Analysis of Pulsed Neutron Measurements on the Fuel Pebble Assembly During the Approach to Critical Mass

Conference · Sun Apr 30 00:00:00 EDT 1995

OSTI ID:459252

Brodkin, E. ^[1]; Lebedev, G. ^[1]

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1. National Research Centre, Moscow (Russian Federation). Kurchatov Institute

The two-dimensional cylindrical model of HTR-ASTRA fuel pebble bed assembly was used in the transport calculations of k_eff and corresponding Rossi-α for interpretation of pulsed neutron measurements which have been carrying out during approach to critical mass. This analysis demonstrates possibility to evaluate k_eff above 0.9 using α-prompt decay constant measured during core loading by fuel balls and to extrapolate these data for determination of critical mass similar to inverse counting technique.

• Research Organization: National Research Centre, Moscow (Russian Federation). Kurchatov Institute
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
• OSTI ID: 459252
• Report Number(s): CONF-950420; TRN: 97:007153
• Resource Relation: Journal Volume: 1-2; Conference: International Conference on Mathematics and Computations, Reactor Physics, and Environmental Analyses, Portland, OR (United States), 30 Apr - 4 May 1995; Other Information: PBD: 1995; Related Information: Is Part Of Proceedings of the international conference on mathematics and computations, reactor physics, and environmental analyses. Volume 1 and 2; PB: 1629 p.
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
FUEL ASSEMBLIES
CRITICAL MASS
PULSED NEUTRON TECHNIQUES
PEBBLE BED REACTORS
Nuclear Criticality Safety Program (NCSP)
K-Effective
Rossi-Alpha
Alpha-Prompt Decay Constant
Measures
Critical Mass Determination