Text

Requests Exemption from App a to 10CFR20 to Allow Credit for Use of Radioiodine Protection Factor for GMR-I Filter Canisters.Exemption Would Reduce Physical Work Effort,Stress & Personnel Radiation Exposure
	ML20133N670
Person / Time
Site:	Callaway
Issue date:	10/22/1985
From:	Schnell D; UNION ELECTRIC CO.
To:	Harold Denton; Office of Nuclear Reactor Regulation
References
	ULNRC-1193, NUDOCS 8510300001
	Download: ML20133N670 (24)
	v • d • e

_

88 UNION ELECTRIC COMPANY 1901 Grotiot Street St Louis Donok1 F. Schnell Vice President October 22, 1985 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555 ULNRC-1193

Dear Mr. Denton:

DOCKET NUMBER 50-483 CALLAWAY PLANT, UNIT 1 REQUEST FOR EXEMPTION FROM APPENDIX A TO 10 CFR 20 TO ALLOW CREDIT FOR USE OF A RADIOIODINE PROTECTION FACTOR FOR GMR-I FILTER CANISTERS Appendix A to 10 CFR 20 establishes protection factors for air-purifying respirators for particulates only, and footnote d-2 (c) states that "no allowance is to be made for the use of sorbents against radioactive gases or vapors."

However, 10 CFR 20.103(e) allows an exemption to be authorized by the Commission in lieu of a NIOSH/MSHA certification schedule based on adequate testing, material and performance characteristics.

The manufac-turers of the GMR-I canister, Mine Safety Appliances Company (MSA), has performed testing on the basis of the recommended certification process of NUREG/CR-3403, " Criteria and Test Methods for Certifying Air-Purifying Respirator Cartridges and Canisters Against Radiciodine," and obtained reliable test information (summary attached) that the material and performance characteristics of the equipment are capable of providing the proposed degree of protection under specified conditions of use.

Therefore, pursuant to 10 CFR 20.103(e) and 10 CFR 20.501, Union Electric hereby applies for an exemption to 10 CFR 20, Appen-dix A, footnote d-2(c) to allow credit for a radiciodine protection factor in employing the MSA GMR-I canister (No. 466220) for respiratory protection based on the conditions of use specified below.

Based on the test information provided by MSA for the GMR-I canister (No. 466220), Union Electric requests credit for a protection factor of 50 against radioiodine, contingent on the following conditions of use:

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I 8510300001 851022 i

0 PDR ADOCK 05000483 3i P

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Moiting Address: RO Box 149. St Louis, MO 63166

'Mr. ' Harold R. Denton Page 2 October 22, 1985 1)

A maximum continuous use period of eight hours will be established, after which the used canisters will be discarded to prevent reuse.

The use period will begin when the canister is unsealed and will include periods of nonexposure.

2)

Canisters will not be exposed to or used in environments containing organic vapors and chemicals which could cause aging, poisoning or desorption of the absorbed radiciodines.

3)

Canisters will be stored in sealed, humidity barrier packaging in a cool, dry environment.

4)

Canisters will only be used with full facepiece masks capable of providing protection factors greater than 100.

5)

Canister use will be limited to a total challenge concentration of organic iodines and other hologenated (including nonradioactive) compounds of one (1) ppm.

6)

Canisters will not be used in environments where temperatures exceed 110*F.

Temperatures in the work area will be measured each shift and/or coincidentally with operations which heat the work area to assure temperatures do not exceed 110*F during GMR-I use.

The above restrictions and limitations will be incorporated into specific plant procedures and training will be provided to workers and health physics technicians prior to use of the GMR-I canisters.

The existing respiratory protection program require-ments and restrictions will also apply to the GMR-I canisters.

This exemption is desirable in reducing physical work effort / stress, as well as personnel radiation exposure, and is consistent with the ALARA concept.

The utilization of air-purifying respirators in lieu of air-supplied or self-contained apparatuses will not only reduce the physical work effort and stress on the worker but can result in a 25 percent to 50 percent reduction in personnel exposure.

The use of air-purifying respirators provides significantly greater comfort and mobility versus self-contained apparatuses and results in increased worker efficiency with a corresponding decrease in exposure time on the job.

Pursuant to 10 CFR 20.103(g), this letter also represents notification of an intent to use the MSA GMR-I canister (No. 466220) under the conditions and limitations described above thirty (30) days from this date, pending NRC approval of this exemption request.

Mr. ' Harold R. Denton Page 3 October 22, 1985 Any questions concerning this request should be directed to Mr. Mike Williams of my staff.

