def testAtten(self):
print("\n========= INITIATING MULT REGION BEAM TEST ==========")
sNord = 18
# define fixed source boundary cond
srcStrength = 1.e6 # [n / cm**2-s]
# energy distribution of source (all born at 0.1MeV
srcEnergy = np.array([1.0, 0, 0.0, 0, 0, 0, 0, 0, 0, 0])
#
# ## REGION 1 - GRAPHITE ###
width1, dX1 = 25.0, 1.0
region1Mat = mx.mixedMat({'c12': 1.0})
region1Mat.setDensity(1.96)
region1mesh1D = sn.Mesh1Dsn([0, width1], dX1, region1Mat, sN=sNord)
bcs1 = {0: {'fixN': (1, [srcStrength, srcEnergy])}}
region1mesh1D.setBCs(bcs1)
# ## REGION 2 - BORATED CARBON ###
width2, dX2 = 25.0, 0.05
region2Mat = mx.mixedMat({'c12': 0.99, 'b10': 0.01})
region2Mat.setDensity(1.9)
region2mesh1D = sn.Mesh1Dsn([width1 + dX1 / 2. + dX2 / 2., width1 + dX1 / 2. + dX2 / 2. + width2], dX2, region2Mat, sN=sNord)
bcs2 = {-1: {'vac': (2, 0)}}
region2mesh1D.setBCs(bcs2)
#
# ## BUILD DOMAIN ###
domain = sn.SubDomain()
domain.addRegion(region1mesh1D)
domain.addRegion(region2mesh1D)
domain.buildSweepTree()
#
# ## SWEEP DOMAIN ###
for si in range(180):
resid = domain.sweepSubDomain(1)
if resid < 1e-5:
break
scalarFlux = domain.getScalarFlux()
for g in range(len(srcEnergy)):
pass
flxPlt.plotFluxE(scalarFlux[-1][::-1]) # flux vs E at left edge
centroids = [cell.centroid for cell in domain.regions[0].cells]
centroids += [cell.centroid for cell in domain.regions[1].cells]
for g in range(len(srcEnergy)):
sfp.plot1DScalarFlux(scalarFlux[:][:, g], centroids, label='Group ' + str(g + 1))
# sfp.plot1DNeutronND(scalarFlux[:][:, g], centroids, g)
# plot ord fluxes at leading edge
ordFlux = domain.getOrdFlux()
angles = np.arccos(domain.regions[0].cells[0].sNmu)
g = 2
mag = ordFlux[1][g, 0, :] / sum(ordFlux[1][g, 0, :])
pof.compass(angles, mag, figName='polar_grp3')
# plot ord fluxes at mid plane
g = 3
mag = ordFlux[1][g, 0, :] / sum(ordFlux[1][g, 0, :])
pof.compass(angles, mag, figName='polar_grp4')
def testAtten(self):
print("\n========= INITIATING BEAM TEST ==========")
width, dX = 50.0, 0.4
sNord = 8
attnMat = mx.mixedMat({'c12': 1.0})
attnMat.setDensity(2.24)
print(attnMat.nDdict)
mesh1D = sn.Mesh1Dsn([0, width], dX, attnMat, sN=sNord)
# define fixed boundary cond
srcStrength = 1.e6 # [n / cm**2-s]
# energy distribution of source (all born at 0.1MeV
srcEnergy = np.array([1.0, 0, 0.0, 0, 0, 0, 0, 0, 0, 0])
bcs = {0: {'fixN': (1, [srcStrength, srcEnergy])},
-1: {'vac': (2, 0)}}
mesh1D.setBCs(bcs)
for si in range(1):
resid = mesh1D.sweepMesh(1)
if resid < 1e-5:
break
scalarFlux = mesh1D.getScalarFlux()
for g in range(len(srcEnergy)):
sfp.plot1DScalarFlux(scalarFlux[:][:, g], np.arange(0, width, dX), label='Group ' + str(g + 1))
sfp.plot1DNeutronND(scalarFlux[:][:, g], np.arange(0, width, dX), g)
flxPlt.plotFluxE(scalarFlux[-1][::-1]) # flux vs E at left edge
# plot ord fluxes at leading edge
ordFlux = mesh1D.getOrdFlux()
