ML19210A501

Exposure of Individuals to Concentrations of Radioactive Matls in Air in Restricted Areas, 10CFR20.Controls Internal Occupation Exposures to Radioactive Matls, Including Provision for Use of Protective Equipment

ML19210A501
Person / Time
Site:	Crane
Issue date:	11/23/1976
From:	Chilk S NRC OFFICE OF THE SECRETARY (SECY)
To:
Shared Package
ML19210A492	List: ML19210A491 ML19210A501
References
NUDOCS 7910300539
Download: ML19210A501 (3)

Text

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s RULES AND REGULATICNS f

1 af a related manual oT respirstcry prn-tection against radioactave matettals waJ also announced in the notice of proposed

^

• gule making.

Interested persons were invited to sub-allt written comments or suggestions for considertWon in connection sith the proposed amendments by Octooer 7.1974.

and the comment period was cztended.

1Epon request. to November 8,1974. In addition copies of the draf t guide ara manual were provided is response to re.

quests.

Ihmg and related regulatory fune-tions of the AEC were transferred to the NRC pursuant to section 201 of the En.

argy Reorgani:stion Act of 1974.

Af ter consideration of the comments received and other considerations, the Nuclear Regulatory Commission has adopted the proposed amendments to Part 20 published Ior comment, with cer-tain ciartfying modifications and edito-ytal changes. The more important thanges, based largely on the comments received, are summar:ced as follows:

Since the limits on exposure to air-borne radioactive matertals are now ex.

pressed in terms of !ntaxe,o! such mate-rials into the body. it was suggested that reference be made in the regulatics (120.103(a)(1)) to some standardi:ed bases for estimating intake. Accord:6cly.'

the efective rule includes a reference to an NRC Regulatcry Guide on acceptable

• concepts, models, equations and assump.

S tions for a bioassay prugram (Regulatory

• 5 ".'

Oulde 8.9).

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'Ibe intake limits for certain mixtures

. of uranium in soluble for:n (1:0.103(a)

(2)) h&ve been changed teconform w.th those adopted by the Atomic Energy Commissics on July 29,1974 c3 FR 23990).

Licensees may, tmder the amended regujation, ordinarily control exposures

• to radioactive materials in much the 3

same way as they do under the regui.a.

i a

tion belore amendment. For example. If gi from measured ecneentraticas of radio-active matensis in air. and from Etn-O ps erally known work patterns ane stay.

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times in airborne radioactivity areas. It enn be ascertained that no expost' e of an individual in excess of the quarterly 11mit could occur. Indiddual estunates of intake of radioactive material would riot be required. In those c'Jcumstances where the licensee finds it necessar7 to Title 1MarCY maintain individuali:ed records of ir-CHAPTER l-NUC1. EAR REGtJLATOKY take estimates. a requirement to record COMMISSION very small assessments of intake eculd PART 20-STANDARDS FOR PROTECTION result in burdensome and unnecessary AGAINST RACIATION recordkeepir'g. To avoid such a require-Exposure of IndMduals to Concentrations ment the efective resulataan has'been of Radioactive Materials in Air in Re clarified so that assessment of Individual

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intakes less than specified amounta need On Au::ust 21,1974. (39 TR 30164) the not be included in such records ti 20.103 Ate.1e Energy Commission published in ta)(31)- Licensees might, of course, the FeetaAs Rtc:sita proposed amend-maintain notes of mdividual entry into ments to 10 CFR Part 20 concermng con.

trol of internal occupational exposures airborne radioactivity areas through to radioactive materiais including pro- "werk peruut** or simitar mesns, for pur.

virion for use ci resotratory p;ctective poses such as checking effectiveness ef

' equipment. The avallatility of C.:.its of rm pate ppm ett.

a reinted regulatory gt:de en scec:tr.b!e out estimating intakes and mazntainmg pt, grams for respiratory protection and 1491 148

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fgrfest etC157tt. VOI. 41. NO. 330-JAONOsy. NOYtMltt St.1976 2910300839

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--5201

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2titES AND MGULATICtts hdtvidual mtale reconis imless they settre material for 40 hours4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br /> per weet for (2) when it-:s impractieth!e to apply 13 weet.s at uniform concentrations spec-proeecs or.other engineenng ecntrots to

{

were needed.

