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Induced activity of several candidate superconductor materials in a tokamak-type fusion reactor
- Source :
-
Journal of Nuclear Materials . Aug2004, Vol. 329-333, p1590-1593. 4p. - Publication Year :
- 2004
-
Abstract
- The induced activity and compositional change of several superconducting materials such as Nb-based alloys, V-based alloys and MgB2 have been evaluated with a numerical calculation. We assume that the materials are irradiated for 10 MW a/m2 at the magnet of the inboard position of a tokamak-type fusion reactor with a neutron wall loading of 1 MW/m2. The materials are Nb3Sn, Nb3Al, NbTi, NbZr, V2Zr, V2(Zr,Hf), V3Ga, V3Si and MgB2. Most of the induced activity of V-based alloys and MgB2 after the shutdown of the reactor is controlled by the 60Co formed from Cu. After the irradiation, the dose rate decreases to a safe level of 10 μSv/h within 30 years. However, Nb-based alloys are predicted to emit gamma rays for tens of thousands years. The compositional changes and irradiation damage of V-based alloys and MgB2 are minimal. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00223115
- Volume :
- 329-333
- Database :
- Academic Search Index
- Journal :
- Journal of Nuclear Materials
- Publication Type :
- Academic Journal
- Accession number :
- 14109683
- Full Text :
- https://doi.org/10.1016/j.jnucmat.2004.04.164