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| number = ML19317E479
| number = ML19317E479
| issue date = 10/12/1973
| issue date = 10/12/1973
| title = Rept of Testing of Two Atmosphere Supplying Suits.
| title = Rept of Testing of Two Atmosphere Supplying Suits
| author name = Davis T, Lowry P, Moore T
| author name = Davis T, Lowry P, Moore T
| author affiliation = LOS ALAMOS NATIONAL LABORATORY
| author affiliation = LOS ALAMOS NATIONAL LABORATORY
Line 17: Line 17:


=Text=
=Text=
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W RCPORT CF TESTI:!G OF TiiO ATMCSP!!CRE SUDPLYI!1C SUITS Performed by Thomas O. Davis, Jr.,     P hilic Lo',. r ' , and Tom O.       Moore Respirator Research & Development Section Industrial Hygiene Group Los Alamos Scientific Labcratory University of California
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    .                            Lo s Ala:r.c s , leu Mexico 87544 October 12, 1973 9
W RCPORT CF TESTI:!G OF TiiO ATMCSP!!CRE SUDPLYI!1C SUITS Performed by Thomas O.
: Davis, Jr.,
P hilic Lo',. r ', and Tom O.
Moore Respirator Research & Development Section Industrial Hygiene Group Los Alamos Scientific Labcratory University of California Lo s Ala:r.c s,
leu Mexico 87544 October 12, 1973 9
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              .                      .s I.       Te n t iner Procclure     >
.s I.
All tests were carried out in LASL's respirator fitting chamber.
Te n t iner Procclure All tests were carried out in LASL's respirator fitting chamber.
The challenge aerosol was a polydisperse Dop aerosol, 0.75 pm               '
The challenge aerosol was a polydisperse Dop aerosol, 0.75 pm aerodynamic mass median diameter ( M".MD )..
aerodynamic mass median diameter ( M".MD ). . The cercsol detector *as a LASL forward light scattering photometer.         Penetratica samples were taken from th6 breathing region inside the. hood.
The cercsol detector *as a LASL forward light scattering photometer.
Suit internal pressure uas taken at the upper chest level.             Suit pressure uas indicated by a validyne ultra-lou dif f erential pressure sensor, uith one pressure tap scaled and the other pressure tap con-nected to the suit chest region. The pressure sensor was not calibrated, but was used to indicate relative pressures.
Penetratica samples were taken from th6 breathing region inside the. hood.
Three internal air temperatures were recorded.         The locations were; upper chest region, forearn, and mid-calf.             The leg temperature was taken from the leg being cooled by the leg air tube. The tempera-ture sensors were Yellow Springs Instrument Company's thermistor ther-mometers.         The thermistor probes are designed to measure air tempera-ture only.
Suit internal pressure uas taken at the upper chest level.
The supply air ficwrate was measured by an orifice meter tube with a Magnehelic as the readout. The orifice tube was calibrated by connecting the tube output to one of the suits, placing the suit in a sealed container, and measuring che cucpat fr:m che container. Cali-brations were made for each integer flourate frcm 1 to 10 cfm inclusive.
Suit pressure uas indicated by a validyne ultra-lou dif f erential pressure sensor, uith one pressure tap scaled and the other pressure tap con-nected to the suit chest region.
The calibration for each flourate was made approxi'mately 0. 3 cfm high-er then the integer flourate recordsd in order to compensate for the penetration sampling flowrate. The supply air was 73'? and 5% rela-tive humidicy before entering the suit.
The pressure sensor was not calibrated, but was used to indicate relative pressures.
A series cf exercises was performed by the subject at each tested flowratc.         The exercises were chosen as being basic body movements.
Three internal air temperatures were recorded.
Other movements can be taken as combinations or refinements of these movements.         The exercise series was:
The locations were; upper chest region, forearn, and mid-calf.
: 1. Stand, arms at sides
The leg temperature was taken from the leg being cooled by the leg air tube.
: 2. Bend at unist, touch toes
The tempera-ture sensors were Yellow Springs Instrument Company's thermistor ther-mometers.
: 3. Run in place, lifting knees high (to simulate climbing lad-ders and stairs, and a heavy workload)
The thermistor probes are designed to measure air tempera-ture only.
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The supply air ficwrate was measured by an orifice meter tube with a Magnehelic as the readout.
                                                                              ~
The orifice tube was calibrated by connecting the tube output to one of the suits, placing the suit in a sealed container, and measuring che cucpat fr:m che container.
Ti A W       h              _,
Cali-brations were made for each integer flourate frcm 1 to 10 cfm inclusive.
The calibration for each flourate was made approxi'mately 0. 3 cfm high-er then the integer flourate recordsd in order to compensate for the penetration sampling flowrate.
The supply air was 73'? and 5% rela-tive humidicy before entering the suit.
A series cf exercises was performed by the subject at each tested flowratc.
The exercises were chosen as being basic body movements.
Other movements can be taken as combinations or refinements of these movements.
The exercise series was:
