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ECN publication
Neutron metrology in the HFR: steel irradiation R287-02 (CHARIOT-02)
Published by: Publication date:
ECN NUC 1-3-1999
ECN report number: Document type:
ECN-I--98-025 Other
Number of pages: Full text:
50 Download PDF  

The experiment R287 (CHARIOT) is part of material program to teststainless steel of different types and has been irradiated in the HFR Petten. This report presents the final metrology results obtained from activation monitors in the specimen holder, coded as R287-02, and irradiated in a TRIO type capsule in HFR position G7. Data about the helium production as well as the number of displacements per atom are included. The aim of the irradiation of specimen holder R287-02 was to reach a maximum damage level of 2.5 dpa for the loaded specimens at a temperature of 300 deg C. The main results of the thermal and fast neutron fluence measurements, indicate that the obtained levels in the steel specimen holder range from 1.9 to 3.2 dpa. Detailed data are presented in tables 2, 3 and 4 as well as in figures 2 to 8 inclusive. Contrary to the target operation temperature of 300 deg C, the measured median temperature of the CT-specimens during irradiation ranged between 295 and 335 deg C. The irradiation temperature of the miniaturized Charpy specimens, coupons, TEM disks and mini tensile specimens is still under discussion. The originally calculated median temperatures for these type of specimens are between 324 and 358 deg C, which seems to be too high. 23 refs.

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