ML19220C537

Application for Matl/Byproduct License to Authorize Possession of Any Byproduct Matl W/Atomic Numbers 1 Through 83 Inclusive

ML19220C537
Person / Time
Site:	Crane
Issue date:	04/18/1977
From:	Arnold R Metropolitan Edison Co
To:	US Atomic Energy Commission (AEC)
References
NUDOCS 7905110176
Download: ML19220C537 (51)

Text

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'F.,. AEC-313 UN:TED STATES AfoMK. ENERGY CoMMI551oN

,--.a i o Cr? 30 APPLICATION FOR BYPRODUCT MATERIAL LICENSE

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e-a "-'* 2' INSTRUCTIONS --Comp lete items 1 through 16 af th.s is an init:41 apphcation or an a:pbcation for renewal of a bconse Inforr9ation contained in p,e-vious a;CtsCattons filed w>th the Cor9mzssion with respect to items 8 thrCugh 15 raay de encorporated by reference o,ovided rete,esces are clear and spdCJfdC Use SUDPl eft' ental sheets wnere necessa,y ftem 16 must be Cornpte!9d on a l appbcations Mail h.o cap.es to: U S Atomic Energy Commis-von. Was'ington. D C 20545. Attention: Matenals Branen. Directorate et uce-sing ucen app, oval of this appbcation, the a;phcant will recei.e an AEC

'M eyproduct Matenal Ucense. An AEC Byproduct Matenal Ucense es issued in ace:rdance with the general requirements contained :n Titte 10. Code of Fed-erai segu sinons. Part 30. and the Ucensee is sub.ect to Titie 10. Coce cf Fe:e,al Regulations. Part *0. andthe lacer'sa7ee prp+oop'4' 5cee of e

Fedora: T4egutabons Part 170. The hcense fee catecory smould be stated.n item 16 and the s;propriate fee enclosed. ((ee Note +n +rtT'sugic Sn e -

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t. I.) NAuf AND STAEET ADCAESS oF APPUCANT pr.sreri,fron, farm.,icsp.rW p.r-

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y Metro,nolitan Edison Cc=pany Three Mile Island I;uclear Station k

E Post Office Eox SL2 P.

O. Box LSO Eeading, Pa.

19603 Middletown. Pa.

17057 Phone #:

(215) 929-3601 g 3; - ! jf I',/.

2. CgraafugMT 70 usg syreCouCT MATERIAL 3 PRE viOUS LICENSE NV8.alI($L (If A....e p,.C.,

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Radiation Protection and Chenistry

hree Mile Island IIuclear Station

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Supervisor of Eaa..lation Protection

& Chemistry

6. (c) l'PROcuCT.AAftt:AL.

(II Ibn CHIMICAL AP*C/CE PMYSICAL FCav AND mAILMUM NuuSES OF M.LKJtf E5 Of ( AC. CNf aa# CAL ANO/Cf PHY3-

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Any Er-Product material Fixed or loose upcn surface and/or contained within equip-with Atomic ?io(s) 1 l

ment.

The total activity not to exceed 3 curies.

through 03_ inclusive.

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RECEIVED BY LFMB Apolicant. - - - - - - -l - - - - - - /

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Page T.o TR AINING AND EXPERtENCt OF EACH INOlVIOUAL NAMED IN ITEM 4 iu....co w eaan. >>..,i a.c no,r )

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c Film Badge service frc= R. S.

Landauer, Jr. & Cc. on a monthly basis.

Thernoluminescent Dosimetry on a.ncnthly basis.*

Either method cay be utilized on a scre frequent basis as needed. Victoreen or '4=.

B. Johnson Self Eeading Dosimeters on a daily basis.

INFORMATICH TO BI SUKMITTED ON ADDITIONAL SHEETS IN DUPLICATE li3 PACrur'ss AND tcuiPaeNT.

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-.me CIRTIFICATE (This item must be completed by applicant) y.4 se ; t AP uC ANf ANo ANY CFriCIAL f xf CuhMG TMis Ctf71PICATI QN $[MAJ CF TNf AP*UCANT NAMio IN ITIM t, ClthPY IM A f IMI$ AMUCAflCN ls

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.f t*.ito iN Cc%FosuJTv wifM TI7tt 10. CCCE CP FE0ttAL aEGutAMCNs. P AJtt 30. AP.o TN AT ALL IN8cIM&flCN CONTAINf o M(aflN. INCLUDING ANY

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spPL!w(NTs ATTAC>to pittTO. Is Itut ANo COttECT TO fME list C7 Out aNowltoct ANo stL:!P r

0 Exernt as stated in. :

~~' ' 'setropolitan Edison Cenpany i

O Ch '70.11 (3) u.as. r c.mery :

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April 13,1977 R. C. A9nold r.n..e c.,

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• TLDe s processed on n.te in accordance with ec=pany procedures, S.:

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bad e service vill be dropped in favor of "LD's.

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m Revision u

,er.J i;:lE MILE :1LA'D '."JCLEA.~ STATIC

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UUli =1 HEALTH PHYSICS FROCEDURES 1635 - In>tr cm.snt ca iibration - Technical Cperaticns Inc.

Calibrator !'odel 632 (50 Ci Cs - 127) s 1.0 PURPOSE tu outline the steps to be taken The purpose of this procedure i:

when using the Model E82 High Range Calibrator.

2.0 DISCUSS 10:!

consists of a pri:ary shield, 50 curie 2.1 The Mod 21 662 Calit.riter Cesium-137 scurce and an exposure charber in which instruments An intense field of ionizing may be olaced for calibration.

radiation can be generated in the exposure chcmber by excosing Goth the primary shield and I

the cesiun searce to its volume.

thi exposs. e cuarciber ci e le d-si:isioed to keep externai radia-('

is in its storage tion levcis to safe limits vihether the source s

or its exposing position.

A sliding door closes the exposure A mechanical chamber, except when the source is sa fely stored.

interlock absolutely preve..ts access to the exposure chamber when a high radiation field is present.

Primary Shield 2.2,

General _ - The primary shield consists of a steel-encased, 9 in.

2.2.1 diameter lead cylinder containing a 1 in. inside diameter axial tube in which is slid an encapsulated, high strength cesium source attacned to a scarce bar. (Radiation level on exter the side of the primary shield tainer is less than 3 ra/hr.)

On is an aperture servir.g as a collinator to restrict the emergent The collimator is designed to accept

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radiation t.o a conir?! r ean.

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a series of absorbing lect stects of di'ferent thict.n?sses

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to permit adjust.ments of the radiation intensity within the calibraticn chan'oer.

2 - The 50 curie Cs-137 source consists of a ccmpacted 2.2.2 Sour:

cesium-chloride pel et, doubly encapsulated in welded stain-s Its active dimensions are 1 cm diameter by 1 cm long.

less steel.

Cs-137 decays with a half life of 30 years, or about 2% per year.

Its gamma radiation consists entirely of 0.66 Me'/ quanta, and its specific gan=3-ray constant is 0.33 R/hr at 1 m for every curie; thus the 50 curie source theoretically produces an ex-posure rate of 250 R/hr at a reference plane 10 inches distant from the source.

Source Bar - The source capsule is mounted on the lower end 2.2.3 of a tungsten alloy source ber, 9!hich serves bot.5 to suppcrt

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the source and tu prevent gamma radiation from energing along the axis of the primary shield. The bar itself is attached by a lifting rod to an exposing handle, permitting the source to be raised from its storage position at the lower end of the axial tube in the primary shield to its e.xposing position opposite The sourct.s held

. the small end of the collimating aperture.

in this position by a detent pushed by a spring into a groove in the lif ting rod.

