ML112231883

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Forwards Final Version of Metallurgical Investigation of Cracking in Reactor Vessel Nozzle Safe-End. Photographs & Supporting Documentation Encl
ML112231883
Person / Time
Site: Duane Arnold NextEra Energy icon.png
Issue date: 01/30/1979
From: Leslie Liu
IES Utilities, (Formerly Iowa Electric Light & Power Co)
To: Harold Denton
Office of Nuclear Reactor Regulation
Shared Package
ML112231884 List:
References
IE-79-51, NUDOCS 7902120156
Download: ML112231883 (3)


Text

) REGULA IRY INFORMATION DISTRIBUTI(WYSTEM (RIDS) 0 ACCEtSLON NBR:7902120J14 DOC.DATE: 79/0.1/30 NOTARIZED,: No DOCKET #

( FACIL:50-331 Duane Arnold Energy Center, Iowa -Electric Light & Pow 0500033 AUTH.NAME AUTHOR AFFILIATION LIU,L. Iowa Electric Light & Power Co.

( RECIP.NAME RECIPIENT AFFILIATION (

DENTON,H. Office of Nuclear Reactor Regulati..on

()

SUBJECT:

Forwards final version of **Metallurgical Investigation of cracking in Reactor Vessel Nozzle Safe-End." Photographs &

supporting documenta n encl.

DISTRIBUTION CODES A001S, COPIES RECEIVED-:LTR L ENCL _Y10 SIZE: /t 0 DISTRIBUTION FOR AFTER ISSUANCE OF. OPERATING LIC

( RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL ACTION: 05 BC OR6 #3 7 7 INTERNAL-.: REG 1 .1 02 NRC PDR 1 1 1 2 2 14 TA/EDO 1 1

( 15 CORE PERF BR I I 16 AD SYS/PROJ I 1 17 ENGR BR I 1 18 REAC SFTY BR 1 1 19 PLANT -SYS BR I 1 20 EEB 1 1

( 21 EFLT TRT SYS 1 1 22 BRINKMAN 1 1 EXTERNAL: 03 LPDR .1 1 04 NSIC I 1

( 23. ACRS 16 16 TOTAL NUMBER OF CO.PIES REQUIRED: LTTR 38 ENCL 38

IOWA ELECTRIc LIGHT AND POWER COMPANY General Qffice CEDAR RAPIDS. IOWA January 30, 1979 LEE LIU IE-79-51 SENIOR VICE PRESIDENT - ENGINEERING Mr. Harold Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555

Dear Mr. Denton:

My letter IE-78-1563 of October 27, 1978 forwarded the Southwest Research Institute (SwRI) interim report titled "Metallurgical Investigation of Cracking in a Reactor Vessel Nozzle Safe-End. Enclosed herewith are 40 copies of the SwRI Final Report. Also, included is one set of photographs used for the various figures in the report as requested by Mr.

Richard Johnson of your staff.

Very truly yours, Lee Liu Senior Vice President-Engineering LL/KAM/lw cc: K. Meyer D. Arnold R. Lowenstein R. Clark (NRC)

H. Rehrauer B-31c ro4

IOWA ELECTRIc LIGHT AND POWER COMPANY General Office CEDAR RAPIDS. IOWA January 30, 1979 LEE LIU IE-79-51 SENIOR VICE PRESIDENT- ENGINEERING Mr. Harold Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, b. C. 20555

Dear Mr. Denton:

My letter IE-78-1563 of October 27, 1978 forwarded the Southwest Research Institute (SwRI) interim report titled "Metallurgical Investigation of Cracking in a Reactor Vessel Nozzle Safe-End. Enclosed herewith are 40 copies of the SwRI Final Report. Also, included is one set of photographs used for the various figures in the report as requested by Mr.

Richard Johnson of your staff.

Very truly yours, Lee Liu Senior Vice President-Engineering LL/KAM/1w cc: K. Meyer D. Arnold R. Lowenstein R. Clark (NRC)

H. Rehrauer B-31c