Grid Project Title: Romanian 3D Structured Grid Version 1

Purpose of Project:

To create a three-dimensional Structured grid that incorporates stratigraphy from
a hydrostratigraphic model and encompases a 1 Km squared area around the potential
low level site. The grid will be used as part of a modeling study to calculate flow and
reactive transport, using FEHM, to help evaluate the suitability of storing low level
nuclear waste at the site.

Angle view of hydrostratigraphic model. The Different colors represent the Loess and Clay units in the Seven layer
conceptual model.

Angle view of 3D mesh. 5 times vertical.

Grid Team Member(s): Marc Witkowski
Grid Version: 1
Data Source: /scratch/stoshu2/Witk/Romanian/2001/Geology/Ver01/Romanian0001.tfm
Delivered To: Kay Birdsell, Bruce Robinson, and George Zyvoloski
Date Completed: 10/18/2000

Design Criteria:

Use stratigraphy from 3D Hydrostratigrahic model for material designations.
Create a mesh that captures the location where the proposed repository will be sited.
Create a structured grid with tetrahedral elements that can be computed by FEHM.

Summary of Project:

A three-dimensional grid was created with a domain that captures the location of the
proposed repository. The grid incorporates stratigraphy from a 3D Hydrostratigraphic
model for material designations. The grid contains no negative coefficients and is
computable by FEHM.

Grid Summary:

Dimension: 3
Grid Element Type: Tetrahedral
Number of Nodes: 34,437
Number of Elements: 186,174
Number of Materials: 7
Element Resolution in X Dim: 20 Meter
Element Resolution in Y Dim: 20 Meter
Element Resolution in Z Dim: 1 Meter

Grid Software Used:LaGrit

Grid Method: 3D Structured Mesh.

Project Archive Location:

/scratch/stoshu2/Witk/Romanian/2001/Grid_gen/Rom2001_3Dv1/

FEHM Files:

rom2001_3Dv1.fehmn
rom2001_3Dv1.stor
rom2001_3Dv1_material.zone
rom2001_3Dv1_outside.area
rom2001_3Dv1_outside.zone

Graphics files to look at:

rom2001_3Dv1.gmv
rom2001_3Dv1.inp

Grid Materials:

Mat 1.......Clay 2
Mat 2.......Clay 1
Mat 3.......Loess B2
Mat 4.......Loess B1
Mat 5.......Loess B
Mat 6.......Loess A1
Mat 7.......Loess A