ML19221B273

For Comment Issue of Reg Guide 1.140, Design Testing & Maint Criteria for Normal Ventilation Exhaust Sys Air Filtration & Adsorption Units of Light-Water-Cooled Nuclear Power Plants

ML19221B273
Person / Time
Issue date:	03/31/1978
From:	NRC OFFICE OF STANDARDS DEVELOPMENT
To:
References
REGGD-01.140, REGGD-1.140, NUDOCS 7907200137
Download: ML19221B273 (8)

Text

glJ MGQ 8

U.S. NUCLEAR REGULATORY COMMISSION March 1978

@ M REGJX'ORV GUD DE

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OFFICE OF STANDARDS DEVELOPMENT REGULATORY GUIDE 1.140 DESIGN, TESTING, AND MAINTENANCE CRITERIA FOR NORMAL VENTILATION EXHAUST SYSTEM AIR FILTRATION AND ADSORPTION UNITS OF LIGHT-WATER-COOLED NUCLEAR POWER PLANTS A.

INTRODUCTION This guide presents methods acceptable to the NRC staff for implementine the Commission's reculations G,eneral Design Criteria 60 and 61 of Appendix A.

in 10 CFR Part 50 and in Appendices A and I to

'o

" General Desien Lnteria ior Nuclear Power Plants' CFR Part 50 with regard to the design, tesone, and to 10 CFR Part 50, ' Licensing of Production and maintenance criteria for air tiltration and adsorption Utilization F.acilities. require that filtering systems be units installed in the normal ventilation exhaust sp-included in the nuclear power unit design to co, trol tems of light-water-cooled nuclear power plants. Th s i

suitably the release of radioactise mate ials in gase-euide applies only to atmosphere cleanup sy stems de-ous etfluents du-ing normal reactor operation, includ-

' signed to collect airborne radioactise materials during ine anticipated operational occurrences and fuel stor-normal plant operation, including anticipated opera-age and handlin; operatmns. In addition, ss50.34a.

tional occurrences, and addresses the atmosphere

, Design objectises for equipment to control releases cleanup sy stems, including the sarious components of radioactis e material in ef fluents-nuclear power and ductwork in the normal operating ensironment.

reactors.' and 50.36a, ' Technical specif..ications on Th.is guide does not apply to pos taccid e r.1 ettluents f. rom nuclear power reactors, of 10 CFR encinee red-safety-feature atmosphere cleanup sss-Part 50 require that means be employed to ensure tha:

tems tiat are des.gned to mitigate the consequences release of radioactise material to unrestricted areas of postu.ated accidents. Repulatory G..de 1 5,.

ui during normal reactor operation, including expected

. Design. Testing, and Maintenance Criteria f or I,ost-operationd xcurrences, is kept as low as is rea-accident Engineered-Safety-Feature Atmosphere sonably achies able.

Cleant p System A.ir Filtration and e.u! sorption Units Appendix 1. "N.umerical Guides for Design Objec-of I.ight W.ater-C,ooled N,uclear I,ow er I,lants, pro-tis es and 1.imiting Conditions f.or Operation to Meet vides 2uidance for these sy stems.

the Criterion ' As 1.ow As Is Reasonably Achievable ~

for Radioactise Material in Light-Water-Cooled Nu-B.

DISCUSSION clear Power Reactor Effluents, ' to 10 CFR Part 50 prosides guidance and numerical values for design Particulate filtration and radioiodine adsorption objectises to help applicant 3 for, and holders of, units are included in the design of the ventilation licenses for nuclear power plants meet the require-e.. hat st systems of light-w ater-cooled nuclear power ments of H50.34a and 50.36a. Appendix I requires plants to reduce the quantities of radioactise mate-that each light-water. cooled nuclear power reactor rials m gaseous elfluents released from building or unit not exceed an annual dose design objectise of 15 conta nment atmospheres during normal operation.

mrem to any organ of any individual in an unre-including anticipated operational occurrences. All stricted area via all exposure pathways from airt'orne such cleanup systems should be designed to operate tr'.oactive iodine and particulate releases. Appendix continuously under r-la! ens ironniental conditions.

