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Status of the Fukushima Daiichi Nuclear Power Plant - IAEA – April 10th Pages From Ml12068a155 - Foia Pa-2011-0118, Foia Pa-2011-0119, Foia Pa-2011-0120 - Resp 53 - Partial - Group Mmm, Nnn. Part 3 of 5. (634 Page(s), 4 10 2011)-7 | Nuclear Power Plant | Fukushima Daiichi Nuclear Power Plant
saveSave Status of the Fukushima Daiichi Nuclear Power Plan... For Later
Fukushima Radiation Estimates - RSMC - March 26th - 2200 - Pages from ML12037A104 - FOIA PA-2011-0118, FOIA PA-2011-0119 &amp; FOIA PA 2011-0120 - Resp 41 - Partial - Group DDD Part 2 of 3. (138 page(s), 1 24 2012)-17
IAEA Documents related to the Fukushima Disaster- April Pages From Ml12068a155 - Foia Pa-2011-0118, Foia Pa-2011-0119, Foia Pa-2011-0120 - Resp 53 - Partial - Group Mmm, Nnn. Part 3 of 5. (634 Page(s), 4 10 2011)-3
Fukushima Radiation Mappin - RSMC - March 26th - 1700 - Pages from ML12037A104 - FOIA PA-2011-0118, FOIA PA-2011-0119 &amp; FOIA PA 2011-0120 - Resp 41 - Partial - Group DDD Part 2 of 3. (138 page(s), 1 24 2012)-20
Radiation Data Summary - April 10th - Pages From Ml12068a155 - Foia Pa-2011-0118, Foia Pa-2011-0119, Foia Pa-2011-0120 - Resp 53 - Partial - Group Mmm, Nnn. Part 3 of 5. (634 Page(s), 4 10 2011)
Italy Monitoring for Radiation from the Fukushima Daiichi Disaster - Pages From Ml12068a155 - Foia Pa-2011-0118, Foia Pa-2011-0119, Foia Pa-2011-0120 - Resp 53 - Partial - Group Mmm, Nnn. Part 3 of 5. (634 Page(s), 4 10 2011)-30
NISA/TEPCO Press Release - Concerning Release of Contaminated Water into the Ocean - Pages From Ml12068a155 - Foia Pa-2011-0118, Foia Pa-2011-0119, Foia Pa-2011-0120 - Resp 53 - Partial - Group Mmm, Nnn. Part 3 of 5. (634 Page(s), 4 10 2011)-15
TEPCO Press Release - Release of Radioactive Contaminated Water into the Ocean - April 10th - Pages From Ml12068a155 - Foia Pa-2011-0118, Foia Pa-2011-0119, Foia Pa-2011-0120 - Resp 53 - Partial - Group Mmm, Nnn. Part 3 of 5. (634 Page(s), 4 10 2011)-2
Fukushima Radiation Mapping - RSMC - March 26th - March 29th - Pages from ML12037A104 - FOIA PA-2011-0118, FOIA PA-2011-0119 &amp; FOIA PA 2011-0120 - Resp 41 - Partial - Group DDD Part 2 of 3. (138 page(s), 1 24 2012)-22
Informative Speech Cot - Wed.
Can Nuclear Power Be an Answer to India’s Electricity Needs
10m APRIL 2011 00:00 UTC
Internattonl Atomic Energy Agency
Incident and Emergency Centre FOR AUTHORITIES USE ONLY Status of the Fukushima Daiichi Nuclear Power Plant and related environmental conditions
Note: Updatedand new information is underlined. The IAEA receives information updates from a variety of official Japanese sources, through the national competent authorities: the Nuclear and Industrial Safety Agency (NISA) and the Ministry of Education, Culture, Sports, Science and Technology (MEXT). Based on the information received by 9th April 2011 17:00 UTC (in particular NISA press release 83) the following update related to the reactor units at the Fukushima Daiichi Nuclear Power Plant (NPP), and related environmental conditions, is provided. Information on the status of the Japanese Nuclear Plants as the result of earthquake in Japan on the 8th of April at 23:00 UTC is shown in the Annex to this document. Restoration of AC Power Units 1 to 4 Efforts to restore AC power and to energize specific plant equipment continue. Power to the temporary electric pumps for water supply to Reactor Pressure Vessels (RPV) of units 1, 2 and 3 is from the off-site power supply. Lighting in parts of Units 1- 4 Turbine Building is restored. Management of on-site contaminated water Unit 1, 2 and 3 have 60,000 tons of radioactive water that needs to be removed. This water will be transferred to the condenser and the Radioactive Waste Treatment facility. In addition, temporary storage tanks have been ordered to provide additional capacity for the water and will be located adjacent to the Radioactive Waste Treatment facility. A pictorial of the transfer sequence of water for each unit is shown below. At unit 2 water transfer from the condenser to the condensate storage tank was completed (April 9, 4:10 UTC)
Page I of 25
4/10/2011 12:28:00 AM
Sequence of Events to Remove Water in Unit 1
'0: 2~ J r~t 1,
I'Ste p Mz.r 4'2 17 2,-Z*h
Sequence of Events to Remove Water in Unit 2
.Mz. 2 t-,A= - st - Un~t 2
2 1RpM-;msfe, tcCz-a jiC:vdne
Page 2 6f25
Sequence of Events to Remove
Water in Unit 3
Appr 5~' 2 Step
tzt, Fv
Leakage of highly contaminated water into the sea The leakage of highly contaminated water from the 20 cm crack in the cable storage pit of Unit 2 directly to the sea reported on 2 April was stopped by injection of coagulation agents (liquid glass) on 5 April. Additional activities to secure the leak were reported finished on 04:15 UTC 6 April. Discharge of water containing low level of radioactivity from Daiichi into the Sea On 5 April, a directive was issued in regard to advance notification and contact to the local governments with regard to taking measures related to discharge of radioactive materials from Fukushima Daiichi NPS, which may have a possible impact on the environment. To prevent discharge of contaminated water from the Fukushima Plant to the open sea, construction work was carried out at the breakwater in the southern part of the Plant (from 15:00-16:00 UTC 5 April). Nitrogen iniection to Unit I Containment Vessel As of 6th April, TEPCO started preparations for nitrogen gas injection to Unit 1 Containment Vessel. The operation started at 13:30 UTC, 6h April. It was confirmed that nitrogen gas reached the Containment Vessel at 16:31 UTC, 6 hApril. As of April Ph 0:00 UTC the injection of nitrogen gas into the containment vessels of Unit 2 and 3 is not planned. On 6h April NISA ordered TEPCO to implement the following: 1. Check plant parameters precisely and take suitable steps, as required, to cope with unexpected situations with an impact on safety; 2. Carry out the work only after assuring proper industrial safety to protect workers; 3. Because of the possibility of radiation releases from the reactor, carry out appropriate enhanced radiation monitoring and make available the data obtained.
