| 21. | Nuclear proponents have tried to regain public support by offering newer, safer, reactor designs.
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| 22. | Pyongyang says it does not recognize South Korean reactor designs.
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| 23. | Speculation had arisen after another scientist went public saying his reactor design was rejected.
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| 24. | For any given reactor design, there is a limit to the beta it can sustain.
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| 25. | However, Marviken's reactor design was found to be poor and work was abandoned in 1970.
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| 26. | Computer modelling and confidence in new reactor designs meant testing would no longer be necessary.
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| 27. | Many more recent reactor designs have been proposed, most of which include passive safety systems.
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| 28. | It continues to be a rigid requirement for all US reactor designs to this day.
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| 29. | He also taught the graduate course on reactor design.
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| 30. | Fission fragment reactor designs generally have several common components.
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