1.
Stand, arms at sides 2.
Bend at unist, touch toes 3.
Run in place, lifting knees high (to simulate climbing lad-ders and stairs, and a heavy workload)
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1GHt a t:as ab.o ve head , low'r atus
1.
                                                                          ~
1GHt a t:as ab.o ve head, low'r atus
: 1.                                              -
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a
a 5.
: 5. Lock-hands .. front of chant, twist tu..so from side to side
Lock-hands.. front of chant, twist tu..so from side to side 6.
: 6. Stand, arms at sides The c::ereisen verc per Cormed in the order l i s t.c d . Each e::ccci se was performed for one minute, or until the leak indication stabili.:ed.
Stand, arms at sides The c::ereisen verc per Cormed in the order l i s t.c d.
If a leak occurred during an exercise, a purge time was allowed before beginning the next exercise. The purge time lasted until the leak in-dication returned to the sedantary leak levels for that flowrate.
Each e::ccci se was performed for one minute, or until the leak indication stabili.:ed.
II. Aerocol Penetration Test Results           .
If a leak occurred during an exercise, a purge time was allowed before beginning the next exercise.
Table I gi9es the percent penetratEons for the tests on the Sny-der suit. A "T"   in a box indicates general penetration levels were so high that the test was terminated to reduce the subject's exposure.
The purge time lasted until the leak in-dication returned to the sedantary leak levels for that flowrate.
II.
Aerocol Penetration Test Results Table I gi9es the percent penetratEons for the tests on the Sny-der suit.
A "T"
in a box indicates general penetration levels were so high that the test was terminated to reduce the subject's exposure.
Table II gives the percent penetrations for the testr en the Mound bubble suit, without pants' suspenders.
Table II gives the percent penetrations for the testr en the Mound bubble suit, without pants' suspenders.
Table III gives the percent penetrations for the tests on the Mound bubble suit, uith pants' suspendars.
Table III gives the percent penetrations for the tests on the Mound bubble suit, uith pants' suspendars.
The testing shown in Table III was performed because the opera-tor observed that as the pants of the Mound suit rode lower as ex-ercises continued, th"e penetrations increased.         Cord suspenders were     e made which held the. waistband of the pants as high as possible.
The testing shown in Table III was performed because the opera-tor observed that as the pants of the Mound suit rode lower as ex-ercises continued, th"e penetrations increased.
Tests uhile using suspenders were made, as shown in Table III. Table III does show louer, and less erratic, penetrations.
Cord suspenders were e
made which held the. waistband of the pants as high as possible.
Tests uhile using suspenders were made, as shown in Table III.
Table III does show louer, and less erratic, penetrations.
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.            . A. . Snydce Suit ,                          ,
A.
                                      \
. Snydce Suit,
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The suit unusd not hold any pressure.
The suit unusd not hold any pressure.
While the subject was standing still, the pressure sensor uns zerocd at each flowrate.
While the subject was standing still, the pressure sensor uns zerocd at each flowrate.
The bending exercises showed sudden pulses from nero to ~ 3 " o f !! 0             h 2
h The bending exercises showed sudden pulses from nero to ~ 3 " o f !! 0 2
pressure.       This may have been kinking of the probe line. But, bend-ing always showed hfjh penetrations, so rapid pressure pulse may have been aiding acrosol dispersion.
pressure.
B.                                                          .
This may have been kinking of the probe line.
Mound Suit- li.e3 2 6e l The pressure inside the suit at chest level never vent nega-
But, bend-ing always showed hfjh penetrations, so rapid pressure pulse may have been aiding acrosol dispersion.
.      tive.       The amcunt of positive pressure depended on the flowrate. The amount of positive ' pressure at a flowrate could be reasurably les-sened by the subject's normal inhalation even at supply flourates as             ~
B.
Mound Suit-li.e3 2 6e l The pressure inside the suit at chest level never vent nega-tive.
The amcunt of positive pressure depended on the flowrate.
The amount of positive ' pressure at a flowrate could be reasurably les-sened by the subject's normal inhalation even at supply flourates as
~
high as 8 cfm.
high as 8 cfm.
IV.
IV.
Internal Suit _Temoeratures Table IV gives the temperature results for the Snyder suit tests..
Internal Suit _Temoeratures Table IV gives the temperature results for the Snyder suit tests..
Table V gives the temperature results for the Mound suit tests.
Table V gives the temperature results for the Mound suit tests.
V.       Subject's Cor.ments i
V.
A. Snyder Suit
Subject's Cor.ments i
: 1. Pants suspenders, good.
A.
: 2. Shirt tie-downs, good.
Snyder Suit 1.
: 3. Draustrings at pants and shirt waistbands, not good; would not draw tight enough.
Pants suspenders, good.
: 1. Air delivery system very annoying, air. j et directed at right eye, causes severe headache after one hour.
