pressurizer safety valve discharge piping …developed computer code dags (dynamic analysis of...

109
PALO VERDE NUCLEAR GENERATING STATION UNITS 1, 2 and 3 PRESSURIZER SAFETY VALVE DISCHARGE PIPING EVALUATION REPORT January 1983 Prepared by: CE Power Systems COMBUSTION ENGINEERING, INC. Windsor, CT. ~0g070(}>0 83 pgg PDQCK pDR A

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Page 1: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

PALO VERDE NUCLEAR GENERATING STATION

UNITS 1, 2 and 3

PRESSURIZER SAFETY VALVE DISCHARGE PIPING

EVALUATION REPORT

January 1983

Prepared by:

CE Power Systems

COMBUSTION ENGINEERING, INC.

Windsor, CT.

~0g070(}>0 83pgg PDQCK pDRA

Page 2: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

Abstract

The U.S. Nuclear Regulatory Commission (NRC)., in NUREG 0578 Section 2.1.2and NUREG 0737 Item II.D.l, recommended performance testing of PWR safetyand relief valves. One aspect of this recommended program was to evaluatethe adequacy of safety and relief valve discharge piping and supportsystems and determine piping dynamic feedback effects on valveoperability. At the request of PWR owners, EPRI conducted a test program

for PORVs and Safety Valves. One of the objectives of the safety valve

test program was to obtain data that could be used to benchmark analyticalmethods for calculating discharge piping loads.

Results and verified analytical methods from the EPRI Safety Valve Test

Program were utilized for an evaluation of the safety valve discharge

piping system of Palo Verde Units 1, 2, and 3. This report presents theevaluation which was made in response to the aforementioned NRC

recommendation.

Page 3: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

TABLE OF CONTENTS

Secti on Title Page No.

1.0 PURPOSE

2.0 GENERAL APPROACH

2. 1 Hy drau 1 i c Ana 1 ys i s

2.2 Piping Structural Analysis

3.0 PALO VERDE SAFETY VALVE PIPING ARRANGEMENT

3.1 Physical Descriptio'n3.2 Function of System

4.0 APPLICABILITY OF EPRI TEST TO PALO VERDE

SAFETY VALVE PIPING SYSTEM

5.0 EVALUATION OF PALO VERDE SAFETY VALVE

DISCHARGE PIPING

5.1 Hydraulic Forcing Function in Safety Valve

Discharge Piping5.2 Structural Response Analysis of the Safety

Valve Discharge Piping System

5.2.1 Ana lytica 1 Mode 1

5.2,2 Valve Sequence Loading Conditions5.2.3 Loading Combinations and Acceptance Criteria5.2.4 Results of Structural Analysis

11

12

12

13

6.0 SUMMARY AND CONCLUSIONS

7.0 . REFERENCES 25

Page 4: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

APPENDICES

Appendix A: Hydraulic Forcing Functions, Case No. 1-Four Valve Simultaneous Actuation

Appendix B: Piping Support Loads, Gapped Analysis:Case No. 1 - Four Valve Simultaneous Actuation

Page 5: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

1.0 PURPOSE

The purpose of this analysis is to evaluate the structural adequacy of thepressurizer safety valve discharge piping and support systems during safetyvalve actuation. Piping feedback effects on valve operability are also'determined. Dynamic loadings on the system occur when the safety valves

are actuated.

2.0 GENERAL APPROACH

The general approach used'in generating the hydraulic forces and structuralresponse to safety valve actuation is described in this section. A briefdescription of the computer codes used is also presented. The method ofanalysis is consistent with the methods used in the EPRI Safety Valve Test

program, as described in Reference (5).

2.1 Hydraulic Analysis

Pressurizer safety valve discharge transients present complex fluid-structure interaction problems. The fluid and structural portions of theanalysis can be decoupled,to allow determination of piping hydraulic forceswhich serve as input loadings to the structural analysis. The calculationof fluid-induced piping forces is accomplished using a two-step procedure.The first step is to determine the transient hydraulic state. The

hydraulic data such as pressure (P); density (p), and fluid velocity (v)during the transient are required in order to calculate the hydraulicforces. The geometrical data such as pipe flow area (A), length (L),volume (V), and orientation of the piping are'also required. The second

step is to determine the hydraulic loads by utilizing the transienthydraulic data.

The fluid forces acting on a piping system can be obtained from a momentum

balance. These piping forces have two basic components:

Page 6: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

wave force,

and static surface force [I - +P(o =)]Ah4

where n is a unit vector normal to flow area. The computer code

RELAP5( ) was used to calculate the safety valve downstream pipingtransient response, while a post-processor of RELAP5, the REFORC( ) code,was used to calculate the hydraulic force-time history.

The RELAP5 code is a thermal-hydraulic program which solves a set offive conservation equations (2-mass, 2-momentum and 1-ener gy equation)describing the two-phase and two-component fluid. Nonhomogeneity and

thermal nonequilibrium of either phase are accounted for in the code.

The two-fluid formulation and advanced critical flow correlation of RELAP5,

in conjunction with efficient programming techniques and very generalmodeling capabilities provide a tool to evaluate pressure relief system

transients. In using RELAP5, the system is divided into volumes calledcontrol volumes. The flow paths between the. control volumes are calledjunctions. The user identifies the system initial conditions such as

pressure, temperature, and quality in the volumes and the mass flow rate atthe junctions. The code calculates the system transient response

downstream of valves after the initiation of safety valve opening.

