph):
- The peak values on March 24 correspond to a dose of 131 nanosieverts in a year.
- Activity Concentration of Topsoil Samples taken from PNRI grounds and other sites:
Activity Concentration of Water Samples taken from various sites:
Activity Concentration of Marine Biota Samples taken from Luzon:
Ambient Gamma Radiation Dose Rate Measurements taken at PNRI and various provinces in Luzon since March 2011:
a microbecquerels per cubic meter; 1 microbecquerel = 1 x 10-6 becquerel
b The above Cesium-137 levels in the soil, water, and fish samples are within background levels. The Cesium-137 is residual activity from atmospheric nuclear weapons testing in the 1950’s and 1960’s, not from the Fukushima accident.
c millibecquerels per liter; 1 millibecquerel = 1 x 10-3 becquerel; some copies of Information Bulletin No.22 may have erroneously stated this as Bq/kg instead of mBq/L
d Dates corrected
- Latest DOST-PNRI RADIATION LEVEL CHECK at PNRI grounds as of 9:00 AM, 16 May 2011:
85 – 109 nSv/h, STATUS: NORMAL - The radiological and safety impact on the Philippines REMAINS INSIGNIFICANT as it had been since the beginning of the Fukushima Daiichi nuclear accident.
- The PNRI-DOST will no longer issue bulletins unless there is a significant radiological development.
- For the latest information, please access the following websites:
- International Atomic Energy Agency (IAEA) (http://www.iaea.org/newscenter/news/tsunamiupdate01.html)
- Nuclear and Industrial Safety Administration (NISA) of Japan (www.nisa.meti.go.jp/english/index.html)
- World Health Organization (http://www.who.int/hac/crises/jpn/en/index.html)
- Tokyo Electric Power Company (TEPCO) (http://www.tepco.co.jp/en/press/corp-com/release/index-e.html)
- For further advisories, please call the PNRI trunklines with Tel Nos. 929-6010 to 19 or visit the following:
- DOST (www.dost.gov.ph)
- PNRI (www.pnri.dost.gov.ph)
- STII (www.stii.dost.gov.ph)
Fukushima-Daiichi Nuclear Power Plant Accident in Japan INFORMATION BULLETIN No. 28 (Part II) (12 May 2011Update as of 11:00 AM)
- Details
Activity Concentration of Water Samples taken from various sites:
|
DATE COLLECTED |
SAMPLE TYPE/SITE |
ACTIVITY CONCENTRATION, mBq/L c |
||
|
Iodine-131 |
Cesium-134 |
Cesium-137 |
||
|
April 2 |
Seawater/Sta. Ana, Cagayan |
Not detected |
Not detected |
1.66 b |
|
April 5 |
Freshwater/La Mesa Dam |
Not detected |
Not detected |
Not detected |
|
April 13 |
Seawater/Baler, Aurora |
Not detected |
Not detected |
2.70 b |
Activity Concentration of Fish Samples taken from Luzon:
|
DATE COLLECTED d |
FISH TYPE/SITE |
ACTIVITY CONCENTRATION, Bq/kg |
||
|
Iodine-131 |
Cesium-134 |
Cesium-137 |
||
|
April 4 |
Dorado/Sta. Ana Fishport, Cagayan |
Not detected |
Not detected |
0.164 b |
|
April 4 |
Tulingan/Sta. Ana Fishport, Cagayan |
Not detected |
Not detected |
Not detected |
|
April 4 |
Bariles/Sta. Ana Fishport, Cagayan |
Not detected |
Not detected |
Not detected |
|
April 14 |
Malasugui/ Baler, Aurora |
Not detected |
Not detected |
0.57 b |
|
April 14 |
Dalagang Bukid/ Baler, Aurora |
Not detected |
Not detected |
0.76 b |
|
April 14 |
Tambakol/Baler, Aurora |
Not detected |
Not detected |
1.09 b |
|
April 14 |
Tangigue/Baler, Aurora |
Not detected |
Not detected |
Not detected |
Ambient Gamma Radiation Dose Rate Measurements taken at PNRI and various provinces in Luzon since March 2011:
|
Location |
No. of Measurements |
Dose Rate (nSv/h) |
REMARKS |
|
|
Range |
Mean |
|||
|
PNRI |
41 |
93 – 106 |
101 ± 3 |
Normal |
|
Batanes |
15 |
65 – 85 |
76 |
Normal |
|
Aurora |
14 |
48 – 66 |
57 ± 6 |
Normal |
|
Nueva Ecija |
6 |
52 – 71 |
66 ± 7 |
Normal |
|
Camarines Norte |
11 |
59 – 95 |
84 ±10 |
Normal |
a microbecquerels per cubic meter; 1 microbecquerel = 1 x 10-6 becquerel
b The above Cesium-137 levels in the soil, water, and fish samples are within background levels. The Cesium-137 is residual activity from atmospheric nuclear weapons testing in the 1950’s and 1960’s, not from the Fukushima accident.
