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200 200 400 400 600 600 800 800 1,000 1,000 1,200 1,200 1,400 1,400 1,600 1,600 Time (Seconds) Time (Seconds) 400 400 400 600 600 600 800 800 800 1,000 1,000 1,000 1,200 1,200 1,200 1,400 1,400 1,400 1,600 1,600 1,600 1,800 1,800 1,800 2,000 2,000 2,000 2,200 2,200 2,200 2,400 2,400 2,400 RCS Pressure (PSIA) RCS Pressure (PSIA) RCS Pressure (PSIA) 200 200 400 400 600 600 800 800 1,000 1,000 1,200 1,200 1,400 1,400 1,600 1,600 Time (Seconds) Time (Seconds) 200 200 400 400 600 600 800 800 1,000 1,000 1,200 1,200 1,400 1,400 1,600 1,600 Time (Seconds) Time (Seconds) 400 400 400 600 600 600 800 800 800 1,000 1,000 1,000 1,200 1,200 1,200 1,400 1,400 1,400 1,600 1,600 1,600 1,800 1,800 1,800 2,000 2,000 2,000 2,200 2,200 2,200 2,400 2,400 2,400 RCS Pressure (PSIA) RCS Pressure (PSIA) RCS Pressure (PSIA) 400 400 400 600 600 600 800 800 800 1,000 1,000 1,000 1,200 1,200 1,200 1,400 1,400 1,400 1,600 1,600 1,600 1,800 1,800 1,800 2,000 2,000 2,000 2,200 2,200 2,200 2,400 2,400 2,400 400 400 400 600 600 600 800 800 800 1,000 1,000 1,000 1,200 1,200 1,200 1,400 1,400 1,400 1,600 1,600 1,600 1,800 1,800 1,800 2,000 2,000 2,000 2,200 2,200 2,200 2,400 2,400 2,400 RCS Pressure (PSIA) RCS Pressure (PSIA) RCS Pressure (PSIA) 32 16 18 20 22 24 26 28 30 Core Mixture Level (Ft) 32 16 18 20 22 24 26 28 30 Core Mixture Level (Ft) 450 500 550 600 650 700 750 800 850 Upper Plenum Vapor Temperature ( F) 450 500 550 600 650 700 750 800 850 Upper Plenum Vapor Temperature ( F)

Top of the Hot Legs Bottom of the Hot Legs Top of the Fuel Top of the Hot Legs Bottom of the Hot Legs Top of the Fuel

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Chapter 15: Accident Analyses

• Assumptions and inputs (table 15.0.3-2a/b)
• Computer codes and initial conditions summary (table 15.0.3-3)
• Trip setpoints and time delays (table 15.0.6-1)
• Systems and Equipment Available for Transients and Accidents (table 15.0.8-1)
• Source Term (table 15.0.9-1)
• Atmospheric Conditions (table 15.0.12-1)
• Single Failures Assumed in Accident Analyses (table 15.0.13-1)

Chapter 3: Design of SSC

• Classification
• Misile Protection
• Seismic Design
• Environmental Design
• Flooding, Wind, etc.

Support Systems

• Chapter 7: Instrumentation and Control (RTS and ESFAS)
• Chapter 8: Electrical Systems
• Chapter 9: Auxiliray systems
• Chapter 10: Steam and Power Conversion systems
• Chapter 11: Radioactive Waste Management

Chapter 6: Engineering Safety Features

• Containment
• ECCS (SI and RHR)
• MCR Habitability Systems

Chapter 2: Site Characteristics Chapter 4: Reactor (T&H Design) Chapter 5: RCS

Chapter 13: Conduct

• f Operations

Chapter 14: QA

Organizational Training Emergency Planning Review and Audit

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Accident: Main Steam Line Break (MSLB) USAR: Chapter 15.1.5 and 6.2

SLB Core Response SLB CNT Response EQ

Calcnotes NPSH from RWST to CI pump CI pump NPSH from CNT sump SLB MER

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LB LOCA CI Actuation Times

Break size Power Level DEPSG(1) 102% DEPSG(1) 102% SI MIN MAX CI spray 1 1 CI Actuation Time 55s 55s RCFC 2 4 RCFC Actuation Time 39.5s 39.4s Peak Pressure 2.83kp/cm2 2.83kp/cm2 Time to Peak Pressure 11.8s 11.8s

(1)Double Ended Pump Suction Guillotine LOCA

MSLB CI Actuation Times

Break size Power Level 0.129m2 102% 0.129m2 70% 0.129m2 30% 0.129m2 0% 0.01066m2 102% 0.0439m2 70% CI spray 1 1 1 1 1 1 CI Actuation Time 81.1s 80.9s 75.2s 76.5s 151.0s 247.4s RCFC 2 2 2 2 2 2 RCFC Actuation Time 39.5s 39.4s 39.4s 39.3s 44.2s 46s Peak Pressure 2.86kp/cm2 2.91kp/cm2 2.89kp/cm2 2.90kp/cm2 2.31kp/cm2 2.01kp/cm2 Time to Peak Pressure 148s 172s 158s 225s 1200s 450s

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Figure 1 Criteria for CI pumps stop - MSLB

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Figure 2 Criteria for CI pumps stop - LOCAs

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Hydrogen Evaluation

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Reference: Hydrogen Distribution in NPP Kr!ko Containment Report number (NEK ESD TR 13/10), D. Grgic and T. Fancev (FER)

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Hydrogen Evaluation

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Analysis - Results

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5/DD347

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