ML20216B419
| ML20216B419 | |
| Person / Time | |
|---|---|
| Site: | 05200003 |
| Issue date: | 04/07/1998 |
| From: | Gametta R WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| To: | |
| Shared Package | |
| ML20036E304 | List: |
| References | |
| MT03-S3C-025, MT03-S3C-025-R01, MT3-S3C-25, MT3-S3C-25-R1, NUDOCS 9804130461 | |
| Download: ML20216B419 (57) | |
Text
,. AP600 DOCUMENT COVER SHEET 1oc ,03 , ,
- {
Form 58202G(SS4)[t.\xxxx.wpf 1x] AP600 CENTRAL FILE USE ONLY. l
. OoS8FAM RFS4 RFS ITEM s:
AP600 DOCUMENT NO. REVISION NO. ASSIGNED TO MT03-S3C-025 1 Page 1 of 57 ALTERNATE DOCUMENT NUMBER: N/A e
' , . WORK OREAKDOWN #: ME DESIGN AGENT ORGANIZATION: ANSALDO 7 TITLE: HYDRODYNAMIC LOADS ON VESSEL HEAD SUPPORT COLUMN AND ADS PIPING j INDUCED BY ADS BLOWDOWN {
ATTACHMENTS: DCP #/REV. INCORPORATED IN THIS j DOCUMENT REVISION: 1 CALCULATION / ANALYSIS
REFERENCE:
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1 H
I
/ AP600 DESIGN SPECIFICAT!ON WESTINGHOUSE l
l Table of Contents l
j Abbreviations REFERENCES l
- 1. SCOPE I
- 2. METHODOLOGY l
l 9 3. RESULTS 3.1 Support Column 3.2 Vertical ADS discharge Piping 1
l 3.3 Horizontal ADS discharge Piping 1
- 4. CONCLUSION i
l FIGURES l
l l
l MT03 S3C-025, Rev.1 PAGE 3 OF 57 DATE 3 April 1998 MT3S3C25. DOC
, AP600 DESIGN SPECIFICATION WESTINGHOUSE ._
Abbreviations AD Acceleration Drag AOS Automatic Depressunzation System IRWST In Containment Rei'ueling Water Storage Tank PRHR Passive Residual Heat Remcul PRZ Pressurizer PSD Power Spectral Density VD Steady Velocity Drag
~
n d
MT03-S3C 025, Rev.1 PAGE 4 OF 57 DATE 3 April 1998 MT3S3C25. DOC
i
.' AP600
. DESIGN SPECIFICATION WESTINGHOUSE REFERENCES
- 1. Gambetta R. - Drag Forces on a SUBMERGED STRUCTURE induced by sparger steam oscillations:
Ansaldo Doc. no. STU-0440-SRPX-0050-000, May 1994
- 2. Maceo A. -
ADS Discharge Investigation and IRWST Hydrodynamic Global Analysis; Ansaldo Doc. no. MT03 S3C-Ol2, April 1996 al. Gambetta R.- The Phenomenon of the Pool Bubble Oscillations following a Relief Valve Air Clearing Event:
Analytical and Experimental Investigation; g Ansaldo, Doc. # STU 0440 SRPX 0025 000, march 1994 a2, Traversone - Source Term Evaluation in Model Tank; Ansaldo, Doc. # ADP 2110 TCLX C018000 febr.1993 a3. Dernetti P. - Analysis Plan of Ansaldo IRWST l Hydrodynamic Analysis; I Ansaldo, Doc. # ADP 2110 TCIX C010000 june 1991 l a4. Ventunni A. - PRECCl: a Computer Code to Calculate the Normalized Pressure Distnbution on Pool Boundaries due to Quencher Water and Air Clearing Loads Ansaldo AMN. Doc. # 400 RT 6203, sept.1980 c l. Otnes R. K.- DigitalTime Series Analysis:
John Wiley & Sons,1972 c2. Milne L. M.- Theoretical Hydrodynamics; M ACMILLAN,1968 l
MT03-S3C 025, Rev.1 PAGE 5 OF 57 DATE 3 April 1998 l
MT3S3C25. DOC
AP600 DESIGN SPECIFICATION WESTINGHOUSE d1. Arinobu M.- Studies on the Dynamic Phenomena caused by Steam Condensation in Water:
ANS/ASME/NRC Int. Meet. on Nucl.
React. Hermal Hydraulics, Saratoga,1980 d2. Narai H. -
Fluid and Pressure Oscillations occuring at AyaI. Direct Contact Condensation of Steam Flow with Cold Water:
Nucl. Engin & Design 95 (1986) 35-45 d3. Moody F. J.- Dynamic and Bermal Behaviour of Hot Gas Bubbles Discharged into Water:
Nucl. Engin, and Design,95,47-54,1986 d4. Patdoussis -
A Semi potential Flow Theory for the Dynamics ,
q of Cylinder Arrays in Cross Flow:
Symp. of now induced vibrations, ASME winter meet.,1984 d5. Wood B. D.- Determination of Pressure Fields in a Suppression Pool by means of Green's Functions and Comparison with Method of Images and a Finite Difference Solution:
Nucl. Engin. and Des.,61,1980 ,
l i
l MT03-S3C 025, Rev.1 PAGE 6 OF 57 DATE 3 April 1998 i
MT3S3C25. DOC 5
l AP600 DESIGN SPECIFICATION WESTINGHOUSE -' ._.... ,
- 1. SCOPE This technical note presents a conservative evaluation of the dynamic loads exerted on the IRWST submerged structures support columns and ADS piping following the ADS actuation and subsequent two-phase mixture blow down.
The calculation has been performed using the simplified approach of a potential tiow in an infmite (or semi.in11 nite) pool, which assumes an oscillating steam bubble around the sparger center or in the ADS discharge region.
The approach used in this work coincides with the methodology developed to compute the dynamics loads on the PRHR Heat Exchanger Tubes.
