SlideShare une entreprise Scribd logo
1  sur  5
Télécharger pour lire hors ligne
TABLE 2. UNIT 2 REACTOR: FUKUSHIMA DAIICHI NUCLEAR POWER PLANT: 11 MAY 2011
                                            ASSESSMENT OF STATUS IN TERMS OF FUNDAMENTAL SAFETY FUNCTIONS FOR ACHIEVING A SAFE STATE

                                             Necessary safety function and                                                                                                               TEPCO Roadmap
                                                                                                         Observation                                Evaluation of safe state
                                                       conditions                                                                                                                         countermeasures
                                        Reactor is subcritical and sub-criticality   - No power spike or power increase                       ACHIEVED                               No additional
              Control of
              Reactivity




                                        is demonstrated and maintained               - No significant neutron flux measured and reported      Caution:                               countermeasures reported
                                                                                     - Short lived fission products are not reported at the   - Continue detection of neutrons
                                                                                       moment (e.g. La-140)                                     and short-lived isotopes

                                        Stable cooling shall be assured              -   Reactor vessel temperature is: (115.1 °C at          NOT ACHIEVED                           Nos 1, 3, 4, 7, 8, 9, 13, 14,
                                        - Keep the coolant temperature                   feedwater nozzle, reactor pressure vessel            Establishment of a long term closed-   16 and 17
                Residual heat removal




                                            sufficiently below the boiling point         pressure ≤ 1.0 atm based on available                loop heat removal circuit is advised
                                            at atmospheric pressure                      measurements)
                                        - Cover the damaged core adequately          -   Water level of reactor core is below about
                                            with water                                   −1500 mm (A) and −2100 mm (B) from the top
                                        - Off-site and back-up power supply              of active core
                                            shall be available                       -   Off-site power supply and backup power from
                                        - Achievement of long term closed-               portable diesel generators are available
                                            loop heat removal capability             -   Fresh water injection is provided; however,
                                                                                         closed-loop heat removal is not yet established
                                        -    Containment is leak-tight               -   Containment is believed to be damaged: latest        NOT ACHIEVED                           Nos 2, 6, 11 and 15
                                        -    Containment pressure is maintained          measurements show the containment pressure to         - Measures to make the
              Containment




                                             below design limits                         be around atmospheric                                     containment leak-tight should
               integrity




                                        -    Hydrogen explosion to be                -   Containment probably damaged following                    be pursued
                                             prevented.                                  hydrogen explosion at this unit at 21:14 UTC on       - Pressure and H2 concentration of
                                                                                         14 March 2011                                             the containment to be further
                                                                                                                                                   monitored
                                        -    Reactor pressure vessel (including      -    Reactor pressure vessel is assumed to be            NOT ACHIEVED                           Nos 5, 10, 29–46, 50, 54
 radioactive material




                                             connected systems) should not leak;          leaking, most probably through connected            Construction of a cover above the      and 55
                                             or if so the leakage shall be                recirculation system (pump seal loss of coolant     reactor building has to be pursued
      Confining




                                             confined within allowable limits             accident)
                                        -    Leakages from the containment           -    Containment is believed to be damaged: latest
                                             should be prevented or controlled,           measurements show the containment pressure
                                             or shall be confined                         and reactor pressure vessel pressure to be
                                                                                          around atmospheric




[Type text]
Necessary safety function and                                                                                                      TEPCO Roadmap
                                                                                          Observation                              Evaluation of safe state
                                               conditions                                                                                                              countermeasures
                               -   No additional releases shall be     -   Intermittent releases have been observed         NOT ACHIEVED                         Nos 12, 47–49, 51–53, 55–
                                   anticipated                         -   Radiation monitors are available                 Measures to prevent radioactive      63
Limiting effects of releases




                               -   Radiation monitoring measurements   -   White smoke is observed emanating                releases and leaking of water with   The transfer of stagnant
                                   shall be available                      continuously from the reactor building           high level radioactivity to the      water from the turbine
                                                                       -   Samples of water in the turbine building floor   environment should be further        building to the radioactive
                                                                           area show high radioactivity releases from the   pursued                              waste treatment facilities is
                                                                           reactor and the containment to the environment                                        continuing
                                                                                                                                                                 Work to block the trench
                                                                                                                                                                 pit to prevent release of
                                                                                                                                                                 water with high level
                                                                                                                                                                 radioactivity to the
                                                                                                                                                                 environment is ongoing
Table 2: Unit 2 Reactor: Fukushima Daiichi Nuclear Power Plant - 11 May 2011
Table 2: Unit 2 Reactor: Fukushima Daiichi Nuclear Power Plant - 11 May 2011
[Type text]

