[en] The described irradiation assembly has been designed so that a) it can be adjusted to the dimensions of the material to be irradiated, b) individual parts can be reused, and c) it can be cooled effectively

No abstract available

[en] A continuous-flow/helium cryostat for the irradiation of materials with high energy electrons up to 50 μA/cm² beam density and subsequent annealing in the range 4.2- 500 K is described. During operation liquid helium is fed from a large storage vessel through a flexible vacuum-insulated transfer line. The cryostat design allows the storage vessel to be replaced without warming the samples. This eliminates any limitation on the length of continuous operation. In the range 150-500 K it is possible to use helium gas with either external cooling or internal heating. Helium consumption is up to 5 1/h (liquid) or 10 m³/h (gas) depending on the irradiation temperature and heat evolved in the irradiation zone. (Author)

No abstract available

[en] FFTF utilization for irradiation testing is beginning. Two Fuels Open Test Assemblies and one Vibration Open Test Assembly, both containing in-core contact instrumentation, are installed in the reactor. These assemblies will be used to confirm plant design performance predictions. Some 100 additional experiments are currently planned to follow these three. This will result in an average core loading of about 50 test assemblies throughout the early FFTF operating cycles

No abstract available

No abstract available

[en] The turning and positioning device is suitable for use in a swimming pool reactor. The upward and downward movement of the test capsule is done by a rope winch with a crank, where the channel consisting of several tubular pieces pushes outside or inside one another. In the lower end position, the rotation of the test capsule can be done by rotary movement of the tubular pieces. (DG)

[en] The Interim Examination and Maintenance (IEM) Cell is a vertical hot cell located within the containment dome of the Fast Flux Test Facility (FFTF). The cell has two basic functions: (1) to perform disassembly/reassembly and nondestructive testing on radioactive, sodium-wetted reactor components, and (2) to provide a shielded work volume where radioactive, sodium-wetted reactor and refueling equipment can be repaired and maintained. One of the recent FFTF experiments processed through the IEM Cell was the Material Open Test Assembly (MOTA). This paper describes the disassembly and reassembly of the MOTA test assembly

[en] A creep capsule with two specimens was designed, fabricated and irradiated during the period from Feb, 2004 to May, 2005. In the design stage, the reactivity effect was reviewed and an analysis for the structural and thermal integrity was performed to review the safety of the creep capsule. During the irradiation test, the temperature of the components and the displacement of the specimen were measured and analyzed. The temperature of the specimen during the test was 550±5 .deg. C over the whole irradiation period. The measured temperature of the components showed differences of not more than 90 .deg. C. when compared with the design values and this indicates the error range to be 18% or so when compared with the design values