Text

Discusses Status of EPRI MOV Performance Prediction Program. List of Meeting Participants & Viewgraphs Used by EPRI Encl
	ML20059G809
Person / Time
Issue date:	09/02/1993
From:	Thomas Scarbrough; Office of Nuclear Reactor Regulation
To:	Norberg J; Office of Nuclear Reactor Regulation
References
	NUDOCS 9401250306
	Download: ML20059G809 (76)
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UNITED STATES

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g NUCLEAR REGULATORY COMMISSION y

j W ASHINGTON, D. C. 20$55 SFJ 021%3 MEMORANDUM EOR: James A. Norberg, Chief Mechanical Engineering Branch Division of Engineering k\\

THRU:

I dmund J. Sullivan, Jr., Section Chief Pumps and Valves Section Mechanical Engineering Branch Division of Engineering v

FROM:

Thomas G. Scarbrough Pumps and Valves Section Mechanical Engineering Branch Division of Engineering

SUBJECT:

STATUS OF EPRI M0V PERFORMANCE PREDICTION PROGRAM i

r On August 19 and 20, 1993, R. Steele of the Idaho National Engineering i

Laboratory (INEL) and I attended a meeting at Wyle Laboratories in Huntsville, Alabama, to discuss the status of the testing being performed by the Electric Power Research Institute (EPRI) in support of the EPRI Motor-0perated Valve (MOV) Ferformance Prediction Program.

I also toured the.Wyle Laboratories' test facility and inspected some of the valves ~ tested by Wyle for the EPRI program. Representatives of the Nuclear Management and Resources Council (NUMARC) and two valve vendors were in attendance during the meeting. is a list of the meeting participants. provides the viewgraphs used by EPRI at the meeting.

EPRI has tested 35 gate, globe and butterfly valves in 63 sequences at its test loop facilities.

EPRI will be performing a small number of additional tests at its test loop facility in Huntsville.

EPRI plans to obtain test data for an additional 30 valves to be tested in nuclear power plants.

EPRI has contracted Kalsi Engineering to test a butterfly valve with multiple disc designs.

EPRI stated that its tests demonstrated valve friction coefficients for gate valves as follows: 0.3 to 0.6 for cold water pumped flow, with values of 0.75 and 0.9 for~ two valves; 0.34 to 0.41 for hot water pumped flow; 0.35 to 0.80 for hot water blowdown; and 0.25 to 0.64 for steam blowdown. Most. valve vendors used a valve factor of 0.3 for flexible wedge gate valves and 0.2 for parallel disc gate valves in sizing motor operators. Therefore, the EPRI test results indicate that the thrust required to operate gate valves could be three times greater than the thrust predicted by the valve vendors.

The EPRI testing confirms the limited testing program conducted by INEL for the NRC--

Office of Nuclear Regulatory Research in 1989.

EPRI reported that valve friction tends to decrease for particular valves with increasing differential pressure, which lends support for linear extrapolation of differential pressure test results.

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James A. Norberg 2

EPRI reported that several gate valves were damaged during testing.

The damaged valves included a six-inch Anchor Darling gate valve; two six-inch Borg-Warner gate valves; a twelve-inch Borg-Warner gate valve; a six-inch Crane gate valve; a two and one-half inch Edward gate valve; a six-inch Velan gate valve; a ten-inch Velan gate valve; a six-inch Walworth gate valve; and a ten-inch Edward gate valve.

I indicated to EPRI the importance of resolving the issues raised by the performance of these valves and the need for the applicable valve vendors to attend a planned NRC/EPRI meeting in October 1993 to discuss the EPRI MOV program.

From an overview of the EPRI preliminary results, it is appears that a significant percentage of the valves did not receive adequate preconditioning, demonstrated unpredictable behavior, or were damaged during the tests.

The extent of these problems raises the concern as to whether an adequate number of valves demonstrated predictable performance for use as a basis for the EPRI methodology.

During the meeting, EPRI stated that it would attempt to use all possible information from its test data.

EPRI stated that its testing showed the thrust required to operate globe valves was generally consistent with the valve factor used by valve manufacturers.

However, some of the test results revealed valve factors greater than the 1.1 typically used by globe valve vendors. Also, a two-inch Edward globe valve tested under blowdown conditions demonstrated a valve factor of I.87 with damage on the valve internals.

I informed EPRI that this information will need to be addressed in regard to the generic acceptability of grouping of globe valves.

EPRI stated that its testing revealed torque requirements to operate butterfly valves to be bounded by vendor predictions.

However, butterfly valves at several nuclear power plants (for example, Catawba, Palo Verde, and Salem) have demonstrated torque requirements that exceed vendor predictions.

I l

informed EPRI that it will need to reconcile its test results with operating experience of butterfly valves.

EPRI stated that it determines the point of flow isolation based on a hydrostatic test to establish the stem position when flow begins to occur during an opening stroke.

EPRI adjusts the stem position for closing to account for the stem-to-disc connection gap.

EPRI uses the greatest thrust requirement to overcome differential pressure up to this stem position to determine the valve friction coefficient.

EPRI assumes the highest differential pressure observed during the test regardless of the stem position where the greatest thrust requirement occurs. This results in a lower valve friction coefficient than would be determined if the actual differential pressure at the point of greatest thrust was used in determining the valve friction coefficient. Also, the EPRI test results revealed that it is not possible to determine accurately the point of flow isolation based on the thrust diagnostic trace.