!$ed in Appendix S. Table L Column 1.

Itmat concentrations of radioacuve ma-t

'8ome comtnenters were concerned that No licensee anall possess _ use. or terial in aar below those defined in (2)

Tegulatcry Oulde 8.15. which is refer. transfer mixtures of U-234. U-235. and procedures, such as increased surve:

i 20.203(d)(1) f U). other prectuuonary enced in the s. mended i 20.103(c3. might U-238 in solutie form in such a manner t>e changed without su"icisnt nouce to a.s to permit any individual in a restncted lance. limitatien of workmg tt:nes or i

% = ** Changes to the g.ude would area toinhale a quantJty of such matenal proyuaon of respiratory protective equis-result in a redatic.g or renumbering of in excess of the intare Unuts spec: Sed in ment, sha.Il be used to r:mintam intake 4he guide with appropr:ste c.%anges to Append!r B. Table I. Column 1 of this of radioacthe material by any individ-4 20.103 tc) includini prior public notice part. II such soluble uranium is of a ferm ual r. thin any period of erven consec.

4mnd procedures therect in the Pt anAz. such that absorption through the skin is utive days as far below that tntate of 2.sc:rrra. In addiuon. a draf t of Re:;;12 hiely. Individual exposures to such ma-radioacuve material which would result tory Outde 8.15 and its associated man-ter:al shall be controlled so *. hat the up. from inAalatics of such matenal for 40 mal were noticed with pubilcation of tne take of such matersal by any organ from hours at the uniform concentracens proposed rule and made available for either inhalation or absorption or both specified in Appendix B. Tatie 1. Col.

somment even be%re ad.ioption of the routes of intaxe

• does not exceed that u=n 1 as is reasonably achievable.

seesent procedures.

which would result from inha!!ng such Whenever the Intake of radioactive =s-WhUe no reference is <nade in the new matenal at the hmits specided tn Ap-tenal try any indjetdual exceeds this 40-male to anowance for parucle size in de, pend a B. Table I. Column 1 and footnote hour control mes.sure. the Ifernsee shan germining expcaures to airborne radio.

Male such evaluatjCas and take such 4 thereto.

1hcilVit7 licensees may continue to apply W For purposes of determining com-actions as are necessary to assure gor an exception for such anowance un. pliance with the requirements of this see-aga:nst recurrence. The licensee saall aler the provtsions of I 20.501.

t!ca the Ilcensee shan use suitable meas-mamtain record.s of such occurrences.

Pursuant to the Atomic Energy Act of ure=ents of conecatrat!cns of ndoac-evaluatsons, and actions taken in a clear 1954. as amended, the Energy Reorgani-tire matenau in air for detecting end and read:!y ident:hable form suitab;e zanon Act of 1974. and secuons 552 and evaluaung airborne radicactivity in re-fer sun :na y review and evaluanen.

553 of the United States Code the fol. stt:cted areas ano m addition. as appro-ge, wnen respaatery protecuve lowing amendment to Title 10. Chapter pnate. shau m measmments of radio-equipment ts used to lunit the innais.

1. Code of Pederal Regulations. Part 20. activity in the body, measurements of tion of airborne radicactive mntena.1 is published as a document subject to radioacttnty excreted frem the body, or pursuant to paragraph tol(2) of this

gegue3, any combination of such mersurements section. the licensee may Isake anow-

1. Section 20.103 is amended to read as may be necessary for t!na.ay detectica ance fcr such me in estimating ca.-

as fonows, and assessment of indivLual intates of sures of indindus.ls to such matenais 1 20.103 Expoenre of individuais to con-radtoact:vity by exposed Ind]viduals. It provided that such equipment is used centrations of radioactive rosterials is assumed that an individual inhales

.a.s stipulated in Regulatory Gefde 8J5, i

la air in re=tricted areas.

yadioactive matertal at the airborne con.

