Nick Touran

Expose the CoordinateLocator capabilities to blueprints, and make tests

1

The `grids` system has a [CoordinateLocation](https://github.com/terrapower/armi/blob/3f834e0c10ffeef677c57ca663a2ce816a4b54f5/armi/reactor/grids.py#L491) that is used as the anchor of grids, but is intended to also allow arbitrary placement of objects at arbitrary coordinates. We need an...

Allow components to have children in support of particle fuel modeling

17

## Description This changes the ARMI data model to allow components to have children. It also adds a input capability to allow users to input particle type fuel (e.g. TRISO)....

split out nucDirectory and nuclearDataIO as two separate repositories

1

The ARMI nuclide directory and nuclearDataIO subpackages are relatively generic. The latter depends on the former, but not much else in the armi ecosystem, though the ARMI ecosystem uses them...

Give all ArmiObjects shape; change Blocks and Components to have shapes rather than be shapes

4

In discussion in #503, we came up with a need for a Composite containing a blend of a graphite matrix with a number of TRISO ComponentGroups. In order to do...

Make plotting routines mostly traffic in figure objects

1

We have some plotting convenience functions that are great but tend to be overparameterized due to the variety of plots people often want. It may make sense to make them...

Make standard way to represent TRISO fuel

5

[TRISO fuel ](https://en.wikipedia.org/wiki/Nuclear_fuel#TRISO_fuel) is a common need and it'd be nice if there were an obvious straightforward way to define it and use it in reactor models (e.g. #224). Let's...

Allow components to be input outside of a block in blueprints

2

For lots of reasons (e.g. [this discussion](https://github.com/terrapower/armi/discussions/503)), we'd like to be able to define components in a components: root level in the blueprints rather than just inside blocks. :warning: This...

Make plugin for MIT's OpenMC

1

We could benefit from a plugin connecting ARMI to MIT's OpenMC code. The [pincell example shows ](https://docs.openmc.org/en/stable/examples/pincell.html) that the whole case can be defined and run from the Python API...

harmonize physics kernel selection and activation settings

1

He have framework-level user settings that can select physics kernels and activate them. They are a bit of a hodgepodge. Examples: * `neutronicsKernel` selects which global flux system to use...

Create ARMI inputs for MHTGR-350 Benchmark

2

In #223 we discussed how to model something similar to the MHTGR-350 described in [this benchmark document](https://art.inl.gov/NGNP/Water%20Ingress%20Assessment%20Review%20Material/INL%20Published%20Material/Preliminary%20Prismatic%20Coupled%20Neutronics%20Thermal%20Fluids%20Transient%20Benchmark%20of%20the%20MHTGR-350%20MW%20Core%20Design%2012-06-10.pdf). It would be nice to start building inputs representing this core as a...