c millibecquerels per liter; 1 millibecquerel = 1 x 10-3 becquerel; some copies of Information Bulletin No.22 may have erroneously stated this as Bq/kg instead of mBq/L
d Dates corrected
- Latest DOST-PNRI RADIATION LEVEL CHECK at PNRI grounds as of 9:00 AM, 12 May 2011:
91 – 107 nSv/h, STATUS: NORMAL - The radiological and safety impact on the Philippines REMAINS INSIGNIFICANT as it had been since the beginning of the Fukushima Daiichi nuclear accident.
- For the latest information, please access the following websites:
- International Atomic Energy Agency (IAEA) (http://www.iaea.org/newscenter/news/tsunamiupdate01.html)
- Nuclear and Industrial Safety Administration (NISA) of Japan (www.nisa.meti.go.jp/english/index.html)
- World Health Organization (http://www.who.int/hac/crises/jpn/en/index.html)
- Tokyo Electric Power Company (TEPCO) (http://www.tepco.co.jp/en/press/corp-com/release/11041707-e.html)
- For further advisories, please call the PNRI trunklines with Tel Nos. 929-6010 to 19 or visit the following:
- DOST (www.dost.gov.ph)
- PNRI (www.pnri.dost.gov.ph)
- STII (www.stii.dost.gov.ph)
Fukushima-Daiichi Nuclear Power Plant Accident in Japan INFORMATION BULLETIN No. 28 (Part I) (12 May 2011 Update as of 11:00 AM)
- 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 is slowly getting better.
- Gamma dose rates are measured daily in all 47 prefectures. As of 11 May 2011, the only notable values are those from Fukushima prefecture, where gamma dose rates were 1.7 µSv/h and Ibaraki prefecture, where gamma dose rates were 0.10 µSv/h. In all other prefectures, reported gamma dose rates were below 0.1 µSv/h with a general decreasing trend.
- Iodine-131, Cesium-134 and Cesium-137 were not detected in seawater at the sampling points of Japan’s Ministry of Education, Culture, Sports, Science and Technology (MEXT) beyond 30 km from the Fukushima plant.
- As of 11 May 2011, the PNRI had analyzed 42 food samples imported from Japan. These had activities lower than 3 Bq/kg of Cesium-137 and Cesium-134 and were almost at the limit of detection. The WHO Codex Alimentarius Commission recommended limit for international trade is 1000 Bq/kg for total radioactivity in food.
- 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 (in table and graph):
|
Day |
Iodine-131 |
Cesium-134 |
Cesium-137 |
|
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 |
31 |
Not detected |
0.7 |
|
April 1 |
57 |
4.3 |
5.7 |
|
April 2 |
61 |
9.9 |
12 |
|
April 3 |
160 |
86 |
100 |
|
April 4 |
79 |
53 |
79 |
|
April 5 |
51 |
18 |
20 |
|
April 6 |
21 |
8.7 |
11 |
|
April 7 |
12 |
4.2 |
4.6 |
|
April 8 |
73 |
23 |
28 |
|
April 9 |
95 |
22 |
25 |
|
April 10 |
140 |
21 |
26 |
|
April 11 |
80 |
16 |
20 |
|
April 12 |
53 |
8.1 |
11 |
|
April 13 |
45 |
13 |
17 |
|
April 14 |
30 |
17 |
21 |
|
April 15 |
26 |
16 |
21 |
|
April 16 |
23 |
22 |
28 |
|
April 17 |
21 |
17 |
21 |
|
April 18 |
15 |
9.4 |
14 |
|
April 19 |
12 |
5.7 |
7.2 |
|
April 20 |
7.5 |
9.8 |
12 |
|
April 21 |
5.3 |
6.4 |
7.8 |
|
April 22 |
6.2 |
4.8 |
5.9 |
|
April 23 |
6.9 |
3.1 |
6.9 |
|
April 24 |
5.5 |
2.2 |
3.8 |
|
April 25 |
4.6 |
2.8 |
2.5 |
|
April 26 |
1.4 |
0.64 |
Not detected |
|
April 27 |
1.1 |
Not detected |
Not detected |
|
April 28 |
1.6 |
Not detected |
Not detected |
|
April 29 |
Not detected |
Not detected |
Not detected |
|
April 30 |
Not detected |
Not detected |
Not detected |
|
May 1 |
1.5 |
Not detected |
Not detected |
|
May 2 |
Not detected |
Not detected |
Not detected |
|
May 3 |
Not detected |
Not detected |
Not detected |
|
May 4 |
Not detected |
Not detected |
Not detected |
|
May 5 |
Not detected |
Not detected |
Not detected |
|
May 6 |
0.84 |
Not detected |
Not detected |
|
May 7 |
Not detected |
Not detected |
Not detected |
|
May 8 |
Not detected |
Not detected |
Not detected |
|
May 9 |
Not detected |
Not detected |
Not detected |
- 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.