REFORC is an interface computer code designed to couple RELAP5 with thestructural analysis code. REFORC post-processes the output from RELAP5,

which is a time history of the flow and state variables, to generate thehydraulic forces at user-specified locations. The output from REFORC can

include either wave or static surface (blowdown) forces or a specifiedcombination of these forces. The output format is compatible with the

input requirement of the DAGS ( ) structural analysis code.

Page 7: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

2.2 Piping Structural Analysi s

A time history structural analysis of the Palo Verde pressurizer safetyvalve discharge piping system has been performed to evaluate the structuralintegrity of the discharge system during safety valve actuation. A threedimensional structural model was developed which includes the pressurizer,safety valves, inlet and discharge piping, and. all piping supports. The

method of analysis used is similar to that used in the EPRI/CE Safety and

Relief Valve Test program.

The basic structural model was defined using the STRUDL computer code. The

STRUDL code is a publicly available, well verified code that is widely used

in dynamic piping analyses. The STRUDL code was used to generate the mass

matrix and linear stiffness matrix for the structure. The consistent mass

matrix of the entire structure was reduced by kinematic condensationtechniques to those degrees of freedom which represent the loading and

significant natural frequencies of the piping system. The stiffness matrixwas condensed to the'mass degrees of freedom plus 'support degrees offreedom.

The STRUDL calculated mass and stiffness matrices were then input to the CE

developed computer code DAGS (Dynamic Analysis of Gapped Structures),Reference (3). The DAGS computer code has been verified for the dynamic

analysis of piping systems with non-linear or gapped piping supports. The

STRUDL stiffness matrix was then modified by'the DAGS code to include, theg'apped supports which are present in the Palo Verde discharge system.

The valve actuation forces are hydraulic forcing functions, and were

calculated by the RELAP5 computer code as described in the previous'section. These forcing functions are applied as input loadings for thedynamic structural analysis.

A more detailed description of the structural modeling and analysis ispresented in Section 5. Typical results of the structural analysis are

presented in Appendix B.

Page 8: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

3.0 PALO VERDE SAFETY VALVE PIPING ARRANGEMENT

3.1 Physi cal Descri pti on

e

The pressurizer safety valve discharge piping system extends from the

safety valve outlet flange to the quench tank inlet nozzle. The Palo Verde

system has four safety valves which are independently connected to thepressurizer nozzles at the top head of the pressurizer through separate 6-

N

inch schedule 160 lines. The valves are Dresser model 31709NA. This model

has a 6" inlet and 8" outlet. All four valves have the same setpressure,2500 psia. The portion of the piping system upstream of the safety valves

is classified as guality Class I, Seismic Category I and ASME SafetyRelated Class 1 piping. Downstream of the safety valves, the fourdischarge lines continue independently as 8-inch and 10-inch schedule 20

lines in series and join separately with an 18-inch comnon header which

continues to the quench tank. The portion of the piping system downstream

of the safety valves is classified as guality Class IV, Seismic Category V

and non-safety related piping. A schematic of jurisdictional boundaries ofthe Pressurizer Safety Valve Discharge System is shown in Figure 3-1.

3.2 Functi on of System

The function of the safety valves is to provide overpressure protection ofthe Reactor Coolant System. The pressurizer safety valve discharge linesreceive the discharge from the safety valves and provide the flow path tothe quench tank. The Design Basis Events which result in peak pressure

greater than the opening set pressure (2500 psia) for the safety valves

are treated in the FSAR. The valve inlet condition for each of these

events and the sequence of events for each event are presented in Reference

(4). The hi ghest peak pressure among those events was 2587 psia for the

Loss of Feedwater, Inventory event. The greatest pressure ramp rate was 105

psi/sec for the Loss of Condenser Vacuum with Fast Transfer Failure. The

valve inlet fluid was limited to saturated steam in all cases.

Page 9: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

8"-sch 20

6"-sch 160

PT A

qQ~c>

g% r

PT BA; OUALITY CLASS I

SEISHIC CATEGORY IASHE CLASS 1 PIPING

PT A

B: QUALITY CLASS IV

SEISHIC CATEGORY IV

SNSI B31.1.0 PIPING

PTB~

FIGURE 3-1

Schematic of JurisdictionBoundaries of Pressurizer Safety Valve

Discharqe System

OUENCH

YANK

Page 10: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

4.0 APPLICABILITY OF EPRI TEST TO PALO VERDE SAFETY VALVE PIPING SYSTEM

One of the objectives of the EPRI Safety Valve Test Program was to obtainsufficient piping hydraulic load data to permit verification of computer

codes and methods which may be utilized for plant unique analysis of safetyvalve discharge piping systems. The RELAP5 computer code was selected forthis verification purpose by the Electric Power Research Institute. The

evaluation of the performance of RELAP5 was obtained through comparisons ofcalculated with experimental structural and hydraulic response data.Experimental data from five EPRI safety valve tests were. compared withRELAP5/MOD1 calculations to evaluate 'the capability of the code todetermine the fluid-induced transient loads on downstream piping (see

Reference (5)).

The upstream accumulator fluid condition was steam for four selectedtests and slightly subcool ed liquid for the fifth. The fluid flowtransients through the safety valve included steam only, water only, coldwater from the loop seal followed by steam and hot water from.the loop seal

followed by steam. The calculated results for both discharge pipepressures and support loads compared well with measured test data. Results

of the calculations were reported in detail in Reference (5).. The

conclusion of the study is that RELAP5 is applicable for safety valve

discharge forcing function calculations.