The general aspects of the methodology are reported in section 2 together with specific assumptions used to compute loads on head suppon columns and ADS piping. ,
4 Section 3 presents the final loads on both structures to be used for structural analysis evaluation.
Conclusions are outlined in section 4.
MT03-S3C-025, Rev.1 PAGE 7 OF 57 DATE 3 April 1998 MT3S3C25. DOC
,- AP600
, DESIGN SPECIFICATION WESTINGHOUSE
' 2.~ ~ METIIODOLOGY The methodology used in this work is described in this section.
The methodology utilized for the evaluation of the hydrodynamics loads on the support column is applied also to evaluate the loads on the vertical ADS discharge piping.
As far as the honzontal position of the piping, at higher elevation, is concerned, a slightly different approach is used.
Following the basic assumptions used are summarized:
. The 11uid motion is assumed irrotational, thus a velocity potential function describes completely the motion state.
- In the region around the sparger, the motion is assumed incompressible. Notice that the, y Support Columns interest only sparger B of Fig.1. )
1
- The steam osediation phenomenon occurring during blow down and pool condensation is simulated by means of an ideal vibrating bubble. The radius of the bubble ( called RADIUS) has been assumed equal to the sparger arm length (4.58 ft), see Fig.1 & 2. In this model the hubble acts as an ideal time dependent source in the potential llow field.
. The Source Strength Rate S*( t) is derived from VAPORE PHASE B930 & 330 TESTS [21 The PE16 wall pressure time. history of tests B930 & 330 have been selected as the most representative of the condensation-induced pressure tield in the tank. A Method of Images computer program (code PRECCl, Ref. A4) has been employed to compute the function
- S'( t) on the basis of wall pressure measurements and taking into account the VAPORE l tank cylindrical geometry. l
. A numericalintegration allows to obtain the Source Strength time history S( t).
MT03-S3C-025, Rev.1 PAGE 8 OF 57 DATE 3 April 1998 MT3S3C25, DOC
I I
. AP600 DESIGN SPECIFICATION WESTINGHOUSE F
[ The ljvdrodynamic Model l
l In order to calculate the forces exerted on submerged structures caused by condensation osediations at the exit of the spargers during the blow down phase of an j ADS actuation, a hydrodynamic model using a potential tiow approach and the image technique is employed.
l The effect of VAPORE tank boundaries is simulated by an array of virtual images of the real source, which is the condensation event near the sparger.
The source strength and characteristics are obtained from the VAPORE test data.
The Condensation Phenomenon It is known that steam injection into subcooled water produces unsteady phenomena l n called chugging or condensation oscillation. These phenomena have been studied witR a special concern to the transient phenomena in the light water reactor pressure suppression system (Ref. dl, d2).
It is known about downward venting systems that if the steam velocity is rather high, y steam always condenses outside the vent pipe, and periodic pressure osediations are observed in the pool. The steam water interface also oscillates.
These phenomena are called condensation oscillations.
, A general theory of the oscillation frequency and pressure amplitude produced by condensation osedlations can be derived from linear analysis of steam bubble motion at vent tube exit. Steam bubble in the analyses (Ref. d2) has in general been
- assumed either of cylindrical, spherical, or hemisphetical shape.
It has pointed out (Ref. di) that if steam is injected from many small pipes or many small holes (hke a sparger), the pool walls will experience much smaller pressure amplitudes. The smaller diameters of the pipes and holes will produce the smaller bubbles, which osediate out of phase, thus inducing smaller pressure ticid amplitudes in the pool water and on the walls.
However the analytical model of the condensation phenomena at the exit of tne sparger holes is not simple at all.
1 l
MT03-S3C 025, Rev.1 PAGE 9 OF 57 DATE 3 April 1998 MT3S3C25. DOC
/ AP600 DESIGN SPECIFICATION WESTINGHOUSE Sparger Coradensation The submerged steam discharge rate from oritices Eke those in the ADS .sparger at low discharge rates may be slow enough to form single bubbles which grow and detach penodically (Ref. d3).
Higher discharge rates , form gas jets, which break up into small bubbles. Around the discharge device a bubble population develops which gets a statistical equilibrium characterized by a dominant frequency and amplitude of vapor bubbles growtng and collapsing. The bubbles may also coalesce to form a large region of steam separated f rom the subcooled water by an extended interface, which vibrates rapidly.
Since the simulation of such phenomenology requires extended experimental data and theoretical models not avadable at present time, the condensation osctllation event is simulated by a simplified model as follows.
The etfect of the oscillatory condensation phenomenology is modeled assuming an ideal tuli volume ot' steam, hereinafter named steam bubble, which, because of the 9
condensation occurring at the interface with cold water and mechanical interaction wah pool water, periodically expands and contract through small volume oscillations.
This vibration produces periodic expulsion and aspiration of liquid from the volume occupied by the steam bubble.
The volume V of the steam bubble is assumed a function of the sparger arm radius (Rs) (Ref.1).
The concept of the single steam bubble leads to a pulsating volume which induces a time dependent tiow in the pool water.
The strength of this lluid source can be measured, in the context of the incompressible irrotational fluid theory, on the basis of the VAPORE pressure traces on the wall.
l l
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MT03-S3C 025, Rev.1 PAGE 10 OF 57 DATE 3. April 1998 MT3S3C25, DOC
/ AP600 DESIGN SPECIFICATION WESTINGHOUSE IRWST Pool Flow Field The oscillatory condensation phenomenon at the exit of each sparger causes time-varying water flow in the IRWST pool. To describe this transient flow, effect of compressibility within the pool water is assumed to be negligtble.
Fig. l shows the plan view of IRWST with sparger locations. In the tigure letters A and B are used to identify spargers.
For an harmonic acoustical signal in water, the charactenstic wave length A, is equal to A=c/f where e is the sound speed and f is the excitation frequency.
