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Fusion Engineering and Design 18 (1991) 387-395 387 North-Holland
 

Summary: Fusion Engineering and Design 18 (1991) 387-395 387
North-Holland
Experimental verification of the current data and methods
for induced radioactivity and decay heat calculation
in D-T fusion reactors
Y. Ikeda, C. Konno, Y. Oyama, T. Nakamura
Japan Atomic EnergyResearchInstitute, Tokai-mura, lbaraki-ken 319-11,Japan
A. Kumar, M.Z. Youssef, M.A. Abdou
Unicersity of California, Los Angeles, Los Angeles CA 90024-1579, USA
Induced radioactivities and decay heat are of significant importance in the nuclear design of a near-term D-T fusion
device from the view point of the safety consideration. In the framework of the JAERI/USDOE collaborative program on
fusion neutronics, extensive experimental efforts have been devoted to verify the validity of the calculation code systems
THIDA-2, REACT-2 and DKR-ICF. In the previous study, it was clearly pointed out that there were large discrepancies for
several important materials between the experiment and the calculation in terms of y-ray emission rates. This paper
investigated the major sources of these large discrepancies. In addition to the previous ones, the analysis was carried out by
THIDA-2 using an updated cross-section library. As a result, the followingwas pointed out: (1) The calculation of THIDA
with the new activation cross-section library gave better agreement with experiment, especially for MnCu, W, Mo and V. As
far as the higher neutron energy range above 1.0 MeV is concerned, all calculation code systems offer reasonable prediction
accuracy. (2) For MnCu, W and Ta, uncertainty in the neutron spectrum was the main source for the large discrepancies
because low-energy neutrons were very sensitive to the capture reaction products of 64Cu,lSVwand ISZTa.

  

Source: Abdou, Mohamed - Fusion Science and Technology Center, University of California at Los Angeles

 

Collections: Plasma Physics and Fusion