ML20137V078

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Forwards Documentation Useful in Determining Whether Buried Asphalt May Be Released to Unrestricted Use &/Or in Establishing Guidelines Re Disposal as Part of Current Plan to Obtain Release of Area to Unrestricted Use
ML20137V078
Person / Time
Site: 07000734
Issue date: 11/12/1985
From: Asmussen K
GENERAL ATOMICS (FORMERLY GA TECHNOLOGIES, INC./GENER
To: Crow W, Shum E
NRC, NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
References
26041, NUDOCS 8512090463
Download: ML20137V078 (15)
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Text

{{#Wiki_filter:. 76-75 nrma.ro 396-ss eeth g~- In Reply GA Technologies Inc. Po. BOX 85608 SAN DIEGo. CAUFoRNIA 92138 12 November 1985 (619) 455-3000 /* RECENG Mr. William T. Crow 2 80ViB%y ~.9 Office of Nuclear Material E-gguc6%g, j Safety & Safeguards U.S. Nuclear Regulatory Commission Washington, D.C. 20555 g hs g ps#" j ,r, s Attention: Dr. E. Shum. 4M

Subject:

Docket 70-734: SNM-696; Burial of Slightly Contaminated Asphalt in 1974. I J

References:

1. Amendment #60 to State of California Radioactive Material License #0145-59, November 22, 1974. ,j, SV 2. Frank O. Bold letter to Dr. Simon Kinsman, October 23, s 1974. 3 Earl Ivan White letter to Mr. F. O. Bold, April 26, I 1964 US" 80V i 5 @ 6

  • 4.

William R. Mowry letter to Dr. Gerard Wong, May 15, 1984 i b (CAL-6005). -3 5. William R. Mowry letter to Mr. Ben R. Kapel, June 29, l g "jp 1984 (CAL-6030). l "hcM 6. Amendment #76 to St, ate of California License #0145-80, y July 18, 1984. g 7. Keith Asmussen, GA letter #696-8023, to Mr. William T. Crow, Docket 70-734, dated October 1,1985. l

Dear Mr. Crow:

l 1 In 1974, GA Technologies Inc. (GA) was authorized by the State of Cali-fornia to bury on its premises approximately 300 tons of asphalt slightly contaminated with uranium and thorium (Ref. 1). On the basis of informa-tion contained in references 2, 3, 4 and 5, the State subsequently amend-ed GA's License #0145-80 removing any restrictions on the use of the area where this material was buried (Ref. 6). This was discussed with Messrs. nsM Buddy Brock and Robert Thomas of Region V during their visit to GA on September 24, 1985. At their request, copies of references 1 through 6 g were provided for their information. (D O gg On November 7,1985, I discussed the current status of the buried asphalt ,8 with Dr. Shum. Dr. Shum stated that he was expecting a phone call from 00 ' an official of the State of California regarding this subject. To assist Dr. Shum in his preparations for discussing this material with officials ,E of the State of California, enclosed are copies of references 1 through in 6. This information should also be useful in determining whether the buried asphalt may be released to unrestricted use and/or in establishing + f guidelines regarding its disposal as part of our current plan to,obti5iri L'/ g release of the area to unrestricted use (Ref. 7). y t{j*M3 10955 JonN JAY HoPKINS DR.. SAN DIEGo, CAUFoRNIA 92121 ^

William T. Crow 696-8036 If you have any questions, please contact me at (619) 455-2823 or Mr. Frank Bold at-(619) 455-2020. Very truly yours, Keith E. Asmussen Licensing Administrator KEA:he

Enclosures:

References 1 through 6. J

STATE OF CALIFORNIA 4 DEPARTMENT OF HEALTH 1 1-m. f 014c co RADIOACTIVE MATERIAL LICENSg u. u. Supplementcry sheet uw General Atc=ic Cc=pany ?. O.' 3cx 608 San Diego, CA 991'9 Attention: Dot:glas T. Farney Licensing Ad

  • istrator License No. 01h5-59 is hereby a= ended in part as' follows:

To add: 14(al) Letter dated October 23,197h signed by Frank O. 3cid, and attar '- -sts thereto. - 30. The licensee is authorized to bury approxi=ately 300 tons of aspi ='t containing approx 4-=tely 500 =icrecuries of ura iu=,16C0 =ierecuries of therium, and dau6hter products of the uraniu= and therius, on the licensee's property as described by the letter dated Oc:cher 23, 1974 signed by Frank 0. Sold, and attac'sents thereto. The asphalt ecut=-d"=tei vith radicactite aterial shall be covered by set less than ten feet.of earth. The licendee shall -=' stain at the huriaL site a pre

  • e:: =a-her conta*~'~c a durahLe, cliarly f_sible inscriptics stating the '<'-As, a unts, a::d' locatics of radioactive =aterial buried at the site.

i e l e i - For the State Department of Health November 22, 1974' /- Dose by--- / 2A, Simon Kinsman, Ph.D., Chief ,.a :. > -:. u....

(Eij/[ ~~'~ t ......._as w.- -EWAAL A~.omN oENERAL AToulC COMPANY P.o. Box 31604 SAN ofEGo. ALIFoPNIA 52134 (714) 453.*C00 .Oc:ober 23, 1974 Dr. Si=ca Kinsman Radiologie Heal:h Section California Depar::en: of Heal:h 744 "?" Scree: - Sacranenco, CA 95814

Dear T;r. TJ:

scan: General A,:o ic Company has a need to dispose of approx 1=ac l (2.7 10 grams) of broken asphal: e y 300 :ons ,to an average level of 1.8 x 10-0 contacinated vi:h U-234 and U-235 uCi/grac. This is a recuest for permission to bury the asphal: panye on proper y owned by General A:omic Com-J.::achmen: the sa=ple analysis, and our analysis of the resul:A describ , :he results of C show the location and cross section of the proposed b A::ach=en:s 3 and s. There is no natural vater in the burial area so that 11: urial site. ing vill occur. per anent enviroc=' ental r.oni:oring scacicus near the b ur you.

he can-If you desire addi:1onal infor=a: ion,.please do not hesi:a:

me. e to con:ae Very trvJ.y yours hn.. O Q. bM Frank O. Sold, v.anager t Heal:h Physics Department 1 ?03/sr A::achmen:s W. 4 e f 6 O e .n

a i, 0' ~ t.. I,. -i. .,i*..l! j . i:*. A'""AC9"NT A: 1 ...,'v.,...-.. ..... w..... ..,..i... c -.. s.. .v ....;y -s. .,' n,.. t.. o . c:. :.. :..-. .:r s i 1 ..i. 1 On September 20, 1974, 24 asphalt co-ing sacoles and a bla=k a~sphal: sample vere sen: to Con: ols for Invironmen:al "a't"-don for iso:opic uranium, i . isotopic thorium, and radiu: analyses. Iach coring sample consisted of three I ;S,. - corings of asphal: per see:or of the asphalt.lo:. The lo: vas divided in:o

  • 24 ecual sectors for sa=pling.

~he es -* -* - ' a=o un : of asphal: in.:he en: ire. i., lo: is 300 :ons. The results of the isocopic uraniu= analyses are as.follows: ^ .I,* e.L, f, -Samole U-234 U-235 U-238 et .. i,. .... 3.1 .04 I' ..38 .02.: '!.. 08 :.02 1 2 7',.,.:.'3.34 t.02 .. 00 t.01 :: ..06 2.01 ~ y '..p'...3, o.- .,

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  • 0

3 4 y.:?. >:t. 1.1 :. 02 .04 :.01 .8_t. 04 i.01 v,.--.0'.< ..n 5 ..h:. .70 =.03 '..00 ' 01. ' - . 03 2.0L m. 6

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.23 2.02 .02 :.01 8 .43 :. 02.. ..,l. 00 :.01 . 03 :. 01.. '.;.. s. 9 1 .09 t.01 . 00 =. 01 . 02 2.01