Plant Status Unit I Injection of fresh water into the RPV by off-site power was on-going as of 07:00 UTC 8t' of April. The temperature of the RPV is 246.6 0 C at the feed nozzle and 119.4 0 C at the lower head at 04:00 UTC on 8t Indicators of the containment pressure show slight increase, corresponding to the nitrogen injection. Operation for the switch to the hi-gh-purity nitrogen generator be-gan at 18:59 UTC, April 8. Operation of opening iniection valves started, at 19:10 UTC April 8, Valves were fully opened. Instrumentation B for Reactor Pressure indicates that the pressure in the RPV is increasing and instrumentation A indicates that it has stabilized. NISA has indicated that some instruments in the reactor vessel may not be working properly. This information is presented in the following graph.
Fukushima Daiichi Unit-1 Reactor Vessel, Containment Vessel & Suppression Pool Pressure
10.00 -0--U-1 Reactor pressure A (atm) 9.00 -- &-U-1 Reactor pressure B (atm)
--*,..........
U-I Primary Containment Pressure
p latml
--."-U-1 Suppression pool pressure (at
......... .... . . ..
March 14 March 16 March 18 March 20 March 22 March 24 March 26 March 28 March 30 April01
Unit 2 Injection of fresh water into the RPV was on-going as of 07:00 UTC on 8th April. The temperature of the RPV at the feed water nozzle is 141.20 C as of 03:00 UTC on 8th April. 36 tonnes of fresh water was injected via Spent Fuel Cooling System line to the spent fuel pool by a temporary pump on 7h April from 04:39 to 05:34 UTC. On 8 April NISA announced that they had discovered a minor error in previously distributed NISA news releases and plant parameter files. According to NISA, the measurement points of RPV pressure for Unit 2 are described as A and B, however they have been using display A and D values since 04:00 UTC 20 March. NISA describe that there are two pressure sensors in each reactor pressure vessel at the same height. Each pressure sensor has two monitors. One pressure sensor is connected with display A and B while the other pressure sensor is connected with display C and D. The pressure in the RPV and Containment Vessel has stabilised at atmospheric pressure since March 18'h and will no longer be presented graphically unless changes are observed. Unit 3 Injection of fresh water into the RPV was on-going as of 07:00 UTC on 8h April. The temperature of the RPV is. 88.80 C at the feed nozzle and 110.7 oC at the lower head as of 03:00 UTC on 8 April. Fresh water spray (around 77t) over the Spent Fuel Pool of Unit 3 using Concrete Pump Truck (50t/h) was carried out (from 8:06 till 12:00 UTC April 8th). TEPCO: iniected total amount of water approximately 5123 tons (from March18, April 8). The pressure in the RPV and Containment Vessel has stabilised at atmospheric pressure since March and will no longer be presented graphically unless changes are observed.
2 2 nd
Unit 4 38 tonnes of fresh water was sprayed onto the spent fuel pool by concrete pump between 09:23 UTC and 10:40 UTC on 7"' April. There has been no further reported change in the status of Unit 4. Units 5 and 6 Both units remain in cold shutdown with plant systems operating on off-site AC power. Common Spent Fuel Storage Facillity The Common Spent Fuel Pool temperature is stable, measured at 32 oC as of 22:50 UTC
Units 1, 2, 3, 4, 5 and 6 - Plant Status
Parameter!" Indications
MPa Reactor Pressure Vessel Pressure
SFiuhushima
Dalichi____________
ni 1Unt
0.410 (A) 0.825 (B) (A) 8.25 (B) 190
Uit~ 3~
0.080 (A) 0.075 (D) 0.80 (A)
0.75 (D)
Unit~ 4
>Unit 6
Reao P4.10 Containment Vessel (Drywell)
0.096_(A) 0.0 19 (C) 0.96 (A1
Reactor Pressure Vessel Level Reactor Pressure Vessel Temperature (Water supply nozzle) Spent Fuel Pool Water Temperature Suppression Pool Pressure
mm (above the top ofatv ul
of active fuel)
-1650 (A)
-1650 (B)
-1500 (A)
-1700 (A)
-2250 (B)
'C kPa
48.0 Below the scale Fresh water is injected continuously into the reactor pressure vessel through fire
No Data 172.2
Adding water to Reactor Pressure Vessel
Adding Not adding * Unknown
Fresh water is injected continuously into the reactor pressure vessel through
Fresh water is injected continuously into the reactor pressure vessel through fire
Injection to RPV and the Spent Fuel Pool using make up water 09'h April 05:00 UTC
Injection to RPV and the Spent Fuel Pool using make up water 09th April 05:00 UTC
DatelTime of Data Acquisition
09th April 03:00 UTC
09t April 03:00 UTC
09th April 03:25 UTC
All pressure values are absolute pressure (pressure including normal atmospheric pressure) (B) and (C) refer to three measurement instruments
** (A),
Daiichi and Daini On-Site Monitoring
Updated dose rate data for the on-site monitoring stations at the Daiichi site from 22 March to 9
April and the Daiini site from 26 March to 9 April are shown on the graphs below. A continuing downward trend in dose rates can be observed1 . Dose rate measurements for Fukushima Daiichi from 15 March to 21 March and for Fukushima
Daiini from 15 March to 25 March are available in previous status reports.
Fukushima Dal-Ichl Dose Rate Measurements (mlcroSv/hr) - 22 March to 9 April 2011
Fukushima Oai-ini Dose Rate Measurements (microSv/ hr) - 22' March to 09 April 2011
Teoeaiono h
+~ ~~ . . ....... ~ ~......
oioigpit
+....... ........... .............. l i... ...........
. .......... .. -
uvysain
etrdo
Off-site Dose Rate Monitoring Dose Rate Monitoring in Prefectures Measurements of gamma dose rates in all the prefectures are being taken continuously. Since 13 March, the dose rates show in general a decreasing trend. The graph below displays the dose rates from 25 March to 8 April in seven prefectures. Dose rate data prior to these dates can be found in previous reports.
