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SRT-5 ISSUE NO. 4

1979 FEBRUARY 20-

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INSTRUCTION

SOURCE REPLACEMENT PROCEDURE.

C.;. o THERATRON 60 AND 80.

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ATOMIC ENERGY OF CANADA LIMITED- .

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COMMERCIAL PRODUCTS, OTTAWA, CANADA|

f a8602060286 051210PDR FOIAKREYSA85-721 PDR

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. A.E.C,L TI,:1. dTHERA;>Y EQUIP.Y.ENT.g

INSTRit!!C 4 .72TE tE*,Ct SAT-5ISSUE NUY3ER h

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SECTao:4A GENERAL '

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;cus inan one (1) catuorized A.E.C.L. person and one (I) essistant shallI, .:d t*

pc. s icipar c in this operction.

2. Prior to coc.cncement, the authorized person shall check that the followingequipment IS on hand.. .

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(a) pocket dosimeter churcer(c) calit rat ed radiation survey meter - Jordan type AGli-So-Sa*

or equivalent ccsctile of recding radiction field as lowas .5 er far cod a hich ron9e in the order o f 25 - 50 r /nr.

'(c) one wi-cores -oicer counter - Electronic Associates Ltd.type EA-1|J-A or equivalent having a low scale capable of<

,- reeci.,c in the rance of 0 - 500 cnunts oce minute and ahien scale of not ! ct s t hen 25,000 C.P. '.*,*

(d) . set o f coseco drce.sr hand!!ng tools (see dag. tb. 0-96-V-25)(c) h)dr*calic.fift truck for moving source transfer shipping

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cantainer-. , . , ,

rat 'a ('f ) gentry crene, , A.E.C. L. type 16f or equivelent with 5000 lbs*/ working ccpa'ity* .

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(g)) teletnerapy !Had Survey blanks in duplicateo

(h return shinping instractions and docunents

3 t?oM5 person: shall c car 0 - 50 n/r/hr and 0 - 3 r/hr pocket dosimeters -correct ly zerced together wi th on A.E.C.L. film badge. --

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h. Prior. to coer.once ent the Authorized person sh.sil: *

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(a) r.ake a survey of these creas f rom which ur. controlledpersons nay have to be evacuated in the event of a mal-tecasfer,

This arca in which the radiction field is 5 m/r/hror crect.?r will be coferred to cc the " Dancer Area"

(b) ' should an cccident cccur, be guided by the Of ficial.

! ' Atomic Energy Control Authority in the country in which,

you ere workinq(c) if iemodiate assistence is required, c nsult tho . Municipal -*

Police, Fire Depcetment or Civil Defense Authority(d) do not depend on - locked doors. See that gJords are posted

to prevent cntecnce to the " Dan ;er Area";' (e) report to A.E.C.L. RcJicrion lle:afds Section immediately

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af ter the Lntrancc to the " Dan"or Arca" have bcon securedeC3 '..

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l. Check that ihn shutter is in the civicd pc itior. by noting that the " shutterci:::,cd" r,r:en t i '.t i~. Illumin:le'! on the control panel and on the equipment'N .

t:eiere ontorin.; ts.a t rs .tr.cnt r ee.o . Cntar tho treatment room with a survey ;c.cter in the "on" pcsit ton and chect: that the radiation level is normal.,

2. 0;::ra te the curved ar... to thi horizontal or 900 position as indicated on therotation scale. '

3 Fcsition the cource tra:.sfer car.e appecximately in line with the head.

3. Check that the radia!icn level at both drawer onds is within the levelindicated on the rad *ation warning label. /

5 unleck the transfer cc.so and renovo the end prates.

6. Check the Icading card and note the location of the live source drawer e.g. _upper or icv.or cc:prtocnt. -

FOTE:

i'c to tha t ' the l ive :.ource decv.cr has a brass end pla to stamped wi.th thescurce :.oria! ne.ber and an arren indicating the posi tion of the source propar,T;.c due.ay decy.er is of stainless stoel and is stamped as such.