  • 10_,. ' [,I', ),54 =. 02 ".[ . 00

.01',,.'..; . 04 :. 01,. . 0 2 ~ 4,,... ': 11 ' :,: D '. 04 :. 01. c.. .00 :.01,...' J. 03 ~ ,. 12 [?$'d.('.05 . 01.. * :~ S.00 =.01 P--I.'. 03 t.01 '. ~- C.. V...'.e

2. 42 ::..'. 04 ['i [.. 07 :. 02-

~ ~, 13 ?'. '. 00 :. '. 01 /- 1 .... 14 >.v.2.62 I.04 '.:. 03 :.01. 4: -.00 . ~ - . 0L. 9 ;.

15.. ?,'- 7... 03 t,. Ol '... 00?
. 01.-

'../.:. 00 t. 01.' 1,. 0 0 t. 01. , 16 .J.'..... 10 t. 01..,."., .00 01 .. ( ~.. 17. ~ 3, cc.E.i.40 t.01 " "-.00 :. 01 J'. b.03 :'.01

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t... t...06 =.02

.:.. 00 : .0' ~ . 04 ':.02 "p 19 F. ', ' .00 :.01 ...00 t.01 .03 t'.01 '.e'. ". 20 J.., 5.13 :. 05

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.11 t. 02.... - .07 :.02 ^ 21 \\> .00 :. 01.. .00 :. 01.,, .03 :.01 ," 4, ', , 22 1.76 .03 . 32, .02 ;,' .05 . 01 ' 23 .00 .01 ;. .00 :. 01 .00 =.01 24 * ,, e '.~.34 tq.03 . 02 :.01, -f.02 t'.01.i ~ Average.[ 1.74 pC1/g

-.071 pC1/g
  • ].033 pCi/g'...

d ...L 2 'l,. ~ n . ! s.. *..

  • Total /

'. *.4.,3 ,,1 C, f 3a pC,, 8...' 0 pC., 300 tons i l ' The above results have been compu:e'd vith background subtracted.. Looking ac 4:i-the ratios of U-234:U-235:U-238, 1: can.be shown : hat the uranium precen in the asphalt is enriched, and therefore represents contaminacion. The total uranium contamination is about 500 microcuries.. l

r- =; ..' s., i i

  • he results of the inocooic thoritna analyses are as follovs:

.,..r.,.... . samola i / Th-232 Th-223 Th-230 1 .30 i.12 .78 i.13 <.2 f. o. ..oo .oo. -.58 .20 to- ..-,-.05 5.co 4 ,e .e.e a.a-.3 3 o o .30 4 1.68 .20 2.77 =.30 <.2 5' . '. 1.08 i.12 1.57 : 13 ' <.2 j 3.06 : :.13 4.32 : 10 69 :.10 + 6 t- ,.:l'l' ',7 4.02 :.n 4.39 : 13 . 89 :.10 4 [ i 8 5.63 .12 5.75 2. 14 . 69 :.06

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9' . 95 :.08 1.75 ^ 20 46 06 1 0 1-. 7 / '. "- -.7/ * .t'- t -- -. O o' H . l.30 :.10' 2.51 : 13 4 '.73 :.13 4

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-.36 . /.. 06,' i

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,s 4.. 2.04 :.10 2.72 : 11 ',2 4* e s 14 *... 3.25 .12 3.98 : 30 .1.26':.13 15

  • 7.25 o.35

,, 5.39 .13 .99 .10 l'. 16,- -- ~,67 :.10 2.45 .11 O.91 :.10 1 !.l-7 ,-.09 s- ,09 -.7, _.,, <n 18

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,10 - 1.95 i.11 ' "T .31:.06 .' 19 1.93 i.12 3.45 c.30 '.3 4.71 06 ,l. 20 - i . 1.94 *.11 < 2

