Calculation of Gamma Radiation Level and the Thermal Neutron Flux in the Detectors of the Startup and Shutdown Channels of the MERLIN Reactors; BERECHNUNG DES GAMMA-STRAHLUNGSPEGELS UND DES THERMISCHEN NEUTRONENFLUSSES IN DEN DETEKTOREN DES ANFAHR-UND ABSCHALTKANALS DES REAKTORS, MERLIN

Technical Report · Thu Jun 01 04:00:00 EDT 1961

OSTI ID:4813375

Meister, G

An investigation was made of the nuclear instrumentatnnon of the MERLIN reactor. The signals in the startup and shutdown channnnels for different characteristic operating conditions of the reactor were calculated. Type, position, and screening of the radiation detectors used in the two channels are described. The method of calculating the gamma radiation flux at the location of the detector is explained and the results are summarized. The gammasignal in the shutdown channel was calculated for the critical reactor at saturation of the fission product concentration and the signal in the startup channel for a shutdown reactor depending on the shutdown period which was assumed to be of such length that the fission product concentration had attained equilibrium. The calculations of the thermal neutron flux at the position of the detector are given. The corresponding neutron signals in the shutdown channel for the critical reactor and in the startup channel for the suberitical reactor were calculated at different values of negative reactivity. The results in regard to the function of the two channels are discussed. (tr-auth)

• Research Organization: Kernforschungsanlage, Julich, Germany
• NSA Number: NSA-16-006103
• OSTI ID: 4813375
• Report Number(s): JUL-10-Re
• Country of Publication: Germany
• Language: English

Related Subjects

BACKGROUND
CONFIGURATION
CONTROL
CONTROL SYSTEMS
CRITICALITY
DENSITY
EQUATIONS
FISSION PRODUCTS
GAMMA DETECTION
GAMMA RADIATION
INSTRUMENTS
MERLIN
MONITORING
MULTIPLICATION FACTORS
NEUTRON DETECTION
NEUTRON FLUX
PERFORMANCE
PLANNING
POISONING
RADIATION DETECTORS
REACTIVITY
REACTOR CORE
REACTOR TECHNOLOGY
RESEARCH REACTORS
SENSITIVITY
SHUTDOWN
SIGNALS
STABILITY
STARTUP
THERMAL NEUTRONS
VARIATIONS