ML20059A408

Forwards from Urenco to Duke Engineering & Svcs, Inc Per 931213 Request

ML20059A408
Person / Time
Site:	Claiborne
Issue date:	12/13/1993
From:	Leroy P LOUISIANA ENERGY SERVICES
To:	Jim Hickey NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
References
NUDOCS 9312300152
Download: ML20059A408 (12)

Text

{{#Wiki_filter:. paw ~ LOUIS %4A ,,,or,,c. w,oog { Churlotte, NC 28201-1004 December 13,1993 Mr. John W. N. Hickey, Chief Enrichment Branch Division of Fuel Cycle Safety and Safeguards, NMSS U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Subject:

Docket No.: 70-3070 Louisiana Energy Services Claiborne Enrichment Center Safety Analysis Report Revision File: 6046-00-2001.01

Dear Mr. Hickey:

As requested by your letter dated December 13,1993, enclosed is a copy of the letter dated October 19,1993, from Urenco to Duke Engineering & Services, Inc. Please call me at (704) 382-2834 if there are any questions concerning this. Sincerely, fh $ Peter G. LeRoy Licensing Manager PGl/N107.123 Enclosures 1 230015 i 1- '9312300152-931213 9 kt j- 'PDR ADOCK 07003070 'C PDR j =-

1 . December 13,1993 ' Mr. John W. N. Hickey, Chief - Page 2 e xc: (1 copy of enclosures) Ms. Diane Curran, Esquire Harmon, Carran, Gallagher, & Spielberg 2001 S Street, NW, Suite 430-Washington, DC _20009-1125 Mr. R. Wascom Office of Air Quality and Radiation Protection Imuisiana Department of Environmental Quality PO Box 82135 Baton Rouge, Louisiana 70884-2135 Ms. Nathalie Walker Sierra Cleb Legal Defense Fund 400 Magazine Street Suite 401 New Orleans, LA 70130 t t t b b a I ll i l

umca u.e. r;iceAsT. s. m. 7. ic. := Peat'020 i s,1a,n 1sixs j FACSIMILE TRANSMISSION l UPD RefNo: 3n7 UTCDCO Telefax No: 051 347 3181 (capenbursi)).imited Capenhurst, Chester, Chestdre, CHI 6ER, England Telephone: 051 347 3577 t Telephone:(05I) 347 3900 Direct: To: Hy, A j.;,,yy) Facsimile No ' From: Rll <. e shw An: Von: i Ann: Van; i Copy: Facsimile No q Pages Date i

1. ~W 4 ' 38Z I

Kopie: Seite(n) 9770 i Cople: Pagina('s) l

Subject:

I I Hugh. 'I Fb l., k b h h o 's. cuhl you a%r, J'// /ry a I o re c h u lt ~ d 8, p e,s N,c s e,,,, c, [, II R n n l assR*D4ep.nc; RECENED i 'r ' OCT 191993 / ppg (c,()4tS- 00 -2402.0 2 Copy to .i> H A h' .b-.. .._.? A i i - XC:CR (/[ > T.. 7-Psm,.r_da i sI 1 PLEASE NOTE: If you do not receive a good copy please contact us either by telex or telephone. HINWEIS: Falls Sie nicht eine gute Kop e ahaiten, setzen Sie sich bitte mit uns in Verbingdung l durch Telex oder Telefon. Danke. ATTENT15: Als U geen duidelijke copic orniet het juiste aantal pagina's heeft ontvangen, wilt U dan _ _, pnemen via tefex of telefoon. Dank U contact o i a

19/1 W93 16:33' 1 ret CD. U. P. D. CAPEt HP5T. B. 707. J. IO.244 P302/010 d Jari. *J2 12:59 0033 tr< Hill JLELICH TEL *dl9 24G1 65277 ' D. 2 6 4/09 20+01 ,u 5170 Julich Te!,: (02461)6S(0) Stetternicher Stutsforst Tc!cx: 833 531 uranft d Telefax Nr. l bb Postfach 1411 Tc!ctex: (17) 246131 02461/65377 GmbH PACSIMILE TRANSMISSION An: C. Mo!, UCN Absender/ Sender Name: Dr. D. Daum c/o Uranit To: Tc!.: 65 378 Kople: A. Lorimer, Urenco Ltd. Ref..No. AB/03/92/Da/B0 E. Kraska, Urenco Inc. i CC: File: } Betreft: NRC-questions Anzahl der Seiten: //

Subject:

No. of pages: Bezug: Datum: 17.01.92 Ref.: Zeit/ Time: Ihl ~3 "f(CPR92// 14lNh. f Gentlemen, attached the requested info for NRC on radiation ponection in Urenco-D p.r%te& carbon-hs, I Kind regards ht,M l i v I U C.N. ARCHIEF 2014N.1992 000802 yg c. -..-.. 7 q _ ..j. I 1 I I I l -__~._