2.
: 5. Arms and legs receive virtually no cooling.
Shirt tie-downs, good.
3.
Draustrings at pants and shirt waistbands, not good; would not draw tight enough.
1.
Air delivery system very annoying, air. j et directed at right eye, causes severe headache after one hour.
5.
Arms and legs receive virtually no cooling.
Inside of suit, arms and legs covered with condensed sweat after one hour of testing.
Inside of suit, arms and legs covered with condensed sweat after one hour of testing.
B. Mound Suit     E us . i fe : >                                         ,
B.
                  . 1. Pants and shirt clastic unistbands, gccd.                  .
Mound Suit E us. i fe : >
: 2. . Shirt needs' tie-downs.
1.
: 3. Suit uncomfortably inflated even at low flowrates.
Pants and shirt clastic unistbands, gccd.
: 4. Air delivery system irritates cyes and ears. Suggest scme kind of baffle to keep air jets cut of eyes.
: 2.. Shirt needs' tie-downs.
: 5. Arms and legs receive virtually no coolit.g.
3.
Inside of suit, arms and legs covered with condensed sweat at the end of one                   ;
Suit uncomfortably inflated even at low flowrates.
hour of testing.                                    .
4.
Air delivery system irritates cyes and ears.
Suggest
' scme kind of baffle to keep air jets cut of eyes.
5.
Arms and legs receive virtually no coolit.g.
Inside of suit, arms and legs covered with condensed sweat at the end of one hour of testing.
3
3
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V P.,     Mult Comoarison       .                        ~
V P.,
3   .
Mult Comoarison
A. Aerosol Peneeration                     ,
~
The Mound bubble suit, with pants suspenders, has lower an'd Icss crratic penetrations than the Snyder suit or the Mound bubbic suit without pants suspenders.
3 A.
                      'B.     Internal Pressuro
Aerosol Peneeration The Mound bubble suit, with pants suspenders, has lower an'd Icss crratic penetrations than the Snyder suit or the Mound bubbic suit without pants suspenders.
                  -            The Mound bubble suit always maintained'a positive internal pressure. The Snyder suit never shoued a measurable' positive internal pressure.                   '
'B.
C. Internal Temperature           ,,,,
Internal Pressuro The Mound bubble suit always maintained'a positive internal The Snyder suit never shoued a measurable' positive internal pressure.
s Both suits maintained a fairly constant chest region tempera -
pressure.
l              ture.          Neither suit provided effective cooling for the extremities.
C.
Internal Temperature Both suits maintained a fairly constant chest region tempera -
s Neither suit provided effective cooling for the extremities.
l ture.
VII. Reccmmendations The Mound bubble suit with pants suspendars provides the better l
VII. Reccmmendations The Mound bubble suit with pants suspendars provides the better l
l protection of the two suits tested. The Mound bubble suit had the i
l protection of the two suits tested.
better wearer response of the two suits tested. Internal temperature of the suits was comparable. Therefore, we recommend the u'se of the l
The Mound bubble suit had the better wearer response of the two suits tested.
Mound bubble suit with suspenders to hold the pants waistband as high
Internal temperature i
:              as possible.
l of the suits was comparable.
Y                                                                         #
Therefore, we recommend the u'se of the Mound bubble suit with suspenders to hold the pants waistband as high as possible.
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Table I                                   .
Table I PERCENT PEIETRATIO:1 vs E:CRCISE AT VARIOUS FLC'.1 RATES : St!YDER SUIT Flow Ratcc (cfm)
PERCENT PEIETRATIO:1 vs E:CRCISE AT VARIOUS FLC'.1 RATES : St!YDER SUIT Flow Ratcc (cfm)
Exercise 1
Exercise     1 2       3       4       5       6       7     8     9       10 Standing         T 0.01     0.003 0.001   0.02     0.01   0.001 0.001   0.001 0.00 Bending           2.0     1.5   3.5     1.0     1.1     0.23 0.50   1.0   1.3 Running         T T       1.5   1.6     4.8     1.0     1.5   0.2     0.55 0.02 Lifting arms T     T       1.0   1.2     0.9     2.4     0.45 0.4     1.3   0.32 Twisting         T T       0.5   6.0     0.22     1.9     0.12 0.3     0.17 0.02 Standing         T T       0.005 0.001   0.02   0.013   0.001 0.002   0.001 0.0(
2 3
4 5
6 7
8 9
10 Standing T
0.01 0.003 0.001 0.02 0.01 0.001 0.001 0.001 0.00 Bending 2.0 1.5 3.5 1.0 1.1 0.23 0.50 1.0 1.3 Running T
T 1.5 1.6 4.8 1.0 1.5 0.2 0.55 0.02 Lifting arms T T
1.0 1.2 0.9 2.4 0.45 0.4 1.3 0.32 Twisting T
T 0.5 6.0 0.22 1.9 0.12 0.3 0.17 0.02 Standing T
T 0.005 0.001 0.02 0.013 0.001 0.002 0.001 0.0(
Purge time from maximum leakage
Purge time from maximum leakage
(?Iin)         T >2       1.5     1.5     1.0     1.0     1.0   1.5   1.C   0.5 0
(?Iin)
wes +       R A     =
T
>2 1.5 1.5 1.0 1.0 1.0 1.5 1.C 0.5 wes
+
R A 0 *
=
1 I.
1 I.
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                                                            .                              ' TABLE III t_.r4 5 - I T h e>
' TABLE III t_.r4 5 - I T h e>
PERCENT pet 3ETPATION vs' EXERCISE AT VARIOUS FLOM RATES: MOUND SUIT - WITH SUSPENDERS Flow Rates (cfm)
PERCENT pet 3ETPATION vs' EXERCISE AT VARIOUS FLOM RATES: MOUND SUIT - WITH SUSPENDERS Flow Rates (cfm)