Contenu connexe

Similaire à Table 2: Unit 2 Reactor: Fukushima Daiichi Nuclear Power Plant - 11 May 2011

Table 3: Unit 3 Reactor: Fukushima Daiichi Nuclear Power Plant - 11 May 2011
Table 3: Unit 3 Reactor: Fukushima Daiichi Nuclear Power Plant - 11 May 2011Table 3: Unit 3 Reactor: Fukushima Daiichi Nuclear Power Plant - 11 May 2011
Table 3: Unit 3 Reactor: Fukushima Daiichi Nuclear Power Plant - 11 May 2011International Atomic Energy Agency
 
Table 1: Unit 1 Reactor: Fukushima Daiichi Nuclear Power Plant - 18 May 2011
Table 1: Unit 1 Reactor: Fukushima Daiichi Nuclear Power Plant - 18 May 2011Table 1: Unit 1 Reactor: Fukushima Daiichi Nuclear Power Plant - 18 May 2011
Table 1: Unit 1 Reactor: Fukushima Daiichi Nuclear Power Plant - 18 May 2011International Atomic Energy Agency
 
Download-manuals-training-understanding stage-dischargerelations
 Download-manuals-training-understanding stage-dischargerelations Download-manuals-training-understanding stage-dischargerelations
Download-manuals-training-understanding stage-dischargerelationshydrologyproject0
 
Nuclear power plant-safety measures
Nuclear power plant-safety measures Nuclear power plant-safety measures
Nuclear power plant-safety measures Nishtha Shreya
 

Similaire à Table 2: Unit 2 Reactor: Fukushima Daiichi Nuclear Power Plant - 11 May 2011 (6)

Table 3: Unit 3 Reactor: Fukushima Daiichi Nuclear Power Plant - 11 May 2011
Table 3: Unit 3 Reactor: Fukushima Daiichi Nuclear Power Plant - 11 May 2011Table 3: Unit 3 Reactor: Fukushima Daiichi Nuclear Power Plant - 11 May 2011
Table 3: Unit 3 Reactor: Fukushima Daiichi Nuclear Power Plant - 11 May 2011
 
Table 1: Unit 1 Reactor: Fukushima Daiichi Nuclear Power Plant - 18 May 2011
Table 1: Unit 1 Reactor: Fukushima Daiichi Nuclear Power Plant - 18 May 2011Table 1: Unit 1 Reactor: Fukushima Daiichi Nuclear Power Plant - 18 May 2011
Table 1: Unit 1 Reactor: Fukushima Daiichi Nuclear Power Plant - 18 May 2011
 
SPE 59300
SPE 59300SPE 59300
SPE 59300
 
Bam Nuttall Hv Test Report
Bam Nuttall   Hv Test ReportBam Nuttall   Hv Test Report
Bam Nuttall Hv Test Report
 
Download-manuals-training-understanding stage-dischargerelations
 Download-manuals-training-understanding stage-dischargerelations Download-manuals-training-understanding stage-dischargerelations
Download-manuals-training-understanding stage-dischargerelations
 
Nuclear power plant-safety measures
Nuclear power plant-safety measures Nuclear power plant-safety measures
Nuclear power plant-safety measures
 

Plus de International Atomic Energy Agency

Radiological Monitoring and Consequences of Fukushima Nuclear Accident (2 Jun...
Radiological Monitoring and Consequences of Fukushima Nuclear Accident (2 Jun...Radiological Monitoring and Consequences of Fukushima Nuclear Accident (2 Jun...
Radiological Monitoring and Consequences of Fukushima Nuclear Accident (2 Jun...International Atomic Energy Agency
 
Marine Environment Monitoring of Fukushima Nuclear Accident (2 June 2011)
Marine Environment Monitoring of Fukushima Nuclear Accident (2 June 2011)Marine Environment Monitoring of Fukushima Nuclear Accident (2 June 2011)
Marine Environment Monitoring of Fukushima Nuclear Accident (2 June 2011)International Atomic Energy Agency
 
