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1、,Information on Status of Nuclear Power Plants in,Fukushima,Japan Atomic Industrial Forum,Inc.,Policy on information and compilation,This JAIF-compiled information chart represents the situation,phenomena,and operations in which JAIF estimates and guesses the reactors andrelated facilities are,based
2、 on the latest data and information directly and indirectly made available by the relevant organizations when JAIFsupdating works done.Consequently,JAIF may make necessary changes to descriptions in the chart,once(1)new developments have occurred inthe status of reactors and facilities and(2)JAIF ha
3、s judged so needed after reexamining the prior information and judgments.JAIF will do its best to keep tracks on the information on the nuclear power plants quickly and accurately.,Safe,Safe,Safe,Safe,Evacuation,Remarks,Status of nuclear power plants in Fukushima as of 12:00,May 14th(Estimated by JA
4、IF),Power Station,Fukushima Dai-ichi Nuclear Power Station,UnitElectric/Thermal Power output(MW)Type of ReactorOperation Status at the earthquake occurredFuel assemblies loaded in Core,1460/1380BWR-3In Service-Shutdown400,2784/2381BWR-4In Service-Shutdown548,3784/2381BWR-4In Service-Shutdown548,4784
5、/2381BWR-4OutageNo fuel rods,5784/2381BWR-4Outage548,61100/3293BWR-5Outage764,Core and Fuel Integrity(Loaded fuel assemblies)Reactor Pressure Vessel structural integrityContainment Vessel structural integrityCore cooling requiring AC power 1(Large volumetric freshwater injection)Core cooling requiri
6、ng AC power 2(Cooling through Heat Exchangers)Building IntegrityWater Level of the Rector Pressure VesselPressure/Temperature of the Reactor PressureVesselContainment Vessel PressureWater injection to core(Accident Management)Water injection to Containment Vessel(AM)Containment Venting(AM),Damaged(5
7、5%*1)Damage and Leakage SuspectedDamage and Leakage SuspectedNot FunctionalNot FunctionalSeverely Damaged(Hydrogen Explosion)Lower than the bottom of fuelsGradually increasing/Decreased a littleafter increasing over 400 on Mar.24thDecreased a little after increasing up to0.4Mpa on Mar.24thContinuing
8、(Switch from seawater tofreshwater)Feed water to fill up the CV(started 4/27)Temporally stopped,Damaged(35%*1)UnknownDamage and Leakage SuspectedNot FunctionalNot FunctionalPartly openedFuel exposed partially or fullyUnknown/StableStableContinuing(Switch from seawater tofreshwater)Feed water to fill
9、 up the CV(planned)Temporally stopped,Damaged(30%*1)UnknownNot damaged(estimation)Not FunctionalNot FunctionalSeverely Damaged(Hydrogen Explosion)Fuel exposed partially or fullyUnknown/Gradually increasingStableContinuing(Switch from seawater to freshwater)Feed water to fill up the CV(planned)Tempor
10、ally stopped,No fuel rodsNot DamagedNot DamagedNot necessaryNot necessarySeverely Damaged(Hydrogen Explosion)SafeNot necessaryNot necessaryNot necessary,Not DamagedNot DamagedNot DamagedFunctionalFunctioning(in cold shutdown)Open a vent hole on the rooftop foravoiding hydrogen explosionSafeNot neces
11、saryNot necessaryNot necessary,Fuel assemblies stored in Spent Fuel Pool,292,587,514,1331,946,876,Fuel Integrity in the spent fuel poolCooling of the spent fuel pool,UnknownWater spray continues(freshwater),Unknownwater injection continues(Switch fromseawater to freshwater),Damage SuspectedWater spr
12、ay and injection continues(Switch fromseawater to freshwater),some of the spent fuel may have been damaged*3Water spray and injection continues(Switch fromseawater to freshwater),Hydrogen from the poolexploded(3/15),Not DamagedPool cooling capability was recovered,Main Control Room Habitability&Oper