A padlock fitted to the exposing handle allows the assembly to be securely locked with the scurce in its storage position.

2.0

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96 252

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Collimator - The collinator cor.sists of a square cross

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2.2.4 section conical aperture in the side of the primary shield.

Its purpose is to constrict the emergent beam into a 7 in.

x 7 in. square field to simplify the insertion of attenuators.

s Most of the collimator is box-like in shape and is tapered The size of the box st the face of only at the small end.

the collimator defines the size of the radiation beam, t

Attenuators - The intensity of the radiation beam emerging 2.2.5 into the calibration chamber may be reduced by insertica of For this various attenuators into the collinating operature.

purpose, one or more slabs of lead can be placed in a removabl Nine steel holder, which is then installed in the collimator.

lead slabs are supplied.:ith th: calibrator, providing attenua-r\\_

tions as follows:

No of Lead Attenuation Slabs Thickness Factor (Inches}

f, 1

0-148 1.5 3

0.250 2

2 0.398 3

1 0.584 5

2 0.834 10

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The atter.uation factor is clearly marked on the edge of ea

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7 culte 526 P. O. Ecx 72k6 Louisville > KY h0207 96 25'?IU57

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lead slab.

To minimize radiation leakage around these attenuators, the slabs are kept as near to the source as possible, using aluminum spacers that may be inserted between the slabs and the face plate of the holder.

s Excosure Chamber - High-intensity fields for calibrating instru--

2.3 It is shielded with ments are produced in the exposure chamber.

4 inches of lead in the direction of the radiation beam, and elsewhere with 1 inch of lead to reduce the transmission of The volur.e

. radiation scattered from objects within the chamber.

of the exposure chamber is sufficiently large to permit pre-Its

sently used survey instrumentation to be calibrated.

I internal dimensions are 9 inches wide,16 inches front to rear, The e.is of the radiation becc x

and 16 inchas top to botto,.

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is horizontal and enters the chamber at a point 4-1/2 inches The in-from the rear wall and 7-1/2 inches from the floor.

tensity of the beam is measured at a standard reference plane that is perpendicular to the beam axis and bisects the chamber.

Unobstructed radiation from the scurce strikes the reference

, plane over a 7 inch by 7 inch square area centered around the The geometry of the collimator is such that little beam axis.

radiation reaches the reference plane at points' outside a 9 inch by 9 inch square arca.

An additional part in the front wall of the exposure chamber permits

. 3.1 calibration of the Teletector, a survey meter in which a scall probe detector is connected to the remainder of the circuit through a b

telescoping tube too long to fit into the exposure chamber.

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The p&rt allous the detector to be brought perptnJicularly to the beam axis at a point 1 inch away from the collimator f^

b face, thus providing a max mum intensity of 500 3/hr, approxi-mately double the value at the reference plane.

The calibration chamber is closed by a sliding door that is 2.'3.2 shielded by 1 inch of lead and includes a 2 inch ' thick lead

'oability.

glass windou of equivalent radiation shielding The door is fitted with four pairs of ball bearings that roll on steel tracks along the front and rer.r edges of the cali-The door i.otion is restricted at each end of its bra tor.

travel by stops along the side edges of the calibrator.

Indirect illumination within the calibration shamber is pro-2.3.3 vided by tuo 15 watt lanps.

Inter'ock - Safety aeainst inadvortent exposure of operating 2.4 personnel to high-level calibrating radiation is provided by a foolproof, mechanical interlock that positively prevents opening the door when the source is exposed and positively This is prevents ex?osina the source when the door is open.

achieved in a very simple way by designina the posicion of the primary shield so that when the source handle is operated, it just clears the edge of the door in its closed position.

Thus when the handle is in any position but the source storage position, the door is prevented from opening, li'cewise, when the source is in its storage position, the open door conceals the handle and prevents the source from being raised.

5.0 96 256 87057 L

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.: cision 0 ho.evr, this one can be defeated.

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Like ess; fr.tcricd: 3.

It veili not fulfill its purose if the daar has been If it beccmes necessary to removed frca its tracks.

remove the dcor, lock the sourcq.

3.0 REFER 3 CES Instruction Manual - !'odel 632 Calibrator - Technical Operatio 3.1 Inc.

Calibration of Teletector 6112 H.P.P.

1756 Operation ans Operation and Cclibration of Rad Owl R0-1 H.P.P.

1760 Operation and Calibration of Radector III H.P.P.

1755 14. 0 EQUIP:4ENT 4.1 Model 632 Calibrator 4.2 Plastic Elecks C

4.3 Attenuators

nstruments to be calibrated, e.g.,

4.4 1 - Victoreen Radector III - see HPP 1755 2 - Eberline Teletector 6112 - see HPP 1756 3 - Eberline Rad Cwl - see HPP 1750 4.5 Film Sedge I

4.6 '

Dosimeter 4.7 Source Cage Key 4.8 Calibrator Key CPEPATI'G IGSTRUC.'ICMS 5.0 Inforn the control rocm tnat you are going to calibrate 5.1 portable instrunents in the Heat Exchanger Vault.

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1f35 the entrance to ti.e Heat E:Pn;er Vault and Lock the door at 5.2 place a Radiction sign On the outside.

Remove the steel holder from the attenuator acerture by 5.3 lifting the two sliding locks that secure the holder to the s

counting studs in the collimator face and withdrawing the holder from the collimator aperture.

After choosing an appropriate attenuation factor, insert the 1635-1).

5.4 appropriate slabs into the rear of the holder, (see Table Fill the remaining space between the slabs and the face of holder with aluminum spacers to prevent the slabs from fa i

forward.

Insert the holder into the collimator aperture, pushing down 5.5 the sliding leks on the studs to secure the liolder in place.

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Install plactic blocks and instruments supports in the 5.6 bottom of the exposure chamber so that the sensitive vo the detector to be calibrated will be centered on The position of the beam axis is marked by tion beam axis.

black lines on the interior surfaces of the exposure cha: der The plastic block is helpful to locate the position of the 5.7 instrument relative to the right side and rear wall of the exposure chamber.

Place the instrument to be calibrated in tite exposure cha 5.8 with its electrical circuit operating and zerced.

Close the sliding door.

5.9 Af ter unlocking the source handle, lif t it to the end of its 5.10 it travel, brincing the scurte to its exposing b

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J.f t.er recording the reading of the will be held by a detent.

instrunent, return the scurce to its storage position by pushina the handle all the way do.:n.

If adjustment is required, remove the instrument and make the 5.10.1 appropriate adjustments on the calibration section of the instru-Pefer to HP procedures listed in the reference.

ment.

Repeat steps 5.8 through 5.10 to check calibration.

5.10.2 Proceed as above to Open the door and remove the instrum.ent.

5.11 calibrate other instruments as desired.

To ce ibrate the Teletector, place the oesired attenuator slabs 5.12 in the holder and install the holder in the collimator aperture.

Af ter removing the dummy plug from the part in the front wall cf the calibrator, insert the Teletector probe and extend its

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telescopic shaf t until the probe is centered en the radiation Close the door, expose the source, and, after beam axis.

instrument readout, return the source to its storage position.

If adjustment is req; ired, remove instronent and make appropriate 5.12.1 Refer adjutt:nents to the calibration section of the instrument.

to HP Procedures listed in the reference section.

5.12 to check calibration.

S.12.2 Repeat step When calibrations have been completed, close the door and insert 5.13 the padlock in the tole in the lifting handle to lock the source in its stored position.

