The document discusses different power generation technologies, including conventional nuclear fission which produces high power in megawatts but requires large steam turbines, and betavoltaic batteries which produce power in nano-milliwatts but are small and conventional. It then proposes combining fission and betavoltaics by using a graphite moderating material with uranium-235 to generate power from fission, and nickel-63 to generate power from beta radiation through a semiconductor design, allowing for high power output in a small form factor.

1. Arc Reactor Technology:
Presented by – sagar Kishor savale
HighPower–to–WeightRatioforPropulsion

2. Conventional Nuclear Fission:
High Power in MegaWatts, Use of Steam Turbine, Too big
Steam turbine
Secondary loop and electric
Control rod
Uranium
fuel element
Reactor
core
Molten sodium
or liquid water
under high
pressure (carries
energy to steam
generator
Cold water Warm water
generator
)

3. Betavoltaic Battery:
in nano-milliWatts
Conventional
Small, Power

4. Typical Betavoltaic Battery
2.5[jCi
1mCi/cm
2
in 500[jm
Ni-63
source
Mesa-isolated
diode
n-sid
p-substrate
i
1
square
e

5. Combining Fission and Betavoltaics:
Sagar savale
["
I
n-doped semiconductor
Graphite = Moderating material
Uranium-23
p-doped semiconductor
["
5
n-doped semiconductor
Nickel-6
Graphite = Moderating material
Nickel-63
p-doped semiconductor
3