task: metadata: install: pip install -e .[test]
patch: diff --git a/armi/reactor/blueprints/reactorBlueprint.py b/armi/reactor/blueprints/reactorBlueprint.py
index eb51ea3d..a1481c36 100644
--- a/armi/reactor/blueprints/reactorBlueprint.py
+++ b/armi/reactor/blueprints/reactorBlueprint.py
@@ -144,7 +144,7 @@ class SystemBlueprint(yamlize.Object):
         """
         from armi.reactor import reactors  # avoid circular import
 
-        runLog.info("Constructing the `{}`".format(self.name))
+        runLog.info(f"Constructing the `{self.name}`")
 
         if geom is not None and self.name == "core":
             gridDesign = geom.toGridBlueprints("core")[0]
@@ -196,9 +196,7 @@ class SystemBlueprint(yamlize.Object):
         return system
 
     def _loadAssemblies(self, cs, container, gridContents, bp):
-        runLog.header(
-            "=========== Adding Assemblies to {} ===========".format(container)
-        )
+        runLog.header(f"=========== Adding Assemblies to {container} ===========")
         badLocations = set()
         for locationInfo, aTypeID in gridContents.items():
             newAssembly = bp.constructAssem(cs, specifier=aTypeID)
@@ -232,9 +230,7 @@ class SystemBlueprint(yamlize.Object):
         # (unless specified on input)
         if not gridDesign.latticeDimensions:
             runLog.info(
-                "Updating spatial grid pitch data for {} geometry".format(
-                    container.geomType
-                )
+                f"Updating spatial grid pitch data for {container.geomType} geometry"
             )
             if container.geomType == geometry.GeomType.HEX:
                 container.spatialGrid.changePitch(container[0][0].getPitch())
@@ -258,26 +254,21 @@ def summarizeMaterialData(container):
         Any Core object with Blocks and Components defined.
     """
     runLog.header(
-        "=========== Summarizing Source of Material Data for {} ===========".format(
-            container
-        )
+        f"=========== Summarizing Source of Material Data for {container} ==========="
     )
     materialNames = set()
     materialData = []
     for c in container.iterComponents():
         if c.material.name in materialNames:
             continue
-        materialData.append((c.material.name, c.material.DATA_SOURCE, False))
+        materialData.append((c.material.name, c.material.DATA_SOURCE))
         materialNames.add(c.material.name)
+
     materialData = sorted(materialData)
     runLog.info(
         tabulate.tabulate(
             data=materialData,
-            headers=[
-                "Material Name",
-                "Source Location",
-                "Property Data was Modified\nfrom the Source?",
-            ],
+            headers=["Material Name", "Source Location"],
             tableFmt="armi",
         )
     )
diff --git a/doc/release/0.4.rst b/doc/release/0.4.rst
index cda3e8ff..d2374817 100644
--- a/doc/release/0.4.rst
+++ b/doc/release/0.4.rst
@@ -41,6 +41,7 @@ Bug Fixes
 #. Rotate hexagonal assembly patches correctly on facemap plots. (`PR#1883 <https://github.com/terrapower/armi/pull/1883>`_)
 #. Update height of fluid components after axial expansion (`PR#1828 <https://github.com/terrapower/armi/pull/1828>`_)
 #. Material theoretical density is serialized to and read from database. (`PR#1852 <https://github.com/terrapower/armi/pull/1852>`_)
+#. Removed broken and unused column in ``summarizeMaterialData``. (`PR#1925 <https://github.com/terrapower/armi/pull/1925>`_)
 #. TBD
 
 Quality Work

problem_statement: "Property Data was Modified from the Source?"
During a run, ARMI spits out a table into the stdout that looks like this:
![image](https://user-images.githubusercontent.com/21959600/220784265-8d8552ca-8e6b-420f-a293-fad31f8edaa9.png)

I don't usually think about this, but it caught my eye because all of the columns in the table say `False`, but I am FOR SURE modifying the source data in my current run.

So I dug into this a bit deeper. This is where that table is generated:
https://github.com/terrapower/armi/blob/3e47ec6e6359870866502c9356747cf1da4f9515/armi/reactor/blueprints/reactorBlueprint.py#L256-L272

It looks like the value is _always_ set to `False`. So really the output there is a lie.

So do we want to fix this, or just get rid of it completely?
repo: terrapower/armi
test_cmd: pytest --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning
test_patch: diff --git a/armi/reactor/blueprints/tests/test_reactorBlueprints.py b/armi/reactor/blueprints/tests/test_reactorBlueprints.py
index c50645c5..f7d5f618 100644
--- a/armi/reactor/blueprints/tests/test_reactorBlueprints.py
+++ b/armi/reactor/blueprints/tests/test_reactorBlueprints.py
@@ -122,11 +122,7 @@ class TestReactorBlueprints(unittest.TestCase):
 
     def test_materialDataSummary(self):
         """Test that the material data summary for the core is valid as a printout to the stdout."""
-        expectedMaterialData = [
-            ("Custom", "ARMI", False),
-            ("HT9", "ARMI", False),
-            ("UZr", "ARMI", False),
-        ]
+        expectedMaterialData = [("Custom", "ARMI"), ("HT9", "ARMI"), ("UZr", "ARMI")]
         core, _sfp = self._setupReactor()
         materialData = reactorBlueprint.summarizeMaterialData(core)
         for actual, expected in zip(materialData, expectedMaterialData):