Request ID	51		Type of the request	Special Purpose Quantity
Target	Reaction and process	Incident Energy	Secondary energy or angle	Target uncertainty	Covariance
26-FE-54	(n,a) SIG,SPA	252Cf(sf)		2-5	Y
Field	Subfield	Date Request created	Date Request accepted	Ongoing action
Dosimetry	Fast fission, D-T fusion	06-OCT-17	06-OCT-17

Requester: Dr Stanislav SIMAKOV at KARLSRUHE, GER
Email: stanislav.simakov@partner.kit.edu

Project (context): IRDFF project

Impact:
The International Reactor Dosimetry and Fusion File (IRDFF) aims at providing evaluated neutron dosimetry reactions validated for all applications related to fission reactors and fusion technology development [IAEA2017].

Accuracy:
2%-5%

Justification document:
Accurate cross sections as well as spectrum-averaged cross sections (SACS) in relevant and well-characterized neutron fields are essential for improvement and validation of the evaluated data [Simakov2017].

Comment from requester:
Measurements of the spectrum-averaged cross section are missing for validation purposes, especially for improvement of the prompt fission neutron spectrum at high energy. See Cf252U235_HighThreshold.pdf below.

References

[IAEA2017] IAEA CRP on Testing and Improving the International Reactor Dosimetry and Fusion File (IRDFF),
http://www-nds.iaea.org/IRDFFtest/.
[Simakov2017] S. Simakov, et al., “Proposals for new measurements for IRDFF community and HPRL”, September 2017.

Review comment:

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

Main references:
Please report any missing information to hprlinfo@oecd-nea.org

Experiments

M. Schulc, M. Kostal, et al., Validation of differential cross sections by means of 252Cf spectral averaged cross sections, Applied Radiation and Isotopes 132 (2018) 29

Theory/Evaluation

A. Trkov et al., IRDFF-II: A New Neutron Metrology Library, Nuclear Data Sheets 163 (2020) 1

Validation

M. Schulc, M. Kostal, et al., On 54Fe neutron cross section importance in iron, Applied Radiation and Isotopes 128 (2017) 86
M. Kostal, et al., Measurement of various monitors reaction rate in a special core at LR-0reactor, Annals of Nuclear Energy 112 (2018) 759

Additional file attached:Simakov2017.pdf
Additional file attached:Cf252U235_HighThreshold.pdf