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====== Tutorial 11-Using the module library ======

====Overview and Objective====
This tutorial uses a simplified version of the core [[sub-system|sub-systems]] used for the **SR97** post closure safety assessment. You will install a [[Library|library]] containing three sub-systems; the **near field**, the **geosphere** and the **biosphere**. By combining these three sub-systems you will simulate the transport of [[radionuclide|radionuclides]] of the U-238 [[radionuclide_decay_chain|decay chain]] from the source (a broken canister) to water bodies on the surface.   

After this tutorial, you will have learned to construct a [[model|model]] by combining [[sub-system|sub-systems]] from an [[library|Ecolego library]]. 

====Installing the library====

  - Download and unzip archive with library file {{sr97.zip}}
  - From the **File menu**, choose **Library** > **Manage library...**
  - Click the **Import…** button and choose the file “**SR97.ecl**”. When you close the file window, a folder named SR97 should appear in the list below.
  - Open the folder by pressing the + symbol and assert that it contains the three sub-systems “Biosphere”, “Geosphere” and “Nearfield”.
  - Close the window

====Adding the Nearfield sub-system====
  - Download and unzip archive with file “**SR-97 empty.eco**” {{sr_97_empty.zip}}. This project contains only some [[simulation_settings|simulation settings]].
  - Click **File** > **Open project** and select the file “**SR-97 empty.eco**”. 
  - In the **[[graph_window|Graph window]]** , right-click and select **Get from library…**
  - From the window that appears, select **Nearfield** and click **Ok**.
  - A [[sub-system|sub-system]] should now be placed on the graph. You can open the sub-system by clicking the + symbol
  - Switch to the simulation layout by clicking the Simulation button in the toolbar. 
  - Click the Run toolbar button or select Simulation > Run from the menu.
  - When the simulation has finished, the Results window displays a folder with the date and time of the simulation. Open this folder by clicking the small + sign. Next, open the sub-folder named Nearfield. It contains the further nested folders with outputs for the different discretizations of the barriers around the capsule. In the bottom, there is an output named Q_flux. This output contains the flow of radionuclides from the nearfield to the bedrock. 
  - Select the **Q_flux** output. From the list below, click **(All)** to include all the radionuclides (by default, only the first radionuclide, I-129, is selected). 
  - A plot over time should appear in the **Charts** window. Make sure that the scale is log by clicking the **Log x** and **Log y** buttons beneath the chart. You can also add a legend by selecting a legend position from the Legend drop down list. 
{{tutorial11.png}}

====Adding geosphere====
You will now add a sub-system representing the geosphere and make sure that it is properly connected to Nearfield.
  - Return to the modelling window layout by clicking the Modelling button in the toolbar. 
  - If you have opened the Nearfield sub-system, close it.
  - Right-click an empty area of the graph and select Get from library…
  - Select Geosphere from the list and close the window by clicking Ok.
  - Ecolego will now ask if you want to automatically connect Geosphere to other sub-systems in the model. Click Ok.
  - The Geosphere sub-system should now appear, with a connector from Nearfield to Geosphere.
  - Select the connector, and inspect it in the Information window. The connector makes sure that some parameter values, as well as the output flux (Q_flux) from the Nearfield are transferred to the Geosphere.
  - Run a simulation and create a plot of the output Geosphere > Geosphere flux out. This output represents the release of contaminants to the surface. 
{{tutorial11_1.png}}

====Adding biosphere====

You will finalize the tutorial by adding a sub-system for the sea which is located on the surface. Instead of letting Ecolego automatically connecting it to Geosphere, you will do it yourself.

  - In the graph, add the Biosphere sub-system. When asked if you want to automatically connect it to other sub-systems, click Cancel.
  - When the Biosphere sub-system appears on your screen, move the mouse cursor to the center of the Geosphere sub-system. A green outline should be displayed. While keeping the left mouse button pressed, move the mouse cursor to the center of the Biosphere sub-system. When you release the mouse button a connector should appear from Geosphere to Biosphere. 
  - Right-click the connector and select Edit.
  - The only output of the Geosphere (Geosphere flux out) should be connected to the only input of the Biosphere (also named Geosphere flux out). 
  - Close the window without making any changes.
  - Run a simulation.
  - Create a plot of Biosphere > C_Seawater, which represents the activity concentration in sea water.
{{tutorial11_2.png}}

**References**

  * [[Tutorials|Back to Tutorials]]
  * [[start|Home]]
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