I also requires that adJitional radwaste equipment be 1 ' tlis guide. clt...ap s3 stems that should operate provided if the equipment has renonably demon-to meet the 'as low as is reasonably achievable ~

strated technology and the cost-benefit ratio is fas or-guidelir.es of Appendix ! to 10 CFR Part 50 inside the able.

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nated as primary sy stems ' Primary sy stems gener-cred during design and operation. As erage temper-ally include a contamment cleanen sy stem (kiJney atere and relatise humidity also sary f60m site to site, filtration sy stemi Sy stems that operate outside pri-and the potential buildup of moisture in the adsorber mary containment are designated as 'secor.dary sy s-w arra nt s equal design consideration. The ettects of temt Secondary systems gener:dly inch le Jeanup these factors on the atmosphere cleanup system can systems installed in the sentilation extlaust sy stems be determined by scheduled testing during operation.

f or the reactor buddmg, turbine building, radwaste All components of the atmosphere cleanup system building. auxiliary building, mechanical s acuum installed in normal sentilation exhaust systems need punp, main condenser air ejector, and any other re-to be designed for reliable performance under the ex-lease points that may tontain particulates and gaseous pected operating conditions. Initial testing and proper radioiodine sneciet in some instances, filtration maintenance are primary factors in ensuring the relia-equipment installed in a postaccident hy drogen bility of the systent Careful attemion during the de-purge exhaust sy stem may be designed to the recom-sign phase to problems of system maintenance can mendations of this guide, e p., where a remos al elfi-contribute signit'icantly to the reliability of the sy stem ciency of 40'< or less for radioiodine species is suf fi-by increasmg the ease of such maintenance. Of par-cient f or the hydrogen purge exhaust system wSen the ticular importance in the design is a layout that pro-sum of the calculated hns-of-coolant accident sides accessibility and sult~cient working space so

( l.OC A ) dose and L.

post-1 OCA hy drogen purge tnat the required functions can be performed saf ely.

dose is less than the guideline values of 10 CFR Part Periodic testing during operation to scrity the effs-100 ciency of the components is another important means Normal ensironmental conditions that these atmos-of ensuring reliability. Built-in features that w ill phere cleanup systems should withstand are inlet facilitate consenient in-place resting are important in concentrations of radioactive iodine in the range of sy stem design.

10 ' t o 10 ' pCi enf relatne humidity of the in-Standards f or the design and testing of atmosphere fluent stream up to 1005, temperatures of the in-cleanup systems include ANSI /ASME N509-1976, tiuent stream up to 125T (52 CL and atmosphenc

' Nuclear Power Plant Air Cleaning l' nits and Com-pressure lhe system should be operated in such a ponents' t Ref.11 and ANSI N510-1975, ' festing manner that radiation levels of airborne radiaactn e of Nuclear Air Cleaning Sy stems' (Ret. 2L matenal and radioiodine buildJp on the adsorber do Other standards are as ailable f or the constructica not deletenously af fect the operation of the filter sys-and testing of certain components of systemt Whe'e tem or any component.

such stand; -ds are acceptable to the NRC staff, they An atmosphere cleanup system installed in a nor-are referenced in this guide. Where no suitable stand-mal s enulanon exhaust sy stem consists of some or all ard exists, acceptable approaches are present. d in of the f ollowing components: heaters or cooling coils this guide. ER DA 76 -21,

' Nuclear Air Cleaning used in toniunction with heaters, prefilters, high-llandbook' ( Ref. 31, prosides a comprehensis e re-particia e air tilEPA n fi!ters, iodine ad-siew of air tiltranon sutems. It is noi a standard but ethciency r

