In-pile life tests of cylindrical thermionic converter rods for Mark 

Holland, J. W.

Kay, J.

Schwarzer, D. E.

Yates, M. K.

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https://ntrs.nasa.gov/search.jsp?R=19690003658 2020-03-12T08:12:41+00:00Z


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TABLE 1 
IN-PILE TEST SUMMARY 
Average 
Eloetmds Avemge 
P-r Pmlttsr Plnsl F l ~ l  Test 
mnalty Tppersturs Relative Relative Temimtlon %mu9 rest Collector h l  Rwr. (V/rm2) ( C) Pwer Efficiency b t e  ( t l e t )  milure ~ o d s  m t t e r l  
IC4 w / w  9ovc-lnzrc l d  7.3 1760 0.80 0.65 4/19/& Mol9 Envelope leak-not Sound 
IC-7 w/Ko w - 1 m r C  520 6.C 1720 0.90 0.80 6/28/64 NC Envelope leak-no port- OpeI'9tlOMl 
K C 5  
IC-9 
IC-10 
IC-ll 
IC-12 
IC-13 
IC-lk 
IC-1s 
1552 6.3 
Uag 6.0 
1552 6.9 
2506 6.9 
3300 6.2 
17% 4.5 
1328 1.0 
1650 
lodo 
1650 
1693 
1670 
14% 
162U 
1732 
0 . b  0 . 3  
0.90 0.80 
0.60 0.45 
0.80 0.69 
0 . b  0.50 
0.70 0.50 
0.95 0.65 
1.10 1,Ol 
Envelope leak-not found 
Ravelopa leak-not found 
Envelops leak-not found 
Ian--contmctual cmalttmnt 
short dw to  g d b  on emitter 
m~mlopa lek-not  found 
mvalopo loak-no post- 
O p ~ t i O ~ ~ l  
short dun to get l r r  r i r q  5369 10.0 
U d
0 .z 
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5 
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TABLE 2 
@A'-OF-PILE TEST J W R Y  
Lc-\I upo -- 7 3 5  8.7 1750 1.00 1.00 11/W55 
LC-5 u+ pove-ioe~c 7558 8.6 1750 0.85 0.85 12ji%j€5 
LC-6 u p  m - w z f c  2803 4.8 16650 1.18 1.13 S/lO/€% 
Lc-1 u/Ab -- 3671 6.7 1Bo3 0.93 0.9 7/13/67 En~lops leek - Cu-Nb veld i n  
ceslup~ resorvolr 
lc.9 .u/m -- 93.53 7.9 1700 1.01 1.m 
a 
f 1 4  I: 
I IC.6 * REL&71YL PQWZR 
A RELATIVC IFFICILHCY 
0 
I 
I I 
1 4 IC-14 
Pr AUO r ,  
NORUALIZEO 
I 
00 500 I000 I500 2000 2500 3000 3500 
OPLRLTIHG TIWE (HR) 
Fig. $-Relative power and eff ic iency of  carbide fueled in-pi le  converters 
0 1
I------ 
------ 1 -_---- 
LE-3 D I T A  
ENVELOPE 
I I 
0 1000 2000 3000 4000 5000 6000 7000 9000 8000 IO.( 
OPERRTING T I M E  (HR: 
Fig. a--Coaparison of out-of-pile r e l a t ive  power data p r io r  t o  cesium leakage 


Long term operations of in-pile and out-of- pile thermionic converters, parts 1 and 2

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