ML052170055
| ML052170055 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 06/02/2005 |
| From: | Southern California Edison Co |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| M-DSC-356, Rev 1 | |
| Download: ML052170055 (18) | |
Text
{{#Wiki_filter:Attachment 1 Southern California Edison Calculation M-DSC-356, "Evaluation of Modified Pressurizer Heater Sleeves'
Southem Callfomia Edison Company CALC NO. ICCN NOJ N-3 PAGE TOTAL NO. OF INTERIM CALCULATION M-DSC-356 PRELIM. CCN NO. 1PAGES CHANGE NOTICE (ICCNY, CALCULATION CHANGE NOTICE (CCN) BASE CALC. REV. UNTl CCN CONVERSION: CALC. REV. COVER PAGE 2 3 CCN NO. CCN- 4 SU.1MARY CHANGE _ IM NO 0 YES CALCULATION suBJEcT:Evaluation of Modified Pressurizer Heater Sleeves CALCULATION CROSS-NDEX ENGINEERING SYSTEM NUMBER/PRIMARY STATION SYSTEM O-CLASS ONew/UpdatedIndexIncluded DESIGNATOR 1201 / BBB O ExistIrn Index Is Complete CONTROLLED PROGRAM OR PROGRAM/DATABASE NAME(S) VERSIONIRELEASE NO.(S) She P ram'ocedure Impact? DATABASE ACCORDING TO El ALSO. USTED BELOW S0123-XXIV-5.1 X NO 0 YES. AR No. 0 PROGRAM 0 DATABASE 1DCFR50.59/72.48 Review: AR No. 031100614__
- 1. BRIEF DESCRIPTION OF ICCN/CCN:
The purpose of this CCN Is evaluate the acceptability of the fillet weld connection between the Pressurizer heater sleeve and heater sheath using a maximum diametral gap of 0.060-. The maximum gap tolerance of 0.060 Is necessary to resolve the insertion difficulty encountered subsequent to the implementation of a half-nozzle repair of the Pressurizer sleeve. The diametral gap tolerance used in the original construction was O.045 maximum. Update Cross-Index Update Table of Contents Add Attachment Ill to the calculation This evaluation is applicable to both Units 2 & 3. 62 INITIATING DOCUMENT (ECP. OTHER) AR 031100614-3 Rev. *
- 2. OTHER AFFECTED DOCUMENTS (CHECK AS APPLiCABLE FOR CCN ONLY);
El YES [ONO OTHER AFFECTED DOCUMENTS EXISTAND ARE IDENTIFIED ON ATTACHED FORM 26-50
- 3. APPROVED BY: DISCIPLNE/ESC: DEO So P 6'~o L ORIGINATOR (Print nime s Vdate)
Cor (rAv?62 ~*j4~ FLS SiSgnatureane) Approval requires PQS T3EN64 uaon Ved________Approval requires PS T3EN64 Cualfication Verifed: In~til Nan'o/M.137Sk,/ /v<z/9 /cAft/o, IRE (Print namnIaigndate) / Approval rquire PQS 73EN6t4 OQualicatlcnverIffed: 'V?7n-e-Initial
- 4. CONVERSION TO CCN DATE SCE CDWSONGS SCE26-122-1 REV.i 4105 [
REFERENCE:
50123WtlV-7.15] Site File Copy M-DSC-356
CALCULATION CROSS-INDEX Calculation No. M-OSC-356 Sheet of INPUTS OUTPUTS Does the out- Identify output Interface Clre.put interlace caic/doc ument number and These Interfacing calculations and/or Results and conclusion of the capc/document responsible docurnents provide Input to the sject s require CCN, ECPaTCNiev., or FiS initals and calculation, and If revised may require calculation are used In these Interfacing Change? tracldng number. date revision of the subectcaLula. calculations and/or documents. CalclDocument No. Rev. No. Calc/Document No. Rev. No. YES I NO 1 C-E Report No. CENC-1420, 0 I _ Addendum 2 to the Analyticla Report for SONGS No. 2 Pressurizer m - m_ SCE 28-424 RFY. S 4d05[