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21

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2.96 .13 5.24 :.15. .15 :.08 ( j 22 1.53 :.12 2.02 2.13 <2 ,23 ',_4.81 2,14 3.41 :.30 .18 .10 ^ 1 24 1.98 t.20 2.74 :.06 l1.95 :.03 / l Avesge: ,.2.36 pCi/g - 2.84 pCi/g*.,,. ' ' O.55 pCi/g. 'i, ~aest( 642 pCi 772 pCi 150 WCi - '..- v 300 tons "'ha -:o:a1 thorie= presen: in th.e 24 sectors-is abou: 1600 microcuries. I vould be nes:1y i=possible :s de:e--% exae:17 hov =uch of the :horius I is background and hov =uch is contamina:icn. "'he blank sample' gave a h-223/ Th-232 ratio of 1.5. In theory, na:urally ec:urring chorium would have been in conple:e equilibrium, i.e., the Th-223/Th-232 :s:1o would be 1. It should never be 3: eater than 1.. The sampic ra-iss vary from 0.7 to 1.3. In Sorrento L Valley processing, the equilibrium be:veen Th-232 and Th-228 (which takes i about 60 years to es:ablish) is disturbed when Ra-228 is driven off in the spherodization step. Th-228, when broken from the chain, decays w1:h a 4 1.9-year half-life. Th-232 regenerates Th-223, but at a much slower rate (6.7 year half-life). The asphalt s:orage lot is about 10 years old, so if Th-232 vere deposi:ed in :he lot 10 yez s ago, only abou: 50% of Th-223 vould have been regenera:ed a: this :i=e. Unfor:una:ely, :horium could have been deposited a: any :i=e during tha: period, so that the state of ecuil-Ibrium is co=ple:ely unknown. In any case, Th-232 vould be greater than i j .~,. ? -..g >u ,ev ,.c,,, --.,,,w..-- ss.- ...-.e.,,m ..,,e-. -e -.v,,

~ a . Q3... $r,..j

p. 3 j-Th-223; which is not what we find, even in the blank. We can only assume

!j that, since mos: of the samples have abou: the se=e ratio as the blank, that J. the majori:y of the thorium ac:1vity is na:urally occurring. Why Th-228 should be presen: in larger acioun:s than Th-232 is unexpl.ained, bu: =sy be a charac: eristic of :he analysis. Fc: those cases (se:: rs if and 23) ^ where the Th-232 is grescer :han Th-22S, :he possibili:y of con:a:ina:ica l. exis:s. t i.. l The f=11oving a=oun:s of P.a-226 vere repor:ed to be in the corings ' l' by the laboratory perfo:=ing :he analyses: U ~ Sa:: ale ..t P2-226 (oCi/e) I ~, 1 30 h 2 50 3 26 p' I 4 37 l; 5 ,e.. 6 ~ 14 l.. .,7 7 r. 8 63 s-j y*g 11 10 7 '. ~. ~5 1 ~, n. e e ,a ] 13 .8 .4 .i.0 .6 s 15 . 16 16 ." 14 ~ . ' J. ' 17 10. '. a .- S

19..

/- ,,, 15... 20 - i 42 ~ 21 .,),.'.

  • 34 22 20.

23,. s. 21 24 .1 2.. Blank 6 The above results do not heve the blank eubtrae:ed. The average vi:h the blank subtrac:ed is 15 pCi/g. since Ra-226 can only come from the U-238 decay cahin, and since the proportion was far eco large :s have c =e fic= the repor:ed U-228, we questioned Cent: ls for Inv'----- :a1 ?:llution abou: the analy-1:al =e:hed chosen c do ?.a-226. ~ hey had d:ne an ins::::en:al ga::a-scan using a Ge *d de:ee:s, and.had ac properly : rre::ed for ge ce: y fae:::s during e=unting, giving resul:s abou: 100 :i=es :co high (:he above resul:2). Subsequen: radioche=ical sppara:Lon of Ra-226 froc selec:ad sa=ples (tar por:icn only) gave resul:s of less chan 0.5 pCi/g. This could mean that :he Ra-226 was really in :he rock frac: ion. 2he re=aining rock portion was gs==a-scanned'

