ML19310A634
| 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) | |
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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 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 H O = 1.3 psi 2
!!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:
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16 UtiC x 1-3/DBolt 4
.*--1/2" Stainless Will need to drill and' tap
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Steel Plate
% new hole - 1/2" deep.
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I 10" p-1 f
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D'. 6" 14" sN/
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- H Silicone
,'Ik3/4" Plywood
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ing C-D Grade
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3/8 - 16 UNC x 1-3/8")
Compound ('
Ext Glue
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(3/8 tapped hole in g(teel
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,'idunting inanipuTators) plate existing for-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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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
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3/3 Flat Washer
.812" OD
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3/4" rc.ce<
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i 5 Core Plywoo 7/16" 9 liole in Plywood 9
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 =
2
.368 Dearing Area in
. Area of hole in wood = *(*4375)2 =.150 in2 4
Per Mark's 11andbook, Pg 6-166, the allowable bearing stress for the plywood is 405 psi.
Fmax,,
pBearinD. Fmax =) 405 =368 in'-
A 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 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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Attachment y-
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Pace 3 of 3 14" Dia
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3/4" - 5 Core Plywood h bf.4#
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C-D Ext Glue
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Force at liaximum Distance from Centerline (Greatest pMax Bending Moment)
I Moending Itax = 1,875 psi per Itark's llandbook, Pg 6-166.
'T ending liax = 1,875 = h (Itark's, Pg 6-163) li = SF B
ilax K =.85 1875 =.8 F)
I rk FMax = 313 lbs (Bending ll)tothegrain=
Worst Case 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 I
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