5.0 EVALUATION OF PALO VERDE SAFETY VALVE DISCHARGE PIPING

The hydraulic load forcing functions which are applied as input loads forthe piping structural analysis were obtained from RELAP5/REFORC. The

approach made in generating these forcing functions is described in Section

5.1. The structural analysis is presented in Section 5.2.

5.1 Hydraulic Forcing Function in Safety Valve Discharge Piping

The Palo Verde safety valve discharge piping system was modeled with 142

control volumes linked together by 143 junctions. Figure 3-1 shows the

overall system configuration between the pressurizer and the discharge pipe

Page 11: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

exit. Figure 5-1 shows the corresponding RELAPS model between the safetyvalve and the pipe exit. Four control volumes were independently used torepresent the pressurizer upstream condition for the four safety valves.One hundred thirty seven control volumes were used to represent the safetyvalve downstream piping.

Two parametric studies were conducted to determine the sensitivities ofcalculated piping segment load to the computing time step size and thenumber of control volumes which comprise the segment. The major criterionfor selection of the maximum time step size is that no wave front may

traverse the length of a control volume in one time step. A time stepsize of .00025 seconds was found to be adequate since the use of otherselected smaller RELAP5 time step sizes did not significantly affect thecalculated results. Two RELAP5 models, consisting of 142 and 186 controlvolumes to represent the discharge piping system, were used to conduct a

hydraulic nodalization study. Results from the two models were in closeagreement. Based upon these comparisons, the 142-volume model was

determined to adequately predict both the shape and the magnitude of the

forcing functions.

The following conditions were used in calculating the forcing functions:

1) The initial condition of the pressurizer including piping upstream ofthe safety valve was assumed to be saturated steam at 2600 psia. The

highest peak pressure among the design basis events is 2587 psia.This pressure of 2600 psia was held constant during the transientca l cu1 ati on.

2) The EPRI test recorded steam flow rate for the 31709NA valve is630,000 lb/hr at the valve inlet pressure of 2600 psia. This flowratewas used in the RELAP5 ca 1 culati ons.

Page 12: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

3) The discharge piping initial condition was assumed to be air at 100'F

and 14.7 psia with a relative humidity of 80 percent.

4) The magnitude of dynamic hydraulic loads developed in a safety valvedischarge piping system depends on the valve operatingcharacteri sti cs. A ramp opening time of 12 msec was used in this

'nalysis. This, opening time, which was recorded in Test 603 of theEPRI program, was the fastest valve opening time among the testresults for the Dresser 6 x 8 valve. Valve opening times are reportedin Reference (7).

A total of six different valve opening sequence cases were'un using the142-volume RELAP5 model. These cases were selected as representative ofpossible valve actuation sequencing for consideration in the pipinganalysis. Four cases listed below were used for the structural response

ana.lysi s

Case 1) All four safety valves were actuated simultaneously.

Case 2) Two valves (Valves Nos. 1 and 2 in Figure 5-1) were opened

first. When these valves were full open at 12 msec, the othertwo valves were opened simultaneously.

Case 3) Two valves (Valves Nos. 1 and 2) were opened first, and the othertwo valves were opened simultaneously after 50 msec.

Case 4) Two valves (Valves Nos. 1 and 2) were opened first, and the othertwo valves were opened after 100 msec.

The other two cases listed below were not processed through the structuralanalysis because 'review of the results indicated they were not design

limiting when compared to the four force cases mentioned above.

Case 5) One valve (valve No. 1) was opened first, and the other three

valves were opened after 12 msec.

Case 6) Three valves (valve Nos. 1, 2 and 3) were opened first, and the

other valve was opened after 12 msec.

Page 13: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

Figures A-1 to A-31 show the time histories of the dynamic hydraulicforcing functions for the case of four valves opening simultaneously at thesame pipe force segments as specified in Figure 5-1. The direction ofdeveloped pipe force is coaxial with a straight pipe segment. The force ispositive when directed toward the pressurizer. For the collinearly joinedpipe segments, a net summation force is given instead of forces developedin each pipe segment. The forces presented in Appendix A, Figures A-1.to A-30 are the wave forces and the force in Figure A-31 is the thrust force,i.e., the sum of wave and blowdown force.

Page 14: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

. 'oX"

o+J(

5/QH0 4

o++r

P/p

8O+

ib~O +

yb0+

S/quo. L

dg

ID4

4

+D

00

ATMOSPHERE

4Og

~OJ ~ +8

4

4~4 O0

5/g QO. 200 f

Fu 5/pl0.2

gd f

. p x,

/Og

/0b

0

"00/ /d~

oJ(

0+

4>

n

k

FIGURE 5-1. RELAP5/MOD1Noda1ization Diagram ofPa1o Verde Safety Va'tveDownstream Piping System

10

Page 15: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

5.2 Structural Response Analysis of Safety Valve Discharge Piping System

5.2.1 Analyti ca 1 Model

A computer, plot of the Palo Verde discharge piping system is shown on

Figure 5.2. This model includes the pressurizer, the four primary safetyvalves, the inlet piping for each valve, and the discharge system. The

discharge piping consists of 8 inch piping which expands shortly after each

safety valve discharge flange to a 10 inch line. The 10 inch piping feeds

into the main 18 inch discharge piping header which is, in turn, connected

to a quench tank. A simplified schematic is presented in Figure 3-1.

Piping schematics in Figures 5-3 to 5-8 describe the structural model and

support locations. The locations of hydraulic forcing function applicationare described in Figure 5-9.