~

sorpron un ;, tins. and associated duct w ork, dam-a guide the discusses a number of acceptable design pers. and instrmacntation. licaters are dnigned to alternatis e t heat the influent stream to reduce its relatae humid-Not all of the documents mentioned in ANSI ity bef ore eaches the filters and adsorbert ilEPA N509-1976 (Ret 1 L ANSI N51W1975 (Ref. 2), or filters a rt nstalled to remos e particulate matter, other standards referenced in this guide base been the which may be raJioactne. and ' ass the air stream to

bject of an esaluation bs the NRC staf f as to their the adeber. T he adsorber remos es ga seou s iodine applicabil or acceptabihty. It should be noted that telemental iodine and orgame iodiJeu f rom the air ANSI N509-1976 and ANSI N510-1975 ref er to stre.m. IIEPA tilters downstream of the adsorber O R N L-N S IC-65. -Design, Construcnon and Testing umts collect tarbon lines and proside redundant pro-of thgh-Etticiency Air I iltranon S stems 'or Nuclear 3

tecnon ag.unst particulate release in sase of tailure of Applicanon' (Ref. 4 L w hich has been replaced by the upstream IIEPA tilter bank. The fan is the final ERDA 7621 (Ref 3 item in an atmmphere cleanup sptem Consideration should be gn er to installing nrehlters upstream of C.

REGULATORY POSITION the !! EPA hhers to redute the particulate load and Section 2 of ANSI N509-1976 t Ref I)and Sec-mtend their sers ice hte.

tion 2 of ANSI N510 19751Ref 2) list additmnal Ihe ensironmental history will attect the perform-documents referred to in these standards lhe specific arme of the atmosphere cleanup sy stem. Industnal applicability or acceptabihty of these listed docu t o nt.mu na nt s, pollutants, temperature, and relatis e ments. as well as documents listed in other standards hunudity contnbute to 'he aging and weathering of ref erenced in this gmde, has been or will be cos ered tilters and adsorbers and redute their capability to se; arately in other regulatory guidet where appro-perf orm their intended functiont Therefore, aping, pr: ate.

weathering. and poisomng of these components.

Where ref erence is made to ()RNI. NSIC 65 a Ret.

w hich may s ary f rom site to site. need to be consid-

4) in ANSI N509 -1976 and in ANSI N510 1975.it 1 140M~

158 35<-3

should be interpreted to mean the corresponding por-should be designed to control leakage and facilitate maintenance in accordance with the guidelines of tion of ERDA 76-21 (Ref. 3)

Regulatory Guide S.S. "Information Relesant to En-

1. Ensironmental Design Criteria suring that Occupational Radiation Exposures at Nu-clear Power Stations Wil' ile As low As Is Rea-

a. The Jesign of each atmosphere cleanup sys-g

.g.,(Ref.5L tem installed in a normal sentilation exhaust system

- Outdoor air intake openings should be e

should be based on the maximum anticipated operat-equipped with lousers, grills, screens, or similar pro-ing parameters of temperature, pressure, relative tectise desices to minimize the effects of high winds, hunudity, and radiation les els. The c:eanup system g

g shou'd be designed based on continuous operation for operatian of the system. If the a'mosphere surround-the expected lif e of the plant or the maximum antici-ing the plant could contain significant ensironmental pared sersice life of the cleanup sy stem.

contaminants, such as dusts and residues from smoke

b. If the atmosphere cleanup system is located m.

anup spems Rom adjacent coal burning power an area of high radiation daring normal plant opera-plants or industry, the design of the system should tien, adequate shielding of. components from the cons der these contaminants and prevent them from radiation source should be provided.

affecting the operation of any atmosphere cleanup

c. The operation of any atmosphere cleanup sys-tem in a normal ventilation exhaust system should not

f. Atmosphere cleanup ssstem housings and deleteriously aficct the expected operation of any ductwork should be designed 'to exhibit on test a engineered-safety f eature system that must operate ma(mum tota! leakace rate as defined in Section af ter a design basis accident.

