current status of fukushima daiichi nps · 2018-03-05 · current status of fukushima daiichi nps...
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Current status of Fukushima Daiichi NPS
Efforts for Decommissioning and Contaminated Water Management
Agency for Natural Resources and Energy, METIMarch, 2018
Mid- and Long- term Roadmap –Framework (provisional translation)-Mid-and-Long-Term RoadmapThe government has formulated “Mid-and-Long-Term Roadmap towards the Decommissioning of TEPCO’s Fukushima Daiichi Nuclear Power Station” and is engaged in process control measures for decommissioning.
It has been revised three times so far. Continuous review will be carried out based on the situation of the site in the future and the results of research and development.
Major Milestones of the Mid- and Long-Term RoadmapContaminated water management
Suppress contaminated water generation to about 150 m 3 / day. Within 2020Storage of all water generated by treatmentof highly contaminated water in welded-joint
tanksFY 2018
Stagnant water treatment
①Separation of connection between Units 1 and 2 and between Units 3 and 4
Within 2018
②Reduction of radioactive materials in stagnant water in the buildings by one-tenth of the 2014 year-end.
FY 2018
③Completion of treatment of stagnant water in buildings Within 2020
Removal of spent fuels
①Start of spent fuel removal at Unit 1 FY 2023 (an outlook) ②Start of spent fuel removal at Unit 2 FY 2023 (an outlook) ③Start of spent fuel removal at Unit 3 Mid FY2018
Retrieval of fuel debris
①Decision on the method for fuel debris retrieval from the 1st implementing Unit
FY 2019
②Start of fuel debris retrieval from the 1st implementing Unit Within 2021
Solid Radioactive waste
Establishment of a technical perspective on measures of treatment / disposal and on safety.
Around FY2021
Key event
Investigation using Robots
Unit1 Unit3Unit2
Key numbers
95%
Key numbers
0.01
0.1
1
10
100
1000
10000
100000
1000000
I-131Cs-134Cs-137
(Bq/L)
WHO’s guideline level for drinking water quality
Under 0.7Bq/LGeneration of contaminated water500 m3/day
200 m3/day
Mar. 2011 Now
Unit 4
Unit 3
Mar. 2011 Now
Robot into Unit 2 (30 Jan. 2017)
7
調査用パイプ(先端にカメラ)
ロボット経路
Guide pipeRobot’s route Scaffold fallen
Camera into Unit 2 (19 Jan. 2018)
Direction: the access opening for workers
Pebbly deposits(Estimated as fuel debris)
CRD housing support
A dosimeter&
A camera in water
Robot into Unit 1(18-22 Mar. 2017)
Robot into Unit 3 (19-22 Jul. 2017)Inside the pedestal
難透水層
汲み上げ
揚水井下部透水層
難透水層 地下水ドレン
海水面
⑧海側遮水壁⑤陸側遮水壁 ⑤陸側遮水壁
ウェルポイント
Waterproof pavement
Pump up
Well point
Upper Permeable layer
Low-Permeable layer
Sub-drainSub-drain
Groundwater bypass
Groundwater level
Land-side impermeable frozen walls
Land-side impermeable frozen walls
Sea-side impermeable
walls
Sea level
Pump upPump up
Pump up
Turbine bldg.
Reactor bldg.Ground
solidification by sodium
silicate
Groundwater drain
(Source: TEPCO’s website)
Contaminated Water Management
Tank Treated and used for cooling
Treated and stored in tanks
24
Flow ofgroundwater
3 1
Bird’s-eye view
13
N
Contaminated Water Management
Impermeable Wall
Pump up
Pump up
Pump up
原子炉建屋
P.+35m
タービン建屋
Reactor Bldg.
Frozen-soil WallsSeaMountains Cross-section
Impermeable Wall
Frozen-soil Walls
Layersof earth
Pump up
Groundwater bypass Sub-drain Sub-drain
Groundwater-drain
▲
: 地下水ドレン
地下水の流れ
15
Maintenance operation range
The temperature of the temperature measuring tube at a position 85 cm away from the frozen line
Freezing condition of the entire frozen wall (as of 9 February 2017)
Frozen soil wall (Sea-side)
Frozen soil wall (Sea-side)
Groundwater flow
Sea-side impermeable wall
Temperature(degree)
0
10
20
30
40
50
0
200
400
600
800
1000Rainfall at FD
Generation of Contaminated water
Approx. 500
Approx. 200
Gen
erat
ion
of C
onta
min
ated
wat
erStatus of generation of contaminated water
16
Rainfall at FD
m3/day
Operation of the groundwater bypassstarted.
Operation of the sub-drains started.Closure of the seaside impermeable wall
Operation of the groundwater drains started.
Closure of the frozen wall on the land side started.
Closure of the frozen wall on the seaside.
