1. Surface Power – PDR John Dankanich (2-13-01)
Dispersion Fueled 100 kWe Reactor

2. Assumed 500 M from Routine Activity
System Dimensions
Assumed 500 M from Routine Activity

3. Total Mass is Approximately 3,000 Kg.
Mass Breakdown
Total Mass is Approximately 3,000 Kg.

4. Cost Analysis Cost of Complete System: $750 Million • Production
• Development
• Production
• Testing
Each additional unit $250 Million
• High Cost due to testing

5. Risk Assessment
Radiation: Over 500m Distance for routine crew activity
Radiation below acceptable occupational dosage
Failure: Single Failure Modes are Difficult to Eliminate
History - 3 Nuclear Incidents in 19 US missions
Transit-5BN-3, Nimbus, Apollo 13
Snap-10A Reactor Failure
Terrestrial Plant 1/17000 Reactor Years

6. Comparisons Existing Space Power • Heavier, Lower Shielding
Terrestrial
• Lighter, Smaller, Passive
DRM
• Lighter, Lower Power
Dr. Zubrin
• Comparable Mass, Comparable Power

7. Bottom Line • Cost of $750 Million ($250 Million per additional unit)
• Reliability of 0.95 (0.98 after prototype)
• Power Output 100 kWe (115 capable)
• Lifetime of 5 years (7 max)
• Mass of 3 Tonnes
• Footprint of 13 m2