6.0 USE OF ATTENUATO'.S:

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... vision 0 Tabic 1635-1 cruains 3.r cle ex:::rre rates neasured at the h

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reference pla:2 of thc :: dcl 652 Calibrator using the part -

cular Cs-137 source and seve.-al combinations of atte The atteriuator or cc. bination of attenuators is chosen by i

selecting the dose rate desired by using Table 1635-1 and us n the curve on Figure 1635-1.

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R/hr Intensity (I) (II)

Attenuation Factor Nominal Observed Reference Plane Probe Position 453 1

1 239 1.5 1.57 150 285 2

2.10 114 216 3

3.20 73.5 141 4

4.20 56.8 103 5

5.25 45.5 86.4 7.5 8.05 29.7 56.3 10 10.4 23.0 43.6 15 15.8 15.1 28.7 20 21.2 11.3 21.4 30 31.5 7.59 14.4 40 42.2 5.66 10.7 50 52.7 4.54 8.61 75 1.2 2.95 5.58 100 l 104 2.30 4.36 150 1 61 1.48 2.82 200 213 1.13 2.13 300 320 0.75 1.41

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400 431 0.55 1.05 500 541 0.44 0.84 750 832 0.29 0.54 1000 1110 0.21 0.41 1500 1680 0.14 0.27 2000 2170 0.11 0.21 (I)

Intensity calculated from observed attenuation factors and frca unattenuated-bean measurements with a Model 70-5 Victoreen R-Meter on the beam axis at the reference plane and at the probe position 2-3/4" from the reference plane.

(11) The Cs-137 source wili be calculated annually to compensate for decay of the radioactive source.

10.0 Table 1035-1

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.a 1536 Revision 0 THREE ",!LE ISLA] I;T.'_ EAR STAI!O" U:'IT :-1 HEALTH PHiSICS FROCEDUiES r

k I27 Cs 50;rce (100 cCi) 1635 - Instrumtet C:i ncation. i th '. c.t:mn 64-/C4

~

FUR. 0SE 0

1.0 crocedure is to outline the steps to be taken The purpose of thi:

137 Cs Scurce for cali-for the proper use of the Vict rcan f?-754 bra tion.

2.0 DISCUSSIOt ra Survey Instrument Calicratic.. is a device for naking The Ga.

It

calibrations in radiation fields for 0.1 to 3000 rR/hr.

The unit ra-contains a non-rer..ovable Cs-137 sealed source.

diation output of a Cs-137 source is.32 P./hr per curie at a i

i The calibrator meets the requirements of distance of 1 meter.

the Atonic Frergy C.vmission =rd Agreement States.

(

It consists of heavy duty brass housing that hold 100 cCi of 2.1 The brass Cs-137 en:apsulated at one end cf a control rod.

housing is filled with appr0ximately 48 lbs. of lead tb provide the radioactive shielding recuired.

The Ganma Calibrator is a portable instrumect and requires a 2.3 The location for use should be selected mir.1cun of set-up.

An area carefurry to prevent accidental radiatiun exposure.

15 feet in front of the cone shculd be clear at all tires; this will al:o eliminc.te any appreciable scatter radiation.

stored cr excosed.

The source is kept in either := 2 posit.ic7s:

2.4 In the fully-shielded "storef',osition, radiation at the con-

~

tainer's surface is less than f 3 nR/hr; at 6 inches a',;2y it is 8 I U.

7

('

1.0 O

fp 96 20 r

12/1/73 1636 Revision 0 less then 13 mD./hr.

In the "e:: posed" position the source 1

(

faces a 450 port at the side of the shield, crd the ti ld can vary feca.0.1 to 3C00 rb/ar.

The source is r.oved from "stor d" to "expon i" csraly by raising the contr:l rod.

4 Included is a built in tctc reasure which helps to accurately 2.5 determine the distance frc: the Cs-137 source to the instru-ment being calibrated. To activate' the source, rerove the The padicc': and swir.g the grip-aandle on its pin hinge.

scurce cannot be raised unless the handle is swung a:ay.

The tir er on the gana calibrator is a safety device and can 2.6 also be used to set the length of time that the source remains in the exposed position.

Uhen the source is raised, the timer cust be set to a tire ben.aan one and sixty minutes or the If

([

source v:ill autc :ticclly decp back to the safe p6hitiuh.

the timer is set with the source raised, the source will remain in the exposec position for the time period selected and then Toreturnthesourcetoth$ safe dren to the safe position.

storaca position before the end cf a ore-set time cycle, turn the knob to "zero".

The source automatically drops into safe storage.

tine For mo:nentary exncsures of 1-ss than cae minute, keep _tn.::

2.7 at zero cnd lif t the scurce landle.

In this mode ib': source will autocatically drop into thc scfe position when the handle is rel ea sed.

This feature offcrs t'.:o adv s.: cts:

1.

The s'ourt: cannot be lef t accicenully i: the ex::osed casition for a period '.onger tb :n tho

(.

time selected wnen it is raiced.

2.0

i 22/1/73 le36 Ravisicn 0 2.

Tne timu can be used for the automatic control of expost he ti J.c and can 'ce uscd for a c;r.vc'.ient creset ti e' feature for calibratirig dosirt tr/

equipment 2.8 In order to assure cpar cali'cration the source must oe-activity calculated yearly. The follo. ring forcula is used.

- AT -

A = n. e o

i 2.8.1 Exc ple:

$0urce date 4-6-73 Present date 6-19-73 5

Difference 74 days or 0.2 years Original source strencth 100 mci Half life 30 years

(

A = A e-tT g

= A g e693t o

-81/2 393 x 0.2

!!here: A=.693

= (100 mci)

(e-30

)

Half life' H

.004S t = time fraa original

= (100 tCi)

'e

)

source strength

= (100 mci)

(.9952)

T]f 2 = half life of radic-activa source f

i

= 99.5 :e:i

3.0 REFERENCES

3.1 Ga=.a Survey Instruemnt Calibrator 64-754 Manual H.P.irccedure 17E. Op3ratien cnd Calib. > tion cf ES '-3 H.?.rrc:edure 1751 Or, era tic.n 1.,d Calibec tion of T.523 1

H.P.Procedtrc 1755 Operaticr. and Cali'. c.cion of P.ccector II2 r

3.0 96 266

12/1/73 Rev sion 0 3

1636 4.0 EQUI?".i::T Ga: :. Survey Instrex-nt Calibra or 60-764 4.1 low range survey instrt. rents Inst.rur 2nt(s) to be calibrated:

4.2 E52G, G3:1-5, Radecnr III 10.1 range

~ eg:

~

OPE.ETI::3 INSTP.UCTIOUS' 5.0 Take~ instrer.ent(s) to be calibrated to the Heat Exchanger 5.0.1 Vaul t.

Place the Radiation /,rea, Autacrized Personnel Only sign 5.0.2 on thE door to the heat exchar.ger vault.

Lock the door and infern the Control Roca that you are goi 5.0.3

, to calibrate instruments.

librator on l Unlock the source cage and place the 64-764 ca 5.0.4 I

the table.

Unlock the calibrator.

(

S.0.5 Select the instrument to be calibrated and place it at the 5.0.6 (see Table 1636-i).

distance for the selected expcsure.

f Exposure rates listed in this Table were prepared on 5 73 137Cs source decays end, there-These values will vary as the fore, must be corrected for accurate determination yearly.

Move the t;..er for a selected period of ti. e and expose the m

5.0.7 source.

If the instrument does not read correctly adjust prc;er ca 5.0.8 This is bration pots listed in referenced H.P. Procedures.

done en each rang: of the in nrecenc.

Secure the calib'rator and place in the Scurce Cage.

5.0.9 Calibratino RM-L1 usir.c the Fa 76a Calibrator.

5.1

(

4.0 (16 267

_/1/73 Revision C 1636 T.ed i e-i cn '..brk Permi t To use 65-764 in this calibration :

T' 5.1.1 L

r ::t te iw:ci.