                                      ~ Exercisc         1-       2             3             4               5       6         7     8         9     10 w
~ Exercisc 1-2 3
4 5
6 7
8 9
10 w
t' }
t' }
Standing                   T       0.002 <0.001               0.001           0.002   0.002     0.001 0.001     0.002 <0.001 Dending'                   T       0.004       0.19           0.003           0.032   0.004     0.002 0.011     0.003 <0.001
Standing T
,i Running                 .T       0.2G       0.16           0.015           0.013(.0.006 I     0.003 0.002     0.002 <0.001 Lifting arms.                                               0.005           0.004   0.004 Twisting                                                     0.005           0.004   0.003
0.002 <0.001 0.001 0.002 0.002 0.001 0.001 0.002 <0.001 Dending' T
                            ' Standing                                                       0.002           0.002   0.003 9
0.004 0.19 0.003 0.032 0.004 0.002 0.011 0.003 <0.001
;                                                                                                                                        't
,i Running
;
.T 0.2G 0.16 0.015 0.013(.0.006 I 0.003 0.002 0.002 <0.001 Lifting arms.
Purge time from-ih-max leakage (Min)                                                     1               1       0.5 1
0.005 0.004 0.004 Twisting 0.005 0.004 0.003
0 i                                                                                                                               .            .
' Standing 0.002 0.002 0.003 9
't Purge time from-ih-max leakage (Min) 1 1
0.5 1
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  .                                                                                                    TABLE IV                                   '
TABLE IV
  %j~     ':                                                                                                                                          .
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  +p 1[y                                                                          AVERAGE TEMPERATURES ('F) DURING EXERCISES AT VARIOUS FLOW RATES: SNYLER SUIT
+p AVERAGE TEMPERATURES ('F) DURING EXERCISES 1[y AT VARIOUS FLOW RATES: SNYLER SUIT
  'i'.
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Q*                                   .                                                      . Flow Ra tes (cfm) si Exercise                       2                         3 4                   5                   6
. Flow Ra tes (cfm) si Exercise 2
  ...                                                            Arm Leg Chest         Arm Ley Chest           Arm Leg Chest Arm Leg Chest Standing                 86   81     81       82     78                                                   Arm Leo _C h 80       82   82   77   84     75 Bending                                                                                                79       80' 75 88   82     82       82     78     81     82   80     80   85     77   79 Running                                                                                                        80     77-83     79     82     78   75     80   85     76   80     80     76 Lifting arms                                     82     80     82     79   76     79   84     75   79     80     74 Twisting                                         85     78     81     80   76     79   85     75   78     SO   '75 Standing                                         85     78     81     79   76   78   84     75   79     80     75 Flow Rates (cfm)                       't Exercise                     7                       !!                  9                 10 y                                               Arm. Leg Chest         Arm Lcq Chest
3 4
            '                                                                                                  Ann Leg Chest     Arm Leg Chest Standing                   80   74     77     ,82       74     78     88   78     80   87     76   80 Bending                   82   77     79       82       76     78     87   78   80   87     78   80 Runnir3g                   83   74     79       81     76     78     90   79   80   88     79   80 Lifting arms               82   74     78       80     75     78     88   80   80   89     77   80
5 6
                                      . Twisting                 81   74     78       82     76     78     85   77   80   89     78   80 Standing                   82   74     76       82     77     79     85   77   80   80     77-   79 k:
Arm Leg Chest Arm Ley Chest Arm Leg Chest Arm Leg Chest Arm Leo _C h Standing 86 81 81 82 78 80 82 82 77 84 75 79 80' 75 Bending 88 82 82 82 78 81 82 80 80 85 77 79 80 77-Running 83 79 82 78 75 80 85 76 80 80 76 Lifting arms 82 80 82 79 76 79 84 75 79 80 74 Twisting 85 78 81 80 76 79 85 75 78 SO
'75 Standing 85 78 81 79 76 78 84 75 79 80 75 Flow Rates (cfm)
't Exercise 7
9 10 y
Arm. Leg Chest Arm Lcq Chest Ann Leg Chest Arm Leg Chest Standing 80 74 77
,82 74 78 88 78 80 87 76 80 Bending 82 77 79 82 76 78 87 78 80 87 78 80 Runnir3g 83 74 79 81 76 78 90 79 80 88 79 80 Lifting arms 82 74 78 80 75 78 88 80 80 89 77 80
. Twisting 81 74 78 82 76 78 85 77 80 89 78 80 Standing 82 74 76 82 77 79 85 77 80 80 77-79 k:
F
F
, , _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _          - - l *' 'I '-
- - l *' 'I


