ML20094B222
| ML20094B222 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 09/25/1984 |
| From: | Lou S, Minichiello J, Wong C CYGNA ENERGY SERVICES |
| To: | |
| Shared Package | |
| ML20094B179 | List: |
| References | |
| DC-2, DC-2-R02, DC-2-R2, NUDOCS 8411070065 | |
| Download: ML20094B222 (17) | |
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,_, Job Ho. 83090 Doc. No. DC-2
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- x. Rev. 2 l
INDEPENDENT LESIGN REVIEW PIPE SUPPORT DESIGN REVIEW CRITERIA FOR COMANCHE PEAK NUCLEAR PLANT - UNIT 1 TEXAS UTILITIES SERVICES, INC.
Prepared by - iS f S. Luo Date v by b O!bk C. Wor $ Date Approved by #5 Y
. W1 chiello Date CYGNA ENERGY SERVICES 101 California Street, Suite 1000 San Francisco, California 94111 September 1984 O
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F V TABLE OF CONTENTS f3 V
Section ,
Page 1
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1.0 INTRODUCTION
......................................... 3 2.0 SCOPE................................................ 3 3.0 CODES, STANDARDS AND REFERENCE DOCUMENTS............. 3 4.0 DESIGN............................................... 5 4.1 Physical Requirements.......................... 5 4.2 Restraint Loads................................ 8 4.3 Lo a d i ng Comb i n a t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.4 Allowable Stress............................... 10 4.5 Anchor Bolt Design............................. 10 m
- l T s/ 5.0 EXHIBITS............................................. 11 Texas Utilities Services, Inc. Page 2 of 12 Comanche Peak Independent Assessment Program l
- Il L A Job No. 83090; DC-2;'Rev. 2 1111111llll11lll11lll1ll1111ll
1.0 INTRODUCTION
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This document establishes general technical criteria to be used i in the review of pipe su,pports, shock suppressors, and anchors associated with the Residual Heat Removal / Safety Injection system piping scope described below. The purpose of this review is to ensure that the pipe supports are capable of supporting the piping system during all conditions of operation by transmitting the loads from the pipe to the building structural members. This document shall be used in conjunction with Work Instruction 1, .
" Assessment Procedures," for guidelines on the review methodology and documenta' ion requirements.
2.0 SCOPE This criteria document shall be used in the review of pipe
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supports and shock suppressors located along the main flow path of'the Residual Heat Removal / Safety Injection System - Train B taken from the heat exchanger (Tag No. TBX-RHAHPS-02) to the containment penetration MS-2. In addition, anchors located on the branch lines which define the stress analysis problem bounds shall be reviewed in accordance with this document.
3.0 CODES, STANDARDS AND REFERENCE NCUMENTS l
Based on industry'. standards and codes in effect at the time of I the original design, as well as documents which form part of the
, licensing basis for Comanche Peak, the following list of reference documents shall be used for the review:
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. r l',.w e ASME Boiler and Pressure Vessel Code Section III, Sub-x - , section NF, 1974 Edition with Addenda through and
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'- . including Winter of.1974.
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- American Institute of Steel Construction, Inc., AISC Steel Construction; Manual, 7th edition.
- . American Welding Society, Structural Welding Code, AWS D.1.1., 1979.
e Gibbs & Hill, Inc., Specification No. 2323-SS-30, Appendix 2.
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- Gibbs & Hill, Inc., Specif'ication No. 2323-MS-200,
- , Revision 3.
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- Gibbs & Hill, Inc., Specification No. 2323-MS-46A, Revision 3.
.,g Texas Utilities Services, Inc. Procedure CP-El-4.5 e e
Rev. 9.
e Browr & Roo,t, Inc. Procedure No. CP-CPM-9.10, Rev. 11 '.