EPRI stated that it had not observed differences in thrust requirements for valve operation between valves installed in horizontal pipes with the stem either vertical or horizontal. This finding differs from operating experience in nuclear power plants.

I informed EPRI that it will need to ensure that its

f James A. Norberg 3

test results are applicable to nuclear power plant environments.

EPRI indicated that flow effects appear more significant for opening valve strokes thamfor closing valve strokes.

Valve size might be a primary factor t

in this effect.

j One large gate valve was damaged when the valve disc was forced through the seating area such that leakage occurred above the disc.

Bill Knecht of Anchor-Darling stated that he had expected the limit switch to be used as backup protection for the torque switch in such instances. Mike Eidson of Southern Nuclear stated that he was not aware of any licensees that use limit switches as backup protection for such situations. This issue needs to be explored further.

EPRI plans to submit a topical report for NRC review in April 1994.

EPRI intends to submit test reports in advance of the topical report to allow the staff to raise questions with EPRI early in the review process. This early review is essential for the NRC staff to complete the review of the EPRI topical report during the Spring of 1994. However, EPRI has been delayed in 1

completing its test reports. The staff has requested EPRI to make available i

the raw MOV test data such that the staff can select those tests that will be sampled for detailed review.

EPRI does not wish to release the test data until its sponsoring licensee review group has evaluated the data. While I agree with EPRI's concern regarding verifying the quality of the data before its release, I do not believe that the staff will be able to support EPRI's schedule unless we have access to the data before December 1,1993.

The staff will be meeting with EPRI, NUMARC and participating licensees on October 6 and 7, 1993. Among the topics that I indicated need to be addressed are:

(1) the delay in completing the EPRI test reports; (2) the damage to some gate valves when closing under blowdown conditions which could result in unpredictably high thrust requirements; (3) test results that indicated some globe valves to have thrust requirements greater than predicted by the valve vendor; (4) resolution of staff comments provided to EPRI in December 1992; (5) the use of a friction coefficient to describe the thrust required when the valve is damaged during the valve stroke (i.e., an unpredictable valve);

(6) the number of valves that demonstrate predictable performance that can be used for developing the EPRI methodology; i

(7) several valves tested early in the EPRI program that might not have received a sufficient number of preconditioning strokes to stabilize the valve friction coefficient; I

i

James A. Norberg 4

(8) the applicability of EPRI's method of predicting stem friction coefficient to dynamic conditions at the point of valve closure; (9) the responsibility of EPRI and NUMARC to emphasize to licensees the need to respond to EPRI test findings (including potential reports under 10 CFR Part 21);

t (10) the need for licensees to have justification for their selection of flow isolation from diagnostic data-(11) EPRI's plans for the use of INEL test data; (12) resolution of issues raised from valves damaged or revealing extremely high thrust requirements during testing; i

(13) EPRI's plan to not distinguish between valve manufacturers in its methodology; l

(14) the applicability of the butterfly valve testing by Kalsi to other types and sizes of butterfly valves; 1

(15) thrust requirements for valves installed in different orientations; (16) the use of limit switches as backup protection for the torque switch in certain valves; and (17) EPRI's plans to ensure that licensees understand the test data and the proper method to apply the data.

I consider the trip to Wyle Laboratories to have been a worthwhile effort.

I believe that the personnel at Wyle Laboratories are making every effort to ensure that the MOV test results are reliable.

l T L G. 2 Thomas G. Scarbrough Pumps and Valves Section Mechanical Engineering Branch Division of Engineering i

Enclosures:

As stated C

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- i ENCLOSURE 1 i

ATTENDANCE AT STATUS MEETING 0F EPRI MOV PERFORMANCE PREDICTION PROGRAM i

AT WYLE LABORATORIES ON AUGUST 19 AND 20, 1993 NAME ORGANIZATION T. Scarbrough NRC/NRR-i NUMARC C. Callaway J. Hosler EPRI P. Damerell MPR M. Eidson Southern Nuclear j

W. Knecht Anchor / Darling i

J. Farrell Velan

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- r R. Steele INEL j

R. Hall Wyle Laboratories 1

D. Kessler Wyle Laboratories _

j J. Stubbert Wyle Laboratories C. Thibault Wyle Laboratories I

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EPRIINPD EPRI Mov Performance Prediction Program FLOW LOOP TESTING PRESENTATION TO USNRC Wyle Laboratories l

Huntsville, Alabama August 19,1993 John Hosler Operations & Maintenance Technology 45VGMSK/jp 4

i

EPRl/NPD FLOW LOOP TESTING Scope Schedule Data analysis techniques Preconditioning Approach / Philosophy i

l Results to date l

l Operations & Maintenance Technology n

... -..., -,. -. ~ -. _

EPRl/NPD -

SCOPE OBJECTIVES 1.

Obtain test and inspection data (both valve and operator) over a range of size, pressure, AP, and flow conditions to validate the MOV performance prediction methodology.

2.

Directly measure valve performance over a range of parameters (e.g.,

flow rate, media, temperature AP, etc.) which bound typical design basis conditions 3.

Study selected MOV operational enhancements 4

4.