Very truly yours,

}t' Donald F.

Schnell MCW/lkr Attachment

'Mr. ' Harold R. Denton Page 4 October 22, 1985 cc:

Gerald Charnoff, Esq.

Shaw, Pittman, Potts & Trowbridge 1800 M Street, NW Washington, DC 20036 Nicholas A.

Petrick Executive Director SNUPPS 5 Choke Cherry Road Rockville, MD 20850 G. C. Wright Division of Projects and Resident Programs, Chief, Section lA l

U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 Bruce Little Callaway Resident Office U.S. Nuclear Regulatory Commission RR #1 Steedman, MO 65077 Tom Alexion Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop P-316 7920 Norfolk Avenue Bethesda, MD 20014

STATE OF MISSOURI )

)

SS CITY OF ST. LOUIS )

Donald F.

Schnell, of lawful age, being first dul sworn upon oath says that he is Vice President-Nuclear and an officer of Union Electric Company; that he has read the foregoing document and knows the content thereof; that he has executed the same for and on behalf of said company with full power and authority to do so; and that the facts therein stated are true and correct to the best of his knowledge, information and belief.

By Donald F.

Schnell Vice President Nuclear SUBSCRIBED and sworn to before me this d day of d_$/ad, 198g

',- AAh/AA..

AlY

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6/% h (/ 0 BARBARA J. PTNF NOTARY PUBtlC, STATE OF Mf5SCURt MY COMMIS5t0N EXfiFES APR:L 22,13?3 ST. LOUIS COUNTY

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wne Safety Acehances Company 600 Penn Center Boulevard Pittsburgh, Pennsylvania 15235 u2/2 m ccc April 13,1984 412-273-5140 Mr. Wayne Carr Health Physics Alabama Power Company 600 North 18th St.

P. O. Box 2641 Birmingham, AL 35291

Dear Mr. Carr:

In accordance with our agreement, the following report is submitted for your approval.

~

1.

General It was agreed with Alabama Power Company on March 8,1984, that MSA

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would test GMR-I cans to complegion in order to be able to statistic-ally project performance at 110 F and 100% RH.

In' addition, other tests had been run prior to the March 8th agreement and the data are shown in Table I.

The tests were conducted under the following con-ditions :

Challenge Conc.: 5 - 10 ppm CH I Humidity:

60 + 3% and 90 + 3% 3(minimum of six cans at eac5hgmidity)-

Temperature:

110 F Cyclic Flow:

192 LPM for 0.82 sec. ; 0 LPM for 1.64 sec.,

repeating this cycle throughout the test.

This gives a minute volume of 64 L.

Breakthrough Conc.: 1% of the challenge concentration 2.

Test Results During this program, 48 GMR-I cans have been tested (47 valid tests).

These cans came from six production lots made over the period Aaril 14, 1983, to February 2,1984. Sixteen cans were tested from lot April 14, 1983, 10 at 90% RH and 6 at 50% RH.

Only eight results at 90% RH were used in the statistical analysis given below, as one test was invalid (No. 47) and anc*.her was stopped before completion.

Only a few cans were available from the other lots, so they could not be statistically analyzed; however, all cans run to completion had a service time of G

Mr. ' Wayne Carr Page Two i

April 13,1984 20 hours2.314815e-4 days 0.00556 hours 3.306878e-5 weeks 7.61e-6 months or greater. The results are shown in Table 1.

The original 14 cans not run to completion had service times well in excess of 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months - much in excess of the eight hours desired.

3.

Statistical Analysis of Lot 4/14/83. Table 2 shows the data used and the statistical analysis to give the 99% prediction interval for individual values of Log Y (log service time), when X (relative humidity) is 100%. The lower limit of this interval is calculated to be 15.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months . This predicts that over 99% of the individual GMR-I. can service times would be greater than 15.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months at 100". RH and the other test parameters used in this program. This gives a considerable safety margin over the eight hours desired.

One other interesting point to note from the data in Table 2, as well as all of the test data on the GMR-I cans, is that humidity has little_ or no effect: on the service time over the humidity range studied, 60~to 90%. This would indicate that results at 100% RH would be very close to those at 90% on a. log service time--log RH plot, unless the sTope were extremely steep--which is not the case.

4.

Proposed Acceptance Plan. The extremely long service times experienced in this program for the GMR-I cans run to completion, an average of

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over 29 hours3.356481e-4 days 0.00806 hours 4.794974e-5 weeks 1.10345e-5 months , makes testing to completion for routine lot acceotance impractical; therefore, the following plan is proposed.

