Background: Steel Containment Vessel（SCV） penetrations are special parts in nuclear plant.The analysis method and acceptance criteria of SCV penetration are different from piping.The analysis method and acceptance criteria for SCV penetration of CAP1000 plant are required.Purpose: To set the analysis method and acceptance criteria for SCV penetration.And base on these calculation and evaluation method

make a program for the penetration calculation and evaluation that is automatic

rapid and easy to use.Methods: The development of this program is based on the research and contrast.The axisymmetric penetration model with nonaxisymmetric loading is established in this program.The two sides loads combination of penetration is considered in this program.The stress is calculated by ANSYS 11.0;preprocess is developed by VB and post-process is done by Excel.Results: The analysis method and acceptance criteria of SCV penetration are established

and a program for the penetration calculation and evaluation is developed which is automatic

rapid and easy to use.Conclusions: The analysis method and acceptance criteria of SCV penetration and the program for the penetration calculation and evaluation in this paper are reliable.By this program

the high speed and accurate penetration analysis will be expected.