What does RPS mean in UNCLASSIFIED

RPS are compact, reliable power sources that convert the heat from the decay of radioactive isotopes into electricity. They are ideal for spacecraft and remote terrestrial applications where continuous power is required without access to other energy sources.

RPS offer several advantages:

• Long lifespan: RPS can operate for decades without refueling or maintenance.
• High reliability: They are highly resistant to radiation, vibration, and temperature extremes.
• Compact and lightweight: RPS are relatively small and lightweight, making them suitable for use in space-constrained environments.
• Autonomous operation: They require minimal human intervention and can operate unattended for extended periods.

The most commonly used isotopes in RPS are plutonium-238 and strontium-90. Plutonium-238 has a longer half-life (87.7 years) and higher power density than strontium-90, while strontium-90 is less expensive and easier to handle.

RPS convert heat from radioactive decay into electricity using a thermoelectric generator (TEG). TEGs are solid-state devices that produce electricity when a temperature difference is applied across them. In RPS, the heat from the decaying isotope is used to create a temperature gradient across the TEG, generating electricity.

Yes, RPS are designed with multiple layers of containment to ensure that the radioactive isotopes are securely sealed and protected from the environment. They are also subject to rigorous safety regulations and undergo extensive testing to ensure their safe operation.