Assessment of the power balance in fusion reactors

Nozawa, M.; Steiner, D.

doi:10.2172/4385192

Cited by 6 publications

(4 citation statements)

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“…This result is based on work reported in Ref. [24] and is discussed in more detail in Appendix I. Based on recent studies [25] we have assumed an average energy production rate of 21 MeV per fusion event.…”

Section: Resultsmentioning

confidence: 99%

“…a reactor for which the burn time is much longer than the start-up time. Nozawa and Steiner [24] define Q^. as the Q necessary to breakeven in a power plant when all efficiencies are accounted for.…”

Section: Discussionmentioning

confidence: 99%

“…From a simple energy balance, they find (l+x)n a V t where n t is the thermal efficiency, r^ is the efficiency of the beam injection system, r) a is the efficiency with which the beam energy is absorbed in the plasma, and X is the ratio of the power for Assuming, as in Ref. [24], that rj a = 0.…”

Section: Discussionmentioning

confidence: 99%

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The potential of driven tokamaks as thermonuclear reactors

Conn

Kesner

1975

Nucl. Fusion

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Unignited, and therefore externally driven, tokamak plasmas can be the core for economic tokamak power reactors over a significant range of machine sizes where the plasma amplification factor Q exceeds 15. In such driven systems, high-Z impurity levels from 2 to 4 times that in ignited plasmas can be tolerated. Large driven tokamaks with plasma currents greater than 4 MA achieve the highest Q-value by operating with a 50-50 D-T plasma using the minimum amount of injected power to maintain the plasma in energy equilibrium. Driving large tokamaks with injection can also be used to extend the reactor burn time should impurities accumulate. For smaller tokamaks, the optimum Q is obtained by injecting deuterium neutral beams at maximum power onto a pure tritium plasma and operating the device in the two-energy-component mode described by Dawson, Furth and Tenney. A natural connection between these two operating modes is thus obtained. The potential benefits of low-Z liners in tokamaks are also studied and it is found that the tolerable impurity level of a contaminant like carbon can be an order of magnitude larger than the tolerable level of impurities like Fe or Mo.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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The potential of driven tokamaks as thermonuclear reactors

Conn

Kesner

1975

Nucl. Fusion

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“…The behavior for different types of SiC materials was analyzed in terms of radiation enhanced deuterium absorption. In JA, inter-laminar strength anisotropy at high temperature was obtained for SiCf/SiC composites [12]. A set of lifetime properties at high temperature was also evaluated.…”

Section: Sicf/sic Compositesmentioning

confidence: 99%