r l
r l
l
TABLE V l
                                -                            TABLE V (ens - t T6 ol AVERAGE TEMPERATURES (8F) DURING EXERCISES
(ens - t T6 ol AVERAGE TEMPERATURES (8F) DURING EXERCISES
{
{
i                                            AT VARIOUS PLON RATES: MOUND SUIT Flow Rates (cfm) 3                   4             5             6 Exercise              2 Arm Leq Chest       Arm Leg Chest Arm Leg __ Chest Arm Leg Ches Arm Leg Chest 82       83   86   80 78   80   78   83 84     80 Standing        88    83     82      89   86 83       83   84   80 79   81   79   83 84     81 Ben < ling      87   83    83        89  86 84       83   82   82 80   80   80   83 83     82 Running        87    82    84       90  85 87     83       82   84   Bl 80   82   80   82 84     81 Lifting arms    86    84    83       89 90 85     83       82   84   81 82   81   79   82 83   '81 T.iisting      87    83    83 83       83   84   81 81   81   79   83 34     30 Standing        88    85    83        90  86 i
AT VARIOUS PLON RATES: MOUND SUIT i
Flow Rates (cfm) 7                   8                   9           10 fT      Exercise Arm Lcq Chest       Ann Leq Chest Arm Leu Chest _
Flow Rates (cfm)
Arm Leg Chest                                                                    ,
Exercise 2
82       8'4 84     80       88   83   80   82   80   78 Standing      88     83 82       83   83     80       88   83   8l   84   81   79         -
3 4
Bending      88     83 84   82     81       88   83   82   85   80   80 Running      88    84     83 03   84     81       88   84   81   86   84   79 Lifting arms
5 6
                          "~
Arm Leg Chest Arm Leq Chest Arm Leg Chest Arm Leg __ Chest Arm Leg Ches Standing 88 83 82 89 86 82 83 86 80 78 80 78 83 84 80 Ben < ling 87 83 83 89 86 83 83 84 80 79 81 79 83 84 81 Running 87 82 84 90 85 84 83 82 82 80 80 80 83 83 82 Lifting arms 86 84 83 89 87 83 82 84 Bl 80 82 80 82 84 81 T.iisting 87 83 83 90 85 83 82 84 81 82 81 79 82 83
84    82 82       82   84     81       90   83   81   86   82   79
'81 Standing 88 85 83 90 86 83 83 84 81 81 81 79 83 34 30 i
,            Tuisting      89     83 81       84   82     81       90   83   80   86   81   79 Standing      89    86 9}}
Flow Rates (cfm) fT Exercise 7
8 9
10 Arm Leg Chest Arm Lcq Chest Ann Leq Chest Arm Leu Chest _
Standing 88 83 82 8'4 84 80 88 83 80 82 80 78 Bending 88 83 82 83 83 80 88 83 8l 84 81 79 Running 88 84 83 84 82 81 88 83 82 85 80 80 Lifting arms 84 82 03 84 81 88 84 81 86 84 79
"~
Tuisting 89 83 82 82 84 81 90 83 81 86 82 79 Standing 89 86 81 84 82 81 90 83 80 86 81 79 9}}

