[en] The features of the DLTS detection of defects with retrappability of thermally excited carriers due to a large value of effective capture cross section are considered. Indications allowing identification of the implementation of the given model are found.

[en] Results and analyses are reported for TREAT in-pile transient overpower tests of margin to cladding failure and pre-failure axial expansion of metallic fuel. In all cases the power rise was exponential on an 8 s period until either incipient or actual cladding failure was achieved. Test fuel included EBR-II driver fuel and ternary alloy, the reference fuel of the Intergral Fast Reactor concept. Test pin burnup spanned the widest range available. The nature of the observed cladding failure and resultant fuel dispersals is described. Simple models are presented which describe observed cladding failures and pre-failure axial expansions yet are general enough to apply to all metal fuel types

[en] After outlining main characteristics of PIPER-ONE facility (a BWR thermalhydraulic simulator) the paper describes the results already achieved, as well as research perspectives

No abstract available

[en] TASS 1.0 is consisted of two parts. First part analyze the reactor transients and calculates system parameters during the transients. This part comprises the program of the primary and secondary thermal hydraulic model, the core model, the transfer model, the protection and the control system. The second part is the TASS executive routine. This part provides an operating system for TASS. The user can execute TASS with above models interactively through the TASS executive routine. But TASS executive routine is very large and the function is restricted. The development of GRIS( Graphical Routines for Interactive Simulation) was initiated to overcome the limitation of the TASS executive routine. TASS-NPA was developed based on GRIS. TASS-NPA simulation can be performed on Windows 95 and Window Nt of IBM Pc. The verification of the TASS-NPA function was performed with the Feed Water Line Break of Kori 3/4. (Author). 6 refs., 3 tabs., 26 figs

[en] An examination has been made of how the currently available computing capabilities could be used to reduce Liquid Metal Fast Reactor design, manufacturing, and construction cost. While the examination focused on computer analyses some other promising means to reduce costs were also examined. (author)

[en] Suppression of the floating body effects in partially depleted SOI-MOSFETs (silicon-on-insulator metal oxide semiconductor field effect transistors) with and without body contact electrodes has been investigated using nuclear microprobes with currents of 5-250 pA. Transient SOI-MOSFET behavior with and without body contact electrodes during ion irradiation by three-dimensional computer simulation has also been compared with that using nuclear microprobes. The floating body effects were observed in SOI-MOSFETs without body contact electrodes by nuclear microprobe irradiation, while those were suppressed in the SOI-MOSFETs with body contacts

No abstract available

[en] A series of in-reactor transient tests is underway to study the characteristics of metal-alloy fuel during transient-overpower-without-scam conditions. The initial tests focused on determining the margin to cladding breach and the axial fuel motions that would mitigate the power excursion. The tests were conducted in flowing-sodium loops with uranium - 5% fissium EBR-II Mark-II driver fuel elements in the TREAT facility. Posttest examination of the tests evaluated fuel elongation in intact pins and postfailure fuel motion. Microscopic examination of the intact pins studied the nature and extent of fuel/cladding interaction, fuel melt fraction and mass distribution, and distribution of porosity. Eutectic penetration and failure of the cladding were also examined in the failed pins

[en] The laser-induced transient grating method is applied to study the dynamics of the nematic MBBA film. The nanosecond laser pulses of 355 nm are used to make the transient grating and the cw He-Ne laser of 633 nm is used to probe the dynamics. Strong multiple order diffractions are observed at high nematic temperatures. The reordering process induced by the phototransformed state, which is the locally melted state from the nematic sample, is attributed to the main origin of the multiple order diffractions from the nematic MBBA. The characteristics of the multiple order gratings are discussed with the grating profiles simulated from the multiple diffraction signals