Following [Santarius and Logan, 1998], a value of 1,000 kg/kW for the mass per unit heat pumped is assumed (one order of magnitude lower than the presently available systems). Cryoplant power is determined by nuclear heating of the magnet:
with A„ « 0.13 m being the neutron mean free path in the blanket; and f the fraction of fusion energy associated with neutrons. The cryoplant mass is therefore given by
Mcryo = /„Pfus(rp/O exp(-(rm - rp)/A„) x 103 kg/kW — PfuS/«cryo (B.17) B.2.4.4 Blanket
An optimized blanket made by LiH has been proposed in [Kulcinski et al., 1987] with a density in the range 103 kg/m3 [Santarius and Logan, 1998], much less than the value ~104 kg/m3 for the solid and liquid blankets envisaged for a fusion reactor. The blanket mass is given by
Ms = Ps(1 - rp/rm) V = Ps(rm/r;; - 1)PfuS/PSpec — PfusM (B. 18)
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Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.