Published March 1975 | Version v1
Report Metadata-only

Space-time kinetics of CANDU systems

Creators

  • 1. Atomic Energy of Canada Ltd., Missisauga, Ontario

Description

Characteristics of CANDU systems which affect space dependent neutron transients have been studied. Major factors have been found to be neutronic decoupling of reactor segments due to deliberate flattening of the power distribution; retardation of the power shape transient due to delayed neutron holdback; photoneutron production in heavy water; asymmetric insertion of reactivity devices. A full scale excursion analysis in 3-dimensions is presented to show the degree and manner in which these characteristics contribute to produce the overall spatially-dependent neutron transients when a detailed model of the system is used in the simulation. (orig.)

Abstract (German)

Die Untersuchung befasst sich mit Merkmalen von CANDU-Systemen, die raumabhaengige Neutronentransienten beeinflussen. Als Hauptfaktoren wurden festgestellt: neutronische Entkopplung von Reaktorteilen aufgrund einer absichtlichen Abflachung der Energieverteilung; Verzoegerung des Energieformtransienten durch verzoegerte Neutronenretention; Entstehung von Photoneutronen in schwerem Wasser; asymmetrische Erhoehung der Reaktivitaet. Es wird eine vollstaendige dreidimensionale Exkursionsanalyse vorgelegt, um zu zeigen, bis zu welchem Grad und auf welche Weise diese Merkmale zur Entstehung der gesamten raumabhaengigen Neutronentransienten beitragen, wenn in der Simulation ein detailliertes Modell des Systems verwendet wird. (orig./AK)

Additional details

Publishing Information

Imprint Title
Proceedings of the joint NEACRP/CSNI specialists' meeting on new developments in three-dimensional neutron kinetics and review of kinetics benchmark calculations
Imprint Pagination
p. 209-255.
Report number
MRR--145

Conference

Title
Joint NEACRP/CSNI specialists' meeting on new developments in three-dimensional neutron kinetics and review of kinetics benchmark calculations.
Dates
22 Jan 1975.
Place
Garching/Muenchen, F.R. Germany.

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
7223928
Subject category
S22: GENERAL STUDIES OF NUCLEAR REACTORS; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Resource subtype / Literary indicator
Conference, Non-conventional Literature
Descriptors DEI
NEUTRON FLUX FLATTENING; PHWR TYPE REACTORS; REACTOR KINETICS; REACTOR KINETICS EQUATIONS; SIMULATION; SPACE DEPENDENCE; THREE-DIMENSIONAL CALCULATIONS; TRANSIENTS
Descriptors DEC
EQUATIONS; HEAVY WATER COOLED REACTORS; HEAVY WATER MODERATED REACTORS; KINETICS; REACTORS

Optional Information

Notes
22 figs.; 1 tab.; 4 refs. Available from ZAED.
Secondary number(s)
AED-Conf--75-328-000.