ML20027D768

Summary of Meeting W/Westinghouse & Anl in Bethesda,Md Re Mod of Program for Steam Generators to Preclude Damaging Tube Vibration Experienced on Model D4/D5/E Steam Generators

ML20027D768
Person / Time
Issue date:	10/28/1982
From:	Kane W Office of Nuclear Reactor Regulation
To:	Youngblood B Office of Nuclear Reactor Regulation
References
NUDOCS 8211090100
Download: ML20027D768 (4)

Text

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OCT 2 81982 MEMORANDUM FOR:

B. J. Youngblood, Chief Licensing Branch No. 1 Division of Licensing FROM:

William F. Kane, Project Manager Licensing Branch No.1 Division of Licensing

SUBJECT:

Sutt4ARY OF MEETING WITH WESTINGHOUSE REGARDING f100EL 04/05/E SN AM GENERATORS General Representatives of the NRC staff and its consultant, Argonne Ndtional Laboratory net with Westinghouse to discuss t"a Model D4/05/E steam generators. The meet-ing was held at i.he NRC offices in Bethesda, liaryland. A list of those persons who attended the meeting is included in the enclosure.

PJrpose The purpose of the meeting was te discuss the program for modifying these types of stesm generators to preclude the damaging tube vibration which had been experi-enced on some Model D3 steam generators.

Discussion Westinghouse described the basic physical differences between the Model D2/D3 steam generators and the Model D4/05/E steam generators. The flodel D4/D5/E steam generators have a different flow pattern for the main feedwater flow than the tiodel D2/03 steam generators due to a different arrangenent of the internal baffling.

Consequently, the tubes in the Model D4/05/E steam generators would be expected to l

have a different response than those in the Model D2/D3 steam generators. Westing-l house expects that some modification will be required for the Model D4/05/E steam l

generators. However, based on the information to date they do not expect that the l

problem will be as severe.

i Westinghouse also discussed the differences between the Model 04, D5 and E steam l

generators. There appear to be no differences which would preclude a similar solution to this problem for these types of steam generators.

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~ 8. J. Youngblood

-2 OCT 2 81982 The only operating

' ;nt in this category is the Krsko plant in Yugoslavia which uses Model D4 steam generators. This plant was modified in mid-1982 because of concerns related to tube vibration. The modification to that plant involved diverting 30 percent of the main feedwater flow to the auxiliary feedwater nozzle.

However, it is noc clear at this time that this modification will be applied to the remainder of the Model D4/05/E facilities.

Westinghouse described the test facilities which are, or will be, used in the Model D4/D5/E program. Westinghouse expects that the modification for the Model D4/05/E facilities will be selected in early 1983.

The donestic facilities employing Model 04/D5/E steam generators are as follows:

Facility Model Number of Loops Braidwood 1 D4 4

Byron 1 D4 4

Comanche Peak 1 D4 4

Marble Hill 1 D4 4

Shearon Harris 1 D4 3

Shcaron Harris 2 04 3

Braidwood 2 05 4

Byron 2 05 4

Catawba 2 D5 4

Comanche Peak 2 DS 4

Marble Hill 2 05 4

South Texas 1 E

4 South Texas 2 E

4 Original signed by:

Willin:n Kano William F. Kane, Project Manager Licensing Branch No.1 Division of Licensing

Enclosure:

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LIST OF ATTENDEES NRC Staff Duke Power Company W. Kane A. Sudduth D. Eisenhut T. Novak G. Lainas Commonwealth Edison Company L. Frank C. Cheng P. Boyle E. Igne, ACRS V. Copeland P. Trembley, ACRS G. Weidenhamer, RES H. Conrad Houston Lighting & Powdr Company P. Matthews T. Cox, DEDROGR B. Poole J. Rajan Argonne-National Laboratory S. S. Chen Westinghouse,.

T. Timmons E. Burns W. Hamilton J. Conner T. Bengel

.J. McGuffin e

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MEETING

SUMMARY

OCT 2 81982 u; Central:Filesda NRC PDR L PDR PRC System NSIC LBf1 Rdg.

M. Rushbrook P^roject Manager

'W.

Kane Attorney, OELD

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W. Lovelace*

OPA*

L, Olshan S. Burwell B. Doolittle D. Sells K. Ja.bbour NRC PARTICIPANTS

'W.

Kane D. Eisenhut

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T. Novak G. Lainas

'L. Frank C. Cheng s

E. Igne, ACRS P. Trembley, ACRS G. Weidenhamer, RES H. Conrad P. Matthews T. Cox, DEDROGR J. Rajan

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