ML13329A425
| ML13329A425 | |
| Person / Time | |
|---|---|
| Site: | Indian Point  |
| Issue date: | 10/30/2013 |
| From: | Lo K Entergy Nuclear Operations |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML13329A422 | List: |
| References | |
| NL-13-147 IP-CALC-13-00070, Rev 1 | |
| Download: ML13329A425 (15) | |
Text
ENCLOSURE 2 TO NL-13-147 IP-CALC-13-00070, RILEAK REPAIR CLAMP EVALUATION FOR LINE 1093 IN32 MAIN TRANSFORMER MOATENTERGY NUCLEAR OPERATIONS, INC.INDIAN POINT NUCLEAR GENERATING UNIT NO. 3DOCKET NO. 50-286 1.0 ENGINEERING CALCULATION COVER PAGESheet I of 2El AND-1 E] ANO-2 El GGNS 0l IP-2 El IP-3 El PLPCQ JAF F1 PNPS ] RBS [] VY [1 W3El NP-GGNS-3 El NP-RBS-3CALCULATION
(') EC # 47124 (2)Page I of 5COVER PAGE(3) Design Basis Calc. [l YES Z NO (4) Z CALCULATION E" EC Markup(5) Calculation No: IP-CALC-13-00070
.(6"Revision:
I(7) Title: Leak Repair Clamp Evaluation for Line 1093 in 32 Main Transformer
_01 Editorial Moat [I YES ONO(' System(s):
SW Review Org (Department):
Civil/Structural (11) Safety Class: (12) Component/Equipment/Structure Type/Number:___________
[ Safety I Quality Related 32 /man ra32 Main Transformer El Augmented Quality Program MoatE- Non-Safety Related113) Document Type: CALC(14) Keywords (Description/Topical Codes):_'_ REVIEWS(,s) Name/Signature/Daten (16) Name/Si nature/Date (7) Name/ n nr tr/MtKai Lo 10-30-2013/
G. BhalIa. R. DrakeResponsible Engineer
[ Design Verifier l Supesor/Alproval
] Reviewer__ Comments Attached
[i Comments Attached3EN-DC-126 REV 4 2.0CALCULATION REFERENCE SHEETPage 2 of 5CALCULATION CALCULATION NO: IP-CALC-13-00070 REFERENCE SHEET REVISION:
1I. EC Markups Incorporated (N/A to NP calculations)
NoneI1. Relationships:
Sht Rev Input Output Impact TrackingDoc Doc Y/N No.1. 0 0.2. 0 0III. CROSS
REFERENCES:
- 1. IP3 Piping Specification, TS-MS-027
- 2. USAS B31.1, Power Piping Code, 1967 edition3. Drawing 9321-22363 (Piping)4. IP3-UT-13-058
- 5. ANVIL Catalog6. CR-IP3-2013-04174
- 8. IP3-VT-13-021 IV. SOFTWARE USED:Title: Version/Release:
Disk/CD No.V. DISK/CDS INCLUDED:
Title: Version/Release Disk/CD No.VI. OTHER CHANGES:
NoneEN-DC-126 REV 4 3.0Rmono OF REVIS(ONPage 3 of 5lRelwsion, Oi. bi: Rodf Revis'ion' Initial issue.0Revised calculation due new flaw lengthEN-DC-126 REV 4 4.0 TABLE OF CONTENTS PAGE 4 OF 512345678910Calculation Cover Page ..................................................................
Calculation Reference Sheet ..................................................................
Record of Revisions Table of ContentsPurpose ..................................................................
Conclusion
.......................................
......................
Input and Design Criteria
..................................................................
Assumptions
...................................................................
Method of Analysis
..................................................................
Calculation
...................................................................
Attachment 1: Calculation (2 pages)Attachment II: Miscellaneous reference material used for calculation (6 page)Total number of pages: 15Pacie No.1234555555EN-DC-126 REV 4 Page 5 of 55.0 PurposeIn the moat of the 32 transformer yard, an area was identified of missing metal of the pipe wall thickness due toexternal surface corrosion.
The degraded pipe location is in the ISI Class 3 code boundary (See CR-IP3-2013-04174). CC-N-513-3 was invoked and the degraded piping is structurally adequate.