Latest revision as of 21:56, 1 January 2025

Rept of Testing of Two Atmosphere Supplying Suits
ML19317E479
Person / Time
Site: Oconee  Duke Energy icon.png
Issue date: 10/12/1973
From: Davis T, Lowry P, Moore T
LOS ALAMOS NATIONAL LABORATORY
To:
Shared Package
ML19317E464 List:
References
NUDOCS 7912180725
Download: ML19317E479 (10)


Text

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W RCPORT CF TESTI:!G OF TiiO ATMCSP!!CRE SUDPLYI!1C SUITS Performed by Thomas O.

Davis, Jr.,

P hilic Lo',. r ', and Tom O.

Moore Respirator Research & Development Section Industrial Hygiene Group Los Alamos Scientific Labcratory University of California Lo s Ala:r.c s,

leu Mexico 87544 October 12, 1973 9

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Te n t iner Procclure All tests were carried out in LASL's respirator fitting chamber.

The challenge aerosol was a polydisperse Dop aerosol, 0.75 pm aerodynamic mass median diameter ( M".MD )..

The cercsol detector *as a LASL forward light scattering photometer.

Penetratica samples were taken from th6 breathing region inside the. hood.

Suit internal pressure uas taken at the upper chest level.

Suit pressure uas indicated by a validyne ultra-lou dif f erential pressure sensor, uith one pressure tap scaled and the other pressure tap con-nected to the suit chest region.

The pressure sensor was not calibrated, but was used to indicate relative pressures.

Three internal air temperatures were recorded.

The locations were; upper chest region, forearn, and mid-calf.

The leg temperature was taken from the leg being cooled by the leg air tube.

The tempera-ture sensors were Yellow Springs Instrument Company's thermistor ther-mometers.

The thermistor probes are designed to measure air tempera-ture only.

The supply air ficwrate was measured by an orifice meter tube with a Magnehelic as the readout.

The orifice tube was calibrated by connecting the tube output to one of the suits, placing the suit in a sealed container, and measuring che cucpat fr:m che container.

Cali-brations were made for each integer flourate frcm 1 to 10 cfm inclusive.

The calibration for each flourate was made approxi'mately 0. 3 cfm high-er then the integer flourate recordsd in order to compensate for the penetration sampling flowrate.

The supply air was 73'? and 5% rela-tive humidicy before entering the suit.

A series cf exercises was performed by the subject at each tested flowratc.

The exercises were chosen as being basic body movements.

Other movements can be taken as combinations or refinements of these movements.

The exercise series was:

1.

Stand, arms at sides 2.

Bend at unist, touch toes 3.

Run in place, lifting knees high (to simulate climbing lad-ders and stairs, and a heavy workload)

D" i'D f

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h b @bj W

N

1.

1GHt a t:as ab.o ve head, low'r atus

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a 5.