4.12 of ANSI N509-1976 (Ref.1). Duct and housing

d. The design of the atmosphere cleanup system leak tests should be performed in accordance with the should coruider any significant contaminants such as k ons of Sect:an 6 of ANSI N510-197f (Ref. 2).

Justs, chemicals. or other particulate matter that could deleteriously af fect the clearap system s opera-tion.

3. Component Design Criteria and Qualification

2. System Design Criter:a Testing Atmosphere cleanup systems installed in

a. Adsorption units funston ef ficiently at a rela-a.

9 dundant nor designed to se:smic Category I classifica.

normal sentilation exhaust systems need not be re-tis e humidity of 709 or less. If the relative humidity of the incoming atmosphere is expected to be greater

' ion, but should consist of the following sequential than 709 during normal reactor operation, heaters or somponents: (1) llEPA filters before the adsorbers, cooling coils used in conjunction with hear:rs should C)ioJine adsorbers (impregrated activated carbon or be designed to reduce the relatise humidity of the in-eauivalent adsorbent such as metal zeolites), (3) coming atmosphere to 700. heaters should be de-ducts and dampers, (4; fans, and (5) related in-signed, constructed, and tested in accordance with strumentation. If it is desired to reduce the particulate the requirements of Section 5.5 of ANSI N509-1976 load on it.e llEPA filti rs and extend their sersice life, (Ref.1) exclusive of sizing criteria.

the installation of pr: filters upstream of the initial

b. The HEPA filters should be designed, con-IIEPA bank is suggesed. Consideration should also structed, an j tested in accordance with the require-be ginn to the installation of a llEPA filter bank ments of Section a.1 of ANSI N509-1976 (Ref.1).

downstream of carbon adsorbers to retain carbon Each IIEPA filter should be tested for penetra:.on of fines. Heaters or coolinc cails used in conjunction dioctyl phthalate iDOP)in accordance with the prosi-with heaters shodd be us:d when the humidity is to sions or MllcF-5106S (Ref. 6) and MIL-STD-2S2 he controHed bef ore filtration.

(Ref. 7L b.

The solumetric air flow rate of a single

c. Filter and ad,orber mounting frames should cleanup train should be limited to approximately be designed anJ constructed in accordance with the 30,00 i tt Vmin. It a total system air nov in excos pros i sion s of Section 5.6.3 of ANSI N509 '.976 of this rate is required, multiple trains shedd be (Ref. IL used for ease of maintenance, a fih r lay out the - is

d. Filter and adsorber banks should be arranged thice liEPA filters high and ten wide is preferred.

in accordance Rh the recommenJations of Section

c. Each atmosphero cleanup swm should be 4.4 of ERDA 76-21 (Ref. 3 L locally instrumented te monitor and elem pertinent

e. System tilter housings, including tloors and pressure drops and flow rates in accerua ' with the doors, and electrical conduits, drains, and piping in-s'aMed inside filter housings should be designed and recommendations of Section 5.6 J ER DA '/ o

'a (Rcf.3) constructed in accordance w-th the Prosisions of S':e-

d. fo maintain the radiation expo "re to operat-tion 5.6 of ANSI N509-1974 (Ref. It ing personnel as low as is reasonabiy _hivable dur-f Doctwork associate,i with the atmosphere ing plant maintenance, atmosphere cleanup 'ystems cleanup system should be de.igned, constructed, and 158 356 I P)-3

tesed in accordance with the provisions 01 Section nent test probes with external connections in accorJ-5.10 0f ANSI N509-1976 t Ref. I t ance with the prosisions of Section 4.11 of ANSI

g. The adsorber section of the atmosphere N509-1976 (Ref.1).

cleanup system may contain any adsorbent material

d. The cleanup components (e.g.