4.1 Interim Plan. On an interim basis, until more data can be gathered as explained in section 4.2, tna proposed lot acceotance

.would be as follows:

4.1.1 MIL-STD 414, Level II, AQL 1% would be used to (1) select the proper number of cans to test, depending on lot size, and (2) to interpret the results regarding lot acceptance or failure.

4.1.2 Tre cans would be tested under the conditions of section 1; however, all tests would be conducted at 90% RH. Tests would be stopped at eight hours and the percent leakage re orded at this time.

From evidence presented in the prtceding sections, results at 90% are not significantiv different from those at 100%.

4.1.3 The percent leakage values would be ccmpared to the spec.

limit of 1.0%, using the single spec. limit, variables unknown, standard deviation method of MIL-STD 414.

Acceptance would be based on this analysis.

4.2 Future.

Because the tests in section 4.1 are very time consuming and somewhat difficult to run for regular cuality assurance lot acceptance testing, we plan to do further testing on the GMR-I s

can in an attempt to reduce the time required for testing and also to simplify the test.

Parameters that will be investigated are:

Mr. Wayne Carr Pace Three Apiil 13, 1984 4.2.1 Increasing the challenge cencentration of CH,I in an effort to reduce the time to test. Under current cunditions, a test to completion might run 40 hours4.62963e-4 days 0.0111 hours 6.613757e-5 weeks 1.522e-5 months ; we would like to reduce this to about two hours.

If there were a simple, straight-line relationship between service time to a 1%

breakthrough and challenge concentration, it would indi-cate that a challenge concentration of approximately 200 pcm would be required' to do this. We wish to fimly establish the service time---challenge concentration re-lationship over a range of challenge concentrations from 1 ppm to 500 ppm.

4.2.2 Constant Flow vs. Cyclic Flow.

Constant flow tests are much simpler to conduct than cyclic flow tests. Frcm some preliminary infomation, it appears that constant flow gives similar service times as cyclic flow.

If, by further tests, this can be verified, constant flow would be used in lot acceptance tests.

4.2.3 Temperature and Humidity Effects.

Further tests will be run to study the effects of temperature and humidity on the perfomance of the GMR-I' can.

It would be preferable o

to test cans for lot acceptance at 25 C and 85% RH

_ )

(standardNIOSHconditions),ifitcanbeproventhatthese conditions are as severe as 43 C and 90% RH, or if a good correlation between these two conditions can be established.

5.

Conclusion.

5.1 Forty-seven G4R-I cans have been validly tested under the conditions specified in section 1.

All of these cans had service times well in excess of.12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . This compares to a desired service time of' eight hours.

5.2 There were 14 valid tests run on lot 4/f4/83.

Statistical analysis of this data, projected to 100% RH,110 F, indicate that over 99%

of the GMR-I cans in this lot have service times well over eight hours (15.8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months ).

Incidentally, from the data of Table 1, this lot appears to have the shortest average service time of the lots tested.

5.3 In light of sections 5.1 and 5.2, the GiR-I can should be considered qualified to give service times over eight hours under the con-ditions:

1%gbreakghrough, cyclic ficw (peak 192 LPM, average 64 LPM), 110 F (43 C) and 100% RH.

Mr. Wayne Carr Page Four April 13, 1984 5.4 Lot Acceptance will be determined by using MIL-STD-414, Level II, AOL 1%. The percent leakage at eight hours service time will be comoared to the spec. limit of 1.0%, using the single scec limit, variables unknown, standard deviation method of MIL-STD-414.

5.5 Further tests will be run studying the effects of challenge concentration, constant flow rate, temperature and humidity on the service time of GMR-1 cans. This program is intended to j

shorten the required test time and simplify the test procedure.

5.6 Frcm data in this investigation, it appears that relative humidity 1

i between 60 to 90% has little effect on service time of the GMR-1 canister.

Projecting the service time to 100% RH, using a log-log plot,. suggests that-the service times at 90% and 100% RH are not significantly different.

If you have any further questions, please do not hesitate to contact me Very truly yours,

$< b.

Wayde B. Miller, Jr.

4 Director of Product & Sales Planning i

/jw Attachments / Tables I and 2 cc: Mr. E. J. Beck Dr. W. P. King Dr. E. S. McKee Mr. J. C. Sheehan Mr. J. H. Wylie t

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Table 1.