The effect of gapped supports has been considered in the dynamic analysis.For each loading condition considered, a dynamic structural analysis has

been performed both with and without gaps. A standard linear analysis was

performed. for the zero gap analysis. In the gapped analysis, the gaps arelocated on a best estimate basis considering the effects of dead weight and

thermal expansion on the piping system. Where deadweight and thermal

expansion tend to move the piping through a gap, the gap is assumed closedand preloaded in that di rection, and fully open in the opposite di recti on.

Gaps sizes are determined from detailed support drawings where possible.Otherwise, the gaps are estimated as follows:

Su ort T e Ga Clearance

Snubbers

Pipe Clamps

Frames or Stops

All Others

+ 1/32+ 1/16+ 1/16

0

When a support is comprised of several of these components, the gaps are

combi ned.

Page 16: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

5.2.2 Val ve Sequence Loading Conditions

The hydraulic forcing functions during valve discharge have been analyzedfor four hypothetical valve actuation sequences. These forcing functionsare determined from the RELAP5 hydraulic analyses, as previouslydescribed. The four valve actuation sequences considered in the structuralanalysis are:

2.

3.

4,

All four safety valves opening simultaneously.Two valves open simultaneously, the remaining two valves

open 12 milliseconds later.Two valves open simultaneously, the remaining two valves

open 50 milliseconds later.Two valves open simultaneously, the remaining two valves

open 100 milliseconds later.

Other valve actuation sequences were analyzed hydraulically, and the

forcing functions for 511 cases were judged to be enveloped by these fourcases for the structural analysis. As previously stated, each loadingcondition was analyzed for a linear, zero gap system and as a gapped system

for a total of eight dynamic structural analyses.

5.2.3 Loading Combinations and Acceptance Criteria

For discharge piping, the actuation of a pressurizer safety valve isconsidered an ASME Level C (emergency) event. This catagorization ofsafety valve discharge is in accordance with the recommended guidelinesof the EPRI Safety and Relief Valve Piping Subcommittee (Reference 6), and

is based on the extremely low probability of actual safety valve

actuation. The valve actuation loads are combined with sustained normal

operating loads which include dead weight and operating pressure.

The applicable design code for the discharge piping is ANSI 831.1.

Equation 12 in ANSI 831.1 is applied to calculate membrane plus bending

piping stress. The allowable-stress for the piping is 1.8 Sh. This

value is 50/ higher than the normal stress limit of 1.2 Sh, and isin agreement with the Level C criteria of the ASME code.

12

Page 17: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

The bending moment acting on the safety valve discharge flange due topiping feedback effects is calculated for all four safety valves for each

of the eight structural analysis cases previously described. The peak

value of bending moment is compared to the as-tested bending moment in theEPRI test program.

Piping support reacti ons are obtained by combi ning the valve actuationloads with normal operation loads. These include dead weight and thermal

expansion. The calculated peak loads for each support are compared to the

support load rating.

5.2.4 Results of Structural Analysis

All calculated stresses in the discharge piping system satisfy the 1.8

Sh allowable stress criteria of ANSI B31.1.

The maximum calculated bending moment on any safety valve discharge-flangeis 117,200 inch-lbs. This is much less than the EPRI/CE as-tested value of473,000 inch-lbs for the same model valve, as reported in Reference {7).

Figures B-1 through B-48 represent piping support reactions for the fourvalve simultaneous actuation load case. These reactions include theeffects of gapped supports. A listing of calculated maximum support loads

lis presented in Table 5-1. These maximum values represent the maximum loadat each'upport from all load cases analyzed.

Page 18: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

SC

'3 ' ~ 01

05SLOv 6fjgS;0„.60'S I I

30~

30-3

413

SI) )

$ 16'%

S'11611LS

23 26 3

2356 3

239

I31

31

36

I!0

420233421

2330

225

22S

1322

251

22

21S

!IO>A~LO COQIIOINII'll.'f6<EIIFE~ 0.0 Sf= 144 ~ 502= 34.9

213

210

20

id820S

Oggh

Q'h

FIGURE 5-2

P - PRESSUR/ZER SAFETY YALVE 01SCHFIRGE PIPINO

201

Page 19: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

20

19,21

17

16,18

X.

13

15

12 14

Support1

23456789

101112131415161718192021

Type„ STP

SNBSPRSTRSTRSNBSTRSPRSPRSNBSTPSNBSNB

'STRSNBSTPSTP'TP

'STP

.STPSTP

DirectionX

Y

Y

ZX

Y

ZY

YZX

YX

ZY

XY

ZXY

Z

10

9

Reactor Drain Tank

fIGURE 5-3Line 002 - 18 Inch Header

~ Gapped Support Joints

Page 20: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

Pres ur izer

26

00 900

270o23

24

180o28

29

Support

2223242526272829

Type

STPSTPSNBSTPSNB

SNBSNB

SNB

Direction

FIGURE 5-4

SV1 - Line 004 - 10 Inch Discharge Pipe

~ Gapped Support Joints

Page 21: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

Pressurizer

00 90o

270o 180o40,41

43

44

Support Type Direction40 STP X41 STP Z42 SNB Y43 STR X44 SNB Z

~ Gapped Support Joints

FIGURE 5-5

SV2 - Line 103 - 10 Inch Discharge Pipe

Page 22: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

00goo

30

31,32

270

Pressurizer

180o

33

34

Support

3031323334

Type

SNBSTPSTPSNBSNB

Direction

0 FIGURE 5-6

SV3 - Line 006 - 10 Inch Discharge PipeP

Gapped Support Joints

Page 23: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

35,36

00

90o

270 180o

Pressurizer

37

38,39

Support

3536373839

Type

STPSTPSNBSTPSTP

Direction

~ Gapped Support Joints

FIGURE 5-7

SV4 - Line 008 - 10 Inch Discharge Pipe

Page 24: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

0090o

45270

180o

47,17

20,48

Support454617474820

Type

KEYKEYKEYKEYKEYKEY

DirectionZX

Y

ZX

Y

Pressurizer Keys~ Gapped Support Joints

FIGURE 5-8

PRESSURIZER

20

Page 25: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

Point A

7)