Tc Programme - Delivering Results for Peace and Development (Russian)
Tc Programme - Delivering Results for Peace and Development (Russian)Tc Programme - Delivering Results for Peace and Development (Russian)
Tc Programme - Delivering Results for Peace and Development (Russian)International Atomic Energy Agency
 
Technical Cooperation Programme - Delivering Results for Peace and Developmen...
Technical Cooperation Programme - Delivering Results for Peace and Developmen...Technical Cooperation Programme - Delivering Results for Peace and Developmen...
Technical Cooperation Programme - Delivering Results for Peace and Developmen...International Atomic Energy Agency
 

Plus de International Atomic Energy Agency (20)

IAEA Bulletin September 2011
IAEA Bulletin September 2011IAEA Bulletin September 2011
IAEA Bulletin September 2011
 
The IAEA Legal Framework for Nuclear Safety
The IAEA Legal Framework for Nuclear SafetyThe IAEA Legal Framework for Nuclear Safety
The IAEA Legal Framework for Nuclear Safety
 
Radiological Monitoring and Consequences of Fukushima Nuclear Accident (2 Jun...
Radiological Monitoring and Consequences of Fukushima Nuclear Accident (2 Jun...Radiological Monitoring and Consequences of Fukushima Nuclear Accident (2 Jun...
Radiological Monitoring and Consequences of Fukushima Nuclear Accident (2 Jun...
 
Marine Environment Monitoring of Fukushima Nuclear Accident (2 June 2011)
Marine Environment Monitoring of Fukushima Nuclear Accident (2 June 2011)Marine Environment Monitoring of Fukushima Nuclear Accident (2 June 2011)
Marine Environment Monitoring of Fukushima Nuclear Accident (2 June 2011)
 
Table: Summary of reactor unit status at 4-may-0700 utc
Table:  Summary of reactor unit status at 4-may-0700 utcTable:  Summary of reactor unit status at 4-may-0700 utc
Table: Summary of reactor unit status at 4-may-0700 utc
 
Radiological Monitoring and Consequences - 5 May 2011
Radiological Monitoring and Consequences - 5 May 2011Radiological Monitoring and Consequences - 5 May 2011
Radiological Monitoring and Consequences - 5 May 2011
 
Summary of reactor unit status - 5 May 2011
Summary of reactor unit status - 5 May 2011Summary of reactor unit status - 5 May 2011
Summary of reactor unit status - 5 May 2011
 
Table summary of reactor unit status at 27-april-0700 utc
Table summary of reactor unit status at 27-april-0700 utcTable summary of reactor unit status at 27-april-0700 utc
Table summary of reactor unit status at 27-april-0700 utc
 
Table summary of reactor unit status at 26-april-0700 utc
Table summary of reactor unit status at 26-april-0700 utcTable summary of reactor unit status at 26-april-0700 utc
Table summary of reactor unit status at 26-april-0700 utc
 
Summary of reactor unit status - 19 April 2011
Summary of reactor unit status - 19 April 2011Summary of reactor unit status - 19 April 2011
Summary of reactor unit status - 19 April 2011
 
Fukushima Marine Environment Monitoring - 19 April 2011
Fukushima Marine Environment Monitoring - 19 April 2011Fukushima Marine Environment Monitoring - 19 April 2011
Fukushima Marine Environment Monitoring - 19 April 2011
 
Radiological Monitoring and Consequences - 19 April 2011
Radiological Monitoring and Consequences - 19 April 2011Radiological Monitoring and Consequences - 19 April 2011
Radiological Monitoring and Consequences - 19 April 2011
 
Tc Programme - Delivering Results for Peace and Development (Russian)
Tc Programme - Delivering Results for Peace and Development (Russian)Tc Programme - Delivering Results for Peace and Development (Russian)
Tc Programme - Delivering Results for Peace and Development (Russian)
 
Table summary of reactor unit status at 18-april 2011
Table  summary of reactor unit status at 18-april 2011Table  summary of reactor unit status at 18-april 2011
Table summary of reactor unit status at 18-april 2011
 
Table summary of reactor unit status at 15-april-1200 utc
Table   summary of reactor unit status at 15-april-1200 utcTable   summary of reactor unit status at 15-april-1200 utc
Table summary of reactor unit status at 15-april-1200 utc
 
Tc programme presentation UN audience
Tc programme presentation UN audienceTc programme presentation UN audience
Tc programme presentation UN audience
 
TC Programme Presentation Russian
TC Programme Presentation  RussianTC Programme Presentation  Russian
TC Programme Presentation Russian
 
Technical Cooperation Programme - Delivering Results for Peace and Developmen...
Technical Cooperation Programme - Delivering Results for Peace and Developmen...Technical Cooperation Programme - Delivering Results for Peace and Developmen...
Technical Cooperation Programme - Delivering Results for Peace and Developmen...
 