13、abilityEnvironmental effect,Poor due to loss of AC power(Lighting and parmaeter monitoring restored in the control room at Unit 1 and 3 on Mar.24th,at Unit 2 on Mar.26th,at Unit 4 on Mar.29th)Status in Fukushima Dai-ichi NPS siteRadiation level:385Sv/h at the south side of the office building,16Sv/h
14、 at the West gate,as of 21:00,May 13th.,43Sv/h at the Main gate,as of 11:30,May 12th.Some radioactive nuclides(I,Cs,Pu,Am Cm and Sr)has been detected in soil sampled at the Fukushima site.Radioactive materials continues to be detected in samples corrected from underground water and sea water at or n
15、ear the site.Environmental monitoring has been enhanced.Radioactive Iodine and cesium have been detected in the seabed samples taken 15-20 km far from the plant from 15-20m deep.Level of radiation is 100 to 1,000 times above normal.(5/4)Influence to the peoples life,Not damaged(estimate),Radioactive
16、 material was detected from milk,agricultural products and seafood from Fukushima and neighboring prefectures.The government issued order to limit shipment and intake of some products.Radioactive iodine,exceeding the provisional legal limit for drinking water,was detected from tap water sampled in s
17、ome prefectures.All the restrictions of intake of the water,which was once issued by the govedrment,have been lifted by May10th.Radioactive cesium was detected in the sludge from a sewage treatment plants,one of which is 50 km far from the power station.Small amount of strontium was detected in some
18、 samples of soil and plants corrected in the area,20-80 km far from the power station.Radioactive Cs above the legal limits have been detected in tea leaves harvested in 3 municipalities in Kanagawa Pref The pref government has asked the 3 municipalities and the local farmers association to voluntar
19、ily halt shipments(5/11)Shall be evacuated for within 3km from NPS,Shall stay indoors for within 10km from NPS(issued at 21:23,Mar.11th)Shall be evacuated for within 10km from NPS(issued at 05:44,Mar.12th)Shall be evacuated for within 20km from NPS(issued at 18:25,Mar.12th)Shall stay indoors(issued
20、at 11:00,Mar.15th),Should consider leaving(issued at 11:30,Mar.25th)for from 20km to 30km from NPSThe 20km evacuation zonearound the Fukushima Daiichi NPS is to be expanded so as to include the area,where annual radiation exposure is expected to be above 20mSv.People in the expanded zone are ordered
21、 to evacuate within a month or so.People living in the 20 to30km and other than the expanded evacuation area mentioned above,are asked to get prepared for staying indoors or evacuation in an emergency(announced on Apr.11th and issued on Apr.22nd).,INES(estimated by NISA),Level 7*2 Cumulative amount
22、of radioactivity from Fukushima Diichi NPS has reached the level to be classified as level 7.Total amount of radioactive materials released to the environment in this accident is one tenth as much as one in the Chernobyl accident so far.,Level 3*2,Progress of the workktto restore cooling functionTEP
23、CO announced its plan to bring the damaged reactors to a stable condition known as a cold shutdown in about six to nine months,a situation in which water temperatures inside the reactors have been stably brought below 100 C.(4/17)High radiation circumstance hampering the work to restore reactor cool
24、ing function at unit-1,2 and 3.Operation to discharge radioactive water in the basement of the buildings and concrete tunnels outside the buildings of all Unit 1,2,3,startedwith unit 2 on April 19 and counties.Works inside the reactor bldg becomes available after radiation inside were forcibly decre
25、ased through air purification.Instrumental reading of the water gage of the reactor No1 went off the scale on the lower side after adjusting the gage.Emergency power generators were moved to higher ground in order to prevent the reactors cooling systems from failing in case a major tsunami hits the
