Fabrication and operation of HFIR-MFE RB spectrally tailored irradiation capsules
- Oak Ridge National Lab., TN (United States)
The objective of this work is to fabricate and operate irradiation capsules for irradiating magnetic fusion energy (MFE) candidate first-wall materials in the High Flux Isotope Reactor (HFIR) removable beryllium (RB{sup *}) positions. Japanese and US MFE specimens are being transferred to RB{sup *} positions following irradiation to 7.5 dpa at temperatures of 60, 200, 330, and 400{degree}C in Oak Ridge Research Reactor (ORR) experiments ORR-MFE-6J and -7J. Fabrication and operation of four HFIR-MFE RB{sup *} capsules (60, 200, 330, and 400{degrees}C) to accommodate MFE specimens previously irradiated in spectrally tailored experiments in the ORR are proceeding satisfactorily. With the exception of the 60{degrees}C capsule, where the test specimens are in direct contact with the reactor cooling water, specimen temperatures (monitored by 21 thermocouples) are controlled by varying the thermal conductance of a thin gas gap region between the specimen holder outer sleeve and containment tube. Irradiation of the 60 and 330{degrees}C capsules was started on July 17, 1990. As of September 30, 1992, these two capsules had completed 22 cycles of their planned 24-cycle (formerly 22-cycle) irradiation to a damage level of approximately 18.3 displacements per atom (dpa). Assembly of the 200 and 400{degrees}C capsules is scheduled for completion in November 1992; operation of these two capsules will follow the first two (60 and 330{degrees}C).
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- OSTI ID:
- 139202
- Report Number(s):
- DOE/ER-0313/13; ORNL/M-2722; ON: DE93013462; TRN: 93:001624-008
- Resource Relation:
- Other Information: PBD: [1992]; Related Information: Is Part Of Fusion reactor materials semiannual progress report for period ending September 30, 1992; PB: 378 p.
- Country of Publication:
- United States
- Language:
- English
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