"Ther2 is a art in thf front o~ P"-L1 to insert the source.

5.1.2 Ci :ck r:. :'i.'.; and adjus t. cs ;:er 5? 1302-3.1 5.1.3 A diagrce of the 64-764 calicratcr is given in. igure 1635-1.

5.2 The follo. ting example tecle is used for calculating d:se rates 5.3 using the formula:

R1=R3 (Dg[

(D )I

'n'here R1 = unkn:r.-;n d0se rate 2 = source strer.gth corrected for decay in Mr/hr.

R D2 = distance that R2 was calculated for D1 = new distance Te!;1e 1636-1 b'

41 cm - 196 mR/hr 22 cm - 0.63 R/hr 3.5 cm = 27.05 R/hr 42 cm - 187 mR/hr 23 cm - 0.62 R/hr 4 cm = 20.525 R/hr 43 cm'- 179 cR/hr 24 cm - 0.57 R/hr 5 cm - l'.2 R/hr 44 cm - 171 mR/hr 25 cm - 0.53 R/h' 6 cm = 9.17 R/hr 45 cm = 163 mR/hr 26 cm = 0.49 o/hr 7 cm = 6.73 R/hr 46 cm = 156 tR/h.-

17 c:., = 0.453 1/hr S cm.= 5.15 R/hr 47 cm = 149 mR/hr 25 cm = 0.421 R/hr 9 cm = 4.07 R/hr 4S cn = 7c3 cR/hr 29 cm = 0.39 R./>r 10 cm = 3.3 R/hr 49 ca - 137 mR/hr 3C cm = 0.257 R/5r i i cm = 2. 73 R.'hr 31 ca = 0.343 P'cr 50 ca = 132 mR/hr/n.-

r : r. s ~ <

12 cm = 2.29 R/n" 51 cm = 127 mR/hr 32 cn = 0.322 0'hr 13 cm = 1.05 R/hr 5.0

(

o/0 Q bod

12/1/ ~i3 1635 Rev i r. ic.n 0 Tcale 1635-1 (ccet.),

52 cm = 1:2 :Gc -

33 cm = 0.3'3 R/hc k/

14 cm = 1.62 R/hr 531:m = 118 mR/hr

15. cm. - 1.47' R/hr 34 cn = 0.225 R/hr 54 cn = 113 mR/hr

~

IG cr. = 1.29 R/iir

5 cm = 0.269 R/hr 55 cn = 109 rn/hr 17.c.,= 1.14.R/hr 36 ca =,? 255 R/hr 56 cm = 103 nR/hr 37 cm = 0.241 R/hr 18 cm = 1.02'R/hr 57 cm = 102 mR/hr 38 cm = 0.299 R/hr 19 cm = 0.91 R/hr 58 cm = 98 mR/hr 20 cc = 0.825 R/hr 39 cm = 0.217 R/hr 59 cm = 95 mR/hr 40 cn = 0.205 R/hr 21 cm = 0.75 R/hr 350 cn = 2.7 mR/hr 60 cm = 92 mR/i.e 375 cm = 2.3 mR/hr.

65 cm = 7d thR/hr 400 cm = 2.1mR/5e.

70 cm = 67 mR/hr 450 cm = 1.6 mR/hr 75 cm = 59 mR/hr

{~

S0 cm = 52 mR/hr 50 cm = 1.3 mR/hr 85 cn = 46 mR/hr 550 cm = 1.1 mR/br 600 cm = 0.9 mR/hr 90 cm = 41 mR/hr 650 ca = 0.8 nR/hr 95 cm = 37 mR/hr 8 mR/hr 700 cm = 0.7 mR/hr 100 cm = )33 A 750 cm = 0.6 cR/hr 110 cm = 27 mR/hr 800 cm = 0.5 nR/hr 120 cm = 23 mR/hr l

900 cm = 0.4 mR/hr 130 cm = 20 mR/hr 1000 cm = 0.3 n2/hr 140 cr = 17 mR/hr 1250 cm = 0.2 mR/hr 150 cm = 15 mR/hr 1500 cm = 0.1 mR/hr 160 cm = 13 mR/hr 170 cr = 11 mR/hr l

180 cm = 10 mR/5-t

(

190 cm = 9 mR/hr C)6 2b9 6.0

\\

12/1/73 1026 F.c.' i s i o n 0 Ta bj.'

16.'< 6 - ? ( c c. '.. )

3 -P,/hr 203 cT.

{

210 cm = 7.5 m9/hr 220'c = 6.8 tR/hr 230 cm = 6.2 mR/hr 40 cm = 5.7 mR/hr 50 cm = 5.3 mR/hr 75 cm = 4.4 mR/hr 00 cm = 3.7 n.R/hr 25 cm = 3.1 mR/hr Source strength cust be cc:puted annually and a new base line 5.3.1

' dose rate calculated.

I I

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t Revision 1

~

1749 04/22/76 THREE MILE ISLAND NUCLEAR STATION C 0 X__R0__E u C 0 A HEALTH PHYSICS PROCEDURE 1749 STATION PORTABLE / LAB INSTRUMENT CALIBRATION Table of Effective Pages Revisior.

Pace Date Revision Date Pace Revision 51.0 Date Pace 26.0 52.0 1

1.0 04/22/76 27.0 53.0 1

2.0 04/22/76 28.0 54.0 1

3.0 04/22/76 29.0 55.0 1

4.0 04/22/76 30.0 56.0 1

5.0 04/22/76 31.0 57.0 6.0 32.0 58.0 7.0 33.0 59.0 8.0 34.0 60.0 35.0 61.0 9.0 10.0 36.0 62.0 11.0 37.0 63.0 12.0 38.0 64.0 13.0 39.0 65.0

[

46.0 66.0 14.0 15.0 41.0 67.0 16.0 42.0 68.0

< -17.0 43.0 69.0

(

8.0 44.0 70.0

19.0 45.0 71.0 20.0 46.0 72.0 21.0 47.0 73.0 22.0 48.0 74.0 23.0 49.0 75.0 24.0 50.0 25.0 Unit 2 Staff RecornmendI Approval Unit 1 Staff Recommends Approval

_ D ate._

0 Approval _

_ Date CogrfzarQeft. Head Approval b Q tagnizant Dept. Heaf

/

/)

ecommends Approval Unit 2 PORC

-Unit 1 PORC Rec mmends/Apprdval I _ D ate _

Date __

Chairman of F08C Chairrmnof FORC i

}

/ \\/7/

I~

inc!uded PORC comments of Ni

_ included (dats) j PORC comments 'af _

J (date 1

_ D at e.____.

i t

Date _

By _

)

\\

By _

D a te ___'.

Approva! _

Stanon Sc;rintenden;i/

l' Date Approval Unit Su;:er.ntendent Mar. 0;ersx na;

1749 Revision 1 04/22/76 THREE MILE ISLAND NUCLEAR STATION STATION HEALTH PHYSICS PROCEDURE -

i Portable / Lab Instrument Calibration Schedu up a schedule for Calibration 1.0 PURPOSE The purpose of this procedure is to su of Health Physics Portable / Lab Instruments.

h ll be calibrated on DISCUSSION 2.0 All instruments pertaining to Health Physics s a a regularly scheduled interval.

