1. Long-lived radionuclide activity formed in ITER construction steels in 6Li-D converter neutron field.
- Author
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Pohorecki, W., Jodłowski, P., Pytel, K., and Prokopowicz, R.
- Subjects
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RADIOISOTOPES , *NEUTRONS , *STEEL industry , *GAMMA distributions , *NEUTRON flux - Abstract
Long-lived gamma-emitting radionuclide activity forming in the 6 Li-D converter neutron field measurements and calculations were conducted for some ITER construction steels. Activation foil method and unfolding techniques were used to measure the neutron flux density; the mean neutron flux density was 2.03E13 n/(cm 2 s) whereas total fluence equalled 9.87E18 cm −2 . The activity measurements were done by means of gamma-ray spectrometry. Activity calculations were done by means of FISPACT-II code and experimentally determined neutron flux. Long-lived gamma emitting radionuclides activity in steel samples was, in average, about 1.9 MBq/g 1 year after activation; the dominant radionuclides were 60 Co, 54 Mn and 58 Co (about 52%, 24% and 20% of total activity respectively). The calculated to experimental values ratio (C/E) for particular radionuclides varies generally in range from 0.52 for 57 Co to 1.38 for 51 Cr. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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