The AutoPIPE methodology for calculating the missing mass effect for higher, rigid modes in a dynamic analysis is discussed in help topic “Missing Mass and ZPA Correction.” The equations presented are not the same as the Kennedy missing mass method of U.S. NRC Regulatory Guide 1.92, Revision 3. Would Bentley please demonstrate whether or not the “missing mass” methodology and equations used by AutoPIPE Nuclear are equivalent to Appendix A of RG 1.92, Revision 3?