Fix for dnb for transients (fc16c5d7) · Commits · Gurecky, William / SubKit

SubKit/build/Model.py

+29 −9

Original line number	Diff line number	Diff line
		@@ -111,9 +111,10 @@ class Model:
		}

		me.conductorOptions = {'nc': 1, # 1-D conduction
		'chfModel': -1, # CHF model disabled
		'postChfCheck': 0 # Do not check CHF at the end of the simulation
		'chfModel': 'none', # CHF model disabled
		'postChfCheck': 'w3' # Check CHF at end of each edit
		}
		me.conductorOptionsSet = {'nc': False, 'chfModel': False, 'postChfCheck': False}

		# Parallel model information
		me.channelsInDomain = {}
		@@ -709,23 +710,34 @@ class Model:
		- 1 for radial conduction only
		- 2 for radial and azimuthal conduction only
		- 3 for radial, azimuthal, and axial conduction
		chfModel (int): Set to:
		- -1 for no post-CHF heat transfer (always use pre-CHF models)
		- 0 for Biasi
		- 1 for W-3
		postChfCheck (bool): Same options as chfModel. Meant to be used when the chfModel is disabled.
		chfModel (str): Set to:
		- "none"
		- "biasi"
		- "w3"
		- "groeneveld"
		postChfCheck (str): Same options as chfModel. Meant to be used when the chfModel is disabled.
		The code cannot go into post-CHF, but the CHF model will still be used to calculate DNBR at the
		end of the simulation.

		"""
		if nc:
		me.conductorOptions['nc'] = nc
		me.conductorOptionsSet['nc'] = True

		valid = ['none', 'w3', 'biasi', 'groeneveld']

		if chfModel:
		if chfModel not in valid:
		raise ValueError("The selected CHF model: "+str(chfModel)+" is not valid")
		me.conductorOptions['chfModel'] = chfModel
		me.conductorOptionsSet['chfModel'] = True

		if postChfCheck:
		if postChfCheck not in valid:
		raise ValueError("The selected CHF model: "+str(postChfCheck)+" is not valid")
		me.conductorOptions['postChfCheck'] = postChfCheck
		me.conductorOptionsSet['postChfCheck'] = True


		def setEditOptions(me, chanVTK=None, rodVTK=None, ctfHDF5=None, veracsHDF5=None, chanASCII=None,
		rodEdits=None, dnbEdits=None):
		@@ -1121,6 +1133,8 @@ class Model:
		assert('undefined_default_uniform' in me.axialPowerShapeAxial[0.0])
		me.solidObjects[pinID].powID = 'undefined_default_uniform'

		me._chfChecks()

		def _inferInitialConditionsFromBC(me):
		""" If the IC can be inferred from the channel boundary conditions that will be set, returns
		initial mass flow rate, temperature, and pressure. If not, returns None."""
		@@ -1194,6 +1208,12 @@ class Model:
		raise RuntimeError("Attempting to apply boundary condition to undefined channel:"+str(chID))
		me.sections[secID].channels[chID].addBC(bc, level)

		def _chfChecks(me):
		if not me.runSteadyState and me.conductorOptions['postChfCheck']!='none':
		if me.conductorOptionsSet['postChfCheck']:
		warnings.warn("Cannot use post CHF checks when running a transient. The CHF model will be turned on with the same option instead.")
		me.conductorOptions['chfModel'] = me.conductorOptions['postChfCheck']
		me.conductorOptions['postChfCheck']='none'

		class Gap(object):
		""" Defines a gap (a lateral connection between two channels in the same axial section)

