| 摘要 |
A spring set within a control rod guide tube in a nuclear reactor biases a control rod for movement into the reactor core. The spring set includes at least three springs in series, two being under compression and one in tension. The control rod may be displaced downwardly in a direction away from the core by a cable connected at one end to the control rod support element and at its opposite end to a drum. By winding the cable on the drum, energy is stored in the spring set. During a SCRAM, the drum is released, enabling the spring set to rapidly displace the control rod fully into the core.
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