JAEA-Conf 2011-002 - 日本原子力研究開発機構

JAEA-Conf 2011-002
3. Perspective of Future Nuclear Data Activities
The 2nd Period Mid-term Plan of JAEA (2010-2014) is “incident energy expansion
of JENDL” for nuclear data to produce Intermediate Energy Files (JENDL/HE, JENDL/PD,
etc.). For update of the general purpose file of JENDL (JENDL-4.1?), covariance data and
quality assurance are also important. Furthermore, JENDL Activation File (JENDL/A) with
error data is also mentioned above.
To prepare and update nuclear data files, the development of original nuclear reaction
model code is necessary for easily and timely nuclear data evaluation and/or improvement to
meet user requirements. For this purpose, the code CCONE is the strong candidate. In the
short period, the CCONE is planned to be improved by adding some models, such as multiple
nucleon and light charged particle emissions from pre-equilibrium stage, to expand the
incident energy region, and for unknown (at this moment) user needs. This improvement is
also useful to prepare for the next generation.
As the preparation for the next generation, some items related to nuclear data
activities not only in Japan and also in the world stand on the edge of precipice. They are
crisis of the human resources for nuclear data evaluation (especially for decay and nuclear
structure data), the budget (especially for nuclear data measurements), and presence
(appearing) to the stake-holders. Those should be considered as soon as possible so that
nuclear data activity level is kept for next generations.
To avoid the crisis of human resources, the urgent fostering talents (tutorials,
production of textbook, etc.) are required for nuclear data producers, especially for the items
of “Endangered Species” such as ENSDF evaluators, resonance analyzers, producers of the
thermal scattering law, etc. And the next generation evaluators for fission reaction (neutron
spectra, delayed neutron, FPY, etc.), light-mass nuclides and evaluation tool makers should
also be considered. Collaborations with the people of nuclear physics fields such as
fundamental theories, microscopic approaches are getting more important. To produce
evaluated nuclear data file, the international collaborations and considering TENDL-like
approaches might be necessary.
Though the certain level budget is desired to keep measurement facilities for nuclear
data, recently if faces to some difficulty. It is true that nuclear data is an item like air,
however, producers cannot live on air. Here international collaborations to share the
experiments into the several facilities like European example should be convinced urgently.
For obtaining the budget, it is also important to show the presence of nuclear data with the
impact to the stake-holders such as the government (both nuclear power developments and
regulation sides), industry users and plant makers.
4. Summary
The JENDL-4 has been released in 2010 as one of goals of the first period mid-term
research plan for JAEA. In the plan for the second period, the objective is “incident energy
expansion of JENDL”. The objective can be achieved by producing JENDL/HE,
JENDL/PD, and JENDL/PK. For this purpose, CCONE is planned to be improved by
adding some models. The nuclear data for the burn-up, activation, and PKA/DPA
calculations will be prepared for the applications of reactors, safety research, material science,
nuclear forensics, etc. The urgent problems for human resources, presence to the
stake-holders, and budget should be solved for example, by efforts of the international
collaborations, etc.