Demonstrate performance of new valve designs 1

3 Operations & Maintenance Technology 45VGWSK/jp

EPRl/NPD SCOPE TEST PROGRAM I

i Testing is complete on 35 valves in 63 sequences at 4 Wyle/Siemens flow loop facilities to support the EPRI Performance Prediction Methodology Program. Two sequences remain to be performed.

j, 29 flex or solid wedge or parallel disc gate valves ranging in size l

from 2-1/2 to 18 inch and 150 to 1500 lb. class i

4 globe valves ranging in size from 2-1/2 to 10 inch and 300 to 1500 Ib class s

2 butterfly valves; 6",150 lb. class 30 add'l valves will be tested in-situ in power plants 30 Butterfly parametric configurations are being tested at KEl flow loop to study the effects of disc shape, upstream disturbance and scaling Operations & Maintenance Technology 4svawsut

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cv TABLE 1 FLOW LOOP TEST MATRIX 35 VALVES /65 TEST SEQUENCES No.

Velve Menufacturer Size ANSI Limitorque Ambient Ambient 450*F 500*F Set.

Set.

Alternate Type (Inch)

Class /

Actuator Water Water Water Water Stea m Stea m Confi-Meterial 15 FPS 50 FPS 15 FPS Blowdown 200 FPS Blowdowri guration SMB-(Note 8)

(Note 5)

(Note 1)

(Note 2)

Testing Type (Note 4)

MAX DP MAX DP MAX DP MAX DP MAX DP MAX DP Notes 1

FWG Anchor Derting 3

300 cs 00 740 2

FWG Anchor Der 8ng 6

150 ss 000 250 3

fWG Anchor Der 8ng 6

900 cs 0

1800 1800 1200 1200 4

FWG Anchor Der 8ng to 300 cs 0

740 8,C. F S

FWG Anchor Derting to 900 es 2-150 1800 6

FWIG Ansar Derene 18 300 ce 2

500 7

FWG Born Wemer 3

1500 cs 00 2500 2500 8

FWG Borg-Wemer 6

150 cs Rotork 250 9

FYlO Borg Wemer 6

1500 es 1

1800 1200 10 FWG Borg-Wemer 12 300 cs 1-25 500 13 fWG New Valen 2-1/2 1500 es 000 2500 2500 2500 14 FWG Crane 6

900 cs 0

1800 1800 1200 15 FWG Welworth/Aloyco 4

150 so Rotork 250 16 FWG Anchor Darling 3

900 cs 00 1800 17 FWG Pacific 10 150 cs 000 250 18 FWG Pacine 4

150 cs Rotork 250 19 FWG Poweg 6

150 cs 000 250 21 FWG Rockwe8 2-1/2 900 cs 000 5 1800 23 FWG Valen 6

150 cs 000 250 250 24 FWIG Valen 6

900 cs 0

1800 1800 1200 1200 1200 1200 25 f4IG Valen 10 300 cs 0

500 26 fWG Veien 10 900 es 2

1800 1200 29 FWG Welworth 6

150 cs Rotork 260 30 FWG Wahoorth 6

900 cs-0 1800 1200 31 INIO Welworth 12 150 cs Rotork 250 34 FWG Westinghouse 3

1500 es 00 2500/750 0

41 RX)

Anchor / Darling 6

900 cs 0

1800 1200 1200 43

!MG Edwards to 900 cs 2

1800 1200 44 Gabo Borg - Womer 6

900 ce 2

1800 1800 48 Gabe Rodwe8/ Edwards 2

1500 es 00 2500 2500 2500 49 Gabo Valen 2-1/2 1500 so 00 2500 50 Gabe Anchor Der 8ng to 300 es 2

500 D

54 IFhr Pratt 1400 Sym 6

150 cs 000 HOBC 150 55 EFhr Pratt 1200 Single O/S 6 150 cs 000

-HOBC 150 D

10(

FWG Poweg 14 600 es 500 02 MATRIX 1/JFRjp

NOTES FOR TEST MATRDC Alternate Confieuration Testing: In addition to test sequences shown on the matrix, selected valves will be tested with ambient water 15 FPS for the following conditions:

A.

These MOV's will be tested to confirm preconditioning methods up to 5 test sequences per valve).

B.

These MOV's will be tested with an upstream elbow parallel to stem (flow from above) at zero diameter (i.e., immediately upstream of the mating flange).

C.

These MOV's will be tested with the stem in a horizontal orien'tation with the pipe run horizontal (with straight inlet configuration).

D.

These MOV's will be tested with th? flow direction reversed (from that used in the nominal test).

E.

These MOV's will be tested with the an elbow perpendicular to stem and parallel to stem at zero diameters upstream, and with an elbow perpendicular to stem at 3 diameters and 5 diameters upstream.

F.

These MOV's will be tested with an elbow perpendicular to the stem at zero diameter upstream.

C.

Test to 750 psid (closures) and to 2500 psid (openings).

Notes:

1.

Upstream and downstream pressures for the 450*F water (non-blowdown tests) shall be high enough to prevent flashing downstream of the test MOV.

2.

Refer to Task 2 description for a discussion of required blowdown capacity.

.I 3.

The maximum DP specified for each MOV in this table is the DP across the test MOV when it is fully closed. The maximum flow (corresponding to the specified velocity) occurs when the test MOV is fully open.

4 The actuator sizes shown are preliminary and will vary based on undervoltage j

specified at time of purchase. It is expected that a limited number (approximately 5) SB and SBD type actuators will be substituted for SMB actuators. It is expected that a limited number (approximately 5) of Rotorque actuators will be substituted for SMB actuators.

l 5.

