efforts on reducing the capital costs of nuclear power through incremental improvements at the industrial level as well as through innovation through new research and development are thus an indispensable part of credible strategies to decarbonise the power sector this chapter has reviewed the discussion of this relationship in the various editions of the report it is beyond the scope of the present study to determine the correct discount factor the relationship of the discount factor to concerns regarding sustainability must however be discussed elsewhere and ideally before the next edition of projected costs