ML18228A455

02/03/1978 Letter Enclosed Summary Cover Sheet & Summary for Fpl'S Program on Steam Generator Repair and the Influence of Water Chemistry

ML18228A455
Person / Time
Site:	Turkey Point
Issue date:	02/03/1978
From:	Paduano H Florida Power & Light Co
To:	Broido J American Nuclear Society (ANS), Office of Nuclear Reactor Regulation
References
Download: ML18228A455 (10)

Text

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS>

DISTRIBUTION FOR INCOMING MATERIAL 50-250 REC'ROIDO J H ORG: LEAR 6 DOCDATE: 02/03/78 AMER NUC SOC FL PWR 5 LIGHT DATE RCVD: 02/07/78 DOCTYPE: LETTER NOTARIZED: NO COPIES RECEIVED

SUBJECT:

LTR i ENCL i

SUMMARY

COVER SHEET 8.

SUMMARY

FOR A PAPER DESCRIBING FLORIDA POWERS PROGRAM FOR STEAM GENERATOR RFPA1R 5 THE INFLUENCE OF WATER CHEMISTRY.

PLAMT NAME: TURKEY POINT UNIT 3 REVIEWER INITIAL: XRL DISTRIBUTOR INITIAL:

DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS GENERAL DISTRIBUTION FOR AFTER ISSUANCE OF OPERATING LICENSE.

<DISTRIBUTION CODE A00i)

FOR ACTION: BRANCH CH F R4+W/7 ENCL IMTERNAL: REG FILE~<W/E NRC PDR4+W/ENCL

• NCL OELD++LTR ONLY HAMAUER~~W/ENCL CHECK+4W/ENCL EI SENHUT++W/ENCL SHAO++W/ENCL BAER~~W/ENCL BUTLER4+W/ENCL GR IMES+~W/ENCL J. COLL INS++W/ENCL J. MCGOUGH++W/ENCL EXTERNAL: LPDR S MIAMI FL+ >W/ENCL T I C+4 W/ENCL NSIC++W/ENCL ACRS CAT B++W/16 ENCL DlSTRIBUT10M: LTR 40 EMCL 39 CONTROL NBR: 7803900i7 SIZE: iP+4P

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Fe ray3,1978 PRN-SP-78-014 File gpss

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Mr.

ANS Attn:

Jeffrey H. Broido Technical Program Chairman "~ ~ Q~IOK5

~~ggISSIDII g+g 5odl5i Ruth Farmakes American Nuclear Society 555 North Kensington Avenue LaGrange Park, Illinois 60525

Dear Mr. Broido:

Enclosed are four copies of the Summary Cover Sheet and Summary for a paper describing Florida Power 8 Light Company's program for steam generator repair and the influence of water chemistry.

If the paper is accepted for presentation, please forward your invoice for page charges to me.

Very truly yours, Power Resources-Section Supervisor HNP:dt Enclosure cc: Mr. George Lear, Chief Operating Reactors Branch No. 3, DOR Division of Reactor Licensing U. S. Nuclear Regulatory Commission Washington, D. C. 20555 7p03~0 PEOPLE... SERVING PEOPLE

SUbJIsVSFIV COVFR SII-IFFY I

a CONTRIBUTED PAPER 'NVITEDPAPER, X s I ORIG}iiIALAND THREE COPIES REQUIRED TURKEY POINT STEAN GENERATOR REP I AUTHOR(S): (List authors in the proper order and exactly as they are to be published. PLACE AN ASTERISK AFTER EACH AUTHOR FVHO IS AN ANS MEMBER; AN "S" AFTER STUDENT AUTHOR,)

H. N. Paduano

• R.,J. Acosta

• 3 A. J. Gould

• AFFILIATION(S):(L'ist corresponding author's affiliation and complete mailing address.)

I. Florida Power 5 Light Co., Power Res'ources Dept., P.O. Box 529100, Miami, Fl.33152 II II

2. II II ' Il II 3 . ~

Indicare a~bee of anchor ro whom correspondence should be addressed 1 and rumple(e page 4 To whom should the page charge be billed? H. N. Paduano Preferred: Attach purchase order with appropriate purchase order number to original copy of the summary.

FOR CONTRIBUTED SUibfMARY:

I, Identify ANS Division or Technical Group having cognizance of your subject In which subject category (from page 3) do you feel this summary belongs?

Alternative Category:

Has the substance of this summary been presented or published previously (including U.S: ERDA or equivalent reports)?

YES, NO . Give details Has the paper been submitted for publication in a technical journal?

YES NO Give details klave you presented related papers?

YES NO Give details kIas this summary been approved for publication by your institution or company?

YES NO .'Give details FOR INVITED

SUMMARY

%which ANS Division or Technical Group invited you?

Person'who invited you Nr. Thomas J. Pashos Session No.

