Abstract
The integral-differential equation of neutron balance for the beryllium burn up in breeder blankets of a fusion reactor is written and solved analytically to estimate the beryllium depletion in blankets having the beryllium as neutron multiplier. The beryllium depletion in the first and the second beryllium layers behind the first wall of a Japanese layered pebble bed blanket proposed for the ITER breeding blanket is estimated to be about 9% and 6.5% after the 3 MW {center_dot} a/m{sup 2} fluence of 14-MeV neutrons on the first wall, respectively. The corresponding decrease of local tritium breeding ratio at the toroidal midplane was calculated to be barely less than 0.5%. The beryllium depletion in the breeder blanket of a DEMO fusion reactor is expected to be by 3 to 7 times larger than that for the ITER design, subject to the blanket design, the neutron fluence, etc. This beryllium depletion may decrease the tritium breeding ratio well below 1%, the margin above which the subject is to be addressed seriously. (author).
Zimin, S
[1]
- Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment
Citation Formats
Zimin, S.
A simplified method to estimate beryllium burn up in breeder blankets of a fusion reactor and its impact on a tritium breeding.
Japan: N. p.,
1993.
Web.
Zimin, S.
A simplified method to estimate beryllium burn up in breeder blankets of a fusion reactor and its impact on a tritium breeding.
Japan.
Zimin, S.
1993.
"A simplified method to estimate beryllium burn up in breeder blankets of a fusion reactor and its impact on a tritium breeding."
Japan.
@misc{etde_10149401,
title = {A simplified method to estimate beryllium burn up in breeder blankets of a fusion reactor and its impact on a tritium breeding}
author = {Zimin, S}
abstractNote = {The integral-differential equation of neutron balance for the beryllium burn up in breeder blankets of a fusion reactor is written and solved analytically to estimate the beryllium depletion in blankets having the beryllium as neutron multiplier. The beryllium depletion in the first and the second beryllium layers behind the first wall of a Japanese layered pebble bed blanket proposed for the ITER breeding blanket is estimated to be about 9% and 6.5% after the 3 MW {center_dot} a/m{sup 2} fluence of 14-MeV neutrons on the first wall, respectively. The corresponding decrease of local tritium breeding ratio at the toroidal midplane was calculated to be barely less than 0.5%. The beryllium depletion in the breeder blanket of a DEMO fusion reactor is expected to be by 3 to 7 times larger than that for the ITER design, subject to the blanket design, the neutron fluence, etc. This beryllium depletion may decrease the tritium breeding ratio well below 1%, the margin above which the subject is to be addressed seriously. (author).}
place = {Japan}
year = {1993}
month = {Dec}
}
title = {A simplified method to estimate beryllium burn up in breeder blankets of a fusion reactor and its impact on a tritium breeding}
author = {Zimin, S}
abstractNote = {The integral-differential equation of neutron balance for the beryllium burn up in breeder blankets of a fusion reactor is written and solved analytically to estimate the beryllium depletion in blankets having the beryllium as neutron multiplier. The beryllium depletion in the first and the second beryllium layers behind the first wall of a Japanese layered pebble bed blanket proposed for the ITER breeding blanket is estimated to be about 9% and 6.5% after the 3 MW {center_dot} a/m{sup 2} fluence of 14-MeV neutrons on the first wall, respectively. The corresponding decrease of local tritium breeding ratio at the toroidal midplane was calculated to be barely less than 0.5%. The beryllium depletion in the breeder blanket of a DEMO fusion reactor is expected to be by 3 to 7 times larger than that for the ITER design, subject to the blanket design, the neutron fluence, etc. This beryllium depletion may decrease the tritium breeding ratio well below 1%, the margin above which the subject is to be addressed seriously. (author).}
place = {Japan}
year = {1993}
month = {Dec}
}