ID | 22 |
---|---|
Type | |
Target | 95-Am-242m |
Reaction | (n,f) |
Quantity | SIG - Cross section |
Incident energy | 0.5 keV - 6 MeV |
Accuracy | 3-8 % |
Field(s) | Fission |
Subfield | Fast Reactors (SFR) |
Accepted date | 11-Sep-2008 |
Status | Work in progress |
Latest review date | 22-Apr-2022 |
Prof. Massimo SALVATORES at CADARACHE, FR
Project (context)NEA WPEC Subgroup 26
ImpactDesign phases of selected reactor and fuel cycle concepts require improved data and methods in order to reduce margins for both economical and safety reasons. A first indicative nuclear data target accuracy assessment was made within WPEC Subgroup 26 (SG-26). The assessment indicated a list of nuclear data priorities for each of the systems considered (ABTR, SFR, EPR, GFR, LFR, ADMAB, VHTR, EPR). These nuclear data priorities should all be addressed to meet target accuracy requirements for the integral parameters characterizing those systems (see the accompanying requests originating from SG-26).
Requested accuracy is required to meet target accuracy for keff for Sodium-cooled Fast Reactor in a TRU burning configuration, i.e., with a Conversion Ratio CR<1 (SFR). Details are provided in the OECD/NEA WPEC Subgroup 26 Final Report: "Uncertainty and Target Accuracy Assessment for Innovative Systems Using Recent Covariance Data Evaluations" (link to WPEC Subgroup 26 Report in PDF format, 6 Mb).
Target accuracies are specified per system and per energy group when they are not met by the BOLNA estimate of the current (initial) uncertainties.
Energy Range | Initial versus target uncertainties (%) | |||||||
Initial | SFR | LFR | ADMAB | |||||
2.23 - 6.07 MeV | 23 | 8 | ||||||
1.35 - 2.23 MeV | 20 | 8 | ||||||
0.498- 1.35 MeV | 17 | 4 | 6 | |||||
83 - 498 - keV | 17 | 3 | 8 | 5 | ||||
67.4 - 183 - keV | 17 | 3 | 5 | |||||
24.8 - 67.4 keV | 14 | 4 | 6 | |||||
9.12 - 24.8 keV | 12 | 4 | 6 | |||||
2.03 - 9.12 keV | 12 | 7 | ||||||
0.454- 2.03 keV | 12 | 5 |
OECD/NEA WPEC Subgroup 26 Final Report: "Uncertainty and Target Accuracy Assessment for Innovative Systems Using Recent Covariance Data Evaluations" (link to WPEC Subgroup 26 Report in PDF format, 6 Mb).
Comment from requesterSFR: Sodium-cooled Fast Reactor in a TRU burning configuration, i.e., with a Conversion Ratio CR<1
EFR: European Fast Reactor with full recycling of MA and CR~1
GFR: Gas-cooled Fast Reactor also with full recycling of MA
LFR: Lead-cooled Fast Reactor as defined for an IAEA benchmark
ABTR: Advanced Burner Test Reactor Na-cooled core, recently studied within the GNEP initiative
ADMAB: Accelerator-Driven Minor Actinides Burner
PWR: Pressurized Water Reactor
Given the present state of knowledge the above target accuracies are very tight. However, any attempt that significantly contributes to reducing the present accuracy for this quantity is strongly encouraged. Any such attempt will significantly enhance the accuracy with which reactor integral parameters may be estimated and will therefore impact economic and safety margins.
Work in progress (as of SG-C review of May 2018)
Main recent referencesPlease report any missing information to hprlinfo@oecd-nea.org
Experiments
Theory/Evaluation
Validation