I2 j3$

35)

32

i4 +Point B

Point A

W7

j—P01nt B

ll

FIGURE 5-9

Applied Loads From Hydraulic Analysis

'71

Page 26: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

Table 5-1

Summary of Support Loads

(2) Valve Act. Valve Act. plus(3)Line Support iso. Direct. Type Only (lbs) N.O. loads (lbs)

Moment in Pipe (4)at

Support(in-1 bs )

17 27818 27819 27835 27A36 27433 . 27B34 27C32 26C31 '6929 69A30 69B28 26826 26727 26725 26A23 44

21 101

X

Y

Y

Z

X

Y

ZY

Y

ZX

Y

X

ZY

X

Y

ZX

Y

Z

STPSNBSPR

STRSTRSNBSTRSPRSPRSNBSTPSNBSNBSTRSNB

STPSTPSTPSTPSTPSTP

219377898

018334

546832082

546300

76062465810081

935910247

823210063

53512296284048021

12490

11007 267049623 7898

18 015167 2113811962 546823008 32082

8890 546351 043 0

8328 760631948 26183

8768 1008110647 935923707 10247

9785 82325203 14390

12433 535118804 2436315120 840413048 8021

9448 16815

1100796231134

151671321923008

9628376916308328

319488768

1064726242

97855203

15921188042307114982

9448

194,000

364,000307,000261,000217,000217,000177,000191,000184,000269,000

360,000266,000

777,000

335,000

16 58A

15 5818 56B14 5612 5311 51A17 51

X

ZY

X

ZY

ZX

STPSTPSNB

STPSNB

SNB

SNB

SNB

6616 145035894 05034 57159319 135489905 69119666 101895673 64288657 9182

66168990503493199905966656738657

146060

571513981

691110189

64289182

108,00076,000

158,00082,00093,000

114,000149,000

22

Page 27: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

TABLE 5-1 (continued)

Suama ry of Support Loa ds

Valve Act. Valve Act. plusLine Support iso. Direct. Type Only (lbs) N.O. loads (lbs)

Moment in Pipeat

Support(in-1bs )

13 16815 169

12 66A'1

166

Y

X

ZZ

X'SNB6201 2941 6201 2941

STP 34798 41578 36892 41578STP 10215 3406 14479 3406SNB 3559 4747 3559 '747SNB 4202 3558 4202 3558

89,000154,000

113,000109,000

14 24A

12 234ll 225

STP 3933 10082 3933 13798STP 28471 5623 32446 5623SNB 14542 8091 14542 8091STP 16812 8288 17714 8288STP 970 6036 970 7275

234,000

193,000147,000

103 11 30

12 3114 3415 34A

STP 563 0 5057 0STP 2999 9576 2999 10195SNB 5787 5196 5787 . 5196STR 5526 7445 5526 8628SNB 3231 3445 3231 3445

67,000

125,000204,000195,000

Pzr.Keys

0090o180'70'ey

3517 3738 3517 3738Key 3283 3201 3283 3201Key 2661 2792 2661 '2792Key 2332 2084 2332 2084

N/AN/AN/AN/A

1. Directions as shown on Bechtel drawings: North is in the minus X direction.

2. Type: STP - stopSNB - snubberSTR - strutSPR - spring

3. Loads are imposed on the supports by the piping system.

4. Moments list'ed're due to valve actuation only.

23

Page 28: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

6.0 SUMMARY AND CONCLUSIONS

The Palo Verde pressurizer safety valve discharge piping system has been

evaluated with respect to safety valve actuation. The hydraulic pipingforces generated upon valve actuation have been calculated by the RELAP5

computer code, which was benchmarked for this application in the EPRI

Safety and Relief Valve Test Program. These hydraulic forces were appliedas input loadings to a dynamic structural analysis of the discharge pipingsystem. The structural analysis was performed with the STRUDL and DAGS

computer codes, and included the effects of gapped supports on the dynami c

response characteristics of the discharge system.

The results of this analysis indicates that the feedback effects of the

piping system will not adversely affect valve performance. The calculatedpiping imposed loading on the safety valves are below those loadings testedin the EPRI program and under which the valves operated satisfactorily.

The calculated piping stresses due to valve actuation plus normal operatingloads are within the allowable stress levels of the applicable codes.

The loads at each support location have been determined and are listed inTable 5-1. These support loads have been evaluated and are within the load

capability of the appropriate support system.

24

Page 29: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

7.0 REFERENCES

1. RELAP5/MOD1 Code Manual, NUREG/CR-1826, EG86, Idaho, March, 1982.

2. REFORC, A Computer Program for Calculating Fluid Forces Based on

RELAP5 Results, EDS Report No. 01-0650-1194, February,'982.

3. "Dynamic Analysis of Piecewise Linear Structures", J.S. Lien, R. P.

Kassawara, H.B. Smith, Combustion Engineering, presented at ASCE

Second Specialty Confe'rence on Structural Design of Nuclear PowerPl ant Faci lities, December, 1975.