0s.. P. 4 . g.) ' in the same fashion as the original sa=ples, and though the resui:s are still very high, :he analysis was perfor=ed in :he sane =anner and :he i results can be c = pared. ~he rocks were found :s ecc: sin nearly all :he ga ons.o se"-, 6 j. L t. .r .F i i .I. i 1 i s s n 8 g a e ,.g 8 g C

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Earl Ivan White Environmental Consultant 785 S.E. Vis:a Gresham, OR 97030 503-666-3687 April 26, 1984 Er. F.O. Sold Manager, Compliance Control GA Technology Inc. P.O. Box S5608 San Diego, CA 92138

Dear Mr. Sold,

I have exacised :he si::a: ion vi:h regard the asphal: from the storage yard, which was buried in 1974, and have reached the following conclusions:

1. The asphalt core samples indica:e that the uraniu: present is enriched, however, the average concentration of uranium in the 300 tons is approximately 1.8 pCi/g.

While the natural thorium and uranium soil concentration can vary widely around the San Diego si:e, it appears to be around 3 pCi/g for the burial area.

2. The conclusion from the asphal samples as regards thorium and radium, was that : hey were probably naturally occurring, and I concur with that.
3. Even if the uranium levels were above nor=al values, there is is no per=anen: va:er flow on the site and any runoff goes into the flood control channel.

There is also no use of the runoff water as it flows-to the ocean. The burial site is about 75 feet above the brackish ground water under the area. Sased on the above conclusions, I cannot see how the asphal: could represen any threat to anyone, especially when compared to the nor=al conditions with respec: to soil radioactivity. I To keep the site from being persanently classified as a hazardous vaste si:e by the E?A, I would recommend that you reques: the asphal: burial be reclassified by the state. Yours truly, t .L. W 4 Earl Ivan White n--

?S. W W Y .t?.T: "S pr c.

  • 1

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  • 3 fat Tecnnog:es - -

= _x_ _c_-._- -_._,m ,7 GA Technologies Inc. In Reply PC. Jox W f54c f Refer Ic: CA*.-6005 SAN CIEGo. CAufcA.=:A 32*:3

stenss acco 15 May 198a Dr. Gerard Wcng State of California Department of Health Services Radiologic Health 7 Licensing 744 P Street Sacramento, CA 95814

Subject:

Remeval of Certain Radioactive Waste Burial Require =ents.

Reference:

(a) GA letter dated 10/23/7t. (b) R/A Mtl. License #0145-59 Amendment 60 dtd 11/22/74.

Dear Dr. Wong:

GA Technologies Inc. (for:erly General ' Ate =ic) requested, ref.(a), authority to dispose on its pre:ises approxi=ately 300 tens of asphalt slightly ec::- taminated with uranium and thoriu=. Approval to de so was given by a:end-ment to our license, ref. (b). GA has cceplied with the conditions imposed by the acendeent since the c.c'.erial was disposed of. We now have need to do additional g ading, backfilling, and soil compact:i:5 in the area tc acce=codate new facility construction. This may invclve ren-ovating and recompacting the area where the previous wasce and rebble was disposed of. It =ay be necessary to re=cve certain materials which are not suitable for reecmpacting. Sinc.e th_e levels of contamination for =aterials initially buried are se low a (1.3x10 uCi/g= average) we request that the materials be released frc= radioactive caterial centrol and the area no lenger be retained as a =arked hazardous disposal site because any =cve=ent of the material will only re-sult in dilution toward values found in general environs of southern' Cali-fornia. Further, any compacting and area renovations will provide added stabilization of the soil around the =aterial, thus ensuring against egress of saterial via ground water or release of radiation to the surface in a sanner potentially expcsing inditiduals. We believe this request is ecesistent with current NRC and I?A require =ents to protect the public health frc= the subject radioactive =aterial.