- Activity Concentration of Topsoil Samples taken from PNRI grounds and other sites:
|
DATE COLLECTED d |
SITE |
ACTIVITY CONCENTRATION, Bq/kg |
||
|
Iodine-131 |
Cesium-134 |
Cesium-137 |
||
|
March 28 |
PNRI |
Not detected |
Not detected |
0.064 b |
|
March 28 |
PNRI |
Not detected |
Not detected |
0.175 b |
|
April 1 |
Gattaran, Cagayan |
Not detected |
Not detected |
Not detected |
|
April 4 |
Tuguegarao, Cagayan |
Not detected |
Not detected |
0.867 b |
|
April 5 |
La Mesa Dam |
Not detected |
Not detected |
Not detected |
|
April 5 |
La Mesa Dam |
Not detected |
Not detected |
0.500 b |
|
April 8 |
Site 1, Tanay, Rizal |
Not detected |
Not detected |
Not detected |
|
April 8 |
Site 2, Tanay, Rizal |
Not detected |
Not detected |
Not detected
|
Fukushima-Daiichi Nuclear Power Plant Accident in Japan INFORMATION BULLETIN No. 27 (05 May 2011 Update as of 11:00 AM)
- 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 is slowly getting better.
- As of 4 May 2011, the radiation levels in 45 out of 47 prefectures are within the typical Japanese background levels of 50-100 nanosieverts per hour (nSv/h). Ibaraki prefecture showed a maximum dose rate of 104 nSv/h while Fukushima prefecture showed a maximum dose rate of 1,700 nSv/h.
- As of 29 April 2011, the PNRI had analyzed 29 food samples imported from Japan. These had activities lower than 3 Bq/kg of Cesium-137 and Cesium-134 and were almost at the limit of detection. The WHO Codex Alimentarius Commission recommended limit for international trade is 1000 Bq/kg for total radioactivity in food.
- 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 (in table and graph):
|
Day |
Iodine-131 |
Cesium-134 |
Cesium-137 |
|
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 |
31 |
Not detected |
0.7 |
|
April 1 |
57 |
4.3 |
5.7 |
|
April 2 |
61 |
9.9 |
12 |
|
April 3 |
160 |
86 |
100 |
|
April 4 |
79 |
53 |
79 |
|
April 5 |
51 |
18 |
20 |
|
April 6 |
21 |
8.7 |
11 |
|
April 7 |
12 |
4.2 |
4.6 |
|
April 8 |
73 |
23 |
28 |
|
April 9 |
95 |
22 |
25 |
|
April 10 |
140 |
21 |
26 |
|
April 11 |
80 |
16 |
20 |
|
April 12 |
53 |
8.1 |
11 |
|
April 13 |
45 |
13 |
17 |
|
April 14 |
30 |
17 |
21 |
|
April 15 |
26 |
16 |
21 |
|
April 16 |
23 |
22 |
28 |
|
April 17 |
21 |
17 |
21 |
|
April 18 |
15 |
9.4 |
14 |
|
April 19 |
12 |
5.7 |
7.2 |
|
April 20 |
7.5 |
9.8 |
12 |
|
April 21 |
5.3 |
6.4 |
7.8 |
|
April 22 |
6.2 |
4.8 |
5.9 |
|
April 23 |
6.9 |
3.1 |
6.9 |
|
April 24 |
5.5 |
2.2 |
3.8 |
|
April 25 |
4.6 |
2.8 |
2.5 |
|
April 26 |
1.4 |
0.64 |
Not detected |
|
April 27 |
1.1 |
Not detected |
Not detected |
|
April 28 |
1.6 |
Not detected |
Not detected |
|
April 29 |
Not detected |
Not detected |
Not detected |
|
April 30 |
Not detected |
Not detected |
Not detected |
|
May 1 - present |
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.
