ML20247G206

Discusses North Carolina TAR on Reviewing Application on Source Rack Proposed for Use in Mega Curie Pool Storage Irradiator

ML20247G206
Person / Time
Issue date:	05/10/1994
From:	Woodruff R NRC
To:	Lohaus P NRC OFFICE OF STATE PROGRAMS (OSP)
Shared Package
ML20247G185	List: ML20247G180 ML20247G206
References
SSD, NUDOCS 9805200165
Download: ML20247G206 (14)

Text

q '_

4(h &

'~

^

k Qv5 5 \\

O Och.

J\\

S b\\

May 10, 1994 b

MEMORANDUM FOR:

Pau

. Lohaus, Deputy Director h

Office of State Programs S'

l

,h gi FROM:

Richard L. Woodruff Regional State Agreements Officer

SUBJECT:

NORTH CAROLINA TECHNICAL ASSISTANCE REQUEST Ms. Robin Haden, North Carolina has requested technical assistance on reviewing an application on a " source rack" that is proposed for use in an "mega" curie, pool storage irradiator. The applicant is Process Technology.

Ms. Haden would specifically like to know the following:

e Minimum training required for design personnel?

NRC recommendation on the materials compatibility?

e e

Recommendations on the physical tolerances?

e Recommended testing?

The drawings that were provided to this Office are enclosed.

Please have someone provide comments as appropriate. Thanks!

~D c

$@ff

'\\C hw. s gwAe4%

A e w4 wLnh i

w j

@j 1

98 52 165 940705 SSD PDR l

l L

_i

t '_

s (a ch A h51 \\ h o

O%

J X

5 b

May 10, 1994

'\\

MEMORANDUM FOR:

Pau

. Lohaus, Deputy Director Office of State Programs

]

hg FROM:

Richard L. Woodruff Regional State Agreements Officer

SUBJECT:

NORTH CAROLINA TECHNICAL ASSISTANCE REQUEST l

Ms. Robin Haden, North Carolina has requested technical assistance on reviewing i

an application on a " source rack" that is proposed for use in an "mega" curie, i

pool storage irradiator. The applicant is Process Technology.

i Ms. Haden would specifically like to know the following:

o Minimum training required for design personnel?

e NRC recommendation on the materials compatibility?

e Recommendations on the physical tolerances?

e Recommended testing?

1 The drawings that were provided to this Office are enclosed.

Please have someone provide comments as appropriate. Thanksi J

C C

$Dff V

nqch 1 9eA b xNb

/

gw n%

6%

he,resgA l

C?

l 1

9805200165 940705 s0$

eon u-

Process Technology (NC) l Division' of' RTI, Inc PO BOE 757 1148 PORTER AVENUE BAN RIVER, NC 27258 GRABAM, NC 27253 (910) 578-5876 Fax (910) 578-5859 April 11, 1994 WO c.U/ tT, Ms.

J.

Robin Haden, Chief Radioactive Materials Section 1Jb Division of Rudiation Protection P.O. Box 27687 anuluntMic aw tit!g

Raleigh, N.C.

27611-7687 Re: Radioactive Material License Number 001-0701-1

Dear Ms. Haden,

RTI Inc, Process Technology of North Carolina requests approval to install a replacement source rack in its irradiator.

RTI Inc engaged Amershan International to advise us on methodology to improve the maximum / minimum adsorbed dose ratio of product.

They suggested that a reconfiguration of the source rack should result in a better ratio. It was recommended that a change from a 4 by 4 high module rack to a 4 by 5 high module rack would be more efficient.

RTI contracted with Mr. Tom Grubb of Machine Design & Fabrication, Inc of Apex, NC to design and build the new rack.

Drawings for the replacement rack were delivered to you on April 8, 1994.

Specifications for the source rack include:

All material to be 304 Stainless Steel.

All welds to be TIG using ER308L filler metal.

There are to be no burrs or sharp edges.

The unit to be built as per drawing.

The cable attachment eye bolt is to be rated at 2150 pounds or higher.

Prior to installation all welds will be checked by visual inspection.

l After installation and prior to loading radioactive material the source rack will be tested to assure:

Its proper movement in the system.

All safety devices operate as specified.

i

i A r$ view of radiological sefety factqrs shows that safety will be improved. The new rack will not have gny moving parts thus improving the safety factor.

There will be sufficient water shielding over the radioactive material when in the fully shielded position to assure that radiation readings at 30 cm over the edge of the pool will be below 2 mrem per hour.

After loading of the sources in the rack and prior to start up of operations the safe movement of the rack will be tested, all entry way safety interlocks will be tested and a complete facility radiation survey will be performed.

We expect to ingtall this rack in mid-1994. We will advise you of the exact dates at least 4 weeks in advance.

You expedient review will be appreciated.

Sincerely Yours, W/'

s Marcus V. Moore Radiation Safety Officer cc:

P.

Shapiro t

4 2

l l

[

}

1 l

I y

4 n

>s gyp:: pun:p quemmu ModuleImdag % see Motde L*= Guide

\\

.e, 1

1 Module Guide Rail eight used see q'

detaildrawing O

.)