3.0 REFERENCES

Eberline E-520 Manual 3.1 Eberline PAC-45 Manual 3.2 Eberline Teletector ifanual 3.3 Victoreen Radector III Manual 3.4 Eberline PNC-4 flanual 3.5 Eberline PNR 4 Manual 3.6 Johnson GSM-5 Manual 3.7 Eberline Rad Owl Manual 3.8 Eberline Hand and Foot Monitor f tanual 3.9 3.10 Eberline RM-14 Manual 3.11 Victoreen Vamp Manual 3.12 Beckman Wide Beta Manual l

3.13 Hewlett Packard 5201L Scaler-Timer Manua 3.14 Ludlum 2000 Manual Calibration 3.15 Health Physics Procedures for Instrument 3.16 Station Chemistry Procedure 1958 1.0

1749 Revision 1 04/22/76 4.0 EQUIPMENT Eberline PAC-45 Alpha Instrument 4.1 Eberline Hand and Foot Monitor 4.2 Eberline E-520 Instruments 4.3 Eberline PUC-4 Neutron Instrument 4.4 Eberline PNR 4 Neutron Instrument 4.5 Eberline RM-14 Instruments 4.6 Eberline Rad Owl 4.7 I

Eberline Teletector 6112 4.8 Johnson GSM-5 f

4.9 4.10 Dosimeter Charger 4.11 Victoreen Condenser R Meter 4.12 Eberline Portal Monitor 4.13 Victoreen Radector III Instruments 4.14 Victoreen Vamp 4.15 Hewlett Pac ard 520ll Scaler-Timers 4.15 Ludlum 2000 4.17 Battery Tester 4.18 Calibration Scurces I

4.19 Beckman Wide Beta 4.20 Portable Air Sampling Instrument OPERATING INSTRUCTIONS, instruments will be 5.0 The frequency of calibration of health physics Calibration dates will be loaged in the 6.1 as per Table 1749-1.

Health Physics Instrumentation Log Book.

d with pulse Records of instruments which are calibrate intained by NOTE:

gener'ators by the I&C Department shall be ma96 the I&C Department.

,n

1749

_____.1 Revision 1 0*/22/76 ce check as appropriate)

Instrument checks (battery check or sour Dates will be logged in t I

5.2 749-1.

will be performed as per Table 1 k

Health Physics Instrumentation Log Boo.

tions will have the i

Instruments requiring efficiency determ na All efficiencies e per week.

5.3 efficiencies calculatt.d as a minimum oncent Backaround and will be documented in the Lab Instrum the check and frequency Log Book.

Any instrument not satisfactorily meetingd in use until the 5.4 requirements above shall not be place d documented.

check or calibration is performed an o

. \\~

3.0

$7057 96 275

1749 r

Revision 1 04/22/76 TABLE 1749-1 d Calibration Schedule.

1 Health Physics Instrumentation Check an Calibration Check *

\\

Quarterly Instrument Monthly (1)

Quarterly Fberline Rad Owl - 1 Monthly (1)

Semi-Annually (4)

Eberline Rad Owl 2

Monthly (1)

Quarterly Eberline RM-14 Monthly (1)

Qvarterly Eberline E-520 Monthly (1)

Quarterly Eberline Teletector 6112

?!anthly (1)

Quarterly Eberline PfiC-4 Monthly (1)

Qua,-terly Eberline PtiR-4 Monthly (1)

Quarterly Eberline PAC-45 Monthly (1)

Quarterly Victoreen Vamp Monthly (1)

Annually (6)

Victoreen Radector III ft/A Semi-Annually (4)

Victoreen Ccndenser R Meter N/A (3)

Smi-Annually (4)

Ludlum 2000 N/A Sent-Annually (4'.

Ortec Scaler-Timer N/A Quarterly Hewlett-Packard S20ll Scaler Timer Monthly (1)

N/A (5)

Johnson GSM-5 N/A (3)

N/A (5)

Beck =an Wide-Beta II N/A (3)

Packard Liquid Scintillation Counter N/A (3) fl/A,

N/A PCC-11T Proportional Ccunter N/A (3)

Semi-Annually Geiger-ffueller Tube Counter N/A Semi-Annually Portable Air Samplers N/A N/A (7)

Pocket Dosimeters fl/A (7)

Seni-Annually Multi-Channal Analyzer 11eekly (2)

Seni-Annually Eberline Hand & Foot Monitor Weekly (2)

Eberline Portal Monitor f scheduling pericd for late date o

• All frequencies may be extended 12M o 96 276 he same criteria.

narfomed early by t 4.0

1749 Revision 1 04/22/76 fGTES TO TABLE 1749-1 (1)

Battery Check.

(2)

Source Check.

Efficiency calculated once per week minimua.

(3)

Calibration performed by I&C Department.

(4)

Twice per year preventative maintenance performed by r:anufa (5) service representative under service contract.

I Calibration performed by manufacturer.

(6)

See CP 1958 for calibration requirements.

(7) i B

I 5.0

(

96 277

'~

4

2/?./74 gi a

~

W

"~

CONTROLLED C0rt TF.~2."If,~

~3L.,.;]

. T,lAR aiATIO1.

1731 hC/.Lii. PPTSIC's Fi'3C!1.2

,.:IT :)

ratica and Calibration of TJ>erline E-523 Geiger Counter C u.

Table af Ef:e:ti',e Revision Pace Date Revision _

Pace Tla te_

Rev _i s i e-Noe Date 51.0 2/8/74 0

26.0 52.0 1.0 2/8/74 0

27.0 53.0 2.0 2/8/74 0

28.0 54.0 3.0 2/8/74 0

29.0 55.0 4.0 30.0 56.0 5.0 31.0 57.0 6.0 32.0 58.0 7.0 33.0 59.0 8.0 34.0 60.0 9,0 10.0 35.0 61.0 36.0 62.0 11.0 37.0 63.0 12.0 38.0 64.0 13.0 39.0 65.0 14.0 40.0 66.0 15.0 41.0 67.0 16.0 42.0 68.0 17.0 43.0 69.0 1

44.0 70.0 1 s.O 45.0 71.0 20.0 46.0 72.0 21.0 47.0 73.0 22.0 48.0 74.0 23.0 49.0 75.0 24.0 50.0 25.0 N

c-

_Date [ 7d&'

Plant Staff Reco nends Approval

/

C@iz.a L'ap.-:e:c S f 7/

Date Approval S h on superinten:en:/

~

7

/

ssist. Superintendent Date PCF.C Pece:. mends Approval cnairnan of RiC Date Approval _ Sta:icr, y;perintencent/

Assist. Superintendent T

pop,C c0 m ents cf 4

g. -

datE s.

C)h CTte hs8

2/8/74 Revisien 0 1751 THREE MILE ISLAND NUCLEAR STATION HEALTH PHYSICS PROCEDURE Operation and Calibration of Eberline E-520 Geiger Counter PURPOSE d

1.0 The purpose of this procedure is to explain in detail the op calibration of E-520 Geiger counter.

2.0 DISCUSSION The E-520 Geiger counter is a portable, battery operate 2.1 It for the detection and measurement of gamma and beta rad Two Geiger tubes are

' is' calibrated to read gamma fields in mR/hr.

A small used to cover the range of detection of the instrument.

0 0-2 l

internal tube is used on the highest range 0-2 R/hr 20 i

l and 0.2 mR/hr use the externally mounted Geiger tube whi tive to both gamma and beta.

i l

(

When the gas in the Geiger tube is ionized by radiation, an 2.2 l

pulse is created which is amplified, shaped and conve of current which is used to drive the meter.

The controls and connections are described in Se 2.3

3.0 REFERENCES

Eberline E-520 Technical Manual.

3.1 Minipulser Technical Manual 3.2 4.0 EQUIPMENT Eberline E-520 Geiger Counter 4.1 Eberline Minipulser Model MP-1.

4.2 137 Co Gamma Source 4.3 Cs or 1.0 96 279

2/S/7" Revision 0 1751 OPEPATII;G INSTP,UCTIO:15 5.0 Description of external controls and connections.

