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Decommissioning Nuclear Reactors - PowerPoint PPT Presentation


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Decommissioning Nuclear Reactors. Background. Before a company decides to close it’s power reactors the facility must be put in to a state that it no longer has a residual radioactive level, a clean up of all radioactive contaminated systems and structures, and the removal of radioactive fuel.

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Presentation Transcript
background
Background
  • Before a company decides to close it’s power reactors the facility must be put in to a state that it no longer has a residual radioactive level, a clean up of all radioactive contaminated systems and structures, and the removal of radioactive fuel.
decommissioning strategies
Decommissioning Strategies
  • There are three main strategies to decommission a nuclear facility. The first, being the fastest, is known as DECON (Decommission). This is the immediate dismantlement of the facility and all parts of said facility are decontaminated to a safe level.
safe storage
Safe Storage
  • The second type is SAFSTOR, it takes longer than DECON and in this a nuclear facility is monitored until the radioactivity decreases to a level that allows the facility to be dismantled without decontamination requirements. Essentially storing the materials until deemed safe enough for removal.
entombing
Entombing
  • The final type is ENTOMB.
  • As the word suggests, this is where the structure become permanently encased by a material that would prevent the leaking of radioactive materials. Once the radioactive material decays to be considered harmless the property is released.