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Title:
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Neutron metrology in the HFR: steel irradiation R139-801 (SINAS)
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Author(s):
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Published by:
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Publication date:
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ECN
NUC
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1-2-1999
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ECN report number:
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Document type:
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ECN-I--98-054
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Other
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Number of pages:
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Full text:
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32
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Download PDF
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Abstract:
The R139-80 series irradiation experiments is part of the NRG materialstest programme to evaluate the irradiation behaviour of several types of
austenitic stainless steel. Within this programme five R139-80 specimen
holders were irradiated in the HFR Petten to different dose levels. This
report presents the final metrology results obtained from activation monitors
in a specimen holder, coded as R139-801, containing 12 Compact Tension (CT-10
mm) specimens made from the austenitic stainless steel types 308LSXB/TIG and
304-SXB. The R139-801 assembly was irradiated in channel 1 of a TRIO type
facility placed in HFR core-position F8. The aim of this irradiation of
specimen holder R139-801 was to reach a minimum target damage level of 7.5
dpa for the specimens at a temperature of 335C. The monitor sets are used to
calculate the thermal and fast neutron fluences, displacements per atom and
the generated helium content. Additionally detailed information concerning an
estimation of the fluence and damage doses received by each specimen and its
temperature during irradiation are presented. The main results of the thermal
and fast neutron fluence measurements are presented. The results indicate
that the obtained damage levels in the steel specimens loaded in this
specimen holder vary from 5.8 to 7.9 dpa. The temperatures of the specimens
during irradiation varied between 304 and 337C. 14 refs.
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