ML20137W283
| ML20137W283 | |
| Person / Time | |
|---|---|
| Issue date: | 04/14/1997 |
| From: | Cool D NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Lohaus P NRC OFFICE OF STATE PROGRAMS (OSP) |
| Shared Package | |
| ML20137W287 | List: |
| References | |
| NUDOCS 9704180075 | |
| Download: ML20137W283 (2) | |
Text
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/* "%,4 P Ht-UNITED STATES g[)
.-g-NUCLEAR REGULATORY COMMISSION
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WASHINGTON, D.C. 20666-4001
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A pril -14, 1997 MEMORANDUM TO: Paul H. Lohaus, Deputy Director Office of State Programs FROM:
Donald A. Cool, Director Division of Industrial and.
/
Medical Nuclear Safety, NMSS */.
SUBJECT:
SUPPLEMENTAL INFORMATION TO ARIZONA ON THORIA-ALLOY The Division of Industrial and Medical Nuclear Safety concurs on the draft response subject to the modifications identified below.
1.
In the second paragraph, modify the first line to state that scrap processors and dealers
/
can handle and process nickel thoria alloys covered by the 10 CFR 40.13(c)(8) exemption.
2.
In the third paragraph, modify the second sentence to include "or parts" after "...the
/
finished products."
3.
The third paragraph should make it clear that scrap dealers and processors are allowed
. to possess finished products or parts containing thoria alloy as described in 10 CFR
/
j 40.13(c)(4), but they are not allowed to process these finished parts or products. It 7
i should also be made clear that the exemption of 10 CFR 40.13(c)(4) does not apply to scrap metal (by definition not finished products or parts) containing magnesium or tungsten-thorium alloys.
Also, we provide the following suggestions for your consideration.
1.
Change the first word of the third sentence, third paragraph from " Handling" to
/
i
" Processing" because the term handling can be misleading.
2.
In the last paragraph, replace " handle" with " accept" since scrap dealers and processors y
are not even to be in possession of magnesium or tungsten-thorium alloys in scrap metal without a specific license.
Contact:
Mark A. Sitek, NMSS i
(301)415-6155 vete1 k
s.
Aubrey V. Godwin, Director Arizona Radiation Regulatory Agency 4814 South 40th Street Phoenu, Arizona 85040
Dear Mr. Godwin:
This is to supplement information provided to you in our December 17,1996 letter on the handling of finished aircraft engine parts containing nickel-thoria alloy as well as -
questions on smelting of thorium contaminated scrap. Our response to you has resulted in questions relative to nickel-thoria alloys covered by 540.13(c)(8) and other thorium alloys containing tungsten and niagnesium covered under $40.13(c)(4). Further information follows:
Scrap processors can handle nickel-thoria alloys covered by the 10 CFR 40.13(c)(8) exemption which specifies that the thorium is dispersed in the nickel-thoria alloy in the form of finely divided thoria (thorium dioxi6c); Add the thorium content in the nickel thoria alloy does not exceed 4% by weight.
It should be noted that no similar exemption exists for other thorium alloys containing tungsten or magnesium covered under 540.13(c)(4). These alloys may not be chemically, physically or metallurgically treated or processed after the finished products are manufactured. Handling these alloys without a specific license, will place scrap processors in violation of 540.13(c)(4) or the equivalent Agreement State regulation.
We suggest that as specific cases are identified, you advise scrap processors ag.t to handle any thorium alloy scrap unless they know the scrap's content and origin.
Sincerely, Paul H. Lohaus, Deputy Director Office of State Programs Distribution:
DIR RF DCD (SP03)
SDroggitis PDR (YESf)
Arizona file DOCUMENT NAME: G:\\ LAB \\ALLOYSUP. LAB d
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T3 receeve e copy of this specument,inahcese in the boa: 'C*A @pi without attachment / enclosure
'E' = Co W e acppnent/ enclosure
'N' = No copy OFFICE OSP A lC 05@pg lC IMNS:D lC \\/ SQC lC OSP:D lC NAME LBolling:gd /A' 9.
