ML20217M869

Nonproprietary Rev 1 to Addendum 1 to Repair of W Series 44 & 51 SG Tubes Using Leak Tight Sleeves, Final Rept

ML20217M869
Person / Time
Site:	Prairie Island
Issue date:	08/31/1997
From:	ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY
To:
Shared Package
ML19317C664	List: ML20217M596 ML20217M619 ML20217M869
References
CEN-629-NP-ADD, CEN-629-NP-ADD01-R01, CEN-629-NP-ADD1-R1, NUDOCS 9708250344
Download: ML20217M869 (18)

Text

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C NON PROPRIETARY CEN 629 NP Addemdum 1, Rev. 01 COMBUSTION ENGINEERING, INC.

August,1997 -

Repair cf Westinghouse Series 44 and 51 Steam Generator Tubes Using Leak Tight Sleeves FINAL REPORT Combustion Engineering, Inc.

Nuclear Operations Windsor, Connecticut 9708250344 970815 .

PDR ADOCK 05000282)

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LEGAL NOTICE Tills REPORT WAS PREPARED AS AN ACCOUNT OF WORK SPONSORED BY ABB COMBUSTION ENGINEERING. NEITilER ABB COMBUSTION ENGINEERING NOR ANY PERSON ACTING ON ITS BEllALF:

A. MAKES ANY WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED INCLUDING TliB WARRANTIES OF FITNESS FOR A PARTICULAR

' PURPOSE OR MERCilANTABILITY, WIT 11 RESPECT TO TI1E ACCURACY, COMPLETENESS, OR USEFULNESS OF Ti1E INFORMATION CONTAINED IN T111S REPORT, OR PROCESS DISCLOSED IN Tills REPORT MAY NOT INFRlNGE PRIVATELY OWNED RIGliTS; OR B.

ASSUMES .iNY LIABILITIES WIT 11 RESPECT TO TiiE USE OR FOR DAMAGES RESULTING FROM Tile USE OF, ANY INFORMATION, APPARATUS, MET 110D OR PROCESS DISCLOSED IN TlilS REPORT.

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4 ABSTRACT This addendum details the assessment of steam generator tube sleeves operating under conditions outside of the bounding values originally used to assess the adequacy of this repair for installation in Westinghouse designed Series 44 and 55 steam generators.

The assessment contained herein verifles that the sleeves described in the original repoet remains an acceptable repair technique for these steam generator tubes.

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TAlll .E OF CONTENTS SECTION TITI.E PAGE

1. INTRODUCTION 1 1.1 PURPOSE 1

1.2 BACKGROUND

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1.3 REFERENCES

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2.

SUMMARY

AND CONCLUSIONS 1

3. ACCEPTANCE CRITERIA 2

4. DESIGN DESCRIPTION OF SLEEVES AND INSTALLATION 2 EQUIPMENT

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5. SLEEVE EXAMINATION 2 5.1 ULTRASONIC EXAMINATION 2 5.2 EDDY CURRENT EXAMINATION 2

6. SLEEVE TUBE CORROSION TEST PROGRAM 3

7. MECHANICAL TESTS OF SLEEVED STEAM GENERATOR 3 TUDES .

8. STRUCTURAL ANALYSIS 3 8.1

SUMMARY

AND CONCLUSIONS 3

8.2 LOADINGS CONSIDERED 6 8.3 EVALUATION FOR ALLOWABLF SLEEVE WALL 7 DEGRADATION USING REGULATORY GUIDE 1.121 8.4 EFFECT OF TUBE LOCK-UP ON SLEEVE LOADING 8 8.5 SLEEVED TUBE VIBRATION CONSIDERATIONS 9 4

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4 TABLE OF CONTENTS (cont.)

SECTION TITLE PAGE 8.6 STRUCTURAL ANALYSIS FOR NORMAL OPERATION 10 9.- SLEEVE INSTALLATION VERIFICATION 13

10. EFFECT OF SLEEVING ON OPERATION 13 e

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l. INTRODUCTION 1.1 PURPOSB The purpose of this addendum is to provide additional infonnation to support a tecimical specification change allowing installation of repair sleeves in Westinghouse designed Series 44 and 51 steam generators that have made changes in their operating parameters beyond those specified in Reference 1.3.1.