4. EPRI Report NP-2318-LD, "Valve Inlet Fluid Conditions for PressurizerSafety and Relief Valves in Combustion Engineeping Designed Plants,"Apri 1, 1982.

5. "EPRI Report NP-2479-LD, "Application of RELAP5/MODl for Calculation ofSafety and Relief Valve Discharge Piping Hydrodynamic Loads,"Intermountain Technol ogi es, 'Inc., March 1982.

6. EPRI Letter to Utility Contacts - Piping Subcommittee members, datedNovember 5, 1981.

7. EPRI Report NP-2628-LD "Safety and Relief Valve Test Report",September, 1982.

25

Page 30: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

APPENDIX A

HYDRAULIC FORCING FUNCTIONS

Case Number One: Four Valve Simultaneous Actuation

Page 31: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GORE 0-1RR I KONR S/V SISCHRRGE PIPING ANALYSIS

PIPING FORCE NO 1 ( 142 NODE-NOOEL .DT= 2SHS)

4.0000

3.0000

2 0000

1 0000

0 0000

-1.0000

T IM . CONGS

Page 32: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F IGURFARIZONA S/V DISCHARGE PIPING ANALYSIS

PIPING FORCE N0.2 ( 142 NODE-MODEL DT=.25MSJ

7.0000

6.0000

5.0000

4.0000

3 0000UJ

2 0000

i.0000

0 0000

0000

'INE.SECONOS

Page 33: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F IGURE A-3ARIZONA S/V DISCHARGE PIPING ANALYSIS

PIPING FORCE NO 3 (142 NODE-MODEL,DT= 2bNS)

6.0000

5.0000

4 0000

M 3,0000

2 0000

1 0000

0.0000

—1 0000

T SECONOS

Page 34: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I 0 A I)ARIZONA 5/V 0 I SCHARGE P.IP ING ANALYSI 5

PIPING FORCE NO. 4 =- ( 142 NODE-MODEL DT=.2BHS )

3.0002

2.5002

2 0001

1 .5001

1.0000LLJ

.5000

0.0000

5000

—1 0000

TltiE,SECONDS

Page 35: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GURE 0-5 ~

ARIZONA 5/V DISCHARGE PIPING ANALYSI5P IP ING FORCE NO ~ 5 ( 142 NODE-HODEL ~ DT= ~ ZSNS )

6.0000

5.0000

4.0000

3.. 0000

LLI

2 0000

1.0000

0 0000

—I 0000

Tl 'ECO GS

Page 36: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GU -6RR I 70NA 5/~J 0 I 5CHARGE PIPING ANALY5I 5

P IP ING FORCE N0.6 ( 142 NODE-MODEL, DT= . 2bMS )

5 0000

4.0000

3 0000

2 0000

1 0000

0 0000

—1 0000

~T NE SECONOS

Page 37: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GURE A-7ARIZONA S/V D I SCHARGE PIPING ANALYSI S

P IP ING FORCE N0.7 ( 142 NOOE-MODEL. DT= ~ 25MS)

2 0001

1.5001

1.0000

.5000

0 0000

— .5000

-1 0000

TI ECONOS

Page 38: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F IGU A-8ARIZONA 5/V D.I SCHARGE PIPING RNALYS I 5

P I P! NG FORCE NO. 8 ( 142 NODE-MODEL DT=.25HS)

6 0000

5.0000

4.0000

M0

EIJ

3.0000

2.0000C)

1 0000

0.0000

—1.0000

TIME SECONDS

Page 39: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

. F, I GURE A-9,'ARIZONA S/V DISCHARGE PIPING ANALYSIS

PIP ING FORCE NO 9 ( 142 NODE-HOOEL DT=.25MS)

3.0002

2.5002

2.0001

1 5001

1 0000LLI

5000

0.0000

5000

-1 0000

TI E'CONOS

Page 40: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I G: A-10RR I ZONA S/V D I SCMRRGE P.t P I NG RNAL YS I 5

P IP ING FORCE NO 10 ( 142 NODE-MODEL DT=.2SHS)

7.0000

6.0000

5 0000

4 0000

3.0000

I 2 0000

1 0000

0.0000

—1.0000

TIME SECONGS

Page 41: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GURE A:jj.ARIZONA S/V DISCHARGE PIPING ANALYSI S

PIPING FORCE NO l 1 ( 142 NODE-HODEL DDT= ~ 2585)

4.0000

3 0000

2.0000

OJ

o 1.0000

0 0000

-1.0000

T SECONOS

Page 42: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GUR A-12ARIZONA S/V DISCHARGE PIPING ANALYSIS

P IPING FORCE NO. l2 ( 142 NODE'-NOOEL OT= . 25NS )

4 0000

3.0000

2 0000

6) 1 0000

0 0000

—1 0000

TlNE.SFCONGS

Page 43: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GURE A-0ARIZONA. S/V DISCHARGE P IPING ANALYSIS

PIPING FORCE NO l3 (142 NODE-MODEL. O'T=.25MS l

5.0000

4 0000

3 0000

2.0000LIJ

1 0000

0.0000

-1 0000

Tlt1 CONOS

Page 44: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F! GU '-14ARIZONA S/V DISCHARGE PIPING ANALYSIS

PIPING FORCE NO 14 ( 142 NODE-NOOEL. OT= 2SHS j

0

7 0000

6.0000

5.0000

4 .0000

3.0000

2 0000

1.0000

0.0000

—1 0000 'INE

SECONGS

Page 45: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

FIGURE A-15AR I KONFI S/V OI SCHARGE P IP ING ANALYSI 5

PIPING FORCE NO IS (142 NODE-MODEL DT= 2SNS)

