Fukushima PrefectureContents◆Overview of the Fukushima Daiichi Nuclear Power Station(F1NPS)Accident◆F1NPS Current Situation

・・・P1
・・・P2

◆Fukushima Prefecture Safety Confirmation
Framework

・・・P5◆Initial Response in the Prefecture
Initial Response in Municipalities

・・・P7◆Initial Response by Authorities(Fire, Police, Self-Defense
Forces)・・・P8

Overview of the Fukushima Daiichi Nuclear Power Station(F1NPS) Accident
The Great East Japan Earthquake occurred on 11 March, 2011. A massive earthquake triggered tsunami
which damaged the coastal areas of the Tohoku District, including Fukushima Prefecture.

F1NPS Accident

Tsunami Damage

Damage at the Power Station

Tsunami caused flooding of the emergency
power supplies including batteries, whichlead to a loss of power for reactors 1-5
Fuel melted in reactors 1-3 and radioactive
substances were released into the air
Hydrogen explosions caused damage to thebuildings containing reactors 1, 3, and 4.
Cooling function was lost for the spent fuelpools of reactors 1-6.

Earthquake Damage
The Earthquake triggered theemergency stop of theoperating reactors(1 – 3)
Emergency power supplies were
triggered, starting fuel cooling
operations for reactors 1-6Damage ResponsePower Station struckby tsunami

Fuel in Reactors 1-3 were cooled using water injection, and reached a stable condition
Reactor 5 resumed cooling operations using the emergency power facilities of Reactor 6.
Cooling of the spent fuel pools was resumed using pumping vehicles and other temporary equipment.

F1NPS - Situation after Tsunami Disaster
Reactor
No.

Operational
Condition

Reactor fuel（Unit：rod）

Fuel in Pool
（Unit: rod）

AC Power
SourceDC Power
SourceEmergency ACPower Source

１

Operating

400

392

Unusable

Unusable

Unusable２

Operating

548

615

Unusable

Unusable

Unusable３

Operating

548

566

Unusable

Partially
usableUnusable

４

Suspended

0

1,535

Unusable

Unusable

Unusable

５

Suspended

548

994

Unusable

UsableUnusable

６

Suspended

764

940

Unusable

UsableUsableReactors 1-6 after the accident
Reactor1

Reactor3

Reactor2
３/１２
Hydrogen
explosion

Explosions did
not occur for
Reactors 5 and 6

３/１５
Hydrogen
explosion

Reactor4

３/１４
Hydrogen
explosion

Radioactive
substances werereleased fromthe side panel ofthe building

Reactor6

Reactor5
1

F1NPS Current Situation

Decommissioning operations are currently underway for reactors 1 – 6 at the F1NPS.

Current situation of reactors
Reactor temperature

Amount of radioactive substances

Roughly 300㎥ of cooling water isbeing injected into the reactors everyday
Reactor temperature is stable atbelow 50°C (As of October, 2015)

Concentrations of radioactive substances are being
monitored and no signs of recriticality have been
observed(As of October, 2015)



Amount of radio cesium per hour dispersed
from the nuclear reactor buildings (100 mil. Bq)

Temperatures inside containment
vessel air conditioners

Significantly
Decreasing

Reactors are kept
stable throughcooling using
water injection

Reactor1
Reactor2
Reactor3
Reactor4

Current Situation（2015.10）of Reactors 1-6
Reactor1

Reactor2

Reactor 1 was furnished with acover in order to reduce theamount of radioactive
substances being released in
October, 2011. Currently thecover is being dismantled in
preparation for the removal of
rubble(October, 2015)

Reactor3

Reactor 2 panels werecovered to prevent therelease of radioactive
substances.

Reactor5

Reactor4

Rubble removal wascompleted for the top of
the No.3 reactor building.

Reactor6

Removal of all fuel wascompleted for reactor 4
in December, 2014
As no explosions occurred,
reactor buildings 5 and 6
remain as they were
before the accident.