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4.0' . " DESIGN ~ -
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I 4.1 Physical Requirements '
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' wA^ 4.1.1 Stittness_ ,
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1 p;]L,Whenactual:stiftness is not available, the estimated 4
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-' 3'yi- .d(('stif f ness' of a : pipe supp rt in .the-t d.<
pipe 's restrained i i direction must meet the required =sr.iftness shown in Exhicit
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? 4.1-10according to the nominal size'of>the restrained a
- pipe. The minimum stif fness requirement may be waiveo when
. the actual' computed stiffness is used. The final stiffness 3;, of the pipe: support.shall be based,on tha'as-built configuration and' properties of'.the su'pi. t.. stiffness of the-pipe support in'the' unrestrained direction sha15 have
@, .' sufficient' rigidity to provide a_ stable structure based hn v
h good: engineering practice. The stiffness' calculation e shall .
,.- consider the combined effects of the support frame and Y mechanical components. The flexibility ot the, building structure need not~be included in the stiftness calculation. /
- 4.1.2 -Caps %
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A gap shall be provided to accommodate radial expansion and
, construction ' tolerances. Themaximumtotal'gahallowed in (kherestraineddirectionis1/,8" (+ 1/16" installation tolerance). In' unrestrained directions, the support design
" shall allow " clearance for the most. severe thermal plus seismic movements ot the pipe.. Proper installation tolerances shall be.provided where thermal movement cannot be accommodated within the specified gap minus 1/,16".
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' Deviations
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'i : The design -location of the supports should be within the tolerances of TUSI Verification Procedure CP-EI-4.5-1, i.e.,
+ 2". .
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4.114 Spring Fupports *
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I Spring supports shall be capable of-exerting a supporting force' equal'-to the load, as determined by weight-balance calculations, plus the weight of all hanger parts, such as clamps and; rods, that will be supported by the. spring.
The design shall be'such ac to prevent complete release of the component load in the event of spring failure or misalign-
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ment. . Any variability of a supporting spring force resulting from movement of the component shall be considered
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in the Lloadings used' in the stress analysis 'of the com-ponent. : .The spring's'available travel will be checked ,
h - against all. the ' thermal and seismic movements. Spring suppo t shall'also be designed for.a maximum variation in
. supporting effort of 20 percent fo'r. a total travel resulting 1from thermal movement of the pipe. l l
4.1.5 Rod Hanger -
1 Rod. hangers'shall be subjected to tensile loading only if l specific gapping instructions are indicated on the drawings. . Ro'd hanger assemblies shall be designed to allow anticipated thermal horizontal movement without subjecting
.the~ pipe to extraneous. loads. The maximum swing angle due j I
.to horizontal pipe novement should be less than 5*. If the
- . . swing angle of the rod is in excess of 5' the hanger shall
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- Comanche Peak Independent Assessment Program A
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-- be offset two-thirds of the thermal movement towards the
.p A ,) direction of movenent. Rod hangers for piping more than 2-1/2 inches should not be less than 1/2 inch diameter.
4.1.6 Snubbers gJ-The snubber assembly shall be of fset two-thirds of the ther-mal. movement in the cold position if the swing angle exceeds 5*. _The midpoint of thermal travel for snubber strokes should be set at the midpoint of the total travel.with hot
- and cold settings established accordingly. In situations where space limitations prohibit this, snubbers shall be set with at least a 1/4" margin provided within the snubber stroke after warst case-thermal conditions are considered. ,
h The maximum travel range of the snubber must be checked
. under maximum thermal- movements.
4.1.7 Sway Struts
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Sway Struts are used to restrain movement of piping in one
- direction while_providing for thermal movement in the unrestrained direction. Functionally, the rigid sway struts are similar to snubbers except that the sway strut does not n allow free thermal movement in the restrained direction. In other words, the sway strut takes up static and dynamic loading. The maximum swing angle due to misalignment or thermal move, ment should be less than 5*.
