title: Design of boron carbide-shielded irradiation channel of the outer irradiation channel of the Ghana Research Reactor-1 using MCNP.
abstract: The MCNP model for the Ghana Research Reactor-1 was redesigned to incorporate a boron carbide-shielded irradiation channel in one of the outer irradiation channels. Extensive investigations were made before arriving at the final design of only one boron carbide covered outer irradiation channel; as all the other designs that were considered did not give desirable results of neutronic performance. The concept of redesigning a new MCNP model, which has a boron carbide-shielded channel is to equip the Ghana Research Reactor-1 with the means of performing efficient epithermal neutron activation analysis. After the simulation, a comparison of the results from the original MCNP model for the Ghana Research Reactor-1 and the new redesigned model of the boron carbide shielded channel was made. The final effective criticality of the original MCNP model for the GHARR-1 was recorded as 1.00402 while that of the new boron carbide designed model was recorded as 1.00282. Also, a final prompt neutron lifetime of 1.5245 × 10(-4)s was recorded for the new boron carbide designed model while a value of 1.5571 × 10(-7)s was recorded for the original MCNP design of the GHARR-1.
authors.affiliation: Ghana Atomic Energy Commission, National Nuclear Research Institute, P.O. Box LG80, Legon, Ghana. adibola2001@yahoo.com
authors.forename: R G
authors.initials: RG
authors.lastname: Abrefah
authors.forename: R B M
authors.initials: RB
authors.lastname: Sogbadji
authors.forename: E
authors.initials: E
authors.lastname: Ampomah-Amoako
authors.forename: S A
authors.initials: SA
authors.lastname: Birikorang
authors.forename: H C
authors.initials: HC
authors.lastname: Odoi
authors.forename: B J B
authors.initials: BJ
authors.lastname: Nyarko