12/7/2023 0 Comments Irc co 3600 xscanThis methodology has been applied to a particular reactor as part of an overall safety reanalysis completed in support of plant modifications. In response to these concerns, Westinghouse has developed a comprehensive analysis process for determining the effects of assembly bow on core power distributions and plant operating margins. Concerns have been raised regarding the impact of the observed assembly bow on the in-core power distribution and the safety analyses supporting the plant operations. Assembly bow can take on a rather complex S-shape, and in other cases C-shape bow is prevalent. Franceschini, FaustoĮxcessive out of core assembly bow has been observed during refueling outages of certain PWRs. 18 discusses the Hutchins-Schelleng violin octet.įetterman, Robert J. Chapter 17 discusses viols and other historic string instruments, and Chap. Chapters 13-15 discuss the violin, the cello, and the double bass. In this chapter, we present a brief discussion of bowed strings, a subject that will be developed much more thoroughly in Chap. In the next eight chapters, we consider some aspects of the science of bowed string instruments, old and new. The contributions of other potential factors leading to increased channel bow and channel-control blade interference are also discussed in this paper. The increased corrosion on the control blade sides was found to be dependent on the level of control early in the life of the channel. A new mechanism of control-blade shadow corrosion-induced channel bow was found to correlate with differences in the extent of corrosion and corresponding differences in the hydrogen concentration between opposite sides of the channels. The PIE performed on these coupons included visual examination, metallography, and hydrogen concentration measurements. The coupons were obtained at 4 elevations from opposing channel sides adjacent and away from the control blade. The channels selected for PIE had exposures in the range of 36-48 GWd/MTU and covered a wide range of measured bow. This paper describes the characteristics of channel corrosion and hydrogen pickup observed, and relates the observations to the channel exposure level, control history, and measured channel bow. In order to investigate this new type of channel bow, coupons from several channels with varying degrees of bow were returned to the GE Vallecitos Nuclear Center (VNC) for Post-Irradiation Examination (PIE). The pattern of bow appeared to indicate a new channel bow mechanism that differed from the predominant bow mechanism caused by differential growth due to fast-fluence gradients. Many of the channels leading to interference were found to bow towards the control blade in a manner that was inconsistent with the expected bow due to other effects. Mader, E.V.Īn increase in frequency of fuel channel-control blade interference has been observed in Boiling Water Reactors (BWR) in recent years. International Nuclear Information System (INIS) Furthermore, there were clear indications that the players adapted the bowing parameters to the physical properties of the string and the instrument, respecting the limits of the playable control parameter space.Ĭhannel Bow in Boiling Water Reactors - Hot Cell Examination Results and Correlation to Measured Bow The results revealed clear trends in the coordinated variations of the bowing parameters depending on the constraints of the task, reflecting a common behavior as well as individual strategies. An analysis of bowing strategies in detache playing of notes of three durations (0.2, 2, and 4 s) at three dynamic levels (pp, mf, and f) on all four strings is presented, focusing on the "steady" part of the notes. The measurements allowed for a detailed analysis of the use and coordination of the main bowing parameters bow velocity, bow force, and bow-bridge distance. The player and the bowed string: coordination of bowing parameters in violin and viola performance.Īn experiment was conducted with four violin and viola players, measuring their bowing performance using an optical motion capture system and sensors on the bow.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |