ML20024F183
| ML20024F183 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 08/30/1983 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-83 10CFR-050.55E, 10CFR-50.55E, RDC-78(83), NUDOCS 8309090015 | |
| Download: ML20024F183 (2) | |
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P.o. BOX 5000 - CLEVELAND, oHlo 44101 - TELEPHONE (216) 622-9800 - ILLUMINATING BLOG.
- 55 PUBl.lCSQUARE Serving The Best Location in the Nation MURRAY R. EDELMAN VICE PRESIDENT NUCLEAR August 30, 1983 Mr. James G. Keppler Regional Administrator, Region III Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 RE:
Perry Nuclear Power Plant Docket Nos. 50-440; 50-441 Design of the Diesel Generator Exhaust Piping [RDC 78(83)]
Dear Mr. Keppler:
This letter serves as the interim report pursuant to 10CFR50.55(e) on the deficiencies concerning exhaust line back pressures exceeding manufacturer's recommendations on the Standby Diesel Generators and the Diesel Generators for the High Pressure Core Spray System (HPCS).
Mr. P. R. Pelke of your office was notified on August 5,1983, by Mr. C. M. Shuster of The Cleveland Electric Illuminating Company that this problem was being evaluated. On July 27, 1983, Gilbert Associates, Inc. (CAI), the Architect / Engineer for PNPP, notified the Nuclear Regulatory Commission, under 10CFR21, of a deficiency involving the design of diesel generator exhaust piping.
This report contains a description of the deficiencies and corrective action.
Description of Deficiencies The design of the exhaust piping for the Standby Diesel Generators is such that exhaust flows greater than 757 of rated flow could result in engine stalling, thereby preventing the diesel generators from supplying emergency power.
The design of the exhaust piping for the High Pressure Core Spray (HPCS) diesel generators is such that the backpressure at rated flow exceeds manu-facturer's recommendations.
Existence of excessive backpressure could cause engine stalling at rated load ar.d consequent failure of the HPCS system to perform.
8309090015 830830 PDR ADOCK 05000440 S
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Mr. Jtmes G. Kappler August 30, 1983
' Corrective Action
~ Gilbert Associates,'Inc. (GAI),-is currently investigating design alternatives to correct both these conditions.. The cause was determined to be the use of standard cubic feet / minute versus actual cubic feet / minute, at diesel exhaust 1
temperatures, in the calculation of exhaust line pressure drop.
GAI is
- performing a review of calculations performed by the originator of the calcu-lations to confirm that-these are isolated instances.
We anticipate the next report on this subject to be submitted by October 7, 1983.
Please call if there cre additional questions.
Sincerely, Kisi urray R. Edelman Vice President Nuclear Group MRE:pab cc:
Mr. M. L. Gildner
- NRC Site Office Director Office of Inspection and Enforcement 10.S. Nuclear Regulatory Commission Washington, D.C.
20555 U.S. Nuclear Regulatory Commission c/o Document Management Branch e
Washington, D.C.
20555 Records Center, SEE-IN
. Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500
. Atlanta, Georgia 30339 F
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