Ghana is in the process of converting its fuel from Highly Enriched Uranium (HEU) to
Lowly Enriched Uranium (LEU) even though the HEU fuel is not fully spent, thus the
handling of the irradiated fuel is in the offing. Irradiated fuel consists of radioactive
fission and activation products generated in the nuclear fuel which are hazardous to
personnel, environment and the public. As a result, the knowledge of the dose rate will
aid in safe guarding the process of core conversion. Two computer codes used to carry
out this research work were ORIGEN-S; for computing changes in the isotopic
concentrations during neutron irradiation and radioactive decay as well as to determine
the source term and MCNP6; which used the source term estimated by the ORIGEN-S
code to calculate the dose rate in mrem using point detectors and also to determine the
criticality of the core at different heights above the bottom of the core in order to mimic
the process of unloading the core. Most of the radionuclides present after the core
depletion contributed to the source term of 1.767X1013photons/sec which was observed
after thirty days of the cooling period. The dose rates ranged between 3.51x10-25mGy/hr
and 4.27x104mGy/hr with the detectors placed at positions above the reactor core, the
control room (wall, door and window) and the rabbit room. The criticality (keff) also
decreased from 0.99442 to 0.01238 which indicates that the nuclear fuel will remain sub
critical. The results proved that the core unloading will be done safely.
CDR, C (2021). ESTIMATION OF THE DOSE RATE OF NUCLEAR FUEL OF GHANA RESEARCH REACTOR-1 (GHARR-1) .. Afribary.com: Retrieved April 11, 2021, from https://afribary.com/works/estimation-of-the-dose-rate-of-nuclear-fuel-of-ghana-research-reactor-1-gharr-1-1
Coalition, CDR. "ESTIMATION OF THE DOSE RATE OF NUCLEAR FUEL OF GHANA RESEARCH REACTOR-1 (GHARR-1) ." Afribary.com. Afribary.com, 02 Apr. 2021, https://afribary.com/works/estimation-of-the-dose-rate-of-nuclear-fuel-of-ghana-research-reactor-1-gharr-1-1 . Accessed 11 Apr. 2021.
Coalition, CDR. "ESTIMATION OF THE DOSE RATE OF NUCLEAR FUEL OF GHANA RESEARCH REACTOR-1 (GHARR-1) .". Afribary.com, Afribary.com, 02 Apr. 2021. Web. 11 Apr. 2021. < https://afribary.com/works/estimation-of-the-dose-rate-of-nuclear-fuel-of-ghana-research-reactor-1-gharr-1-1 >.
Coalition, CDR. "ESTIMATION OF THE DOSE RATE OF NUCLEAR FUEL OF GHANA RESEARCH REACTOR-1 (GHARR-1) ." Afribary.com (2021). Accessed April 11, 2021. https://afribary.com/works/estimation-of-the-dose-rate-of-nuclear-fuel-of-ghana-research-reactor-1-gharr-1-1