Acceptable Preg ams for Respirat..ry e

centration in which he is pre.t unless p et, uen.o fa)(1) No licensee shall Dnm use. he uses respiratory prote:tive cautpment (d) Notr.tnstanding the proniicns cf or transfer IJeensed material in such a pursuant to paragrapn (c) of this sec.aaragraphs ib) and (c) of th;s sect:cn.

manner as to per=tt any ind:rfdualin a restricted area to inhale a quantity of UCA Me,n assessment of.a parucular the Com*.1.tswn may impose 'further indinduals intake of radioactive ma-g i

radioactive material in any per:cd of terial is necessary. intakes less than those (1) On the extent to whi,h a 11 eta.see

-j one calendar quarter greater thsn the wn:ch would resu.!t from inhalation for may =ake al10mee fer ce of respira-cent!!y wh!ch Teu!d result fmm trihm. 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> in any one cay or for 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> tors in lieu of provision of process. cen-lation for 40 hours4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br /> per week for 13 weeks in any one week at unifonn ccncentra,

m'ent, vent:Ist!cn. or other en :neer.

~ at uniform concentrattons of rad!cactive tions spec 1 Sed in Appendiz B. Tah!e L ing controls,if application cf such con.

-enaterial in air spee!Med in Appendix B.

Colu=n 1 need not be included in such tds is found W be practicsW an.

- Ttble I. Column 1 If the radioactive assessmen*, provided that for any assess.

(2) Aa might be necessary to assure matertal is of such form that intake by ment in excess of these amount.s the en. that the respiratcry protecuve preg-am

. absorption through the skin is likely. in. tire amountis ncluded.

of the licensee is adequate in 1t=:::3g

~ dividual exposures to radioactive mate, (b)(1) The licensee shaII. as a precau-rial shall be controlled so that the up. t!cnary procedun. use process or other exposuns of personnel to sidorne n.

dioactae matenals.

take of radloactive matenal by any or-enc *neering centr 0!s, to the extent prac-4an from either Inhalation or abscretton 1: cable. to lim!t concentrations of rsdio.

tel The licensee shall notify, in writ-

-+r both routes of intake ' in any calen. act:ve materials in air to leveis below ing. the Director of the apprepnate Nu-dar quarter does not enceed that which those wh2ch delim!t an airborne radio-clear Regn!atory Ccmm:ss:en Inspecuan would result from inhaling such radio,' activity arts as dehned in i 20a,3(d) (1) and Enforcement Reg enal OSce Ested In Appendix D atleast 30 days before t :e (1D.

date that resptratcry prctecure equ p-eSince the concentratton spectSed for trit

• tum oxide vapor assumes equal totates by ment is Arst used under the provtsaons skin atscrpuon and tahalauen, the total s Strntaeant intate by facestion or Lafee-of this section.

intane permitted ta twice tatt which would tion ta presumed to occur on2r as a resuit of circu=stan.es suca as ace den:. tnacrer.ence.

'f) A licensee who n.s autho-iced to tration specteed for 112 3 in Appendtr s.

oost procev ure. or similar sp*cial ecucittona. make allowance for use of respiratcry result trem taha! acon alone at the concen-protectlYe eCulpmtnt prd.Or to DeCem.

Table 1. Column t for 40 Dours per weet for Such mta ses must be evahated and ac*

' counted fer by techniques and procedures as gg7 gg, gg-6 shall bring his.rcs,e!"a*

t3[For

• eatradlose*.f re materfaja designated may be af propriate to the circumstances or E

req u emen'g4 of"* pan-EI the occur ence. Erposures so evaluated snat! St.ce

• vita

" Bub

• in the " Isotope" Column of the table.

the concentratton Tslue speciced is based be incluied in determining whether the timitatto a on todtttdual esposures in i 20.-

graph (c) of this section within Cne upon erposure to the matettal as an external radtation sourca. Indiftdual etposures to lo3tal(f t haa been esereded.

year of that date, and is cKempt ITom these materials may be accounted for as part

• Rect : story guidance on assessment of of the limitation on Ind!v*cual dose in individ as! intakes of rsdicaettre matertal 12

'This incorporation by reference prett.

I *o.101. Dese materials sball t'e sun.'eet to Ctven n Reculatort Gusde a 2. " Acceptable sion was acDrove91 Bf the Director of the red.

the precautionary procedures requLred by Conee its. h!odeia. Ecuattons and Assucip.

eral Reetster on Octc*er 19. 1976. 51n::.e tions for a Ricassaf Procesrn." s!rir!* copar, ecptes of ne:uisto*7 Outde s is are sta.:ste 12o.10s t b) (1).