PHLohlk bA DCool FXOamarori RBangart DATE 03tff97
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j NUCLEAR REGULATORY COMMISSION 2
WASHINGTON, D.C. -8 "1
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Aubrey V. Godwin, Director Arizona Radiation Regulatory Agency j
4814 South 40th Street Phoenix, Arizona 85040 i
Dear Mr. Godwin:
This is to supplement information provided to you in our December 17,1996 letter on the handling of finished aircraft engine parts containing nickel-thoria alloy as well as questions on smelting of thorium contaminated scrap. Our response to you has resulted in questions relative to nickel-thoria alloys covered by 540.13(c)(8) and other-thorium Mlcys ceresabg tungsten and magnesium covered under 540.13(c)(4). Further information tboyNwTk-thuY follows:
4 Scrap processors can handle nickel-thoria alloys covered by the 10 CFR 40.13(c)(8)
[
exemption which specifies that the thorium is dispersed in the nickel-thoria alloy in the form of finely divided thoria (thorium dioxide); and the thorium content in the nickel thoria
-O alloy does not exceed 4% b weig t.
it should be noted that rp similar exemption exists for ot....gh]?
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......,, !!cyc.ontcining tungsten or magnesiumAcovered under 640.13(c)(4). These alloys may not be chemically, physically or metallurgically treated or processed after the finished products are manufactured.-87 these alloys without a specific license, will place scrap processors in violation o 640.13(c)(4) or the equivalent Agreement State regulation.
m_.
We sugg t that as specific cases are identified, you advise scrap processors Dg1 to handfeN
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wpm thor m alloy scrap unless they know the scrap's conter;t and origin.
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Sincerely, Jy V
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Paul H. Lohaus, Deputy Director y
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Office of State Program 68 O
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ROUTING AND TRANSNITTAL SLIP DATE: APRIL 2, 1997 PARALLEL CONCURRENCE REQUESTED INITIALS DATE F. CAMERON, 0GC.
4/
/97 D. COOL, NNSS/ INNS 4/
/97 LETTER T0:
AUBREY V. GODWIN, DIRECTOR ARIZONA RADIATION REGULATORY AGENCY FRON:
PAUL H. LOHAUS, DEPUTY DIRECTOR OFFICE OF STATE PROGRANS
SUBJECT:
HANDLING OF FINISHED AIRCRAFT ENGINE PARTS CONTAINING NICKEL-THORIA ALLOY AS WELL AS QUESTIONS ON SNELTING OF THORIUM CONTANINATED SCRAP i
YOUR CONCURRENCE IS REQUESTED BY C.O.B. APRIL 16. 1997.
4 OSP CONTACT:
LLOYD BOLLING (415-2327)
M qe) 0@<gL)0 Y.A j
OGC 001521
a DEC 17 96' Aubrey V. Godwin, Director Arizona Radiation Regulatory Agency 4814 South 40th Street Phoenix, Arizona 85040
Dear Mr. Godwin:
I am responding to your e-mail questions on the handling of finished aircraft engine parts containing nickel-thoria alloy. Your e-mail stated that your investigation of the material indicates that it is exempt pursuant to 10 CFR 40.13 (c)(8). Our response assumes that:
i (1) the thorium is dispersed in the nickel thoria alloy in the form of finely divided thoria (thorium dioxide); and (2) the thorium content in the nickel-thoria alloy does not exceed 4 per cent by weight.
i A review of the original notice (32 FR 15872) published on November 18,1967 and effective on December 18,1967 regarding this exemption, indicates that there are no restrictions on the receipt, possession, use or transfer of this material (see Enclosure 1).
This exemption remains in effect and includes the receipt of aircraft engines by the rework j
company, and transfer to the recycler for molting and/or other modifications. As noted, in i
the document referenced above, en analysis of the potential health hazards showed that it is highly unlikely that the small number of workers carrying out such operations will be d
exposed to radiation in excess of the limits recommended (at that time) by the international Commission on Radiological Protection for individuals in the general public when averaged over a period of 1 year.
d Responses to your specific questions are provided in Enclosure 2.
Sincerely, i
OriginalSigned By:
PAUL H.LOHAUS l
Paul H. Lohaus, Deputy Director Office of State Programs
Enclosures:
1 As stated i
Distribution:
j DIR RF (6S-139)
BMorris, RES j
RBangert DCool, IMNS/NMSS PLohaus FCameron, OGC 4
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HNewsome, OGC SDroggitis Arizona File LBolling DCD (SP03)
PDR YES_X_ NO i
DOCUMENT NAME: G:\\ LAB \\THALLOY.#3
'See previous concurrence.
