1. Introduction 2. Influence of Spplication of HVL and TVLin Evaluating Shielding Performance 2.1 Shielding Status of Waste Sealed Source 2.2 Basic Information of Shielding PerformanceEvaluation 2.3 Variation of Linear Attenuation CoefficientBetween HVL and TVL 2.4 Evaluation of Shielding Performance by ApplyingLinear Attenuation Coefficient 3. Application of Linear AttenuationCoefficient REFERENCES