Service Time of GMR-I Centsters Test Conditions: As given in section I s

60% MI Can i Mfg. Date Service Time Comment can #

Mfg. Date Service Time Comment min.

hrs.

min.

hrs.

Leak 912 hrs.II 5

11/30/83

>>720

>>12 0.25 34 4/14/83 1410 23.5 6

0.07 yk 35 2/2/84 1680 28.0 7

9.33 gl g 36 4/14/83 1530 25.5 29 2/2/84 2160 36.0 37 1410 23.5 30 2520 42.0 38 1/9/84 1890 31.5 31 2670 44.5 39 4/14/83 1080 18.0 32 4/14/83 1200 20.0 40 1/9/84 2220 37.0 33 1500 25.0 90% RH i

Leakage 3

11/30/83

>>l215 >>20.3 0.30 A

23 10/21/83 2490 41.5 4

>>1215 >>20.3 0.15 24 2910 48.5 8

10/21/83

>> 990 >>16.5 0.45 25 2490 41.5 9

0.25 10 26 2/2/84 1560 26.0 10 Leak 912 hrs.g 0.43 27 2070 34.5 l

11 11/30/83

>>720

>>12 0.67' 28 2220 37.0 12 10/21/83 0.04 0

41 4/14/B3 1230 20.5 13 11/30/83 0.47; sf 42 1320 22.0 14 1/9/84

>> 795 >> l3.3 0.64 43 1650 27.5 15 0.34 44 1320 22.0 16 0.35 45 1500 25.0 I7 1/9/84 1890 31.5 Const. Flow 46 1260 21.0 1

18 3180 53.0 47 Test invalid 19 2530 42.2 48 1350 22.5 20 9/13/83 2390 39.8 49 1290 21.5 21 1530* 25.5*

Tes t Stopped 50 840*

14.0*

Test Stopped 22 2280* 38.0*

No Breakthrou9h No Breakthrough i

4/26/84 r,

Tabla 2.

i Statistical Analysts of Lot 4/14/83 X (% RH)

Y (Sve. Time)

Los X Log Y 60 1200 min.

1.77815 3.07918 Ave. Y

= 1355 min. (22.6 hrs.)

i 60 1500 3.17609 69 60 1410 3.14922 Ave. Y90 = 1365 min. (22.7 hrs.)

60 1530 3.18469 60 1410 3.14922 i

60 1980 3.03342 i

90 1650 1.95424 3.21748 90 1230 3.08991 90 1320 3.12057 90 1500 3.17609 90 1260 3.18037 i

90 1350 3.13033 90 1290 3.11059 90 1320 3.12057 991 Prediction Interval for Log Y. given tog X = 2 (1001 RH) 995 Interval = $+t (1.99/d

-2 5h n

A lihere Y = bo + b X and bo = 3.08231, by = 0.02606 j

- 3.13443 (1362 min. 22.7 hrs.)

i sp-[s,2 [1 + 1/n + (X-@2 2,,gy_y

.05H3 sg j

g n-2 g

x = X-l l

991 Interval = 3.13443 i (3.055)

(.05543) - 3.13443 +.16934

= 3.30377 to 2.96509 t

Y = 33.5 hrs. to 15.4 hrs.

1 Revision 4/26/84 i

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TEST CONDITIONS

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4 Challenge Conc.:

5 - 10 ppni Cil 1 Ilusiidity:

60 t 31 and 90 t 3% 3(miniansa of six cans at each litsuidity)

Tempera ture:

Il00F Cyclic flow:

192 LPH for 0.02 sec.; o LPH for 1.64 sec.,

repeating tiils cycle ilirougliout tiie test.

Iliis gives a niinute volume of 64 L.

Breaktlirougli Conc.:

11 of tiie cliallenge concentration f

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Table 1.

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.Mf. Date Service Time Comment Can #

Mf9. Date Service Time Coiment

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9 4

min.

hrs.

min.

hrs.

1 l

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11/30/83 720 12 0.25I**

37 4/ 14/113 1410 23.5 i

6*

0.07 **

3 11 1/9/84 1890 31.5 7*

0.33 **

39 4/14/83 1080 18.0 i

79 2/2/84 2160 36.0 40 1 / 9 / 11 4 2220 37.0 h) 2520 42.0 57 3/211/84 2490 41.5

~11 2670 44.5 58 2280 38.0 i

12 4/14/83 1200 20.0 59 2610 43.5 1

13 1500 25.0 60 2460 41.0

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l 14 1410 23.5 61 2250 37.5 i

i 15 2/2/84 1680 28.0 62 2460 41.0

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16 4/14/83 1530 25.5 90% Rif l

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11/30/83 1215 20.3 0.30 **

26 2/2/84 1560 26.0 4*

1215 20.3 0.15 **.

