This project is related to the evaluation of fuelling requirements and transient density behaviour in ITER reference operational scenarios. The following activities will be covered:

a)      Evaluation of the fuelling requirements for gas-puffing and pellet fuelling for a range of operational scenarios for stationary and transient phases

b)      A sensitivity analysis of these requirements to assumptions regarding edge and core plasma transport and pellet deposition (including the effects of the loss of pellet deposited particles by ELMs)

c)      An evaluation of the power fluxes to PFCs during transient L-H and H-L phases and their possible control by the injection of varying rates of extrinsic impurities with a W divertor

d)     An evaluation of the extrinsic impurities seeding requirements needed to maintain control of the power fluxes to PFCs during stationary and slowly varying phases of the discharge (flattop and current ramp up/down)

e)      Additional modelling aimed at complementing the work of a) to d) as well as providing support to F4E in the evaluation of ITER scenarios and ITER control capabilities