JAEA-Conf 2011-002 - 日本原子力研究開発機構
JAEA-Conf 2011-002 - 日本原子力研究開発機構
JAEA-Conf 2011-002 - 日本原子力研究開発機構
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>JAEA</strong>-<strong>Conf</strong> <strong>2011</strong>-<strong>002</strong><br />
1. The recent activities under the international collaborations<br />
NDEL/KAERI collaborates with the international organizations such as IAEA and<br />
OECD/NEA, and the foreign institutes such as ORNL and BNL regarding the evaluation,<br />
processing and validation of nuclear data to satisfy present requests and to prepare future<br />
latent needs. Below summarizes the recent activities of NDEL/KAERI in collaboration with<br />
international organizations and foreign institutes.<br />
- Fusion Evaluated Nuclear Data Library (FENDL) CRP of IAEA<br />
- Participation in IAEA EXFOR compilations since 2009<br />
- Contribution of group constant libraries to OECD/NEA Data Bank.<br />
- Evaluations and uncertainty analysis of Minor actinides with ORNL<br />
- Improvements of resonance module ncluding covariances with BNL<br />
- Evaluation of neutron cross sections for fast energy region with BNL<br />
2. Production and validation of evaluated nuclear data<br />
1) Developments of nuclear data evaluation methodology<br />
Recent evaluations of neutron cross section covariances in the resolved resonance<br />
region reveal the need for further research in this area. Major issues include declining<br />
uncertainties in multigroup representations and proper treatment of scattering radius<br />
uncertainty. A practical method is being investigated for estimating neutron radiative<br />
capture and elastic scattering covariances in the resolved resonance region. The<br />
method is based on a “kernel approximation” using resonance parameter uncertainties<br />
from the Atlas of Neutron Resonances. Suitable analytical expressions were derived<br />
from the consideration of cross section sensitivities in order to determine cross section<br />
uncertainties. The role of resonance-resonance and bin-bin correlations is specifically<br />
studied.<br />
2) New evaluations of charged particle induced nuclear reactions<br />
- The evaluations are performing for reactions induced by charged particles including<br />
proton, deuteron, and alpha. The considered nuclides are 28-30 Si, 27 Al, 54,56,57,58 Fe,<br />
92,94,95,96,97,98,100 Mo, 58,60,61,62,64 Ni.<br />
- Evaluations will go through validations and verifications by FENDL CRP.<br />
3) New evaluations of minor actinides for Advanced Fuel Cycle (AFC)<br />
- Producing new evaluations for Advanced Fuel Cycle (AFC) including covariance<br />
files. The considered nuclides are 237 Np, 240 Pu, 240-250 Cm<br />
- Evaluation, validation and benchmarks are in collaboration with ORNL