30-35 FPS for butterfly valves.

6.

12-13 FPS for 18" butterfly valve.

183N/JFH/ip

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i

EPRl/NPD SCOPE 1

FLOW LOOP FACILITIES (Wyle & Siemens) 1.

Low pressure, cold water pumped flow at Wyle Laboratories, Huntsville, Alabama. 6" valves @ 250 psi.

2.

latermediate pressure, cold water blowdown (simulating pumped flow) at Wyle Laboratories, Huntsville, Alabama.12" valves @ 500 psi,10" @

i 740 psi.

i 3.-

High pressure, cold water and hot water blowdown (simulating pumped flow) and hot water and steam blowdown at Wyle Laboratories, Norco, l

California. 6" valves @ 1800 psi,3" @ 2500 psi.

4.

High pressure, cold water blowdown (simulating pumped flow) and steam l

blowdown at Siemens/Kwu, Karlstein, Germany. 10" @ 1800 psi,18" @

500 psi.

i Operations & Maintenance Technology

EPRl/NPD i

SCOPE i

{

TEST CONFIGURATIONS I

Pump flow - simulates opening or closing against the head of an l

upstream centrifugal pump with some specified downstream resistance l

Accomplished in each facility by holding test valve upstream pressure nearly constant and providing a throttle in series to limit flow l

Blowdown - valve is opened or closed against a storage vessel of hot water or stream whose pressure remain. essentially constant and whose l

piping has low flow resistance 4

9 l

Operations & Maintenance Technology.

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Temp.

Stroke Description Direction

(% Nom.)

(% Max.)

"F 0

Static OC 0

0 Amb Leak Test C

100 100 Amb Inspection O'

Static CO O

O Amb 1

Static OC 0

0 Amb 2

Static CO 0

0 Amb in situ O

O O

Amb 3

Flow OC 33 33 Amb 4

Flow CO

-33 33 Amb 7

Flow OC 67 67 Amb 8

Flow CO 67 67 Amb 11 Flow OC 100 100 Amb 12 Flow CO 100 100 Amb 15 Static OC 0

100 Amb 16 Static CO 0

100 Amb 17 Static OC 0

0 Amb 18 Hydro CO 100 100 Amb 19 Static OC 0

0 Amb 20 Static CO 0

0 Amb 21 Static OC 0

0 Amb LeakTest C

100 100 Amb 22 Static CO 0

0 Amb Inspection

4 4

s HOT WATER BLOWDOWN TEST SEOUENCE

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AP P

Temp.

Stroke Description Direction

(% Nom.)

(% Max.)

'F How 1

Cold static OC 0

0 Amb=

0 f

Cold leakage C

150 150 Amb 0

2 Cold static CO 0

0-Amb 0

i 3

Cold static OC 0

0 Amb 0

4 Hydro open CO 100 100 Amb 0

5 Hot static OC 0

0 500+

0 6

Hot static CO 0

0 500+

0 i

7 Hot pressurized OC 0

100-531 0

8 Hot pressurized CO O

100 531 0

9 Hot pressurized OC 0

100 531 0

Hot leakage C

100 100 531 0

10 Hot mini stroke C-Mid 100 100 531 0

11 Hot pressurized Mid-O O

100 531 0

12 Hot blowdown OC 100 100 531 B/D Hot leakage C

100 100 531 0

l 13 Hot staHe CO O

0 500+

0 14 Hot statid OC 0

0 500+

0 15 Hot static CO O

0 500+

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e TEST SEQUENCE FOR STEAM TESTING STROKE DESCl4PTION DIRECTION DP P

TEMP FLOW COMMENT 0a COLD STATIC ELEC.

O->C 0

0 COLD 0

NO DAS*

COLD LEAK TEST C

100 100 COLD 0

NO DAS i

0b COLD STATIC ELEC.

C->O O

O COLD 0

NO DAS 1 COLD STATIC ELEC.

O->C 0

0 COLD 0

2 COLD STATIC ELEC.

C->O O

O COLD 0

3 COLD STAllC MANUAL" O->C 0

0 COLD 0

i 4 HYDROPUMP C->O 100 100 COLD CONDITION TESTSECTION TO HOT O

O 100 HOT NO DAS 5 HOTPRESSURIZEDELEC.

O->C 0

100 HOT 0

6 HOTPAESSURIZEDELEC.

C->O O

100 HOT 0

6a HOTPRESSURIZEDELEC.

O->C 0

100 HOT.

O NO DAS HOT LEAK TEST C

100 100 HOT 0

NO DAS 7 HOTMINISTROKE C-> partial O 100 100 HOT

-0 EQUlUBRATE MOV DP TO ZERO, P TO 100%

7a HOTPRESSURIZEDELEC.

Partial 0->O O

100 HOT 0

NO DAS 10 BLOWDOWNCLOSURE O->C 100 100 HOT B/D l

HOT LEAK TEST C

100 100 HOT DEPRESSURIZE UPSTREAM AND DOWNSTREAM PIPING WITH TEST MOV CLOSED.

