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)

Read a binary FIXSRC file.

armi.nuclearDataIO.cccc.fixsrc.writeBinary(fileName, fixSrcArray)

Write fixed source data to a FIXSRC file.

class armi.nuclearDataIO.cccc.fixsrc.FIXSRC(fileName, fileMode, fixSrc)

Bases: 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.

• fixSrc (np.ndarray) – Core-wide multigroup gamma fixed-source data.

readWrite()

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