8 atuluple the concentrat!cn values s;ect. of which ar. sea::ade from the Mee of from the C:".re of Standards Des e:omer.t.

Sed in Appendit E. Tame !. colurna 1 b7 Standards DeseNrmet U S Nurear ne:-u.

a3 x loa m1 to ootain tDe quarterly quanut7 lato y co. mss:en. Wasnmcton. D.C. :ssss. C 3. Nuclear neeulatori Commissto.. N.t 2-ington. D C. : Css 5. upon sritten requc.sr

- limia upon wTttten request.

FlottAt t!GISTie. Vot. 41. NO. 23o MONoAY. NOVEMllt 29. 1976

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RULES AND REGULATICNS 52303 the require =ent of paragraph tel of rath a ec;y to the ;propriate Nuc!est exposure as -equired by parac ann aba thj: rec.Sec.

Reeviater/ Commissicn Inspection and of this seetten; IcVe!s cf r:d:stion and Enforcement Rc;;onal C.".cc Juted in concentrations of rod;cact:ye m:ter:2.

Appene:x D of (1> each exposure of an involved; the cause of the ex;:cce,

2. In 120104. parag a;h (c) is revised in excess of the levc!s or concentrations: and correctise indsudual to r.1dt aa to rc:d :s follows:

appheatic Ilmit.s in t* :0101 or 20.104 steps t: ken er planned to L.ssure aca:nst t 20.10 5 Esposure of minors.

(a) er the beense; (:' each ex::csure a recurrence.

of an Individual to rad:cactive material e

+

+

e e

(c) The previsions of !! 00.103tt)(2) in e

• cess of the appacac!c limits in E!!cctive date. These a:nendments te.

and 20.103(c) shall a:Da to exposures ll :0213ta)(1). 20103 a) <2). 20.104 (b) come cMtive cri December M. Im subject to paragra;h ;ts 'of th:.s sect:en or the.-acnse: (37 leve!s of radiaison er exce;t that tne referer.ces in !!:0.103 conrentrata..* of radioactive material Isas 53. 63. 81. Ic3. 104 161 b er.d c.

(b><21 and 20.103'c) to Appenc2x B.

12. a restrictec area in excess of any Pue L-83-ic3. as-4ea.91-55c. es s at nc-Tabic 1. Colu:nn I sha!! te deemed to be other art;12 cab e i. nit in the beente; 44) 933. 93s. 937. 948-449. To 3'at. loc 9. 78 Stat re!crences to Appenc;x 3. Tat;e ;. Co].

any me::ent for wt ;ch not:ficattoa is re. ec2 et sut. 14-2. 88 s at. 4?>

42 t, s c timn 1.

Qu1ree by i:3.403; me

5. ieveis of ra. 2c,2. 2c33. 22 2, 333. zis. 2 ::,; s,c 23i, (3) In 120.405, parar aph (ai is re. diation or concentr at;cns of radioactive Pun. L. s3-438, sa stat. 124: (4: tJs c.

vised to read as fo: lows:

maternal (whether 3r not involving ex. 334:33, cessive exposure o. any individual) in

. E,.,3.10a.

Iteports of oserespo.ures and an unicstricted area in excess of ten Dated at Washington, D.C. this 23rd excessive les cis and concemrations.

t:=es any appheable limit set forth in day of November 1976.

t s pa t r in the Ucense. Each report For the Nuclear Rc:n:atory Commt:-

re ire t> l 0.4 3. e:c. heens e s required under this paragraph shall de* sion.

rnate a re;crt in writ:n sith;n 30 days scribe the extent of exposure of persons SAut t:. J. C2fRF.,

to the Director. 05ce of Incpcct:on and Enfcrcement. U.S. Nuclear Re;u! story to radianen or to radioact2Ve mater:al, Secreter; of the Com.:ssion.

Co::=1ss:en. Washington, D.C. ::555. including estimates of each mdividual's IFR Dac.75-35131 Tilec 11-25-ts.s ts ami 1

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e 1491 150 FEDieAt etCIStre. Vot. 41. No. 230- MONCAr. NCYtMate 19,1976