_4.1.8 Base Plates and Anchor Bolts Base plate stiffness ano prying'effect shall be considered
- in the design review of the pipe supports. The Teledyne
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Texas Utilities Services, Inc. Page 7 of 12
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method,-- h finite element analysis, or any rational analysis A/
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.may be used to check the adequacy of the base plate and
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. anchor bolts.
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4.1.9 Structural details ~ shall conform to the require- ,
ments of the AISC Manual of Steel Construction.
4.1.10 All seismic ' supports shall be plus and minus restraints..,Regardless of other imposed loads, the pipe -
must be physically restrained in each direction along the restraining axis. The exception.to this is the case of a vertical support'for.which the dead weight and dead weight
.plus thermal loads allow use of a uni-directional restraint.
4 4.1.11 The support calculations shall reflect the actual support geometry and load distribution. Changes to the
' initial geometry, or use of-one geometry to qualify a differerit geometry, shall be justified.
4.2 ~ Restraint Loads F
Theiloadings that shall be taken into account in designing a.
. component support include, but are not limited to, the following :
- Weight of the component, insulation, and normal con-tents (DL). Pipe'and component weights from manufac-f' turer's, data, i
e . Loads generated by restraihed thermal expansion. These include temperatures at normal operating conditions r (TH).
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Texas Utilities Services, Inc. Page 8 of 12 L JL A Comanche Peak Independent Assessment Program -
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.* Friction. loads (FL) are to be applied in the direction
( ,) ~ of thermal movement. The magnitude of this load shall Hbe ' the friction coefficient times the larger of a) the algebraic sum of the pipe's dead load and the maximum thermal load or b) the pipe's dead load. The friction i coefficient for steel on steel shall be 0.3 and for steel on teflon 0.07 '
e Safe Shutdown Earthquake, Inertia and anchor movement loads included (SSE).
e Pipe _ Impact Loads (PI)
- Jet Impingement Loads (JI) 4.3 Loading Combinations
, -i - The following loading conditions should be used for the design
's-review of pipe _ supports:
- 1) Testing condition DL
'2) Design and normal operating condition DL + TH + FL
- 3) Upset cperating condition DL + TH + 1/2 (SSE)
- 5) Faulted operating condition
Texas Utilities Servicer, Inc. Page 9 of 12 tek (tj i i Comanche Peak Independent Assessment Program 1888611881111111lll181lll!!!11 - Job No. 83090; DC-2; Rev. 2
_. '] t 4.4'_ Allowable Stress U
Allowable stresses should follow the ASME. Boiler and Pressure
-Vossel Code Section III,-Subsection NF,.and the appropriate sections of American Institute of AISC Specifications, and structursl steel members should meet all the AISC requirements.
4 Exhibit 4.4.1 contains a table of allowable stresses to be used
.in the review for A36 steel, A307 bolt and E70s weld-at room temperature .
4.5- Anchor Bolt Design 4.5.1 l Applications
- a. deleted.
'[} b. Anchors must be at least 1/2" diameter when used-for
. structural connections or for anchorage of pipes greater than 2" diameter.
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- c. Embedded length of anchor shall be. exclusive of thick-ness of. grout pad or other overlay.
4.5.2 Allowable Loads
-a.- Allowab}e loads shown in Exhibit 4.5-1, shall apply to anchors installed in ordinary concrete with ff = 4000 psi only.
- b. For concrete strength between 3 ksi and 5 ksi, the data in Exhibit 4.5-1 may be ratioed up or down.
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dx /l c. Allowable load values-given in this standard shall not be increased because~of short duration of loading (e.g., for wind or seismic loads) .
- d. If center-to-center spacing of anchors is less than 10 diameters and/or if distance from edges of' concrete to center of anchor is less than 5 diameters, the allow-able~ loads shall lue reduced in accordance with the Gibbs'& Hill Project Design Specification 2323-SS-30, Appendix 2.