2F1NPS Current Situation
TEPCO is conducting marine monitoring in order to confirm the impact on the environment caused by theradioactive substances released from the F1NPS. There are also many measures in place for the processing andreduction of contaminated water.
TEPCO is making efforts to confirm the environmental impact of radioactive substances
released from the F1NPSMarine monitoringRadiation levels inside and outside the power station are being measured.
In spite of the leak of contaminated water, no significant increase in radiation levels
has been observed outside the port.
Radiation levels of sea water are well below standards for drinking water set by WHO.
As of 2015.9.24

T-0-1

T-0-1A

T-0-2

T-0-3

T-0-3A

Cs-134

ND

ND

ND

ND

ND

Cs-137

ND

ND

ND

ND

ND

Total β

ND

ND

ND

ND

ND

H-3

ND

ND

ND

ND

0.001

T-0-1 T-0-1A
Fukushima Daiichi
Nuclear Power
Station

T-0-2

T-0-3 T-0-3A*Total beta activity includes naturally occurring radionuclides such as K-40.

Contaminated Water
Countermeasures【ALPS】
Removing radioactive
substances( except
tritium ) fromcontaminated water.

Groundwater seeps into the nuclear reactor buildings, causing an increase of 350㎥/dayof contaminated water. The following measures are being taken at the F1NPS for theprocessing and control of the contaminated water.

【Contaminated Water Tanks】【Sub-drain】
Pumping of groundwater from the wells around thebuildings allows control of the amount of water
seeping into the buildings. Water pumped will go
through the purification process, and be discharged
to the sea only if the radiation levels are confirmed
to meet discharge standards.

Reactorbuilding

pump【Underground water bypass】
By pumping up groundwater before it iscontaminated using wells located on the mountainside of the site and discharging it into the sea, theamount of groundwater seeping into the buildings
can be controlled

Turbinebuilding

Steel wallpump

【Cryogenic ice wall（under construction)】
By embedding freezing pipes around the building,groundwater and soil can be frozen to make ice walls. Thissystem prevents water from approaching the reactor
building and suppresses the flow of groundwater.
3

F1NPS Current Situation
All fuel needs to be removed from reactors in order to complete the decommissioning of the F1NPS. The current
plan is to remove fuel from the spent fuel pools before removing the melted fuel debris from the reactors.

Decommissioning Measures（１）Removal of spent fuelThe situation of each reactor regarding the removal of spent fuels is as follows:
Reactor No.

Situation

1

Cover of the reactor building is being
dismantled.

2

Reviewing of the optimal method to remove
fuel is underway.

3

Removal of rubble in the spent fuel pools isunderway.

4

Removal of all fuel was completed in
December, 2014

Reactor 1
Dismantling the building cover.

Reactor 3
Removing large rubble

Reactor 4
Removing fuel≪Timeline of fuel removal from spent fuel pools≫
Reactor1

Dismantling the building covers

Reactor2

Decontamination work andpreparatory construction

Reactor3

Rubble removal

Rubble removal

Setup of removal equipment

Dismantling of the upper part of thenuclear building and reconstruction

Setup of removal equipment

Fuel removal

Setup of removal equipment

Fuel removal

Plan1

Setup of removal equipment

Fuel removal

Plan2

Fuel removal

Plan 1) Setup of containers used for removal of fueland debris as well.
2) Setup of specialized cover for the removal of fuelRemoval of rubble and decontamination work are taking place at reactors 1 - 3.

（２）Removal of fuel debris◆Submersion methods which can control
the impact of radiation are currently being
examined.
◆Methods to remove fuel in the air in theevent that submersion is not available arealso being examined.
◆In order to grasp the condition of fueldebris, the inside of the reactors areundergoing investigation.

≪How to remove fuel debris≫
Complete submergence

submergence

In the air

All in the air

submergence of the top of thecontainment vessel in the reactor

Above the core fuel area
(fuel debris being submerged)

Below the core fuel area
(fuel debris partly in the air)No water(all fuel debris in the air)Investigation inside
Reactor1 of the F1NPS

Investigation inside
Reactor2 of the F1NPS

Measuring the location of fueldebris in reactor 1 using cosmic ray
muon scanning.