In the VAPORE test the highest substantial excitation frequencies are in the range of 50 to 70 Hz. For a sound speed of - 5000 ft/sec in water, this leads to a minimum characteristic wave length A equal to ~ 7011. This values is about the radius ot the IRWST (65 ft) and therefore the incompressible approach cannot be utilized in order to compute the global fluid tield into the pool. For this reason the structural analysis 06 h the pool walls requires the use of an acoustical model of the water (D'Alembert boundary-value problem) as presented in Ref. a3.
However if we limit the tield of observation to the region around the discharge device incompressibility assumptions can be made.
Region close to Discharge Device Hereinaller we refer only to the discharge of one sparger since structures object of the loads calculation (ADS discharge piping and Vessel Head Support Columns) are so close to one sparger that forces induced on such structures from the other discharge device can be considered negligible.
In the region near the steam bubble around the sparger the following condition is satistied:
A n Rs Therefore near the bubble the water motion can be considered as incompressibic. We >
make the following turther assumptions:
. Friction ettects can be neglected in comparison to the ettects of inertia forces.
. Vorucity etlects are not considered.
. The pool is tntimte. Correction to account for the presence of boundaries wdl be con.sidered later.
MT03-S3C-025, Rev.1 PAGE 11 OF 57 DATE 3 April 1998 MT3S3C25. DOC l * --
1 -
AP600 DESIGN SPECIFICATION WESTINGHOUSE f-1 i In such a manner the condensation osctilation at discharge device is sunulated by a classical hydrodynamic source (Ref. c2).
We iridicate with S the strengthof the source. detined by I
I S = V' / 4n where the apex indicate time derivative.
l Then the velocity potential close to the sparger is written as (Ref.1):
l c=S/r An improvement of this tiow tield modelcan be carried out in order to account for the l wall effect by using the image technique (Ref.1). Since the motion respects the incompressibility requirements only in the region close to the sparger, the image I
technique allows us to simulate walls only near the discharge device, and not throughout all the pool. f i
M VAPORE Tank Flow Field incompressibility Assumpdon The dimensions ot' the tank are smaller than the IRWST dimensions. Therefore the j mcompressible approach can be applied to the flow tield of the tank. This fact allows ps to compute the source strength knowing the pressure traces at the wall by means of
, the image technique, as will be explained in the following.
Incempressibility condition :
A. >> R ta where R ta is the tank radius.
Since R ta
- 12.5 ft , the condition is satistled.
MT03-S3C-025, Rev.1 PAGE 12 OF 57 DATE 3 April 1998 MT3S3C25, DOC
~
AP600
. DESIGN SPECIFICATION WESTINGHOUSE Calculation of the Source Strength -
The excitation source due to steam condensation is modeled in the same way as in the IRWST. by utilizing the concept of hydrodpamic source. The motion in the water tank is assumed everywhere incompressible, potential and non vtscous. Therefore the governtng equations are represented by Laplace equation and unsteady Bernoulli equation (Ref. c2).
It is possible to solve Laplace equation for the tank by means of the image technique, as fully explained in Ref.1. The effect of tank boundaries is simulated by creating an array of virtual image sources and the effect of free surface is simulated by creating an l
array of virtual sinks.
1 Following Ref.1, for a cylindrical tank with a free surface,
& = S' / r er l 4 The geometrical factor (t/r eyr ) can be computed by the Ansaldo code PRECCI (Ref, a4). The code utilizes an array of 8 diamonds centered on the hydrodynamic source as reported in Fig. 33. To introduce three dimensional modeling, two more arrays are added as reported in Fig. 34. The total number of image employed is 580.
A comparison of the method of images solution with the analytical solution given by l the Green's tunction approach is presented in Ref. d5. The results indicate that the two methods compare favorably.
Applying unsteady Bernoulli equation, S' can be determined after the geometric l
tactor ( l / r rr) e is known, by means of the following equation:
S' = (pwall / p)
- rre i MT03-S3C 025, Rev.1 PAGE 13 OF 57 DATE 3 April 1998 MT3S3C25. DOC
\
l AP600
. DESIGN SPECIFICATION WESTINGHOUSE Drag Forces on Submerged Structures in Unsteady Flow Steam _ condensation vibration induces a tiow tield in the IRWST. The liquid motion will impose torces on submerged structures.
l Since we have assumed that water motion across tubes is incompresstble and l trrotational, we can utilize the model and methodology developed in the frame of the air clearing phenomenology (Ref.1) to compute the hydrodynamic forces on the tubes.
l The most common force, hereafter called steady or velocity drag (VD), is a summation of skin friction and the pressure drag caused by wake fonnation behind structures tn a moving fluid. Steady drag is predicted with the help of experimentally determined drag coetticients, based on steady 110w tield with negligible free stream pressure gradients.
l In addition to VD, another force can exist which is caused by acceleration of the flow ticld about a submerged structure. Fluid acceleration is associated with a pressure gradient in the free stream, which imposes a force called acceleration drae ( AD).
Structures in unsteady tiows experience a combination of both steady and accelerating drag forces, which should be estimated in order to determine mechanical design requirements (Ref.1).
Notice that in unsteady tiow (with a /cro mean time value) the VD contribution to the I global drag force is very low and its coninbution is usually neglected.
Acceleration Field The idealized basts of this approach is that submerged structures to be considered are
- submerged in an infinite, spatial uniform flow with time-dependent velocity vint( l I and acceleration d
y ( vjng( t ) l I d can be calculated at each time instant.
The acceleration tield y[vinttt)l The submerged structure is supposed to be nonnal to the uniform tiow ticld (Fig. 35).
