ML20135F024

Responds to NRC RAI Re 951130 LAR Re Sleeving Option for SG Tube Repair.Final Repts CEN-630-NP,rev 1 & CEN-630-P,rev 1 encl.CEN-630-P Withheld Per 10CFR2.790

ML20135F024
Person / Time
Site:	Calvert Cliffs
Issue date:	03/06/1997
From:	Cruse C BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20135F027	List: ML20135F024 ML20135F044
References
TAC-M94205, TAC-M94206, NUDOCS 9703110130
Download: ML20135F024 (3)

Text

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Curut.Es II CutsE Baltimore Gas and Sectric Company Vice President Calven Cliffs Nuclear Power Plant Nuclear Energy 1650 Calvert Cliffs Parkway Lusby, Maryhnd 20657 410 495 4455 March 6,1997 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION: Document Control Desk

SUBJECT:

Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2; Docket Nos. 50-317 & 50-318 Response to Request for Additional Information Regarding License Amendment Request: Sleeving Option for Steam Generator Tube Repair (TAC Nos M94205

& M94206)

REFERENCES:

(a) Letter from Mr. R. E. Denton (BGE) to NRC Document Control Desk, dated November 30,1995, " License Amendment Request: Sleeving Option for Steam Generator Tube Repair" (b) Letter from Mr. D. G. Mcdonald, Jr. (NRC) to Mr. C. H. Cruse (BGE),

dated March 22,1996, " Issuance of Amendments for Calvert Cliffs Nuclear Plant, Unit No.1 (TAC No. M94205) and Unit No. 2 (TAC No. M94206)"

(c) Letter from Mr. D. G. Mcdonald, Jr. (NRC) to Mr. C. H. Cruse (BGE),

dated February '5, 1996, " Request for Additional Information Regarding ABB-CE Steam Generator Tube Sleeving Process - Calvert Cliffs Nuclear Plant, Unit Nos. I and 2 (TAC Nos. M94205 and M94206)"

(d) Letter from Mr. G. F. Dick, Jr.(NRC) to Mr. D. L. Farrar (Commonwealth Edison Cc,mpany), dated April 12,1996, " Issuance of Amendments - Byron and Braidwuod Stations (TAC Nos. M92375, J ] OM3 M2376, M92377 and M92378)

By letter dated November 30,1995 (Reference a), the Baltimore Gas and Electric Company requested an Amendment to Operating License Nos. DPR-53 and DPR-69 to allow the installation of tube sleeves as an alternative to plugging to repair defective steam generator tubes. Specifically, Reference (a) requested approval of sleeving repair techniques developed by Westinghouse Electric Corporation and ABB Combustion Engineering, Inc. (ABB-CE) for Calvert Clifts application. The Westinghouse t portion l of the amendment request was approved on February 26,1996 (Reference b), while the NRC continued -

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Document Control Desk March 6,1997 Page 2

to review the ABB-CE sleeve portion of the application, pending the resolution of generic issues raised i

by industry experience related to the use of ABB-CE sleeves. This letter responds to the additional

! information requested by the NRC staff to address these generic issues (Reference c).

The event that caused the NRC to issue a request for additional information is the discovery of sleeve joint circumferential and volumetric indications involving the ABB-CE sleeves installed at Prairie Island Unit 1. To address the generic issues raised by the Prairie Island event, ABB-CE issued a proprietary i

report, CEN-628-P, Revision 00, " Verification of the Structural Integrity of the ABB CENO Steam Generator Welded Sleeve," which has been reviewed by the NRC in connection with Commonwealth j Edison Company's license amendment request for its Byron and Braidwood Stations (Reference d). In addition, ABB-CE issued a new updated generic licensing report for repair of 3/4" O.D. Nam generator 1

tubes using its Leak Tight Sleeves (CEN-630-P, Revision 01). The additional information requested by

! Reference (c) is contained in CEN-628-P, Revision 00, and CEN-630-P, Revision 01. This information

has been reviewed and approved by the NRC, as evidenced by the NRC approval of the ABB-CE Leak Tight Sleeves for use at Byron and Braidwood Stations (Reference d).