Fukushima Marine Environment Monitoring - 12 April 2011
Fukushima Marine Environment Monitoring - 12 April 2011Fukushima Marine Environment Monitoring - 12 April 2011
Fukushima Marine Environment Monitoring - 12 April 2011
 
Fukushima Marine Environment Monitoring - 12 April 2011
Fukushima Marine Environment Monitoring - 12 April 2011Fukushima Marine Environment Monitoring - 12 April 2011
Fukushima Marine Environment Monitoring - 12 April 2011
 

Dernier

OpenShift Commons Paris - Choose Your Own Observability Adventure
OpenShift Commons Paris - Choose Your Own Observability AdventureOpenShift Commons Paris - Choose Your Own Observability Adventure
OpenShift Commons Paris - Choose Your Own Observability AdventureEric D. Schabell
 
Introduction to Matsuo Laboratory (ENG).pptx
Introduction to Matsuo Laboratory (ENG).pptxIntroduction to Matsuo Laboratory (ENG).pptx
Introduction to Matsuo Laboratory (ENG).pptxMatsuo Lab
 
Comparing Sidecar-less Service Mesh from Cilium and Istio
Comparing Sidecar-less Service Mesh from Cilium and IstioComparing Sidecar-less Service Mesh from Cilium and Istio
Comparing Sidecar-less Service Mesh from Cilium and IstioChristian Posta
 
Linked Data in Production: Moving Beyond Ontologies
Linked Data in Production: Moving Beyond OntologiesLinked Data in Production: Moving Beyond Ontologies
Linked Data in Production: Moving Beyond OntologiesDavid Newbury
 
Basic Building Blocks of Internet of Things.
Basic Building Blocks of Internet of Things.Basic Building Blocks of Internet of Things.
Basic Building Blocks of Internet of Things.YounusS2
 
Computer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and HazardsComputer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and HazardsSeth Reyes
 
COMPUTER 10 Lesson 8 - Building a Website
COMPUTER 10 Lesson 8 - Building a WebsiteCOMPUTER 10 Lesson 8 - Building a Website
COMPUTER 10 Lesson 8 - Building a Websitedgelyza
 
AI You Can Trust - Ensuring Success with Data Integrity Webinar
AI You Can Trust - Ensuring Success with Data Integrity WebinarAI You Can Trust - Ensuring Success with Data Integrity Webinar
AI You Can Trust - Ensuring Success with Data Integrity WebinarPrecisely
 
Empowering Africa's Next Generation: The AI Leadership Blueprint
Empowering Africa's Next Generation: The AI Leadership BlueprintEmpowering Africa's Next Generation: The AI Leadership Blueprint
Empowering Africa's Next Generation: The AI Leadership BlueprintMahmoud Rabie
 
Salesforce Miami User Group Event - 1st Quarter 2024
Salesforce Miami User Group Event - 1st Quarter 2024Salesforce Miami User Group Event - 1st Quarter 2024
Salesforce Miami User Group Event - 1st Quarter 2024SkyPlanner
 
Videogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdfVideogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdfinfogdgmi
 
Building AI-Driven Apps Using Semantic Kernel.pptx
Building AI-Driven Apps Using Semantic Kernel.pptxBuilding AI-Driven Apps Using Semantic Kernel.pptx
Building AI-Driven Apps Using Semantic Kernel.pptxUdaiappa Ramachandran
 
Meet the new FSP 3000 M-Flex800™
Meet the new FSP 3000 M-Flex800™Meet the new FSP 3000 M-Flex800™
Meet the new FSP 3000 M-Flex800™Adtran
 
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...UbiTrack UK
 
IaC & GitOps in a Nutshell - a FridayInANuthshell Episode.pdf
IaC & GitOps in a Nutshell - a FridayInANuthshell Episode.pdfIaC & GitOps in a Nutshell - a FridayInANuthshell Episode.pdf
IaC & GitOps in a Nutshell - a FridayInANuthshell Episode.pdfDaniel Santiago Silva Capera
 
