Estimation on tritium production and inventory in beryllium

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:197027

Shimakawa, S; Sagawa, H; Kuroda, T ^[1]

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1. Japan Atomic Energy Research Inst., Ibaraki-ken (Japan); and others

Beryllium has been proposed as a candidate material for neutron multiplier on fusion blanket design, tritium will be produced and accumulated in beryllium during neutron irradiation. It is very important to estimate the tritium inventory on blanket design. Tritium production and inventory under 3.0 GW fusion power were calculated for the layered pebble bed blanket, with Li{sub 2}O breeder and beryllium multiplier. Neutronics calculations were carried out by one-dimensional transport code, ANISN and tritium production was calculated by direct reaction of {sup 9}Be(n,T){sup 7}Li and two-step reactions of {sup 9}Be(n,{alpha}){sup 6}Li(n,{alpha})T. At the position near first wall, the direct reaction occupied the majority of tritium production. However, at the position of the mid-depth, contribution of the two-step reaction was included the production from neutron slow down by beryllium itself. The ratio accounting for 50% of total tritium production of two-step reaction production over whole blanket for one year full power operation (FPY) was resulted.

• OSTI ID: 197027
• Report Number(s): CONF-940664--
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
A CODES
BERYLLIUM
BREEDING BLANKETS
INVENTORIES
NEUTRON REACTIONS
NEUTRON REFLECTORS
PRODUCTION
TRITIUM