RFSP-IST UNIX Simulations, and the Application of Sourceforge Prepared By: Aditi Garg Summer Student May-Sept 2005

Outline RFSP-IST -Reactor Fuelling Simulation Program Industry Standard Toolset AECL SourceForge (SF) Foundry - Delivery of software products and services over the internet.

CANDU Basic Lattice Cell  basic building block of the CANDU design  Dimensions  1 lattice pitch by 1 lattice pitch by 1 fuel- bundle length ( cm x cm x cm)  Basic lattice cell components:  1-bundle length of pressure tube, with fuel bundle and heavy-water coolant  calandria tube, concentric with the pressure tube and separated from it by an isolating gas gap  associated volume of heavy-water moderator

(not to scale) CANDU Basic Lattice Cell (with 37-Element Fuel)

CANDU Reactivity Devices  Reactor core  reactivity devices  zone controllers and adjusters, which are positioned interstitially between fuel channels

Reactor-Physics Computational Scheme  CANDU neutronics consists of three stages. -Computer programs developed to perform calculations  Three Stages:  Lattice-Cell Calculation (POWDERPUFS-V or WIMS-IST)  Reactivity-Device (Supercell) Calculation (DRAGON)  Finite-Core Calculation (RFSP-IST)

RFSP RFSP-IST (Reactor Fuelling Simulation Program - Industry Standard Toolset)  Computer program to do neutronics (static, quasistatic, and dynamic) calculations for CANDU reactors  RFSP can calculate both static and kinetic neutron flux and power distributions in the core in two energy groups and three dimensions.  RFSP can be used to simulate reactor operations, including refuelling and burnup steps.

 Modular in nature  Each module  specific function.  model definition  time ‑ average and instantaneous calculations of the in ‑ core flux  power distributions  kinetics calculations  execute independently of one another and share data through the RFSP direct ‑ access file RFSP

RFSP-IST (Reactor Fuelling Simulation Program - Industry Standard Toolset) Calculates the static 3-D flux distribution in the core by either of two methods:  the solution of the finite ‑ difference diffusion equation in two energy groups  a flux ‑ mapping method, using a modal expansion of the flux in a series of pre ‑ calculated flux modes

RFSP Release Verification  RFSP code  Running simulations in UNIX  Developed KORN Shell scripts and Fortran executables to automate generation of verification reports  Comparison of data through different RFSP versions to AECL Versions [ACR Feature requests]  Platforms used: HP, LINUX, PC

RFSP Release Verification  Verification involves the comparison of the outputs generated by different versions.  Results generated by two versions be similar,  Behaves consistently with respect to both platforms.  The comparison is in the form of a percent difference of key parameters  i.e. reactivity and maximum bundle and channel powers.

Verification Summary  RFSP Report  Contains all modifications  Results provided with different compilers were not the same  Errors  related to numerical rounding or truncation % difference > 0.5%, parameter is flagged  Comparisons showed that no unacceptable differences were found

AECL SourceForge (SF) Foundry Delivery of software products and services over the internet. An exchange of information between AECL and customer staff. –Used for code activities & documentation for external customers. –Provides access to documents, feature requests, support requests & to track bugs.

AECL SourceForge (SF) Foundry

–Reporting techniques  Generates filtered graphical displays  Illustrates work pending for days, weeks, months and years EXAMPLE: NUCIRC Project (similar to RFSP)

Source Forge cont’d Comprises of:  Bug Tracking System  Tech Support Tracking System  Patch Tracking System  Feature Request Tracking System  Public Forums Help Open Discussion  Site hosting, permanent file archival, full backups, and total web-based administration.  *RFSP-IST Home Page

RFSP WEBSITE Hummingbird Exceed – Visualize desktop of a Linux Session  Many updates to the RFSP website made using the software development environment ECLIPSE Platform Version on the RedHat LINUX operating system.  Open source PHP scripting programming language was used for website development.  Using VNCViewer  remote desktop environment. VNCViewer is an Xt-based client application for the VNC (Virtual Network Computing) system. VNC software is cross-platform, allowing remote control between different types of computer.

Thank you!!