Facility Vulnerability with VISAC

2D Triple View Slicer

This presents views of the plant along three cuts planes, one in each dimension, giving a section drawing similar to a standard engineering drawing. Each section view shows the geometry of the facility in that plane - top, front and side. Navigation is done with the mouse or using the menu options. This geometry viewer is also used to set blast points, regions of damage and set individual component failure probabilities for the different VISAC incidents.

Navigation

The blue lines in each view show the position of the cut planes for the section planes shown in the other views. To move the cut planes, use the slider bars in the lower left panel, type the values directly into the boxes in the lower left panel or click somewhere while holding the Shift key. Once the cut planes have been repositioned, use the 'Redraw' button to recalculate the views.

To zoom, in any view press the mouse button at one corner of your desired zoom area, drag to the opposite corner, then release. This will change the images in the view you selected and the other views sharing those coordinate axes. Zooms can also be done by adjusting the bounding box minimums and maximums in the center left panel. Type in the values and then use the Redraw button. Zooming can also be done using the options under the 'Scene' menu, option 'Camera', option 'Zoom In' or 'Zoom Out'. The full extent of the plant can be shown using the 'Scene' menu, option 'Camera', option 'Default View'.

Figure 6. A portion of the west560 plant shown with the Triple View Slicer

Standard Features

When the mouse is positioned in one of the three views, the status bar below the images shows the coordinates (usually feet), the name of the region, and the material code for the region. For detailed models, the names of critical components and their damage probabilities will also be displayed. For basic models, the building name will be displayed.

Colors for each material type present can also be selected by the user by using the 'Geometry' menu, 'Materials/Colors' option. Rendering of materials can be either as solid color areas (menu 'Scene', option 'Render Style', option 'Filled') or as colored outlines (menu 'Scene', option 'Render Style', option 'Edges'). The background color, used for undefined areas, can be set by using 'Scene' menu, 'Background Color' option. The default background color is white.

The 'File' menu allows the geometry to be exported or the current image to be saved.

'Export Geometry' option - writes out the geometry information in a variety of formats, including BRL-CAD, WaveFront and Unreal Tournament.
'Save Image as JPEG' - creates a *.jpeg file for the current view.
'Copy Image to Clipboard' - copies the current image to the system clipboard, which can then be pasted into other programs, such as MS Word.

Selecting a Region

When used to select a rectangular volume for a Region Damage incident or for the bounds of a QuickBlast Grid, the volume selected will be the volume enclosed by the bounding box values. The bounding box can be adjusted by typing the values directly into the 'Bounding Box' area (with the z values being feet above sea level) or by using the zoom features (click and hold left mouse button, drag across screen, release). To be sure which values will be used for the volume, use the 'Redraw' button. Once the desired volume has been selected, use the menu 'File', option 'COMMIT' to send that region back to the incident editor.

Selecting a Blast Point

When used to pick a blast point for a QuickBlast incident, the point returned will be the coordinates of the cut planes, whether or not the images have been redrawn. Adjust the cut planes in any of the ways described above so that the location of the blast is shown in the 'Cut Planes' box. To be sure of the point's values, use the 'Redraw' button. The selected point will be at the intersection of the blue lines in each view. Another way to move the cut planes is to click on the appropriate slider bar, and then use the arrow keys to move in increments of 1 foot. Once the desired point has been selected, use the menu 'File', option 'COMMIT' to send that point back to the incident editor.

Setting Component Damage

When used to set critical component failure probabilities for a Component Damage incident, simply click on a critical component to bring up a window to set that component's failure probability. Damaged components will appear in a different color. When done, simply close the viewer ('File', 'Close') and the updated component damage will be returned to the incident.

Oak Ridge National Laboratory, 2004

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