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Coupled core criticality calculations with control rods located in the central reflector region

Abstract

The reactivity of a coupled core is controlled by a set of control rods distributed in the central reflector region. The reactor contains two compact cores cooled and moderated by light water. Control rods are designed to have reactivity worths sufficient to start, control and shutdown the coupled system. Each core in a coupled system is in subcritical conditions without any absorber then each core needs to the other core to fulfill nuclear chain reaction and to approach the criticality. In this case, each core is considered clean which is suitable for research reactor with low flux disturbance and better neutron economy, in addition to the advantage of disappearing the cut corner fuel baskets. This facilitate the in core fuel management with identical fuel baskets. Hot spots will disappear. This leads to a good heat transfer process. the excess reactivity and the shutdown margin are calculated for some of reflector as coupling region gives sufficient area for coupled core are calculated cost. The fluctuations of reactivity for coupled core are calculated by noise analysis technique and compared with that for rode core. The results show low reactivity perturbation associated with coupled core.
Authors:
Sobhy, M [1] 
  1. Reactor depatrment, nuclear research center, Inshaas (Egypt)
Publication Date:
Oct 01, 1995
Product Type:
Miscellaneous
Report Number:
INIS-EG-001; CONF-9411323-
Reference Number:
SCA: 220400; PA: AIX-28:030972; EDB-97:054571; SN: 97001765413
Resource Relation:
Conference: 2. Arab conference on the peaceful uses of atomic energy, Cairo (Egypt), 5-9 Nov 1994; Other Information: PBD: Oct 1995; Related Information: Is Part Of Proceedings of the second Arab conference on the peaceful uses of atomic energy. Part II: A and B; Barakat, M.F.; El-Mashri, S.M. [eds.]; PB: 1199 p.
Subject:
22 NUCLEAR REACTOR TECHNOLOGY; COUPLED REACTOR CORES; CONTROL ELEMENTS; CRITICALITY; BERYLLIUM OXIDES; CHAIN REACTIONS; EXPERIMENTAL DATA; GRAPHITE; HEAT TRANSFER; HOT SPOTS; NEUTRON FLUX; RESEARCH REACTORS
OSTI ID:
456072
Research Organizations:
Atomic Energy Authority, Cairo (Egypt); Arab Atomic Energy Agency (AAEA), Tunis (Tunisia); Middle Eastern Regional Radioisotope Centre for the Arab Countries, Cairo (Egypt)
Country of Origin:
Egypt
Language:
English
Other Identifying Numbers:
Other: ON: DE97620040; ISBN 9973-9927-3-3; TRN: EG9601632030972
Availability:
INIS; OSTI as DE97620040
Submitting Site:
INIS
Size:
pp. 39
Announcement Date:

Citation Formats

Sobhy, M. Coupled core criticality calculations with control rods located in the central reflector region. Egypt: N. p., 1995. Web.
Sobhy, M. Coupled core criticality calculations with control rods located in the central reflector region. Egypt.
Sobhy, M. 1995. "Coupled core criticality calculations with control rods located in the central reflector region." Egypt.
@misc{etde_456072,
title = {Coupled core criticality calculations with control rods located in the central reflector region}
author = {Sobhy, M}
abstractNote = {The reactivity of a coupled core is controlled by a set of control rods distributed in the central reflector region. The reactor contains two compact cores cooled and moderated by light water. Control rods are designed to have reactivity worths sufficient to start, control and shutdown the coupled system. Each core in a coupled system is in subcritical conditions without any absorber then each core needs to the other core to fulfill nuclear chain reaction and to approach the criticality. In this case, each core is considered clean which is suitable for research reactor with low flux disturbance and better neutron economy, in addition to the advantage of disappearing the cut corner fuel baskets. This facilitate the in core fuel management with identical fuel baskets. Hot spots will disappear. This leads to a good heat transfer process. the excess reactivity and the shutdown margin are calculated for some of reflector as coupling region gives sufficient area for coupled core are calculated cost. The fluctuations of reactivity for coupled core are calculated by noise analysis technique and compared with that for rode core. The results show low reactivity perturbation associated with coupled core.}
place = {Egypt}
year = {1995}
month = {Oct}
}