angles = np.arccos(mesh1D.cells[0].sNmu)
g = 2
mag = ordFlux[1][g, 0, :] / sum(ordFlux[1][g, 0, :])
pof.compass(angles, mag, figName='polar_grp3')
# plot ord fluxes at mid plane
g = 3
mag = ordFlux[1][g, 0, :] / sum(ordFlux[1][g, 0, :])
pof.compass(angles, mag, figName='polar_grp4')
def testSSheild(self):
testMat = mx.mixedMat({'fe56': 0.5, 'u235': 0.5})
testMat.setDensity(10.0)
#testMat._computeBackgroundXsec()
ssTestMat = testMat.selfSheild()
#print("Ffactors for fe56")
#print(testMat.microDat['fe56']['f'])
#print("Ffactors for u235")
#print(testMat.microDat['u235']['f'])
print("Self-sheilded Macro cross sections [1/cm] for fe56, u235 mix:")
print(ssTestMat.macroProp['Ntotal'])
print("Inf Dilute cross sections [1/cm] for fe56, u235 mix:")
print(testMat.macroProp['Ntotal'])
def testSSheild(self):
testMat = mx.mixedMat({'fe56': 0.5, 'u235': 0.5})
testMat.setDensity(10.0)
#testMat._computeBackgroundXsec()
ssTestMat = testMat.selfSheild()
#print("Ffactors for fe56")
#print(testMat.microDat['fe56']['f'])
#print("Ffactors for u235")
#print(testMat.microDat['u235']['f'])
print("Self-sheilded Macro cross sections [1/cm] for fe56, u235 mix:")
print(ssTestMat.macroProp['Ntotal'])
print("Inf Dilute cross sections [1/cm] for fe56, u235 mix:")
print(testMat.macroProp['Ntotal'])
def testXSplot(self):
""" Test ability to read XS file, and
plot xs at multiple dilutions.
"""
feMat = mx.mixedMat({'fe56': 1.0})
feMat.setDensity(8.0)
ffactors = feMat.microDat['fe56']['ffactor']
totxs = feMat.microDat['fe56']['total']
# plot at infinite dilution
xsplt.xsPlot(totxs[::-1], label='Fe56 inf dilution')
# plot at 10e-1 dilution
totxs_ssheild = totxs * ffactors[:, 5]
xsplt.xsPlot(totxs_ssheild[::-1], label='Fe56 10e-1 dilution', style='--')
# Verify thermal XS is close to true val
xsAt00253ev = 14.96
print("Thermal XS diff: " + str(xsAt00253ev - totxs_ssheild[-2]) + " [b]")
xsplt.xsPlot(np.ones(10) * xsAt00253ev, label='XS at 0.0253eV [KAERI]')
def __init__(self, inputDict):
# specify sub-domain extents. For serial implementation, one sub-domain
# is sufficient as all mesh-material regions will belong to the same CPU
self.subDomains
self.dim = inputDict.pop("dim", 1)
#
# specify mesh-material region extents and materials
# as key val pairs
defaultMat = mx.mixedMat({'u235': 0.1, 'h1': 0.6, 'o16': 0.3})
defaultMat.setDensity(1.0)
self.matRegions.pop("matRegions", {'glob1': ([0, 10], 0.01, defaultMat)})
#
# specify sN order. Provide pre-computed quadrature, allow user defined
# quadrature sets as well.
self.sNord = inputDict.pop("sNorder", 2) # S2 by default
#
# specify material xsdir (xs folder), default to default mat dir
self.xsdir = inputDict.pop("xsdir", "./materials/hw2")
def testXSplot(self):
""" Test ability to read XS file, and
plot xs at multiple dilutions.