REFERENCE:
50123-XXrV.7.151
ICCN NO.1 9 I PRELIM. CCN NO. N4-3 PAGE-z~-OF I ~ SERVICES. ENSInSEAJNG M~:. Fcw ONVRSION:77 Madc.btr: Date Ci:n: Calculation No.: AES-C-5212-1 ,1. L(9 Southesn Caliromia Edinon SCE No. M-DSC-356, Re. I Checked br Dnte: . P rowct No.:
Title:
Evalaulion of Modified Pressutizer Heater -5 q y , AeS 03105212-1 Q Sleeves - SONGS Units 2 and 3 Revision No.: Documeni Control No.: Sheet No.: I- 1I 6 ofl083 TABLE OF CONTENTS (CONT'D) Section Title Page APPENDIXA Heat Transfer Parameters 55 to 57 APPENDIX B - Finite Element Load Cases 59 to 60 APPENDIX C - Code Analysis Output 61 to 151 APPENDIX D - ANSYS Input Files 152 to 1083 APPENDIX I Evaluation of Heavier Replacement PZR Heater Element Assemnbly 1083Ato 1083B AITACHMENT fl - Bvaluation for Smaller Pad Size 11-1 ATTACHMENT EJ - Evaluation of Fillet Weld at the Pressurizer 'I1-I Heater Sleeve/Heater Sheath Connection I QA.E17 REV 819&
'i-D)SC-32 5 6 M-DSC-356
ATTACHMENT III ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. N-3 PAGE -+ OF { 5 CALCULATION SHEET CCN CONVERSION: Project or ECP N/A Caic No. M-DSC-356 ICCN NO. < Subject See Title Sheet Sheet of REV ORIGINATOR DATE IRE _ DATE REV ORIGINATOR DATE IRE DATE sr J. Gaor 05123/05 N. Elakily 05124105 7 12 l ATTACHMENT III - Evaluation of Fillet Weld at the Pressurizer Heater Sleeve/Heater Sheath Connection
- 1. PURPOSE The purpose of this calculation is to provide the basis for the acceptability of the fillet weld connection between the Pressurizer heater sleeve and heater sheath with a maximum diametral gap of 0.060". The maximum gap tolerance is necessary to resolve the heater insertion difficulty encountered subsequent to the implementation of a half-nozzle repair of the Pressurizer sleeve. Allowing a maximum diametral gap of 0.060" would decrease rework time and reduce total dose to the personnel due to the rework.
The maximum diametral gap of 0.045" between the heater sleeve and heater sheath was provided in the original ASME Code of Construction [6.1], which included ASME Code Case 1361-2 [6.2]. M-DSC-356
ATTACHMENT III ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. N-3 PAGE E OFI. CALCULATION SHEET CCN CONVERSION: 1 Project or ECP N/A Caic No. M-DSC-356 I CCNNO. f I Subject See Title Sheet Sheet of REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE J. Gaor
=
05/23105 N. Elakily 05/24105
= 2A
= E =0 2.0
SUMMARY
OF RESULTS The results of the evaluations, show that the use of larger diametral gap of 0.060" maximum in the fillet weld connection between the Pressurizer heater sleeve and heater sheath result in stresses and usage factor within the ASME Code Allowable limits. The results of the evaluation are presented in Section 8.0 and a summary of the stress results in the fillet weld connection is provided below. The most critical Primary Stress Intensity calculated at the fillet weld connection: Pm = 7.442 ksi < 9.78 ksi (0.6Sm) PL + Pb = 18.722 < 24.45 ksi (1.5 Sm) The maximum range of Primary plus Secondary Stress Intensity calculated at the fillet weld connection: PL + Pb + Q = 42.38 ksi < 48.9 ksi (3.OSm) The controlling fatigue stresses and Cumulative Usage Factor at the fillet weld connection for a design life of 40-year life: U = 0.40 < 1.0 M-DSC-35 6