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_./ 7 Ch' ck tha t the nu dce stseped on the live drawer end plate is that Indketedon the shipping document and note that the live source drawer indicator(arrcw) is in the horizontal plane. -

6. Re:cve: ,

a) pov.cr -

b) air frem reservoirc) wires from solenoid valve nos, h3 & 11 and

wires no. O and no. LO to the compressord) light syster.sosca.bly - deg. D-93-V-26 Item Ile) rotice asse.dly - dwg. 0-93-V-26 item 10

9 Inct a I I iicm S on dwg. D-93-V-26.

f:0T . : (Applicabic cnly to ur.its equipped with singlo acting air cylindor)1:3. 10 involves the rea.:: val of the roturn spring. 1.taintain pressure on

itcc 16 while releasing tension on spring item 17

10. Re drawing 0-93-V-26, re:aove item 19,18, lh,16 and 17.

11. By means of the cranc and the adjustable sling assembly, hoist the' transfer. case until the du.3.y drcwer is in line with the head eporture.

12. Rc:cvo i t em flo. S - dag. D-93-V-26.

13 Very carefully rec!'ock the clignn.cnt betwcon the dummy drawor in the transferc : s e a n c ti.e i U ~cI- 3.r in the cobalt head. Block and shim betwoon thetrancier case c id r e-Scrc ar.d the floor as a ca f oty precaution. Install item ~. .

9 (dag. O-?,'.-y ':!.) c t t er rouoving core insert in the dummy drawor, as !!!us-tra te d in dwg. D-?3-V '/6.

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gh, .r;ic. tto etrwej r tar ir e.ei.h a ; e . i s ; .'a t h i t it is not sut,jected to the' e.

ir:Ident tes? d .r i .; l' e trans f er, but in such a positien that tho motor,

{s ::.:1c ray be vi c.. > bf ' asth peric.u. U,e the O to 90 r/hr scato.,

Ic, Incarc that all p:u 3.; ays n!'ove. * etc.. ar c hoth sidos, are controlled sother:o in re s ;' ility of et:.cr persons teing exposed during the

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tesnsfer.

se.CT:CM - SCNCI R ??N'.L ,

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..:k pocket de-ixcters for :cro prior to starting.l. s

fron yavr assigned posi tion during ts.e cource transfer without first2. * uer esvaetscrving tha survey at r and advising the other person of your intent.,

3:ever use r.tero f orce to ef f ect a, transf er of the d rawer into the head of thetnit than is required. to ocyo the drawer in the transfer case.

h. Ecth persons shall take positions behind the transfer case. It will be theduty of one person to operate tho "T" bar to withdraw the source and thea:sistant sha!! Lupport tho weight of the duncy drawer as it is withdrawnfrca the tran!fer c:se.

3, Check that the sa v2, eter is within reach cf either or both persons. Chock

that t he diaphra;r. is atminimum opening.

6, ine catherized * ersen. af ter notifying the other of his intent, will gently draw~Tc t ivl~c~ra..cr t nrough the Ccbalt c0 Head until it comes in contact withs t : c. o

hd C3 tt.e darny dras.er, a t v.hich tico he will cont inue to draw the old live drawor into''ith the assistant supporting the weight of the dummy deswer,the transfer c:se. ..

the actberi:cd par c.n will discennect the "T" bar fro., the live drawer. Dis-

:e .r.e:t der. ar p.sh rad i ton 6 dwg. D-93-V-E6. Install the end plates on the

'r_r.sfer caso. -

Carry ost ir.o test pra:cdure using the geiser pecto as detailed in 0-1L21 throast.7 C- tLOp. Any waste di:pcsal shall be daalt with as outlined in Bulletin VO-3 'part S S*cction no. I.

8. Cc:plete any streicing and/or repairs necessary. - .

9 ', Af ter all Lorvicing a-d/or rcpairs have been satisf actorily completed, test thedacr inter!Ock :..-i tch as f ollows:

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(a) Close the door to the treat. ent rcom ,

;b) Gat up the recato control f or a simuleted treatment| (c) R2 cove wi ro 'ic. I l f rom all solenoid valves and connect anA.C. '<;I t . tar ..ith the range selecting switch set to rend

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0 - 1,00 volts a.c.(d) 0;)cra te it.2 uni t wi th the shutter in the "on" condition andI note that the ".'oltaoter indicatos a scale reading of |15 volts

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| (appecx t e.a t c l y)' .(o) Open the tre:t ant room door and check that the noter reading| is O voits.