A red rubber patch will beplaced on the defective pipe surface held tight to prevent any potential water leakage by means of a pipe damp.The following pipe stress evaluation is needed due to the addition of the pipe damp and the large flaw size:1. The additional weight of the clamp on the pipe stress.2. The clamping pressure acting on the pipe.3. Ensure the compressive clamping pressure is greater than the pipe's design pressure to prevent waterfrom leaking out.6.0 Conclusion The additional weight of the pipe damp onto the piping will result in insignificant increase of pipe stress. Basedon the VT report, a 12"x6" red rubber pad, 1/4" for the thickness of the rubber pad, and 1116" maximumcompressive deformation of the rubber pad, the compressive pipe membrane stress will be below the allowable stress limit. The compressive pressure is greater than the pipe's design pressure and water cannot leak out.7.0 Input and Design Criteria1. Piping material:
A53 Gr B, schedule 40 per specification TS-MS-027
- 2. Allowable pipe stress and piping code: St = 15 ksi, B31.1 Power Piping Code, 1967 edition3. An average Durometer hardness of 70 for red rubber material.
- 4. 8" wide pipe clamp from Figure 432 of ANVIL catalog.8.0 Assumptions
- 1. Actual weight of the pipe clamp is less than 18 Ibs, but 25 lbs is used conservatively.
- 2. Fig. 432 pipe guide is used as a clamp.3. A 12" x 6" red rubber pad is a placed at the defective externally corroded area.4. The thickness of the red rubber is 1/4".5. 1/16" compression of the red rubber pad is allowed to limit the compressive stress on the pipe.9.0 Method of analysisThe stress of the pipe induced by the damping force is evaluated using case 17 from table 30 of Roark's"Formulas of Stress and Strain".10.0 Calculation See Attachment IEN-DC-126 REV 4 Attachment ICalculation EN-DC- 126 REV 4 IP-CALC-13-00070 Rev. 0 PageDetermine the additional bending stress induced by the additional pipe clampW = weight of clamp = 25 lb (cons)p = design pressure=
i.150 psid = outside diameter
- 10.75 int= nominal wall thickness
0.365, inS section modulus = 29.9 :1in3L=pipespan
8 ::::ft= 96 inSh = allowable stress 15000.. psiConservatively consider the pipe is pinned at support endsMa = moment due to OW = WLJ4 = 600 in-lbfb = bending stress = MaJS = 20 psifb/Sh = ratio of additional stress to the allow limit = 0.13% negligible Determine the compressive stress induced by the clamping forceSA= Durometer Shore A hardness of red rubber -.70log E = 0.0235SA -06403 = 1.0047E = modulus of elasticity
= 10.11 MPA = 1466 psiw = width of ruber pad axially = 6.0 inI bearing length circumferentially
= 12.0 inV = thickness of red rubber pad = ,0.25:ý,..
in5 deformation due to compression
= 0.0625 inA' = defective surface area externally corroded
= 2.5"(8.25")
= 19.0 in2A = area of pad being compressed
= wl -A' = 53.00 in2P compressive force acting on the rubber pad = 8AE/t' = 19427 lbUsing the case 17 from Table 30 of Roark's "Formulas of Stresses and Strain"v = poisson ratio 0.3E = modulus of elasticity
2.79E+07 psiR = mean pipe radius = 0.5(d -t) = 5.1925 in= (3(1-v )/(R t2]O = 0.934 in"D = Et3/112(1-v)]
124240 in-lbThe external uniform compressive pressure will be offset by the 150 psi internal pressureq = external uniform pressure
P/A -p = 217 psia = w/2 3.0 inXa= 2801At x = 0, Max M
2.52ar'1 m meridional bending stress = -6M/t2 = -113 psi < Sh = 15000 psi, o.k.2'z = circumferential bending stress = va'= -34 psiAt x = 0, Max y = (-q/4DK4)[1 -e(Ka)cos(Xa)
= -0.0006 inC02 = circumferential membrane stress = yE/R + va1 = -3291 psi < Sh = 15000 psiSince external clamping pressure is compressive, greater than the pipe's design pressure, water will not leak out.The minimum wall thickness required for the pipe's hoop stress is 0.054" per IP3-CALC-13-00062.
The thickness of the pipe clamp is 3/16", more than adequate to hold the pipe pressure.
/ Of2 Attachment IIMiscellaneous Reference Information EN-DC-126 REV 4
____ Visual Exam-EntergySitelUnit; IP3 1 3Summary No.: SW Line 1093Workscope:
BOPof Equipment and Components (VT-3)Procedure:
Procedure Rev.:Work Order No.:CEP-NDE-0903 500350692-31 Outage No.: N/AReport No.: lP3-VT-13-021 Page: 1 of ICode: ANSI B31.1, 67 -69 ED Cat./Ittem:
NIA Location:
Unit #3 Moat Excavation.