MT03-S3C 025, Rev.1 PAGE 14 OF 57 DATE 3 April 1998 MT3S3C25. DOC t
l l
AP600 DESIGN SPECIFICATION WESTINGHOUSE The Acceleration Drag in the Potential Flow it is ahown (Ref. al) that the acceleration drag force (AD) has the tollowing expression:
d Fad = pVad
- 5( Vinf) where the acceleration drag volume is defined by Vad = Vs + Ma/P where M 3 is the added submerged structure mass, also called hydrodynamic mass, and Vs is the volume of the submerged stmeture (Ref, c3).
Steady Drag Formula ,
Based on umform, non-accelerating tiow at velocity vinf, the steady drag is expressed as follows:
Esd = Cd
- Ax
- 1/ 2
- p
- vint2 Structures are considered submerged in a uniform tiow whose direction is aligned with the x-axis, as shown in Fig. 35. The area Ax is the projection of surface body area A on a plane normal to the x axis. Cd is a coefticient depending on the form of the body and the Reynolds number, and it is usually determined through experimental charts (see Ref. a1).
l MT03-S3C-025, Rev.1 PAGE 15 OF 57 DATE 3 April 1998 MT3S3C25, DOC
.' AP600 DESIGN SPECIFICATION WESTINGHOUSE LOADS CALCULATION 1
Following the methodology just described the S'(t) function has been determmed usut3 data from VAP. ORE PHASE B tests 330 & 930 using the PEl6 wall pres;ure time histones. '
Starting from this source strength function S'(t) the following steps ha' e been performed.
- An S( t ) function has been determined trough numericalintegration. l e The velocity tield at the bubble surface can be computed by: I 3
VEL _ SURF = S( t , / RADIUS
- The acceleration tield at the bubble surface is coinputed by:
2 ACC_ SURF = S*( t ) / RADIUS e The Support Column has been subdivided into 9 segments each one 3.12 ft long, in accordance to structural analysis (ANSYS code) indications. ,,
l %
e The velocity tield at each Support Column element surface is computed by:
! VEL _ COL = S( t ) / DIST
( being DIST the distance from the bubble center (sparger center) to the submerged structure i element (see Fig. 2).
l e The acceleration field at the Suppon Column element surface is computed by:
ACC_ COL = S*( t ) / DIST 1
. The VD magnitude at the bubble surface is computed by:
l
, VD( t ) = VCOEF
- VEL _ SURF
- ABS ( VEL _ SURF )
l where VCOEFis % p Cd Ax where:
Ax is the cross tiow section of the structure r p is the water density Cd is the Drag coctticient (chosen conservatively equal to 2.0)
MT03-S3C 025, Rev.1 PAGE 16 OF 57 DATE 3 April 1998 MT3S3C25. DOC
l J AP600 DESIGN SPECIFICATION WESTINGHOUSE 1
l l
. The VD magnitude at the Support Column element surt' ace is computed by:
VD( t ) = VCOEF
- VEL _ COL
- ABS (VEL _ COL) l
- The AD magnitude close to the bubble surface is computed by:
AD( t ) = ACC_ SURF
- ACOEF l where ACOEF is detined below:
l l
ACOEF = RHO
- n
- DIAM2 / 2.
- HEIGHT RHO = water density, = 62.9 lbm/ft3 DIAM = Support Column cross section diameter,
( = 18 inch) ,
HEIGHT = 3.12 FT, = Suppon Column element length 1
e The AD magnitude at the Support Column element is computed by:
- ACOEF where ACOEF is detined as above.
- The AD & VD time-histories are algebraically added at each instant to obtain the Total Drag Force.
l
- Finally, forces obtained have been projected along the direction perpendicular to the l l
l Suppon Column axis (see Fig. 2).
1 1
i l
MT03-S3C-025, Rev.1 PAGE 17 OF 57 DATE 3 April 1998 i MT3S3C25. DOC L
.- AP600
, DESIGN SPECIFICATION WESTINGHOUSE 1
{
. This approach presents some conservatism since:
)
The random character of the steam osediations is modeled using a untform bubble pulsating motion, where all the pool liquid moves in phase with the vibrating source.
Any dissipative or vorticity effect is neglected.
The submerged structure is assumed to be rigid, thus neglecting surface pressure reduction due to tiuid structure interaction.
It is remarkable that either the effect of the second sparger bubble or the effect of the walls are negligible since the Support Columns are very close to sparger B, and the source tiow tield goes down following the inverse of the squared-distance.
- Notice that the incompressible irrotational flow assumption allows for the space time
~
separation of the space-time dependent pool tiow thid. Therefore the time dependence of y all meanmgful lluid dynamics variables coincides with the time-dependence of t'ne PE16 pressure forcing function. As a consequence, the spectral content of velocity, acceleration ;
and drag force time-histories is identical to the PEl6 spectrum throughout the whole I discharge region.
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MT03-S3C 025, Rev. *. PAGE 18 OF 57 DATE 3 April 1998 MT3S3C25. DOC
l
.' AP600
~~
DESIGN SPECIFICATION WESTINGHOUSE -- ~ )
. I TDS PIPING FORCING FUNCTIONS e Vertical Ploinir.
The same procedure outlined with reference to Support Column has been uxd for )
the node B. C. D of Fig. 3 (up to the curving bend) of both the discharge lines.
Note that in this case the oscillating bubble has been located at a distance equal to the sparger radius (= bubble radius) along a direction perpendicular to the vertical axis of the pipe (see Fig. 4) and rotated of 45 deg. with respect to the quencher arm ( the choice of the arm is not intluent). Moreover, the long segment A -------B has been subdivided into 5 element in order to make a more detailed evaluation of the forces.
These elements have been indicated as B1,2. 3,4,5.
On .r.e basis of this new location of the bubble Velocity And Acceleration Drag Forces have been computed.
- Horizontal Pipinz
, J M l We refer here to the piping between nodes E & I in Fig. 3. This piping is horizontal and near to the free surface. Since the discharge IRWST region is approximately a closed box, the streamlines characterizing the bubble oscillation 110w pattern are deviated by the pool 11oor and canalized by the vertical walls towards the free surface, as depicted in Fig. 5.