Investigation robot for the insideof the reactor 1 containment
vesselPicture inside of the reactor 1
containment vessel. Taken by theinvestigation root.

4

Investigation robot in side thereactor 2 containment vessel.

Fukushima Prefecture Safety Confirmation Framework
Fukushima Prefecture has established a framework to confirm the safety of F1NPS decommissioning measurestaken by the national government and TEPCO, and is strictly watching over the entire process to ensure safe andsteady progress.
Fukushima Safety Confirmation Framework○Prefectural officials○Municipal officials from 13 municipalities○Experts(18 persons)…Experts of nuclear power engineering
Administration

Prefecture

13 municipalities※
Power stationlocated 4 towns③Onsite representative

Adjacent 9
municipalities④Senior Advisor, Advisor②Citizens’ Council for securing ofsafety in decommissioning

Collaboration/information sharing①Association for monitoring of safety
in decommissioning○Citizen…1 person from 13 municipalities○Various organizations …1 person from 15
organizations○Academic experts (3 persons)
Citizens

Opinions fromthe viewpointof citizens

Reflecting
opinions in
the proposal

Opinions fromvarious fields
and groups⑤Monitoring
Agreement to securesafetyAgreement for reportingand communication

Onsite inspection of
the power station

TEPCO(Decommissioning work at
the Fukushima Daiichi NPS)

Proposals to the national
government and TEPCO

Ministry of Economy, Trade andIndustry（progress management of
decommissioning process）
Nuclear Regulation Authority（safety regulation）

Publications on policies of theprefecture and decommissioning efforts tocitizens

Prefecture’s
WebsitePublicity
bookletsE-bulletinboard※13 municipalities…4 nuclear-located towns：Naraha Town, Tomioka
Town, Okuma Town and Futaba Town
…9 adjacent municipalities：Iwaki City, Tamura
City, Minami Soma City, Kawamata Town, Hirono Town,
Kawauchi Village, Namie Town, Katsurao Village,
Iitate Village①Association for monitoring of safety in decommissioning○Activities
This association consists of prefecturaland municipal officials, and experts ofnuclear power engineering.
Decommissioning progress made by
the national government and TEPCO isconfirmed through onsite inspectionsof the F1NPS and meetings.
Based on the results, the prefecture
makes proposals to the national
government and TEPCO.
Confirmation
through meetings

Confirmation by
onsite inspection

Onsite inspection（2015.6.27）

Proposals by thegovernor

The Association formonitoring of safety indecommissioning
established two working
groups for the discussion of
specific matters.
Confirmation byworking groups
Working group forworkers’ safety
and healthWorking group forthe evaluation ofenvironmental
monitoring

Meetings （2015.7.15）

Proposal （2015.8.28）

5Discussions on matters related
to management of radiation
exposure, safety and health andemployment fordecommissioning workers
Discussions on matters related
to planning for monitoringaround the power station andthe evaluation of monitoring
results

Fukushima Prefecture Safety Confirmation Framework②Citizens’ Council for securing of safety in decommissioning○Activities
Council consisting of representatives ofresidents from 13 relevant municipalities andfishery associations as well as academic experts
confirms the decommissioning progress.
A wide range of public opinions are reflectedin the proposals to the national government
and TEPCO made by the Association formonitoring of safety in decommissioning.

Observation tour of the F1NPS.
（2015.5.30）

Meeting（2015.9.1）③Onsite stationed officials○Activities
To strengthen the surveillance system on
TEPCO’s decommissioning measures, theprefecture allocated onsite stationed officials in
Naraha Town, Futaba County, Fukushima
Prefecture on April 1, 2014.
Onsite officials work to confirm the situation of
the F1NPS through onsite inspection, and head forthe site to collect information in the event trouble
occurs at the power station.

Members join
observation
tours of the
F1NPS.