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NARE LBolling:kk PHLohaus DCool FCameron BMorris RLBah(att" DATE 11/08/96*
11/12/96*
10/17/96*
11/20/96*
11/18/96*
12/. '/ /96 OSP FILE CODE: SP-AG-2
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PAMT 40 o STATEMENT 8 OF CONSIDERATION l
s or uen that evlues ladsestes a need for a snarter shsten sondemd whether 24e enumen.
son,*
en uen.me.,d wtunaute ne.wt m an.sta.mi-ma,nnaa,, oI,,u,ne,nu,m er,cu,i,er,,e,m' hans certed-
,,s n
men.se of m ienal. o m An mie,esi.e.reen..e,e immed i.
,tm,e,unuan so w,,o,ened e en,,
Nt of dieof nuelear noeure, w a rueuen summit unuen esam.ni. and susses.
Commmmon etu arranse pM, t.,.,
arded nione). thens sans tone for eenaidmuon in nenneeuen is with the proceeed amendiment withia 80 telng ineerporated as scrap in to asBL-samDW reas'ter sometruouen mam dets after publication of the neues of
&ns of alloys sontaining nietel.1f signifl*
for thortum and emer sentamme M propmed rule making in the Feessat sent thonum impurttans were to to pres.
the perkdie campuns shows an merw.
s Reetetts After cerelderation of the ont in materials used in sonstruoung has thenusa tevW in euah mam me esmments received and other fasters in*
nuelear remeter plants, such impunu".
regulataos set forth below amar he ennend.
volved, t.he Canaanneelen has adopted the eculd result in semitional redatteute $6 ed from 51ste to tirng to eteet hagasing propeeed as endment. The test of the seen products in the reactor ecolant and sentrols to prevW the monum p amendment art forth below is identleal potenpany in the atsaasphere surround
- tained tri discarded alekel.lberta strereft with the test of the proposed assend.
ing the remotor plant arid in discharged enstne parts from contaminsung mau.
ment pubhehed on December 33, lH6 pastee Asnens the informaleen senald*
nale used for othuen of mieu Since the amendament le interided to prod was the esperimental evidence pro.
enantera provide rebet troet, rather than to 1s.
vnded by the pettuonef en the removat of The Commiasten w1B aise assir if peas, restrictions under reguleuene out.
therna in alas durtne metal processins' determined n
, speasseauen lim.
i nr.tly in eteet it wu! beesme efecuve The pouuener has reported the resulu its en the ame therlum and other without the custeenary St. day notics.
of a laboratory esponment that followed abodist malenals answed as treen son.
Aseerdingly, pursuant le the Aleado esmanorslal melt praeuens for scrap and taminante in materials used for een.
Enerer Act of 1964, as amended, and Suains egent addauene. These results strucuon of nudent remeters. These um.
the Administrouvo Preesdute Act of have aboon that essential!r a!! of the fu would dlSer for dahre som.
1948, as namended. the fellowins amend.
therla introduced into stainless steel and nante and for verytna reneser uses ment of 10 CFR Part 40 la puh11ahad as Ineems! maltans furr,ases is esparated a document subject to sedadention to be with the aled.The peut 6snet also has to.
The afnendment publiehod tale, ggf.
e9ecuve upon pubtlestion in the Psossat poned the neults of a fun saans melt of Ms he the prwassed rule published 1
Mastelley &Doy X to whlen a large quan.
nn the ProsaAL Rastersa (Se FA 8048) hasseres Utr e$ ideRel. theria scrap was added in the fellowtag reapegge:
These neults also have shown that amore
! The esemptlen has been restricted a
than te sortent of the thorts was re.
to thenum conta;tted in mar Anished air.
anoted in the slag and the thertset son.
eraft engine sert sentairdng nlcgal-tent in the Antshed 9tartelley eDef X thoria alley: heeaded, afhsbt: (4) '!he i
j was enhetantaaliF below the lleMie of Morluan is dispersed in the niekal.thons eensern with respect to resetor son.
aller n the foran of Snely ejvided thorta 32 M 18872 (thorium dionade)1 and (b) the thorturn
- m2IIy6 etnset&on snatsnal, contamination.
a, on me.asie e pur,enu, evana.ie so= m the,ashei. ena ano, doe.
data, the Camustnion has sonaluded that not enesed 4 meteent by weight.
4tfact.,e 1 GeomPtien el Cortein Alesreft $ngine the thorta (thenuse dAcalde) sovered by L h mapn is in me form of a new I 40.la top tes rather than sa tage -puon would normally to 7e.