1 Thus the horizontal piping is subjected to an oscillating tiow which is practically perpendicular to its axis. To obtain a conservative evaluation of the loads on the horizontal piping the tollowing approach has been used:
The sparger bubble has been assumed to move randomly around the quencher,
. positioning below any horizontal pipe element. As a consequence the condensation bubble is located under the vertical line which passes through the pipe element (1 ft long), and at the quencher elevation.
To account for the free surface ef fect (see Fig. 7), a bubble sink image is located above the free surface in accordance to the Method of Images. Fig. 6 shows the bubble
. position with respect to the piping in this approach.
Notice that the load exerted by the bubble tiow on each ift pipe element has been assumed to act along the perpendicular from the bubble center to the pipe element axis (line OP of Fig. 6).
Notice that tn the calculation on the torces acting on the HORIZONTAL PIPING.
because of the ditterent methodology utilized, the lowjs are given in LBF\FT.
MT03-S3C-025, Rev.1 PAGE 19 OF 57 DATE 3 April 1998 MT3S3C25 DOC
1 l l I
- l
. AP600 )
l- DESIGN SPECIF; CATION WESTINGHOUSE l
- 3. RESULTS 4
l The analysis have been performed for both tests B930 and B330 using the whole time histories.
l In the following tigures only the B930 test (15-30 s) intervat is here presented, since it presents
) the highest oscillation peaks.
l The ADS-VAPORE pressure ume history is reported in Figs. 8 and 9.
l The Source Strength Rate time history evaluated as described in section 2 is reported in Fig.
10, whereas the Source Strength time-histoy is presented in Fig.11. i The surface bubble velocity and acceleration are reported in Figs.12 and 13 respectively, it is seen that the velocity values are very small, therefore the velocity drag is negligible and only the acceleration drag gives contribution to the calculation of the loads.
However the total drag force calculation takes into account also the VD contribution, although vcq small.
3.1 Sunoort Column 1
g Figs.14 and 15 show the AD & VD at Support Column element no. 5 respet.tively. It can bi observed that the velocity drag is quite negligible in comparison with acceleration drag.
l Figs. from 16 to 24 report the total force time history on the Support Column element no.1.
I 2. 3,4,5,6,7,8 and 9 respectively.
1 3.2 Vertical ADS discharme Ploine l
l Fig.'s from 25 to 29 report the total force time-history on the segment from node A to node l B. that is with reference to elements no.1,2,3,4. 5 respectively (each one 3.5 ft height, for a 1 l total height of 17.5 ft). Note that the forces are identical for both the discharge lines.
( Fig. 30 shows the load time history on segment from node B to node C, whereas Fig. 31 i shows the load time history on segment from node C to node D and higher cicvations untd the i
! connection to horizontal piping.
l The peak values reported are as tollows: Segment I A lB ( 5 elements from bottom to top) -
Elem.1 200 lbf. Elem. 2 400 lbt. Elem. 3 - 1000 lbf . Elem. 4 3(XX)lbf, Elem. 5 - 75(X)Ibf.
Segment iB lC 4000 lbt. Segment IC 1D (bcnd included) 800 lbf.
3.3 Horizontal ADS discharme Pining Fig. 32 shows the time history on the horizontal piping trom node E to node 1. m LBF\FT.
Notice that the torces are identical for both lines. The load peak is approximately 650 tht/tt.
MT03-S3C-025, Rev.1 PAGE 20 OF 57 DATE 3 April 1998 MT3S3C25 DOC L
AP600 DESIGN SPECIFICATION WESTINGHOUSE l
J. CONCLUSION I A Simpidied Approach has been used to evaluate the Drag Forces on IRWST Support Column and ADS PIPING during the ADS blow down.
On the basis of VAPORE blow down tests, pressure forcing function time history of Phase B Tests 930 & 330 have been selected.
The condensation phenomenon has been simulated by me of an oscillating bubble in an ir.linite or semi-infinite perfect 11uid pool.
On the basis of a series of described assumptions concerning the position of the condensation bubble with respect to the submerged structure of interest, the velocity and acceleration drags have been computed. , l Only the ACCELERATION DRAG is significant because of the relatively high frequency l content of the sparger forcing function. l The loads are vibratory with the frequency content of the experimental measurements.
The load magnitude depend on the distance between the condensation bubble and the submerged structure of concern.
Time histories of the loads for the vessel head support column as well as for ADS discharge l piping have been computed and presented.
i MT03-S3C-025, Rev.1 PAGE 21 OF 57 DATE 3 April 1998 MT3S3C25. DOC
. AP600
- DESIGN SPECIFICATION WESTINGHOUSE l
l FIGURES
=
1
% l l
1 l
l 1
1 1
l l
. 1 I . '
MT03-S3C 025, Rev.1 PAGE 22 OF 57 DATE 3 April 1998 MT3S3C25. DOC
l
.- AP600 '
. DESIGN SPECIFICATION WESTINGHOUSE
- 1. IRWST SPARbER LOCATIONS AND IDEAL SPARGER BUBBLE ]
1 k
SU66LE ~
SPARGERS CowM N ]
, i . .
.- . \/
s
\> -
,~.>:;N s*g. '{h k&h58- '.m
-- - - I t
~ 4.., w ,t ,o . ,.s , . o, **
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t....-,.
s.,. \g.* %
l u, : r.1 . . . . . . . .I .. : 1
- . r .. Tui>:p ! s-C%d-13'0 A i l I bw.
l SPAR M ' ,
S PARGER.f . > '
/ t
- (f
- --d o n /
i,
,y
, %[
)
1
. 1 MT03-S3C 025, Rev.1 PAGE 23 OF 57 DATE 3 April 1998 I
MT3S3C25. DOC l 1
~
.' AP600 )
DESIGN SPECIFICATION WESTINGHOUSE *
- 2. SUPPORT COLUMN - SPARGER DUBBLE CONFIGURATION I
.\l)S I)lScil.\R(ili VI.R l'iCAL PIPING free surface (el. 336")
-e n .~ _ - -
m
. SUPPORT COLUMN .
