Measurement of Reactivity by Means of Automatic Neutron Monitoring; MISURE DI REATTIVITA MEDIANTE CONTROLLO AUTOMATICO DEL FLUSSO NEUTRONICO

Technical Report · Tue Jan 01 04:00:00 EST 1963

OSTI ID:4159257

Ambrosini, G; Bozzoni, T

BS>A facility is described to measure absorption and fission cross section of small samples which are used in connection with the Ispra 2 swimming pool reactor. The measuring is done by compensating with a rotating rod and the reactivity controlled by the samples introduced into the reactor by means of a special device. Several factors affecting the measurement accuracy, such as reactor noise, temperature drift etc., are considered. System dynamics are studied and the design outlined to optimize a figure of merit that in this case is the measurement time, which effects the accuracy. By means of a continuous calibration method, it looks possible to reach an accuracy of about 1/100 of p.c.m. with samples of 10 p.c.m. An analogical study is described of the process where several assumptions of the theoretical design are considered and which confirms the previous results. (auth)

• Research Organization: Italy. Comitato Nazionale per l'Energie Nucleare. Laboratorio Ingegneria e Servomeccanismi Reattori, Ispra
• NSA Number: NSA-18-001305
• OSTI ID: 4159257
• Report Number(s): RT/ING(63)3
• Country of Publication: Italy
• Language: English

Related Subjects

ABSORPTION
CROSS SECTIONS
FISSION
ISPRA-2
MEASURED VALUES
MONITORING
NEUTRONS
PLANNING
POOL TYPE REACTOR
REACTIVITY
REACTOR TECHNOLOGY
RESEARCH REACTORS
RODS
ROTATION
SENSITIVITY
TEMPERATURE
WATER COOLANT
WATER MODERATOR