27 2070 34.5 i

11

10/21/83 990 16.5 0.45 **

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0.25 **

28 2220 37.0 10*

0.43 **

41 4/l&/83 1230 20.5

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42 1320 22.0 II*

11/30/83 720 12 0.67 *

43 1650 27.5 l

12*

10/21/83 0.04 **

44 1320 22.0 i

13*

11/30/83 0.4 7 *

45 1500 25.0 l

l 14*

1/9/84 795 13.3 0.83 *

46 1260 21.0 l

15*

0.34 **

47 Test Invalid l

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0.35 **

48 1350 22.5

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11 1/9/84 1890 31.5 Const. Flow 49 1290 21.5 i

ltr 3180 53.0 50*

840 14.0 0.62**

l 19 2530 42.2 51 3/28/84 1650 27.5 0

9/13/83 2390 39.8 52 1800 30.0 4

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1530 25.5 0.44**

53 1620 27.0 I

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2280 38.0 0.09**

54 1530 25.5 j

'3 10/21/83 2490 41.5 55

't 1740 29.0 1

4 2910 48.5 56 ' ~

1620 27.0 5

2490 41.5 i

1 Test stopped before 11 breakthrou9h.

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f 5

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lure i

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t I

S et 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E

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... _. _ _. _..... _ _.. _ _...Page 2 of 2. _ _ _ ____ __ _

l v

,2 (X- ) (Y- )

+.00277 Y = b, + b, X I

b i0.02606 l

=

~

4 I (X-5)

.10629 i

3.13127

.02606 (1.87877)

= t3.08231 Y-bX a b

=

o I

I(Y-Y)/tt.-2 f

.00258

.03089/12 S

=

E

.00258e/.10629

.02391 N##

2 2

2 SE jf$

5 l

=

i.02391

.l5461 s

=

99% Conf. Limits on Slope b,

a

}

.02606 1 3.055 (.15861) b-1 L((1.99/ )]at-2 S i

=

2 g

+.49880,

.48 628

=

i' 99% Prediction intervals for Logy (Life) Given Log X = 2 h1 b tb x = 3.08231 t.02606(2) 7 t ((l.99/ )]At -2 5^ ; Y

=

2 g

y 4

= J[s 2.[i + 1/ + (x - i)2] =.0558 3 l

9-3.138.83 (22.7 nrs);

s g

y 2

j fx 3.138.8 3 2 3.055(.05543) = 3.30377 (u);

2.96509 (L) =

ll

~

i

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RECUIREMENTS FCR NIOSH APPROVAL FOR AN ORGANIC VAPOR CHIN CANISTER PER 30 CFR 11 i

Tes Concitions i

Challenge c nc. 5000 ppm CCl4 Test Humidity 50 - 5% RH Test Temaerature 25 + 2.50 C i

Flow 64 LFM for as received canisters 32 LPM for equilibrated canisters 1

Breakthrough conc. 5 ppm 3

Ecuilibration Conditions 3 Canisters as received.

2 Canisters equilibrated for 6 hrs., 64 LPM, 25 RH, Rocm Temo.

4, 2 Canisters equilibrated for 6 hrs., 64 LPM, 855 RH, Rocm Temp.

Total 7' canisters.

Service Time Recuirement 12 minutes.

No statistical requirements.

If 4

i all seven canisters have service times of 12 minutes or more, the canister is accroved.

t, I

L...

.. 2.

-~

-e

.e s

OO C

QW m

~

2 CD

=

= t mD U k

U2UM ma o

ww QC C=

0 6C E

=m

-T am a

- =

Mh Sw C-4 1 0M CC

=

2 5 ba a ww

-O cc L%

C C

1%

C 3 CM b4 C

>Ce C Cd GU U=

2 U

L2 3

"5 w

C

J c a

a =

5=

2d 3CO 0

=

uo

.-- eu e Qm%

e m a1 o

u%

Cd %d U*

C C@ LC U>

-.U Q

Oc W

e UC u%@ %

m%

a m*

U QU Q 1

U LC%

U%

K Z*'

ec m=ou 2%

C=~

~m D

h C

D C

D N

N J

w

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L m

Cm>

QCm b

QN Gh M 9=

M w

aw mC e

a m W

G CaC"