External Gamma Dose Rate from 25 March 2011 15:00 UTC to 08 April 2011 07:00 UTC
~-Fbaraki
0.300 t-Gumma(Maebashi) Saitama(Saitama) 0.250 0 250-Chiba (Ich ihra) .-. TokYo(ShinjYuku)
~~'-"~KanagawaCiaai 0200
S0.100
0.000 'V 'Vp "n 'V1'3>
"4, "4
Q .) I_
The graphs below display the most recent gamma dose rates in all 47 prefectures. On 6 April dose rates in Fukushima were 2.3 pSv/hr, while in Ibaraki they were 0.15 pSv/hr. In the other 45 prefectures, gamma dose rates were less than 0.1 pSv/hr. Typical normal background levels are in the range 0.05 to 0.1 pSv/hr. PLEASE NOTE THAT THE UNITS ARE IN NANOSIEVERT PER HOUR USING A LOGARITHMIC SCALE
External Gamma Dose Rate (nSv/h) on 8 April 2011 in the 47 Perfectures Log scale
itlili i U iIniNiNN
On 30 March, MEXT announced that, in cooperation with universities and colleges of technology, it was commencing a program to measure the gamma dose rate in air on campuses located in major cities. Data covering the period 5 April to 8 April are now available. Measurements are now being made in 27 cities in 14 prefectures. In 17 cities, all measurements are below 0.10 pSv/h. In a further four cities, at least one measurement is in the range 0.10 to 0.15 pSv/h - these cities are Sendai, Yonezawa, Tsuruoka and Ovama. In the cities of Tsukuba, Kirvu and Chiba at least one of the measurements has been in the range 0.10 to 0.21 ISv/h, and in the range 0.10 to 0.3 ISv/h for Kisazeru and Bunkyo. In Fukushima City, the measurement range is 0.40 to 0.60 pSv/h. Typical normal background levels are in the range 0.05 to 0.10 pSv/hr.
Dose Rate Monitoring in Fukushima Updated dose rate monitoring data in and around Fukushima prefecture is given below for 9 th April. The evolution of dose rates from 18th March to 91h April for four sampling locations at different distances from the Fukushima Daiichi site is also displayed.
Readings at Monitoring Post out of Fukushima Dai--ichi NPP
Monitoring Time April 9,
-22-2424
Unit: g Sv per hour
Readings at Monitoring post out Fukushima Dai-ichi
R,4~8o~e MOnlOooe 00101 *1 P001 ~ 0~ 0h~NPP
= 100 0
.lpoifl 32 (300roj
*peifl
331(30K.)
-'~~~ePOWo ISlKl
.$ 5
~33 _5
* ' d~04 0,9~. o'~
Deposition in Prefectures MEXT reports areal concentration for the daily deposition of 1-131 and Cs-137 in the 47 prefectures of Japan. Samples are collected over a 24 hour period from 00:00 UTC to 00:00 UTC the following day. They are then collected and analyzed for the presence of the 1-131 or Cs-137. The tables below present the prefectures where levels have been-detected above the minimum detectable levels in the period of 1 to 8 April. The dates presented are the reporting date and provide the deposition levels from the previous day. It should be noted that the Miyagi prefecture has been unable to report deposition results due to damage incurred due to the 11 March earthquake. On occasions some prefectures have not been able to submit their results by the time that the reports are compiled. Prefectures not listed have not measured values above the minimum detectable levels during the period 1 to 9 April. Blank cells, with a grey background, indicate that there were no levels of the radionuclide detected. Cells containing a "-" indicate that results are yet to be reported for that prefecture on that day or the equipment was under maintenance. Daily Deposition of 1-131 Detected in the Prefectures of Japan (Bq/m 2)
1-Apr 25.7
>),~
7-A r
8-Apr 17.8
Akita(Akita
58 28 45
Fukushima Ibaraki
<,.';
10 3.4 5.3 8.2
20 3.8 5.4 6.2
Gunma(Maebashi) Saitama(Saitama) Chiba(ichihara) Tokyo(Shinjyuku) Kanagawa(Chigasaki)_ Ishikawa(Kanazawa)
7 4.1 18 14 39 6.8 38 : 13_1
4.1 12 21 2.. 2"
3.1 16 22 20
2.9 8.1 5.25
7.8 12.0 16.0 8._9
,)74";'X
. 4.8
098 11 .
Daily Deposition of Cs-137 Detected in the Prefectures of Japan (Bql/m 2 )
Location Iwate(Morioka) Akita.Akita.'
Yamagata(Yamagata) Fukushima
, A,7,
6-Apr 19
8-Apr 4.98
9-Apr 3.3
Ibaraki Tochigi(Utsunomiya) Gunma(Maebashi) Saitama(Saitama) Chiba(Ichihara) Tokvo(Shinivuku)
Kanagawa(Chigasaki) Yamanashi(Kouhu) Shizuoka(Shizuoka)
26 60 4.7 25 76 26
5.9 2.9 3.4
7 ;21
15 57 10 12 25 8
5.6 11 10 5.6
46 7.4 18 23 18
41 16 15 5.9
42 370.0 38 :,,17 7.2 ," 12 13 77.0 9.7 18 12.0 10.3 1 AJ <X
Page 11 of25
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17pk/~. 26 12 32
Y 14 13 TOKYO
Monitoring of the Marine Environment TEPCO Monitoring Programme Seawater (surface sampling) is being monitored by TEPCO at a number of near-shore and offshore monitoring locations. The near-shore sampling point for Daiichi Units 1 - 4 is located 330 m south of their common discharge point. The near-shore sampling point for Daiichi Units 5 - 6 is located 30 m north of their common discharge point. At Daini site, near-shore samples are being collected at two locations: directly north of the common discharge point of Daini, and close to Iwasawa Beach, which is south of Daini NPP. The latter monitoring point is 16 km south of Daiichi NPP on the northern boundary of TEPCO's Hirono thermal power plant. These points are identified as sampling locations 1, 2, 3 and 4. Monitoring data is available for these four near-shore sites from 23rd March. Starting from 2 nd April, TEPCO collected samples at three additional sampling points. These three sampling locations lie on a north-south transect that runs parallel to the coast, but at a distance of 15 km from the shore. The three points lie directly opposite Daiichi NPP, Daini NPP and Iwasawa Beach and are identified as sampling locations 5, 6 and 7. On 4 th April, a further set of three sampling points, also at 15 km from the shore, was added. These are identified as sampling locations 8, 9 and 10. All six sampling locations 5 to 10 lie along a north-south transect. Map 1: TEPCO Seawater Sampling Locations
Sampling 1-2 times a day at points below C!)Around south discharge canal of 1 F ( approx. 330m from Unitl-4 canal) (ZAround north discharge canal of 1F
C approx. 30m from Unit 5&6 canal)
Sampling Point (3lAround north discharge canal of 2F ( approx. 1Okm from iF) (_4VAround Iwasawa Sea Shore ( approx.16km from 1F) ,,V15km from 1F (V15km from 2F (7)15km from Iwasawa Sea Shore (S1~i5kin from Hirono Town ()15km from MinamI-Soma City (115km from Ukedogawa River
Page 13 of25
TEPCO Seawater Results On 5th April, NISA provided the first set of data for TEPCO sampling points 8, 9 and 10. These are given in the table below. The concentrations observed are similar to those found at TEPCO sampling points 5, 6 and 7 which are also 15 km from the shore.
