ML20040H516
| ML20040H516 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 12/22/1981 |
| From: | Swidersky M ATLAS COPCO TURBONETICS, INC. |
| To: | Kiessel R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| NUDOCS 8202180331 | |
| Download: ML20040H516 (2) | |
Text
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.q Atlas Copco Turbonctics Inc.
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" W 20 School Road w
Voorheesville, N.Y. 12186 (518)765-3344 E
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.Q December 22, 1981
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Director
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Office of Inspection and Enforc ment U.S. Nuclear Regulatory Ccuraission Washington, D.C.
20555 gggg Attention: Mr. Rich er
Reference:
A.C.T. S.O. 9875-22020/23 Bechtel: Purchase Specification 9645-M-050.1 File:
0266/M-050.1/0498 VB-81/0603 Grand Gulf Nuclear Station
Subject:
Tefcon Coating on the Shell I.D. of the Aftercooler.
A.C.T. Drawing 804 090 001 Lytron Drawing No. C/5921 h./[D[(
Bechtel Part Identification Q2EGlB001A & B Gentimen:
This is to confirm the information provided to Mr. Richard Kissie frcm the Inspection and Enforcement Office of the N.R.C. in Washin n D.C.
via telephone conversation on Decemoer 2, 1981.
1.
The aftercooler is used to lower the gas discharge temperature of the drywell purge cmpressor, and was supplied by Atlas Copco Turbonetics Inc. for installation in the piping system by Bechtel Corporation.
2.1 The cooler was constructed by the Lytron Inc. in Wobnin, Mass.
under the contract to A.C.T. in ocmpliance with the requirements of the Design Specification 9645-M-050.1.
2.2 This was standard Lytron cooler design, upgraded according to N.R.C. Reg. Guide 1.26 Quality "B".
2.3 As part of Lytron's Standard Design P M ure, Lytron Inc. applied
.001
.002 thick teflon coating to the I.D. of the shell, to facilitate initial assembly of the tube core and prevent deposits (frcm brackish cooling water) adhering to the shell I.D. during testing period.
2.4 Destruction of this teflon film during the scheduled design life time, will noteffect the cooling efficiency nor the operability of the cooler during IOCA condition due to insignificant amounts of teflon material in relation to the size of the baffel clearances and tube spacing.
8202180331 011222 DR ADOCK 05000416 PDR 16-%1 p
Dede & r 22, 1981 nge 2 '
- Atlas Copco Turbonetics Inc.
JItlas Chpco m
3.1 During the cooler shell nodification,perforned on two shells, out of four total, regtureing inlet and discharge nozzle rein-forement, teflon coating was renoved, authorized by Bechtel SDDR No. M-050.1-006 dated 8-26-1981. Two cooler shell.3, with-out teflon coating were returned to Grand Gulf site for instal-lation into the piping system.
3.2 Two ranaining cooler shells should be returned to A.C.T. for canpletion of nozzle reinforement modifications, at this time teflon coating will be renoved in compliance with Bechtel authorization.
4.0 Four aftercoolers of this particular design are used with the purge canpressors on the Grand Gulf project only.
Sincerely, 9
Myron Swidersky Senior Project Engineer MS. "
cc:
H. Pennink J. Leranain K. Rochow M. Smith K. Streifert R. S. Trickovic, Bechtel Co.
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