Porte Centelning Niebel.Thorio Alley saoved with alag an melung steel and evnendment of 8 4013(cH4) as proposed.
On August 1.1043, the # teaue B)ergy ruskel beso allere Therefore, the Com.
We chance to heans made at this time in 1
Coanaruasen pubhahed in the PaeonaL maaslen ennaldere it enlikely that Garry.
the etemption #0F thertugR An tunesten.
Rasserse 136 FJt. 0043) a proposed ever of thorium dunas melting of msg thorturn and snarnesium.tbortuan aborn amendment of 9 4013 ten te). 10 CPf6 sorsp, generated in the use of guetri, pretent?F provided in i 6013tc)(e).
Part 60, which woule hete onesagted thorta eDets in jet aircraft engine paris,
- 3. The esessption adopted permlta the Anashed products 4 parti fahrtestes of, wlil comaminate nuolear reactor enO.
enduct of metartues such as repair of or containing ret thorthin Retal auer struetten materiale to a level stuch htshed aircraft enstne paru eentair;ng i
in which the %ortuss Goned % the &Doy would ineresse reactor plant radio.
nickel.thoria alley, and thG ?.Gng and ela processing of nickel.thoria actap by scrap settvitF le'n re!! ts noted. however, that does not etcsed 4 percent by weleht '!he the data e moval of tborium in the dealers and preesmors An analtals of the nottee of prisposed rule maging was puts lashed in ree;onas to a pouuon Blod bF metal processinf are directit applicable potential health haaards shows that 18 la E I du Pont de Meeneurs and Co. Inc.,
enir to thorium diapereed in rustel. higrJy unuke!F that the em&D nuamber of wilminglen. Del., roguesung an esemp.
thoria muets tn the form of Snely dividag workers earrylag out such operations in.
tien from llee'teins requirementa for thorts (thorium d6caMe) and the eseenp.
volving nickel thoria aHore w1U be es.
rachel.a.hortues muere eenlaaning up to con has been umiled seenrdine:f, posed to redtouen or airborne concentra.
4 percent therlusa by esteht. Interessed tien8 of radioactive insterna! &n escene of j
paraens were latiled to submit writtan aimsts recomszensed er the internauonal l
eoenmente er suggestions for seneiders.
Comenlaston en Radiological Protocuan for individuela in the seueral puMic j
uon in sonheeuen wit the when averased ever a perted of I pear, amendment within 30 dare after uen of the neues of proposed rule making In the Fassaat Rasseen.
pubesquent nrr ptshusauen of tt.s pro.
poemd enemapuess ter esmaant, the Com.
l
' mates to wann see Osmansamen ans wane.
- ' e*lM.'s.o".l.',
-ar ~
,o - o..eesw e;. L, mea,* 3,,,,,,
act er sees as an.ed.e i
i ENCLOSUV 1
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PART 40 o STATEMENTS OF CONSIDERATION
,e e
- 4. Present subporegraph 183 of i M.13 se seemse ser *e esport of e-h 3* F a '*8 4
esamlerwelshle.
P M 'sh88 12/11/88 803 hee been redesignated subpor86FaDr.
a3W sebEhdhents would:
OffeflIVe lIIIllOO eei.
- a. Revise 160 391eIi4I till to abeh.
- 6. Present paragraph id) of l 40.34 has tute, for $e werde " Caution-Reele-Mierrlieseous d meadmeau been redesignated persersah set and a estive Material-Drentusa" to me enton-1 new persaraph tal has Doen added te hg legend rettdred te De impresses em goe Pen 30 Steimeau of Cmwon.
g toJ3 le provide a ponere]16eenet for the sash seampt asunterweight eenlaaning esport to seuntries er essunstlene other tapaniuso, tbs words "DrplMed 988=W3 thate mete listed in 3 40.00. Southern
- 86. Delete the sole 64a0 PMeleD 18B 36 FR 8313 i
Rhodesta ans cute. of thersum son.
140.34te)(Siilist umat the seunterweteht P Heese/t800 tanned in Salahee alteraft engine perte pleelme or other omrtng snuel Det h N gevocswe 6/18/70 containing niete).therte aDoy, previded mered er gehetftt*8; thet: va) '2%e therium is dieseroes in the
- e. Add a new 14018881'03 (188' to M*
On December 10 1000 assunehed In the M,the Cesamlesten 4
nnehol-theria alley in the form of Anely gestse cash peampt eeunterweight le he Roomfoe ese F,A,gggg,11.Usemens of Seurte 38488.
giv6ded thofie (therium dioaldel; And lehened er marbed du.4bir and lestbir 3063 preposed amendmente te lie it) the therium aer. tent in the nietal.
with the leastasention of the manufac.
i therla t.36ey does pet seesed 4 cortent taper, ahd the eastoment: intumorte le CFR Part ef, to soempt from by wonent.