19/10 93 16:33 OPaco. u. P. D.,cupMFST. B. 727..T. fp.2iq, j a03/010 m i i Eadiation Prp!ggtion in Urenco-D Results of monitorinn Ibe actual exposure by Uteneo D The safety department is monitoring the actual exposure. It is obvious that there is a wide spread of the indivdual exposure depending on 'he specific job being performed in the plant. The present results for the following three groups are: Container 11andling personnel < 150 mrem /a (internal transport etc.) Pro:ess operators < 50 mremla Supervisory personnel < 20 mrem /a i j Taking into account that at Gronau in total 74 peopic (in 1990) are behig monitored for the potential exposure we have calculated from these results an average armual exposure of about j 35 mrem /a. It should be noted, however, that these values are far below the ALARA value and will change with increasing capacity. Radiation orotection scheme for the nuclear licence It should be noted that for the application of the nuclear licence a radiation protection sche. me was developed assuming a higher upper limit for the annual radiation exposure of any individual enrichment worker. In the case of Gronau this limit is 1000 mrem /s. This figure was arrived at by assuming theoretical maximum exposure lelvels and times. In additbn it was assumed theoretically that the individual would do all the work in which several people l share under normal operating econditions. 1 I i i i 1 i

4HURST.B.727.J. to.244 P00uB10 19'.10/,g _ 18,{4 ] {y g j. w 4 NO.2bi P031497 + 31 54900317 ,8 1992-01-16 11:30 + 31 549345317 P.01 1- "f18' a vl roce/(92/D/ I' l SH i Planthofsweg 77. 7601 RJ Alraelo Postbus / P.O. Box 158, 1600 AD Almelo Telefoon 05490 - 45911 Telephona + 31 5490 45911 i Telex + 36513 i i Telefax 05490 - 18296 Telefax UCN BZ 05490 45317 Ultra contdfuge Nederfand N.V. FACSIMILE TP.ANSHISSION J } To: Urenco inc. From: UCN, Almelo Attn. Mr. E. Kraska C. A. Mol/8.E. Miles i Tel.: 05490 - 45504/3610) Copy to: soo below Ref.no. BZ 030/92 TV: 2E048 j 4

Subject:

CEC NRC qusstions. Number of pages: 7 Orutuding this page) Your reft Date: 15-01-1992 l NOD copy to: A. Brown - SNFL A. Lort ner Urenco Ltd. D. Daum Uranit 1

9. Dekker

- UCN H. Baan UCN C. Andrews Irvina i )!adiation Protection (14R 8.01 from Urenco UK. This is attac$ed to this fax,posure has now baan recaf Further to our fax 18 12 1991 the dttt on ex together with a note attempting to reconcile the NL and UK data for the groups with the greatest doses. Kind regards. Ultra Centrifuge Nederland N.Y. j r C.A.Hol/B.E. Miles

• i 16:34 (PDCO. U. P. D. Cr$9 H.R5T. B. 707. J.

to.244 POO5/010 19/10/93 ~'- ~ P/:54-Cl-1b 11I3;I +.n aqwon *

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Q BRITISH NUCLEAR TUCLS plc Q[y a eg[ CAPENHURST WORKS y NOf.g j ENR}CHMENT D& VISION i l

SUMMARY

OF WHOLE DODI RECEIVED BADIATION DOSES FOR PERSONNE i WORKING IN URENCO CCNTRIrUGE PLANT C22 CAPUNBUR$T WORgg INTRODUCTION Recalved whole body exposures Insulting from external exposure to ionising radiation has been summarised for three groups of workers associated with the Urenco Centrifuge Enciclunent Plant E22. These groupe tres Hex handling Group 572 E22 operations Group 593 shift engineers Group 640 The average dose for each group is shown in appendix 1 for the years 1987-1969 inclusive. This shows that the average exposure is low and constant for this plant. The exposure is listed in quartors. Since this is the periodicity of film badge issue for male radiati.cn workers. g l a c.n..-... 1 t i 31titt.lhi 016 618..l \\ ~ %).,'.. Prigary causa ee nonnurm

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.e j j 3 The externai exposure is received as a resulted exposure to 238U and daughters. The table below lists the most prominent gamma energies and sourca nualjde. Table 1 Source radiation (external exposure) 234Th 49.55 kev 231Th many I's most prominent, 155.4, 195.9, e gPa.8, 118.6 kev 92 kev 234Pa many f's most protninant, 158.5, 200.2 kev Thora is an additional exposure fro:n Breastrahlung radiation generated by beta, interactions in shielding material, however for the years summarised there is no contribution from reproce.ssed fuel. 7,,gt e rn a l Radiatiop Dretection The E22 plant has no specific design shielding built in for radiological protection purposes since it was recognised that dpses to operations perconnel would be low as a result of low occupancy near to the hex containers, in addition to the shielding provided by the feed container chests which have a typical wall thickness of 6-10 oms. Doses to the hex handling group and shift engineering are rostricted by ensuring ihat the time opent near to the containers is kept to the minimum necessary to conduct the work / task.

