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Project References

The vibration status of sw pumps of Almaraz nuclear power plant Learned lessons

The SW Essential Services Pumps of the C. N. Almaraz, since their commissioning, have been presenting episodes of very random vibration levels. hese vibration levels, controlled by the established surveillance and monitoring program, have been kept, at all times, below the predetermined Failure Levels. This has required, in certain cases, mechanical actions aimed at introducing (within limits) slight changes in the “dynamic stiffness” of the Motor-Pump assembly. Two consecutive events (September 2015, and January 2016) led to the establishment of a surveillance and monitoring plan for the vibrational behavior of all these units. C.N. Almaraz proceeded, in addition to an electro-mechanical review of all the drive motors, to the “continuous monitoring” of the vibration levels in the five units from February 2016 to the present. During this period, and fundamentally in Unit SW1-PP01B, regardless of the motor installed, once all of them have been reviewed, “excursions” of global vibration levels have been observed, as well as “cycles or amplitude changes” related to the day / night temperature changes. This behavior led CNA to open a “specialized investigation” on this behavior, as a preliminary phase for the establishment of a Definitive Corrective Plan. In the present work, the most outstanding technical aspects of this research are detailed, which has allowed for a precise diagnosis of the problems of these units that has facilitated the establishment of control actions and that have made the current global vibration levels, in all of them are between 2-4 mm / s (0-p), and below. Likewise, to be able to have a Proposal of Actions for the definitive correction of the observed problem and that has been experimentally validated.

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OCEANS 2024 | TSI presents cutting-edge technology to combat underwater noise in Halifax

We are pleased to inform that TSI, through its R&D&I Director Santiago Molins Riera, has recently participated in the #OCEANS2024 Congress held in Halifax (Canada) between 23-27 September 2024, with the technical paper ‘A Quick and Technically and Economically Feasible Response on Reducing the Underwater Radiated Noise (URN) by Existing Ships…’. It presents a quick, technically and economically feasible proposal for the reduction of URN produced by ships. Read on it!

TSI RENEWS ITS SERVICE SUPPLIER CERTIFICATIONS FOR THE 12TH CONSECUTIVE YEAR

For twelve years TSI has been certified as a Service Supplier of the Classification Society Bureau Veritas, being the first company authorised to carry out vibration and noise measurements to obtain class notation in accordance with the standard: “Classification of Steel Ships, Part E, Chapter 6 Comfort on Board”.