Lock-hands.. front of chant, twist tu..so from side to side 6.

Stand, arms at sides The c::ereisen verc per Cormed in the order l i s t.c d.

Each e::ccci se was performed for one minute, or until the leak indication stabili.:ed.

If a leak occurred during an exercise, a purge time was allowed before beginning the next exercise.

The purge time lasted until the leak in-dication returned to the sedantary leak levels for that flowrate.

II.

Aerocol Penetration Test Results Table I gi9es the percent penetratEons for the tests on the Sny-der suit.

A "T"

in a box indicates general penetration levels were so high that the test was terminated to reduce the subject's exposure.

Table II gives the percent penetrations for the testr en the Mound bubble suit, without pants' suspenders.

Table III gives the percent penetrations for the tests on the Mound bubble suit, uith pants' suspendars.

The testing shown in Table III was performed because the opera-tor observed that as the pants of the Mound suit rode lower as ex-ercises continued, th"e penetrations increased.

Cord suspenders were e

made which held the. waistband of the pants as high as possible.

Tests uhile using suspenders were made, as shown in Table III.

Table III does show louer, and less erratic, penetrations.

ras saan l

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9 2

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A.

. Snydce Suit,

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The suit unusd not hold any pressure.

While the subject was standing still, the pressure sensor uns zerocd at each flowrate.

h The bending exercises showed sudden pulses from nero to ~ 3 " o f !! 0 2

pressure.

This may have been kinking of the probe line.

But, bend-ing always showed hfjh penetrations, so rapid pressure pulse may have been aiding acrosol dispersion.

B.

Mound Suit-li.e3 2 6e l The pressure inside the suit at chest level never vent nega-tive.

The amcunt of positive pressure depended on the flowrate.

The amount of positive ' pressure at a flowrate could be reasurably les-sened by the subject's normal inhalation even at supply flourates as

~

high as 8 cfm.

IV.

Internal Suit _Temoeratures Table IV gives the temperature results for the Snyder suit tests..

Table V gives the temperature results for the Mound suit tests.

V.

Subject's Cor.ments i

A.

Snyder Suit 1.

Pants suspenders, good.

2.

Shirt tie-downs, good.

3.

Draustrings at pants and shirt waistbands, not good; would not draw tight enough.

1.

Air delivery system very annoying, air. j et directed at right eye, causes severe headache after one hour.

5.

Arms and legs receive virtually no cooling.

Inside of suit, arms and legs covered with condensed sweat after one hour of testing.

B.

Mound Suit E us. i fe : >

1.

Pants and shirt clastic unistbands, gccd.

2.. Shirt needs' tie-downs.

3.

Suit uncomfortably inflated even at low flowrates.

4.

Air delivery system irritates cyes and ears.

Suggest

' scme kind of baffle to keep air jets cut of eyes.

5.

Arms and legs receive virtually no coolit.g.

Inside of suit, arms and legs covered with condensed sweat at the end of one hour of testing.

3

___J

V P.,

Mult Comoarison

~

3 A.

Aerosol Peneeration The Mound bubble suit, with pants suspenders, has lower an'd Icss crratic penetrations than the Snyder suit or the Mound bubbic suit without pants suspenders.

'B.

Internal Pressuro The Mound bubble suit always maintained'a positive internal The Snyder suit never shoued a measurable' positive internal pressure.

pressure.

C.

Internal Temperature Both suits maintained a fairly constant chest region tempera -

s Neither suit provided effective cooling for the extremities.

l ture.

VII. Reccmmendations The Mound bubble suit with pants suspendars provides the better l

l protection of the two suits tested.

The Mound bubble suit had the better wearer response of the two suits tested.

Internal temperature i

l of the suits was comparable.

Therefore, we recommend the u'se of the Mound bubble suit with suspenders to hold the pants waistband as high as possible.

