ML20137V854

Forwards Diesel Engine 2A Component Revalidation Insps & Results Per Insp Plan Submitted on 850430.Defective Weld Heads Replaced.Diesel Engine 2B Insp in Progress.Insp Rept Will Not Be Submitted Based on Prior Insps

ML20137V854
Person / Time
Site:	Catawba
Issue date:	10/02/1985
From:	Tucker H DUKE POWER CO.
To:	Adensam E, Harold Denton Office of Nuclear Reactor Regulation
Shared Package
ML20137V860	List: ML20137V854 ML20137V914
References
NUDOCS 8510040144
Download: ML20137V854 (2)

Text

r DUKE POWER GOMPANY P.O.. BOX 33189 CHARLOTTE, N.C. 28242 HAL B. TUCKER meum

" " '"a.noen, poq amn

= = = = = = = = = October 2, 1985 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory-Commission Washington, D. C. 20555 Attention: Ms. E. G.-Adensam, Chief Licensing Branch No. 4 Regarding: Catawba Nuclear Station, Unit 2 Docket No. 50-414

Dear Mr. Denton:

The purpose of this letter is to submit the enclosed ~ report of the Catawba

'2A diesel engine Component Revalidation Inspections. .The inspections were performed in accordance with the instpection plans we submitted to you on April 30, 1985 with several additions to incorporate comments received from the NRC and NRC consultants.

Extensive disassembly and inspection of the 2A diesel engine has been com-pleted. Since~ this is a new engine and has not been run onsite, the purpose of this inspection was to confirm the satisfactory condition of various engine parts and to ensure the proper assembly of the engine by the use of controlled assembly procedures. The only significant condition found as a

-result'of the inspecticn was that five heads were plug welded using partial penetration welds. Since extensive testing of the Unit i diesel generators revealed a problem with the partial penetration weld repairs. the five heads on engine 2A were replaced as were the defective heada on the Unit 1

. diesel engines.

Inspection of th7 2B diesel engine is now in progress. Based on the results of the 1A, 1B and 2A diesel engine inspections, Duke Power Company considers all expected conditions of engine 2B fully addressed. Therefore, unless conditions not addressed in the previous reports are found during the 2B engine inspection, Duke will not submit the inspection report for the 2B engine.

However, this report will be available onsite.

'Ihe Unit .2 diesel generators will be declared operable, in accordance with the Technical Specifications for Catawba Unit 2, prior to fuel loading.

Based on this, as well as the results of the extensive inspections and test-ing of the diesel generators at Catawba Duke has concluded that the diesel generators at Catawba will provide a reliable source of backup power.

'Very truly yours, Hal B.-Tucker g[

WLH: sib 8510040144 851002 4 DR ADOCK O ( )

l Enclosure

Mr.-Harold R. Denton, Director October 2~, 1985 Page Two cc: Dr. J. Nelson Grace, Regional Administrator U.-S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta . Georgia 30323 Palmetto Alliance 2135 Devine Street Columbia, South Carolina 29205 Robert Guild, Esq.

P. O. Box 12097 Charleston, South Carolina 29412 Mr. Jesse L. Riley

. Carolina Environmental Study Group 854 Henley Place Charlotte, North Carolina 28207 NRC Resident Inspector Catawba Nuclear Station

.