(f) Rept:t at least 9 times.t

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: e CA th7 Cois :r ico .t e hu be. ca t itr ?cJ agsinst ACCL standards. InA

the United :tates tre l i er v .-.; ~ ;t b.: na:ifi.sd if the wipo test Indicates''\ centsninstion of .03 ".ic:;-curie. Or t:ro. A rt iding of 6,000 counts per minute

is chual t o .C~s mi'.re urie . . lith a ge,00:ry c e?pec4instely 35%, a winden ofI'.3 ..i t li-,,ran:./c.:ntim. : r . 9nred aro! a cent ir. cf f iciency of b;., a scale.

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resjir.g cf C.600 counta par ioute is'er,9al to .33 micro-curies. Any removablecen:-v. i ..st ica cf this level cr greater ::ast bc re!.orted to the licensee, who in-

cact advice the appropriate offic; of the U.S.A.E.C. This condition shallt ersbc r. corted to t ne Ra jict ica Hazards Sectica in iICL. Follow all instructionsi su..; by the E:gional Of f ice of the U.S.A.E.C. In the arca in which the equip-ment is located. .

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!:.o Drag' Brake*

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tea sf9r e.ase..-(:ap. 0-33-V-|.,, . .,

* ive Ordwar is in th3Then push en th.e."I" h..ndic unrii ..s. .. . o

Ocbsit Head as tar as it will go. Th.is is encacated by a reg'ister mark-- e . -v . . r-

:n the "T" bar ,h.2-di s.t.ich will be (appecci..stely) the end. face of the'

c.:.; dra;;er.

/; . 'isconnect the "T" bar, insert tt.e filice section in the dummy drawer.Feston the end pistes on tna trcasfor case end remove caso to a convenientpcsition.

7 nstatt in this ceder on those eqJipments s;pplied with single action aircylinder only. ,

i t or. S drcaing 0-33-V-26'

item 17 decwing 0-93-V-26iten tb dra:;ing D-33-V-26itun ih drawing 0-93-V-26 .*

item 16 drawing 0-33-V-26item 19 drawing 0-33-V-26

7A. In5f ell in tnic cre.rr on those equip =cnts supplied with the double actingtfpe air cylinder.

item a drewinc 0 n3-V-26*. *

i te . 07 drawing 0-33-i-106 .

!!e 1 C0 cre c. i ng 0-33-;-104-

ite, C3 dre nir..; C-33-A-I C4 .

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0. Re..ove item 0 ( 30<c)..... 5

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(, . Ce: car.c-t c I I s. f r I r.g .

10, i'ar t cc !r.c fcl!-.;..; v;.v a1i.:.0:,

$ (a) c ! c;.0 t ? c i- e !c :. J toea:Nnt r c. ,1

(c) :.: t up t r.c rv. .t e c ; s.t r% I for a .i.r.leted treatneritgc) .cr..rato tne t. nit with ! !.- : l.u t t er in the "on" cc,nci t ion*

(d) cp.n it. * ds.r !:, t ' e t re.fraent rc.a: and note t hat the " shuttere l;; :r 1 -- - M * t e ly cr.c IPst ito "rcset" cor. trol cu: t be re.,.:m va :e.: :. r .ra 7: c LLutter will cpen (ered lights on control

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un;t sr.J cr, I: ent)

(c) rcpest the at:n :.t least 5 tiees,.

II. l'arfer.,hc.id servo, and fill in the blank forns.,

12. tti t h the di3;; hec.- se t to th2 c.: .simum opening, and the shut ter in the openpcsition, ;v.ri .- . a radiation servcy on all external surf aces 4 8 the trest-

c :2nt ro.w io, in .re ::.s t tr.cre f.rc no obvious de f iciences in the; roomconstrvction.

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f possible, 12 c::c ro shculd bo p.>rformed in the cc=pany of the customer'sphysicist.

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'' SE: TIO:: E CC::0LUSIO. *t-

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I. .\\l cource dra. acts, tcols, trar.sfor cascs are free of any contamination before

Fce.cver, c':cck off tools, etc, before packing for return shipment.ship ent. ;

2. Shcu re t o., level cc.E.t:.mina t icn b encountered, a ll wes te, ' e tc, sha l l be.

handled as outlined in Dulletin T3 '.*D-3, aficched to this instruction..

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'ATa'.'IC C :IRGY OF CANADA t.IIAITED

C3*.'.".IROIAL PRODUCTS DIVISIONOTTA?iA, CAftOA.

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