Lesson 6 Tutorial

For your selected site, address the following five areas:

1. Site Description (Outline)

Describe the site in outline, including:

  • Location and geographical setting
  • Type of facility (reactor type, power output, operational history)
  • Date of first operation and date of final shutdown
  • Current site operator/SLC
  • Any notable features or historical significance

2. Decommissioning Method

Identify the general type of decommissioning method being used:

  • Which of the three stages is the site currently in?
  • Is the Safestore (deferred dismantling) approach being used?
  • What is the target end-state (greenfield/brownfield)?
  • What is the overall decommissioning strategy adopted?

3. Outline Site/Facility Characterisation

Carry out an outline characterisation by identifying:

  • The main radiological hazards present on the site
  • The types of radioactive contamination expected (activation products, fission products, contamination)
  • Key areas of the site requiring characterisation (reactor building, cooling ponds, waste stores etc.)
  • Any known contamination issues (e.g. ground contamination, liquid waste storage)

4. Timescales

Describe the timescales for the decommissioning:

  • Key milestones achieved to date
  • Expected dates for transition between stages
  • Planned date for Interim End State and/or Final End State
  • Total programme duration

5. Radiological Arisings

Identify and classify the radiological arisings expected:

  • Estimated quantities of HLW, ILW, LLW and Out of Scope Waste
  • Main sources of each waste category
  • Planned waste disposal routes
  • Any specific waste challenges (e.g. graphite waste, fuel element debris)