ATTACHMENT III ICCN NO.1 E&TS DEPARTMENT PRELIM. CCN NO. N-3 PAGE 6 OF'l CALCULATION SHEET CCN CONVERSION: Project or ECP NIA I.alc No. M-DSC-356 CCN NO. I Subject See Title Sheet Sheet of REV ORIGINATOR J. Gaor DATE 05123105 IRE N. Elakily DATE 05o24105 REV ORIGINATOR DATE IRE DATE 1I9 ix 3.0 ASSUMPTIONS None required. M-DSC-35 6
ATTACHMENT III ICCN NO.1 l O E&TS DEPARTMENT I PRELIM. CCN NO. N-3 I PAGE 1 OF IS CALCULATION SHEET CCN CONVERSION: Project or ECP NIA CaIc No. M-DSC-356 ICCN NO. I/ Subject See Title Sheet Sheet of REV ORIGINATOR DATE IRE DATE REV I ORIGINATOR DATE I IRE DATE l J. Gaor 05/23105 N. Elakily 05/24105 il S IIz 4.0 DESIGN INPUT A. Original Pressurizer Sleeve: Outside Diameter, OD = 1.66" + 0.0 /- 0.002 [6.3] Inside Diameter, ID = 1.273" + 0.010 / -0.0 [6.3] Sleeve Material: SB 167 Alloy 600 [6.3] Heater Sheath Material: Type 316 Stainless Steel [6.4] Heater Sheath OD = 1.245" +/- 0.007" [6.4] r, a = mean coefficient of thermal expansion, Sm = Design Stress Intensity Value B. Replacement Pressurizer Sleeve: OD = 1.66" nom. ( to be fitted to pressurizer hole penetration ) [6.5] ID = 1.298" + 0.0 / -0.005 [6.5) Sleeve Material: SB 166 Alloy 690 [6.5] Heater Sheath OD = 1.245" +/- 0.007" [6.4] Table 4.2 - Properties of Alloy 690 r6.61 Property Temperature, F 100 200 300 400 1500 600 700 Ex 106 30.12 29.5 29.1 28.8 28.3 28.1 27.6 a, 10-6 7.8 7.8 7.9 8.0 8.1 8.2 8.3 in/in/ 0F Sm, ksi 23.3 23.3 23.3 123.3 23.3 23.3 1 23.3 Note: The original ASME Code did not list Alloy 690 but was later specified in ASME Code Case 474. For Alloy 690, the values above are from the ASME Code 1998 Edition, 2000 Addenda [6.6], which were previously specified in Code Case 474-2 (code case was annulled and Alloy 690 was included in the ASME Code 1999 Addenda). M-DSC-3 56
ATTACHMENT III l ICCN NOJ N N E&TS DEPARTMENT PRELIM. CCN NO. N-3 PAGE J-OI5 CALCULATION SHEET lCCN CONERSION: Project or ECP NIA CaIc No. M-DSC-356 ICCN NO. I Subject See Title Sheet Sheet of REV ORIGINATOR DATE IRE DATE l REV I ORIGINATOR DATE IRE DATE ox J.Gaor 05/23105 N. Elakily 05124/05 l l 2 Cz C. Hcater Sheath Material: Type 316 Stainless Steel [6.4] . Note: Sheath material remains unchanged. Table 4.1 - Properties of Type 316 Stainless Steel [6.11 Property Temper ature, 'F 100 200 300 400 500 600 700 Ex 106 28.2 27.7 27.1 26.6 26.1 25.4 24.8 psi a, 1O6 9.16 9.34 9.47 9.59 9.70 9.82 9.93 in/in/OF I I I Sm, ksi 20.0 20.0 20.0 19.2 17.9 17.0 16.3 M-DSC-3 56