FOR CONTRIBUTED OR INVITED

SUMMARY

Number of: Pages Tables Figures Word Conor Tear 050+ frslo. of figures plus tables) x 150 + (No. of lines ofequarions x 10)

Tote 55O Original line drawings or glossy black-and-white prints of each figure must be attached to original.

A COMPLETED

SUMMARY

COVER SHEET, TOGETHER XVITH THE INFORMATION REQUESTED ON PAGE 4, MUST BE ATTACHED TO EACH OF THE FOUR SETS OF TPIE

SUMMARY

. Please have copies made to complete your four sets.

S il

'I FILING AND NAILINGINFORMAfION Name and full mailing address of auchor LOG 8 to whom correspondence should be sent. (leave blank)

(Type or print legibly - form used for mailing.)

MR. H. N. PADUANO FLORIDA POWER 8t LIGHT COMPANY POWER RESOURCES DEPARTMENT P. 0. BOX 529100 h " '305)552-3798 MIAMI, FLORIDA 33152 Commercial:

Title of Summary TURKEY POINT STEAM GENERATOR REPAIR AND INFLUENCE OF WATER CHEMISTRY k ~

"v This is to acknowledge receipc of your summary. Please use the log number above in future correspondence.

This summary will be considered for inclusion in the program of the American Nuclear Society's 1978 Annual Meeting, San Diego, CA, June 18 - 23, 1978. Another copy of chis form will be sent to you abouc March 4, 1978 informing you of the Program Committee action.

74 E

Your paper has been reviewed and:

0 l. Accepted for presentation at the 1978 Annual Meeting. (See Atcached In-0 3. It is suggested that your summary be combined with the summary refer-structions) enced as Log 4 (See Ac-I tachmen t) 0 2. Ic is suggested that your summary be revised. (See Attachment) Q 4. Rejected. (See Attached Comments)

In all correspondence regarding your summary, please refer to the Log Number shown above.

Thank you for submitting this summary.

Sincerely, Jeffrey H. Broido ANS Technical Program Chairman 1978 Annual Meeting

Turkey Point Steam Generator Repair and Influence of ~Jater Chemistr By H. N. Paduano, R. J. Acosta, and A. J. Gould Due to the progression of steam generator 'tube denting in the Turkey Point steam

. generators, FPL made the decision to begin a program aimed at repai ring the steam generators. The program included evaluation of 'various repair alternatives, including retubing of the steam generators'n place. The evaluation concluded that a replacement of the lower assembly (primary channel head plus tube bundle and secondary shell) was the best alternative. Such a repair was evaluated to offer the least construction process uncertainties, the shortest estimated outage time, and also enabled the repaired steam generator to incorporate all of the latest design improvements.

The repaired steam generators will have the following improvements:

a) thermally treated inconel tubes b) stainless steel broached tube support plates c) full depth expansion of tubes into the tribe sheet d) increased recirculation ratio e) improved blowdown design f) improved moisture separation equipment g) capability for wet layup recirculation h) improved access for secondary side inspections Along wi th the steam oenerator repair program, FPL- also has a program aimed at improved "water chemistry" for the steam generators and feedwater cycle, As a part of this program, FPL is investigating systems that will be designed to address problems associated with sludge, copper, chloride, oxygen, and other contaminants. Consideration is being given to shutdown and startup as well as normal operating modes. Areas under investigation include a feedwater recircu-lation cleanup system, magnetic filtration of the main feedwater, retubing of the main feedwater heaters with stainless steel, and deaeration of the condensate storage tank.

Also included in the program is the most important effort to obtain a leak free main condenser. In this regard, FPL believes that titanium tubing provides the greatest assurance for eliminating leakage and has already retubed three out of the eight waterboxes at Turkey Point Unit Nos. 3 and 4 with titanium. The experience thus far, after about two years of operati on has been excellent.

While the exact schedule for repair of the steam generators is not finalized, it is possible that it could begin during the first quarter of 1979 on Turkey Point ll implement a water Unit 4. Following the repair, Florida Power 5 Light Company wi

chemistry program which closely. follows the latest recommendations of the NSSS ven'dor'.'resently, it is anticipated that an All Volatile -Treatment (AVT) program will be utilized with major emphasis on limiting operation outside .the specified normal chemistry, limits. The water chemistry program will be designed to provi de increased protection of the repaired steam generator. The operating limits are expected to be very stringent, thus requiring procedural and equipment modifications, such as discussed above, to enable desired unit performance.

In summary, FPL has implemente'd a repair program that will result in improved steam generators. Along with the repair effort, a compa'nion program whose aim is for increased protection of the steam generators through improved water chemistry has also been initiated. Through these programs, FPL 'intends to ensure continued, safe, and reliable operation of the Turkey Point nuclear units.

P. ~ ~

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