4. METHOD OF SOLUTION
The fracture mechanics analysis in NRCPIPES is based on J-integral estimation schemes, the R6 Option 1 method, the SC.TNP, SC.TKP, and SC.ENG J-estimation scheme methods developed at Battelle, and the Battelle Dimensionless Plastic-Zone Parameter (DPZP) method. The ASME allowable calculations are based on Rules of ASME Section XI, Division I, Appendices H and C and on Code Case N-494-2 of the Acceptance Standards of IWB-3514.2, Section XI, Division I, ASME. The original Net-Section-Collapse (limit-load) analysis is also included. The software is constructed in a modular manner.