AN ANALYSIS OF NEUTRON FLUX SPATIAL OSCILLATION DUE TO XENON BUILD-UP IN THE BRITISH LARGE POWER REACTOR CORE

Technical Report · Mon Jun 01 04:00:00 EDT 1959

OSTI ID:4219015

Mochizuki, K

Neutron flux spatial oscillation due to xenon build up in the reactor core is a well-known charactcristic in the large power reactor. Especially the reactor with a positive temperature coefficient of reactivity tends to have such a characteristic. An analysis was pursued on a British Power Reactor. Specific features taken into consideration were a large neutron flux flattened zone in the core and a graphite sleeve in each coolant channel. First, the threshold values of the temperature coefficient to initiate oscillation of successive order of modes in radial and azimuthal directions as well as oscillation periods were calculated. Secondly, the effect of sleeve on threshold value and oscillation period was investigated. Thirdly, in order to clarify this phenomenon, a vector analysis was made which helps to understand the critical condition to initiate the oscillation as well as the relation between effects of neutron leakage, temperature coefficients of fuel and moderator, and xenon poisoning. (auth)

• Research Organization: Japan. Atomic Energy Research Inst., Tokyo
• NSA Number: NSA-14-004946
• OSTI ID: 4219015
• Report Number(s): JAERI-1006-C
• Country of Publication: Japan
• Language: English

Related Subjects

FUEL ELEMENTS
GRAPHITE
LEAKS
MODERATORS
NEUTRON FLUX
NEUTRONS
OSCILLATIONS
POISONING
POWER PLANTS
REACTIVITY
REACTOR CORE
REACTOR TECHNOLOGY
TEMPERATURE
TEMPERATURE COEFFICIENT
XENON
ZONES