Generation of contaminated water
Before
Waterproof Pavement
After
Status of seawater monitoring around outside of the port
18
0.01
0.1
1
10
100
1000
10000
100000
1000000Seawater around the south Discharge Channel
I-131Cs-134Cs-137
(Bq/L)
WHO’s guideline level for Drinking water quality Cs134,Cs137:10Bq/L
0.01
0.1
1
10
100
1000
10000
100000
1000000Seawater at north side of Discharge Channel of Unit 5,6
I-131Cs-134Cs-137
(Bq/L)
WHO’s guideline level for Drinking water quality Cs134,Cs137:10Bq/L
Status of seawater
< Changes in rest areas >
<Large rest house>
From May 2015
Just after the accident
Working Conditions
Mid-and-Long-Term Roadmap
June, 2015 Revision of third edition
June, 2011 Adapted
September, 2017 Revision of fourth edition
• Many countermeasures have progressed.ex) Robot investigation inside the PCVs
• The policy for fuel debris retrieval has been decided based on NDF’s technical strategic plan.
(1)Fuel debris retrieval• Step by step approach
(2) Spent fuel removal from pools• Proceed carefully with work
(3) Contaminated water management • Reduction of generation volume of contaminated
water
(4) Solid Waste management• Storage of solid waste with volume reduction under
the safety conditions
(5) Communication• Reinforce interactive communication
Mid-and-Long-Term RoadmapKey points
(Provisional translation)
Points of Revision fourth edition
The current framework is maintained.
Mid-and-Long-Term Roadmap
Releasing information from Gov.
MonthlyPress Briefing
To local media
Monthly Information
To Fukushima Pre. And 13 local municipalities
ReleaseInformation To Industries
MonthlyPress Briefing
To media
Release Information through;• Japanese Embassies
and ministerial-level conversations,
• Embassies in Tokyo,• Press Conference,• Briefing, Tour, etc.
Provision of updates to IAEA
Portal site of the status of Decommissioning and Contaminated water Management management in METI-WEB
Films in Japanese
Brochures in Japanese
A Film in English
Brochures in English
Local National Overseas
Fukushima Advisory Board on Decommissioning and Contaminated Water Management
Members Main TopicsChair:State Minister of METIMembers :• Deputy Governor of
Fukushima Prefecture,Mayors of 13 local municipalities around site
• Chamber of commerce, Agricultural cooperative, Fishery association, NPO
• TEPCO,• METI, Nuclear Regulation
Authority, etc.
The 12th Meeting in Mar. 2017:Discussion around members related to best efforts such as contents of information transmission (decommissioning and contaminated water management) Films, Brochures International Forum
The 1st Meeting in Feb. 2014:Explanation of current status (Main issues: Contaminated water Management) from TEPCO & Gov.
Fukushima Today-For a Bright Future-(English)
Fukushima Today 2017 Spring(Japanese)
Fukushima Today(English)
Friends of Japan – Fukushima –(English)
Release: Sep. 2016Runtime: 5 min.Subtitle: English, Chinese, Korean
Release: Mar. 2017Runtime: 17 min.*for the domestic audience
Release: Jan. 2017Runtime: 90 sec.*Aired on JAL, ANA international flights, in hotels, airports etc.
Release: Jun. 2017Runtime: 13 min.*Mainly off-site
“Important Stories on Decommissioning” Brochure
Film and Brochure
Film (Digest)
Cooperation with International Communities
27
International Organizations
BSAF Project(Benchmark Study of the Accident at theFukushima Daiichi NPS)
PreADES(Preparatory Study for Analysis of Fuel Debris)
EGFWMD Meeting(The Expert Group on Fukushima WasteManagement and Decommissioning R&D)
Bilateral Frameworks
U.S.-Japan Bilateral Commission on Civil Nuclear Cooperation- Decommissioning and Environmental Management Working Group- Civil Nuclear Energy R&D Working Group
UK-Japan Nuclear Dialogue- Decommissioning Working Group
Japan-France Nuclear Committee
Peer Review Missions (April, 2013 - ) Expert Visits Expert Meetings Comprehensive information on the website
(December, 2013 - ) “The Fukushima Daiichi Accident” (September,
2015) (Reported by the Director General) Side Event in the General Conference (2015 - )
Japan-Russia Nuclear EnergyWorking Group
Cooperation with International Communities
The Import restrictions on fishery products from JapanAs of May 2011 As of January 2018
10,11 April 2016 in Iwaki-cityMain speakers:
The 1st Forum
W. D. Magwood IVDirector General, OECD/NEA
J. C. LentijoDeputy Director General, IAEA
M. WeightmanFormer Chief Executive, ONR
2,3 July 2017 in Hirono-town and Iwaki-cityFacilitator / Main Speakers
The 2nd Forum
W. D. Magwood IVDirector General, OECD/NEA
J. C. LentijoDeputy Director General, IAEA
H. KainumaAssociate Professor, RITS Univ.
29
International Forum on the Decommissioning of the Fukushima Daiichi Nuclear Power Station
5,6 August 2018 in Naraha-town and Iwaki-city
The 3rd Forum
Dialogue between local representatives and METI, NDF, TEPCO, IAEA, OECD/NEA, etc.
At the 2nd Forum…
Simultaneous graphic recording of the discussion