ML20155G100
| ML20155G100 | |
| Person / Time | |
|---|---|
| Issue date: | 07/18/1997 |
| From: | Beardslee C, Hornseth G NRC (Affiliation Not Assigned) |
| To: | Sullivan E NRC (Affiliation Not Assigned) |
| Shared Package | |
| ML20155F320 | List: |
| References | |
| FOIA-97-488 NUDOCS 9811060204 | |
| Download: ML20155G100 (2) | |
Text
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July 18,1997
, t N f l ls ,
'g MEMORANDUM TO: Edmund J. Sullivan, Chief Section B !
Materials and Chemical Engineering Branch FROM: Geoff P. Hornseth, Materials Engineer !
Section B Materials and Chemical Engineering Branch Cheryl D. Beardslee, Materials Engineer l Section B '
Materials and Chemical Engineering Branch l-
SUBJECT:
TRIP REPORT - MAY MEETING WITH ONTARIO HYDRO,
! IN TORONTO, CANADA TO DISCUSS CANADIAN 1 . EXPERIENCES WITH ELECTROSLEEVES During the period from May 6 to May 7,1997, the travelers participated in a meeting with representatives from Ontario Hydro, Union Electric and Framatome. The purpose of the meeting was to discuss the Canadian's experiences with Electrosleeves, and to review steam generator tube metallurgical samples used in Framatome's qualification of the ultrasonic testing system which will be used to inspect Electrosleeves in the U.S..
i Attachment I provides a summary of the meeting. In addition, the meeting was a noticed open public meeting and a meeting summary, which conta'ms proprietary meeting handouts, is being created.
Attachment:
As stated cc: Brian Sheron Gus Lainas !
Jack Strosnider Kris Thomas Bob Hermann l CONTACT: Cheryl D. Beardslee, EMCB\DE 415-2751 Distribution CentralFiles EMCB R/F LBanic DOCUMENTNAME: G:\BEARDSLE\CAN_ TRIP.RPT To reesiw a copy of this document, indieste in the box 'C'= Copy w/o enachment/ enclosure 'E*= Copy with attachment / enclosure 'N'= No copy omC EMCB E E EMCB E NAME CBeardsleh GHomsethM DATE Gghg7:jb 1 /1997
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l 9811060204 981102
! PDR FOIA l WILLIAM 97-488 PDR
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[ The meeting began with a presentation by Ontario Hydro, who originally developed and installed i Electrosleeves in a Canadian nuclear power plant. The presentation revolved around installation, inspection and operating experience.
The Electrosleeves installed in the Canadian nuclear power plant are similar to those proposed for U.S. plants. They are used as a structural sleeve, which is the same as that proposed in the U.S..
One fundamental difference between the Canadian and U.S. application is that the Canadian steam generator tubing is not experiencing stress corrosion cracking (SCC). The parent tube material is Monel and has only experienced pitting. Therefore, the non-destructive technique (ultrasonic testing) was only qualified for sizing pits. .In the U.S., Electrosleeving would be installed over parent tubes with SCC, which, therefore, necessitates a non-destmetive (NDE) inspection technique capable of sizing cracks.
Union Electric included tables in several submittals to the NRC that contained comparisons between ultrasonic (UT) inspection results and actual metallurgical results in support of UT qualification. The NRC employees reviewed these metallurgical samples, compared them to data in the tables, and determined that the tables were not accurate (i.e., data was not consistently recoroed and could cause ambiguous interpretation of the tables). Union Electric agreed to review the metallurgical samples and correct the tables accordingly.
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