ML20137N075

Forwards RAI Re Sleeving Option for SG Tubes to Allow Use of Sleeves Designed by Abb/Ce

ML20137N075
Person / Time
Site:	Calvert Cliffs
Issue date:	04/01/1997
From:	Dromerick A NRC (Affiliation Not Assigned)
To:	Cruse C BALTIMORE GAS & ELECTRIC CO.
References
TAC-M94205, TAC-M94206, NUDOCS 9704080245
Download: ML20137N075 (5)

Text

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, Mr. Charles H. Cruse April 1, 1997 Vice PresidInt - Nuclear Energy Baltimore Gas and Electric Company Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, MD 20657-4702

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST SLEEVING OPTION FOR STEAM GENERATOR TUBE REPAIR l (TAC NOS. M94205 AND M94206)

Dear Mr. Cruse:

By letter dated March 6, 1997, Baltimore Gas and Electric Company submitted a i response regarding the Sleeving Option for steam generator tubes to allow the I use of sleeves designed by ABB/CE. The NRC staff has reviewed your submittal i and has determined that additional information is required. The information i required is in the Enclosure. l To support your review schedule, it is requested that the required information -

be provided within 15 days of the receipt of this letter. Should you have any ,

_ questions, please do not hesitate to contact me at (301) 415-3473.

Sincerely,  !

/S/ I Alexander W. Dromerick, Senior Project Manager Project Directorate 1-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation i Docket Nos. 50-317 and 50-318

Enclosure:

Request for Additional Information cc w/encls: See next page \

DISTRIBUTION: '

Docket File )g PUBLIC PDI-1 R/F I L 1 S. Varga A. Dromerick

. S. Little s Y L. Doerflein, RI DOCUMENT NAME: G:\CCl-2\M94205.RAI To receive a copy of this document, indicate in the box: "C" = Copy without attachment / enclosure "E" = Copy with attachment / enclosure "N" - No copy I onics m: pot.1, r) Ie LA: Poi n I p: Poi t . , o _ l l l tiant Apradsdekitta t sti t tte" saajwe 4MN DATE 06// /97 06/ { /97 06/ / /97 Offic'al Record Copy.

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PDR ADOCK 050CO317

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j NUCLEAR REGULATORY COMMISSION WASHINGTON. D.C. 20066-0001 April 1, 1997

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Mr. Charles Cruse Vice Presider.t - Nuclear Energy Baltimore Gat and Electric Company Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway .

Lusby, MD 20657-4702

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT REQUEST-SLEEVING OPTION FOR STEAM GENERATOR TUBE REPAIR (TAC NOS. M94205 AND M94206)

Dear Mr. Cruse:

By letter dated March 6, 1997, Baltimore Gas and Electric Company submitted a response regarding the Sleeving Option for steam generator tubes to allow the l use.of sleeves designed by ABB/CE. The NRC staff has reviewed your submittal l and has determined that additional information is required. The information required is in the Enclosure.

To support your review schedule, it is requested that the required information be provided within 15 days of the receipt of this letter. Should you have any .

questions, please do not hesitate to contact me at (301) 415-3473.  !

Sincerely, ,

h@&

Alexa der W. Dromerick, Senior Project Manager j Project Directorate I-1 i Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Docket Nos. 50-317 and 50-318

Enclosure:

Request for Additional Information cc w/encls: See next page 4

1 l

l l

1

Mr. Charles H. Cruse Calvert Cliffs Nuclear Power Plant Baltimore Gas & Electric Company Unit Nos. I and 2 I

cc:

President Mr. Joseph H. Walter, Chief Engineer Calvert County Board of Public Service Commission of Commissioners Maryland-175 Main Street Engine 0 ring Division Prince Frederick, MD 20678 6 St. Paul Centre Baltimore, MD 21202-6806 James P. Bennett, Esquire Counsel Kristen A. Burger, Esquire Baltimore Gas and Electric Company Maryland People's Counsel P.O. Box 1475 6 St. Paul Centre Baltimore, MD 21203 Suite 2102 Baltimore, MD 21202-1631

' Jay E. Silberg, Esquire Shaw, Pittman, Potts, and Trowbridge Patricia T. Birnie, Esquire 2300 N Street, NW Co-Director Washington, DC 20037 Maryland Safe Energy Coalition P.O. Box 33111 Mr. Terrence J. Camilleri, Director, Baltimore, MD 21218 NRM Calvert Cliffs Nuclear Power Plant Mr. Larry Bell 1650 Calvert Cliffs Parkway NRC Technical Training Center Lusby, MD 20657-4702 5700 Brainerd Road  ;

Chattanooga, TN 37411-4017 )

Resident Inspector i U.S. Nuclear Regulatory Commission-P.O. Box 287 i St. Leonard, MD 20685 Mr. Richard I. McLean '

Administrator - Radioecology Department of Natural Resources 580 Taylor Avenue Tawes State Office Building, B3 Annapolis, MD 21401 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 l

REQUEST FOR ADDITIONAL INFORMATION j REGARDING CALVERT CLIFFS TECHNICAL SPECIFICATION i

CHANGE TO ALLOW USE OF STEAM GENERATOR  :

TUBE SLEEVES DESIGNED BY ABB/CE

1. It appears that the sleeve plugging limit, discussed on page 8-9 of CEN 630-P should be 48.7% minus an allowance for NDE uncertainty and flaw ,

growth instead of the presently stated TS wording of 40%. Please '

clarify what the correct value should be for ABB/CE sleeves End provide appropriate TS wording changes if needed.

2. The staff notes the generic topical provides for post weld heat treatment (PWHT) as an optional item. The staff position is that PWHT enhances service life of the repair by lowering residual stress. This should result in increased time to crack initiation and possibly lower crack growth rates. What is the licensee's intention with respect to PWHT and basis for acceptability if the PWHT is not performed? Please ,

provide data as necessary to support your bases. '

3. The staff believes that the inspection and expansion criteria in the i EPRI steam generator tube examination guidelines should be satisfied, as I a minimum, for all sleeved tubes. Please provide appropriate wording in the TS reflecting this criteria. For reference, a previously adopted table incorporated in the TS of another licensee is attached.

J ENCLOSURE i

I

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se ATTACMENT

i il TABLE d.4 3 q .

STEAM GENERATOR REPAIRFf5 Ti ser ud2PECTION i .

e 1

IST SAMPLE INSPECTON -

Somme See p==? '- 2ND SAMPLE sNSPECTON

.Renunes i

A nunenum of 20% of

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C1 None seposes tubes (1)(2) NA. N.A.

- C.2 Phg doiselbe messedtubes

. C1 None

andmensel tops of en espokedheeshIMes.0. '

j

. C-2 Paveee W sesenestutes

C.

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j C3 hopect of soposed hees hIMs As einer s.O.s are 8.0 phe setseinetubesand tiene

C1 *

hopect 30% ofIAs sepened I tubes h eseh eser 5.0.

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Namnemen to NRc pureuse to eene s o e C 2 Porterm sehen ter C 2 sesua of

$9072 $X2)of10 CFR Port to he noespone! Arelsemple Bil are C-3 l

, Addulenal 8.8. is inessetofsepobedtubes M

. C3 each 8 G sad plug select =e 5

. tees. NettresNon to NRC pwoues telt072px2)ef ic I com pen so (1) Each reper metnes a senseeres e esperate poputron ter esternunseen of esepe cepensen

. . (2) T99 hpechen of sepeted tubes may to pertermed en hees tem 1 to 4 eteem generalers tened en sidege J * ,

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