11 HOT STATIC ELEC.

C-> partial 0 0

0 HOT 0

1 COOL DOWN OVERNIGHT INTERNALINSPECTION partial 0 0

0 COLD 0

NO DAS IF UNDAMAGED AND WITH EPRI APPROVAL-CONTINUE 11a COLDSTATIC partial O->O O

O COLD 0

NO DAS

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RE ESTABUSH HOT CONDITION O

O 100 HOT 0

12 HOTPRESSURiZED O->C 0

100 HOT 0

13 BLOWDOWNOPEN 0->O 100 100 HOT B/D COOLSYSTEM TO AMBIENT 16 COLD STATIC ELEC.

O->C 0

0 COLD 0

17 COLD STATlO ELEC.

C->O O

O COLD 0

18 COLD STATIC ELEC.

O->C 0

0 COLD 0

NO DAS COLD LEAK TEST C

100 100 COLD 0

NO DAS TESTING COMPLETE

NO DAS NO DATA ACQUISITION.

- ONLY THE WEDGING /UNWEDGING PORTION OF THE STROKE NEEDS TO BE MANUAL 50TBL/WSK/jp l'.

l EPRl/NPD l

DATA CHANNELS i

1 Stem thrust Spring pack displacement I

Stem torque Spring pack farce Stem position Switch timing (5) i Valve upstream pressure Motor speed i

Valve downstream pressure Motor voltage (3 phases) l Valve differential pressure Motor current (3 phases) i Valve bonnet pressure Motor power i

Valve under disc pressure Motor power factor l

j Valve downstream total pressure Valve temperature l

Flow rate Fluid temperature i

l Operations & Maintenance Technology

EPRl/NPD DATA ANALYSIS TECHNIQUES 1

Data sheets are completed on each test stroke to document the values of key parameters at specific " events" in the stroke.

l Operations & Maintenance Technology 45VGWSK/p

EPRI Gate Velva Tcat Analy 13 Data Sheet

/

yei,e,

Test oss. es-1 -n yest Time /zce2ca Test # 8/ -/ - ###

7' 3 -//

Stroke Direedon 0

-7' C Test Descript!on

/6 //I /40 % A P Velve Mean Seat Diameter I.ES in.

Data File Efe/F Data Set

/7 Analyzed by: NUdV /e, Motor Current Start Time' 2 'Yi f

M UJ Verified by:. Y-l /19 $

Motor Current Stop Time'

- - 1. 3 Contactor Dropout Time' 55 sess. Idio s ase.

Packing Load at Running W/#

b.

M M #a' d"W Wde*'e Venturi / Supply Temp.

g,,

.F a.=,

,,,a n,- s-,

Test Valve inlet Temp.

83 '

'F Cloned to Open

~

Time Thrust Torque SPDISP aseen Mean App App i

(sec)

(stu)

(ft-ib)

(lig upe==a DP mek seem P m s(Pold PSB E

n j

}

A. At cracking" l

B. Just after cracking j

C. Max after cracking 4

D. Running (No DP)

E. Limit SW Trip I

F. At Flow initiation J

Open to Closed 1

Time Thrust Torque SPDISp aseen Mean App App (sec)

(ib.)

(ft-Ib)

(irQ W

DP.

Disk Stem i

Pee (pete PSID n

p A. Running (No DP) 4.32o - 933.7 7.66 a.oeas 7d/.5 0.75 i

8. Maxprortointiehsedyng 11.15 6

-f#77.V J2.92 A ** f3 745.5 nr, t 43/6 1280

)

C. At initial wedging

/f.ty3 -3fft.# yg,yp 4o&ff 71 5,8 M2.y Yt.6E-17.1 1 O. TS Trip *

/9.WS -s,27.6 6f.66 e./7J8

.l3 01 E. Max after wedging 19.526

-87Y6.9 7d.sy

.1854 (l31 F. Final 70.472 -872t3 44.2, d.Iff/

0 tii

}

G. At flow isolation r7,543 -337/.3 2e.3o

a. nti

-7 9 4, #

764.z.

353

. It 51

v

.ne...., - e,.,,e,

.ne y vm

- v-, w w - = wm er,

,e er

-w wv.,

-.7.wew.,-mwr,,-,#,,w

...-i-.--ew,w,.w--m*---=.---.-%.,we-a.-,-wemor,+,-

..-,-.-w-,..

.-.+=--.,--w.-

i h

j Typical s

g Oosing t

Thrust d

Trace c-T = T - P A, + P,A, + PAP,Ag(cas 9 ; sin 8)

A A

s'

.i i

' g, j

Typical opening I

e "Ihrust Trace T = To + PoA, - PgA, + pAPgAg(cos 0 + p sin 6)

Opening Stroke T = Stem Thrust,Ib.

AP = Different pressure, psi P = Upstream pressure, psi Disk coefficent of friction

=

A = Stem area,in.2 9

Half disk angle s

=

A = Disk mean seat area,in.2 o

Stem p = (24FS ces a - d ces a tan a)/(24FS tan a + d)

FS = Torque / thrust, ft.

a = Half thread angle d = Stem OD - P/2, in, 1hreadlead angle a =

p = Pitch,in.

- Stem k = Stem coefficient of friction i

n.