- e. For anchors which will be subjected simultaneously to pullout and shear forces, the allowable load values used must satisfy the following formula:
P
( p"C ) + (3 SC)<1 p/ .
where:
P D' SD = allowable loads (pullout, shear), reduced for spacing or edge distance if appropriate.
P C' SC = design loads to be used in cases where pullout and shear loads may occur simultaneously.
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Texas Utilities Services, Inc. Page 11 of 12 ab { j g i Comanche Peak Independent Assessment Program 311111111lllll!!!11111llll!!1 ' Job lio. 83090; DC-2; Rev. 2 4
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- -f5 5.0 EXIITBITS
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Exhibit I 4.1-1 Stiffness of Piping Supports
-Exhibit 4.4-1 Allowable Stresses Exhibit 4.5-1 Allowable Load on Expansion Anchors J
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temrBIT 4.1-1
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SPRING CONSTANTS (STIFFNESS) OF PIPING SUPPORTS (Application for Seismic and hermal Analyses) 1 )' Rigid Restraints Nominal Translational Rotational Pipe Size Stiffness Stiffness (in.) Kt (lb./in.) Kr (in.-lb./ rad.)
.Under 6 7 2 x 10 1 x 10 6 8 6 to 14 1 x 10 1 x 10 j Over 14 5 x 10 6 1 x 10 9
- 2) Mechanical Shock Arrestor nL/ Nominal Pipe Size Rated Load Etiffness (in.) (1bs.) K (lbs./in.)
Under 2 1,000 1 x 10 5 5
2 to'6 3,000 2 x 10 8, 10, 12 10,000 3 x 10 5 35,000 6 Over 12 1.35 x 10 Note: Stiffnesses shown here are obtained from the reference document, Gibbs & Hill, Inc. Fpecification No. 2323-MS-200, Revision 3, Table 3.4-1.
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.L Texas Utilities Services, Inc. 1 l Comanche Peak Independent Assessment Program bjk i Job No. 83090; DC-2; Rev. 2 lilllllllilllllilUllillllllli
], EIBIBIT 4.4-1
/ 1 O ALLOWABLE STRESSES Load Case Testing, Normal & Upset Stress Value KSI Emergency Faulted Tension 0.G Fj 21.6 Sher.r O.4 Fy 14.4 Web Cripplir.g 0.75 F,7 27.0 F, per Al4SE Appendix XVII-2213 Bending As per ASME 1.33 x Normal As per ASME Appendix Allowable Code, Section XVII-2214 III, App. F Bearing 0.9 Fy 32.4
[ Allowable V Bolts Tension Tension & Shear per ASME Appendix XVII-2460 Welds (Fillet, Full Per or Partial Pene- ASME III,NF tration): Table i NF-3292.1-1 f
l- Ar.:: hor Bolts (See Exhibit 4.5-1)
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l Combined Strens Per ASME l Appendix -
, XVII-2215 Catalog Items Catalog values 1.33 x Catalog As per ASME Values Code, Section
! III, App. F l
Note: Allowable stresses are for desigas based on room temperature.
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i V l Texas Utilities Services, Inc. 2 l Comanche Peak Independent Assessment Program bL A Job No. 83090; DC-2; Rev. 2 11111111Q!!!!1lll11lll111tll l
EIBIBIT 4.5-1
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' ALLOWABLE LOAD ON EXPANSION ANCHORS KNIK-BOLT
. DESIGN ALLOWABLE TENSILE & SHEAR LOADS * (lbs.)