Drawing No.: 9321-F-22363
==
Description:==
Visually Examine 10" Line #1093 After Removal of Support.System ID: Service WaterComponent ID: 10" SW Line 41093Limitations:
Limited Room on the Bottom Side of the Pipe.Resolution:
0.105" Character Card Surface Condition:
In ServiceLight Meter Mfg.: NIA Serial No.: NIA Illumination:
SATLight Verification Times: Cal In E NIA I NIA NIA Cal Out [3 N/AVisual EquipmenrlAids:
Flashlight, Mirror, Camera, Tape MeasureLo Location:
Top of Pipe Wo Location:
Centerline of the eroded areaVisual Examination:
DirectComments:
Further Examination of Line No, 1093 revealed that the corroded area originally found extended underneath the pipe to thearea that was resting on the wood support.
Area measures 8-1/4" circumferentlally and 2" wide in the axial direction.
Results:
Accept Reject [ Info )ý Ref CR-)P3,2013-04416 and IP3-UT-13-058 Percent Of Coverage Obtained
> 90%: NIA Reviewed Previous Data: YesExaminer Level II Date Reviewer Signature DatePeterson, Joseph F. 1012912013
-m,,'tIV/,I Exmlr Leve Sgatr Date S ~ew A a rDateOther Level Signature Date ANII Review .'..nature tA ____A go, EntergySupplemental ReportReport No.: IP3-UT-13-058 Page: 7 of 7Summary No.: 10" Line # 1093Examiner.
Allen, Robert E.Examiner:
NIAOther: WA0 L. Level: fi EOLevel: NIALevel: NIAReviewer X)Site Review:ANII Revlei -Date:Date:Comments:
Area 3 UTT and pit gage readings.
Sketch or Photo: \\Client\Y$MtddeaI Ver 81JddealServerUDDEAL_lP3\Graphics-Pictures\Service Water10 In Line 1093 Area 3.TIFt'4 eel-Aj,-z,:50qPX7-I 'Z-womLVr- 4ý A&6 *UA0(h-VA CP fIq PACM14 '.--A- I ASAeZ- "A-Soo"6 : ;7L1/4 " fI IkZ~L~'(I;-4. 1-z.I I, I] /,tlib
-Enterloy Visual Exam of Equipment and Components (VT-3)Site/Unit:
IP3 / 3Summary No.: SW Line 1093Workscope:
BOPProcedure:
CEP-NDE-0903 Procedure Rev.: 5Work Order No.: 00350692-31 Outage No.: N/AReport No.: IP3-VT-13-021 Page: 1 of 1Code: ANSI B3i.1, 67 -69 ED Cat./Item:
NIA Location:
Unit #3 Moat Excavation.
Drawing No.: 9321-F-22363
==
Description:==
Visually Examine 10" Line #1093 After Removal of Support.System ID: Service WaterComponent ID: 10" SW Line #1093Limitations:
Limited Room on the Bottom Side of the Pipe.Resolution:
0.105" Character Card Surface Condition:
In ServiceLight Meter Mfg.: N/A Serial No.: N/A Illumination:
SATLight Verification Times: Cal In [] N/A I N/A / NIA Cal Out U N/AVisual Equipment/Aids:
Flashlight, Mirror, Camera, Tape MeasureLo Location:
Top of Pipe Wo Location:
Centerline of the eroded areaVisual Examination:
DirectLoc Loc Loc Ind. Size RemarksL W U/D R/L D/L8.5" 0" N/A Linear 8.25" x 2" See comments below, the remainder of the exposed pipe_was in good condition with no corrosion 1- +
- I1- *1~ I I-r i- t t+ + + I IComments:
Further Examination of Line No. 1093 revealed that the corroded area originally found extended underneath the pipe to thearea that was resting on the wood support.
Area measures 8-1/4" circumferentially and 2" wide in the axial direction.
Results:
Accept I Reject [ Info i.-] Ref CR-1P3-2013-04416 and IP3-UT-13-058 Percent Of Coverage Obtained
> 90%: N/AReviewed Previous Data:YesExaminer Level 1 S Date Reviewer Signature DatePeterson, Joseph F. 10/29/2013
,d,Examiner Level Signature Date eviewDate Other Level Signature Date ANII Review IZ-,11IFig. 432Size Range: 2 through 24"Material Carbon steelFinisAr Plain or Galvanized Maximum Temperature.