"""
feMat = mx.mixedMat({'fe56': 1.0})
feMat.setDensity(8.0)
ffactors = feMat.microDat['fe56']['ffactor']
totxs = feMat.microDat['fe56']['total']
# plot at infinite dilution
xsplt.xsPlot(totxs[::-1], label='Fe56 inf dilution')
# plot at 10e-1 dilution
totxs_ssheild = totxs * ffactors[:, 5]
xsplt.xsPlot(totxs_ssheild[::-1],
label='Fe56 10e-1 dilution',
style='--')
# Verify thermal XS is close to true val
xsAt00253ev = 14.96
print("Thermal XS diff: " + str(xsAt00253ev - totxs_ssheild[-2]) +
" [b]")
xsplt.xsPlot(np.ones(10) * xsAt00253ev, label='XS at 0.0253eV [KAERI]')
def testAtten(self):
print("\n========= INITIATING BEAM TEST ==========")
width, dX = 50.0, 0.4
sNord = 8
attnMat = mx.mixedMat({'c12': 1.0})
attnMat.setDensity(2.24)
print(attnMat.nDdict)
mesh1D = sn.Mesh1Dsn([0, width], dX, attnMat, sN=sNord)
# define fixed boundary cond
srcStrength = 1.e6 # [n / cm**2-s]
# energy distribution of source (all born at 0.1MeV
srcEnergy = np.array([1.0, 0, 0.0, 0, 0, 0, 0, 0, 0, 0])
bcs = {0: {'fixN': (1, [srcStrength, srcEnergy])}, -1: {'vac': (2, 0)}}
mesh1D.setBCs(bcs)
for si in range(1):
resid = mesh1D.sweepMesh(1)
if resid < 1e-5:
break
scalarFlux = mesh1D.getScalarFlux()
for g in range(len(srcEnergy)):
sfp.plot1DScalarFlux(scalarFlux[:][:, g],
np.arange(0, width, dX),
label='Group ' + str(g + 1))
sfp.plot1DNeutronND(scalarFlux[:][:, g], np.arange(0, width, dX),
g)
flxPlt.plotFluxE(scalarFlux[-1][::-1]) # flux vs E at left edge
# plot ord fluxes at leading edge
ordFlux = mesh1D.getOrdFlux()
angles = np.arccos(mesh1D.cells[0].sNmu)
g = 2
mag = ordFlux[1][g, 0, :] / sum(ordFlux[1][g, 0, :])
pof.compass(angles, mag, figName='polar_grp3')
# plot ord fluxes at mid plane
g = 3
mag = ordFlux[1][g, 0, :] / sum(ordFlux[1][g, 0, :])
pof.compass(angles, mag, figName='polar_grp4')
totProd = 1e10 * 2 * 3 # (n/s-cm^3) * (cm) -> n/s-cm^2
# fraction out left and right face
lfl = leftGrpCurrent / totProd
rfl = rightGrpCurrent / totProd
print("Fraction of source neutrons leaking left= " + str(lfl))
print("Fraction of source neutrons leaking right= " + str(rfl))
# non leakage prob
nlp = 1 - (leftGrpCurrent + rightGrpCurrent) / totProd
print("Non Leakage Probability= " + str(nlp))
return nlp
if __name__ == "__main__":
borMult = np.logspace(-2.5, 0, 10)
# ## MATERIAL DEFS ##
modMat = mx.mixedMat({'h1': 3.35e22 / 1e24, 'o16': 1.67e22 / 1e24})
borMat = mx.mixedMat({'h1': 3.35e22 / 1e24, 'o16': 1.67e22 / 1e24, 'b10': 2.e21 / 1e24})
# ## ABSORBER REGION WIDTHS AND POSITIONS ##
widths = genZoneWidths([5, 10, 15], [2, 2, 2], 20)
print(widths)
# Explicit geom run
testSlab(widths, modMat, borMat)
# Homogenized geom run
#homogenized(widths, modMat, borMat)
#results = []
#for mult in borMult:
# modMat = mx.mixedMat({'h1': 3.35e22 / 1e24, 'o16': 1.67e22 / 1e24})
# borMat = mx.mixedMat({'h1': 3.35e22 / 1e24, 'o16': 1.67e22 / 1e24, 'b10': mult * 2.e21 / 1e24})
# nlpE, pi1 = testSlab(widths, modMat, borMat)
# nlpH = homogenized(widths, modMat, borMat)
# results.append([pi1, nlpH, nlpE, (nlpH - nlpE) / nlpE])