January 17

Energy-Absorbing Mitigation Crash Pad

A Tier one supplier to the nuclear industry engaged Promation for the design, engineering, manufacturing, examination and testing of an energy-absorbing crash pad.

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The Challenge

As part of the waste processing activities at the Retube Waste Processing Building (RWPB), heavy flasks containing radioactive waste are transported using overhead cranes. Due to a potential crane failure scenario, energy-absorption systems (crash pads) were required to provide safe landing for the flasks. The challenge was to safely absorb the resulting kinetic energy of a 32,000-pound flask being dropped from a height of 23 feet. Additional manufacturability challenges resulted from the overall size of the crash pad at 14.5 feet wide by 35 feet long.

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The Solution

Promation worked closely with a honeycomb structure supplier to design and perform the required drop test analysis of the crash pad. With a total area of 500 square feet, the crash pad was carefully designed, manufactured and constructed to minimize potential cracking and undesirable stresses over such large areas. Promation also designed a custom transportation nest that was capable of properly securing the crash pad to minimize applied stresses during transportation and lifting operations. This transportation nest was compliant with ASME B30.20.

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The Benefit

This project was a critical path for the end customer’s life extension program, requiring execution within a very tight schedule. Promation successfully delivered the crash pad.

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