Altertuene PNidbited'i regulpemente steeselectric m fo,, se agg als esp sostatrdng het men thes 3 per.
.. emmies,regoins,,,re.vnelone ton,eet furth,0me, er 8.t..a new 3 oc.lsten s4Hte esas by welsht seuses esoterla!.
o
, or.oon e
-i---- =a 1
en teMO shall aH h deemes ir,terest.d - -ied =
t po, sed asnandm,d.t. Inc,lusins edalu,onal 8."I.W#I ',es'"st."eu- = -a"n in o,s.uer, ar eta eee~ed ane he me a- ===*e -
upplett
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no Commenaien has found that the re*
lataas erbs
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solpt possesalon, use, tronefer, and lan.
- 4. Rooke i gJsre) w resent the new p*t into the United stanse of therium legend requiteesente in i ef.19(cl161 m sommWudehr twteined Ari any Anlehet ai
& enelne g3; gas,,,geg payeems were smeltet to heure Wed, the Commisson has w
and pus.
me pmped wendmk N part senta1 runs niste) thoria a 0r. pur.
,su,bedt, y,r,ittee samuneste
,g
,,nonge,osacr> in eenneetten het W me amendmenu een est be4e le euant to the esemption in i 40.18tel(41 pubushed belet involve ualmportant one me propened amendenerrt within tosppen) wRh the test J the proposed evenuties of source meterial within the thirty 100) enra after pubilaation of the W Muskd C' 97 H'
g i
3,N, Osmause60M has found h re.
eseanins of soeuen e3 et the Atosuc menee to the peestat Reerefra. No mierry Act of 1984. as amended which samuneau surgeottas chamass were M*
est,e,t. po,ss,ee,sson, use,, t,ra,,n,sfe,r, and a.
are not of e6sn18cance to the soeunon eekes 'IDe test of tae amendmenu set 3,,
g,gg,g,
, 3 3s eetenes and arcurity, and that such ac-out below le lesnue61 with the test of me geopered amendmente publishcd g
,,,,g,,,,,,g pg,,,,,,,,g,,
,tiettles een be s,0 is ufe e,ith,out un. Ju,,ly le. lps es.eneve hee. onducted w 3
t br weesht seures material an.
g",, = na gn,gl:,fy,=
The Ceeupleston hae 61e0 found that the
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, mend,,e,,te e,
44..i.
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esport of therium in Ardahed streraft ohminau me provulen in me seesnpuen fug,rasu,um na,sounterwelehu that the 83 of the Alemut EnerWF Act of 1964. se eastne perte. Pursuant to the genef 61 lia u
p3 g, ogg an,ering not be reanoved e ce m W Wedcanu sense in i et alidi pubtlahed belos. will er penetrated add. although prehlbitin the commen defense and esturity. &nd not be truautal to the interests of the United States tM shousal, physical, er saetalluPW1C[
het such acuvides een be sonducted treatment er prosessing of esempt
,ithout any unreasonable hasard to life w
no Complealen tonalders that f,n.
,,,,,g, khed 61rtftft engtne parts 00ntaintnt onutterweights, perett the repaJr of nickel.thorW anoy are not producta in*
restoration of aAF p!6Mng of other oo'*
Doder the proelstons of I164.16(6)(01 ef 10 CF91 Port 160, "mesepuord and tended it "et by the general pubi;c ernha of sountervetehte The present Continued Metulatory AuthoritF in limitatien in the esempuen W seuttles.
within tM n tiew of i160 lita148) of le CPR v e 60. Esemptions and Con-wetehteepn whaeh the plating er mov.