.,n.n

,., - - +.. -

cw-

,-a a

1_

J O

1 2

S C B E

O L

2 2 3 9 0

3 4

2 2 6

)

a3 (C I

i

~

)p N

O 9)

K 9

1 sa C L E4 ee 7

cs R

0 EM

= aE 8

i B

C s a

u R

5 aS 1

/

2 4 3

5 7 2 4 8 7 3 n

R

- 4 7 n

)c 0 8 n

(

2 O

}

7 10 S

1 C B

)

w E L e

E 3

C m S

n V

3 1

E 4 7 S =

3 m

5 3 5 =

O P

c T

4 6

M R-1 P

D

(

1 h

O O

R H

O 0

0 O

0 0

O 0

0 T

0 0

O 0

0 M

2 4

e_

8 0

t i

d 1

U H

b T

~

4 l,

,,i\\

i f

.i1

i i.

l i

1

4 EPRl/NPD Globe Valve Apparent Valve Factor k

Fi. cx + Fe + /(Amn.) AP Fa (Ibs)

=

a Where:

4 Fa= Stem thrust i

Fact = Packing friction load (Ibs) i F = Piston Effect load (ibs) f = Valve factor (dimensionless)

(A

)= Average area of the orifice (in ) (mean seat) i AP = Pressure difference across the valve (psi) l Operations & Maintenance Technology.

1 l

4sven som 1

i i

i EPFil/NPD PRECONDITIONING APPROACH / PHILOSOPHY 3

Preconditioning of Flow Loop Test Valves l

Objective Precondition (age) test valves prior to test to eliminate stroke effect (reach " plateau" level) 3 j

Flow lopp parametrics would be unaffected by stroke effect l

Apparent would be conservative -

4 Assumption that plant valves may eventually see several l

strokes and reach the " plateau" level Approach t

Short stroke (~ 10%) open/close MOV in test loop with DP and very low cold water flow until apparent reaches " plateau" level l

DP to be based on max test DP or DP resulting in a contact stress of 20 ksi on seats, whichever is less l

I I

Operations & Maintenance Technology 45VGWSK/jp 1

i i

j i

i i

APPARENT DISC COEFFICIENT OF FRICTON

)

VALVE # 16, PRECONDITIONING 0.8 z

0.7 9

H 0.6 o

}

if 1

0.5 s

0.4

.M 4

z 0.3

^

l E

.nF 0.2 m

1 O

a i

0 0.1 a

0 0

100 200 300 400 500 000 700 800 90 1000 STROKE NUMBER l

e OPEN A

CLOSE s

I I

i

- - ~ ~.

T. f.~ a ".*

_m.

PREllMIRRY i

l i

4 1

IIUNTSVILLE COLD WATER PUMP FLOW LOOP Test Results for Gate Valves Velve Preconditioning Number Thrust et TST

% Change Torque et TST

% Change V;lve Menut.1 Average of Apparent Disk p Stem p at TST Avg of 0 DP Avg 100% to Avg of 0 DP Avg 100% to No.

Size pi pf Strokee Mem.

AP Min.

Max.

(Ibs.)

Avg. 0%

(f t.*lbs.)

Avg.0%

2 AD/6 0.05 0.145 94 0.287 50.5 0.13 0.134

-9244 0.6 129.8 1.1 8

BW/6 0.325 0.52 98 0.924 81.9 0.083 0.11

-9652 11.3 93.6

-1.6 15 A/4 0.27 0.19 128 0.297 93 0.13 0.141

-5152

-0.3 62.5

-1.9 18 P/4 0.147 0.171 85 0.361

_ 91.7 0.074 0.104

-5496

-0.9 57.1 1.8 23 V/6 0.209 0.354 147

.510/.603*

dG. t s 264.8 0.098 0.124

-10346

-1.2 137.5 2.8 29 VV/6 0.144 0.156 17 0.452 88.2 0.089 0.116

-8284

-10.9 90.2

2.9 Comments

. Valve #2 Fully opened / closed on all strokes, no damage Valve 88 High apparent p under study, fully opened / closed on a!! strokes, no damage Valve #15 Fully opened / closed on all strokes, no damage Valve #18 Fully opened / closed on all strokes, no damage V:!ve #23 Cantilevered Guides bend at 250 psid/50 ft/sec, fully opened / closed on all strokes Va?ve #29 No damage, fully opened / closed on aa strokes, used as pathfinder Legend:

,b Aloyoco AD. Anchor Darling 8% Borg Wamer P.- Pacific V. Volan W. Walworth

- Before guides bent /After guides bent s

46TBLIWSK/jp

HUNTSVILLE INTERMEDIATE PRESSURE PUMPED FLOW SIMULATION TEST LOOP PRELIMINARY RESULTS for Gate Valves Seat Precenditioning (O/0 No. of Precond. Max AP V

Apparent Disc p Valve No, MFG / Size / Type pi pf Strokes Psid Ft/Sec Temp Open Close Comments 4

A-D/10/ Gate

.23/.22

.291.39 200 630 15 M

0.33 0.36 4

A-D/10/ Gate n/a n/a n/a 650 15 M

0.33 0.37 Note A 4

A-D/10/Gato n/a n/a n/a 635 15 M

0.41 0.39 Note B 4

A-D/10/ Gate n/a n/a n/a 630 15 M

0.41 0.39 Note C 10 B-W/12/ Gate

.43/.44

.66/.67 110 350_

15 M

0.65 0.66 Note D 10 B-W/12/ Gate n/a n/a n/a 433 15 M

0.66 0.62 to B-W/12/ Gate n/a n/a n/a 636 15 M

0.63 _

0.56 Note E 17 Pacific /10/ Gate

.43/n/a

.44/n/a 200 250 15 M

0.5 0.45 25 Velan/10/ Gate

.29/.29

. 5/. 5 180 740 15 M

0.49 0.52 Note F 31 Wal/12/ Gate

.201.22

.38/.39 350 250 15 M

0.45 0.47 OCMENTS Note A Stem Horizontal Note B Elbow from side Note C Elbow from top Note D Wear on interior surface of one body guide--no seat damage Note E Heavily scratched at 4:30 and 720 positions on disc and seat-leaked 1 ml/ min Note F No torque arm s

47 TOL/WSK/;p

NORCO FLOW LOOP TESTING PRELIMINARY RESULTS for Gate Valves Seat Preconditioning (DlO No.of Precond.