$ condensation bubble ,,
/ DIAM = 18" i t radius =4.6' )
/ anule perpendicular line 1 -;.
\
N
- 3,g ,.
PROJECTION: EFFECTIVE FORCE
\ w TOTAL FORCE IRWST FLOUR MT03-S3C-025, Rev.1 PAGE 24 OF 57 UATE 3 April 1998 MT3S3C25. DOC 4
J
\
AP600
- DESIGN SPECIFICATION WESTINGHOUSE '
~ (
- 3. PIPING GEONIETRY AND NODING I
i f
- \
me
_,6 l
i I l
l l
m ff!!!/
^
Ll4 W PRS PL LS300
,RCS PL LM40 MT03-S3C 025 Rev.1 PAGE 25 OF 57 DATE 3 April 1998 MT3S3C25. DOC
(
- ~ ' ~ ~
.- AP600 DESIGN SPECIFICATION WESTINGHOUSE
- 4. ADS PIPING CONDENSATION BUBBLE CONFIGURATION
.t
%,.\l)S DISCHARGE VERTICAL PIPING -
/
/
p condensation bubble )
l at distance =4.6 ft from piping)
S(
etreetis e
, force 7
IRWST Fl.OOR MT03-S3C 025, Rev.1 PAGE 26 OF 57 0 ATE 3 April 1998 MT3S3C25. DOC
AP600
- j
. DESIGN SPECIFICATION WESTINGHOUSE l
S. CLOSED BOX FLOW PATTERN l FA CE .ccia fAcs .
. . !. I. I t t r i _I .I . .
- i , I l 1 1 i i i I i I
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. _ OS s' j i
i MT03-S3C 025, Rev.1 PAGE 27 OF 57 DATE 3 April 1998 MT3S3C25. DOC
, DESIGN SPECIFICATION WESTINGHOUSE *
- 6. IlORIZONTAL PIPING: APPROACH CONFIGURATION
- l l
l l
^
np l i
A HORIZONTAL l l
angle PIPING, i DI AM=16"
,PROJECTI .,_
Y \ i
\
h > 0 1 l )
I l
condensation bubble assumed under the vertical and at the quencher elevation (18 ft)
IRWST FLOOR MT03 S3C-025, Rev.1 PAGE 28 OF 57 DATE 3 April 1998 MT3S3C25. DOC i
l '
) .' AP600 DESIGN SPECIFICATION WESTINGHOUSE
- 7. FREE SURFACE EFFECT AND SINK l.%1 AGE SIN k lH4GE )I e
d l
- l. . , , FRfs - --
.cu.9 f4c.S i ,:
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MT03-S3C 025, Rev.1 PAGE 29 OF 57 DATE 3 April 1998 MT3S3C25. DOC
i AP600 DESIGN SPECIFICATION WESTINGHOUSE
- 8. PHASE H1-TEST 930 PE16 PRESSURE TIN 1E lilSTORY
~
o.30 b
o.ao 0.10 .
ac o.00 0 10 0 20 I
0 00 20 00 40 00 60 Time (s)
MT03 S3C-025, Rev.1 PAGE 30 OF 57 DATE 3 April 1998 MT3S3C25. DOC
- AP600 DESIGN SPECIFICATION WESTINGHOUSE . . .
- 9. PflASE B1 TEST 930 PE16 PRESSURE TIME HISTORY (15 30 S INTERVAL)
, PE16 30 S _b 0.3 0.2 l 0.1 oc 0.0 )
- 0.1
- 0. 2 15 20 25 30 TIME ----SEC MT03-S3C-025, Rev.1 PAGE 31 OF 57 D TE 3 April 1998 MT3S3C25. DOC
AP600 DESIGN SPECIFICATION WESTINGHOUSE ~~
- 10. SOURCE STRENTGH RATE TIME HISTORY FT3/S2
. SOURCE STRENTGH RATE--T930-- ,15-30 SEC b
~
4000 m
2000
=
1 9 l l I
8
'il
)0 0 8
E e
! -2000 i i e
l l
s4000 20 25 30" 15 time s-MT03-S3C-025, Rev.1 PAGE 32 OF 57 DATE 3 April 1998 MT3S3C25. DOC
AP600 DESIGN SPECIFICATION WESTINGHOUSE F 1
- 11. SOURCE STRENTGl! TINIE lilSTORY FT3/S SOURCE STRENTGH --T930-- ,15-30 SEC b 60 <
]
{ 40 m
V T I 20 8 0 d
c I
j -20 ,
E
-40
-60 40 15 20 25 30 j time s- I l
I l
l I
l l
MT03-S3C 025, Rev.1 PAGE 33 OF 57 DATE 3 April 1998 MT3S3C25. DOC i
- J
l AP600 DESIGN SPECIFICATION WESTINGHOUSE
- 12. BUEBLE SURFACE VELOCITY TIME. HISTORY FT/S 1
)
l BUBBLE SURFACE VELOCITY --T930---
4 "lb 3
l 4 2 I
l l
4 i
1 1 o.
l # 0 w -1 o
6 a:
3
- -2
-3 l
"4 10 15" !