SubKit/build/genDeck.py

+17 −1

Original line number	Diff line number	Diff line
		@@ -270,7 +270,23 @@ def writeDeck(model):
		group8Data.append(" 8 \n")
		group8Data.append("*Card 8.1 \n")
		group8Data.append("** NRRD NSRD NC NRTB NRAD NLTY NSTA NXF NCAN RADF W3 IHTC DNBCHK NDM14 \n")
		group8Data.append("{:7d}{:8d}{:6d} 1 0 0 1 1 0 0{:6d} 1{:6d} 0 \n".format(len(heated), len(unheated), model.conductorOptions['nc'], model.conductorOptions['chfModel'], model.conductorOptions['postChfCheck']))
		if model.conductorOptions['chfModel']=='none':
		w3 = -1
		elif model.conductorOptions['chfModel']=='biasi':
		w3 = 0
		elif model.conductorOptions['chfModel']=='w3':
		w3 = 1
		elif model.conductorOptions['chfModel']=='groeneveld':
		w3 = 3
		if model.conductorOptions['postChfCheck']=='none':
		dnbchk = -1
		elif model.conductorOptions['postChfCheck']=='biasi':
		dnbchk = 0
		elif model.conductorOptions['postChfCheck']=='w3':
		dnbchk = 1
		elif model.conductorOptions['postChfCheck']=='groeneveld':
		dnbchk = 3
		group8Data.append("{:7d}{:8d}{:6d} 1 0 0 1 1 0 0{:6d} 1{:6d} 0 \n".format(len(heated), len(unheated), model.conductorOptions['nc'], w3, dnbchk))

