armi.nuclearDataIO.cccc.fixsrc module¶

FIXSRC is a CCCC standard data file for storing multigroup fixed sources on a triangular mesh.

Currently, the FIXSRC writing capability assumes a gamma (not neutron) fixed source problem. This enables photon transport problems. [CCCC-IV]

armi.nuclearDataIO.cccc.fixsrc.readBinary(fileName)[source]¶: Read a binary FIXSRC file.

armi.nuclearDataIO.cccc.fixsrc.writeBinary(fileName, fixSrcArray)[source]¶: Write fixed source data to a FIXSRC file.

class armi.nuclearDataIO.cccc.fixsrc.FIXSRC(fileName, fileMode, fixSrc)[source]¶

Bases: armi.nuclearDataIO.cccc.cccc.Stream

Read or write a binary FIXSRC file from DIF3D fixed source input.

Initialize a gamma FIXSRC class for reading or writing a binary FIXSRC file for DIF3D gamma fixed source input. If the intent is to write a gamma FIXSRC file, the variable FIXSRC.fixSrc, which contains to-be-written core-wide multigroup gamma fixed source data, is constructed from an existing neutron RTFLUX file.

Parameters

fileName (str, optional) – The file name of the RTFLUX/ATFLUX binary file to be read.
fileMode (str, optional) – If ‘wb’, this class writes a FIXSRC binary file. If ‘rb’, this class reads a preexisting FIXSRC binary file.
o (Operator object, optional) – If fileMode=’wb’, an ARMI operator must be specified in order to construct gamma fixed source data from a neutron RTFLUX file (requires reactor geometry and settings).

readWrite()[source]¶: Read or write a binary FIXSRC file for DIF3D fixed source input.