From 9f59e6642d526a7a545ad366e4ce5500ecda9504 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sigfrid=20Stj=C3=A4rnholm?= <sigfrid@stjarnholm.com>
Date: Sat, 17 Feb 2024 20:43:00 +0100
Subject: [PATCH] Set OpenMCOperator materials to the model materials when
 diff_burnable_mats = True

---
 openmc/deplete/openmc_operator.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/openmc/deplete/openmc_operator.py b/openmc/deplete/openmc_operator.py
index ad7a3924b7e..75f0925c4e7 100644
--- a/openmc/deplete/openmc_operator.py
+++ b/openmc/deplete/openmc_operator.py
@@ -142,6 +142,7 @@ def __init__(
 
         if diff_burnable_mats:
             self._differentiate_burnable_mats()
+            self.materials = self.model.materials
 
         # Determine which nuclides have cross section data
         # This nuclides variables contains every nuclides