Russian Nuclear Submarine Accidents Survey

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Russian Nuclear Submarine Accidents Survey

  1. 1. Russian Nuclear Submarine Accidents Survey Ole Reistad Norwegian Radiation Protection Authority 1
  2. 2. Russian Nuclear Submarine Accidents Survey Ole Reistad Norwegian Radiation Protection Authority
  3. 3. All safety-related events 1958–2007 (annual/ cumulative (right axis)) distributed by vessel category 140 14 120 12 100 10 80 8 60 6 4 40 2 20 0 1959 1965 1971 1977 1983 1989 1995 1. gen submarines 2. gen submarines 3. gen submarines 2001 0 2007 LMC 3 No. of safety-related events (cumulative) (right y-axis) Number of events 160 16 Number of events 18
  4. 4. All safety-related events 1958–2007 distributed by safety significance (1–7) (left axis) and events with release of radioactivity (cumulative) (right axis) 18 30 16 25 12 20 10 15 8 6 10 Number of events Number of events 14 4 5 2 0 1959 0 1965 1 1971 2 3 1977 4 1983 5 1995 2001 0 2007 1989 Year 7 Events with release of radioactivity (accumulated) 4
  5. 5. 150 100 50 2007 2001 1995 1989 1983 1977 1971 1965 0 1959 In-service years (annual) 200 Operational years (cumulative) Annual (left) and cumulative (right) vessel-operatingyear (VOY) for Russian nuclear submarines 6000 5000 4000 3000 2000 1000 0 1 6 11 16 21 26 31 36 41 46 Year Year 1. gen (VOY) 2. gen (VOY) LMC (VOY) All classes (total VOY) 2. gen (VOY) 1. gen (VOY) 3. gen (VOY) 3. gen (VOY) LMC (VOY) 5
  6. 6. 80 0 60 0 30 0 10 0 12 12 10 10 6 4 2 Number of vessels 8 0 Vessel operating days 3 0 0 -1 0 0 6 0 00 -4 0 00 9 0 0 00 00 0 1 2 0 00 7 00 0 -1 00 0 1 5 00 0 00 0 0 -1 0 0 1 8 00 0 3 00 0 -1 00 2 1 00 0 6 00 0 -1 00 2 4 00 0 9 00 0 -2 00 2 7 00 0 2 00 0 -2 00 3 1 00 0 5 00 0 -2 00 3 4 00 0 8 00 0 -3 00 3 7 00 0 2 00 0 0 -35 00 0 0 00 -3 00 80 00 0 10 00 11 00 -1 20 13 0 00 -1 40 15 0 00 -1 60 17 0 00 -1 80 19 0 00 -2 00 0 90 0- 70 0- 50 0- 20 0- 0- Num ber of vessels Vessel operating days (left) and distance (right) for first-generation vessels 8 6 4 2 0 Vessel distance traversed (miles) 6
  7. 7. Safety-related event rate (events (annual)/ VOY (annual)) Safety-related event rate (annual) - annual number of events/ annual vessel operating years (all vessel classes) 0.6 0.5 0.4 0.3 0.2 0.1 0.0 1959 1979 1999 Year 1. generation vessels 2. generation vessel 0.6 0.5 0.4 0.3 0.2 0.1 0.0 1959 1979 1999 Year 3. generation vessels LMC vessels 7
  8. 8. Mean-time between safety-related events, 1959–2007 (left) and 1959–1984 (right) with confidence interval 1000 MTBF (in-service years) MTBF (in-service years) 1000 100 10 1 100 10 1 100 1000 VOY (years) 10000 100 1000 10000 VOY (years) 8
  9. 9. Mean-time between safety-related events involving the release of radioactivity with confidence interval MTBF (in-service years) 10000 1000 100 10 100 1000 VOY (years) 10000 9

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