1-131 (Bq/I) Cs-134 (Bq/I) Cs-137 (Bq/l)
Point 8 98 57 59
Point 9 57 18
Point 10 200 65 71
What follows are bar charts showing 1-131 and Cs-137 concentrations in seawater samples collected and analyzed by TEPCO - refer to Map 1 above for sampling locations. On some days, two samples were collected a few hours apart and analyzed separately. Only results for the sample with the larger concentrations on that day are shown in the charts below.
1-131 and Cs-137 concentrations in seawater (TEPCO monitoring)
Sea water mncent.aeonaroundsouth discharge canal of FukushimaDal-chf NPP(approx 330m from unets 1-4 canal TEPCO 1 nal Sea water cncenteationaround north discharge Ca of FukushimaDal-ichi S0m 30m. from unctc 5 & 6 canal) NPP (app 2 TEPCO
... .i .....i..........i....... .. '. . . . . . . . ..... ......... ....... ............ ... ...
.i ..... .
Sea water concentration around noeth discharge of FukushimaDal-ni NPP (approx. 10km from Oai-nl NPP) 3 TEPCO
SSea [ )
Iwasawa sea shere water concentration arnund NPP( Sal-el (prec6lkes free, Fckcshim~a TEPCO 4
....C C .... . C
......... I....... .... . I. I.... ....
eawater concen,tation off-shore (15k. fromFokoshinsa Dai~ohl NPP)
Sea water concentration off shore (15kmn from FukushimaDai-ni NPP) TEPCO 6 .......... . ...................... . .z .........................................i ................................. . .. .. y
_ ....... ................
... ..... ..... .. ..
I ~ ..... ..
Sea water oncentraffonoffshore sea (15kmfrom lwasawa shore) TEPCO7
Sea water concentration off shore (15kmfrom HironoTown) TE PCOa
... . . ....... .. .. .. ..
!..... ...... ............... io ................................ .
.~~~~~~ . ................... i.... ............ ................................ i~~~~~~i~~~~~o,0-I~ ~~~
is . .. . . . .. . i..
'. !- ... i ..................... ................ ............[... ...... .. ................. ..
............... . . . . ......
Sea water concentrafon offshore (15kmfrom UkedogawaRiver) TEPCO 10
Sea water concentration off shore from 115kmn MInrani-SemaCity) TEPCO9
S. ........................................................................
~*~~*7ji.........
+...+I ..........
Page 15 of25
MEXT Off-shore MonitoringProgramme MEXT initiated the off-shore monitoring programme on 2 3 rd March. Initially, the monitoring was carried out at 8 points lying on a north-south transect parallel to the coast and 30 km off-shore, as shown as points 1 to 8 on the map below. Sampling points 1 to 8 are separated by about 10 km. On 28th March, points 9 and 10 were added to the off-shore sampling scheme. Points 8, 9 and 10 lie in one line perpendicular to the coast. Points 8 to 10 are also separated by about 10 km. On 4th April, MEXT added two sampling points to the north and west of sampling point 1. These are referred to as points A and B on the map below. Monitoring at off-shore sampling points consists of: 1) 2) Measurement of ambient dose rate in air above the sea; Collection and analysis of surface samples of seawater;
3) Collection and analysis of samples of seawater collected at 10 meters above the sea bottom. Map 2: MEXT Seawater Sampling Locations
MEXT Seawater Results 1-131 and Cs-1 37 concentrations in seawater (MEXT off-shore monitoring)
Act ivty -enctratl- n,-Sc We
MfxT I
lAciity concentrtilon in sea water MEATr Z
..... .. ... .... .............
_.... -....
......... .I ... .....
... ...... ... .... .... . .. . .
citd,tt1tl.f seAAate in MEXT 2
Activity concentration in sea water MEXT4
. ....... --..... i .. .... ... ... T ..... .. 0.. ... ... .. . ..... ...... ... .... ... .. . t .. i -.............. .... ................
0. A0000
Activityconcentration insea water
Activity concentrat!onin seawater
. . ... ... . ..... ... ........... ..
.. .. ! !... . .............. .. ........................ . . . . . . .................... . . . . . . ..................... . . . ....
Page 17 of25
Activity concentration insea waner MEXT 7
Activity concentration sea water In MEXT a
[rLILJ I
Activity ccncentratlinInsea water MEXT 9
. ............ . ..... ..... M. ... . ..
i..... .. . .T .. ........... .......
... ......... i ..... o........ 1 .... I....... . ......................... ...
i tycnetaio insa ae Acti
Activity concentration In sea water MEXT 10
....... _ . ._.......
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Page 18 of25
Radioactivity in Drinking Water, Milk and Foodstuffs Radioactivity in Food Data related to food contamination was reported on 7 April by the Japanese Ministry of Health, Labour and Welfare. These reported analytical results covered a total of 63 samples taken from 5-7 April. Analytical results for 62 of the 63 samples for various vegetables, spinach and other leafy vegetables, various meats (beef, pork, horse, chicken), unprocessed raw milk and seafood in nine prefectures (Chiba, Fukushima, Gunma, Hyogo, Ibaraki, Kanagawa, Niigata, Tochigi and Yamagata) indicated that 1-131, Cs-1 34 and/or Cs-1 37 were either not detected or were below the regulation values set by the Japanese authorities. One sample of spinach (grown outdoors) taken on 6 April in Ibaraki prefecture was above the regulation value set by the Japanese authorities for 1-131.
