System concept for FBR cycle data base

Kofuji, Hirohide; ; *; *;

JNC TN9400 2000-055, 49 Pages, 2000/03

JNC-TN9400-2000-055.pdf:2.07MB

Accompanying with the progress of the "Feasibility study on FBR cycle system; FS" , various kinds of technical information, facility design parameters, and related data will be obtained and they should be stored in data bases and be used as fundamental data for the FS. So the several data bases are going to be set up at each section and controlled by the management system through a local area network. Among above data bases, a prototype of FBR cycle data base that will record data for FBR scenario study and synthetic assessment is to be completed in. Phase l by fiscal year 2000, so the data base system concept has been examined in the current fiscal year, 1999. As the results of the system concept examination, two types of prototypes have been selected, one is to be set up as the data table containing digital data that are extracted from technical papers, another is as image data of papers with index information. Referring to examples of data bases in other companies, it was kept in mind to use a package software for general purpose and to utilize data existing now.

Delta tracking Monte Carlo neutron transport with voxel mesh overlay

Ueki, Taro

no journal, , 

In this excerpt, it is shown that the delta-tracking combined with a voxel mesh and an index search is an efficient tool for the reactor physics analysis of random media. The essential idea is the use of delta-tracking in a selected region consisting of a base material where voxel mesh is overlaid, a particle flights by ignoring the mesh cell boundaries, and a fast index search is applied at the flight destination to identify where the particle is. It turns out that computational time remains the same over numbers of voxel mesh cells from the fourth power of ten to the eleventh power of ten. Numerical results are demonstrated in terms of the criticality analysis of the random substitution of SUS304 in fuel debris.