ML20095K801
| ML20095K801 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 08/17/1984 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| (RDC-110-(84)), NUDOCS 8408300054 | |
| Download: ML20095K801 (2) | |
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f TiiE CLEVELAND ELECTRIC ILLUMiNitilNG COMPANY P.O. box 5000 - CLEVELANo, OHlo 44101 - TELEPHONE (216) 622-9800 - ILLUMINATING BLOG. - 55 PUBLIC SQUARE l
Serving The Best Location in the Nation August 17, 1984 MURRAY R. EDELMAN y
VICE PRESIDENT NUCLEAR Mr. James G. Keppler Regional Administrator, Region III Office of Inspection and Enforcement
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U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 RE:
Perry Nuclear Power Plant Docket Nos. 50-440; 50-441 Instrumentation 2:1 Fillet Wolds
[RDC 110 (84)]
Dear Mr. Keppler:
This letter serves as an interim report pursuant to 10CFR50.55(e) concerning concave 2:1 unequal leg fillet welds installed in Unit #1 Reactor Building by our Instrumentation and Controls contractor, Johnson Controls, Inc.
Mr. R. Knop of your office was first notified on July 18, 1984, by Mr. E. Riley of The Cleveland Electric Illuminating Company that this problem was being evaluated per our Deviation Analysis Report 190.
This report contains a description of the deficiency, correc tive action taken to date, analysis of safety implication, and the planned date for our final report.
Description of the Deficiency Field inspection indicates that in some cases the 2:1 unequal leg fillet welds installed by Johnson Controls, Inc., (JCI) on 2", 3/4" and 1/2" instrument piping / tubing in Unit #1 Reactor Building (specifically inside Drywell and outside Drywell below the 620 ft. elevation) do not meet design requirements as specified on Gilbert / Commonwealth, Inc., (G/C Inc.) drawings.
Analysis of Safety Implication Based on G/C Inc. design, it can be postulated that the deficient wolds would result in an unacceptably high Stress Intensification Factor (SIF) at the transition from the toe of the wold to the pipe / tubing. The resulting overstress condition could potentially cause cracking at the too of the fillet weld and eventual failure of the safety-related Instrumentation and Control System.
8408300054 040817 PDR ADDCM 05000440 S
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' i -.* Mr. Jame3 G. K:pplcr 2'-
Augu2t 17, 1984 Corrective Action Taken to Date Indoctrination'and training was given to all Johnson Control (JCI) welders and QA/QC-personnel on the acceptance criteria for 2:1 unequal leg fillet _ welds.
-JCI QC'is reinspecting all installed 2:1 fillet welds and reporting the condi-tion (leg sizes,' actual profile) of'each we'd via Nonconformance Reports (NR).
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Engineering is evaluating the inspection results to determine which welds are nonconforming and will perform analysis of the pipe to determine. which nonconforming welds require rework. Upon_ completion of the analysis, the NRs will be dispositioned and all required rework will be performed.
Construction Quality Section is performing surveillance on new installations.
We expect to. complete the reinspection, analysis and rework by December 31,.
1984. Our final report will be submitted by January 11, 1985. Please call if there are any additional questions.
Sincerely, f$
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Murray R. Edelman Vice President Nuclear Group MRE:sr DW87/0/2
'cc:
Mr. J. A. Grobe USNRC, Site Office Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 l
U.S. Nuclear Regulatory Commission c/o Document Management Branch Washington, D.C.
20555.
Records Center, SEE-IN Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339
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