26、plant again.External power source becomes more reliable after connecting 3 power lines witheach other,which are for Unit 1/2,for Unit 3/4 and for Unit 5/6.The damaged containment vessel of unit 2 is need to be repaired before the work to restore reactor cooling function.TEPCO developed the plan to c
27、ool the reactor through filling the containment vessel with water up to the top of fuel level.The operation of pumping more water into No1 reactor in line with this plan continues.Function of containing radioactive materialIt is presumed that radioactive material inside the reactor vessel may leaked
28、 outside.NISA estimated that the reactor pressure vessel of Unit 2 and 3 may have lost air tightness.Nitrogen gas injection into the Unit 1containment vessel to prevent hydrogen explosion started on April 6th and continues.Cooling the spent fuel pool(SFP)Injecting and/or spraying water to the SFP co
29、ntinues for the purpose of cooling and makeing up water evaporated.Corrosion inhibitor,Hydrazine(H2NNH2),has been injected into the SFP(5/9-).The walls of the reactor building supporting the pool were severely damaged by an explosion on March 15th at unit-4.Work for structural reinforcement to suppo
30、rt the SFP is necessary.Prevention of the proliferation of radioactively contaminated substance:TEPCO announced the plans to prevent radioactively contaminated water,dust and soil and radioactive material itself existing on site from spreading on Apr 17.Full operation of spraying synthetic resin to
31、contain contaminated dust started on Apr.26th and continues.Workers exposure dose:30 workers has been exposed to radiation more than 100 mSv as of 5/11.*Emergency exposure dose limit has been set to 250mSv.,SourceGovernment Nuclear Emergency Response Headquarters:News Release(-5/12 17:00),Press conf
32、erenceNISA:News Release(-5/11 06:00),Press conference,AbbreviationsMEXT:Ministry of Education,Culture,Sports,Science and TechnologyINES:International Nuclear Event ScaleNISA:Nuclear and Industrial Safety AgencyTEPCO:Tokyo Electric Power Company,Inc.NSC:Nuclear Safety Commission of Japan,*1 TEPCOs es
33、timation revised on April 27*2 Correction:Rating was raised from 5 to 7 for the accident of Unit 1 through 3*3 It is presumed that some of the spent fuel may have been damaged based on radioactivesubstance detected from the water sample taken from the pool of Unit 4.,Significance judged by JAIFLowHi
34、ghSevere(Need immediate action),Remarks,Remarks,Remarks,Power Station,Fukushima Dai-ni Nuclear Power Station,Unit,1,2,3,4,Electric/Thermal Power output(MW),1100/3293,Type of Reactor,BWR-5,BWR-5,BWR-5,BWR-5,Operation Status at the earthquake occurredStatus,In Service-Automatic ShutdownAll the units a
35、re in cold shutdown.,INES(estimated by NISA),Level 3,Level 3,Level 3,Unit-1,2,3&4,which were in full operation when the earthquake occurred,all shutdown automatically.External power supply was available after the quake.While injecting water into the reactor pressure vessel using make-up water system
36、,TEPCO recovered the core cooling function and made theunit into cold shutdown state one by one.No parameter has shown abnormality after the earthquake occurred off an shore of Miyagi prefecture at 23:32,Apr.7th.Latest Monitor Indication:1.6Sv/h at 21:00,May 12th at NPS borderEvacuation Area:3km fro
37、m NPS(3/12 7:45),10km from NPS(3/12 17:39),8km from NPS(4/21),Power Station,Onagawa Nuclear Power Station,UnitOperation Status at the earthquake occurredStatus,1,2In Service-Automatic ShutdownAll the units are in cold shutdown.,3,3 out of 4 external power lines in service with another line under con