4.0000

3.0000

2 0000

LLI

o 1 0000

0 0000

—1 0000

I ECO OS

Page 46: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GURE A-16AR I ZONA 5/V DISCHARGE PIPING ANALYSIS

PIPING FORCE NO l6 ( 1<2 NODE-MODEL DT=.2bNS)

6.0000

5.0000

4.0000

3.0000

ELI

2 0000CI

1.0000

0.0000

-1.0000

TINE SECONOS

Page 47: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

FIGURE A-17ARIZONA 5/V OlSCHARGE P IP ING ANALYSIS

PIPING FORCE ND 17 ( 142 NOOE-HOOEL. OT= 2SHS)

4.0000

3.0000

2 0000

o 1 0000.

0.0000

—1 .0000

T SECONOS

Page 48: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GUR -18AR I ZONA 5/V DISCHARGE P'I P I NG ANALYSIS

P tP lNG FORCE NO 18 ( 142 NODE-MODEL DT= 25MS)

4.0000

3.0000

(A(L

ILJLJ

2.0000

c3 1 . 0000

0.0000

—1.0000

TINE SECONOS

Page 49: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GURE A-19ARIZONA S/V DISCHARGE PIPING ANALYSIS

P IP ING FORCE NO 19 (1<2 NOOE MOOEL OT=.25MS)

5 0000

4 0000

3 0000

2.0000LJJ

1 0000

0 0000

—1 0000

SECONOS

Page 50: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GUR A-2Q'RIZONA5/V 0 I SCHARGE P.IP ING ANALYSI 5

P IP ING FORCE NO 20 ( 142 NODE NOOEL DT=.2SNS)

4.0000

3 0000

2.0000

UJ

63 1 . 0000

0 0000

—1.0000

T I t1E . SECONOS

Page 51: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GURE A-2j.RR I ZONR 5/V DISCHRRDE P IP ING RNRLYS I 5

P JP ING FORCE NO 21 f 142 NODE MODEL. OT= 25MS )

4 0000

3.0000

2 0000

o 1.0000

0.0000

-1.0000

T SECONDS

Page 52: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GU -22ARIZONA S/V DISCHARGE PIPING RNALYS I 5

PIP ING FORCE N0.22 f 142 NODE MODEL DT= 25HS)

7.0000

6.0000

5.0000

4.0000

3.0000UJ

I 2 0000

1 0000

0.0000

—1 0000

TINE 5ECONOS

Page 53: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GURE A-23AR I ZONA 5/V OI SCViARGE PIPING ANALYS 1-5

PIPING FORCE NO.23 (142 NODE MODEL,DT=. 25MS)

4.0000

3.0000

2.0000P

LLI

o 1 0000

0.0000

—1 .0000

ECONOS

Page 54: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

FIGURE A-24ARIZONA S/V DISCHARGE P.I P I NG ANALYSIS

PIPING FORCE NO.24 (142 NODE MODEL DT=.2bMS)

20 000

15 000

10.000

5 000LLI

0.000 kluV)i~p,

-5.000

—10.000

T 1ME SECOt'JDS

Page 55: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GURE 4-25ARIZONA S/V DISCHARGE PIPING ANALYSI,S

P IP ING FORCE NO ~ 25 ( 142 NODE-f10DEL. DT= 25MS)

20.000

15 000

10 000

5.000LLJ

0.000

-5 000

—10.000

seep~as

Page 56: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I G E A-26ARIZONA 5/V DI5CHARGE: PIPING ANALYSIS

P lP ING FORCE NO ~ 26 ( 142 NODE-.HODEL. DT=-. 2bNS )

10.000

8.000

6.000

000

2 000

~ 0.000

-2 000

NE SECONDS

Page 57: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GURF A-27ARIZONA 5/V DISCHARGE PIPING ANAL,Y515

PIPING FORCE NO 27 ( 142 NODE-t1ODEL. DT= ~ 2SHS )

20.000

18 000

16.000

14.000

12 000

10.000

8.000

6.000

4.000

2 000

0.000 ooooo

oooooCU

,SEC NOS

oooooo

Page 58: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GUR -28ARIZONA 5/V OISCHARGE PIPING ANALYSIS

P IP ING FORCE NO ~ 28 ( 142 NOOE-MOOEL.OT=. ZbMS )

20.000

16 000

10 000

5 000LLI

0.000

-5 000

—10 000

TIME. SECONDS

Page 59: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

FIGURE A-29ARIZONA 5/V DI SCMARGE P. IP ING ANALYSIS

PIPING FORCE NO.29 ( 1.42 NODE-MODEL. DT= ~ 2SHS)

20.000

15 000

10.000

5 000LLI

0.000

-S 000

—10 000

T SECONOS

Page 60: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F IGURARIZONA S/V DISCHARGE PIPING ANRLYS!5

P IP ING FORCE NO.30 ( 142 NODE-MODEL..DT= 25HS)

20 000

15 000

10 '000

5.000

0.000

-5.000

—10 000

T I ME . SECO OS

Page 61: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

F I GURE A-31RR I ZONA S/V 5 I SCHRRGE PIPING RNRLYSI 5

P IP ING FORCE NO.31 (142 NODE-MODEL .DT=.25MS)

40 000

30.000

20 000

LLI

c3 10 000

0 000

Page 62: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

APPENDIX 8

PIPING SUPPORT LOADS, GAPPED ANALYSIS

Case Number One: Four Yalve Simultaneous Actuation

Page 63: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

";. 1. 999

l'3 9'30-

l 4 '.390

9 997 -.

