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.

_rwFileID()[source]

Read file identification information.

_rw1DRecord()[source]

Read/write parameters from/to the FIXSRC 1D block (file control).

_rw3DRecord(g, z)[source]

Read/write fixed source data from 3D block records.

Parameters

  • g (int) – The gamma energy group index.

  • z (int) – The DIF3D axial node index.