Dose rate around a primary cooling loop of the ITER plant with two different operational scenarios

To assess the activated corrosion products (ACP) inventories in the primary cooling loop of the ITER plant two operational scenarios are considered that have been studied in different approaches: the M5a and the BPP acp. Then external dose rates around the hot leg are calculated using the MCNP code and the resulting surface concentrations as source terms. A direct comparison of the dose rates calculated with both scenarios is made considering a specific component of the first wall loop. All the assessment procedure is described, from the ACP inventory evaluation to the dose rate calculation. Results are then discussed considering the radiological impact on the workers as well as the potential risk for the ACP inventory in the coolant (leakages and accidents).