~-19/d0/93~~ 16535' UREHra. UM. D. CWEtMRST. B. 707. E. td.244 'Pa06/010' ~ - ;,- *t. 354-01-11e.111JV e _31 *.AW46,51't F.03 ~ ' j _, ,6 g' Aggiation_ Worker Desionation i Two citssus of radiation worker-are recognised within British Huclear ruels..The first group termed " Classified ~ Dersons" refers to those persons who could possiblY receive greator~ than 3/10 of the UK doer. limit (currently - set. at 8 50msv, (5 Rems)). The second group is referred to as Non Classified Radiation Workers, this is a company-. designation and is applied to i and 3/ personnel who could possibl.y: receive between 1/10th thoso i 10th of the dose 11mlt. The appropriate designation of the groups studied in this document is rncorded in Appendix 1 for information. t i Classified Person i CP = I Hon Classified Radiation Worker. MCRW = I i I i ) I i DFL 8R HORE i Health Phyoico 6 Safety Dept December 1991 I l \\ .I

L 19/10 m %:35,,,,, URB g.U f.D,.,Cffa M RST.B W.]j p.,,j y 244 P007/010 j p,m y ' -{ OCCUPANCY Doss t The in undertaking work for E7:following information refers to the time spent by Plant which could give rise to an occupationaA exposure. 193 r22 opA LThe work is carried out in two areas. 1. The Ur6 Duilding j 2. The LSA (11guld sampling room). 1. ri/a. Hon work 6 hours per shift in the Ur6 building. Therefore 30 man hours par shift. 252 shifts per year. I TOTAL = 7560 hours per year. i 2. 1 man works 4 hours per shift in the LSR Therefore TOTAL = 1000 hours por year. r% 572 Mar handlina 5 men (approx) worka 4 hours per day moving hex containers. Therefore 20 man hours por day Therefore 5000 man hours per year i 3 con (approx) work 1 hour per day on used containers. Therefors 9 man hours per day therefore 750 tsours por year. i l $40 Ahi f* Fittnen em 2 men work 1.1/2 hours per day connecting / disconnecting hex cylinders. Therefore 3 nan hours per day 750 man hours por year. 4 k

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19/10/93 16:36 (ret 4CD, U. P. D. CAPEt MRST. 3. 707. J. !O.244 P309/010 }..- 19'J2-01-16 11140 + 31 549045317 P.06 t Page 6 I I Radiation doses - coEDariton NL and_ UK dath prominent sources of external radiation.e uranium daughters are the most As shown in the note from Capenhurst th Operatora receive the greatest part of their occu)ational radiation dose When they perform tasks near to the "hool' left bo tind in a container which has been emptied of Uf6. Such issks include the disconnecting / reconnecting of such containers and their handling (transport, Weighing etc.). Since similar groups do not necessarily perform the same tasks at Capenhurst and Almelo and the numbers of workers monitored are not the same, the cumulative total doses in man mSv are compared for two groups of tasks, SP4 against E22, which cause {he largsst part of t!1e cumulative

dose, i

The tab'e of exposure data for Urenco NL workers, revised to includo the number of workers monitored, is presented again hore as a btsis for the l comparison. LD VALUES [msv/y) Number of Avsrage Hin.

• Max. **

Department monitored dose dose dose workers Enrichment [$P4) 35 0,20 0,01 0,25 Operations 1, Total) 68 S1ending Operations 6 0,40 0.25 0,60 l Container Handling 5 1.0 0.60 2,50 ) l Oncontamination/ 7 0,02 0,01 0,30 Decomissioning 4 _0,04 0,01 0,10 Maintenance I nin. dose in the group.

• • : max. dose in the group, Note: TLD - Thamo Lumir,escent Dosilnator, i

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ipn0M3 16: 37.,., tLR,ary. u.,P.J3. CAP 9MRST. B.,7fy._ i,0. 244,,,, P010410 Page 1 .A .:c; k Tast group W (pgand1!ngsi<:jno, dfresnnectino containern wittin the UF6 and_b"ending g g l _an 1fn the buildinas ( nelue tna liquid samolJ nol Plant Group Number.of Average Cumulative Total dose monitored dose dose for for activity) workirs (afy/yr) man (man mSv/yr Nt. SP4 operations 35 0,1 3,5 NL Blanding 6 0,4 2,4 Operations NL 5,9 I UK Ett Operations 44 0,16 6,6 UK $hift 36 0,26 P,7 Engineers I ,UK 16,3 ( !E . aff.y b Task-group: gniainer tranggortAthe tita Plant Group Number of Average cumulattve Total dose monitored dosa dose for for activity workers (mSV/yr) __mSvlyr)[ man (man mSv/yr) group f HL Container 5 1,0 5 5 handling l VX Hex handling 8 1,03 8,2 8,2 Notet The shape and gosition of the heel in an emptied Capanhurst container may be different since the feed is not liquefied. The source may be effectively nearer to the operator. The number of operators (or operators and fitters) actually involved in a task such as connecting and disconnecting of a container may be different. as airstdy mentioned for capsnhurst there is no At AlmeloIon from reprocessed uranium for the y, ears surnmarised. contribut 1 1 4}}