HEPA filters demonstrated to remose gaseous iodine (elementa:

and adsorbers) should be installed after construction iodine and organic iodides) from air at the required is completed.

etticiency. Since impregnated activated carbon is commonl3 used, only this adsorbent is discussed in

5. In-Place Testing Criteria this guide. Each original or replaceme it batch of im-

a. A s Nal insp on of the atmosphere cleanup pregnated actisated carbon used in the adsorber sec-tion should meet the qualification and batch test re-ytem and ay awdated wmponenh douM N matk More each m-place airflow distribution test. DOP suits immarized in Table 1 of this guide.

test, or actisated carbon adsorber section leak test in If an adsorbent other than impreenated actisated anordance with the prosisions of Section 5 of ANSI carbon is proposed or if the mesh size distnbution is N510-1975 (Ref. 2 L ditterent f rom the specaications in Table 1, the pro-

b. lhe airflow distrDution to the HEPA tilters posed adsorbent should have demonstrated the capa-and iodine adsorbers should be tested inplace for bility to perf orm as well as or better than actisated carbon in satisfyine the specifications in Table 1. If uniformity initially and after maintenance affecting the flow distribution. The distnbution should be impregnated actisated carbon is used as the adsor-w ith.in 3 2 fh, of the as erage flow per unit when bent, the adsorber sptem should be doiened for an aserage atmosphere residence time of 0$25 see per tested in accordance with the prosisions of Section 9 of Industrial \\ enulation t Ref. S) and Section S of two inches of adsorbent bed' ANSI N510-1975 (Ref. 2)

h. Adsorber cells should be desiened, con-structed, anJ tested in accordance with the require-

c. Fhe in-place IX)P test for HEPA filters should mnform to non 10 of ANSI N510-1975 q Ret. 2 L ments of Section 5.2 of ANSI N509-1976 (Ref.1).

HEPA filter sections should be tested m place ini-

i. The mtem tan and motois mounting, and ductwork cInnections should be asiened, con-haHy and at a frequency not to esceed 18 months atahn ng a etf ulett mador auMown k ao structed, and tested in accordance with the require-ceptablet The HEPA filter bank upstream of the ad-ments of Sections 5.7 and 5.8 of ANSI N509-1976 g,g ;

sorber section should also be tested following paint-ing, hm, r chemical release in any sentilation zone 1 Ihe tan or blower used in the atmosphere cleanup mtem should be capable of operating under wmmunmanng with the sprem in such a manner that the IIEPA filters could become contaminated f rom the ensironmental conditions postulated.

the f umes, chemicals, or foreign aterials. DOP

k. Ducts md housines should be laid out with a minimum of i :dges, protrusions, and crevices that I.enenanon n' of aH HEPA f.lter banks should con-firm a peeon of less than 0.05'r at rated flow. A coulJ collect d st and moisture and that could impede r on mtem sansfying th.is condition can be con-personnel or cr ate a hazard to them in the perform-ance of their wt rk. Straichtenine vanes should be in-pu m wmnt a m mmosal uG'wney Jor pan ocuMet WA hhas that fah m satMy the in-plan stalled where r quired to ensu're representate e air flow measurem nt and uniform flow distribution test saia douM be mplad w6 Mas qualified through cleanup omponents.

punuant to Ngulatory position C.3.b of this guide. If

1. Dampers s iould be designed, conuructed, and the HEPA filter bank n er.orely or only partially re-tested in accorda ice with the prosisions of Section placed, an in-place DOP test sh uld be conducted.

5.9 of ANSI N509-1976 (Ref.1).

