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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

Long Term Governance for Radioactive Waste Management WP4

SED Publication Type

Long Term Governance for Radioactive Waste Management WP4

Author
COWAM
Publication Date

The purpose of COWAM2 Work Package 4 (WP4) on &quote;long term governance&quote; was to identify, discuss and analyse the institutional, ethical, economic and legal considerations raised by long term radioactive waste storage or disposal on the three interrelated issues of: (i) responsibility and ownership of radioactive waste over long term, (ii) continuity of local dialogue between stakeholders and monitoring of radioactive waste management facilities, and (iii) compensation and sustainable development.

public perception radioactive waste waste management sustainability siting governance society ethics economics

LONG TERM GOVERNANCE FOR RADIOACTIVE WASTE MANAGEMENT ANNEX OF THE FINAL REPORT OF COWAM2 - WORK PACKAGE 4

SED Publication Type

LONG TERM GOVERNANCE FOR RADIOACTIVE WASTE MANAGEMENT ANNEX OF THE FINAL REPORT OF COWAM2 - WORK PACKAGE 4

Author
COWAM
Publication Date

The purpose of COWAM2 Work Package 4 (WP4) on &quote;long term governance&quote; was to identify, discuss and analyse the institutional, ethical, economic and legal considerations raised by long term radioactive waste storage or disposal on the three interrelated issues of: (i) responsibility and ownership of radioactive waste over long term, (ii) continuity of local dialogue between stakeholders and monitoring of radioactive waste management facilities, and (iii) compensation and sustainable development.

public perception radioactive waste waste management sustainability siting governance society ethics economics

Nuclear waste management from a local perspective: Reflections for a Better Governance Final Report

SED Publication Type

Nuclear waste management from a local perspective: Reflections for a Better Governance Final Report

Author
COWAM
Publication Date

During the 1990s, nuclear waste programmes in nearly every concerned country met many difficulties. Nuclear waste management was seen as a technical issue, and the local communities were only involved in the last stage of the decision-making process when almost all components of the decision were already fixed. The management of high level radioactive waste is now recognised as a complex decision-making process entailing technical, ethical, social, political and economic dimensions where no solution can be reached solely on the basis of technical considerations.

public perception waste management siting governance local involvement
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