Strategy for Steam Generator Tube Rupture Accident with Total Loss of Pressurizer Spray

Typical cases of SGTR accident under total loss of pressurizer spray with or without application of the strategy are analyzed using CATHARE code,and the accident scenario and results are discussed in detail.In addition some sensitivity study on number of ruptured tubes and initial power level are done and finally the possible negative effects are discussed.The analyses demonstrate that the strategy of pressurizer relief proposed by the document can significantly reduce the contaminated water and steam release to environment for SGTR accident under total loss of pressurizer spray,and the negative effect can be neglected.