U any w ng mpam am nenwan on, within, or adjacent to the ducts, housing, or mounting frames, the filters and adsorben should be remos ed 4, Maintenance from the housing during such repairs. Ihese repairs

a. Accewibility of components and maintenance should be completed prior to periodic testing, tilter shoulJ be considered in the design of atmosphere inspection, and in-place testing. The use of silicone cleanup systems n accordance with the prosisions of scalants or any other temporary patching matenal on i

Section 2.3.S of ERDA 76-21 (Ref. 3) and Section filters, housing, mounting frames, or ducts should J.7 of ANSI N509-1976 (Ref.1).

not be allowed.

b. For ease of maintenance, the system design

d. The actisated carbon adsorber section should be should pros ide f or a minimum of three feet fmm leak-tested with a paseous haloger.ated hydrocarbon mounting frame to mounting frame between banks of refrigerant in accordance with Section 12 of ANSI components. If components are to be replaced, the N510-1975 (Ref. 2) to ensure that by pass leakage dimensions to be provided should be the maximum through the adsorber section is icw than 0.054. After length of the component plus a mimmum of three the test is completed, air flow through the unit should feet be maintained until the residual refrigerant pas in the

c. The sptem design should proside f or perma-effluent is lew than 0.01 ppm. Adsorber leak testing 1.14 1-4

should be conducted (1) initially. (2) at a frequency service life. The design of the samplers should be in not to exceed 18 months thereaf ter (during a sch-d-accordance with the prosisions of Appendix A of 9

uled reactor shutdown is acceptable), (3) f ollowing ANSI N509-1976 (Ref. 1 ). Where the system acti-remosal of an adsorber sample for laboratory testing sated carbon is greater than two inches deep, each if the integrity of the adsorber section is af fected, and renresentatis e sampFng station should consist of q4) following painting, fire, or chemical release in enough two-inch samples in series to equal the thick-any sentilation zone commumcating with the system new of the sy stem adsorbent. Once representatise in such a manner that the charcoal adsorbers could samples remosed f or laboratory test, their posi-become contaminated f rom the tumes, chemicals, or tions in th. samphng array should be blocked of f.

f oreign materials.

laboratory tests of representatis e samples should be conducted as indicated in Table 2 of this guide,

6. Laboratory Testing Criteria for Actisated v.ith the test gas flow in the same direction a-the Carbon flow during sen ice conditions. Simdar laboratory tests should be performed on an adsorbent san

• be-

a. The actisated carbon adsorber section of the fore hadine into the adsorbers to establish an initial atmospf ere cleanup sy stem should be assigned the peint :or comparison of f uture test results. The acti-decontamination ef ficiencies gisen in Table 2 for s ated carbon adsorber section should be replaced radioiodine it the following conditions are met:

with new unused actis ated carbon meetine the phs si-t Ii fhe adsorber section meets the condition >

cal properts specifications of Table I if t 1 J testinh n

~

gis en in regulatory position C.5.d of this guide accordance with the f requenes specified in Footnote c (2) New activated carbon meets the physical of Table 2 resuhs in a repesentatne sample failine te property specifications given in Table 1, and pass the applicabh test in Table 2 or (2) no repre en-(3) Representative samples of used actis ated tative sample is available f or testing.

carbon pass the laboratory tests pn en in Table 2.

It the actiuted carbon fails to meet any of the D. IMPLEMENTATION abus e conditions, it should not be used in aJsorption umts.

The purpose of this section is to proside informa-

b. The ef ficiency of the actisated carbon ad-tion to applicants and licensees regarding the NRC sorbe section shoulJ be determined by laboratory staff's plans for using this regulatory guide, tesung of repre'entaine samples of the actiuted car-TLs guide reflects current NRC staff practice.

