ML19310A634

Responds to NRC 791210 Request by Providing Confirmation That Manipulator Sleeve Parts & Other Similar Openings Were Sealed on 800103.Action Provides Addl Protection Against Potential Tornados

ML19310A634
Person / Time
Site:	West Valley Demonstration Project
Issue date:	03/14/1980
From:	Clark J NUCLEAR FUEL SERVICES, INC.
To:	NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
References
15819, NUDOCS 8006200579
Download: ML19310A634 (4)

Text

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C Nuclear Fuel Services, Inc. 6000 Executive Boulevard. Suite 600. Reckville. Marylan:

• 2CS52 MPS A Subsidiary of Getty Oil Company (301' 770-5510 ,

3 CI 3

,:C" March 14,1980 50-201 Director Office of Nuclear Material Safety and Safeguards U. S. Nuclear Regulatory Commission Washington, D. C. 20555

Reference:

NRC Memorandum, " Meeting With Nuclear Fuel Services, Inc.

(NFS) on Effect of Tornado on Dormant Plant at West Valley, New York " December .9,1979

Dear Sir:

At a meeting on December 10, 1979, members of the Advanced Fuel and Spent Fuel Licensing Branch requested that NFS provide some additional protection against a potential tornado at the reprocessing plant in West Valley, New York. Specifically, manipulator sleeve ports and other simi-lar openings were to be sealed. This letter confirms that such openings were sealed on January 3,1980 in accordance with the attachment.

y truly yours James . Cla Manager, Quality Assurance and Licensing

. JRC:jnw Enclosure cc: T. K. DeBoer ,

New York State ERDA ,  !

1

. I FEE EXEMPT

'r 8006200579 15S19

• Page 1 c' 3 ATTACl;!!E!!T SEALIllG t1ANIPULATOR PORTS IN GPC AtlD P!!C 4

. Given AP = 36 inches H2 O = 1.3 psi

.  !!anipulator ports have an hD = 10" (78.5 in2)  ;

- Any cover over the port would have to withstand a pressure of 102 lbs

. The following is a sketch of a typical manipulator port and the suggested method c# sealing the port:

' s ~. 16 UtiC x 1-3/DBolt 4 .*--1/2" Stainless Will need to drill and' tap I

's . Steel Plate  % new hole - 1/2" deep. '3 l

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p- I 10" 4o f 1

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6" 14" s /

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• H ;i ' , ,2)

Silicone -

. ,'Ik3/4" Plywood /

ing > '. C-D Grade \

Rubber 3/8 - 16 UNC x 1-3/8")

CompoundSeal,GE (' RTV") -

- Ext Glue \

'? * (3/8 tapped hole in g(teel

.,%._ plate existing for-

-- . ,'idunting inanipuTators)

NOTE: On ports that have electrical lines or hoses through them into the cell, the plywood will be slotted and the lines will be scaled with GE RTV.

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W, - %r 2 v wpe' w'r.- e m.

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• Attachment Page 2 of 3 hio areas to look at for possible failure: *

1. Bolts pulling through plywood, breaking the RTV seal.

2. Plywood bending and breaking the RTV seal.

3/8 Bolt h ~

/

3/3 Flat Washer .812" OD WHA (!/O -

f U;-.... ~ ,7.C

~~~~ "~

3/4" rc.ce< v c . .x < a 4 . -- - - . _ . .. .

i 5 Core Plywoo 9 7/16" 9 liole in Plywood C-D Ext Glue 51f (Force due to Pressure on Plywood from AP) i Bearing area of flat washer'on the plywood.

. Area of washer = w(.4375)2 = .150 in2 .518 .150 =

.368 Dearing Area in 2

. Area of hole in wood = *(*4375)2 4

= .150 in2 Per Mark's 11andbook, Pg 6-166, the allowable bearing stress for the plywood is 405 psi.

Fmax ,, l pBearinD . Fmax

. A =) 405 =368 in'-

I Fmax = 149 lbs

.. Since a force of 51 lbs is exerted on each bolt due to the differential pressure between the cell and operating aisle and that the maximum allowable l force that could be, exerted on each bolt and not crush the plywood is 149 lbs,  !

the above design is satisfactory.

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- ~ , ~. -- +- . -.. _ _. .,m , _ . ._

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- Attachment y- ) Pace 3 of 3 14" Dia

@ \  % .s t

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-t-5= 3/4" - 5 Core Plywood

-@i j C-D Ext Glue h bf.4#

. .- ..-8..c7

. ___.mW n - 1 Force at liaximum Distance p from Centerline (Greatest Max Bending Moment)

I Moending Itax = 1,875 psi per Itark's llandbook, Pg 6-166.

'T Bending liax = 1,875 = h (Itark's, Pg 6-163) li = SFilax K = .85 1875 = .8 F) ,

, , I rk FMax = 313 lbs (Bending Worst Case ll)tothegrain=

The plywood is capable of withstanding a concentrated load of 313 lbs. The total uniformly distributed load over the plyuood is only 102 lbs. Therefore, he plyunod will not bend and break the RTV seal.

15S19

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