ML20072B088
| ML20072B088 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 05/31/1983 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20072B084 | List: |
| References | |
| NUDOCS 8306130305 | |
| Download: ML20072B088 (2) | |
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PO. Box 5000 -
CLE'.' ELAND OHIO 44101 - TELEPHONE (216) 622-9800 - ILLUMINATING BLOG - $5 PUBLICSOUARE tI
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1 Serving The Best Location in the Nation MURRAY R. EDELMAN vice enEsIDENT May 31, 1983 NUC LE A R Mr. James G. Keppler Regional Administrator, Region III Of fice of Inspe: tion and Enforcement U.S. Nuclear Regula tory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 RE:
Perry Nuclear Power Plant Docket Nos. 50-440; 50-441 Suppression Pool Stainless Steel Cladding Sensitization [RDC 19(80)]
Dear Mr. Keppler:
This letter is written to amend the final report on the suppression pool issue to be in ac:'ordance with the plan of action discussed with Mr. Ray Cilimberg of NRC Region III during his March 14-15, 1983, inspection. The plan of action detailed here outlines the monitoring prcgram and proposed corrective action to be taken should crevice corrosion occur in the cladding fissures adjacent to weld seams in the Perry suppression pools.
The monitoring program will consist of the following phases:
1.
Periodic visual examination of the Suppression Pool welds will be performed f rom the elevation 599'9" platform.
If corrosion effects are observed either directly or through the other phases of the monitoring program, additional visual inspection will be performed by using an underwater TV camera or boroscope to further assess the condition.
2.
Surveillance specimens of preconditioned 304 clad carbon steel plate will be installed in the pool.
3.
Electrochemical potential monitoring of the fissured heat af fected zones of select pool welds will be performed.
In the unlikely event corrosion notch progression is noted, a localized coating system which has already been investigated will be applied to the suppression pool welds.
On March 18, 1983, following the exit meeting with the NRC Inspector, discussions were held with Dr. MacDonald of the Ohio State University's Fontana Corrosion Center on the requirements for both the electrochemical potential monitoring and metallurgical examination phases of the program.
8306130305 830600 PDR ADOCK 05000440 G
PDR JUN 3 1983
Mr. Jtmes C, Kspplar May 31, 1983 Subsequent to this meeting, the Project Organization placed on order 304 stainless clad carbon steel plate material which is typical of that used in construction of the first two containment vessel shell courses.
Samples of this plate material will be preconditioned to be representative of fissured and non-fissured containment weld heat af fected zones. These metallurgical specimens will be mounted in the pool and periodically inspected for crevice corrosion progression.
Currently, preliminary sketches detailing the hardware required for both the metallurgical sample supports and the electrochemical monitoring supports have been developed and engineering drawings requested.
Installation of this support hardware in the Unit #1 Suppression Pool is targeted for the Fall of 1983.
We are continuing to work with Dr. MacDonald on the establishment of monitoring criteria. The Project should have the complete program in place by the Spring of 1984. We will continue to keep you informed on the further development of the suppression pool monitoring program.
Sincerely, Murray R. Edelman Vice President Nuclear Group MRE:pab cc: Mr. M. L. Gildner NRC Site Of fice Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 U.S. Nuclear Redulatory 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 i
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