Summary Report for Conduct of Kozloduy NPP Stress Tests

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“Kozloduy NPP” PLC SUMMARY REPORT for Conduct of Kozloduy NPP Stress Tests 6.3.1 Radioactive releases after loss of containment integrity at Units 5 and 6.......................190 6.3.2 Accident management after uncoverage of the upper part of fuel in the SFP of Units 3 and 4 192 6.3.3 Accident management after uncoverage of the upper part of fuel in SFP of Units 5 and 6 193 6.3.4 Accident management after uncoverage of the upper part of fuel in the SFS pool .........194 6.3.5 Radioactive releases from dry spent fuel storage...........................................................194 6.3.6 Measures which may be envisioned to improve possibility for localization of radioactive substances releases .......................................................................................................................194 6.4 CONCLUSION....................................................................................................................195 7 LIST OF REFERENCES...............................................................................................196 7/202
“Kozloduy NPP” PLC SUMMARY REPORT for Conduct of Kozloduy NPP Stress Tests List Of Tables Table 1.3-1: Main data of Units 5 and 6............................................................................... 26 Table 1.3-2: Historical data for Units 5 and 6. ..................................................................... 26 Table 1.7-2: Level 1 PSA results. ........................................................................................ 61 Table 3.4-1: Condition of different buildings and facilities at flooding with MWL presented in the sequence of flooding.................................................................................................... 122 Table 4.1-1: Frequency of occurrence of extreme meteorological conditions. .................... 127 Table 4.2-1: Wind load...................................................................................................... 128 Table 4.2-2: Snow load...................................................................................................... 128 Table 5.1-1: Assessment of time period to fuel damage at loss of normal and standby power supply and failure to emergency DGs. ............................................................................... 141 Table 5.1-2: Assessment of time period to fuel damage at loss of normal and standby power supply, failure to all emergency DGs, failure to additional DG. ......................................... 144 Table 5.1-3: Assessment of time period to fuel damage at loss of normal and standby power supply, failure to all emergency DGs, failure to additional DG, failure to mobile DG. ....... 145 Table 5.1-4: Assessment of time period to fuel damage at initiating events with loss of ultimate heat sink. ................................................................................................................... 150 Table 5.1-5: Assessment of time period to fuel damage at initiating events with loss of power supply and ultimate heat sink............................................................................................. 153 Table 5.2-1: Time to occurrence of the main events in SFP in case of complete loss of alternate current power supply........................................................................................... 154 Table 6.1-1: General time schedule for emergency measures implementation.................... 166 Table 6.1-2: Types of training, exercises and participants .................................................. 171 Table 6.1-3: Emergency conditions and relevant measures. ............................................... 177 Table 6.2-1: Time margin between shutdown of the reactor and core melting. ................... 189 8/202
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Summary Report for Conduct of Kozloduy NPP Stress Tests

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