diff --git a/xsgen/brightlite.py b/xsgen/brightlite.py
index 7c10583..76c9955 100644
--- a/xsgen/brightlite.py
+++ b/xsgen/brightlite.py
@@ -42,12 +42,12 @@ def write(self, libs, dirname):
                 for temp_nuc in matlib['material'][i].comp:
                     nuc_name = str(nucname.name(temp_nuc))
                     try:
-                        trans_matrix[nuc_name].append(matlib['material'][i].comp[temp_nuc])
+                        trans_matrix[nuc_name].append(matlib['material'][i].comp[temp_nuc]*1000)
                     except KeyError:
                         if matlib['material'][i].comp[temp_nuc] > self.rc.track_nuc_threshold:
                             zero_array = [0]*i
                             trans_matrix[nuc_name] = zero_array
-                            trans_matrix[nuc_name].append(matlib['material'][i].comp[temp_nuc])
+                            trans_matrix[nuc_name].append(matlib['material'][i].comp[temp_nuc]*1000)
                 i+=1
             nucs = matlib["tracked_nucs"]
             lines.extend(sorted([n + "   " + "   ".
@@ -82,5 +82,6 @@ def write(self, libs, dirname):
                         for n, f in self.rc.clad_material.comp.items()]
             f.write("\n".join(cladrows))
             f.write("\n")
+        #for tape9 in self.libs['tape9']:
         shutil.copyfile("TAPE9.INP", os.path.join(dirname, "TAPE9.INP"))
 
diff --git a/xsgen/openmc_origen.py b/xsgen/openmc_origen.py
index 80bb257..b009ec5 100644
--- a/xsgen/openmc_origen.py
+++ b/xsgen/openmc_origen.py
@@ -22,6 +22,7 @@
 
 from xsgen.utils import indir, NotSpecified
 from xsgen.tape9 import brightlitetape9
+from pyne.xs import models
 
 # templates are from openmc/examples/lattice/simple
 
@@ -122,6 +123,13 @@
     <scores>scatter</scores>
     <nuclides>total</nuclides>
   </tally>
+  <tally id="5">
+    <label>fission</label>
+    <filter type="energy" bins="{_omcds_egrid}" />
+    <filter type="material" bins="1" />    
+    <nuclides>U-235</nuclides>
+    <scores>total nu-scatter fission</scores>
+  </tally>
 </tallies>
 """
 
@@ -225,7 +233,7 @@ def generate_run(self, run):
         libs : list of dicts
             Libraries to write out - one for the full fuel and one for each tracked nuclide.
         """
-        self.libs = {'xs': [], 'phi_g': {
+        self.libs = {'xs': [], 'tape9': [], 'phi_g': {
             'E_g': {'EAF': self.eafds.src_group_struct,
                     'OpenMC': self.omcds.src_group_struct},
             'phi_g': []}, 
@@ -380,10 +388,16 @@ def run_all_the_origens(self, state, transmute_time, phi_tot, results):
         """
         if self.rc.verbose:
             print("making tape9 for {0} with phi={1}".format(state, phi_tot))
+        self.libs['fuel']['material'][-1].density = 10.7
+        self.libs['fuel']['material'][-1].atoms_per_molecule = 3.0
+        num_den = self.libs['fuel']['material'][-1].to_atom_frac()
+        for ds in self.xscache.data_sources:
+            ds.shield_weights(num_den, self.rc.temperature)
         self.tape9 = origen22.make_tape9(self.rc.track_nucs, self.xscache, nlb=(219, 220, 221))
         self.tape9 = origen22.merge_tape9((self.tape9,
                                           origen22.loads_tape9(brightlitetape9)))
         origen22.write_tape9(self.tape9)
+        self.libs['tape9'].append(self.tape9)
         for mat_id in results.keys():
             pwd = self.pwd(state, "origen{}".format(mat_id))
             mat = self.libs[mat_id]["material"][-1]
diff --git a/xsgen/pre.py b/xsgen/pre.py
index d868db4..2afa21d 100644
--- a/xsgen/pre.py
+++ b/xsgen/pre.py
@@ -315,13 +315,14 @@ def _ensure_mats(self, rc):
         if 'cool_material' in rc:
             rc.cool_material = ensure_mat(rc.cool_material)
         else:
-            MW = (2 * 1.0) + (1 * 16.0) + (0.199 * 550 * 10.0**-6 * 10.0) + \
-                                          (0.801 * 550 * 10.0**-6 * 11.0)
+            #MW = (2 * 1.0) + (1 * 16.0) + (0.199 * 550 * 10.0**-6 * 10.0) + \
+            #                              (0.801 * 550 * 10.0**-6 * 11.0)
+            MW = 18
             rc.cool_material = Material({
                 10010: (2 * 1.0) / MW,
                 80160: (1 * 16.0) / MW,
-                50100: (0.199 * 550 * 10.0**-6 * 10.0) / MW,
-                50110: (0.801 * 550 * 10.0**-6 * 11.0) / MW,
+                #50100: (0.199 * 550 * 10.0**-6 * 10.0) / MW,
+                #50110: (0.801 * 550 * 10.0**-6 * 11.0) / MW,
                 })
 
     def _ensure_lattice(self, rc):