Solving Neutron Problems with Commercial Finite Element Method Codes

In summary, the conversation discusses the use of various codes, such as CASMO and SIMULATE, for solving neutron problems in nuclear reactors. The speaker is curious about the potential use of commercial finite element method code, like ANSYS, for this purpose. It is mentioned that there are efforts to develop 3D FEA-based neutronics codes, but it is not believed that ANSYS would be suitable for this application. The importance of having a cross-section library for each assembly lattice is also mentioned.
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As I know, the method to solve neutron problem is divided into two steps now, neutron transport calculation for fuel assemblies and neutron diffusion calculation for whole reactor core, both using specified code such as CASMO and SIMULATE from STUSVIK. I want to know whether the commercial finite element method code such as ANSYS can be edited to solve neutron problem by one step, using fine energy group structure. For the code like ANSYS has very good expansibility and is very suitable for the HPC calculation, we may have a code not very fast but can work on HPC cluster to get accurate solution for neutron problem. Is there any efforts on such work had been done by any institute or company all over the world?
 
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  • #2


I don't believe anyone is seriously proposing to solve fuel rod/assembly/core neutronics with ANSYS. However, there are efforts to build 3D FEA-based neutronics codes, e.g., DENOVO and MPACT (derived from DeCART).

One needs a cross-section library for each assembly lattice as a function of burnup. CASMO is the cross-section library for SIMULATE. SIMULATE has a simple fuel rod model for calculating fuel temperature and a relatively simple thermal-hydraulics model for developing the coolant (moderator) state. I don't see the value in doing this with ANSYS.
 
  • #3


Yes, I can't see ANSYS being useful in this application.
 

1. What is the Finite Element Method (FEM)?

The Finite Element Method is a numerical technique used to solve engineering and scientific problems. It involves dividing a complex problem into smaller, simpler elements and solving them individually. FEM is commonly used in structural analysis, heat transfer, fluid dynamics, and other fields.

2. How does FEM relate to neutron problems?

FEM can be used to solve neutron problems by modeling the behavior of neutrons in a system and predicting their interactions with materials. This can be useful in designing nuclear reactors, optimizing shielding materials, and other applications related to neutron transport.

3. What are commercial FEM codes?

Commercial FEM codes are software packages that implement the Finite Element Method and provide a user-friendly interface for creating and solving complex simulations. These codes are often used in engineering and scientific industries for their versatility and efficiency.

4. What are the advantages of using commercial FEM codes for neutron problems?

Commercial FEM codes offer a range of advantages for solving neutron problems, including their ability to handle complex geometries, accurately model material properties, and provide efficient and accurate solutions. They also often have advanced features and user support, making them a reliable tool for solving challenging neutron problems.

5. Are there any limitations to using commercial FEM codes for neutron problems?

While commercial FEM codes are powerful tools, they do have some limitations when it comes to solving neutron problems. These may include difficulties in modeling certain types of neutron interactions, limited availability of specialized nuclear materials and boundary conditions, and the need for expertise in both FEM and nuclear science to use the codes effectively.

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