Activity Concentration of Topsoil Samples taken from PNRI grounds and other sites:
|
DATE |
SITE |
ACTIVITY CONCENTRATION, Bq/kg |
||
|
Iodine-131 |
Cesium-134 |
Cesium-137 |
||
|
March 28 |
PNRI |
Not detected |
Not detected |
0.064 b |
|
March 28 |
PNRI |
Not detected |
Not detected |
0.175 b |
|
April 1 |
Gattaran, Cagayan |
Not detected |
Not detected |
Not detected |
|
April 4 |
Tuguegarao, Cagayan |
Not detected |
Not detected |
0.867 b |
|
April 5 |
La Mesa Dam |
Not detected |
Not detected |
Not detected |
|
April 5 |
La Mesa Dam |
Not detected |
Not detected |
0.500 b |
|
April 8 |
Site 1, Tanay, Rizal |
Not detected |
Not detected |
Not detected |
|
April 8 |
Site 2, Tanay, Rizal |
Not detected |
Not detected |
Not detected |
Activity Concentration of Water Samples taken from various sites:
|
DATE |
SAMPLE TYPE/SITE |
ACTIVITY CONCENTRATION, mBq/L c |
||
|
Iodine-131 |
Cesium-134 |
Cesium-137 |
||
|
April 2 |
Seawater/Sta. Ana, Cagayan |
Not detected |
Not detected |
1.66 b |
|
April 5 |
Freshwater/La Mesa Dam |
Not detected |
Not detected |
Not detected |
|
April 13 |
Seawater/Baler, Aurora |
Not detected |
Not detected |
2.70 b |
Activity Concentration of Fish Samples taken from Luzon:
|
DATE |
FISH TYPE/SITE |
ACTIVITY CONCENTRATION, Bq/kg |
||
|
Iodine-131 |
Cesium-134 |
Cesium-137 |
||
|
April 4 |
Dorado / Sta. Ana Fishport |
Not detected |
Not detected |
0.164 b |
|
April 4 |
Tulingan / Sta. Ana Fishport |
Not detected |
Not detected |
Not detected |
|
April 4 |
Bariles / Sta. Ana Fishport |
Not detected |
Not detected |
Not detected |
|
April 14 |
Malasugui / Baler, Aurora |
Not detected |
Not detected |
0.57 b |
|
April 14 |
Dalagang Bukid / Baler, Aurora |
Not detected |
Not detected |
0.76 b |
a microbecquerels per cubic meter; 1 microbecquerel = 1 x 10-6 becquerel
b The above Cesium-137 levels in the soil, water, and fish samples are within background levels. The Cesium-137 is residual activity from atmospheric nuclear weapons testing in the 1950’s and 1960’s, not from the Fukushima accident.
c millibecquerels per liter; 1 millibecquerel = 1 x 10-3 becquerel; some copies of Information Bulletin No.22 may have erroneously stated this as Bq/kg instead of mBq/L
d Dates corrected
- Latest DOST-PNRI RADIATION LEVEL CHECK at PNRI grounds as of 9:00 AM, 05 May 2011:
86 – 118 nSv/h, STATUS: NORMAL - The radiological and safety impact on the Philippines REMAINS INSIGNIFICANT as it had been since the beginning of the Fukushima Daiichi nuclear accident.
- For the latest information, please access the following websites:
- International Atomic Energy Agency (IAEA) (http://www.iaea.org/newscenter/news/tsunamiupdate01.html)
- Nuclear and Industrial Safety Administration (NISA) of Japan (www.nisa.meti.go.jp/english/index.html)
- World Health Organization (http://www.who.int/hac/crises/jpn/en/index.html)
- Tokyo Electric Power Company (TEPCO) (http://www.tepco.co.jp/en/press/corp-com/release/11041707-e.html)
- For further advisories, please call the PNRI trunklines with Tel Nos. 929-6010 to 19 or visit the following:
- DOST (www.dost.gov.ph)
- PNRI (www.pnri.dost.gov.ph)
- STII (www.stii.dost.gov.ph)
