ML20101B646
| ML20101B646 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 12/07/1984 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-84, REF-PT21-85-055-000 (RDC-122(84)), PT21-85-055-000, PT21-85-55, NUDOCS 8412200428 | |
| Download: ML20101B646 (2) | |
Text
Ama TH E CL EV E L/iN D E L ECTRIC ILLU MIN /! TIN G CO M P A NY P.o. Box 5000 - CLEVELAND. oHlo 44101 - TELEPhoNL (216) 622-9800 - ILLUMINATING BLDG. - 55 PUBLICSQUARE Serving The Best Location in the Nation MURRA\\ R. EDELMAN VICE PftEllOENT NUCLEAW Mr. James G. Keppler Regional Administrator, Region III Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Rooseve. Road Glen Ellyn, Illinois 60137 RE: Perry Nuclear Power Plant Docket Nos. 50-440; 50-441 Feedwater System (N27) Pipe Rupture Design [RDC 122(84)]
Dear Mr. Keppler:
This letter serves as an interim report pursuant to 10CFR50.55(e) on the potential significant deficiency regarding an improper assumption which was utilized in designing for a postulated pipe rupture of the Perry Nuclear Power Plant (PNPP) reactor feedwater (N27) system.
Mr. R. Knop of your office was notified by Mr. P. P. Martin of The Cleveland Electric Illuminating Company (CEI) on November 9, 1984, that this problem was being evaluated per our Deviation Analysis Report 216.
This report containa a description of the deficiency and our proposed corrective action.
Description of Deficiency On October 26, 1984, our Architect / Engineer Gilbert Commonwealth, Inc. (G/C) filed a 10CFR21 report which stated that, in designing for postulated pipe rupture of the PNPP feedwater syst n, the jet force and jet shape information used for the feedwater pump side of a break was also used for the reactor side.
It was subsequently determined that the total jet force on the reactor side may be 25% greater, and the jet shape pctentially different, than had been assumed in the G/C calculation.
Corrective Action l
Gilbert / Commonwealth, Inc., has reviewed the jet. pressure calculations for i
other Perry systems and has determined that this discrepancy exists only in the feedwater system. G/C will also review all targets and shields which may be affected by the increased jet impingement pressure to determine if failure of l
protection devices or essential equipment might occur. Additional shielding and/or shielding modifications will be designed and installed if required by i
the results of the review.
8412200428 841207
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e Mr. J: men G. K:pplsr Dresabar 7, 1984 i
We will submit our next report on this subject by February 14, 1985. Please call if there are any questions.
Sincerely, k.
rray R. Edelman Vice President Nuclear Group MRE:pab cc:
Mr. J. A. Grobe USNRC, Site Office Mr. D. E. Keating USNRC, Site Office Director Office of Inspection and Enforcement
-U.S. Nuclear Regulatory Commission.
Washington, D.C.
20555 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 I
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