3. DESCRIPTION OF PROBLEM OR FUNCTION
EMERALD-NORMAL is designed
for the calculation of radiation releases and exposures resulting
from normal operation of a large pressurized water reactor. The
approach used is similar to an analog simulation of a real system.
Each component or volume in the plant which contains a radioactive
material is represented by a subroutine which keeps track of the
production, transfer, decay, and absorption of radioactivity in
that volume. During the course of the analysis, activity is
transferred from subroutine to subroutine in the program as it
would be transferred from place to place in the plant. Some of
this activity is then released to the atmosphere and to the
discharge canal. The rates of transfer, leakage, production,
cleanup, decay, and release are read as input to the program.
Subroutines are also included which calculate the off-site
radiation exposures at various distances for individual isotopes
and sums of isotopes. The program contains a library of physical
data for the forty isotopes of most interest in licensing
calculations, and other isotopes can be added or substituted.
Because of the flexible nature of the simulation approach, the
EMERALD-NORMAL program can be used for most calculations involving
the production and release of radioactive material. These include
design, operation, and licensing studies.