Max AP V

Temp Apparent Discp Valve Ns. MFG / Size / Type pi pf Strokes Psid Ft/Sec

'F Open Close Comments 1

A-D/3/ Gate 0.12 0.41 568 740 15 AMB 0.40 0.43 3

A-D/6/ Gate 0.12 0.46 896 1800 15 AAE3 0.43 0.52 3

A-D/6/G ate n/a n/a n/a 1200 15 450*

0.41 0.41 3

A-D/6/ Gate n/a n/a n/a 1800 50 ANE 0.54 0.55 3

A D/6/Gato n/a n/a n/a 1200 B/D 530*

n/a 0.46/0.4 Note A 3

A D/6/Gato n/a n/a n/a 1200 B/D 530*

n/a 0.44 Note B 7

B-W/3/ Gate 0.17 0.54 207 2500 15 AA43 0.52 0.56 7

B-W/3/ Gat e n/a n/a n/a 2500 50 AAE3 0.52 0.55 9

B-W/6/ Gate 0.21 0.68 158 1800 15 AA43 0.75 0.71 Note C 9

B W/6/Gato n/a n/a n/a 1200 B/D 530 n/a 0.42 13 Velan/2.5/ Gate 0.25 0.56 400 2500 15 AA43 0.53 0.49 13 Velan/2.5/ Gate n/a n/a n/a 2500 50 AA43 0.52 0.48 13 Velsn/2.5/ Gate n/a n/a n/a 2500 B/D 530 n/a 0.38 14 Crane /6/ Gate 0.16 0.42 450 1800 15 AA43 0.37 0.4 14 Crane /6/ Gate n/a n/a n/a 1800 50 AAE3 0.44 0.41 14 Crane /6/ Gate n/a n/a n/a 1200 B/D 530 n/a 0.8 Note D 16 A-D/3/G ate 0.10 0.47 660 1800 15 AA43 0.45 0.42 21 Rock /Ed/2-1/2/ Gate

.131.28

.321.56 150 463 15 AAE3 0.28 1.93 24 Velan/6/ Gate 0.40 0.44 360 1800 15 AAE3 0.52 0.55 24 Velan/6/ Gate n/a n/a n/a 1800 15 AA43 0.55 0.54 Note E 24 Volan/6/ Gate n/a n/a n/a 1200 15 450' O.36 0.35 24 Velan/6/Gato n/a n/a n/a 1800 50 AA43 0.52 0.48 24 Velan/6/ Gate n/a n/a n/a 1800 15 AA43 0.55 0.52 Note F 24 Votan/6/ Gate n/a n/a n/a 1200 B/D 530*

n/a 0.46 30 Walworth/6/ Gate 0.11 0.44 750 1800 15 AA43 0.14 0.38

?O Watworth/6/Gato n/a n/a n/a 1200 B/D 530 n/a 0.53/0.4 Note G 34 West /3/ Gate 0.27 0.46 269 2500/750*

15 AAE3 0.30 0.32

Open/Close 41 A-D/6/PD Gate 0.13 0.63 109 1800 15 AAE3 0.46 0.46 41 A-D/6/PD Gate n/a n/a n/a 1200 B/D 530 n/a 0.36/0.52 COA &ENTS Note A Some body and disc seat damage, flow limited by loop piping Note '3 Body and disc seat damage minimal Note C Wear on downstream side of body guides Note D Damage to guide rails' Note E Stem horizontal I

Note F Torque arm disconnected Note G Gouging damage to guide rarfs 481BL/WSK/jp,

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F A A A V V V V A d

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V CNNNN

PRELIMINARY RESULTS for Globe Valves Max AP V

Valve Valve No.

MFG / Size Psid Ft/Sec Temp Factor Comments 48 Edward /2 2500 15 M

1.16 48 Edward /2 2500 50 M

1.37 48 Edward /2 25a0 B/D 530 HW 1.87 Note A 49 Volan/2-1/2 2500 15 M

1.02 50 A-D/10 740 15 M

1.03 COMENTS Note A Valve did not close, valve f6ctor abnormally high 49 Tbl/WSK/;p.,

~. - _,

,--m_

.. m

+.

-......m m-m-

m

0 i

i i

i APPARENT DISC COEFFICIENT OF FRICTION VALVE #3, COLD WATER 0.7-0.65 9

0.0

=

H y 0.55-I 0.5

=

o o

os 0.45-J' JL z

o w

W 0.4 I

O E 0.35--

u.

m O

0.3 0

0.25-O.2.