0 5 time s-l l l i
MT03-S3C-025 Rev.1 PAGE 34 OF 57 DATE 3 April 1998 MT3S3C25. DOC
- ~
AP600 DESIGN SPECIFICATION WESTINGHOUSE ~~ ~ ~ ' - l
- 14. AD DRAG WITl! REFERENCE TO 5"' ELENIENT (LBF) 1
- TEST 930-PE16-AD_ DRAG 5 ,b l 300C 1
200C l 1000 a
C w
0 l
-1000
.-2000 ~
0 5 10 15 TIME ----SEC MT03-S3C 025, Rev.1 PAGE 36 OF 57 DATE 3 April 1998 MT3S3C25. DOC
I AP600
- ~~
l DESIGN SPECIFICATION WESTINGHOUSE
- 15. VD DRAG WITil REFERENCE TO 5"' ELEMENT (LBF TEST 930-PE16-VD_. DRAG 5 *'b 3
2 1
i Y u.
M 1 1 4 l l
1 0
4
-1
- -2 4 6 8 10 12 14 16 TIME ----SEC l
l l
1 MT03 S3C-025, Rev.1 PAGE 37 OF 57 DATE 3 April 1998 MT3S3C25. DOC
AP600 DESIGN SPECIFICATION WESTINGHOUSE _
\ .
- 16. TOTAL DRAG ON 1" ELEMENT (B1)-(LBF) l f
_ TEST 930-PE16-FORCE 1 b I 300 200 9 l l
100 u.
m 4
0
-100 l , -200 15 ~
0 5 10 TIME ----SEC t
l MT03-S3C-025, Rev.1 PAGE 38 OF 57 DATE 3 April 1998 MT3S3C25. DOC ;
AP600 DESIGN SPECIFICATION WESTINGHOUSE l
l
- 17. TOTAL DRAG ON 2* ELEMENT (B2)-(LBF) 1 l
l l TEST 930-PE16-FORCE 2 400 .~b 300 200 100 l
- u. l C 0 4 l l
-100 l
-200
-300 0 5 10 15
- TIME ----SEC MT03-S3C-025, Rev.1 PAGE 39 OF 57 DATE 3 April 1998 MT3S3C25. DOC
AP600 DESIGN SPECIFICATION WESTINGHOUSE
- 18. TOTAL DRAG ON 3"" ELEMENT (B3)-(LBF)
~
TEST 930-PE16-FORCE 3 _h 80C 600 400 200 u.
C0 4
-200
-400 6
-600
,..r.800 ~ '
0 5 10 15 TIME ----SEC MT03-S3C 025, Rev.1 PAGE 40 OF 57 DATE 3 April 1998 MT3S3C25. DOC L _ _ _ _ _ _ _ _ _ _ _ .
AP600 DESIGN SPECIFICATION WESTINGHOUSE l
1
- 19. TOTAL DRAG ON 4* ELEMENT (B4)-(LBF) J l
l 1
l
. TEST 930-PE16-FORCE 4 " '
b 200C l 1500 1000 5
500 0
-500
-1000
-1500 m'
- 0 5 10 15 .
TIME ----SEC l
l !
MT03 S3C-025, Rev.1 PAGE 41 OF 57 DATE 3 April 1998 l
MT3S3C25. DOC L -
1 l
AP600 DESIGN SPECIFICATION WESTINGHOUSE -- ~
l 1
- 20. TOTAL DRAG ON 5* ELEMENT (BS)-(LBF) 1 TEST 930-PE16-FORCE 5 "b 300C 2000 l
1sEO l
k c 0 l J
-1000 i
.-2000 0 5 10 15 TIME -- --SEC MT03-S3C 025, Rev.1 PAGE 42 OF 57 DATE 3 April 1998 MT3S3C25. DOC
AP600
- DESIGN SPECIFICATION WESTINGHOUSE
- 21. TOTAL DRAG ON 6 ELEMENT (B6)-(LBF) l l
TEST 930-PE16-FORCE 6 200C
_b]
1500
" 1000 500 0
-500
-1000 l
-1500 10 15"'
0 5 TIME ----SEC MT03-S3C-025, Rev.1 PAGE 43 OF 57 DATE 3 April 1998 MT3S3C25. DOC
l AP600 DESIGN SPECIFICATION WESTINGHOUSE
- 22. TOTAL DRAG ON 7 ELEMENT (B7)-(LBF) 4
_ TEST 930-PE16-FORCE 7 _
80C 60C 40C 200 0
-200
-400 .
-600
.;;e00 0 5 lo 15 -
TIME ----SEC MT03-S3C 025, Rev.1 PAGE 44 OF 57 DATE 3 April 1998 MT3S3C25. DOC
( .
AP600 DESIGN SPECIFICALON WESTINGHOUSE
- 23. TOTAL DRAG ON 8 5 ELEMENT (B8)-(LBF) j l
. TW 930-PE16-FORCE 8 b 4 04 )
30( )
20C 10C 0
-100
-200
-300
-400 10 15 -
u 5 BME ----SEC !
l l'
l 1
l
~
MT00 S3C 025, Rev.1 PAGE 45 OF 57 DATE 3 April 1998 MT3S3C25. DOC W
AP600 DESIGN SPECIFICATION --
~
WESTINGHOUSE
- 24. TOTAL DRAG ON 9* ELEMENT (89) .(LBF)
.s l
l
, , TEST 930-PE16-FORCE 9 .
b i 30(
1 l
l 20C 100 l l
1 0
1
-100 l L-200 0 5 10 15d TIME ----SEC MT03-S3C 025, Rev.1 PAGE 46 OF 57 DATE 3 April 1998 MT3S3C25. DOC b
N AP600 DESIGN SPECIFICATION WESTINGHOUSE
- 25. TC //. DRAG ON 1" ELEMENT (NODING: A B)-(LBF)
- T930-FORCE B.1, LBF ,b
, 300 200 100 0
-100
-200 e'
= 0 5 10 15 TIME ----SEC MT03-S3C-025, Rev.1 PAGE 47 OF 57 DATE 3 April 1998 MT303C25. DOC
.c .
