INDC(SEC)-46/U+R+F+SIN DC INTERNATIONAL NUCLEAR DATA ...

Ill.iii
Over the next six months data requirements for interpretation
of integral experiments on LiP
systems are expected to become
apparent. Immediate data requirements are for inelastic .excitation
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cross sections to the first few excited states of F for incident
neutron energies of less than 1 MeV to 15 MeV with an accuracy of
10 to Yjfo and for partial excitation cross sections for different
modes of ^Li (n,n'a t) to interpret tritium production. A review
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of existing data for inelastic cross sections of F and theoretical
calculations for ^Li (n, n'a t) are in progress.
3. The Federal Republic of Germany:
The following comments regarding the data requests from Germany
were communicated to the Agency in 1973 by S. Cierjacks:
It has been shown 3 that in principle a large number of fusion
reactions can be considered for energy production in a thermonuclear
reactor. The three most important reactions are the
following:
D + T
D + 3 He
2D + 2D
4 He (3.52 MeV) + n (14.O6 MeV)
^He (3.67 MeV) + p (14.67 MeV)
T (1.01 MeV) + p (3.03 MeV)
3 He (0.82 MeV) + n (2.45 MeV)
Among these the D + "^He-reaction is - from a theoretical point
of view - the most, interesting process, since both reaction products
are stable charged particles. Their energy should thus be easily
utilized, and there might even be a possibility for direct conversion
of the kinetic energy to electric power. However, 3 He is a very
scarce component in the natural isotopic composition of helium, and
consideration of net power yields attainable with the above reactions
shows that this quantity for the D + T-process exceeds the yield for
the D + 3 He- and the D + D-rea,ction by two and three orders of magnitude,
respectively. Therefore, from the present stage of knowledge,
the first prototype reactor will be most probably a DT-reactor.
3 V.S. Crocker, S. Blow and C.J.H. Watson, Nuclear Data for Reactors,
(Proc. Conf., Helsinki, 1970), IAEA, Vienna, 1970, Vol. I, p. 67.