5.1 Seven position switch turns the instrument 0FF, check t 5.1.1 battery condition and selects scale multipliers of X100, X10, XI.0, X.1, and X.01, RESPONSE control pot that allows response time select 5.1.2 between 2 and 10 seconds.

RESET switch which rapidly brings the meter reading to ze 5.1.3 DETECTOR connector to the external probe.

5.1.4 PHONE connector allows connection to earphones or 5.1. 5 scaler.

Description of internal controls.

5.2 Five calibration controls, one for each range, which ind 5.2.1 dually calibrates that range to agree with the input puls

(-

rate.

s 5.3 Using the Instrument The meter should read Set the switch to the BATT position.

5.3.1 If not, change the batteries per the in the BATT OK region.

E-520 Technical Manual,Section IV A 1.

Set the switch to the range position appropriate to the I

5.3.2 field to be measured.

Read the meter and multiply the reading by the multipl 5.3.3 factor selected by the switch.

The The E-520 measures the field at the detector in u 5.3.4 internal detector is used on the X100 position.

I i

Turn meter off when not in use.

NOTE:

i 96 280057

\\.s.

2.0

2/0/74 Revision 0 1751 5.4 Calibration Remove case from E-520 by releasing end latches.

L' 5.4.1 E-520 contains internal High Voltage which is a CAUTI0ti:

potential hazard.

5.4.2 Set range switch to X100.

Expose internal detector to a 1.5 R/hr gamma field. Adjust X100 calibration contral for a meter reading of 15 (See Figure 1751-1).

5.4.3 Set range switch to X10.

Expose external detector to a Adjust X10 calibration control for 150 mR/hr gamma field.

a meter reading of 15 (See Figure 1751-1).

5.4.4 Set range switch to XI.

Expose external detector to a Adjust X1 calibration control for a 15 mR/hr garma field.

meter reading of 15 (See Figure 1751-1).

Expose external detector to a 1.5 mR/

5.4.5 Set range switch to X.1.

Adjust X.1 calibration control for a meter readin gamma field.

of 15 (See Figure 1751-1).

Expose external detector to a 0.15 5.4.5 Set range switch to X.01.

Adjust X.01 calibration control for a meter read-gamma field.

ing of 15 (See Figure 1751-1).

Place a Recheck all calibration points adjust as necessary.

5.4.7 calibration sticker on instruments, initial, date, and enter Record this information in the instrument ca due date.

book in the Health Physics Lab.

c)6 281 i

3.0

u J/ i-1751 Refision 0 L

4 C A L E R /,T I O!. C G :'.T i'. 0 L S

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THO.EE "I?.E ISU. D r;;CLUR STAT 10*.lMEALT U?HT *1 Operation.f. Calibration of Eberlina Revision Tnic of Effective Fa;Is Date Pace' Revision

,1

' Dati Pace Revision 51.0 Octe 52.0 Pace-26'.0 53.0 0

54.0 2/9/74 27.0' 1.0 0

2/9/74 28.0 55.0

. 2.0 0

2/9/74 29.0 56.0 3.0 0

2/9/74 30.0 57.0 4.0 31.0 58.0 5.0 32.0 6.0 59.0 33.0 60.0 7.0

?4.0 61.0 8.0 35.0 62.0 9.0 36.0

. 63.0

'l 10.0 37.0

'~

64.0.

11.0

, 38.0 65.6-t

~

12.0.

13.0

' 39.0:

66.0 40.0 67.0 14.0 ghk, i 41.0 as.a 15.0 42.0 69.~0 16.0 O

43.0 17.0 ;0 g1 70.0 44.0 19 t 71.0 lk.-

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Plant Staff Recc.. ends Approval Cogn Qant Dept. Head 0 ate M

[ 7

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t1 I*

Approval _S*.zticr. Su:arir.tendsn:/

Assist. Superintandent

/

I

/

- Date

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PORC Reccc:-ends Ap;reval Cnairman of PORC Date Appreval Station Sucerintercent/

Assist. Superintendent included.

g7UDl PORC corrents of

~firg hb ate By

2/9/74 Revision 0 1752 THREE MILE ISLAND NUCLEAR STATION

' HEALTH PHYSICS PROCEDURE

~

~

Operation and Calibration of Eberlin PAC-4S Portable A rURPOSE i

d

. 1.0 The purpose of this procedure is to explain in detail' the op calibration of the Eberline PAC-45.

2.0 DISCUSSION The PAC-45 is a portable, battery cperated instrument for t 2.1 The instrument detection and measurement of alpha radiation.

detector is a ZnS(Ag) scintillation phospor and photomult The entrance window

, tube contained in a _ light tight housing, is a thin layer of aluminized mylar, which,will pass. alpha i

cles yet block light.

The alpha activity is read out by the Eberline Lin-Log presen -

2.2 t

tation which eliminates scale. switching and multiplying fac 2

Four decades yet retains linear increments within each decade.

h are covered using two meter movements to yield a scale l imum readability

. of about 1.5 inches per decade, which give max i

Full scale readings of the four

. and ease of interpretation.

decades are 2K, 20K, 200K, and 2M counts per minute (

{

Calibration is such that the meter reads the respectively.

2 239Pu source, or 59 cm ed;aission rate of either a 1" diameter 239 u source.

P of a large uniformly distributed The instrument is powered by 5 "D" cells contained in an internal 2.3 The electronics are mounted on three plug-in boa battery pack.

for ease of maintenance.

I 96 2M L

1.0

2/9/74 Revision 0 1752

3.0 REFERENCES

Eberline PAC-4S Technical Manua s

~

3.1 Health P.1ysics Procedure 1749 3.2 MP-1 Technical, Manual 3.3 4.0, EQUIPMENT

..4.1 Eberline PAC-45 Alpha Calibration Source Set, Eberline S94-1.

4.2 Eberline MP-1 Mini-Pulser 60 4.3 field (137Cs or CO)

Gamma source to produce 50 mR/hr 4.4 4.5 ' Voltmeter s

~

5.0'.0PERATING INSTRUCTIONS-

~

5.1[ External Controls and C~onnectorsThr T

5.1.1 A spring r? turns the switch from. battery

' check position.

t C

check to the 03 position.

. to HV ADJUST controls the magnitude of high voltage a 5.1.2 Clockwise rctation increases the voltage.

the detector.

There are radial marks around the control for A PHONE connector for headset, speaker or externa

~

5.1.3 is provided.

A connector for the detector is provided on the instr 5.1.4 can.

5.2 Internal Controls There are four controls to adjust Calibraticn Centrols:

5.2.1 i

ource the meter reading to agree with the alpha calibrat on s A 20 turn control adjusts the input 5.2.2 Sensitivity Control-9h

.n5 0

sensitivity.

R-

2/9/74 Revision 0 1752 5.3 ~Using the Instrument The left Turn the switch to -the battery check position.

5.3.1 pointer (black) should read in the. green area.of the m k

Release the switch and it will return to the dial.

If the pointer reads below the green area of the position.

i meter dial, replace the, batteries as described in Sect on IV, A. 2 of the Tech Manual.

Merely read Reading the Lin-Log presentation is quite easy.

5.3.2 The black pointer is reac' up the pointer that is on-scale.

to 20 K CPM, above which it disappears from view and The fluctuation of the pointer is nar-red pointer is read.

i mal and is caused by the random nature of radioactive e Watch the pointer long enough to determine the aver d the de;.ectcc 1/4 inch

.o.a.i.rsemove me pi vuecove cover coc noi Contact with a surface is

[

from the surface being monitored.

more consistant, but this has the risk of puncturing or con taminating the face.

