ML20006B128
| ML20006B128 | |
| Person / Time | |
|---|---|
| Site: | 07109019 |
| Issue date: | 01/26/1990 |
| From: | Winslow T GENERAL ELECTRIC CO. |
| To: | Macdonald C NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| References | |
| NUDOCS 9001310471 | |
| Download: ML20006B128 (4) | |
Text
OAN 2 919g0 GE Nu7ca/Lsryy9 x.
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.,g Mr. Charles E. MacDonald, Chief R
i Transportation Branch t5 Division of Safeguards and Transportation
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U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
Request for " Letter Amendment" to NRC Certificate of Compliance USA /9019/AF for the BU-7 Shipping Package
Reference:
Telephone conversation between Mr. R. Foleck (GE) and Mr. E. Easton (NRC). 1/24/90
Dear Mr. MacDonald:
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General Electric's Nuclear Fuel and Components Manufacturing (NF&CM) hereby requests the NRC to issue a temporary letter i
amendment authorizing the use of an alternate specification for-the gasket material used on the BU-7 shipping container.
The gasket is used to seal the packaging's inner drum and is called out in GE's current licensing drawing 112D1592, Rev. 8.
This i
i request is being made due to the urgent need for gaskets to meet pending shipping schedules and due to the current lead time limitations to meet our scheduled shipments.
The duration for this letter amendment is requested to be from the NRC approval date until August 31, 1990, to allow:
(1)'immediate use of the alternate gasket material, and-(2) adequate time for submittal of a normal change request of current NRC Certificate
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9019 to include the requested silicone rubber specifications as an alternate gasket material.
The attached June 14, 1989, letter from Connecticut Hard Rubber.
l (CHR) states that the silicone rubber used to fabricate the l
gaskets we are presently using (ZZ-R-765, Class la or ib, Grade
- 50) is essentially the same as the proposed alternate (ZZ-R-765, Class 2a or 2b, Grade 50).
We are also providing a recent January-25, 1990, letter from Southern Rubber Company, Inc., that identifies the specific properties of the two material classes.
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The letter also states that CHR Industries' materials meet or-I exceed the specification.
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9001310471 900126 I
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Mr. Charles E. MacDonald l
January 26, 1990 Page'2 i
We regrest that this letter amendment be approved by mid-February since we will need to start using the new gaskets e" Ond the.first of March.
Pursuant to 10 CFR-170.31, a check for $150 is enclosed for this request.
If you have any questions or would like to discuss the matter further, please contact me on (919) 675-5461.
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Sincerely,
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GE NUCLEAR ENERGY M
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T. PrestonWinslow) Manager l
Licensing & Nuclear Materials Management-
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TPW-90-014 t
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% lndustrieS June 14, 1989 General Electric Company Mr. John tidak P.O. Box 780 Wilmington, North Carolina 28402 Dear Mr. tidak This is in response to our telephone conversation on June 9, 1989 regarding the basic differences between our silicone rubber sheet products 9051 and 9050.
It is my understanding that the gaskets currently produced from 9051 are being replaced on an annual basis and since that will be an ongoing requirement it makes sense to use a less costly silicone rubber.
The 9050 is an essentially equivalent product and in some instances a superior product.
CHR's 9050 and 9051 are both produced to meet Federal Specification EE-R-765, the 9050 to class 2a Grade 50 and the 9051 to class la Grade 50.
The primary difference is that 9051 has good flexibility at ultra low temperatures i.e. minus 130'P and the 9050 has superior high temperature resistance, having good stability at 500'F.
If I can be of any further assistance in supp)ying technical information on these or any other of CHR's silicone rubber products please don't hesitate to call.
Sincerely, CHR INDUSTRIES, IN$.
h YQ 99 rier Product Development Mgr., Rubber Products
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-J CHR Industries, Inc.,407 East St., P.O. Box 1911, New Haven, CT 06509/203-777 3631 j
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At.NOA 1ELECOPIER" 2 W ;
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.i SINCE 1925 SOUTHERN RUBBER COMPANY,INC.
Mechanical Rubber Parts - Packings Gaskets and Seals Rubber Clothlny and footwear - Molded Goods and Tubings u,aamm
'D" Rings Silicone, leflon. Viton and Plastics s.,e, v,.. s. v s v, w, 8OhUC0
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^nrum ao -itt ernout en sa nunde~nIs.Elioc is nu nutnson sinto-sor rue GREENSBORO, NORTH CAROLINA 27417 0039 q
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P. O. Box 2042 y
N h'llmington, NC 28402 Ow Attentiont Mr. John Jidak
Subject:
ZZ R-765C Specifiention llent John:
Per our conference telephone conversation of,lanunty 24, 1990 1 nm listing the two (2) miterlais in question.
22.R-765C Class 1A and IB is described as Low Temperature Re.
sistant. Class 2A and 28 is described as liigh Temperature Resistant. The Grade calls for Durometer.
The physical properties are ns follows:
Class 1A nnd 1B Class 2A and 2B nurom'.ter 50 I 5 5015 Tensile 700 P S.I. Min.
700 P.S.I. Min.
!!)ongrition 225% Min.
200% Min.
Compression Set 35% Max, 35% Max, O
liigh Temperature P.
+ 500 O.
500 "P.
P
+
O.
80 "P.
Low Temperaturo Brittle Pojnt
. 103 P
CllR Industries' Materini 9051 which is grey in color meets or exceeds the specifi-cation for Class IA and 18 CllR Industries' 14aterin! 9050 which is rust / red in color meets or exceeds the specifiention for Class 2A and 2B.
I will send a copy of the Specjfication ZZ R-765C Rev C via UPS Next Day Letter to you on Friday.
I hope this is the information you needed.
If I can be of further service please feel free to call.
Sinceroly, k..) p p...rl.
D. K. Tomlinson IIKT/rf d