James, John T.

NASA Technical Reports Server

Whole
 Orbit
   
 
Fr
of air in 5
backgroun
module ai
2.73 days 
as a line p
samples (o
concentra
Concentra
the offgas
in the can
and chloro
 A
T units). A
0.025) + (
constraint
the test w
module w
floating p
 
------------
John T. Ja
NASA Ch
 
 Module
al D-1 M
     
om March 2
00 ml evacua
d sample wa
r were taken 
later, and aga
urge and was
ne backgrou
tions. Table 2
tions (SMAC
 test only the
isters to valid
benzene, 94
nalytical data
nalyses of p
16.3 x 0.018)
s on crew op
ere trimethyls
ith no specia
articles shoul
----------------
mes, PhD 
ief Toxicolo
 Offgas T
odule 
0 to March 25
ted canisters 
s acquired fro
in triplicate o
in 4.73 days
 not analyzed
nd and 3 pair
 gives the T 
s) and Table
 7 day SMAC
ate analytica
%.  
 contained in
airs of sampl
]/0.71 = 0.51
erations at the
ilanol, acetal
l protection a
d still be foll
----------  
  
gist 
est Rep
, 2013 a che
from the seal
m the facilit
nce the modu
 from the star
, and two of 
s) are reporte
values indexe
 2A gives T v
s are relevan
l integrity we
 Table 2 show
es that were t
 T units.  Thi
 time of first
dehyde , and
gainst volatil
owed. 
ort: 
mist from the
ed Orbital D
y near the mo
le had been 
t. Of the sam
the latter sam
d in the appe
d against 7-d
alues indexe
t. The averag
re as follows
 that the am
aken during t
the pa
per da
0.018 
t = 4.7
eviden
of the
launch
on the
as a w
value 
s T value is w
 entry. The p
 hexamethylc
e pollutants; 
 
 
 
 JSC Toxico
-1 Module at
dule at the st
sealed, and th
ples collected
ples were an
nded tables. 
ay Spacecraf
d against 180
e recoveries 
: 13C-acetone
bient facility
he test show 
irs and a rate
y (first interv
units per day
3 d). The slig
t in the chart
 mass of mate
.  
If the time 
 ground to cr
orst-case sce
at the time of
ell below th
rimary contri
yclotrisiloxa
however, the 
 1
 D
 
logy Group a
 Wallops Isla
art of the tes
en taken aga
 at each time
alyzed. The r
Table 1 lists 
t Maximum 
-day SMAC
of surrogate 
, 101%; fluor
 air was extre
excellent agr
 of increase o
al, t = 0 d to 
 (second inte
ht decline in
. The module
rials that wil
from last pur
ew first entry
nario, then th
 first entry is
e threshold th
butors to the 
ne. The crew
usual protect
6 April 2013
ate 
cquired samp
nd, VA.  One
t. Samples of
in in triplicat
, the first ser
esults of 7 
the analytical
Allowable 
s. For purpos
standards pla
obenzene, 98
mely clean (
eement betw
f 0.025 T un
t = 2.73 d) an
rval, t = 2.73
 offgas rate i
 contained 7
l be present a
ge of the mo
 on orbit is 1
e estimated T
 0.00 + [(2.7 
at would imp
T value durin
 can enter the
ions against 
   
les 
 
 the 
e 
ved 
 
es of 
ced 
%; 
0.01 
een 
its 
d 
 d to 
s 
1% 
t 
dule 
9 d 
 
x 
ose 
g 
 
https://ntrs.nasa.gov/search.jsp?R=20130012888 2019-08-31T01:05:32+00:00Z


Whole Module Offgas Test Report: Orbital D-1 Module

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