PEBBLE BED CANISTER - A CERAMIC BREEDER BLANKET WITH HELIUM COOLING FOR NET
A blanket concept based on a closed first wall (F.W.) vessel and on self-supporting canisters containing a bed of Li-4SiO-4 pebbles cooled by helium has been applied to a single and to a double null configuration for NET. The resulting tritium breeding ratio (TBR) is 1.31, however if a complete graphite protection of the F.W. is required the TBR decreases to 1.12. The tritium blanket inventory is relatively low if hydrogen is added to the helium purge flow. The blanket temperatures appear to be acceptable, however, if F.W. heat fluxes higher than 20 W/cm2 are assumed, then austenitic steel cannot be accepted as F.W. material in connection with a full graphite F.W. protection. A helium cooled divertor for heat fluxes up to 500 W/cm2 appears in principle feasible.
Bibliographic Reference: 14TH SOFT CONFERENCE, AVIGNON (FRANCE), SEPT. 8-12, 1986 VOL. 1, PP. 423-428 1895 P., 1986, VOL. 1 AND VOL. 2, ISBN 0 08 034935 8 WRITE TO PERGAMON PRESS, HEADINGTON HILL HALL, OXFORD, OX3 0BW (UK), PRICE: UKL 220 (FOR BOTH VOLS.)
Record Number: 1989126045701 / Last updated on: 1989-01-01
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