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November 1990
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4 Reads
Measurements of helium concentration have been made on Fe-15.1Cr-34.5Ni specimens irradiated at 330, 400, 500 and 600°C after irradiation in ORR to displacement levels ranging from 12.6 to 13.8 dpa. The measurements compare well to previously calculated values, being 4 to 8% lower. Minor differences in helium content were also observed between specimens from capsules that were assumed to have possessed identical spectral environments. 6 refs., 1 fig., 2 tabs.
1 Read
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6 Citations
... Apart from the instability of γ' precipitates occurring during ion or fast neutron irradiation, some other factors which should be taken into consideration while servicing in a reactor environment such as the helium effects, have not been investigated. In nuclear materials containing Ni, large amount of helium might be produced through the (n, α) transmutation via absorption of neutrons at thermal energies [23,24]. Taking Inconel X-750 components in cores of Canada Deuterium and Uranium (CANDU) reactors as an illustration, the production rate of helium by Ni transmutation reaches as high as 3×10 −4 atoms helium per dpa [9,24]. ...
