1. K H N P

2. Ⅰ Primary Problems of Existing Radiation Protection Ⅱ Features of Operating RMVS Ⅲ Benefits of Operating RMVS

8. Radiation Exposure of Major Country during Outage Period(’96~’06) (Man-mSv) 2,000 1,500 1,000 500 0 Period(’96~’98)Period(’04~’06) PeriodGermanySpainUSABrazilFrenchJapanKorea ’96~’98106014001680154013501270810 ’04~’0682041011907607301290810

9. Radiation Exposure of Korea NPP for Outage Period(The past 3 years) (Man-mSv) 1000 750 500 250 0 Plant YUONGKWA NG1 ULJIN1KORI2KORI1 YOUNGKWA NG2 ULJIN2 YUONGKWA NG3 ULJIN3Average Radiation Expousre 831816662659604430336220570

32. 1,000 800 600 400 200 0 1,000 800 600 400 200 0 (man-mSv) Fifteenth(2008) Sixteenth(2010) Radiation Exposure Classification Radiation Exposure during Outage 798 571 Reduced Radiation Exposure in comparison with Pre-Operation 226 man-mSv Reduced Radiation Exposure in comparison with Pre-Operation 226 man-mSv

33. (Man-mSv) 180 140 120 100 80 60 40 20 0 Before Operation(Fifteenth Outage)After Operation(Sixteenth Outage) 내용 Reactor Assembly Disassembly Steam Generator Works System Operation In-core Thimble ISI Valve Disassembly Check Primary Pump Check Vibration Isolation Check Boron Corrosion Test LLRT Gauge Calibration RCP Check Radiation Safety Management Decontaminati on, Laundry & Radwaste Process The Other Works Total Before 72.83180.730.2135.2980.8388.234.2133.5014.309.7849.898.0366.4557.3661.82797.79 After58.86112.4725.9836.3463.8173.654.3215.626.897.9028.818.9713.7619.4194.97571.76 Radiation Exposure -66.95-68.23-4.231.55-17.02-14.580.11-17.88-7.41-1.88-21.080.94-52.69-37.9533.15-226.03 571.76 The Lowest Level since the First Operation!!

34. The number of Entrance(Persons) 30,000 25,000 20,000 15,000 10,000 5,000 0 OutagePersonsDays 15th22,62131 16th23,84233 Outage Periods(Days) 36 30 24 18 12 6 0 Before(Fifteenth Outage)After(Sixteenth Outage) Personal Average Radiation Exposure 0.035 0.030 0.025 0.020 0.015 0.010 0.005 0 OutagePersonal Average Radiation Exposure(mSv) 15th0.035 16th0.023 Before(Fifteenth Outage)After(Sixteenth Outage)

35. 100 80 60 40 20 0 100 80 60 40 20 0 (man-mSv) ’08.01.01 ~ 03.25 ’09.01.01 ~ 03.25 Radiation Exposure 구 분구 분 구 분구 분 Radiation Exposure in High Radiation Area 22.08 7.54 Yearly Calculation 88.32 30.16 Reduced Radiation Exposure in comparison with Pre-Operation 58.16 man-mSv Reduced Radiation Exposure in comparison with Pre-Operation 58.16 man-mSv

36. (Man-mSv) 12 10 8 6 4 2 0 Before(2008.01.01~03.25)After(2010.01.01~03.25) Classification System Operation Radiation Safety Management Radwaste Process Decontamination & The Other Works Total Yearly Calculation Before 5.034.5510.711.7922.0888.32 After1.870.574.500.607.54 30.16 Dose Difference -3.16-3.98 -6.21 -1.19-14.54 -58.16