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ECN publication
Neutron metrology in the HFR: vanadium irradiation R287-01 (CHARIOT-01)
Published by: Publication date:
ECN NUC 1998
ECN report number: Document type:
ECN-I--98-039 Other
Number of pages: Full text:
37 Download PDF  

ECN is working on the assessment of low temperature irradiation hardeningand embrittlement of radiation alloys, as being developed for fusion application. The irradiation of specimen holder R287-01 (CHARIOT-01), the specimens made of three types of vanadium alloys, is a part of this program. The R287-01 assembly was irradiated in channel 3 of a TRIO type facility in the HFR core position G5 up to a target dose level of about 6 dpa (displacements per atom) in vanadium at a normal temperature of 300C. This report presents the final metrology results obtained from activation monitor sets located in the specimen channels inside the specimen holder. The total number of displacements per atom and the generated helium content are included as well. The main results of the thermal and fast neutron fluence measurements are presented. The results indicate a damage range of 3.6 to 6.3 dpa. Unfortunately the irradiation was disturbed by a water leak in the capsule, which caused a very low irradiation temperature (=100C) during 7 days at the start of the last HFR-cycle (96-11). 15 refs.

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