		# If this is a parallel model write data
		if model.rodsInDomain:

SubKit/process/SummaryTools.py

+15 −9

Original line number	Diff line number	Diff line
		@@ -32,18 +32,24 @@ class SummaryTools(object):
		else:
		_fname = fname
		f = open(_fname, 'w')
		f.write(" \|========== operating conditions ===============\|====== critical location =======\|=============== hot channel conditions ===================\|=======\|\n")
		f.write(" \| system \| inlet \| inlet \| average \| \| hot \| hot \| axial \| mass flux \| \| heat flux \| CHF \| \|\n")
		f.write(" \| pressure \| temp. \| mass flux \| heat rate \| mdnbr \| channel \| rod \| level \| \| equil. \| \| heat flux \| time \|\n")
		unitsB =" \| (psia) \| (F) \| (Mlbm/hr-ft2) \| (btu/s-ft) \| \| \| \| (in) \| (Mlbm/hr-ft2) \| quality \| (Mbtu/hr-ft2) \| (Mbtu/hr-ft2) \| (sec) \|\n"
		unitsS =" \| (bar) \| (C) \| (kg/m2/s) \| (kW/m) \| \| \| \| (m) \| (kg/m2/s) \| quality \| (kW/m2) \| (kW/m2) \| (sec) \|\n"
		#f.write(" \|========== operating conditions ===============\|====== critical location =======\|=============== hot channel conditions ===================\|=======\|\n")
		#f.write(" \| system \| inlet \| inlet \| average \| \| hot \| hot \| axial \| mass flux \| \| heat flux \| CHF \| \|\n")
		#f.write(" \| pressure \| temp. \| mass flux \| heat rate \| mdnbr \| channel \| rod \| level \| \| equil. \| \| heat flux \| time \|\n")
		#unitsB =" \| (psia) \| (F) \| (Mlbm/hr-ft2) \| (btu/s-ft) \| \| \| \| (in) \| (Mlbm/hr-ft2) \| quality \| (Mbtu/hr-ft2) \| (Mbtu/hr-ft2) \| (sec) \|\n"
		#unitsS =" \| (bar) \| (C) \| (kg/m2/s) \| (kW/m) \| \| \| \| (m) \| (kg/m2/s) \| quality \| (kW/m2) \| (kW/m2) \| (sec) \|\n"
		f.write(" \|====== operating conditions ======\|====== critical location =======\|=============== hot channel conditions ===================\|=======\|\n")
		f.write(" \| system \| inlet \| inlet \| \| hot \| hot \| axial \| mass flux \| \| heat flux \| CHF \| \|\n")
		f.write(" \| pressure \| temp. \| mass flux \| mdnbr \| channel \| rod \| level \| \| equil. \| \| heat flux \| time \|\n")
		unitsB =" \| (psia) \| (F) \| (Mlbm/hr-ft2) \| \| \| \| (in) \| (Mlbm/hr-ft2) \| quality \| (Mbtu/hr-ft2) \| (Mbtu/hr-ft2) \| (sec) \|\n"
		unitsS =" \| (bar) \| (C) \| (kg/m2/s) \| \| \| \| (m) \| (kg/m2/s) \| quality \| (kW/m2) \| (kW/m2) \| (sec) \|\n"
		if _units=="si":
		f.write(unitsS)
		else:
		f.write(unitsB)
		f.write(" \|===============================================\|================================\|==========================================================\|=======\|\n")
		f.write(" \|==================================\|================================\|==========================================================\|=======\|\n")
		for state in range(1, me.h5.getNumState()+1):
		minState, minPin, theta, level, minDNBR = me.h5.getPinWithMinDNBR(state)
		minDNBR = min(minDNBR, 100.0)
		hotChID = me.h5.getConnChan(minPin, level, theta)
		axial, dnbr = me.h5.getPinAxialDNBR(state, minPin, theta)
		sysPressure = me.h5.getAvePressure(state=state)
		@@ -67,12 +73,12 @@ class SummaryTools(object):
		axial, quality = me.h5.getChanEquilibriumQuality(hotChID, state)
		xHot = quality[chLevel]
		axial, q = me.h5.getPinAxialHeatFlux(state, minPin, theta)
		qHot = q[level]
		qHot = max(q[level], 0.0)
		if convert:
		qHot = qHotunit.t_kJ_MBTU/unit.t_s_hr/unit.t_m_ft*2
		if me.h5.isTransient():
		time = me.h5.getTransientTime(state)
		else:
		time = 0.0
		f.write("{:12.3f}{:8.2f}{:16.3f}{:13s}{:8.4f}{:10d}{:6d}{:9.4f}{:16.4e}{:12.4e}{:16.4e}{:16.4e}{:8.4f}\n".format(sysPressure, inletTemp,
		inletMflux, "", minDNBR, hotChID, minPin, location, mfluxHot, xHot, qHot, minDNBR*qHot, time))
		f.write("{:12.3f}{:8.2f}{:16.3f}{:8.3f}{:10d}{:6d}{:9.4f}{:16.4e}{:12.4e}{:16.4e}{:16.4e}{:8.4f}\n".format(sysPressure, inletTemp,
		inletMflux, minDNBR, hotChID, minPin, location, mfluxHot, xHot, qHot, minDNBR*qHot, time))

tests/ctfTraining/nodal_lof/buildDeck.py

+3 −0

Original line number	Diff line number	Diff line
		@@ -196,6 +196,9 @@ def main():
		# If this step is not performed, the core will have a uniform radial and axial power shape.
		builder.setCorePowerShape(radialPower=radPow, axialPower=axPow)

		# The CHF model is disabled by default. Enable it so DNB is calculated
		model.setConductorModelOptions(chfModel="w3")

		# Set the nominal power and direct heating to coolant
		# Without this, the model power will be zero.
		model.setAveragePower(qprime=linearHeatRate, dhfrac=directHeat)

tests/ctfTraining/nodal_lof/deck.inp.gold

+83 −83

Original line number	Diff line number	Diff line
		@@ -17733,7 +17733,7 @@
		8
		*Card 8.1
		** NRRD NSRD NC NRTB NRAD NLTY NSTA NXF NCAN RADF W3 IHTC DNBCHK NDM14
		1544 0 1 1 0 0 1 1 0 0 -1 1 0 0
		1544 0 1 1 0 0 1 1 0 0 1 1 -1 0
		{num_domain} 7
		{domain} 1
		** local_inex global_index owner

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