Published 2016 | Version v1
Miscellaneous Metadata-only

Application of position-dependent delayed-neutron fractions to IQS calculations for PT-SCWR

Creators

  • 1. University of Ontario Institute of Technology, Oshawa, Ontario (Canada)

Description

Delayed-neutron fractions depend on fuel burnup and therefore they are position-dependent because fuel burnup is position dependent. This study investigates the use of position-dependent delayed-neutron fractions for Improved Quasistatic kinetics calculations. A new module, MODPARA, is developed and implemented in the 3-D diffusion code DONJON for this purpose. The position dependence of delayed-neutron fractions is taken into account in the calculation of both the amplitude function and the flux shape function during the transient. The amplitude function is primarily influenced by the whole-core effective delayed neutron fractions which are now calculated by accounting for the spatial dependence of the local delayed-neutron fractions. Transient calculations for the Pressure-Tube Super-Critical-Water-cooled Reactor (PT-SCWR) show that accounting for the position dependence of the delayed-neutron fractions changes the time dependence of the amplitude function by as much as 11% compared to the case where position-independent delayed-neutron fractions are used and thus is a desirable enhancement to the IQS method. (author)

Part of:
Nuclear in the 21st century: global directions and Canada's role. 36th Annual CNS conference and 40th CNS/CNA student conference

Additional details

Publishing Information

Publisher
Canadian Nuclear Society
Imprint Place
Toronto, Ontario (Canada)
Imprint Title
Nuclear in the 21st century: global directions and Canada's role. 36th Annual CNS conference and 40th CNS/CNA student conference
Imprint Pagination
121 Megabytes
Journal Page Range
[9 p.]

Conference

Title
36. Annual Canadian Nuclear Society conference; 40. CNS/CNA student conference
Dates
19-22 Jun 2016
Place
Toronto, Ontario (Canada)

INIS

Country of Publication
Canada
Country of Input or Organization
Canada
INIS RN
50007398
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Resource subtype / Literary indicator
Conference, Non-conventional Literature
Descriptors DEI
BURNUP; COMPUTER CODES; DELAYED NEUTRONS; DIFFUSION MONTE CARLO METHOD; PWR TYPE REACTORS; SIMULATION; SUPERCRITICAL STATE; TURBULENT FLOW
Descriptors DEC
BARYONS; CALCULATION METHODS; ELEMENTARY PARTICLES; ENRICHED URANIUM REACTORS; FERMIONS; FISSION NEUTRONS; FLUID FLOW; HADRONS; MONTE CARLO METHOD; NEUTRONS; NUCLEONS; POWER REACTORS; QUANTUM MONTE CARLO METHOD; REACTORS; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS

Optional Information

Notes
10 refs., 8 figs., 2 tabs.