Kilowatt Isotope Power System, Phase II Plan. Volume IV. Teledyne FSCD vs GDS Page: 111 of 264
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TABLE 2.5.2.6-r1n
FAILURE MODE AND EFFECTS ANALYSIS
CRITICALITY RANK C x ( =
FE RANK
1) FM LIKE LIHOOD
POSSIBLE
FAILURE MODES FAILURE DESIGN SAFETY
NO. CO'.'PONENT & FUNCTION (FM) CAUSES FAILURE EFFECT (FE) CONSIDERATIONS1.0
Structural failure
Handling damage,
launch or transport
dynamic forcesTwisted/distorted radiator
resulting in a coolant sys-
tem leakAll basic structural type static
components having no moe ig
or operating parts.
Experience data and Q. C.
controllable5
1
1
1
100
{500
1. 1
1.2
1.3P ' ator
Provides for waste heat rejec-
ce on to ipace from circulated
flu as
Structu-al Parts
Skin, splice plates, fittings,
channel frames, angle frames,
and itcoroid shield, rivets,
v c'ls
L-i , <c Coa rg
Improve heat rejection charac-
teristics (high emissivity and
low solar absorptivity
Conlr 1 ies. Coolant 'lamfolds
ani Conn ctimt' Iuhes
90 uclds - maximum length -
approyimatcly 1.5"
Appror -Latcly 150 ft of 0. O65
I. L tuwng
Approcimately 25 ft of 0.50 L D.
tubingFatigue, material de-
fect, defective weld
Moteo oid Penetration4- 4
Clogged or partially
clogged linoI ____________ S
Corrosion of tubing
intersurface, spall-
ing upstream,
meteoroid dentLeakage resulting in loss of
cooling fluid. System over-
heats and over temperature
shutdown (aluminum foil
melts)
Potential fire hazard in
ground operationLose part of cooling sur-
faceVacuum leak checi ed
Radiograph inspection of Melds
06i/ 065 wall al alloy tubing
063 al alloy met.roid shields
for tube header protection
Don them A has narroN flame-
ability limits - low explosion
probabil tyFilters down-stream
50
50
100
50
500
2,500
--I,
Loss of coating Dynamic I nviron- Significant reduction in Dynamic and vacuum tests 5 50 250
ments - shock, radiation heat rejection
vibration
Vacuum vaporization
Chipping Thermal cycling Partial reduction in ra- Surface may be cleansed and 10 50 { 500 I
diator heat rejection refinished
Bending and torsion
loading during
handing
Improper coating
application
Environments -
humidity, salt air,
ultra violet light
Cracking Same as chipping Minor effect on heat re- 5 50 250
ject ion
Degradation Solar absorptivity Significant reduction in 10 50 500
radiation heat rejectionRupture in tube wall
or weld leak failure
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Kilowatt Isotope Power System, Phase II Plan. Volume IV. Teledyne FSCD vs GDS, report, March 15, 1978; Timonium, Maryland. (https://texashistory.unt.edu/ark:/67531/metadc1055866/m1/111/?q=%22~1%22~1&rotate=270: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.