ML18059A425

Forwards Proprietary Topical Rept CEN-406-P, Status Rept on CEOG Activities Concerning Primary Water Stress Corrosion Cracking of Inconel-600 Penetrations. Rept Withheld,Per 10CFR2.790

ML18059A425
Person / Time
Site:	Palisades
Issue date:	05/31/1991
From:	Hutchinson J C-E OPERATING PLANTS OWNERS GROUP
To:	Russell W Office of Nuclear Reactor Regulation
Shared Package
ML18059A421	List: ML18059A420 ML18059A422 ML18059A423 ML18059A424 ML18059A425
References
CEOG-91-300, NUDOCS 9310120440
Download: ML18059A425 (2)

Text

.

COMBUSTION ENGINEERING OWNERS GROUP Arizona Public Senllca Co. ConSumera Power Co. Maine Yankee Atomic Po- Co. Omaha Public Power District Entergy Operations Palo Verde 1. 2. 3 Palisades Maine Yankee Ft Calhoun Baltimore Gas & Electric AN02 Florida Power & Ught Co. Northeast Utilities Service Co. Southern Calilomla Edison Co.

Calven Cliffs 1. 2 WSESUnit3 St. Lucie 1. 2 Millstone 2 SONGS 2. 3 John J. Hutchinson, Chairman c/o Florida Power & Light/700 Universe Boulevard/Juno Beach, FL 33408 May 31 1 1991 CEOG-91-300 Mr. William T. Russell Associate Director for Inspection and Technical Assessment Off ice of Nuclear Reactor Regulation

u. s *. *Nuclear Regulatory Commission Washington, DC 20055

Subject:

CEOG Inconel-600 Working Group status Report

Reference:

Letter CEOG-89-764, Nelson, P.R. (ABB-CE) to Miraglia, F.J. (NRC), CEN-393-P, "Evaluation of Pressurizer Heater Sleeve susceptibility to Primary water stress corrosion cracking", November 17, 1989.

Dear Mr. Russell:

Since this report was requested by Mr. Ching-Yao Cheng of your staff during a CEOG/NRC meeting on December 4, 1990, the enclosed report, CEN report 406-P, "A Status Report on CEOG Activities Concerning Primary Water Stress Corrosion Cracking of Inconel-600 Penetrations," (Enclosure 1) is provided for your information. As this report was requested by the NRC and is being provided for information only, it is expected that it will not be subject to a review fee.

As discussed at the December 4, 1990 meeting and demonstrated in the enclosed report, primary water stress corrosion cracking of Inconel-600 primary pressure boundary penetrations is not expected

_J to be safety significant based on the CEOG evaluations. The CEOG previously provided the NRC, via the Reference, inspection recommendations for Inconel-600 pressurizer heater sleeves. The CEOG has under consideration a proposal to update these recommendations based on the additional work that has been performed. .This proposal will be considered for approval by the Group at its June 26 and 27 meeting. I will inform you of the decision which is reached at that time.

.*:9310120440

DR ADOC~~.05000255. 931007

.. ,_**_f!DR:_

e.r: ), ,*

• ~ \ ......... }~

.Inconel-600 Page 2 CEOG-91-300 Information contained in the enclosed report is considered by ABB Combustion Engineering to be proprietary in nature. As such, ABB-CE requests that it be withheld from public disclosure in accordance with the provisions of 10 CFR 2 ~ 790 and that the material be safeguarded. The reasons for the classification of this material as proprietary are delineated in the attached affidavit (Enclosure 2).

If you have any questions, please contact Don Wright, CEOG Inconel-600 Working Group Chairman at (301) 787-5519.

Sincerely,

~t ""- "'Rl.i. /~~

CJrohn H:t;IJson Chairman, CE Owners Group

Enclosures:

As Stated in letter (Enclosure 1 Copies 000001 to 000005) cc: c~ Cheng (NRC)

R. Hermann (NRC)