y ) ) Gerard Wong,.AL_o005 w It is noteworthy that the =aterial contamination li=its are (1) the same order of eagnitude for caterials which =ay be released via water to unre stricted areas under 10 CFR 20 Appendi A; (2) Five orders of sagnitude be-low the 100 AC1/g= expressed in Table 1 of 10 CTR c1.55; (3) orders of =ag-nitude below concentration of the same elements averaged over the earth crust; and (4) any resultant soil contamination will be small ec= pared to the criteria established f:r recedial action in E?i's 40 CFR 192 sub-part 3 or E (copy attached). Note specifically the ' standards in to CFR 190.12 and the fact tnat they exceed substantially our levels of conta=inatica. The facility and grading plans are to be submitted to San Diego City Plan-ning Department and Coastal Cc==ission soon. Ccasequently we lock forward to your early approval of the request 30 we may finali:e our plans regarding the area planned for construction of a new fusion research facility. Very truly yours, 4M William R..wowt y Licensing Ad=inistrator .iRM:he A tar *-men : 40 CTE. 192 e =oum. D i I 1 y e 1 =% O O m p I N4 4 .9 f. p [,'. h m, -v.. -.w y. ~

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eg=_= In Reply Refer To: CAL--6030 GA Technologies lnc. P.o. scx m 4."~.cf 29 *une ic84 5 $AN Ct(Go. CA#c?aaA i2t:S (519) 459,0C0 1 4 Mr. Sen R. Kapel, Health Physicist State of California Cept. of Health Services Radioactive Material Licensing Radiologic Health 3 ranch 714/724 P Street Sacramento, CA 95314 i j

Subject:

Docket 05-5303

Dear Mr. Ka.cel:

Attached are two copies of the NRC policy paper which I sentioned in cur recent discussion. I call your attentien to the first paragraph of the discussion section of the SEC~-31-576 =e:c and its encicsure 2 (Su= nary of Disposal and Sterage' Cptiens), page 3 Please note that cur =aterial has less activity asscciated With it than the firs Cption '3elc4 which j E?A standards do net warrant clean up or centrol. 4 We anxiously await your official approval alicwing us to re=cve any restrictions en the regrading of the area with this sacerial in it. 4 Very truly yours, 4 4 ~[h M' l / fu' s nillia: R. Mcwry Licensing Ad inistrater "s*E.M :he P Inclosure: NRC Policy Issue SICT-31-576 dtd 10/5/81, 2 copies i 9 I 1 i l 1

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1, ce... somee, a Le a e . ai A a> ( y .eupperneneary >::es: .i. I: I 4 GA'Techacic<:ies, Inc. P.*0. Scx 35508 San Diego, CA 92133 A :ention:.Nilliam R. Mcwry .. Licensing Administrat.a p 1 e.- .In res=.onse to the letter: dated Fe':uary 2, 1934 and June 4, 19 %, signed bv. William R. Mcwry; !.icansa Nc= e 0145-30 is heret:y acended in part 2s follows: 1:: To. read: p g-2. , Address': P. O.. Sox 85608 li San Diego, CA 92138 l f: u 4 _ p, 4 l .Tc delete: n t- . Condi,'.ica No. 20 is deleted in its enti:ety. t t... 6 1 d I 1 4 t .Tc read:D i e 1 4 i 9.: Authori:ed use: ...i. 1 j 3G. I To be' used in a =cdifie-! (see condition 14 (au) Tech /cpc. pecjecto? .l ; j

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}; ..l I.' i ii.. i i .. -l; i .13,., The, licensee will pe =it ne persen to act as a radiographer until that persen hast' success!'211y cc:Fleted the training described in the application dated ~i Oc:O,ber 30, 1962. 4 li 3: l , i,.14.. (al)- The letter with attach =ents dated October 23, 1974 signed by 'I .!! Frank O. Bold end. the letter with attachment dated Mac=h 28, 1975, I. l,i ' signed by Douglas T. Tarney.. .s. .u g C e .e.- trt 8j t.; i

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,i, ., ' ',l.etter dated July 26, 1979, signed by 6.. Heesoran. . i. j j 'l ('aq).;' T7.e: talegra=s dated April i t. 1930 frum Frank Bold of G. moral Atomic:: Co. ' and, from Paul Sunde of :e3n Industries. !.!:........ !.*he letter dated March 29, 1960 signed' by '.lilliar. R. M. wry and , :. t ;-

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