5-9 September 2016
Prague Congress Centre
Europe/Prague timezone

P2.160 Status of the engineering activities carried out on the European DCLL

6 Sep 2016, 14:20
1h 40m
Foyer 2A (2nd floor), 3A (3rd floor) (Prague Congress Centre)

Foyer 2A (2nd floor), 3A (3rd floor)

Prague Congress Centre

5. května 65, Prague, Czech Republic
Board: 160
Poster H. Fuel Cycle and Breeding Blankets P2 Poster session

Speaker

Angel Ibarra (CIEMAT, Avda. Complutense 40, 28040 Madrid, Spain)

Description

In the framework of the EUROfusion programme, Dual Coolant Lithium Lead (DCLL) breeding blanket is being investigated as a candidate for European DEMO, which is based on the use of Pb-17Li as breeder and coolant (“self-cooled breeding zone”) and high-pressure helium for cooling the structures made of reduced-activation ferritic steel (EUROFER). During the first part of the project, a conceptual design of the DCLL equatorial module has been finalized, that meets the requirements of tritium self-sufficiency and shielding. This first design was produced to work under normal, undisturbed operational conditions; therefore no special attention was paid on accidental scenarios. Thus, a new design of the DCLL equatorial module has been produced in a further step to comply with the in-box LOCA requirement. To reach higher robustness, the number of radial stiffening plates has been increased and the walls of the main box structure have been reinforced. The DCLL helium circuit has been considerably simplified due to lower cooling needs than initially expected. A lower mass flow rate is then required and the total He pressure drop is reduced, which finally contributes to the improvement of plant efficiency.  The Back Supporting Structure (BSS) consists in a unique piece which has two long PbLi poloidal ducts covering the whole segment length, having supporting and shielding functions. The rationale of the cooling scheme for the PbLi and He in the BSS is addressed. Corrosion and MHD phenomena in the BSS are also studied.      This paper includes the most relevant results on neutronics, thermal-hydraulic and mechanical calculations for the present DCLL design. Advances on the Flow Channel Insert (FCI) development are also presented, with special emphasis on two different proposals: a sandwich-like FCI which uses ceramic pebble beds between two steel plates or a simple highly dense alumina ceramic tube.

Co-authors

Angel Ibarra (CIEMAT, Avda. Complutense 40, 28040 Madrid, Spain) David Alonso (ESTEYCO, C. Menéndez Pidal 17, 28036 Madrid, Spain) David Rapisarda (CIEMAT, Avda. Complutense 40, 28040 Madrid, Spain) Fernando R. Urgorri (CIEMAT, Avda. Complutense 40, 28040 Madrid, Spain) Heiko Neuberger (KIT, Karlsruhe, Germany) Iole Palermo (CIEMAT, Avda. Complutense 40, 28040 Madrid, Spain) Ivan Fernandez (CIEMAT, Avda. Complutense 40, 28040 Madrid, Spain) Ladislav Vala (Research Centre Rez, Hlavní 130, CZ - 250 68 Husinec-Řež, Czech Republic) Luis Maqueda (ESTEYCO, C. Menéndez Pidal 17, 28036 Madrid, Spain) Maria Gonzalez (CIEMAT, Avda. Complutense 40, 28040 Madrid, Spain) Prachai Norajitra (KIT, Karlsruhe, Germany) Tomas Melichar (Research Centre Rez, Hlavní 130, CZ - 250 68 Husinec-Řež, Czech Republic)

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