- Factor of' Safety 'FS = 4.0
- ES = 5.0
-Diameter Embedment Tension Shear Tension Shear 1/4" 1-1/C" 364 653 291 522 1-1/2" 556 653 445 522 1-3/4" 675 653 540 522 2" 7 81 653 625 522 2-1/4" 827 653 662 522 2-1/2" 837 653 670 522 3/8": 1-5/8" $88 1276 471 1021 2" 756 1276 605 1021 2-1/2" 975 1276 780 1021 3" .1075 1354 860 1083 3-1/2" 1150 1354 920 1083 I
- . 4" 1187 1354 950 1C83
,. 4-1/2"' 1200 1354 960 1083 I. 1/2" 2-1/4" 1377 2079 1102 1663 2-3/4" 1800 2079 1440 1663
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3-1/2" -2362 2079 1890 1663 4-1/2" 2806 2558 2245 2046
.5-1/2" 3012 2558 2410 2046 6" 3075 2558 2460 2046 5/8" 2-3/4" 1650 2880 1320 2312 3-1/2" 2275 2890 1820 2312 4-1/2" 3000 2890 2400 2312 5-1/2" 3575 2359 2860 3087
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6-1/2" 4000 3859 3200 3087 7-1/2" 4250 3859 3400 3087
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- Archor bolt allowables are based on a factor of safety equal to 5 and fy equal to 4000 psi in the review.
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. Texas Utilities Services, Inc. 3 Comanche Peak Independent Assessment Program Lk..k Li1 .Tob No. 83090; DC-2; Rev. 2 1111111116111111111111111111 0
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EEMIBIT 4.5 l
'O- (continued) ib - ALLOWABLE LOAD ON E%PANSION ANCHORS 2 KWIK-BOLT-DESIGN ALLOWABLE TENSI~ 3 & SHEAR IDADS* (lbs.)
Factor of Safety FS = 4.0 *FS = 5.0 1 Diameter Embedment Tension Shear Tension Shear l
I 3/4" 3-1/4" 2537 4283 2030 3426 4" 3350 4283 2680 3426 i 5" 4125 4283 3300 3426 6" 4500 4616 3600 3693
. 7" 5250 4616 4200 3693 8" 5750 4616 4600 3693 9" 5875 4616 4700 3693 I l
1" 4-1/2" 4000 6719 3200 5375 5" 4725 6719 3780 5375 )
6" - 5860 6719 4688 5375 7" 5860 6719 4688 5375 '
8" 5860 8622 4688 6898 9" 5860 8622 4688 6898 10" 5860 8622 4688 68?1
's 1-1/4" L-1/2" 5750 8920 4600 7136 1/2" 6775 8920 5420 7136 7-1/2" 7775 0920 6220 7136 8-1/2" 8650 5920 6920 7136 9-1/2" 9450 8920 7560 7136 10-1/2" 10225 8920 8180 7136 1/2" 3-1/4" 2496 2860 1997 2280 4-1/4" 3695 2860 2956 2280 5-1/4" 3641 2860 2913 2280 6-1/4" 3786 ,2860 3029 2280 1" h-1/2"- 8741 6984 6993 5507 8-1/2" 12452 6864 3962 5507 10-1/2" 12439 6884 9951 5507 s
-*-Anchor-bolt allowables are based on a factor of safety equal to 5 and f; equal to 4000 psi in the review.
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M Comanche Peak Independent Assessment Program Job No. 83090; DC-2; Rev. 2 lWilllllNillNiilllllllllli
EERIBIT 4.5-1
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.(j SUPER KWIK-BOLT DESIGN ALLOWABLE TENSILE & SHEAR LOADS * (lbs.)
l-Factor of Safety FS = 4.0 *FS = 5.0 Diameter Embedment Tension Shear Tension Shear 1-1/4" 8-1/8" 10675 10369 8540 8295 10-5/8" 13420 10369 10736 8295 13-1/8" 16230 iu369 12984 8295
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- Anchor bolt allowables are based on a factor of safety equal to 5 and fj j equal to 4000 psi in the review.
i l Note: Please refer to reference documents, Gibbs & Hill, Inc., Specification No. 2323-SS-30, Appendix 2, Pages 3 and 4, for these. anchor bolt allowable loads.
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Comanche Peak Independent Assessment Program
! .L k & Job No. 83090; DC-2; Rev. 2 111111111111111111lllll1llllll
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