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 42

Criticality

Production

Loss

+

+

+

+

Xenon production

Neutronic aspect

Power peak

+

+

Safety margin

Accident of cooling
loop failure

+

+

Power
malfunction

Output

Input

+

+

+

ermohydraulic aspect

+

+

Primary loop failure SG failure

+ +
+

+

+

+

+ + +

+

Physical
Property

Irradiation
Embrittlement

ermal
Embrittlement

Corrosion Wear

Fatigue

Creep

FIGURE 4.10
Accidental.cooling.loop.failure.

of.the.event.lows.by.the.feedback.and.time.delay,.which.are.combined.with.
the.time.step..The.geological.stabilizations.are.especially.stressed.by.the.low-
gravity,.nonatmosphere.environment..The.detailed.explanations.are.shown.
in.the.captions.of.each.igure..The.chance.value.is.given.in.Table 4.2.where.
the.values.of.the.basic.elements.are.given..For.example,.the.physical.property.
has.accumulation.values.with.the.initial.value.of.1..The.time.step.leads.to.the.
accumulated.value..The.time.step.and.accumulation.value.are.the.same.as.
0.25;.that.is,.the.0.25.is.accumulated.in.every.time.step.for.the.case.of.physi-
cal.property..In.irradiation.embrittlement,.the.value.is.the.summation.of.1.1.
in.every.time.step.with.the.initial.value.of.0..In.xenon.production,.when.the.
random.number.is.lower.than.0.5,.the.chance.value.is.0..If.it.is.higher.than.
0.5,.the.value.is.1.