Dynamic balancing is an effective measure for adjusting an unbalanced fan rotor mass to within its allowable limits. This is a typically implemented method used in nuclear power plants for resolving fan rotor unbalance conditions.

The operating spectrum of L9DVN272ZV has always been the fundamental component of the vibration frequency since finding the fan high vibration. This paper discusses the balance process of the subject fan. The vibration data collected was evaluated to aid in selecting the proper method of vibration attenuation. Ultimately the fan vibration was reduced to within the specified allowable limits.

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