ML19330C067
| ML19330C067 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 07/03/1980 |
| From: | Wuller G ILLINOIS POWER CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| IEB-80-08, U-0151, U-151, NUDOCS 8008070506 | |
| Download: ML19330C067 (2) | |
Text
gb U-0151
/LLINO/S POWER COMPANY
'l LO8-80(07-03)-0
July 3, 1980 Mr. James G. Keppler Director, Region III Office of Inspection & Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137
Dear Mr. Keppler:
Clinton Power Station Units 1 & 2 Docket No. 50-461 and 50-462 Construction Permit No. CP?R-137 & CPPR-138 This is in reply to your letter of April 9, 1980, whereby you forwarded IE Bulletin No. 80-08, dated April 7, which reported on code problems regarding examination of containment liner penetra-tion welds.
Illinois Power Company uses the flued head design for contain-ment penetration connections to the Main Steau, Feedwater and Residual Heat Removal systems for the Clinton Power Station.
The other penetration connections are of designs different from those depicted in Figure NE-ll20-1,Section III, Division 1, ASME B&PVC 1974 Issue, Summer 1975 Addenda.
As of July 2,1980, two main steam line connections have been made.
The specified radiographs were taken and indicate no defects requiring repair.
Welding is, and will continue to be performed to the 1974 Issue, Summer 1974-Addenda of the Code.
Radiography will continue to be performed for the remaining joints, to the requirements of NE-5000.
Backing rings will be used on the main steams penetrations only.
Other details requested by IE Bulletin 80-03 are given in the attached Table 1.
Sincerely, G. E..Wuller Supervisor - Licensing Generation Engineering Dept.
GEW/em Attachment USNRC Director, Division of Reactor - Construction Inspection
.cc:
H. H. Livermore, NRC Resident Inspector
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Table 1 Con _tainment Penetration Sleeve to. Flued Head Welds Penetra-Joint Penetra-Flued Head Size /
N.D.E.
3pe yj tion ht'l.
Material Thickness Required g., p em tion No.
Main Steam 1-MC-5,-6, (C)w/B.R.
SA 516 GR70 SA-350, GR.42/1.5 in.
RT -
-7,
& -8 LF 2 Fcedwater 1-MC-9 & -10 (C)w/o B.R.
SA 516 GR70 SA-350, GR-38/1--3/8 in. RT LF-1 Residual Heat 1-MC-14 (C)w/o B.R.
SA 516 GR70 SA-350 GR-34/1 in.
RT Removal LF 1
~
Residual Heat 1-NC-ll,-12, (C)w/o B.R.
SA 240 GR 304 SA-182 GR-34/b in.
RT R:moval
-13, -32 & -37 F316 1/ Fig. NE-1120-1 design types indicated. NOTE: The penetration sleeve to flued head
'- weld is made to the guard pipe in the case of the sain steam systen and to the proce::a piping of feedwater and residual heat removal systecs; w/B.R. - with Backing Ring; u/o B.R. without Backing Ring 2_/ Radiography e
m 4
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