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Abstract In the EFTTRA- T4 experiment the irradiation behaviour of a target containing americium dispersed in MgAl(2)O(4) was studied. Pellets containing 10-12 wt% (241)Am were fabricated by the infiltration method. However, it was found that the americium, intended to be present as AmO(2-x), formed a compound, probably AmAIO(3), during sintering. The T4 target was irradiated in the High Flux Reactor (HFR) Pet ten from August 1996 to January 1998 (358.4 fpd's). Post-test bum-up calculations indicated that the (241)Am concentration is reduced to 4% of the initial value at the end of the irradiation. The fraction of the initial americium atoms that were fissioned is 28%. Non-destructive and destructive examinations of the target indicated that swelling of the target pellets occurred. This is attributed to accumulation of helium, produced by alpha decay of (242)Cm that occurs in the transmutation scheme of (241)Am.

Additional information

Authors: KONINGS R.J.M, Institute Transuranium Elements, Karlsruhe, (DE);SOMERS J, Institute Transuranium Elements, Karlsruhe, (DE);TOSCANO E, Institute Transuranium Elements, Karlsruhe, (DE);CONRAD R, JRC-Institute for Advanced Materials, Petten (NL);DASSEL G, JRC-Institute for Advanced Materials, Petten (NL);PIJILGROMS B.J, JRC-Institute for Advanced Materials, Petten (NL)
Bibliographic Reference: ART: 90254. Journal of Nuclear Materials 282 (2000) pp.159-170
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