Food Restrictions Summary As of 4 th April, food restrictions (distribution and/or consumption) are in place in four prefectures (Fukushima, Ibaraki, Tochigi, and Gunma) and in certain locations in Chiba prefecture (Katori City, Tako Town and Asahi City). In Fukushima, there are restrictions on the consumption of leafy vegetables, headed and non-headed leafy vegetables (e.g. spinach, komatsuna, cabbage), and flower-headed brassicas (broccoli, cauliflower). There are also restrictions on the distribution of headed and non-headed leafy vegetables, flower-headed brassicas (including turnips), spinach, kakina and unprocessed raw milk produced in the prefecture. In Ibaraki, there are restrictions on the distribution of unprocessed raw milk, parsley, spinach and kakina produced in the prefecture. In Chiba, there are restrictions on the distribution of spinach produced in Katori City and Tako Town.. There are also restrictions on the distribution of spinach, chingensai, shungiku, sanchu, celery and parsley produced in Asahi City. In Tochigi there are restrictions on the distribution of spinach and kakina produced in these prefectures. On 8th April the Ministry of Health, Labour and Welfare reported that the Emergency Response headquarters had approved the lifting of restrictions on the distribution of unprocessed raw milk in certain locations in Fukushima prefecture (city of Kitakata and the towns of Aizumisato, Bandai, Inawashiro, Michima, Minamiaizu and Simocio) and on the distribution of spinach and kakina in Gunma prefecture.
Summary of Radionuclide Test Results carriedout since 19 March 2011 (valid 7 April 2011)
Food origin (Prefecture) Food group Number of foods Food concerned Number of (numbers) food samples 'positive at levels tested exceeding provisional regulation limits (action levels) " ___ _ "_ .... ____._:.___ 18 raw milk (18) 125 252 79 spinach (26), broccoli (19), rapeseed (6) komatuna (4), kukitachina (4), cabbage (4), shinobuhuyuna (3), santona (2), kosaitai (3), turnip (2), chijirena (1),hana wasabi (1), bitaminna (1), mizuna (2), shiitake(1) 30 . 17 5 429 25 148 5 2 23 2 205 6 62 68 4 95 99 4 57 61 6 47 97 5 36
_____________ ___________"_
milk vegetable
meat egg fishery products subtotal milk vegetable meat egg fishery products others subtotal milk vegetable subtotal milk vegetable subtotal milk vegetable subtotal milk vegetable
raw milk (5) spinach (28), parsley (6), mizuna (1), red leaf lettuce (1)
spinach (9), garland chrysanthemum (2)
spinach (2), kakina (1)
garland chrysanthemum (4) qing-geng-cai (1), celery (1), sanchu asian lettuce (1), parsley (2), spinach (2)
fishery products subtotal milk vegetable fishery products subtotal milk
16 69 2 14 2 18 7
komatuna (1)
Foodorigin (Prefecture)
Number of food samples ..
Number of foods positive at levels 7.
r.Tegulation
Food concerned (numbers)
vegetable meat fishery products subtotal milk vegetable subtotal milk vegetable subtotal milk vegetable subtotal milk vegetable subtotal vegetable subtotal vegetable subtotal vegetable subtotal vegetable subtotal
17 1 3 28 1 10 11 2 4 6 4 98 102 1 5 6 2 2 2 2 2 2 3 4 1112
limits (action levels)
Shizuoka Ehime Kyoto Hyogo total
Restriction of distribution and/or consumption within the whole and/or part of prefecture is applied to the underlined foods. X. Investigation on the result of 31 March is ongoing_
Radioactivityin Drinking Water As of 7 th April, the one remaining restriction on the consumption of drinking water applies to only one village in the Fukushima prefecture, where the restriction applies only to infants. The table below summarizes the history of the imposition and lifting of restrictions. The table below shows the Press release of the Minister of Health, Labour and Welfare on 4t" April.
< By prefecture > Water supply utility etc. litate-muta (village) Small-Scale Water Supply Utility, (litate-mura (,illage)) Date-shi (city)/Tsuldtate Small-Scale Water Supply Utility (Date-shi (city)) Kawarnata-ttachi (town) Water Supply Utility (Kawamnata-machi (town)) Fuk-ushima Konyama-shi (city) Water Supply Utility (Koriyama-shi (city)) Minamisoma-shi (city) Water Supply Utility (Minatnisoma-shi (city)) Tamura-shi (city) Water Supply Utility (Tanmura-shi (city)) Iwali-shi (city) Water Supply Utility (Iwak-shi (city)) Tokai-mura (village) Water Supply Utility (Tokai-mura (village))
Suifu di;=ct Fokhmbu (nmothei area) Smaill-Scale Water SVpp Uthty (FHitadi-ota-si (city)) -
hifants start FcInce,
3/21 3/22 3/27 3/22 3/22 3/22 3/22 3126 3/23 3/23 3/23 3/24 3/24 3/24 3/25 3/25 3/23 3/26 3/23 3/26 3/23 3125 3/25 3/26 4/1 3/25 3/25 3/30 3/23 3/28 3/31 3/26 3/26 3/27 3/26 3127 3/25 3/26 3/25 3/27 3/26 3/27 3/24 3/25 3/26
General public Start 3/21 Cancel 4/1
Kita-Ibaraki-shi (city) Water Supply Utility (Kita-3haraki-shi (city)) Ibaraka Hiachi-shi (city) Water Supply Utility (Hitachi-shi (city)) Kasama-shi (city) Water Supply Utility (Kasama-shi (city)) Koga-shi (cait) Water Supply Utility (Koga-shi (city))
Ibaraki-Ken-Nan Water Supply Utility (Tonde-shi (city)) Chiba Prefecture Water Supply Utility (Chiba Nogiku-no-sato Water Treatment Plant and Kuriama Water Treatment Plant) Chiba (Kashiwai Water Treatment Plant (East side facility)) Kitachiba-Koiki Bulk Water Supply Utility [nba-gun (county) Bulk Water Supply Utility Tokzyo
Tokyo Water Supply Utility (23 wards and 5 cities) Utsunomiya-shi (city) Water Supply Utility (Utsunzomiya-shi (city)) Nogi-machi (town) Water Supply Utility (Nogi-machi (town))
h'Ifants" refer to informing that infants refrain from intaking tap water (including giving infants formula milk dissolved by tap water, etc-); "General public" means informing residents to refrain from drinking tap water. In addition, "Start" and "Cancel" refer to the "beginning" and "cancellation" of the public announcement of relavant information (public relations), respectively. The table was created based on information confirmed by the MHLW by the tume of issuance of this announcement.
