NEA Nuclear Data High Priority Request List, HPRL


High Priority Requests (HPR)

General Requests (GR)

Special Purpose Quantities (SPQ)

New Request


Request ID17 Type of the request General request
TargetReaction and processIncident EnergySecondary energy or angleTarget uncertaintyCovariance
 96-CM-244 (n,f) prompt n  Eth-10 MeV  10 
FieldSubfieldDate Request createdDate Request acceptedOngoing action
 ADS Fast fission spectra 08-NOV-07 10-SEP-08 Y

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Requester: Mr Toshinobu SASA at JAEA, JPN

Project (context): J-PARC

It is necessary in the ADS design study. Obninsk scientists report important difference of fission neutron spectra from ENDF/B-VI evaluation at MeV energies.


Justification document:
T. Sugawara, K. Sugino, T. Sasa, "SND2006-V.10: Design of MA-loaded Core Experiments using J-PARC", T. Fukahori (Ed.), Proc. of 2006 Symposium on Nuclear Data, Jan. 25-26, 2007, RICOTTI, Tokai-mura, Ibaraki-ken, Japan, ISBN978-4-89047-138-6, Nuclear Data Division, Atomic Energy Society of Japan (2007) [CD-ROM], see also link.

Comment from requester:

Additional file attached: sugawara_t(MA-cores_JPARC).pdf

Review comment:

It appears that experimental work for the neutron-induced reaction will be near to impossible on account of the required amount of sample material. Could this work be carried out by using a transfer reaction?

The importance of the fission neutron spectrum is not contested. It is a significant problem also for the major actinides and for those it is a recurrent subject of debate. The present request is dubbed a general request since it is not backed by a direct sensitivity study. The methodology of such sensitivity studies was recently explored by WPEC Subgroup 26 (link to WPEC Subgroup 26 Report in PDF format, 6 Mb). In that report it is also mentioned that substantial uncertainties may result from the fission spectrum but that further work is required.

Entry Status:
Work in progress (as of SG-C review of May 2018)

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