ML19224B166
| ML19224B166 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/04/1976 |
| From: | Metropolitan Edison Co |
| To: | Mullinix W NRC/IE |
| References | |
| 1775, TM-0143, TM-143, NUDOCS 7906140145 | |
| Download: ML19224B166 (5) | |
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DOCUMENT NO:
7 0F DOCUMENT PROVI.DED BY COPY MADE ON t 'l METROPOLITAN EDISCN COMPANY.
Wilda R. Mullinix, NRC 7 9 0 6 l'4 0 ly.f l89 322
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4,7s THREE MILE ISLAND NUCLE AR STATION 00XTROLLED COPY STATION HEALTH PHYSICS PROCEDURE 1775 BIOLOGICAL AIR SAMPLIflG Table of Effective Pages Pace Date R evision Pace Date Rev;sion Pace Date R evision 1.0 03/04/76 1
26.0 51.0 2.0 03/04/76 1
27.0 52.0 3.0 03/04/76 1
28.0 53.0
'.0 03/04/76 1
29.0 54.0 5.0 30.0 55.0 6.0 31.0 56.0 7.0 32.0 57.0 8.0 33.0 58.0 9.0 34.0 59.0 10.0 35.0 60.0 11.0 36.0 61.0 12.0 37.0 62.0 13.0 38.0 63.0 14.0 39.0 64.0 15.0 40.0 65.0 16.0 41.0 66.0 17.0 42.0 67.0 18.0 43.0 68.0 19.0 44.0 69.0 20.0 45.0 70.0 21.0 46.0 71.0 22.0 47.0 72.0 23.0 48.0 73.0 24.0 49.0 74.0 25.0 50.0 75.0
- Unit 1 Staf f Recommends Approvai Unit 2 Staff Recommends Approval E
Date 22FeBl47G Approva Date 22b8 II[b Approval C h
kognizant Dept. Head Ckgnizant Dept. Head Unit 1 PORC Re ommendl Ap oval Unit 2 PORC R omme s proval
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Chairma: o PORC PORC comment of included PORC commen so P ' included (daf) ate){
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, Date By Date hde Date O ' Y-Approval s
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SHP 1775 Revision 1 03/04/76 THREE MILE ISLAND Nt CLEAR STATION STATION HEALTH PHYS'.CS PROCEDURE 1775 BIOLOGICAL AIR SAMPLING 1.0 PURPOSE The purpose of this precedure is to describe in detail the procedure for sampling of cxygen, combustible gas (hydrogen), carbon monoxide (10) and other toxic contaminants.
2.0 DISCUSSION The biological air survey is an evaluation of levels of oxygen, combustible gas (hydrogen), carbon monoxide and other potential toxic contaminants.
The sampling requirements for toxic contaiminants will be determined by the Supervisor of Radiation Protection and Chemistry.
Periodic surveys will be made in the clean and controlled areas at frequencies dependent on the type of area, its use, its potential hazard, or whenever airborne conditions are uncertain.
3.0 REFERENCES
3.1 MSA Portable Combustible Gas and Oxygen Indicator Model 250 Instruction Manual.
3.2 MSA Universal Tester for Toxic Gases Instruction Manual.
3.3 OSHA, Title 29 CFR 1926.55 3.4 OSHA, Subpart Z - Toxic and Hazardous Substances 4.0 EQUIPMENT 4.1 MSA, Model 250 Combustible Gas and Oxygen Indicator.
4.2 MSA, Universal Tester.
I 4.3 Appropriate glass tubes for Universal Tester pump.
189 324
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SHP 1775 Revision 1 03/04/76 5.0 OPERATING INSTRUCTICNS 5.1 MSA Portable Combustible Gas and Oxygen Indicator Model 250 5.2 Before using the instrument for testing purposes, a zeroing of the instrument is necessary.
NOTE:
The zeroing procedure shoulu be accomplished in a clean air e nvi ronmen t.
5.2.1 Turn the ZERO knob clockwise.
It will " click" ON, and energize both meters.
5.2.2 Press the CHECK button to determine the condition of the battery.
NOTE:
For a charged battery suitable for sampling the needle of the
% LEL meter will register in the Battery Check area.
5.2.3 Adjust the ZERO knob clockwise until the needle of the Combustible Gas Meter (% LEL) reads "0".
5.2.4 Press sample button and readjust ZERO knob as in step 5.2.3.
5.9.5 Allow Oxygen Meter (% 0xygen) to stabilize, it should read 20.8%.
If necessary, adjust the CALIBRATE knob to that point.