Plutonium in Soils NISA has reported the results of plutonium measurements made on soils collected on 2 5 th March and 28th March at the Fukushima Daiichi site* Four samples were collected on 2 5 th March and three samples on 2 8th March. Each of the samples was analyzed for Pu-238 and Pu-239,240. Three of the seven samples were below the limit of detection for Pu-238 and four were below the limit of detection for Pu-239,240. The highest concentrations observed were 0.26 Bq/kg for plutonium-238 and 0.12 Bq/kg for Pu-239,240. The average ratio (three samples) of Pu-239,240 to Pu-238 was approximately 1.9. The levels found are typical of those expected in Japan as a result of the former testing of nuclear weapons. These plutonium concentrations all appreciably smaller than the clearance concentration levels published in IAEA Safety Standards Series No. RS-G-1.7. Monitoring of Workers and the Public NISA reported that, as of 2 nd April, screening was implemented for 122,613 people in Fukushima prefecture. There! were 102 people whose value was more than 100,000 cpm. After re-measurement following removal of outer clothing, the value decreased to less than 100,000 cpm. On 3 rd April NISA reported that between 28h and 30th March, thyroid monitoring was performed on 946 children, aged between 0 and 15, at the local government office of litate Village and the city hall of Kawamata City. All measurement results were below Japan's established criteria of 0.2 pSv/h. On 7th April NISA confirmed that among approximately 300 workers at the Fukushima Daiichi plant, 21 have received accumulated doses exceeding 100 mSv in the period related to this emergency. No worker has received a dose above Japan's guidance value of 250 mSv for restricting the exposure of emergency workers. The situation therefore remains unchanged from 3 1st March. Casualties The 04:30 UTC 3 rd April report from the Nuclear Emergency Response Headquarters (Prime Minister's Office) confirmed that two TEPCO workers, identified as missing since 1 1th March, had been found dead. These deaths were not related to exposures to ionizing radiation.
ANNEX Status of Nuclear Facilities as the result of Earthquake of
The IAEA confirms that an earthquake occurred in Japan at 14:32 UTC 7"' April. The IAEA International Seismic Safety Centre has rated it as a 7.1 magnitude, revised from an initial 7.4 magnitude. The epicenter of the earthquake was 20 km from the Onagawa nuclear power plant and approximately 120 km from the Fukushima Daiichi and Daini nuclear power plants, off the coast of Miyagi Prefecture. The IAEA has been in contact with NISA and can confirm the updated status of the following nuclear facilities: Fukushima Daiichi NPP NISA confirms that no changes have been observed at the on-site radiation monitoring posts. The injection of water into the reactor pressure vessels of Units 1, 2 and 3 was not interrupted. Fukushima Daini NPP NISA confirms that no changes have been observed of the readings at the on-site radiation monitoring posts at 21:00 UTC 8h April. After inspecting each unit, it was confirmed at 09:00 UTC 8th April that no unusual event occurred. Onagawa NPP All reactors have been in cold shutdown since the 11"' March earthquake. NISA has confirmed that three out of the five lines supplying off-site power to the site were lost following the 7'h April earthquake, although one line was under repair when earthquake occurred. Off-site power continued to be supplied through a line after the 7"' April earthquake and two lines have restored at 81h April. As of 9:45 UTC 8h April, off-site power continues to be supplied through four lines. Cooling of the spent fuel pool was temporarily lost, but has subsequently been restored. The water of the spent fuel storage pool was overflowed but water stayed in the radiation controlled area. No change has been observed in the readings from the on-site radiation monitoring post. The status of the plant is currently being checked. Tokai Daini NPP Tokai Daini nuclear power plant remains in cold shutdown since the 11" March earthquake. No abnormality has been observed. Higashidori NPP NISA has confirmed that the Higashidori NPP was shutdown and in a maintenance outage at the time of the 7"' April earthquake. All the fuel had been removed from the reactor core and stored in the spent fuel pool. Off-site power was temporarily lost. Emergency power supply to the site operated as expected until off-site power was restored. Cooling of the spent fuel pool was not impacted. On 18:30 UTC 7 th April, one off-site power was restored. After that, oil leak was found out on the emergency diesel generator B at 5:55 UTC 8"' April, so that it was stopped at 6:06 UTC 8" April. At that time the other two emergency diesel generators were stopped due to inspection. At 6:59 UTC 8' April, two lines supplying off-site power were restored. On 22:00 UTC 8t' April, it was confirmed that emergency diesel generator B was
available. No change has been observed in the readings from the on-site radiation monitoring post.
Tomari NPP (in Hokkaido) At the time of the 7h April earthquake Tomari Unit 1 and 2 were in operation. Following the earthquake, the Hokkaido Electric Power Company reduced the generating power to 90% of capacity, but has recovered the operation at rated power. Rokkasho Reprocessing Plant NISA confirms that Rokkasho reprocessing facility (in pre-service inspection) and uranium enrichment facility (in outage) lost off-site power. Emergency power supply ensured cooling of the fuel storage pool. Off-site power supply resumed at 00:44 UTC 8th April.