38、struction broke down after an earthquake occurred off the shore ofMiyagi prefecture at 23:32,Apr.7th.All 5 external power lines have become available by Apr.10th.Monitoring posts readings haveshown no abnormality.All SFP cooling systems had been restored after shutting down due to the earthquake.,Po
39、wer StationOperation Status at the earthquake occurredStatus,Tokai Dai-niIn Service-Automatic ShutdownIn cold shutdown.No abnormality has been found after an earthquake occurred off the shore of Miyagi prefecture at 23:32,Apr.7th.,13th 11:00 Start venting,12th 14:30 Start venting,accumulated in Turb
40、ine bldg of unit-6 to the,Accidents of Fukushima Daiichi Nuclear Power Stationsas of 17:00,May 13rd1.Latest Major event and responseMay 10th13:09-14:45 Operation of injecting water to the Unit 3 SFP was conductedBrief home visit of evacuees has been started:54 households,92 people,have done on May 1
41、0th.More visits are planned for 50 households on May 12th and are being scheduled for 120 households.Visits of the rest are planned in the end of May.May 11th12:30 Water flow into a pit for the Unit 3 water intake power cables was found.Sampling of the water was conducted.18:45 Stop of the water flo
42、w was confirmed after blocking the flow pass by injecting concrete.May 12th05:00 Instrumental reading of the water gage of the reactor No1 went off the scale on the lower side after adjusting the gage.2.Chronology of Nuclear Power Stations(1)Fukushima Dai-ichi NPS,Unit 1Major Incidents and Actions 1
43、1th 15:42 Report IAW Article 10*(Loss of power),Unit 211th 15:42 Report IAW Article 10*(Loss of power),Unit 311th 15:42 Report IAW Article 10*(Loss of power),Unit 414th 04:08 Water temperature in Spent Fuel StoragePool increased at 84,Unit-5 and 619th 05:00 Cooling SFP with RHR-pump startedat Unit 5
44、,*The Act on SpecialMeasures ConcerningNuclear EmergencyPreparedness,11th 16:36 Event falling under Article 15*occurred 11th 16:36 Event falling under Article 15*occurred(Incapability of water injection(Incapability of water injection by core cooling function)by core cooling function)12th 00:49 Even
45、t falling under Article 15*occurred(Abnormal rise of CV pressure)14th 13:25 Event falling under Article 15*occurred(Loss of reactor coolingfunctions)12th 15:36 Hydrogen explosion 14th 16:34 Seawater injection to RPV,12th 20:41 Start venting13th 05:10 Event falling under Article 15*occurred(Loss ofre
46、actor cooling functions)13th 08:41 Start venting13th 13:12 Seawater injection to RPV,15 09:38 Fire occurred on 3rd floor(extinguishedspontaneously)16th 05:45 Fire occurred(extinguishedspontaneously)Since 20th,operation of spraying water to the spentfuel pool continues.29th 11:50 lights in the main c
47、ontrol room becomes,19th 22:14 Cooling SFP with RHR-pump startedat Unit 620th 14:30 Cold shutdown achieved at Unit 5.20th 19:27 Cold shutdown achieved at Unit 6.22nd 19:41 All power source was switched toexternal AC power at Unit 5 and 6.,12th 20:20 Seawater injection to RPV22nd 11:20 RPV temperatur
48、e increased22nd 02:33 Seawater injection through feed water linestarted in addition to fire extinguish line,14th 22:50 Report IAW Article 15*(Abnormal rise of CV pressure)15th 00:02 Start venting15th 06:10 Sound of explosion,Suppression Pool damage suspected,14th 05:20 Start venting14th 07:44 Event
49、falling under Article 15*occurred(Abnormal rise of CV pressure)14th 11:01 Hydrogen explosion,availableApr.13 13:50 Installation of silt fences in front of theUnit 3 and 4 seawater screen completedMay 5 12:19 Operation of spraying water to the spentfuel pool with concrete pump truck conducted.,Apr.1s
50、t 13:40 Start transferring pooled water inthe Unit 6 radioactive waste process facility tothe Unit 5 condenser.May1 14:00 The operation of transferring wateraccumulated in Turbine bldg of unit-6 to themakeshift tank started.,24th 11:30 lights in the main control room becomesavailable,15th 08:25 Whit