9 bon exposed simultaneously to the same senice con-which the appli-Therefore, except in those cm..

a ditions as the adsorber section. Each representatise cant or licensee proposes an as "able alternatise sample should be not lew than two inches in both method f or complying with specified portions of the length and diameter, and each sample should hase the Commission's reg u latio 1s. the method described herein is being and will continue to be used in the same qualification and batch test characterist.;s as the system adsorbent. There shoulJ be a sufficient culuation of submittals for operating license or con-number of representatise samples located in parallel struction permit applications until iis guide is re-with the adsorber section to estimate the amount of sised as a result of suggestions from the pablic or penetration of the sy stem adsorh.t throughout it s additional statf resiew.

b 1.140 5

TAllI.E I PilYSICAL PROPERTIES OF NEW ACTIVATED CARllON llATCll TESTS

• TO IIE PERFORMED ON FINISIIED ADSORIlENT Acceptable Test Te u Slethod Acceptable Re.wlts I. Patricle size distribution ASTN1 D2S62 (Ref. 9)

Retained on #6 ASTN1 Ellh g g.

0.Or';

Retained on #8 ASTN1 Ellh Sieve: 4.0'T max.

Through #S, retained on # 12 Siese: 40'? to 60')

Through # 12, retained on # 16 Sieve: 40'i to 60'I Through # 16 ASTN1 ElIb Sieve: 5.0'i max.

h Through # 18 ASTN1 Ell Sieve 1.0'3 mt

2. liardnew number RDT N116-IT, Appendix C (Ref.10) 95 minimum

3. Igmtinn temperature RDT N116 IT, Appendix C (Ru.10) 330 C minimum at 100 fpta

4. CCI, Activity' CCI, Activity. I'DT N1l KIT. Appendix C (Ref.10) 60 minimum

5. Radioiodine remosal ef ficiency

a. Elemental iodine.

RDT N116-IT 99.5 25 C (Ref.10) and 959 relatne p.ra. 4 5.1, e xcept humidity 95'i relative humidity air is required

b. Niethy l iodide. 25'C RDT N116-IT (Ref.10) 95'1 and 955 relatise para. 4.5.3, except humidity 95'i relative humidity air is :equired

6. Ilulk density ASTN1 D2854 (Ref.11) 0.38 g/ml minimum

7. Impregnant content State procedure State type (not to exceed 5'1 by weight)

• \\ bak h rest

's a te st made on a production batc h of a product to esiahinh suitability for a specific application. A "batc h of i

a tnated carbon is a quantity of material of th; same grade, type, and series that has been nomogenized to exhibit, within reason-able tolerante, the same performance ar:d physical tharacteristics and for which the manufacturer can demonstrate by acceptable tests and quality t ontrol prac tites sus h unif ormity All in ateria: in the same harth should be a,.tn ated, impregnated, and otherw he treated vJer the sarre process tonditions and proccJares in the ume pros ess equrpment and should be produccJ under the same ruanuf actur-irp release and instructions Ntaterial produccJ in the ame cha ge of bar h equipment const. utes a batch; material produced in driterent charges of the ume bahh etpipment should be incluJ:d in the sarne b. itch enly if it can be homogenried as abme. The rv.nimu m bah h site should be 350 f t' of atin ared carbon

• see Ref erent e 12 l his test sh. u!J be perf ormed on bec material 1.140-6

(

TABLE 2 9

LABORATORY TESTS FOR ACTIVATED CARilON A nigned Aenvated Carbon k tivated Carbon" f)econtamination Eficiencies 1.aboratory Tests for a Hed Depth

• For Radioindine Representative Sunple" 2 inches. Air filtration 90G Per Test 5.b in Table !

I system designed to operate for a methyl iodide pene-inside primary containment.

tration of less than 10'i.

2 inches. Air filtration 70' ;

Per Te-t 5.b in Table I sy stem designed to operate at a relatise humidity of outside the primary contain-70'i for a methyl iodide ment, and relative humidity penetration of less than is controlled to 70'1 107.

4 inches. Air filtra9n 909 Pet Test 5.b in Table 1 at system designed to operate a relative humidity of 70G outside the primary contain-for a methyl iodide pene-ment, and relative humdity tration of less than 107.

is controlled to 70'4.

6 inches. Air fi;tration 994 Per Test 5.b in Table 1 at sy stem designed to operate a relative humidity of 70'l outside the primary contain-for a methyl iodide penetra-ment, and relatise humidity is tion of less than 19.

controlled to 704.

