16.2 - Severe Accident Analysis (RRC-B) - EDF Hinkley Point

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SUB-CHAPTER : 16.2PRE-CONSTRUCTION SAFETY REPORTCHAPTER 16: RISK REDUCTION AND SEVEREACCIDENT ANALYSESPAGE : 55 / 295Document ID.No.UKEPR-0002-162 Issue 04SECTION 16.2.2.1 - TABLE 10Event chronology for core melt scenarios without mitigation no PDS-line opening(MAAP 4 code) [Ref]Core oxidation onsetCore meltingStart of core relocationinto lower headAccumulator/injection/depletionMHSI/LHSI shutoffreachedVessel failureTLOFW1h20min1h40min3h29min--3h51minSB LOCA COLD LEG WITHOUT SG PARTIAL COOLDOWN3.8 cm cold leg(5 cm²)3.8 cm cold leg(11.4 cm²)5 cm coldleg(20 cm²)7.5 cm cold leg(46 cm²)5h55min 2h38min 1h32min 47min5h57min 2h40min 1h36min 50min8h04min 5h52min 3h52min 6h18min7h07min /8h46min3h10min /6h29min1h45min /6h03min4min / 3h49min6h24min /8h45min2h45min /6h28min1h27min /6h02min36min /3h49min8h45min 6h28min 6h03min 7h56min
SUB-CHAPTER : 16.2PRE-CONSTRUCTION SAFETY REPORTCHAPTER 16: RISK REDUCTION AND SEVEREACCIDENT ANALYSESPAGE : 56 / 295Document ID.No.UKEPR-0002-162 Issue 04SECTION 16.2.2.1 - TABLE 11Event chronology for core melt scenarios without mitigation no PDS-line opening(MAAP 4 code) [Ref]Core oxidationonsetCore meltingStart of corerelocation intolower headAccumulator/injection /depletionMHSI/LHSI shutoffreachedVessel failureSB LOCA COLD LEG ONLY 4 SG PARTIAL SECONDARY COOLDOWN2.5 cm cold leg(5 cm²)3.8cm cold leg(11.4 cm²)5 cm cold leg(20 cm²)7.5 cm cold leg(46 cm²)8h36min3h45min2h07min1h54min8h39min3h52min2h13min2h41min11h42min7h35min9h51min6h21min9h36min /13h20min4h / 8h12min2h13min / 9h51min57min / 4h17min23min / 13h19min 17min / 8h12min 14min / 5h24min 11min / 2h15min13h18min8h12min12h26mn7h47min
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16.2 - Severe Accident Analysis (RRC-B) - EDF Hinkley Point

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