Analysis for Characteristics of Nuclear Spacecraft in a Nanogravity Environment for Deep Space Exploration - Atomic Nanoscale Technology in the Nuclear Industry - page 52

Accident Probabilities

1. Accident Definition
- RTG Safety Databook
- Earth Swingby Plan

Accident Environments

Conditional Probabilities

2. Source Term
Determination
- Determine
RTG responses

Source Term Descriptions

3. Consequences
Evaluation
-Evaluation of
radiological
consequence

Consequences

4. Risk Analysis
- Apply accident POF to
cond. Prob.

Risk

FIGURE 5.1
Nuclear.launch.safety.risk.analysis.process.

TABLE 5.1
Missions.to.Jup iter
Spacecraft

Power LaunchDate

Pioneer.10 165.0.W.(4.SNAP,.19.RTGs) 1972-03-02

Pioneer.11 165.0.W.(4.SNAP,.19.RTGs) 1972-04-06

Voyager.1 420.0.W.(3.RTGs) 1977-09-05

Voyager.2 420.0.W.(3.RTGs) 1977-08-02

Ulysses 285.0.W.(3.RTGs) 1990-10-06

Cassini 640.0.W.(3.RTGs) 1997-10-15

New.Horizons 220.0.W.(RTG) 2006-01-19

Note: . SNAP. =. Systems. Nuclear. Auxiliary. Power. Program;.
RTG.=.radioisotope.thermoelectric.generator.

converts.temperature.differences.directly.into.electricity.(Angelo.1985)..The.
irst.RTG.launched.by.the.United.States.was.the.Systems.Nuclear.Auxiliary.
Power. Program. (SNAP). 3. in. 1961. aboard. the. Navy. Transit. 4A. spacecraft..
The. normal. application. of. RTGs. on. spacecraft. is. as. a. power. source.. RTGs.
were.used.in.Pioneer.10,.Pioneer.11,.Voyager.1,.Voyager.2,.Galileo,.Ulysses,.