Conditions of Fukushima Dai-ichi Nuclear Power Station Unit I
(As of 12:00 April 7th, 2011
Spent Fuel Pool Water Temperature--C Condition: Indicator failure
Major Events after the earthquake
Reactor Pressure A 0.478MPa* Reactor Pressure B 0.859MPa* Condition : No large fluctuation *converted to absolute pressure Reactor Water Level A -- 1,650mm Reactor Water Level B -1,650mm Condition: No flooding of top of active fuel until the above level Reactor Water Temperature Condition: No data available C
Reactor Pressure Vessel (RPV) Temperature: Feedwater Nozzle Temperature :223.8 0C Temperature at the bottom head of RPV :116.9 0 C
Pressure 0.165MPa
Condition: No large fluctuation S/P* 4 Water Temperature Condition: No data available S/p* 4 Pressure 0.150MPa Condition: No large fluctuation C
14:46 Under operation, Automatic shutdown by the earthquake Report based on the Article 10 (Total loss of A/C 1 1 th 15:42 power) 1 1 th 16:36 Occurrence of the Article 15 event (Inability of water injection of the Emergency Core Cooling System 1 2 th 01:20 Occurrence of the Article 15 event (Unusual rise of the pressure in PCV) th 10:17 Started to vent. 1 2 1 2 th 15:36 Sound of explosion 1 2 th 20:20 Started to inject seawater and borated water to core. The amount of injected water to the Rector 2 3 rd 02:33 Core was increased utilizing the Feedwater Line in addition to the Fire Extinguish Line. (2m 3/h -*18m 3/h) 09:00 Switched to the Feedwater Line only.(18m 3/h -llm 3/h) 2 4 th 11:30 Lighting in the Central Control Room was recovered. th 15:37 Started fresh water injection. 2 5 2 9 th 08:32 Switched to the water injection to the core using the temporary motor-driven pump. 31st 12:00 - 2 nd 15:26 Started to transfer the stagnant water from the Condensate Storage Tank (CST) to the Surge Tank of Suppression Pool Water (SPT) 3 1 st 13:03-16:04 Water spray by Concrete Pump Truck (Fresh water) 3 rd 12:02 The power supply to the temporary motor-driven pump was switched from the temporary power supply to the external power supply. 3 rd 13:55 Started to transfer the water from the condenser to CST. 6 th 22:30 Started the operation for the injection of nitrogen to PCV. Confirmed starting the injection of nitrogen to 7 th 01:31 PCV.
Residual Heat Removal System Emergency Diesel Generator Primary Containment Vessel Suppression Pool
Current Conditions : Fresh water is being injected to the Spent Fuel Pool and the core ~d~f~i~ comitteefo--N-ucl~Teg adok ulaEeg ado
Conditions of Fukushima Dai-ichi Nuclear Power Station Unit 2 (As of 12:00 April 7th, 2011) IMajoroEvents.after the earthquake.
PoolCooling System
Spntue eactor Pressure
th 14:46 Under operation, Automatic shutdown by the earthquake
Spent Fuel Pool Water Temperature 51.0
RatrPesr 'A
0.092MPa* Condition : No lal B 0.085MPa* *converted to rge fluctuation absolute evel Reactor Water LI A
-- 1,500m m
Condition : No flc loding active fuel to t|
of top of he above level
Current Conditions: Fresh water is being injected to the Spent Fuel Pool and the core
15:42 Report based on the Article 10 (Total loss of A/C power) 16:36 Occurrence of the Article 15 event (Inability of water injection of the Emergency Core Cooling System ) 131h 11:00 Started to vent. 14 th 13:25 Occurrence of the Article 15 event (Loss of reactor cooling functions) 14th 16:34 Started to inject seawater to the Reactor Core. 14th 22:50 Occurrence of the Article 15 event (Unusual rise of the pressure in PCV) 1 5 th 00:02 Started to vent. Sound of explosion 15 th 06:10 15 th around 06:20 Possible damage of the suppression chamber 20th 15:05-17:20 Approximately 40 ton seawater injection to the Spent Fuel Pool (SFP) via the Fuel Pool Cooling Line (FPC) 20th 15:46 Power Center received electricity. 21tt 18:22 White smoke generated. The smoke died down and almost invisible at 07:11 March 2 2 -d. nd 16:07 Injection of around 18 tons of seawater to SFP 2 2 25th 10:30- 12:19 Sea water injection to SFP via FPC 2 6th 10:10 Started to inject fresh water to the Reactor Core. 26th 16:46 Lighting in the Central Control Room was recovered. 27th 18:31 Switched to the water injection to the core using the temporary motor-driven pump. 29t' 16:30-18:25 Switched to the temporary motor-driven pump injecting fresh water to SFP. 29th 16:45-1t 11:50 Transferred the water from the Condensate Storage Tank (CST) to the Surge Tank of Suppression Pool Water (SPT) 30th 9:25-23:50 Confirmed malfunction of the temporary motor-driven pump injecting fresh water to SFP(9:45). Switched to the injection using the fire pump Truck, but suspended as cracks were confirmed in the hose. (12:47, 13:10) Resumed injection of fresh water(19:05) IVt 14:56-17:05 Injection of fresh water from FPCto SFP using the temporary motordriven pump. 2nd around 9:30 The water, of which the dose rate was at the level of more than 1,OOOmSv/h, was confirmed to be collected in the pit located near the Intake Channel of Unit 2. The outflow from the lateral surface of the pit into the sea was also confirmed. 2nd 17:10 Started to transfer the water from the condenser to the Condensate Storage Tank (CST). rd 12:12 The power supply to the temporary motor-driven pump was switched from the 3 temporary power supply to the external power supply. 3 rd 13:47- 14:30 20 bags of sawdust, 80 bags of high polymer absorbent and 3 bags of cutting-processed newspaper were put into the Pit for the Conduit. th 7:08-7:11 Approximately 13kg of tracer (bath agent) was put in from the Pit for the 4 Duct for Seawater Pipe. th 11:05- 13:37 Injection of fresh water from FPC to SFP using the temporary motor4 driven pump. 5th 14:15 Tracer is confirmed to outflow through the permeable layer around the pit into the sea. 15:07 Started to inject coagulant. 6th around 5:38 The water outflow from the lateral surface of the pit was confirmed to stopped. 7 th 13:29- 14:34 Freshwater injection to SFP via FPC (approx. 36 ton)
(Editorial committee for Nuclear Energy Handbook, Nuclear Energy Handbook)