1.2 BACKGROUND

As steam generators age, increased plugging limits result in opemting parameters outside the bounds of the inp'at pammeters utilized in Reference 1.3.1.

Additionally, changes in industry requirements that alter input parameters, specifically MSLB conditions, have been incorporated. This addendum addresses these changes and the resulting differences in sleeve loadings and stress levels associated with the sleeve / tube assembly.

1.3 REFERENCES

1.3.1 CEN 629-P, Revision 01, Renair of Westinnhouse Series 44 and 51 Steam Generator Tubes Using f_nk Tinht Sleeves, Combustion Engineering Inc.,

November 1996, 1.3.2 WCAP-14790, Zion Increased Steam Generator Tube Pluzeing and Themial Design Reduction Analysis Progtmn

2.

SUMMARY

AND CONCLUSIONS The changes in operating parameters described in this addendum have only a minimal effect on the loads and stresses experienced by any of the sleeve or sleeve plug designs described in Reference 1.3.1. As such the safety factors descrilxx!

therein as described in the analysis and verified by the testing performed, still provide more than adequate margin against operating and faulted conditions.

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3. ACCEITANCE CRITERIA The conditions evaluated in conjunction with the design criteria contained in Reference 1.3.1 are as follows:

Primary Side: 596* F (operating) 2235 psig (operating) 650' F (design) 2500 psig (design)

Secondary Side 495' F (operating) 638 psig (operating) 550* F (design) 1085 psig (design)

Of the parameters described in Section 3.0 of Reference 1.3.1, only the operating conditions have been inodified, Although included here for completeness, design parameters remain as described in the referenced report.

4. DESIGN DESCRIITION OF SLEEVES AND INSTALLATION EQUIPMENT The changes in operating parameters described in Section 3 have no affect on the contents of this section of Reference 1.3.1,

5. SLEEVE EXAMINATION PROGRAM 5.1 ULTRASONIC INSPECTION The changes in operating parameters described in Section 3 have no affect on the contents of this section of Reference 1.3.1.

5.2 EDDY CURRENT EXAMINATIOF Based on the revised calculations performed in Section 8 for R.G.1,121 analysis, the eddy current testing acceptance criteria given in Section 5.2 of Reference 1,3,1 provides an adequate margin of 11.5 % (vs 12%) with respect to growth and ECT uncertainty, 2 of 13 --

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6. SLE3VE TURE CORROSION TFET PROGRAh!

The changes in operating parameters described in Section 3 have no affect on the contents of this section of Reference 1.3.1.

7. AfECilANICAL TESTS OF SLEEVED STEAh! GENERATOR TUHES The changes in operating pammeters described in Section 3 have no affect on the contents of this section of Reference 1.3.1.

8. STRUCTURAL ANALYSIS OF SLEEVE-TUBE ASSEhiHIX 8.1 SUhfMARY AND CONCLUSIONS Based on '.he analytical evaluation contained in this section and the mechanical test data contained in Reference 1.3.1, Section 7.0, it is concluded that the Full Depth Tubesheet (FDTS) and the Tube Support (TS) sleeves described meet all the requirements stipulated m Section 3.0 and 8.0 with substantial margins. This addendum highlights the calculations affected by the operating and faulted condition parameter changes found in Section 3. of this Addendum. Calculations involving design conditions remain as described in Reference 1.3.1 Section 8.0.

Only the [ 30 ) inch sleeve in the " worst" case envelopment which is not locked in the tube support will be discussed since it provided the most conservative results in Reference 1.3.1. As such the calculations in this addendum are more conservative or the same as those which would results from a complete analysis as presented in F

Reference 1.3.1 Section 8.0.

8.1.1 Design Sizing The changes in operating parameters described in Section 3 have no affect on the contents of this section of Reference 1.3.1.

8.1.2 Detailed Analysis Summary A summary of the detail analysis changes brought about by the changes in operating parameters and htSLB conditions is as described below and in Tables 81 and 8-2.

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FORMULAS FOR GENERAL MEMBRANE STRESSES SUMMARIZED IN TABLE 8-1 (Note: All Si equations below are a derivation of the formula in Par. NB.3324.1.)

