Safety Assessment Study in Nanoscopic Circumstances for an Accidental Cooling Loop Failure (ACLF) in a Lunar Nuclear Power Reactor (LNPR) - Atomic Nanoscale Technology in the Nuclear Industry - page 36

Initiating
Event

Response to Initiating Event Event

Sequence
Frequency
(Rx-yr)

Remarks

Accident of
cooling loop
failure
(ACLF)

Core Trip Criticality
stabilization

Geological
stabilization

Long term
cooling

0.9 1 6.75

~1

0.1

2 0.75

Yes

0.9

7.5/Rx-yr

6.8×10 -6 3

~ 1

0.1

No

7.5×10 -7

4

1×10 -6

~ 1

2.8×10 -13 5

3.7×10 -3

0.0

2.8×10 -15 6

FIGURE 4.5
Event.low.of.an.accidental.cooling.loop.failure.(ACLF).

where,. I .is.the.absorbed.solar.energy.per.unit.area.. T .is.the.absolute.surface.
temperature.(Kelvin),.ε.is.the.emissivity,.and.σ.is.Stefan's.constant,.5.67.×.10 8 .
in.metric.units.
There. has. been. some. research. into. space. risk. assessment.. Everline. and.
Paulos.(2006).studied.multiple.event.risks.in.aerospace.applications..Fragola.
et.al..(1995).investigated.the.space.station.in.a.long-term.facility.assessment..
For. space. power. using. nuclear. energy,. the. Cassini. spacecraft. mission. to.
Saturn.and.its.moon,.Titan,.carried.three.radioisotopic.thermoelectric.gener-
ators.(RTGs).and.32.8.kg.of. 238 Pu.fuel,.which.provided.total.electrical.power.
of.870.W e ..High-eficiency.thin.ilm.silicon.solar.cell.arrays.can.produce.676.
W e /kg.and.triple-junction.InGaAs.solar.cell.arrays.can.produce.360.W e /kg.
at.geosynchronous.orbit.(Fatemi.1999)..There.was.a.safety.assessment.of.the.
Cassini. mission. where. two. kinds. of. probabilistic. analyses. were. compared.
(Swaminathan.1997)..Schmitt.investigated.the.private.enterprise.to.lunar.base.
activation..The.commercial.applications.are.silicon-containing.components,.