How can CAESAR II 4.40 SAFETY RELIEF VALVE FLOW INDUCED VIBRATION CALCULATION USING THE FOLLOWING:

This calculation is base on the paper presented by H.R. Simmons and R.M. Baldwin of the Southwest Research Institute and a simplified
design procedure to determine the internal profile dimensions for the SRV Vesselot to control flow induced vibration for steam service.
Input Parameters

Specific Heat Ratio k is from the ASME Steam Tables (Graph attached)
Gas Constant R = 85.76*32.2 = 2761.56 sq ft/sq sec - deg R
Nozzle throat dia & length from WFI drawing #'s 0595-001 & SVV1405.500
Flow Velocity, temperature, & wall thicknesses from design calculations
Relief valve lengths from Dresser


Calculations

Sonic Velocity = sqrt(k*R*T) ft/sec
Mach Number = flow velocity/sonic velocity
L/d ratio = See figure 1 WFI procedure
Frequency f = sonic velocity/4 *L
Strouhal number = f*d/flow velocity

The calculations show all of the relief valve installations on TNP Unit #1 to be above the problem region described in Fig 8 of the
Southwest Reasearch Institute paper and above a shrouhal number of .54