Conditions of Fukushima Dai-ichi Nuclear Power Station Unit 3 Major Events after the earthquake ( As of 12:00 April 7th, 2011 )
1 1 th 1 1 th
*1 Residual Heat Removal System *2 Emergency Diesel Generator
*3 Primary Containment Vessel *4 Suppression Pool
-I,/ \1
-N/~
Current Conditions: Fresh water
is being injected to the Spent Fuel Pool and the core
14:46 Under operation, Automatic shutdown by the earthquake 15:42 Report based on the Article 10 (Total loss of A/C power) 1 3th 05:10 Occurrence of the Article 15 event (Inability of water injection of the Emergency Core Cooling System) 08:41 Started to vent. 13' 13th 13:12 Started to inject seawater and borated water to core. 14th 05:20 Started to vent. 14th 07:44 Occurrence of the Article 15 event (Unusual rise of the pressure in PCV) 1 4 th 11:01 Sound of explosion 16th around 08:30 White smoke generated. 1 7 th 09:48-10:01 Water discharge by the helicopters of Self-Defense Force 17th 19:05-19:15 Water spray from the ground by High pressure watercannon trucks of Police 1 7 th 19:35- 20:09 Water spray from the ground by fire engines of SelfDefense Force 1 8 th before 14:00-14:38 Water spray from the ground by 6 fire engines of Self-Defense Force Water spray from the ground by a fire engine of the US 1 81h -14:45 Military th 00:30 -01:10 Water spray by Hyper Rescue Unit of Tokyo 1 9 Fire Department th 14:10 - 20th 03:40 Water spray by Hyper Rescue Unit of Tokyo Fire 1 9 Department 2 0 th 11:00 Pressure of PCV rose(320kPa).Afterward fell. th 21:36 - 211t 03:58 Water spray by Hyper Rescue Unit of Tokyo Fire 2 0 Department 211t around 15:55 Grayish smoke generated and was confirmed to be died down at 17:55. 2 2nd 15:10 -16:00 Water spray by Hyper Rescue Unit of Tokyo Fire Department and Osaka City Fire Bureau. 2 2 nd 22:46 Lighting in the Central Control Room was recovered. 2 3 rd 11:03 - 13:20 Injection of about 35ton of sea water to the Spent Fuel Pool (SFP) via the Fuel Pool Cooling Line (FPC) 2 3 rd around 16:20 Black smoke generated and was confirmed to died down at around 23:30 and 2 4th 04:50. 2 4 th 05:35-16:05 Approximately 120 ton sea water injection to SFP via FPC 2 5 th 13:28-16:00 Water spray.by Kawasaki City Fire Bureau supported by Tokyo Fire Department 2 5 th 18:02 Started fresh water injection to the core. 2 7 th 12:34-14:36 Water spray by Concrete Pump Truck 2 8 th 17 : 0-31t around 8:40 Transferring the water from the Condensate 4 Storage Tank (CST) to the Surge Tank of Suppression Pool Water (SPT) 2 8th 20:30 Switched to the water injection to the core using a temporary motor-driven pump. 2 9th 14:17-18:18, 3 1 st 16:30-19:33, 2 nd 09:52-12:54, 4 th 17:03~19:19 Water spray by Concrete Pump Truck (Fresh water) 3 rd 12:18 The power supply to the temporary motor-driven pump was switched from the temporary power supply to the external power supply. 7 th 06:53 -'"08:53 Water spray by Concrete Pump Truck (Fresh water) (Around 70 ton)
Conditions of Fukushima Dai-ichi Nuclear Power Station Unit 4
( As of 12:00 April 7th, 2011 )
Majorevents after the
I earthquake i
In periodic inspection outage when the earthquake occurred 1 4 th 04:08 Water temperature in the Spent Fuel Pool (SFP), 84 0C 1 5 th 06:14 Confirmed the partial damage of wall in the
09:38 Fire occurred in the 3 rd floor. (12:25 extinguished) 1 6 th 05:45 Fire occurred. TEPCO couldn't confirm any fire on the ground. (06:15) 20 th 08:21-09:40 Water spray over SFP by SelfDefense Force 2 0 th around 18:30'- 19:46 Water spray over SFP by Self-Defense Force 211t 06:37-08:41 Water spray over SFP by SelfDefense Force 2 1st around 15:00 Work for laying cable to Power Center was completed. 2 2 nd 10:35 Power Center received electricity. 2 2 nd 17:17-20:32, 2 3 rd 10:00-13:02, 2 4 th 14:36'" 17:30, 2 5 th 19:05~22:07, 2 7 th 16:55-"19:25 Water spray by Concrete Pump Truck 2 5 th 06:05~10:20 Sea water injection to SFP via the Fuel Pool Cooling Line (FPC) 2 9 th 11:50 Lighting in the Central Control Room was recovered.
1 5 th 5
301h 14:04~18:33, 1st 8:28-14:14, 3rd 17:14";22:16,
th 17:35 ~ 18:22
Water spray by Concrete Pump Truck (Fresh water)
*1 Residual Heat Removal System *2 Emergency Diesel Generator *3 Reactor Pressure Vessel
Current Conditions: No fuel is in RPV*3 . Fresh water is being injected to the Spent Fuel Pool.
Conditions of Fukushima Dai-ichi Nuclear Power Station Unit 5 ( As of 12:00 April 7th, 2011 )
in periodic inspection outage
Condition: Recovery of heat removal function Temperature in the Pool: 36.0C
Reactor Pressure: 0.103MPa* Reactor Water Level: 1,801mm Reactor Water Temperature: 39.1 0C Condition: Pressure is under control. pressure *converted to absolute
Reactor Pressure Vessel Temperature: Monitoring by Reactor Water Temperature
Heat removal was carried out alternately with the water in the Reactor Core and in the Spent Fuel Pool. Current Conditions:
14:30 Cold shutdown 11:36 Receiving electricity from external power supply
*1 Residual Heat Removal System
17:24 Pump for Residual Heat Removal Seawater System (RHRS) was automatically stopped when the power supply was switched from the temporary to the permanent. 2 4 th 16:14 Repair of the RHRS pump was completed. 2 4 th 16:35 Started to cooling. 4 th 21:00 Started to discharge the groundwater with low-level
radioactivity in the Sub Drain Pit to the sea.
Conditions of Fukushima Dai-ichi Nuclear Power Station Unit 6 ( As of 12:00 April 7th, 2011 )
In periodic inspection outage The Emergency Diesel Generator (D/G) 6A was excluded from standby because of insulation resistance insulation drop.
19:27 Cold shutdown
2 2 nd 4 th
19:17 Receiving electricity from external power supply 21:00 Started to discharge the groundwater with lowlevel radioactivity in the Sub Drain Pit to the sea
X Heat removal was carried out alternately with the water in the Reactor Core and in the Spent Fuel Pool.
*1 Residual Heat Removal System (Editorial committee for Nuclear Energy Handbook, Nuclear Energy Handbook)
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