Plain 750V F, Galvanized 450 Ffor carbon steel pipe onlyService:
Usedowith and where pipe slides cannot be weldeddirectly to pipe or copper tube. When used with fiberglass,
- plastic, or aluminum pipe, a thin protective liner should beinserted between the pipe and the clamp. Clamp is designedfor use with Figure 257 and Figures 436 and 439 slides and tees.Ordering.
Specify figure number, pipe size, name and finish.Special Clamp", ItýFig. 257w/Fig 432 Clampw/Rg 3 lapFig. 439w/Fig 432 Clamp"4_FIG. 432: WEIGHT (LBS)
- DIMENSIONS (IN)Pipe Size L M N P Q T Weight2 5 4 22h 5'h 4h 33 6 5 3Th61 5h A4 / 44 7 6 45 8 7 .... .. 56 95A 8% 128 11% 101A 1510 13A 12% 6 1812 15YA 143 2114 17'A 16'h 1h 4116 19' 18'h 4618 12 21'A/ 201h 8 1/ 5220 23A 22'A 5724 281A _ _. ... 261h ..... _ _ 6741APJAL:U What is Rubber Hardness?
The hardness of rubber compounds Is measured by the Shore A durometer, the higher thedurometer, the harder the compound.
70-durometer hardness should be used wheneverpossible as it offers the best combination of properties for most O-Rings applications.
Softer compounds stretch easier and sealbetter on rough surfaces.
Hardercompounds offer greater abrasionresistance and resistance to extrusion.
Extrusion must always be considered where high pressure is used. The properhardness may be selected from this chartby matching the fluid pressure with themaximum extrusion gap.60 Shore A is softer than 70.F1daDurometr Chart-Co, JAMu~~ =Ai70 Shore A is the standard.
90 Shore A is very stiff.ripa"i-Si;(It"I e*.2 @0.00.04IazMUMn Cp, in hChThe hardness of an elastomer is measured based on the depth of Indentation by a standard sizeand shape impacting gauge. The hardness Is obtained by comparing the difference between asmall initial force and a much larger final force. The International Rubber Hardness Degrees (IRHO)scale has a range. of 0 to. 100, corresponding to elastic modulus of 0 (0) and Infinite (100);1respectively.
The measurement is made by Indenting a rigid ball into the rubber specimen.
The Shore A scale is the most prevalent in the United States. The readings range from 30 to 95points. Harder elastomers use a pointed conical indentor with the Shore 0 scale. The results of theShore A scale and the IRHD scale are approximately equal over the same range of resiliency.
Inelastomers with unusually high rates of stress relaxation or deformation hysteresis, the difference indwell time in the two readings may cause different results.
Also, the results of any hardness testdepend on the elastomer thickness.
Specified thickness should be used when conducting thesetests.Due to the mechanical limits of the test instruments, hardness measurements of elastomers arerarely expressed more precisely than 5 points.The surface indentation or hardness usually does not bear any relation to the ability of anelastomeric part to function properly.
Hardness is a measure of an elastomer's response to a smallsurface stress. Stiffness and compressive modulus measure the response to large stresses of theentire elastomeric part.S S. -- ~55'a 5- .-' .1-'-5*5,95~5 .SjI' ~ IS , *~i'5.' -55'¶ 1.~' -S I-.5'S *~'~~* , --. -
TAoLz 30 Shear, moment, sloe, and deflection formulas for long and short thin-waited c~ylindrical shells uwdfw oxisymmutgric loading (ConL)Loading and cam* no. Load temsata otoad and deformation equatons Sdected rahieeI&. ApplWe mor-Q mph1- = (caoxx + ain A4) Mu&Vr at xex O at 04d co Axna~ M~al# = -:11.&in Xx) at x = 04D?~ WAJ=Wdlinx daXJI=-...0403~L.
ax -DA2 k17.. Unifr prensure over aban~i o Superimpose cases 10 and 12 to make (at x0)0 a~~eanwm~
Q;dt Cam AA) atx2S01=-;.7 ----.1M."I" ".1010 01.ý.1j~i 111 I-~ -._q rr 13 02r I- a- C- io CA.'a o 'INMa 40r; I I & -I- CD &65- cro0n Ix0 aco1 .'M if II%ko~2~ ~ oAA 0.