%m>

2 55 C

5C Q

QC

~7%c

% am 4

am M-6U C CC w

134 1

3

~5

=

8

'_a y

S C EC v

CC C3 CCm

=

C U

ON O

CC UM-m5 CE I

._)

<f s.n.~ G

=

U U:.a imy

=

e Cma @

aP wl C

=w:

4C W =

4 CC-MW m" MAC Emm e C em C

m L

23 32%

o u C4 C W

MC%

C M

.C 7C Q

3=m C

L-CCa%

% 0 L

JOC 3

4 4 eMa C

OC M

Q>

=

<-C TCOM 3

U s.

tu cmco

-m g

C C w

79 44 W

C C

C

~Um MM %

>~M N

C C

C

~

' C C

m G

C

~La UmCM 5-C O w

U m C= 3 M'

C C

=

-O G S U G-C m

C M

C c

U CQ b o c

3 W

s a

e s

C C

C

=

u aw d

M =

a Cwc U cm cuc a

C C

'C C

C am 7=OS QQU M

m C

m N

cd

-7 cm

-LC

-w C

3CXQ m1 M

CCQ u v

-C 3U U CUK Q-C ww m C

M Q m

Umu CM-Cad C 6 CU F C7 4

CC C=<

Ag u UTQ-am t um m UM J

m C3 QU CCW

~%

U 20 % U 22m KC%

W 3km

&dM N

m N

M.

M Y

Y Y

i

[

i 1

l L.

~

E.UJ.IPLE OF LOT EVALUATION PER MIL.-STD-414 SINGLE SPECIFICATION LDtIT - FORM 1 VARIA3ILITY UNKNOWN - STANDARD DIVIATION METHOD (REF. PACE 37)

LEVEL II AQL = 1.0 SPEC. LIMIT 1.0%

LOT SITE - 500 CANS SAMPLE SIZE (TABLE A ' 3-1)

7 (U) 2 TEST RESULTS:

8 EOUR 3REAKTHEOUGH CAN #

CONCENTRATION (%)

4L

.036 42

.028 43

.019 44-

.064

)

45

.027~

46

.035 49

.170 SA!!PLE 1*lci =.06129 (2)

ESTD! ATE OF LOT STANDARD DEVIATION =.05354 (s) t

/

THE QUANTIIT (U-5)/s = 1.00

.06129 = 17.23

.05354 ACCEPT 3ILITY CONSTANT (k) = L.61 (TASLE 3-1)

LOT 1EETS ACCEPTABILITY CRITERION SINC ~ U-5/s> k m

l i

f

__ m 3 -

)

SAFEIV,FEAlllRES Billt I IN,!0 IllE PLAN 1.

Flow Rate:

64 LpH ----- a person could not possibly breath at this rate for 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months .

Probably at least twice the average rate.

2.

8 Ilours Service Time ------

this is probably double the actual use time required.

3.

Actual Service Times ------ minimum of 20 liours ----- 2-1/2 times the required 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months .

==

Conclusion:==

Would need a catastrophic failure for a can to not give proper protec tion ----- No destructive test sampling plan will pick up such a failure.

5 0

9 9

. l e

I i'

Pt ANNfD filltJRE WORK I

l Tlie following parameters will !)e furtlier investigated to give additional support to i

tiie foregoing conclusions and proposals, and to develop a tietter lot acceptance plan.

l 1.

Cliallenge concentration:

1, 10, 100, 250, 500 ppu 2.

Ril/T 1C All mg/l 5

15 25 34 43 4.5 66 35 19.5 12 7.5 9

70 39 24 15 18 79 49 30 36 97 60 54 90 Humliers in tiie tatile are tiie relative liumidity percentages corresponding to il;e alisolute

\\

liumidi ty/ tempera ture condi t ions.

3.

Rate of flow: 16, 32, 64 LPH 4.

Cyclic vs. Constant flow.

i

.'. I 4

StelHAltY 1.

Data supports approval of the Chit-I can for its intended use.

I 2.

The proposed acceptance plan will assure quality of future lots.

3.

Furtlier work will be done to:

3.1.

Support tiie conclusions drawn in 1 and 2.

3.2.

Improve the lot acceptance plari by:

3.2.1 Reducing the time requi. red for testing and running the canisters to a 1% breakthrougli service time.

3.2.2 Simpli fying the test procedure.

. ;

ML20133N670

Text

Dear Mr. Denton:

Dear Mr. Carr:

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