Location of the Fukushima Prefectural Government,
Onsite office, and the F1NPS
Prefectural
Government
OfficeF1NPSThe Onsite office islocated 16km awayfrom the F1NPS andavailable for quick
response.

Approx.16㎞

OnsiteofficeF1NPS Pictures

NarahaTown④Senior Nuclear Power Response Adviser・Nuclear Power Adviser○Actions: With the aim to confirm decommissioning progress from an expert standing, the prefecture allocated the Nuclear
Power Adviser on April 1, 2013 and Senior Nuclear Power Response Adviser on October 1, 2013. Two more Nuclear Power
Advisers were added on April 1, 2014 and the surveillance system has been enhanced.
・ Senior Nuclear Power
Response Adviser(1 person)◆Making policy recommendations to the prefecture concerning the safety surveillance of
the F1NPS◆Providing opinions from an expert’s viewpoint when attending the Citizens’ Council for
securing of safety in decommissioning.

・ Chief Nuclear Power
Adviser (1 person)
・ Nuclear Power Adviser(2 persons)◆Providing opinions from an expert’s viewpoint by participating in the Association formonitoring of safety in decommissioning (meetings and onsite inspections) and the
Citizens’ Council for securing of safety in decommissioning.
◆Attending national meetings concerning decommissioning and contaminated water as anobserver.

⑤Monitoring

Release of
information to
citizens

Additional installationof dust monitors

Removal of rubble from reactor 1 will
require the dismantling of the building cover.
In preparation for this the prefecture
installed an additional 16 monitors,
strengthening the system to monitor thedispersal of radioactive substances in real
time.

Observation tour of the F1NPS （2015.9.29）

6

Fukushima publishes monitoring results on
the prefectural website as needed. If by any
chance, any monitoring result should show
abnormal values, we will conduct additional
monitoring and upload the results on thewebsite as well as provide municipalities andmedia with information.

Initial Response in Fukushima Prefecture
Initial Response in Municipalities

March 11, 2011

March 12

Fukushima
Disaster Response
Headquarters

・（14：46）Established ‘Disaster Response Headquarters’
Nuclear Group was set up in the Response Headquarters.
・Started to measure the air radiation levels in 7 districts in the prefecture.
・（20：50）Evacuation order was issued to residents within a 2km radius of
the F1NPS.

・Conducted emergency monitoring.
・Started radiation exposure screening.

Fire department

・（15:12）Decided to dispatch Emergency Fire Response Team・Started relief operation

・Arrival of fire helicopter of eachprefecture
・Operation started

・Setup of the Disaster Response Headquarters
・Guiding of evacuation started.
・Started relief operation

・Guiding of residents’ evacuation
started.

・（18:00）Ordered to dispatch for large-scale earthquake disaster・Started relief operation
・（19:30） Ordered to dispatch for the nuclear disaster・Started the transportation of
supplies and evacuees.

PoliceSelf-Defense
ForcesResponse by the Fukushima Disaster Response Headquarters
Enhancement of the disaster response
headquarters system
In the wake of the disaster, the Fukushima Disaster Response Headquarters consisted of 10 response groups that
acted as secretariats. However, the scale of damage caused by the Great East Japan Earthquake was far greaterthan expected, and project teams were established under the response groups in order to take proper measures.

Response groups and their actions in the wake of the disaster
Name of groups

Fukushima Disaster
Response Headquarters

Main actions○General Management Group Cross-sectional adjustment among groups of secretariat, departments and bureaus, the national government andmunicipalities Communication and adjustment with the recovery and reconstruction headquarters
Life reconstruciton support team Interpretation of Disaster Relief Act, Act concerning support for reconstructing livelihoods of disaster victims and Act on disaster condolence
前に、市町村長独自の判断により避難勧告・避難指示が出されました。
money, and operation of reconstruction fund
Organization of disaster flash reports of damage situation, provision of disaster flash reports to relevant organizations inside and outside○Information collection group the prefecture, and roundup of accepting number of evacuees○Action support group Assurance and occupational management of disaster response staff, assurance of food and accommodation, operation of prefectural vehicles
Drawing up of written request and adjustment of accepting observation groups.
○Liaison group
Provision of medical assistance for evacuation centers, measures for persons in need of help in the disaster, screening and payment of○Rescue groupburial cost
Stock management of food, daily commodities, and distribution of supply from the Japanese Red Cross and NGO○Supply group
Response to interviews by media○Public Relations group
Residents’ evacuation and○ safety group