5.3 After " zeroing", the instrument is now ready for sampling.
5.4 Press the SAMPLE button for a reading of the atmosphere.
NOTE:
Response time for both meters is almost instantaneous, however, extra time must be alloted for sample line length - approximately one second per each foot of line up to fifty feet.
5.4.1 0xygen levels gre? ~er than 19.5% in areas sampled are acceptable.
5.4.2 Combustible Gas (Hydrogen) levels less than 8.5% in areas sampled are acceptable.
NOTE:
8.5% readings in the instrument ' corresponds to a lower explosive limit (LEL) of 2.a% Hydrogen.
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SHP 1775 Revision 1 03/04/76 5.5 M.S.A. Universal Sampler for Toxic Gases 5.6 Prior to sampling an area for levels of carbon monoxide or any toxic contaminants perform the following steps:
5.6.1 Check the hand pump for leaks.
5.6.2 Turn rotating pump head to the #1 index mark.
5.6.3 Remove one glass detector tube from box and break off both tips using tube breaker hole in face of rotating head.
5.6.4 Insert either end of tube into rubber tube holder.
NOTE:
Usa a gentle up and down pumping motion when inserting glass tube in, insure positive seating.
5.7 Face mounted tube into atmosphere to be tested.
5.8 Align the index marks on handle and back plate of pump.
5.9 Take a 500cc sample (5 pump strokes)
NOTE: Wait a minimum of 70 seconds after each full stroke for the evacuated pump to fill.
5.10 To deter....ne the concentration (ppm) of carbon monoxide or toxic contaminants, use the following steps.
5.10.1 Place zero on scale (see example under step 5.11) in line with beginning of stained chemical in glass detector tube.
5.10.2 Read concentration (ppm) on scale at end of stained portian of chemical.
NOTE:
For i.cceptable levels of carbon monoxide and toxic contaminants, refer to table 1775-1 or OSHA Subpart Z requirements.
5.11 Read the stained portion of chemical by the following example scale.
I use 5 pump strokes li R
2 8
8 8
R 3.0 189 326
Revision 1 1775 03/04/76 NOTE: Atmosphere must meet grade "D" criteria to ce entered without upplied air.
TABLE 1775-t-Til'E 1 Til'E !!
(GASEOLS)
(LIQUID)
Limitin s DES C' II A CharactIristics A
B l C D
E F
G II T-a A
a c?c0:(v/v) a t m.
atm /
aim /
atm/
a r m.
atm/
atm/
atm/
atm/
Balance P.e.
atm.
atm.
p,,.3.n 3 123 233 t 13.n3 P13.n3 r e. 5.u 3 t > 3.n3 tt3.n3 p >.3. 3 3 i t3.u3 dominantIy N:
(Note 1) no:1c Cond-W ater ensed note 2 note 2 note 2 note 2 not t. 2 note 2 1
note 2
/per
- 10.4
- F 3.3.1 )
__Hydrocarbens s
I (condens:d) in l' '{*y\\
Mg/m of gas i
at NTP (Note 3)
_ Carbon 50 23 10 5
5 5
1 5
Monoxide see see see see see see see Oder 3.1.5 5.1.5 5.1.5 5.1.5 5.1.5 5.1.5 5.1.5 Carbon Dioxide 1000 500 5C0 500 500 l.0.5 5
Gaseous 25 15 10 0.5 10 Hydrocarbons i
(as methane)
Nitrogen 2.5 0.5 0.1 0.5 Dioxide Nitrous 0.1 i
Oxide Sulfur 2.5 0.5 0.1 0.5 Dioxide Halogenated 10 1
0.1 1
Solvents 0.05 0.5 Acetylene Permanent
_, 3 3 Partictuates Note 1: The term "at m
(atmospheric), ancies dcwpoint or concentration in ppm (v/v).
the oxygen content normally present in Dewpoint is expressed in temperature 'F atmospheric air; the nmnerical v11ues de-at one atmosphere absolute pressure (760 2
note the oxygen limits for synthesiard air.
mmHg). To convert dewpoint
- F to
- C.
3 Note 2: The water content of compressed sir re-ppm (v/v), or mg/ liter, see 7.1.
J quired for any particular grade raa:. : ;ry Note 3: No limits are given for condersed hydro.
with the intended use from sa>ur strJ to carbons beyond grade E since the gescous very dry. If a speci;ic water limit is re-hydrocarbon limits could not be met if quired, it should be slccified as a.'in.iting conden:rd hydrocarbons were present.
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