4.997-

—-002-C3

) inC)

—Ib ~ OQ~I

-~0 00'-

-2f) . 001

-30 000-

i)JU„- —, .0O..C)" -ln,nn,'

(J

(:)'n('J

C)C)rn

(3in

C)C)

T [MF. ( SF.CONGS )

FORCE IH GAGS GAP NUMBER 1

f-Al 0 '.RDf: PER O'J DISCARD('E PtPrHG SUPP T LOADS f 8/QAi'j — 0 VALVFS StMULT NFOUS

Page 64: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

"'3 .'3'39-

2 4 ~ !39'3

1'3. 998

1k '98I

'3.997-(i I

4.997-

— .0O2-laJ

-t) .002n

—!0 002

- 1,'i ~ 002

-20.001.

-,,'OOlL

-3n.non~

C3:nC3

nC3c'>

nC'J

C)C)

TIME ( SECONDS )

FORCE IN DAGS GRP NUHBF.R 2"ALO VER[lF PER SV 015CHtlRGE P! P ING SUPPCPT L OAOS ! H/GAP 1

— 4 VALVES 5 IMULTANFOUS

Page 65: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

'3 '3'3" -.

a d.997-

002»J

a=- f) ~ 002-

nIl -10 002

-1 l) ~ 002-

-."0 001

-2b 001

-ln,OOO

n n nai')

nU)AJ

C)C3

C).inCf)

nn

T I ME ( SF.CONDS )

FORCF IH DACS GAI'UMBER 3I-BIO;1;RDf.. ZR 51 DISCIJRRCI-: PtPING SUPP RT LOADS (8/GAP) - 0 VAL.iJFS SIMUI~ ~ i'IFOUS

Page 66: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

2'.3 . '3'3'3-

:? -) 9!3'3-

'3 . 9'30 .

. l 4 .9'.30-

9.937

!3'37--

- -002

(„- -t) ~ 002(.")

— l 0 002-

1r) 00~

-20 Apl

') 00 l..

-3C 000

C)li)(:)

nC)

C)C)

T IMF. ( Sf:CONOS )

FORCF. IN BAGS) GAP NIJNQFR 4 xgxg)(agate(y(PAl,p VFRnr: PZB SV OISCHRRGF. PIPING SUPPCRl LOAOS fWtGAP) — 4 VAI..VFS SIVUI.TANFouS

Page 67: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

2'3 . 3!3'3

I 3. $ 90

14.99

9.997-

1 ~ '397 -I-

— ~ 002-

'-I fi ~ 00

-20 001

-2t) ~ 001

-~o,oool

T I l1E ( SECONDS )

FORCF. IN DAGq GAP NUBBER 5 xxxxwxxwmxPAI n VERI3f'lR 5 J 0 I SCHRRGE P IP I NG SUPPORT t OADS f 8/GRP ) - 0 YAI YFS 5 IMULTAREOUS-

Page 68: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

.')0 000

20 000-

10 000

0.000-(..)

- I 0 ~ ()00

nL)C)

nC'J

nnIY)

(3n

-20 000-

-30 000

-40 ~ 000-

-hO.OOO~

T I NF ( Sf'.CONDS )

wxxx~xxxxx FORCF lf'J DRGS GAP l'JUNBER6'HI

0 VFROf-. PER SV DISCHARGE P IP 'NG SUPPORT I. OADS < 8/GA" ) — 4 VALVES 5It1ULTA><FOUS

Page 69: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

Y

"9.999-

21. 999

I'.l. 99A

14.998-

9.997

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(.3ln

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(3in in

('j(.3

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wxxxx33ixxw33( FOPCF IN DRCS GRP NiJHOFR 7f Al JFRI)f PZR

'0 I SCHRRGF. P < P >NG 513PPC'RT l. ORBS < 8/GRP ) — 0 VRLVFS S IHUI.TAi'>F005

Page 70: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

1'3 ~ 998-

1 0 ~ !398

9 -997

1. 397

0 0 ')

-', .no."-D

-1 0 002

—1 b no p.

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n

TIVE (SF.CohJOS 1

FORCF. IN BROS ORP NUNBE R 0r~l'n;IFRIlf: pzp s,i DlscHleGF. ptt <NO suppoRT L0Ros fw/0Rpi - ~ vRLvEs sINlll TR~JFous

Page 71: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

(i I

QI

Y

9 ~ 9'37

~i ~ '3'37-

— -002-l&

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-ZO OO I.

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C)iAC)

C)n C>n C)~J)CU

C)C)rn

T I NF ( SF.CONDS )

FORCF. IN BAGS GAP ljuHBFR 9PAL 0 V. RBF: PZR SV 0 I SCHARGF: P I P I WG SLIP!'ART L OADS < II/GA~ ) — 0 VAL.VFS S INULTA"!FOU5

Page 72: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

, n.O00

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T I (ATE ( Sf.CONDS )

FORCF. !N DRGS GR" NUNOF.R llPRl 0 "F:f'.Of". P '.8 SV I' SCH I'~GF. P >P ING SUPPORT I. ORDS < 8/GRP ) — 4 VRI VES 5 I JUL.TRRFOUS

Page 73: Pressurizer Safety Valve Discharge Piping …developed computer code DAGS (Dynamic Analysis of Gapped Structures), Reference (3). The DAGS computer code has been verified for the

3 - '3'3Q-

c3 l3 (3t

1'3 - '390

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