1 The ABB-CE proprietary report CEN-630-P, Revision 01, supersedes the Calvert Cliffs plant-specific report, CEN-626-P, Revision 00, submitted with our license amendment request (Reference a), and

bounds the conditions that exist at Calvert Cliffs. Therefore, the licensing report for the proposed use of *

ABB-CE Leak Tight Sleeves at Calvert Cliffs is CEN 630-P, Revision 01. To incorporate the updated

licensing report, revised Technical Specification marked-up pages are provided (Attachments I and 2).

1 These marked-up pages supersede the previously submitted marked-up pages for ABB-CE sleeves. The ,

new information contained in the updated licensing report (CEN-630-P, Revision 01) and the additional

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information requested by the NRC do not impact the conclusions reached in Reference (a), with respect to the significant hazards determination.

Attachments (4) and (5) are the proprietary (CEN-630-P) and the non-proprietary version (CEN-630-NP) l of the ABB-CE report, " Repair of 3/4" O.D. Steam Generator Tubes Using Leak Tight Sleeves, j Revision 01," respectively. Attachment (3) is the accompanying affidavit signed by ABB-CE, the owner of the proprietary information. The affidavit sets forth the basis on which the information may be

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withheld from public disclosure by the Commission, and addresses with specificity the considerations listed in 10 CFR 2.790(b)(4). Accordingly, it is respectfully requested that the information which is j proprietary to ABB-CE be withheld from public disclosure.

i Although not considered a priority for the upcoming Unit 2 refueling outage, scheduled to begin on i March 14,1997, BGE wishes to have the ABB-CE sleeves as an option to repair defective steam l generator tubes, should it become necessary.

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Document Control Desk March 6,1997 Page 3 l

l 1

Should you have further questions regarding this matter, we would be pleased to discuss them with you. .

l

Very truly yours,

l. / &

STATE CF MARYLAND  :

TO WIT:

COUNTY OF CALVERT  :

. 1, Charles H. Cruse, being duly sworn, state that I am Vice President, Nuclear Energy Division, Baltimore Gas and Electric Company (BGE), and that I am duly authorized to execute and file this

License Amendment Request on behalf of BGE. To the best of my knowledge and belief, the statements i

contained in this document are true and correct. To the extent that these statements are not based on my j personal knowledge, they are based upon information provi.ded by other BGE employees and/or 2 '

consultants. Such information has been reviewed in accordance company practi nd I believe it to i l be reliable. / ,

/ A+

l Subscribed and swom before me, a Notary Public in and for the State of Maryland and County of

Cmivert . this lo day of ma rc h .1997.

WITNESS my Hand and Notarial Seal:

l Notary Public My Commission Expires: < L lba. O Nb te CHC/GT/ dim Attachments: (1) Unit 1 Marked-Up Technical Specification Pages (2) Unit 2 Marked-Up Technical Specification Pages (3) ABB Combustion Engineering Proprietary Affidavit for Attachment 4, Pursuant to 10 CFR 2.790 (4) Proprietary ABB Combustion Engineering Report CEN-630-P, Revision 01;

" Repair of 3/4" O.D. Steam Generator Tubes Using Leak Tight Sleeves,"

August 1996 (5) Non Proprietary ABB Combustion Engineering Report CEN-630-NP, Revision 01; " Repair of 3/4" O.D. Steam Generator Tubes Using Leak Tight Sleeves," August 1996 cc: A. W. Dromerick, NRC (Without Attachments) cc: D. A. Brune, Esquire H. J. Miller, NRC J. H. Walter, PSC J. E. Silberg, Esquire Resident inspector, NRC Director, Project Directorate I-1, NRC R. J. McLean, DNR