ATTACHMENT III l ICCN NOJ N 3O E&TS DEPARTMENT, PRELIM. CON NO. N-3 PAGE OFI J CALCULATION SHEET CCN CONVERSION: Project or ECP NIA Calc No. M-DSC-356 CCN NO. I Subject See Title Sheet Sheet of REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE Cl J. Gaor 05/23/05 N. Elakily 05124/05 2 I I = 5.0 METHOD OF EVALUATION The fillet weld between the Pressurizer heater sleeve and the heater sheath will be evaluated using the same methodology as the original Combustion Engineering (CE) Stress Report [6.7]. The loads and weld cross sectional properties are modified by the ratio of the new diametral and the original diametral gap. The results of the evaluation will demonstrate compliance with the original ASME Code stress requirements for Class 1 components [6.1]. The original fillet weld connection between the Pressurizer heater sleeve and heater sheath was constructed in accordance with Code Case 1361-2 which required a maximum of 0.045" diarhetral gap between connecting parts. The 0.045" maximum diametral gap limits the deflection of the part inside the penetration thereby limiting the bending stresses that can be imposed on the fillet weld. M-DSC-3 56
ATTACHMENT III l ICCN NOJ l lO-1 E&TS DEPARTMENT IPRELIM. CCN NO. N.3 I PAGEI JQF CALCULATION SHEET CCN CONVERSION: Project or ECP N/A Calc No. M-DSC-356 I CCN NO./ l Subject Se e Title Sheet Sheet of REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE _ J. Gaor 051231o5 N. Elakily 05/24/05 2 Z
= * = ?
6.0 REFERENCES
- 1. ASME BPVC Section III Code, Rules for Construction of Nuclear Power Plant Components, 1971 Edition, 1971 Summer Addenda.
- 2. ASME Code Case 1361-2, Socket Welds, Section III.
- 3. S023-919-33 Rev. 2, Internal Details for SONGS Unit 2 Pressurizer
- 4. S023-919-2-D58 Rev. 1, Heater Element Assembly
- 5. Drawing No. 41116 Sh. 2 Rev. 3, Primary System Instrument Nozzle Details
- 6. ASME BPVC Section III Code, Rules for Construction of Nuclear Power Plant Components, 1998 Edition through 2000 Addenda.
- 7. C-E Report No. CENC-1420, Addendum 2 to the Analytical Report for SONGS Unit. No. 2 Pressurizer M-DSC-3 56
A1TACHMENT III l ICCN NOJ l E&TS DEPARTMENT l PRELIM. CCN NO. N-3 I PAGE -Il OFl CALCULATION SHEET [CCN CONVERSION Calc No. M-DSC-356 CCN NO. I Project or ECP NIA Subject See Title Sheet Sheet of REV ORIGINATOR DATE IRE DATE REV ORIGINATOR l DATE IRE DATE J. Gaor 05123105 N. Elakily 05_24/05 EJ, 7.0 NOMENCLATURE Terms used are as defined in the body of the calculation. M-DSC-3 56
ATTACHMENT III ICCNN N- N PAGE O E&TS DEPARTMENT 1PRELIM. CCN NO. N-3 PAG_" 1 F/ CALCULATION SHEET I CCN CONVERSION: Project or ECP NIA I-alc No. M-DSC-356 CCN NO. 1I Subject See Title Sheet Sheet of REV ORIGINATOR DATE I IRE DATE REV ORIGINATOR DATE IRE DATE l r J. Gaor 05123/05 lN. Elakily 05/24/05 l l I -M 8.0 CALCULATIONS The original C-E Analytical Report [6.1] evaluated the sleeve to sheath fillet weld for Primary Membrane (Pm), Primary + Secondary (PL + Pb + Q), Shear (r) and Fatigue Usage Factor. The new 3/16" fillet weld size has a throat which is reduced from that originally evaluated due to the increase in gap between the heater sleeve and heater sheath. The increase in gap also increases the stress due to the internal pressure. See Figure 8-1 for the schematic configuration of the heatersleeve to heater sheath fillet weld connection. The throat of the fillet weld evaluated