crp/OpenMC
1
0
Fork 0
mirror of https://github.com/openmc-dev/openmc.git synced 2026-07-27 13:45:36 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

When reconstructing resonances, add energies at half-height

Browse source
This commit is contained in:
Paul Romano 2017-03-24 14:53:25 -05:00
parent 6f4fb29d65
commit f49e0f9cf1
1 changed files with 26 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

36
openmc/data/neutron.py
View file

@ -2,6 +2,7 @@ from __future__ import division, unicode_literals
import sys
from collections import OrderedDict, Iterable, Mapping, MutableMapping
from itertools import chain
from functools import reduce
from math import log10
from numbers import Integral, Real
from warnings import warn
@ -19,7 +20,7 @@ from .function import Tabulated1D, Sum, ResonancesWithBackground
from .grid import linearize, thin
from .product import Product
from .reaction import Reaction, _get_photon_products_ace
from .resonance import RMatrixLimited, Unresolved, Resonances, _RESOLVED
from . import resonance as res
from .urr import ProbabilityTables
import openmc.checkvalue as cv
from openmc.mixin import EqualityMixin
@ -280,7 +281,7 @@ class IncidentNeutron(EqualityMixin):
@resonances.setter
def resonances(self, resonances):
cv.check_type('resonances', resonances, Resonances)
cv.check_type('resonances', resonances, res.Resonances)
self._resonances = resonances
@summed_reactions.setter
@ -373,17 +374,32 @@ class IncidentNeutron(EqualityMixin):
x = []
y = []
for rr in data.resonances:
if isinstance(rr, RMatrixLimited):
if isinstance(rr, res.RMatrixLimited):
raise TypeError('R-Matrix Limited not supported.')
elif isinstance(rr, Unresolved):
elif isinstance(rr, res.Unresolved):
continue
# Create 1000 equal log-spaced energies over RRR
# Get energies/widths for resonances
e_peak = rr.parameters['energy'].values
if isinstance(rr, res.MultiLevelBreitWigner):
width = rr.parameters['totalWidth'].values
elif isinstance(rr, res.ReichMoore):
df = rr.parameters
width = (df['neutronWidth'] + df['captureWidth'] +
df['fissionWidthA'] + df['fissionWidthB']).values
# Determine energies at half-height
e_min, e_max = rr.energy_min, rr.energy_max
in_range = (e_peak > e_min) & (e_peak < e_max)
e_peak = e_peak[in_range]
e_half_left = e_peak - width[in_range]/2
e_half_right = e_peak + width[in_range]/2
# Create 1000 equal log-spaced energies over RRR, combine with
# resonance peaks and half-height energies
e_log = np.logspace(log10(e_min), log10(e_max), 1000)
e_res = rr.parameters['energy'].values
in_range = (e_res > e_min) & (e_res < e_max)
energies = np.union1d(e_log, e_res[in_range])
energies = reduce(np.union1d, (e_log, e_peak, e_half_left,
e_half_right))
# Linearize and thin cross section
xi, yi = linearize(energies, data[2].xs['0K'])
@ -742,7 +758,7 @@ class IncidentNeutron(EqualityMixin):
atomic_weight_ratio, temperature)
if (2, 151) in ev.section:
data.resonances = Resonances.from_endf(ev)
data.resonances = res.Resonances.from_endf(ev)
# Read each reaction
for mf, mt, nc, mod in ev.reaction_list:
@ -751,7 +767,7 @@ class IncidentNeutron(EqualityMixin):
# Replace cross sections for elastic, capture, fission
try:
if any(isinstance(r, _RESOLVED) for r in data.resonances):
if any(isinstance(r, res._RESOLVED) for r in data.resonances):
for mt in (2, 102, 18):
if mt in data.reactions:
rx = data.reactions[mt]