Support for operation of primary evacuation centers, publication of wall papers○Nuclear group

Grasping of damage to the power station and provision of information to disaster related organs○Communication group

Management of disaster radio and collection & reporting of weather information

Initial response by municipalities
Evacuation guidance for residents
Securing
transportation means
We needed to secure buses and such forsupply of gasoline and persons who could
hardly secure means of evacuation. It was
extremely hard for us to secure buses
because there were too many residents
aimed to evacuate due to the designation of
the whole-area evacuation order and manymunicipalities required to evacuate.

Evacuation ordersCommunicating orders

In the wake of the Great
East Japan Earthquake evacuation orders covered wide areas,
and the prefectural and local governments took various
measures to communicate with residents.
◆Communications through disaster-prevention administrative
radios, outdoor speakers, IP Voice announcements.
◆Communications through human power, such as PR cars anddoor-to-door visits by jurisdictional fire departments, police
officers and volunteer firefighters◆Guidance by municipal government officials, police officers,
firefighters and volunteer firefighters.

Support for persons inneed of assistance in thedisaster , such as elderly
persons
Support was provided forresidents who were unable
to evacuate by themselves orwith the help of family. Fire
department officials, social
workers and officials of
welfare departments ofmunicipal governments
confirmed their safety andguided evacuation.

Opening and operation of evacuation centers
Request to accept
evacuees
As many municipalities were designated toevacuate completely, municipalities in and out ofthe prefecture mainly dealt with the requests.
There are many cases where municipal heads
requested other municipalities to accept evacuees.

Support by municipalities
accepting evacuees
Although the accepting municipalities were greatly affected by
the earthquake, they provided significant help to evacuees of thenuclear power accident. Instead of severely damaged
municipalities which were evacuated, municipalities that
accepted evacuees managed the evacuation centers.

7

Evacuation Center(Azuma Sports Park in Fukushima City）

Initial response by the fire authorities, police and self-defense forces

March,13 to 16
Fukushima
Disaster Response
Headquarters

March,17 to 25

・（March 14） Started to provide English and Chinese
disaster information through website.
・（March 16） Requested emergency monitoring ofagricultural produce and drinking water.

March,26to31

・（March 17） Opened a service for inquiries
concerning radiation.

Fire department

・（March 17）Flushing of water using watercannon trucks started for reactor 3of the Fukushima Daiichi NPS
・（March 18） Search operation started.

Police・（March 14）Evacuation started for hospital patients andinstitutionalized persons.
・（March 15）Publicity and patrol to request the indoor
evacuation.

Self Defense
Forces・（March 13） Supplied water to the Fukushima Daini NPS

・Search operation continued.

・（March 29）Patrol teamstarted operation.

・（March 17） water sprinkling and flushing forreactor 3 of the Daiichi NPS
・（March 18） Search operation started.

・Search operation continued.

Ⅰ． Quick response by the fire department
What is the emergency
fire response team?

It is a relief team that operates fire extinguishment and relief operations in the event oflarge-scale disaster and special disasters upon request of affected areas.
In the wake of the disaster, the commissioner of the fire and disaster management agency ordered to respond to the request for the
emergency fire response team at 15:12, March 11, 2011. Accordingly, the Fukushima Headquarters for coordination of fire rescue teams
was set up in the Fukushima Autonomous Hall

Operation of the Fukushima
Headquarters for coordinationof fire rescue teams

Relief request◆Relief from other prefectures
We accepted ground teams (1 metropolitan area, 9 prefectures and 3 cities) and air
teams (9 prefectures and 6 cities), and requested relief operations by 4,230 rescue
teams and 15,241 rescue officers in 88 days from March 11 to June 6.
◆Relief within the prefecture
We requested relief operation by 126 rescue teams and 397 rescue officers in 88
days from March 11 to June 6.They conducted search and rescue operations andtransported patients between hospitals.