Module Guide Pil U

Support five used a

..a:e.a

.:. ;;r-ty v

.

s.. u:. n... ;.

c1

s. -.

.m.

W wi;.% uw m: -

I.

..j

,..; ~,.>.,

w I

See welding specification drawing for j

c welding parameters I

a

-;f*

q

.*s.

+

v a

• y Q 2',. z.4 ouia.Ta.r= oei.cene, si,, 3,,,, m.,,,,

- - ~ ~

7

-.a.

h Ste m m al

/

1

\\

umac.m w =a hw point w......_E.

- - - - - -..m 1

i ANSTEc l

AVERTURn i

b CARD Al*o Avaitas;' *"

l A erture Carer

(

P

.._.___._._.___._-.--.m.--._-.--.-

r t

Machine Design & Fabrication,Inc.

Module Support Rack scale None one 22 Mar 94 Revision I 7805200/(o5 -

~

l,_

,.'f

-M.

O

.+.

)

1 a

sa st 3

t 1'l 1

(,*

i 4

1 h

- 18.230 -

- 18.098 j

1 i

i 4

1

-e f4 5

5

'snewepmwww memn l

1 1

i t

9 2

4 3

{

l

}

1s i

A) f 1

,1 3

1J 3',

q 5

t >

l 4

i i

O 4

n i

i a

i b

4 l

1 6: 7 ;;;.,.....::. v.:.w.s., -:r-t.;;

y,,,,.*

,..no. ' '.. p,3 g e.;,

r.*3+-

w;,

4 4

..=

unre.

.nm y-

~

n_

i

)

1

%sh....

2 3/4" thick at the deepest

/

• 9 1

I k

,*g %. g

+.J.-8 i,,,

g e

6 d

e.

e p

iY.

i sh i,.. " '.

+

1s{f','f -

y L

102.500

=

- 18.090 --- - 18.215 --- - 19.705

='

o ii 8n c

o n

8mn N.j g

$t ANSTEC APERTURE CARD n

Also Available on Aperture Card c

u li 66.500

=!

l Machine Design & Fabrication,Inc.

j Module Support Rack Dimensions i

scale None Date 22 Mar 94 Revision 1 9305200/(oS vA

m._.

t w

l f5 l

B B

l

/

T I

Sechon showing Module Guide Rail,

_..__..__..___..A Moduleloadrag Gade,and Module toca pot.

-B l

l l

j ANSTEC APERTURE CARD B

Also Available on Aperture Card C

I 17.500 i6 1

il 8 J"

j i

section showingModule Guide Rail l

and Moduleloading Guide i

i i

1 C

Machine Design & Fabrication,Inc.

Module Loading Guide Detail scale None Date 22 Mar 94 Revision 1 7805200/(o5-

e a

C F.

\\

\\.

t m

.u-C B

e.

2 A

p.4e?*,,_,,,v

\\

View f**

\\

4 3

l W

a 17.500 i

~

p 17.500 1

X

)

\\

View femWP 1

t

• ...,.*e'Y

};,

f f 'T 'c, ',^

' 't j,'}[?l ~; ~ ".,

u _. 3...

Ji[. lh;IO.W

,e 4

'k 2

' '. j

5. y ',

. ~. -

4 s,

j i*

! ' i-i i

~-

!' me 1

l rC i

i l

.,6m pnemmirmerm A - - -

--- -- -} - -

'C l

View from front l

3,.

b j

o i

-)

i 6----

17.500

='-

17.500 -

P----

17j j

iL i

l Portstramdulehthepsde i

I e'

l View from top

)

..c i

_b l

e

. +

i l

i i

I

- 4 i

\\

s e

,A d,

,,; e p.4 iy

. x-

i s;

3, B

\\

l rB

'e -

_4

/

t l

s I

seshowins oduieo idenaa, w

Module LoadmgGuide,and Module l __.. _.. _.

...A I

B l

I j

ANSTEC APERTURE f.

CARD B

Also Available on Aperture Card C

1

\\ -[

17.500 -- --I P

.i,B 7

J" L

seeso.showinsModuie cuide uma amd.i imaimo.ide Il I

i I,

4 i

I C

l Machine Design & Fabrication,Inc.

Module Loading Guide Detail scale None one 22 Mar 94 Revision 1 7805200/(of-TL

l

~

l Part Quanti l

Bottom Structural Member Upper Stiffener Plate 1

Main Support Tube 1

,,.,m."~

Lower Stiffener Plate 1

Eye Bolt Reinforcement Plate 1

Module Guide Rail 8

Side StructuralMember 2

o Guide Tube 2

Module Guide Rail Support 5

Module Loading Guide Ramp 2

Eye Bolt 1

,)

1;

• , ~ Y' * / "

.e

h*

94. :

il:.'.h ".[:' ; h,

55,

~o,

1

,+

/*,'

sy O ' '

1 I

1 i

ty Description l

l 2" X 7 ga 304 SS flat i

2" X 2" X 11 ga 304 SS tube 2" X 7 ga 304 SS falt 2" X 1/4" 304 SS flat L

Formed 14 ga 304 SS I

2" X 2" X 11 ga 304 SS tube ANSTEC l

APERTURE 1/2" sch 40 304 SS pipe CARD 1" X 1" X 3/16" 304 SS angle Also Available on l

^"""'. care 2" X 7 ga 304 SS flat 1/2" Eye Bolt 304 SS 1

i Machine Design & Fabrication,Inc.