Y 9

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6 e

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d 6

i 9

i 1

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4 A

Table I PERCENT PEIETRATIO:1 vs E:CRCISE AT VARIOUS FLC'.1 RATES : St!YDER SUIT Flow Ratcc (cfm)

Exercise 1

2 3

4 5

6 7

8 9

10 Standing T

0.01 0.003 0.001 0.02 0.01 0.001 0.001 0.001 0.00 Bending 2.0 1.5 3.5 1.0 1.1 0.23 0.50 1.0 1.3 Running T

T 1.5 1.6 4.8 1.0 1.5 0.2 0.55 0.02 Lifting arms T T

1.0 1.2 0.9 2.4 0.45 0.4 1.3 0.32 Twisting T

T 0.5 6.0 0.22 1.9 0.12 0.3 0.17 0.02 Standing T

T 0.005 0.001 0.02 0.013 0.001 0.002 0.001 0.0(

Purge time from maximum leakage

(?Iin)

T

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' TABLE III t_.r4 5 - I T h e>

PERCENT pet 3ETPATION vs' EXERCISE AT VARIOUS FLOM RATES: MOUND SUIT - WITH SUSPENDERS Flow Rates (cfm)

~ Exercisc 1-2 3

4 5

6 7

8 9

10 w

t' }

Standing T

0.002 <0.001 0.001 0.002 0.002 0.001 0.001 0.002 <0.001 Dending' T

0.004 0.19 0.003 0.032 0.004 0.002 0.011 0.003 <0.001

,i Running

.T 0.2G 0.16 0.015 0.013(.0.006 I 0.003 0.002 0.002 <0.001 Lifting arms.

0.005 0.004 0.004 Twisting 0.005 0.004 0.003

' Standing 0.002 0.002 0.003 9

't Purge time from-ih-max leakage (Min) 1 1

0.5 1

0 i

i 3

e 1

1-a i

t

~

y7, i'

$![

e.

~ ':

TABLE IV

%j~

+p AVERAGE TEMPERATURES ('F) DURING EXERCISES 1[y AT VARIOUS FLOW RATES: SNYLER SUIT

'i Q*

. Flow Ra tes (cfm) si Exercise 2

3 4

5 6

Arm Leg Chest Arm Ley Chest Arm Leg Chest Arm Leg Chest Arm Leo _C h Standing 86 81 81 82 78 80 82 82 77 84 75 79 80' 75 Bending 88 82 82 82 78 81 82 80 80 85 77 79 80 77-Running 83 79 82 78 75 80 85 76 80 80 76 Lifting arms 82 80 82 79 76 79 84 75 79 80 74 Twisting 85 78 81 80 76 79 85 75 78 SO

'75 Standing 85 78 81 79 76 78 84 75 79 80 75 Flow Rates (cfm)

't Exercise 7

9 10 y

Arm. Leg Chest Arm Lcq Chest Ann Leg Chest Arm Leg Chest Standing 80 74 77

,82 74 78 88 78 80 87 76 80 Bending 82 77 79 82 76 78 87 78 80 87 78 80 Runnir3g 83 74 79 81 76 78 90 79 80 88 79 80 Lifting arms 82 74 78 80 75 78 88 80 80 89 77 80

. Twisting 81 74 78 82 76 78 85 77 80 89 78 80 Standing 82 74 76 82 77 79 85 77 80 80 77-79 k:

F

- - l *' 'I

r l

TABLE V l

(ens - t T6 ol AVERAGE TEMPERATURES (8F) DURING EXERCISES

{

AT VARIOUS PLON RATES: MOUND SUIT i

Flow Rates (cfm)

Exercise 2

3 4

5 6

Arm Leg Chest Arm Leq Chest Arm Leg Chest Arm Leg __ Chest Arm Leg Ches Standing 88 83 82 89 86 82 83 86 80 78 80 78 83 84 80 Ben < ling 87 83 83 89 86 83 83 84 80 79 81 79 83 84 81 Running 87 82 84 90 85 84 83 82 82 80 80 80 83 83 82 Lifting arms 86 84 83 89 87 83 82 84 Bl 80 82 80 82 84 81 T.iisting 87 83 83 90 85 83 82 84 81 82 81 79 82 83

'81 Standing 88 85 83 90 86 83 83 84 81 81 81 79 83 34 30 i

Flow Rates (cfm) fT Exercise 7

8 9

10 Arm Leg Chest Arm Lcq Chest Ann Leq Chest Arm Leu Chest _

Standing 88 83 82 8'4 84 80 88 83 80 82 80 78 Bending 88 83 82 83 83 80 88 83 8l 84 81 79 Running 88 84 83 84 82 81 88 83 82 85 80 80 Lifting arms 84 82 03 84 81 88 84 81 86 84 79

"~

Tuisting 89 83 82 82 84 81 90 83 81 86 82 79 Standing 89 86 81 84 82 81 90 83 80 86 81 79 9