The actisared carbon, when new, should meet the specifications of regulatory posnion C 3 g of this guide 9

• 'h stultiple beds, e g, two 2-inth heds in series, shoulJ be treated as a single bed of aggregate depth.

see reoulatory poution C 6 h for defimtion of representarne sample Testing should be Performed (1) innially, q 2) at a f requency not to exceed 18 months (during a scheduled reastor shutdown is acceptable), and t 3) following painnng. fire, or chemical release in any senolation zone communicating with the system in such a nanner that the charcoal adwrbers could become coniaminated f rom the f umes, chemicals. or foreign matenals.

REFERENCES

1. American National Standard ANSI /ASN1E N509-

5. Regulatory Guide 8.8, "Information Relevant to 1976, 'Neclear Power Plant Air Cleaning Usats Ensuring that Occupational Radiation Exposures and Components." Copics may be obtained from at Nuclear Power Stations Will Be /.s Im s As is the American Society of Nicchanical Engineers, Reasonably Achievable.

• Of fice of Standards United Engineering Center, 345 East 47th Street.

Development, U.S. Nuclear Regulatory Commis New York, N.Y.10017.

sion.

6. N11L-F-51068, Filter, Particulate High-

2. American National Standard ANSI N510-1975,

" Testing of Nuclear Air Cleaning Systems, Efticiency, Fire-Resistant (latest edition), Niib-American Society of Niechanical Enginee'rs.

tary Specification. Copies may be obtained from the Naval Publications and Forms Center 3X01

3. ER DA 76-21, ' Nuclear Air Cleaning Hand-Tabor Ave., Philadelphia, Penn.19120 book.

Oak Ridge National Laboratory, C. A.

7. NHL-STD.282, " Filter Units, Protective Cloth-Burchsted, J. E. Kahn, and A. B. Fuller, N1 arch ing, Gas-N1ask Components an.i Related Products:

31, 1976. Copies may be obtained from the Na-Performance-Test Niethods, ' N1ilitary Standard, tional Technical Information Service, Springfield, 28 Stay 1956. Copies may be obtained from the Va.2216i.

aJdress gisen in Reference 6.

8. American Conference of Gosernmental Industrial

4. ORNL-NSIC-65, ' Design, Construcaon, and Testing of High Efficiency Air Filtration Systems Hygienists, " Industrial Ventilation,' 14th Edi-for Nuclear Application," Oak Ridge National tion,1976. Committee on Industrial Ventilation, Laboratory, C. A. Burchsted ano A. B. Fuller, P.O. Box 453 Lansing, 3.1ich. 48902.

Jan iary 1970. Copies may be obtained from the

9. ASTN1 D2862-70, " Test for Particle Si/c Distnbu-National Technical Information Sersice.

tion of Granulated Activated 0 rbon.

Copies 158 360 1.140-7

may be o'tained f rom the American Society for

11. ASTA1 D2854-70, ' Test for Apparent Density of Testing and Alaterials, 1916 Race Street, Activated Carbo i," American Society for Test-Philadelphia, Penn.19103.

ing and Afaterials.

10 RDT Standard A116-lT, " Gas-Ph.,e AJsorbents for

12. ASTA1 Ell-70, " Specifications for Wire Cloth Trapping Radioactise lodine and lodine Com-Sieves for Testing Purposes,' American Society pounds, ' USAEC Dnision of Reactor Research and for Testing and Staterials.

Development, October 1973, Oak Ridge, Tenn.

37S30.

O NuctEAH HtrULATORY COVWSSION a

P O S T A G E. ANDFEESPARD

).

AAsmN> TON c. c. 205%

US N U C L E. A H HiGULATOHV C O M M B 5 51 O N DF F ICs AL t1USI N ' E S PE N ALT Y F U H i' H I V A T t GE,5 300 j

158 361 g