Parts and Materialist scale None Dec 22 Mar 94 Revision I 9805200/6 s - 0 &

7 --

R 1

1 1

I i

[

l f

L d

a AssanblyofBodomStndralMtsober 1

1 1

1 1

1 Y':1**W:MS pjp:se:::ipp:p:Wi?:

I l

l i

l 1

i 1

l I

l 0.500" hole for

.)

Eyebolt J

]

't J

EyeBoltRainforcement 3

Plate 4

.-)

i.

w.s.:

.wc+. : ;, s+c. ; :- >,..

. s.

ws v

- ~

ry.:x. : a. e, '

t..v. -.

. v:

" :n-

-dO[s+7M,,:M:i: J.r.i:i;1.idiiVE5i' 1 f.-.$70 h

lower Stiffner Plate Upper StdenerPhe :

Main SwportTube 4

<-l Se:WeldiigSchedule for ggm l

y.% j....

6.708 4

e

=

i

't J.

j

-_)

-l.-..

1 Module Guide Rail ANSTEC APERTURE

~

y CARD Also Available on Aperture Card Section 0.875 i

O.625 x>

0.125 radius l

l 3

i Machine Design & Fabrication,Inc.

DetailDrawmg l

s~le None Dec 22 Mar 94 Revision I

\\

7805200Kos-05

\\

~-

1 j

1 ll t

j s

r 7

i ii

/

/

/

/'

/ ^

/^

=

j

\\ l4

/

~

/ 14 b

/

/

/

/'

/

/'

=

\\/

\\/

\\/

^

N N

N N 14 l

/ 14 k/

\\/

k/

N N

N i

s x

\\ l4 N

q N

/ 14 All welds to be TIG using ER308L filler metal.

l.

..u:As

., n w.7 i

/

/

l 14 /

,/

14 N

, tv

.e.

eewa l

/

{L,.;,.1WfL @;;f

^

.r.+

e. g c. g. g,

/

N

/

N N

14 /

[

1-6 \\

i

/

/

ANSTEC N

N N

APE RTURE CARD s

i.6 /

C

-_ N 14 N Also hvailable on k/

geiture Card 3

N N

N kj

/

X1 N

e naam.m-wa M

N N

Machine Design & Fabrication,Inc.

Weld Schedule scale None o ne 22 Mar 94 Revision 1 980 62 00/la V J

I From:

Thomas W. Rich (TWR)

To.

LAB Date:

Tuesday, July 5, 1994 10:14 am Subjects NC TECHNICAL ASSISTANCE REQUEST' Attached is our response to NC's TAR.

There was not enough information for us to specifically answer Ms.' Haden's request. The attachment references information that is required to perform the review and which upon review would address Ms. Haden's request (bullets 2,3, and 4 of Richard Woodruth's letter)

Bullet 1 of Dick's letter is unclear.

If they mean what training does RTI have to have in the way of engineering design, the answer is - no specific training is required.

'If you have any~ questions about this response please feel free to contact me.

CC:

PHL,SLB i

Files:~

C:\\sedtemp\\nctar, p.

i l

i

=

f d\\

• ' i Nirr z-

RESPONSE TO NORTH CAROLINA'S TECHNICAL ASSISTANCE REQUEST We have reviewed the package provided to Ms. Haden.

In order to review-the new source rack design and its acceptability for licensing, at a minimum, the design specifications of.the current system are required. These specifications are required in order to answer the following questions.

1) What are the dimensions (including tolerances) of the current rack system (i.e., modules, sources, rack, etc.)

2) How is the current rack system moved-from the shielded to the exposed position? What are the specifications (i.e.,

rated loads, torque, speed,' etc.) for the pneumatic cylinders, motors or other components that are used to move the source rack?

3) ? hat is the maximum weight of the current rack system?

4) What are the materials of construction of the current rack system and why were these materials chosen?

In addition, RTI needs to submit information regarding the following:

1) The new rack design may affect how the irradiator is licensed (i.e., source loading / unloading, maintenance and emergency procedures, increased radiation levels, etc.).

The applicant should submit any necessary information that may affect the current license.

2) Weight of the new rack design when fully loaded in the j

exposed position and shielded position. For the exposed

{

position, the weight should include the weight of any water I

that may be trapped (no drainage holes shown on rack).

I l

3) How is the eye bolt attached? Is the eye bolt welded to the rack?

4) Diameter of the source rack guide tubes.

j

5) Any prototype testing performed on the rack (i.e., drop

)

test, temperature test (warpage), etc.).

j i

I

_ _ - - _ _ _ _ _ _ _ _ - _ _ _ ~