diff --git a/armi/reactor/assemblyParameters.py b/armi/reactor/assemblyParameters.py
index 7b8fa99d3..42bcee1c2 100644
--- a/armi/reactor/assemblyParameters.py
+++ b/armi/reactor/assemblyParameters.py
@@ -72,25 +72,33 @@ def powerDecay(self, value):
         pb.defParam(
             "chargeBu",
             units="%FIMA",
-            description="Max block-average burnup in this assembly when it entered the core.",
+            description="Max block-average burnup in this assembly when it most recently"
+            " entered the core. If the assembly was discharged and then re-charged,"
+            " this value will only reflect the most recent charge.",
         )
 
         pb.defParam(
             "chargeCycle",
             units="",
-            description="Cycle number that this assembly entered the core.",
+            description="Cycle number that this assembly most recently entered the core."
+            " If the assembly was discharged and then re-charged, this value will only"
+            " reflect the most recent charge.",
         )
 
         pb.defParam(
             "chargeFis",
             units="kg",
-            description="Fissile mass in assembly when it entered the core.",
+            description="Fissile mass in assembly when it most recently entered the core."
+            " If the assembly was discharged and then re-charged, this value will only"
+            " reflect the most recent charge.",
         )
 
         pb.defParam(
             "chargeTime",
             units="years",
-            description="Time at which this assembly entered the core.",
+            description="Time at which this assembly most recently entered the core."
+            " If the assembly was discharged and then re-charged, this value will only"
+            " reflect the most recent charge.",
             default=parameters.NoDefault,
         )