ML18153A143
| ML18153A143 | |
| Person / Time | |
|---|---|
| Site: | Hatch, Indian Point, Surry, North Anna, Comanche Peak  |
| Issue date: | 06/10/1997 |
| From: | Johnston D CRAWFORD FITTING CO. |
| To: | NRC (Affiliation Not Assigned), NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| REF-PT21-97 NUDOCS 9706190168 | |
| Download: ML18153A143 (3) | |
Text
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CRAWFORD FITTING COMPANY SOLON, OHIO 44139 FRED A. LENNON CHAIRMAN Document Control Desk Office of Reactor Regulation Nuclear Regulatory Commission Washington, DC 20555 June 10, 1997
Subject:
Defects Potentially Reportable Under 10CFR21 Gentlemen:
PHONE (216) 248-4600 FAX (216) 349-5970 We are writing to inform you about a possible machining defect in certain stainless steel Swagelok tube fitting bodies.
A list containing the part number and the U.S. nuclear facilities to which the parts have been sold is enclosed. All of these facilities have already been notified by us about this possible problem.
It is only the body of the fitting bn an SS-1210-7-8 with the heat code HVM that is involved; the nut or ferrules are not affected.
The possible defect is an oversized bore on the body of the Swagelok tube fitting. A machining operation on the bore of this product was allowing cutting chips to sometimes accumulate on the tool, which caused it to cut oversized on some of the parts. The rate of incidence on the parts we have inspected from these orders is about 0.03%. Steps have been taken to remove cutting chips from accumulating on the tool.
We have also increased our sampling inspection size on this product.
A sales drawing for the referenced part number is included with this letter.
lf there are any questions, please do not hesitate to contact us.
Encl.
cc:
WRC EPM EDS Sincerely,
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- Pa~d ;<.lston * * * * *...
- Vice President & General Manager
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- 9706190168 97_0_6_1_0_ -------,
PDR ADOCK 05000280
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Virginia Power SS-1210-7-8 Surry Nuclear Station (5 pcs.)
P.O. BNT 471726 Rel 150 I.D. R16JP0503B Virginia Power SS-1210-7-8 Surry Station (3 pcs.)
P.O. BNT 471726 Rel 364 I.D. R16CC0518B Virginia Power SS-1210-7-8 North ANA (1 pc.)
P.O. BNT 471726 Rel 445 I.D. R16DG0518B Public Service Electric & Gas SS-1210-7-8 Hancocks Bridge (10 pcs.)
P.O. #824806 Rel. 127 I.D.R 162M0503B Texas Utilities
- SS-1210-7-8 Comanche Peak (5 pcs.)
P.O. B01844631 049 I.D. R16JP0503 Georgia Power SS-1210-7-8 Plant Hatch (4 pcs.)
P.O. 6027139000 I.D. R16DG0518B North Atlantic Energy Service SS-1210-7-8 P.O. 96909 (6 pcs.)
I.D. Rl6CC05i8B New York Power Authority SS-1210-7-8 Indian Point III (10 pcs.)
P.O. B95I9120 RLS 020 I.D. R16DG0518B Pacific Gas & Electric SS-1210-7-8 P.O. 089882 (8 pcs.)
I.D. R16DG0518B
ENG. DEPT.
JUN 61997
1.44 ----
1/2 NPT
- .86
.78
- .96 i----- 1.84 -----
- 1-1/8 NUT HEX
. 62 MIN. OPENING PART NO:
1210-7-8 3/ 4 TUBE 0.0.
3.ALL DIMENSIONS ARE IN INCHES FOR REFERENCE ONLY AND SUBJECT TO CHANGE.
2.** ARE TYPICAL FINGER-TIGHT DIMENSIONS.
SUPERSEDES NOTES: 1.* DIMENSIONS ARE ACROSS HEX FLATS.
DATE PREPARED BY APPROVED BY PO
~ -~-'i? CRAWFORD FITTING CO.
CLEVELAND, OHIO 1210-7-8
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