Turn instrument off when not in use.

NOTE:

5.4 Calibration Check to make sure that batteries are operable.

I 5.4.1 Remove plastic cover from detector, place instrum 5.4.2 If instrument does source which has a reading of 1310 CPM.

not indicate 1310 CPM, use set screw flo. R2 to rais the reading, clockwise to raise, counter-clockwise to Place instrument on No. 35 scurce which has a read 5.4.3 trument does not indicate 15,970 CPM, 15,970 CP 1.

If i i

3.0

~

C)() 2J

2/9/74

. Revision 0 1752 5.4.3 (con't).

dure as

. set screw fio. R3,to make adjustment using same proce

~'

\\

i You can go bac' to fio. 34 source and check reading.

above.

It may vary a little because R2 and R3. adjusting screws.

interacting.

8'00 Place instrument en fio. 36_ source which has a read 5.4.4 163,800 CPM, you can If instrument does not indicate CPM.

make adjustment the same way as in the beginning, exc Put instrument back en source fio. 35.

use set screw fio. R4.

To check instru.nent, it may take some fine adjustmen set screws R4 and R3 are interacting.

The source should givt a.

5. 4. 5' Place instrument ;on fio. 37 source.

If not, adjust screw flo. R5 as reading of 1,404,000 CPM.

To. check instrument, replace. probe-on source No

(

above.

R5 and R4 are

, It may take some fine adjustment because interacting.

Place calibration sticker on instrument with date, and n 5.4.6 Record information of person who calibrated the detector.

. in instrument calibration book in Health Physics Lab.

g6 38?uS7 4.0

a :-i s -

Revisi'n 0 THREE fi1LE ISL'C.D *;UCLEAr. STAT 10:1 iE/.LT:' = iSICS ??.CCEDU?I 1756 UtlIT #1 Operatica ar.d Calibration of

~( --

Eberline 6112 Telcrector.0se 8

7 2:e "e:cr Table of Effective Pages Ruvision_

N Ne Pace Date Revision Revision _

Pace Date 51.0 Pace Date 1.0 2/13/74 0

26.0 52.0 27.0 53.0 2.0 2/13/74 0

28.0 54.0 3.0 2/13/74 0

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4.0 2/13/74 30.0 56.0 5.0 31.0 ok E7.0 58.0 6.0 32.0 (Q

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50.0 25.0 Date M r' 4 /

Plant Staff Recc=. ends Approval ['

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Heac tignua t Dept.

2!/3!7[_

N L

_Date - '

Approval 5tation Superintencent/

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ssist. Superintendent

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- Oate _

7.C Recc= ends Approval Cnairr.an of PORC Data

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Approval Station Superintencent/

Assist. Superintendent

_ included.

c) LTate6 28 m

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FORC cc=.ents of

(

date By

\\

2/13/74

. Revision 0 1756 THREE MILE ISLAND NUCLEAR STATION

(

HEALTH PHYSICS PROCEDURE 1756 Operation and Calibration of Eberline 6112 Teletector Dose Rat PURPOSE 1.0 The purpose of this procedure is to explain in detail the o calibration of the 6112 Teletector.

2.0 DISCUSSION

'tery operated instrument for The 6112 Teletector is a portable, 2.1 The detecting the detection and measurement of gerns rields.

i i

elenants, two Geiger tubes, are located in the end of a telesc tube so that they may be extended up to 13 feet away from of the instrument.

The tiletector has fi.ve ranges of operation 0 to 2',

O to 50 mR/hr and, 2.2 e..-

The meter is equipped with a 0"to 2, O to 50, O to 100 R/hr.

(,

movable scale and when each range is selected, the scale for rangt appears in a window in the meter face.

2.3 'When the gas in the Geiger tube is ionized by radiation, an electrical pul:e is created which is amplified, shaped and con-verted to a pulse of current which is used to drive the meter.

I

3.0 REFERENCES

Servicing information for Teletector Model 6112.

3.1 4.0 EQUIPMENT Eberline Teletector Model 6112.

4.1 60 137Cs or Co gamma source 4.2 5.0 OPERATING INSTRUCTIONS I

Description of external controls and connectors.

5.1 Q() Tb0

,o/057 1.0

2/13/74 Revision 0 1756 Seven position switch turns the instrument 0FF, chec 5.1.1 batteries and selects the range of operation.

Earphone connector on side of instrument al~ows 5.1.2 to the earphone supplied with the Teletector.

Description of internal controls.

Control P1, used to set the operating point for the h 5.2 5.2.1 voltage supply oscillator.

Controls P2 and P6, used to calibrate the five range 5.2.2 operation.

i Control P7, located inside the probe; used to aid in 5.2.3 the 1000 R/hr range.

5.3 Using the instrument.

The meter should indiczte Set the switch to the B position.

.. '5.3.1 in the black area on the scale and meter light should

(.

If it does not, change the batteries located in the ha Refer to Teletector Tech Manual.

Set the switch to the range position appropriate to th 5.3.2 field to be measured.

Place the detector, located in the end of the telesc 5.3.3 position to take a measurement.

Read the meter directly in R/hr or mR/hr according 5.3.4 switch position.

5.4 Calibration Install four fresh "C" cell batteries, positive post in 5.4.1 first, in the handle of instrument, then place "0"

ring inside in groove.

96 290 t

2.0

2/13/74 Revision 0 1756 Before opening instrument case, -heck. all ranges in gam 5.4.2 fields to determine whether calibration adjustments are Check the 2 mR/hr range in a 1.5 mR/hr field, the necessary.

50 mR/hr range at 30 mR/hr, the 2 R/h-range at 1.5 R

~

~

h the 50 R/hr range at 30 R/hr and the~1000 R/hr rang (Gamma calibration source is locate

/

to'and 500 R/hr.

Heat Exchanger Vault.)

If the check of 5.4.2 snous calibration in necessary, 5.4.3 s

access to the calibration controls by removing the four s in the bottom of the case and lifting the top cover a Take care not to stress the interconnecting wircs to one side.

The

.-l Remove the rubber gasket from between the two case

~

I feali_bration pots are accessible between Refer to Teletector Servicing Information for 3

t.

'the top cover.

(

4

\\

identification of controls.

If the 1000 R/hr range requ'.res calibration, access to 5.4.4 Remove the located in the detector housing must be gained. Insert rubber tip and extend the probe about four inches.

i a screwdriver blade into the slot at the base of the ho P7 is the only pot in,the and unscrew the housing cover.

detector section.

Expose the Set the instrument switch to the 2 mR/hr range.

5.4.5 detector to a 1.5 mR/hr field and adjust P5 for a on the meter.

Expose the detector Set the switch to '.ne 50 mR/hr range.

5.4.6 ding.

to a 30 mR/hr field and adjust P4 for a 30 mR/hr rea 96 29 *t b

3.0

i 2/13/F Revision 0 1756 Expose the detector'to Set the switch to the 2 R/hr range.

1.5 reading.

5.4.7 i'

a 1.5 R/hr field and adjust P3, marked R29, for a

~

3 Expose the detector to a reading of.21 R/hr, ad I~ Recheck the 1.5 R/hr reading.

Expose the detector to Set the switch to the 1000 R/hr range.

t r section) 5.4.8 a 450 R/h'r field and adjust P7 (located in the detec o Expose the detector to a 46 R/hr for a reading of 450 R/hr.

Recheck the 450 R/hr field and i

field, adjust P2 as necessary.

The process is repeated until both adjust P7 as necessary.

points read correctly.

After performing step 5.4.8, set the switch to th I

Expose the detector to a 43.6 R/hr field and

,S.4.9 range.