UiPath Studio Web workshop series - Day 7
UiPath Studio Web workshop series - Day 7UiPath Studio Web workshop series - Day 7
UiPath Studio Web workshop series - Day 7DianaGray10
 
Connector Corner: Extending LLM automation use cases with UiPath GenAI connec...
Connector Corner: Extending LLM automation use cases with UiPath GenAI connec...Connector Corner: Extending LLM automation use cases with UiPath GenAI connec...
Connector Corner: Extending LLM automation use cases with UiPath GenAI connec...DianaGray10
 
KubeConEU24-Monitoring Kubernetes and Cloud Spend with OpenCost
KubeConEU24-Monitoring Kubernetes and Cloud Spend with OpenCostKubeConEU24-Monitoring Kubernetes and Cloud Spend with OpenCost
KubeConEU24-Monitoring Kubernetes and Cloud Spend with OpenCostMatt Ray
 

Dernier (20)

OpenShift Commons Paris - Choose Your Own Observability Adventure
OpenShift Commons Paris - Choose Your Own Observability AdventureOpenShift Commons Paris - Choose Your Own Observability Adventure
OpenShift Commons Paris - Choose Your Own Observability Adventure
 
Introduction to Matsuo Laboratory (ENG).pptx
Introduction to Matsuo Laboratory (ENG).pptxIntroduction to Matsuo Laboratory (ENG).pptx
Introduction to Matsuo Laboratory (ENG).pptx
 
Comparing Sidecar-less Service Mesh from Cilium and Istio
Comparing Sidecar-less Service Mesh from Cilium and IstioComparing Sidecar-less Service Mesh from Cilium and Istio
Comparing Sidecar-less Service Mesh from Cilium and Istio
 
201610817 - edge part1
201610817 - edge part1201610817 - edge part1
201610817 - edge part1
 
Linked Data in Production: Moving Beyond Ontologies
Linked Data in Production: Moving Beyond OntologiesLinked Data in Production: Moving Beyond Ontologies
Linked Data in Production: Moving Beyond Ontologies
 
Basic Building Blocks of Internet of Things.
Basic Building Blocks of Internet of Things.Basic Building Blocks of Internet of Things.
Basic Building Blocks of Internet of Things.
 
Computer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and HazardsComputer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and Hazards
 
COMPUTER 10 Lesson 8 - Building a Website
COMPUTER 10 Lesson 8 - Building a WebsiteCOMPUTER 10 Lesson 8 - Building a Website
COMPUTER 10 Lesson 8 - Building a Website
 
AI You Can Trust - Ensuring Success with Data Integrity Webinar
AI You Can Trust - Ensuring Success with Data Integrity WebinarAI You Can Trust - Ensuring Success with Data Integrity Webinar
AI You Can Trust - Ensuring Success with Data Integrity Webinar
 
Empowering Africa's Next Generation: The AI Leadership Blueprint
Empowering Africa's Next Generation: The AI Leadership BlueprintEmpowering Africa's Next Generation: The AI Leadership Blueprint
Empowering Africa's Next Generation: The AI Leadership Blueprint
 
Salesforce Miami User Group Event - 1st Quarter 2024
Salesforce Miami User Group Event - 1st Quarter 2024Salesforce Miami User Group Event - 1st Quarter 2024
Salesforce Miami User Group Event - 1st Quarter 2024
 
20230104 - machine vision
20230104 - machine vision20230104 - machine vision
20230104 - machine vision
 
Videogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdfVideogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdf
 
Building AI-Driven Apps Using Semantic Kernel.pptx
Building AI-Driven Apps Using Semantic Kernel.pptxBuilding AI-Driven Apps Using Semantic Kernel.pptx
Building AI-Driven Apps Using Semantic Kernel.pptx
 
Meet the new FSP 3000 M-Flex800™
Meet the new FSP 3000 M-Flex800™Meet the new FSP 3000 M-Flex800™
Meet the new FSP 3000 M-Flex800™
 
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...
 
