This standard identifies and describes the specifications for
developing, preparing, and documenting nuclear data sets to be used
in reactor design calculations. The specifications include ~a!
criteria for acceptance of evaluated nuclear data sets; ~b!
criteria for processing evaluated data and preparation of processed
continuous data and averaged data sets; and ~c! identification of
specific evaluated, processed continuous, and averaged data sets
that meet these criteria for specific reactor types.
Nuclear data sets shall consist of basic microscopic nuclear
physics data that include but are not limited to the important
neutroninduced reactions. The data set, in the processed form, will
be primarily utilized as input to fission reactor core design
calculations but may have applications to other fields, such as
shielding, dosimetry, or fusion studies. The specific types of data
sets considered to fall within the scope of this standard are shown
in Figure 1 and defined more precisely in Section 2, "Definitions."
As indicated in Figure 1, the scope of this standard does not
pertain to experimental techniques for the measurement of nuclear
data or to the development of nuclear model theory. The scope does
not apply to a few-group collapsed data set, which is
representative of a particular application except for a requirement
for the documentation of collapsed data sets when such data sets
are prepared as part of the testing of the nuclear data sets
covered by this standard. The distinguished features of data sets
considered to fall within the scope of this standard are that they
can be represented as being applicable to a wide range of reactor
compositions, geometries, and spectra.