Check lower scale reading by -

P6 for a 43.6.R/hr reading.

djust P6.

exposing the decector to a 4.36 R/hr.. reading,. a

(

Recheck the 43.6 R/hr reading.

the 5.4.10 Reassemble the irstrument taking care to p case gasket.

itial and date.

Place calibration sticker on the instrument, in in Health 5.5 Record this information in instrument calibra l

Physics Lab.

o7057 4.0

CONTROLLED COPV

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s +=

1762 THREE MILE ISLAND NUCLE AR STATION STATIO'l HEALTH PHYSICS PROCEDURE 1762 OPERATION AND CALIBRATION OF THE R0-2 Table of Effective Pages Revision Pace Date Rwision Pace Date Revision Pace Date 51.0 1

26.0 52.0 1.0 12/18/75 27.0 53.0 1

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__ Date % D S OtwhN

__ Date IS DC-C IC)'l3 Qcgnizant D ept. Head Approval Icognizant oept. Hea!

Unit 2 PORD RecoYnmends Approval

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Unit 1 PORC Rec 6mmendi App lroval

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_ _ D ate _

_ Date

-Thairman of PORC

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_ included Chairman cf F0RC l\\

PORC comments of PORC comments of _ \\ \\

I s included khte)

(dats)

_ Date.__ _

_ Date By _

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~ L $$ tion ip-n%ent"h.',[4 7 U hb

_Date Approval IJnit Supenntend Mgr.. O pe rational Ocality Ar.arance

Revis. a 1 12/18/75 THREE MILE ISLAND NUCLEAR STATION STATION HEALTH PHYSICS PROCEDURE 1762 OPERATION AND CALIBRATION OF THE R0-2 tion and 1.0 PURPOSEThe purpose of this procedure is to explain the opera 1.1 calibration of the R0-2.

instrument 2.0 DISCUSSION i

The R0-2 is a portable beta, gamma and X-Ray detect on is vented.to atmos-2.1 utilizing an air operated ion chamber which The effective center of the ion chamber is pheric pressure.

f the instrument case.

marked by dimples at the front and sides o nt which There is a arvable beta shield on the base of t the left side 2.2 is moved by depressing the friction release button on

(

of the case and manually moving the shield.

3.0 REFERENCES

Eberline R0-2 Tech Manual 3.1 H.P.P. 1635 3.2 3.3 H.P.P. 1636 3.4 H.P.P. 1602 4.0 EQUIPMENT 4.1 Eberline R0-2 High Range calibrator and associated equipment. --

4.2 Lcw Range calibrator.

4.3 Small screw driver.

4.4 96 290 OPERATING INSTRUCTIONS _

([-

5.0 Operational Check 5.1

.l 0

kevisica1

~

12/18/75 t ment, to Turn the function switch, located on the top of the ins ru In both cases the meter needle 5.1.1 N.s the Batt 1 then Batt 2 position.

face.

If it should indicate within the Batt range on the meter instruc-does not read in the Batt range refer to the instrument tion manual.

Ensure that the Turn the function switch to the zero position.

If it does not, rotate the zero knob until 5.1.2 meter reads zero.

the meter reads zero.

The zero setting of the instrument may be checked in an NOTE:

i radiation field by merely selecting the Zero, posit on.

r The Set the function switch to the desired range of cperation.

5.1. 3 switch position selected is the full scale reading of that range.

When selecting the most sensitive range (5mR/hr.)

!:0TE:

switching transient noise may cause a temporary de-This can be avoided by first flection of the meter.

selecting 50 mR/hr., letting the needle settle, and then switching to 5 mR/hr.

The instrument can now be considered operational and may 5.1. 4 I

now be used per H.P.P. 1602.

Calibration with a Gacra Source.

5.2 Ensure that a constant gecmetry is used throughout NOTE:

(i.e.

the calibration with the high range calibratcrin the the instrument is placed in the same position calibrator with the effective center of the ion chamber exposed to the source).

g6 295 Perform steps 5.1.1 and 5.1.3.

87G57 5.2.1

Revisica 1 12/18/75 1635 for a dose-P Set up the high range calibrator per H P..

4 scale on the 5000 5.2.2 rate of 4000 mR/hr. or approximately 3/

Set the function switch on the instrument mR/hr. range.

If adjustments are to 5000 and expose it to the source.

k d 5000 (located necessary, turn the calibration pot mar e ding is obtained.

on top of the R0-2) until the proper rea tion table Set up the low range calibrator, on the calibra Select a distance from the source that 5.2.3 per H.P.P. 1634'.'

roximately will produce a dose rate of 400 mR/hr. or app Set the function 3/4 scale on the 500 mR/hr. range.

it to the source.

switch on the instrument to 500 and expose i

ot marked If adjustments are necessary, turn the calibrat on p ading is 500 (located on' top of the R0-2) until the proper re obtained.

f rom the Using the low range calibrator, select a distance

/hr. or approxi-5.2.4 source that will produce a dose rate of 40 mR Set the function mately 3/4 scale on the 50 mR/hr. range. ~ it to the source.

switch on the instrument to 50 and expose ot marked i

If adjustments are necessary, turn the calibrat on p ding is 50 (located on top of the R0-2) until the proper rea obtained.

frca the Using the lcw range calibrator, select a distance

/hr. cr' approxi-5.2.5 source that will produce a dose rate of 4 mR

' Set the f unction

~

mately 3/4 scale on the 5 mR/hr. range.

the source.

switch on the instrument to 5 and expose it to t

If adjustments are necessary, turn the calibration po il the proper marked 5 (located on top of the R0-2) unt g6 [b reading is obtained.

3.0

Revision i 12/18/75 i

When the R0-2 is calibrated, place a calibration sti ker on 5.2.6 initials, date cafibrated, and the instrument including:

\\/

Record this informa-date that the next calibration is due.

i tion in the instrument log book, located in the Health Phys cs Lab.

5.3 peta Source Check Perform steps 5.1.1 through 5.1.3.

5.3.1 Set the function switch on the instrument to 500 and open the 5.3.2 sliding beta shield on the bottom of the case.

To open or close the beta shield, depress the friction NOTE:

release button on the it.'t side of the case and manually

'Jhen the move the slide, or let it fall due to gravity.

shield is open protect the thin face against damage by I

puncture.

Using the depleted Uranium source, (fiet-Ed #200) expose the 5.3.3 effective center of the ion chamber with the shield open on Note the meter reading.

contact with the source.

Close the shield and again using the depieted Uranium source 5.3.4 (Met-Ed #200), expose the effective center of the ion chambe

!;ote the with the shield closed on contact with the source.

meter reading.

Subtract the reading obtained in step 5.3.4, closed shield 5.3.5

'i reading, from the reading cbtair.ed in step 5.3.3, ccen shield reading.

Cetemine the beta correction f actor by dividing the number 5.3.6 (224 mR/hr. is the obtained in steo 5.3.5 into 224 mR/ hrs calibrated beta dose rate for the source.)

9 37057 4.0

~~

w,e 1, u l Revision 1 12/18/75 Record the beta correction factor on the side of the instru-5.3.7 ment.

.0 EXA?'PLE Beta Correction Factor Determination 6.1 105 mR/hr. = Contact reading with depleted uranium source (beta shield open).

35 mR/hr. = Contact reading with depleted uranium source (beta shield closed).

70 mR/hr. = Beta shield open reading minus the beta shield closed reading.

l 224 mR/hr. = Calibrated beta dose rate for the uranium source.

Beta Correction Factor = 105 mR/hr. - 35 mR/hr. = 70 mR/hr.

224 mR/hr.

= 3.2 70 mR/nr.

S 5.0

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