Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

On the Resonance Instability of EBR-1 (in Japanese)

Journal Article · · Nippon Genshiryoku Gakkai-Shi
DOI:https://doi.org/10.3327/jaesj.3.522· OSTI ID:4841185
; ;
The experimental Breeder Reactor, EBR-1, received considerable attention when an oscillatory instability under abnormal operating conditions was observed. Investigations of kinetic characteristics revealed that a prompt positive power coefficient of reactivity, which is generally believed due to the bowing of fuel elements, and a more delayed negative power coefficient exist. Controlled oscillator measurements were performed with the result that EBR-1 exhibited resonance instability. Though a number of theoretical models of the coefficients was presented to study the instability, they do not fit the mechanism of the delayed negative coefficient. The models of feedback reactivity for Mark II and Mark III core loading are presented. For Mark II, the main point to be emphasized is the cause of time delay by heat transfer from the core to the structure. The delayed negative reactivity is treated by a transfer function that takes into account axial temperature distribution in the core. It is demonstrated that the delayed negative reactivity combined with the prompt positive reactivity is sufficient to permit the resonance instability. For Mark III, the frequency transfer functions of feedback reactivity were separated from the experiment. The model is compared with the result of measurements.
Research Organization:
Tokyo Inst. of Tech.
Sponsoring Organization:
USDOE
NSA Number:
NSA-15-030282
OSTI ID:
4841185
Journal Information:
Nippon Genshiryoku Gakkai-Shi, Journal Name: Nippon Genshiryoku Gakkai-Shi Journal Issue: 7 Vol. 3; ISSN 0004-7120
Country of Publication:
Country unknown/Code not available
Language:
Japanese

Similar Records

A Mechanism Explaining The Instability Of EBR-I, Mark III
Technical Report · Fri Sep 01 00:00:00 EDT 1961 · OSTI ID:4836022
INSTABILITY STUDIES WITH EBR-I, MARK III
Technical Report · Wed Nov 30 23:00:00 EST 1960 · OSTI ID:4080849
EBR-I, MARK III-DESIGN REPORT
Technical Report · Fri Feb 28 23:00:00 EST 1958 · OSTI ID:4341757

Related Subjects

BREEDING
DEFORMATION
DISTRIBUTION
EBR-1
EQUATIONS
FEEDBACK
FREQUENCY
FUEL ELEMENTS
FUNCTIONS
HEAT TRANSFER
MEASURED VALUES
MOCKUP
OSCILLATIONS
POWER
POWER PLANTS
REACTIVITY
REACTOR TECHNOLOGY
REACTORS
RESONANCE
STABILITY
TEMPERATURE
TRANSFER FUNCTIONS
VARIATIONS