AP600
. DESIGN SPECIFICATION WESTINGHOUSE
- 26. TOTAL DRAG ON 2^" ELEMENT (NODING: A-- B)-(LBF) 600 T930-FORCE B.2, LEF _b 400 9 200 4
0
-200 g400 0 5 10 15 "
TIME ----SEC MT03-S3C-025, Rev.1 PAGE 48 OF 57 DATE 3 April 1998 MT3S3C25. DOC
..- AP600 DESIGN SPECIFICATION WESTINGHOUSE I
- 27. TOTAL DRAG ON 3"" ELEMENT (NODING: A B)-(LBF)
T930-FORCE B.3, LBF ,b 1000 I
500 i
0
-500
-1000 15 0 5 10
. BME ----SEC MT03-S3C-025, Rev.1 PAGE 49 OF 57 DATE 3 April 1998 MT3S3C25. DOC l
. i
i AP600 DESIGN SPECIFICATION WESTINGHOUSr
- 28. TOTAL DRAG ON 4* ELEMENT (NODING: A B) (LBF)
I 3000 T930-FORCE B.4, LBF _b 2000 l \
l l
g 1000 0 .
-1000
-2000
" 3000 O
~5 10 10 llME ----SEC l
MT03-S3C 025, Rev.1 PAGE 50 OF 57 DATE 3 April 1998 MT3S3C25. DOC
l AP600 DESIGN SPECIFICATION WESTINGHOUSE --
- 29. TOTAL DRAG ON 5 ELEMENT (NODING: A - C)-(LBF) l
. T930-FORCE B.5, LBF 9
bl 6000 4000 2000 0
-2000
, -4000 F6000 0 5 10 15 "
TIME ----SEC MT03-S3C 025, Rev.1 PAGE 51 OF 57 DATE 3 April 1998 MT3S3C25. DOC
- AP600 ;
DESIGN SPECIFICATION WESTINGHOUSE "-~ ~-" ;
l
- 30. TOTAL DRAG ON 6* ELEMENT (NODING: B -- C) -(LBF) 1 6000 T930-FORCE C , LBF _b a
l 4000 t I
u 2000 i
1 l
0 i i
l
-2000 i 1
1 l
4000 0 5 10 15 "
TIME ----SEC -
MT03-S3C 025, Rev.1 PAGE 52 OF 57 DATE 3 April 1998 MT3S3C25.00C
. AP600 DESIGN SPECIFICATION WESTINGHOUSE
- 31. TOTAL DRAG ON 7* ELEMENT (NODING: C D BEND)-(LBF)
FORCE D , L8F -
600 1 400 200 0
t
-200
-400
\
-600 4 00 0 5 10 15 "
BME ----SEC MT03-S3C 025, Rev.1 PAGE 53 OF 57 DATE 3 April 1998 MT3S3C25. DOC D
c ,
t!
AP600 - I
. DESIGN SPECIFICATION WESTINGHOUSE
- 32. TOTAL DRAG ON A ONE FEET ELEMENT OF HORIZONTAL PIPING (Ibf/ft) l
=
800 T930, FORCE LBF/FT--HORIZ .,-
'b 1
600 400 W
l 200 l
l 0 l
l l -200 i l
I -400
'"-600
=
0 5 10 15 TIME ----EEC l
l MT03-S3C-025, Rev.1 PAGE 54 0F 57 DATE 3 April 1998 MT3S3C25.00C Y
1l' J AP600 I DESIGN SPECIFICATION WESTINGHOUSE l
e --
l I
- 33. PRECC1 IMAGE. PATTERN (8 DIAMONS) meCAL LsNES 08 svuuETaY
/ som LOCATiwo tuaGES. Soa THE scum ecot souNO Aalts
./ -
t .
1 l j
o o o o O O !
O O O o O O e
l
. . . . . e e . ,,
l l
~
e e . . e 1. '.i . . .
$k o o o o o o o o 'O O o o o o O o o o o o o O O o o o j O' o CONTAtNu t eff *tOtKTAL W ALL WALL , v )
e e e o e e 1 a . :,,z, ,
\
. el . . . e e r.p, 3 *. I .
- OCL eOTTOM l
O O o O O O O O O O O O o O j o C O O *O O O o O O O o O O i
e e e . e o e e o e e o e e e e e e e .
o O O O O O l
C O O' O O o 1 e e 1 e
- 5 atAL ver(T exrf sovact a caor.s sectica, oi* one sios os fwe A uua *oot e *. e souaca suAct s+ rwt Aaa a v os at 46 sovact A%o ewar i'. is t *is.a.
C *'"'M s na ans, cast anat N,iumCE MT03 S3C-025, Rev. PAGE 55 OF 57 DATE 3 April 1990 MT3S3C25. DOC
i
.. AP600 DESIGN SPECIFICATION WESTINGHOUSE
- 34. PRECC13-DIMENSIONAL MODELING l
/ /
,/ .' ,.
s' y,/ -
/g 1
Covf AmwCNT p / /
/ s~ s '
(
' 7,'eae
/ ]
' I 5 / /.
7 ,/ g o.
- - - - - $-- ._ g .e !
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4%[
N! -l -*
PCDEKTAL
/ l l
3 ACTUAL SouMC4 AT VENT (Xif e TvescAL suAGE SOURCE
- - SWAGE.TodeOOE C tfT a**C ES . e MT03-S30-025, Rev.1 PAGE 56 OF 57 DATE 3 April 1998 MT3S3C26. DOC
~ ~
- AP600 33, DESIGN SPECIFICATION
. WESTINGHOUSF
- 35. UNIFORM FLOW PAST A STATIONARY STRUCTURE l
1 .- -
l iD l ($
3 l P l o1 3-l U m
2-e 4
7 O
G 4
9 I N
k' N a
- 5'_ _
g "
o l LL '
i ,\ a n '
1 3 a
1 0 3 1 a l
, 2 I l
l l
l MT03-S3C-025, Rev.1 PAGE 57 OF 57 DATE 3 April 1998 l MT3S3C25. DOC I