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1. GENERAL PRIMARY MEMBRANE STRESS (DESIGN TUBESHEET DELTA l PRESSURE) ne changes in operating parameters described in Section 3 have no affect on the contents of this section of Reference 1.3.1.

2. MAIN STEAM LINE BREAK J

3. PRIMARY PIPE BREAK (LOCA)

The changes in opemting parameters described in Section 3 have no affect on the contents of this section of Reference 1.3.1.

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e TAllLE 81 SUSISTARY OF SI,EEVE AND WELD ANALYSIS RESULTS 5 of 13

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0 j TAHl E 8 2 4

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1 StiMM ARY OF 1.OWER JOINT (WEl,DED AND ROI,1.ED) DESIGN. ANAINSIS

_ AND TEST REStiLTS

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1 1

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8.2 LOADINGS CONSIDEkED

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j 8.2.1 Upper Sleeve Weld Pullout Load 1

In the event of a main steam line break (MSLB), the pressure differential would be 2560 psi per NRC Generic Lettcr 95-05: " Voltage Based Repair Criteria for Westinghouse

Steam Generator Tubes AtTected by Outside Diameter Stress Corrosion Cracking", Page 3 of Attachment I as applied to the Westinghouse Plants. Postulating a main steam line break (MSLB) accident, the maximum pullout load would be

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! 8.2.2 Lower Sleeve Rolled or Weld Section Pushout Load i The changes in operating parameters described in Section 3 have no affect on the contents of this section of Reference 1.3.1 I

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8.2.3 Weld FatlFue f

The contents of this pangmph in Reference 1.3.1 do not change.

8.3 EVALUATION FOR ALLOWABLE SLEEVE WALL DEGRADATION  !

USING REGULATORY GUIDE 1.121 8.3.1 Normal Opemtion Safety Margin i

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8.3.2 Postulated Pipe Rupture Accidents i

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- r L _8.3.3 Avenge Minimum Weld Height Requirements A change in the MSLB AP described in Section' 8.2.1 affects the following

, calculation for minimum weld height i  ;

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8.4 EFFECT OF TUBE LOCK UP ON SLEEVE LOADING 8.4.1 Sleeved Tube in Operating Steam Generator , Free at Tube Suppon This condition was not reanalyzed.

8.4.2 Sleeved Tube in " Worst" Case Envelopment, Free at Tube Suppon Axial __ Loads at the_ Tube Bundle Peripherv

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p 8,4.3 Sleeved Tube in Operating Steam Generator, Lock up at First Tube Support I This condition was not reanalyzed.

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8.4.4 Sleeved Tube in " Worst" Case Envelopment, l.ock up at First Tube Support I

This condition was not manalyzed. '

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8.4.5 Effect of Tube Prestmss Prior to Sleeving s.

4 The changes in openting parameters described in Section 3 have no affect on the i contents of this section of Reference 1.3.1 8.4.6 Lower Sleeve Rolled or Weld Section Pushout Due to Restrained Thennal

Expansion

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85 SLEEVED TUl3E VIllRATION RATIONS CONSIDE The changes in operating parameters d 8.6 contents of this section of Reference 131escribed e

STRL'CTURAL AnalysisA pOR NOlt\1 L OPERATION The changes in operating parameters res l i factor in forfactor a usage threegreater of the than four thecases allowed atulyzed hu t n increas 8.6.1 value of 1.0., owever, none of these increases resu Fatigue Evaluation of Upper Sleeve / T b u e Weld l

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8.6.2 Evaluation of Lower Sleeve Rolled Section The changes in opemting parameters described in Section 3 have no affect on the contents of this section of Reference 1.3.1 8.6.3 Fatigue Evaluation of Lower Stub Weld For the Lower Sleeve Weld (FDTS) summarized in Table S 1, page 8-4, of Reference 1.3.1 Primary Local Stress:

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l 8.6.4 Fatigue Evaluation of Sleeved Tube Plug Weld 1

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9. SLEEVE INSTALLATION VERIFICATION The changes in operating pammeters described in Section 3 have no affect on the contents of this section of Reference 1.3.1

10. EFFECT OF SLEEVING ON OPERATION The changes in operating parameters described in Section 3 have no affect on the contents of this section of Reference 1.3.1 13 of 13

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