in the original C-E Analytical Report was 0.1227". For the new configuration, the weld throat is calculated as follows: throat size= (0.619 + 0.1875 - 0.649) X 0.707= 0.111", where: outside radius of heater sheath = 1.238 /2 = 0.619" (min. radius) inner radius of heater sleeve = 1.298 / 2 = 0.649" (max. radius) fillet weld size= 0.1875". The applied axial force due to internal pressure is 3.182 kips. The new applied axial force due to internal pressure becomes, F = 3.14 X (0.649) 2 X 2500 = 3.306 kips For the Primary Stress Intensity evaluation , Pm, the new stress is calculated by multiplying the original Pm by the ratio of the increase in Force and by the decrease in the throat size of the fillet weld. The original Pm = 6.48 ksi, thus, the new Pm is, Pm = 6.48 X (3.306 / 3.182) X (0.1227 / 0.111) = 7.442 ksi, which is less than the allowable of 9.78 ksi ( 0.6 Sm for SS Type 316 at 700 'F) Therefore, the Primary Stress Intensity criteria is satisfied. Primary membrane + bending stresses (PL + Pb) were not explicitly calculated in the original C-E Analytical Report since there were no primary bending loads on the fillet weld due to the close tolerance between the sleeve and the sheath. For conservatism, the maximum bending loads calculated under seismic and pressure pulsation loadings will be included in this evaluation. The maximum bending stress per the original report is 11.28 ksi, (PL + Pb) = 7.442 + 11.28 = 18.722 ksi < 24.45 ksi (1.5 Sm) for SS Type 316 M-DSC-35 6
ATTACHMENT IlIl E&TS DEPARTMENT ICCN NOJ / IPRELIM. CON NO. N-3 _ I IPAGE_~OF /L2 CALCULATION SHEET l CCN CONVERSION: Project or ECP NJA Calc No. M-DSC-356 CCN NO. I Subject See Title Sheet Sheet of REV ORIGINATOR DATE IRE l DATE l REV I ORIGINATOR DATE IRE DATE J. Gaor 05123105 L N. Elakily 5124/05 l l l IILI I I II CZ To calculate the new stress, conservatively, the throat factor will be squared to account for bending across the throat as opposed to pure shear, (PL+ Pb) = 18.722X (3.306/3.182) X (0.1227/0.111)2
= 23.77 ksi < 24.45 ksi (1.5 Sm) for SS Type 316.
Therefore, the Primary membrane + bending stress intensity criteria is satisfied. For the Primary + Secondary Stress Intensity evaluation, the maximum stress intensity calculated in the heater sleeve to sheath weld is 30.35 ksi as shown in the original C-E report. The thermal stresses are directly proportional to the modulus of elasticity times the coefficient of thermal expansion of the material being welded. The comparison of E times ax of the materials is shown below: Property Temperature, VF 100 200 300 400 500 600 700 E a (Alloy 226.8 228.7 230.6 231.0 230.9 230.7 228.8 600) E ca (Alloy 235 230.1 229.9 230.4 229.2 230.4 229.1 690) . Ea (SS 258.3 258.7 256.6 255.1 253.2 249.4 246.3 Type 316) _ _ ___ __ __ The increase in thermal stress is estimated by using the equation below assuming that the weld stress is proportional to the differential expansion between the heater sleeve and the heater sheath. a /00 = [ (E. a. - E690 X690) / (Ess ass- E600 Ct600) I where: a = new