Fukushima Disaster Response
Headquarters◆Support, communication and coordination of emergency fire rescue teams◆Communication and coordination with the Fire and Disaster Management Agency◆Communication and coordination with fire department in the prefecture◆Communication and coordination with police department and self-defense forces.
◆Coordination of dispatch calls for the air rescue team and the emergency fire
rescue team.
◆Provision and lending of equipment for nuclear disaster response

Ⅱ．Quick response by the prefectural police department
Establishment of the
Fukushima Headquarters
of Disaster Security

On Mar. 11, Fukushima Headquarters of Disaster Security wasestablished and Fukushima Police Station Disaster Security Headquarters was setup at 22 police stationsin the prefecture. On the 12, ‘Consultation section for missing persons and policy security’ throughsatellite phone and free dial was set up at the Disaster Security Headquarters.

Rescue call
Called for dispatch of rescue aid
team for wide area to the
National Police Agency on Mar.
11. 390,000 police officers weredispatched from the National
Police Agency and police
departments in 45 prefectures
for aid and security operations
for disaster relief.

Fukushima Disaster
Response Headquarters

Guiding evacuation and patrol◆March 12, following the evacuation order, police started instructing residents to evacuate to areas outside the 20 km radius zone from the
Fukushima Daiichi NPS, and areas outside the 10km radius zone from the Fukushima Daini NPS.
◆March 14, Started instructing the evacuation of patients of hospitals and nursing care facilities for elderly people in areas within a 20 km
radius from the F1NPS.
◆March 15, Advised residents within 20 to 30km from the F1NPS to stay inside their houses and patrolled for them.
◆March 29, Deployed patrol teams to areas within 10 to 30 km from the Fukushima Daiichi NPS, and reinforced policing in the affected areas.

Evacuation operations

Ⅲ．Quick response of the Self Defense Forces
Establishment of the
Response Headquarters
2:50 p.m. March 11, Ministry of Defense established theDisaster Response Headquarters (head: Defense Minister).

Call for dispatch in responseto the nuclear disaster

Call for dispatch◆Call for dispatch in response to the disaster. Call by the governorof Fukushima Prefecture.
（4:47 p.m., March 11)◆Call for dispatch in response to the nuclear disaster. Call by thehead of the Nuclear Disaster Response Headquarters (Prime Minister).
(7:30p.m.)（March 11, 2011 to December 26, 2011）
Central Readiness Force played a key role in the operation. (Mobile operationgroup under the direct control of the Defense Minister)◆March 13 to 14 They supplied condensate tanks to the NPS with 400 tons ofwater taken from the river using 10 water tank vehicles.
◆March 17 to 21 Dumping of sea water by SDF helicopters from the air andwater flushing using pump vehicles on the ground to cool the nuclear reactors.
◆They conducted the rescue of injured persons, support for hospital patients’evacuation and opened of the decontamination center (area extending 100km
to north and south and 60km to east and west of the NPS.)

Call for dispatch in responseto the large scale disaster

Fukushima Disaster Response
Headquarters（March 11, 2011 to August 31, 2011）◆Information collection by aircraft and search and rescue operations for affected persons.
◆Fire fighting and transportation of personnel and supplies◆Support for school lunches, water supply, bathing and medical services◆Resumption of roads, removal of debris and support for epidemic prevention◆Acceptance of evacuees at SDF facilities

8

Published on December,2015
Nuclear Power Safety Division
Risk Management Department
Fukushima Prefectural Government
2-16 Sugitsuma-cho, Fukushima City,
Fukushima Prefecture z/c 960-8670
Tel （024）521－7255