[en] The knowledge of the leakage behavior of containments beyond design conditions is required for the evaluation of severe accident mitigation strategies, risk studies, emergency preparedness planning, and siting. Since each containment building has a large number of penetrations, these represent a large number of potential leak paths from the containments. Four NRC programs - the Containment Safety Margins program, the Integrity of Containment Penetrations under Severe Accident Conditions program, the Electrical Penetration Assemblies program and the Isolation Valves program are currently in place to evaluate containment integrity and the potential for leakage beyond design conditions. This paper will summarize the details of two of these programs the Integrity of Containment Penetrations Under Severe Accident Conditions and the Electrical Penetration Assemblies. The test plan, the input loads, the number and types of penetration to be tested under these two programs will be discussed