From da4de9c4df7216a776849dd581429a95f01e4a28 Mon Sep 17 00:00:00 2001
From: Adam Nelson <nelsonag@umich.edu>
Date: Tue, 23 Feb 2016 20:43:47 -0500
Subject: [PATCH] Now check nu_fission data in mgxs_library python api when
 determining if dataset is fissionable or not.

---
 openmc/mgxs_library.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/openmc/mgxs_library.py b/openmc/mgxs_library.py
index b6dd9f09fe..06b369c68a 100644
--- a/openmc/mgxs_library.py
+++ b/openmc/mgxs_library.py
@@ -487,6 +487,8 @@ class XSdata(object):
         # check we have a numpy list
         check_type("nu_fission", nu_fission, np.ndarray, expected_iter_type=Real)
         self._nu_fission = np.copy(nu_fission)
+        if np.sum(self._nu_fission) > 0.0:
+            self._fissionable = True
 
     def _get_xsdata_xml(self):
         element = ET.Element("xsdata")