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OECD/NEA Burnup Credit Criticality Benchmark, Analysis of Phase II-B Results: Conceptual PWR Spent Fuel Transportation Cask

OECD/NEA Burnup Credit Criticality Benchmark, Analysis of Phase II-B Results: Conceptual PWR Spent Fuel Transportation Cask

Author(s)
Nouri, A.
Publication Date
The OECD/NEA “Burn-up Credit Criticality Benchmark” working group has studied the effect of axial burn-up profile on the criticality of a realistic PWR spent fuel transport cask (Phase II-B). The final results of this benchmark are presented and analysed in this report. Nine basic cases and two additional accident configurations were considered with the following varying parameters: burn-up (0 GWd/t for fresh fuel, 30 and 50 GWd/t), fuel composition (actinides only and actinides with fifteen fission products), axial burn-up discretisation (1 or 9 zones).
criticality pwr fuel transport cask end effect source convergence burnup axial burnup profile

PWR Axial Burnup Profile Analysis

PWR Axial Burnup Profile Analysis

Author(s)
OCRWM
Publication Date

The purpose of this activity is to develop a representative “limiting” axial burnup profile for pressurized water reactors (PWRs), which would encompass the isotopic axial variations caused by different assembly irradiation histories, and produce conservative isotopics with respect to criticality. The effect that the low burnup regions near the ends of spent fuel have on system reactivity is termed the “end-effect”. This calculation will quantify the end-effects associated with Pressurized Water Reactor (PWR) fuel assemblies emplaced in a hypothetical 21 PWR waste package.

criticality commercial spent nuclear fuel end effect storage axial burnup profile isotopic concentrations 21 pwr waste package pwr snf cal-dsu-nu-000012

BWR Axial Profile

BWR Axial Profile

Author(s)
OCRWM
Publication Date

The purpose of this calculation is to develop axial profiles for estimating the axial variation in burnup of a boiling water reactor (BWR) assembly spent nuclear fuel (SNF) given the average burnup of an assembly. A discharged fuel assembly typically exhibits higher burnup in the center and lower burnup at the ends of the assembly. Criticality safety analyses taking credit for SNF burnup must account for axially varying burnup relative to calculations based on uniformly distributed assembly average burnup due to the under-burned tips.

criticality end effect axial burnup profile bwr snf cal-dsu-nu-000005

Aspects of Governance in the Practical Implementation of the Concept of Reversibility for Deep Geological Disposal

SED Publication Type

Aspects of Governance in the Practical Implementation of the Concept of Reversibility for Deep Geological Disposal

Author
COWAM
Publication Date

The European project COWAM in Practice (CIP) was aimed to lead for three years (2007-2009) a process of monitoring, analyzing and evaluating the governance linked with radioactive waste management. This project, in cooperation with a research group and stakeholders, was conducted in parallel in 5 European countries (Spain, France, United Kingdom, Romania, Slovenia).

repository waste management france reversibility siting united kingdom spain romania slovenia

An Historical and Prospective View of Romanian Decision Making in the Nuclear Domain

SED Publication Type

An Historical and Prospective View of Romanian Decision Making in the Nuclear Domain

Author
COWAM
Publication Date

The following graphics were developed by NF Marin Constantin (INR) for presentation and discussion at the 2nd NSG meeting in Romania (January 2008). 1. DMP for LILW Repository in Romania - Main Phases 2. Romanian History of Nuclear Power - Main Facts and Decisions 3. Cernavoda Area DMP: Dialogue Planning Including CIP Actions 4. Hypothetical Nuclear Industry Formulation of the DMP Stakes and Issues 5. Hypothetical Public Formulation of the DMP Stakes and Issues 6. How to Improve the Public Contribution to the DMP? Proposal for NSG Discussion

repository siting romania dmp nuclear power

Impact of Nuclear Information on Young People's Knowledge and Attitudes: Methods/Participatory tools in an Educational Program WP1

SED Publication Type

Impact of Nuclear Information on Young People's Knowledge and Attitudes: Methods/Participatory tools in an Educational Program WP1

Author
COWAM
Publication Date

Despite in Romania nuclear research activities were started in early 50s, the nuclear power is very young. First NPP, Cernavoda Unit 1, about 600 MWe, was in operation since 1996. Next unit (Cernavoda Unit2) will be in operation at the end of 2007. Therefore, a relative low amount of high level waste was produced. However, some problems already exists in Romania, mainly related to historical radioactive wastes released by nuclear industry and research.

public perception waste management siting romania
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