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Abstract

A computer model has been developed to evaluate tritium permeation to the coolant and tritium inventory in vanadium tubes in the SEAFP blanket. The mean tritium partial pressure in the gaseous breeder phase is in the range from 0.5 to 2.5 Pa for helium purge gas velocity from 0.1 to 0.4 m/s; in these conditions the tritium permeation to coolant changes from 32.8 to 16.4 g/day and the tritium inventory in vanadium tubes from 4000 to 2000 g. The H/T ratio involves a relevant tritium permeation variation: with 0.2 m/s helium purge gas velocity, on varying the H/T ratio from 100 to 50 the tritium permeation to coolant changes from 23.2 to 32.7 g/day. The analysis shows that defect free thin permeation barriers (SiC and Al(2)O(3)) are very effective at minimising the tritium permeation to coolant and the tritium inventory in tubes.

Additional information

Authors: TOSTI S, ENEA, Centro Ricerche Energia Frascati, Roma (IT);COLOMBINI A, ENEA, Centro Ricerche Energia Frascati, Roma (IT);VIOLANTE V, ENEA, Centro Ricerche Energia Frascati, Roma (IT);SIMBOLOTTI G, ENEA, Centro Ricerche Energia Frascati, Roma (IT)
Bibliographic Reference: Paper presented: 5th Topic Meeting on Tritium Technology in Fission, Fusion and Isotopic Applications, Lake Maggiore (IT), May 28 - June 3, 1995
Availability: Available from (1) as Paper EN 38886 ORA
Record Number: 199510515 / Last updated on: 1995-04-11
Category: PUBLICATION
Original language: en
Available languages: en