Agreement Setse Under Seeuan 314,*'
Linued 7efulatory Authority in A5fe'-
ertne has not been remo*ed or pene-the transfer of pasaseelen er teatrol by ment States Under Seepon 314". ACCorda troled le no langer benemery. Noet (8) the meetufactunt, proseanor. or producer espertense to date with thousande of of pienelerMe sortaue dletelbuted for tasty, me transfer of passeselon or counterwachte la tese over me past use unde" the essenpuer. would be sub.
sentrol et such Afuehed siftytfl entino perte in aeropeent States ' by the manua esters! pobre helebtee tikbt presset maa*
Mt u me Compuselem's licensing and facturer, preeeeeer, of 9feducet would ufseturies toebalques preende adottante twoulatory toquirements soon tf the prod-not be tesulated by the Cognataslon.
pretsonen against studstles af areduue4 yet is enanuftetured pursuant to an and 43) esettues etueh would inettve Agresenent Step bconse. Sy the terms Ptsreuar61 to the AMmic Energy Act of IM4. as & mended,*and the Atuntnistra*
processins of urnalem are esproselF pro-of the esempuen, me Cosamlesson would 3
Uve Procedure Act of 1948, as amended Albined, essept for presseees wfueh 40 esorties such regulatory authoritF by the following amendenente of 10 CTR het involve espesure hastres alsnLA*
esempung, teder new i de littH3 t tub Part 40 are subtlahed as a soeument sub.
sentJy daearent from these levolved la any pertes (leeluding a manufacturer, 3ect to sedloostion, to be eSecure thirt) handitna an tandamated asunterwelsht.
processor, or produeer la an Agreement (809 d6Fe 6fter publiceuen in the Ps9-The Coenardesion eeneidere th61 the pre" State of pesecolectric eeramuel to the seat Resorten vialons In the sehendsnente adequatelF setent est auth person transfers ple-sentrol the low redesuca eseesures mat seclettric estemle contaltund Det more may result from dansarded counnet*
them 3 pertett by weight seuros snelertal
> p m 14007 wetehts Ptarsuant to the Atomus Storty Act of IDH, es amended, and escuene 803 mind Since the fouewitne amendmente 4
Publishee GN60 reDeve frem. rather than impose les of Une 6 ef the United States Code.
Ef fectme 8?f,/98 me fellewtas amendmenu'te Tfue 10.
restrtettene landef tesialetnens eur.
Wealem C**M;**4 g*
f*ntly 185 seest, they wiu besogne eHet.
Chapter I, Code of Pecoral Regulauens, Counterwelglue tive wtthout me sustomary 90.dat notsee-Part to are publaghed as a document eub.
Aseerdantly, pursuant to the Atomic 3 sot to eediatsuon erecuve thirty 450)
On July i gg,g gn g,t.1988, the Comm,issise pub.
Energy Act et 1964 es sonended, and
$mp g,,o,,,after putWetuen in the Pesssat y w g,,,,,,se p.g, assuena Mt and MS of stue a of the 13301) propened amendmeate to lle res.
Unhed males Code. Une feucetas unmues "Mesmates of Seuree Maternal",'eenendmeate to Title it. Chapter L 38 CPR Phrt et, portanaams is the esernp Code of Federal Regulealene. Part et 36 5ft 13196 ten from Moonstas sieutrements og tre pubhehod as a destuneet subjoet to Puonehoe 7/3000 armadusn eastmoos in sounterwachu eedineauen eSecuve usen ptabucauon in lastaDod in efter6ft, retkels. projoeules, me meau Messent Etteetwe l'3900 add 30mDee, or eiered or handifd in ammaa*use with lastausuen er removal et eueh eeustervelghts. and the pen.
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Rannonse To Questions On Nickel-Thoria A11ov 1.
Can the aircraft reworking company remove the parts from an aircraft engine and then sell it to a recycler?
Answer - Yes, this activity is authorized under the current regulation, i
10CFRPart40,Section40.13(c)(8).
]
2.
Can the recycler melt or otherwise modify the engine part?
Answer - Yes, this activity is also authorized under the current regulation, 10 CFR Part 40, Section 40.13(c)(8).
3.
Has an assessment been made of the public exposure if these parts are melted and their products enter the public steel supply?
1 Answer - We are not aware of any studies which specifically address public exposure to nickel-thoria alloy which has been melted and incorporated into products entering the public steel supply.
4.
li an enforcement action should be taken, should it be against the aircraft reworker, the scrap yard, or who ever melts the parts? Should we establish a program to detect any possible diversion to melting companies?
4 Answer - Given the information you have provided, we are not aware of any basis for enforcement action. There are no requirements which dictate that you establish a program to detect the transfer of material containing nickel-thoria alloy to metal melting companies.
l h
ENCLOSURE 2
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