stress, o. = original stress Substituting the values in the equation above, at different temperatures, the ratio of c; / cO is tabulated below: _ -Temperature, OF Property 100 l 200 l_ 1300 l 400 l500 l 600 l 700 0 / C(, 0.74 10.95 1.03 11.02 11.08 11.02 1 0.98-Based on the above, the increase in thermal stress when using Alloy 690 sleeve In lieu of the original Alloy 600 sleeve is less than 10%. For conservatism, the stress due to pressure plus thermal stress will be Increased by 10%. M-DSC-3 56
ATTACHMENT III E&TS DEPARTMENT ICCN NOJ PRELIM. CCN NO. N-3 I PAGE J IIOF I CALCULATION SHEET I CCN CONVERSION: l Project or ECP N/A Calc No. M-DSC-356 ICCN NO. l I7 Subject See Title Sheet Sheet of REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE Q J. Gaor 05/23/05 N. Elakily 05124105 iZ O
= =
The new Primary + Secondary Stress Intensity is, (PL+Pb+Q)=30.35X 1.10X(3.306/3.182)X( 0.1227/0.111) 2
= 42.38 ksi < 48.9 ksi (3.0 Sm)
Therefore, Primary + Secondary stress intensity criteria is satisfied. For the Primary + Secondary + Peak Stress Intensity evaluation, the maximum stress intensity calculated in the heater sleeve to sheath weld is 141.75 ksi using a conservative stress concentration factor of 5.0 as shown in the original C-E report. (Note: the minimum stress concentration factor for fillet welds to be used for fatigue analysis as given in Code Case 1361-2 is 4.0). Using the above ratio for the (PL + Pb + Q), with a pressure increase factor for the trip transient of (2.55 / 2.50), the new Primary + Secondary + Peak Stress Intensity is, (PL+ Pb + Q +F) = 141.75 X (2.55 12.50) X 1.10 X (3.30613.182) X (0.1227/0.111)2
= 201.91 ksi The allowable number of cycles for alternating stress of 101 ksi is approximately 1750 cycles.
For 700 cycles, considering a 40 year design life, the cumulative usage factor may be bounded by (700 / 1750), or 0.40, which is less than the allowable usage factor of 1.0. M-DSC-3 56
NUCLERR REG AFFRIRS Fax:949-368-7575 Rug 2 '05 12:08 P.02 ATTACHMENT III lICCN NOJ AGE CL5'O 1 E&TS DEPARTMENT PRELIM. CCN NO. N-S l PAGE__-OF .. CALCULATION SHEET CCN CONVERSION: N/A Cakc No. M-DSC-356 ICCN NO. f Project or ECP Subject See Title Sheet Shoet of REV ORIGINATOR DATE I IRE REV ORIGINATOR J. Gaor I DATE 23I06 IRE N. Elskiy DATE IOW4105 I I = A r Gap
-1 H-Heater sleeve Alloy 690 I
Il t 3/16' r-. Heater Sheath, SS 316 V Fiqure 8.1 Schemaic of theheater sleeve to heater sheath fillet weld connection -DSC,3 5 6
Attachment 2 Figure "Typical Heater Arrangement"
5/8" PLATE X- TOP & BOTTOM HEATER SUPPORT PLATES
-IF INSIDE L5/8" PLATE I
REMNANT OF EXISTING SLEEVE, ALLOY 600 PRESSURIZER WALL I OUTSIDE
"-TEMPERBEAD WELD PAD WITH J-GROOVE WELDS
-NEW HEATER SLEEVE, ALLOY 690 I.D. = 1.298" (max)
(NEW HEATER SLEEVE I.D.) 1.298" F mi -HEATER SHEATH, II SS 316 I I O.D. = 1.245" (NOMINAL) p = 1.238" (MINIMUM) N 3/16/ HEATER ARRANGEMENT (HEATER SHEATH O.D.) 1.245" (SCHEMATIC) NOMINAL DIAMETRAL CLEARANCE MAXIMUM DIAMETRAL CLEARANCE = (1.298" - 1.245") = 0.053" = (1.298" - 1.238") = 0.060" = cMAX cMAX = 0.060" REQUESTED}}