Pressure Vessel Research Committee PVRC

In 1945, the Pressure Vessel Research Committee (PVRC) was organized by engineers associated with the ASME Boiler and Pressure Vessel Committee. Its purpose was to seek answers to pressing questions concerning materials, design and fabrication of pressure vessels. 

A. The material used to manufacture the flywheel of the reactor coolant pump motor will be produced by a commercially acceptable process that minimizes flaws, such as the vacuum melt and degassing process. This provides adequate fracture toughness properties under reactor operating conditions. The acceptance criteria for flywheel design will be compatible with the safety philosophy of the Pressure Vessel Research Committee (PVRC) of the Welding Research Council (WRC) primary coolant pressure boundary criteria as appropriate considering the inherent design and functional requirement differences between the pressure boundary and the flywheel. 

The Pressure Vessel Research Committee (PVRC) recommended an interim position on damping values that are dependent on piping modal fre(juency. The American Society of Mechanical Engineers (ASME) incorporated the PVRC damping position (Code Case N-411) in Section III of the ASME Boiler and Pressure Vessel Code (Reference 4). 

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