IaC & GitOps in a Nutshell - a FridayInANuthshell Episode.pdf
IaC & GitOps in a Nutshell - a FridayInANuthshell Episode.pdfIaC & GitOps in a Nutshell - a FridayInANuthshell Episode.pdf
IaC & GitOps in a Nutshell - a FridayInANuthshell Episode.pdf
 
UiPath Studio Web workshop series - Day 7
UiPath Studio Web workshop series - Day 7UiPath Studio Web workshop series - Day 7
UiPath Studio Web workshop series - Day 7
 
Connector Corner: Extending LLM automation use cases with UiPath GenAI connec...
Connector Corner: Extending LLM automation use cases with UiPath GenAI connec...Connector Corner: Extending LLM automation use cases with UiPath GenAI connec...
Connector Corner: Extending LLM automation use cases with UiPath GenAI connec...
 
KubeConEU24-Monitoring Kubernetes and Cloud Spend with OpenCost
KubeConEU24-Monitoring Kubernetes and Cloud Spend with OpenCostKubeConEU24-Monitoring Kubernetes and Cloud Spend with OpenCost
KubeConEU24-Monitoring Kubernetes and Cloud Spend with OpenCost
 

Table 2: Unit 2 Reactor: Fukushima Daiichi Nuclear Power Plant - 11 May 2011

  • 1. TABLE 2. UNIT 2 REACTOR: FUKUSHIMA DAIICHI NUCLEAR POWER PLANT: 11 MAY 2011 ASSESSMENT OF STATUS IN TERMS OF FUNDAMENTAL SAFETY FUNCTIONS FOR ACHIEVING A SAFE STATE Necessary safety function and TEPCO Roadmap Observation Evaluation of safe state conditions countermeasures Reactor is subcritical and sub-criticality - No power spike or power increase ACHIEVED No additional Control of Reactivity is demonstrated and maintained - No significant neutron flux measured and reported Caution: countermeasures reported - Short lived fission products are not reported at the - Continue detection of neutrons moment (e.g. La-140) and short-lived isotopes Stable cooling shall be assured - Reactor vessel temperature is: (115.1 °C at NOT ACHIEVED Nos 1, 3, 4, 7, 8, 9, 13, 14, - Keep the coolant temperature feedwater nozzle, reactor pressure vessel Establishment of a long term closed- 16 and 17 Residual heat removal sufficiently below the boiling point pressure ≤ 1.0 atm based on available loop heat removal circuit is advised at atmospheric pressure measurements) - Cover the damaged core adequately - Water level of reactor core is below about with water −1500 mm (A) and −2100 mm (B) from the top - Off-site and back-up power supply of active core shall be available - Off-site power supply and backup power from - Achievement of long term closed- portable diesel generators are available loop heat removal capability - Fresh water injection is provided; however, closed-loop heat removal is not yet established - Containment is leak-tight - Containment is believed to be damaged: latest NOT ACHIEVED Nos 2, 6, 11 and 15 - Containment pressure is maintained measurements show the containment pressure to - Measures to make the Containment below design limits be around atmospheric containment leak-tight should integrity - Hydrogen explosion to be - Containment probably damaged following be pursued prevented. hydrogen explosion at this unit at 21:14 UTC on - Pressure and H2 concentration of 14 March 2011 the containment to be further monitored - Reactor pressure vessel (including - Reactor pressure vessel is assumed to be NOT ACHIEVED Nos 5, 10, 29–46, 50, 54 radioactive material connected systems) should not leak; leaking, most probably through connected Construction of a cover above the and 55 or if so the leakage shall be recirculation system (pump seal loss of coolant reactor building has to be pursued Confining confined within allowable limits accident) - Leakages from the containment - Containment is believed to be damaged: latest should be prevented or controlled, measurements show the containment pressure or shall be confined and reactor pressure vessel pressure to be around atmospheric [Type text]
  • 2. Necessary safety function and TEPCO Roadmap Observation Evaluation of safe state conditions countermeasures - No additional releases shall be - Intermittent releases have been observed NOT ACHIEVED Nos 12, 47–49, 51–53, 55– anticipated - Radiation monitors are available Measures to prevent radioactive 63 Limiting effects of releases - Radiation monitoring measurements - White smoke is observed emanating releases and leaking of water with The transfer of stagnant shall be available continuously from the reactor building high level radioactivity to the water from the turbine - Samples of water in the turbine building floor environment should be further building to the radioactive area show high radioactivity releases from the pursued waste treatment facilities is reactor and the containment to the environment continuing Work to block the trench pit to prevent release of water with high level radioactivity to the environment is ongoing