2 4

6 8

1'O 1'2 14 STROKE # (even #:open, odd #:cdose) l i

e DP=800 A

DP=1200 o

DP=1800 PRFI N W

O l

i i

i 4

l 1

1 i

1 l

APPARENT DISC COEFFICIENT OF FRICTION VALVE #3,450 DEG WATER, BYPASS 0.7 0.05 i

2

{

9 0.6 i

9 0.55 i

e i

E 0.5-1 a

O s

0.45 2

m a

m A

^

i W

0.4 e

A O

l A

i E 0.35 u.

b o

0.3 o

0.25-0.2 2

4 6

8 10 1'2 14 STROKE # (even 3:open, odd #:cione)

I i

i a

a DP=600 A

DP=1200

TIIRUST @ TST VERSUS DP

(

VALVE 3 45000 t:

3 35000 N

300e8

,25000 a

E mt 2

5 15000 i

10000 5000 0

800 1000 I200 1400 gg g

DP, PSI 2

Afler 900 pre-coed strokes

Afler clean & re-hsbe

e

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=:

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=

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}

i y

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$8 W

Q P

N b'e o

i E

E l

g 5,,

3 a

.=

t eg m

E E

g W

4

(

M 6

A m

gg

........................... in gQ M

,3 g

WW M.

3

=

m w

B

i Valve #3, Ambient water, DP = 1800 psid, V = 15 fusec 5

5 QUICM LOOM DATA pg M

- 8 1-><

3 I

DIR1 LBS STDI D8RIST

...........................g.............:.............

j:

m.

.j.............j.............j.............j........

.j:............j:.............*:.............f........

jM.

8 s:

-1ENNE i

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-28888 -

- - i'*****************'*****!*************i.'*******

-M.

...!.............!.............*[.............

2.......

t, M.

...:.............:.............$..............h.......

-58888 8.............:............

4........

5 18 15 28 secs time E2861 DataSet 836 BuratIon 88:88:23:876 Recorded On 12/17/92 11:19:31

a. --.-.

m mm.-

t-M M

+s N

<-+._y

ie-

+ - -

e

w.m.--

.we.-.-,

1-w--

ev w-

1 l

Valve #3,450 F Hot water,15 ft/sec, DP = 1200 psid I

QUICM LOOM DATo i

3-3-e88-1814-11 D9t1 LBS STRI BGMT 8

1 e oc,o

% !/

_y 7-l 15MIRR 1............L............L............L..........

4 1

d 1EiARR lasooO

............L..........

t i

i i

i L1 = 0.A l I'

5 18 15 28 secs 1

time N1 DataSet 874 Duration 88:08:21:211 Decorded On 12/21/92 15:31:55 4

k

.-.w.

,.w v

n---

m

-w.a- - --- ------------ -

a I

E-i bs&amI I

cas

w.

9.

3 o.

g g

M

. u u

. 1 U

m h

................... em N

n

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a

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Q g

=

q, m

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g, to d

...f.......I......l... '......I.......t......l....4.......%...

g g

s e

g Q

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E 1,f,l**

g se d

Ill'!

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Valve #3,530*F Hot water Blowdown, DP = 1200 psid queat Ames mm Nits,1Z set las sum suust 5M I

g i

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...S............:...........

4............g...........

s i

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==-

ties EINES DataSet S H Buretten m m :26:63 M On N B:SEsE5 m

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p.

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3

..........j........*...........'...........

5 m

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W

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B

I Valve #24, Ambient water, V = 15 ft/sec, DP = 1800 psid THR1 STEM THRUST - TEST: 24-1-000-892-13

+ 0.0000E + 00

- - ~ - -

I.

g

=,

..a.+=

m.

e e o. =e

,a.-e

.,+.a.

e6

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-3.0000E + 04 a

,p f2 :-0.176

-4.0000E + 04 l

.s.0000E + 04 l

-6.0000E t 04 4

2 i

0 2

4 6

8 10 12 14 16 18 20 22 TIME (Sec) i PEMW

b Valve #24,450 F Hot water, V = 15 ft/sec, DP = 1200 psid THR1 STEM THRUST - TEST: 24-1-G00-964-11

+ 0.0000E + 00

-1.0000E + 04

\\

.-p=0 SS

-2.0000E + 04 3

-3.0000E + 04 a

4.0000E + 04 1

-5.0000E + 04 i

-6.0000E + 04 0

2 4

6 0

10 12 14 16 18 20 22 MI PREllMIRRY

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EPRl/NPD PRINCIPAL FINDINGS Butterfly valve torques bounded by vendor predictions Globe valves (with one exception) behaved in a predictable fashon if the effective area is considered l

With one exception, all valves fully closed or opened and sealed Number of strokes to achieve a plateau in apparent disc coefficient of friction during preconditioning varied from 100 to 900 l

Maximum apparent' disc

's during cold water pumped l

flow testing (after preconditioning) were generally 1

(

between 0.3 and 0.6, with the exception of one value at 0.75 and one value at 0.9 Operations & Maintenance Technology I

4 EPRl/NPD 4

PRINCIPAL FINDINGS

l Disc sliding tends to decrease with higher AP (higher seat bearing stress)

Hot water (450 F,15 FPS) testing after cold water preconditioning and testing, decreased apparent disc to the range of 0.34 to 0.41, with an average of 0.38 j

Hot water (530 F) blowdown apparent disc g's ranged l

between 0.35 and 0.80 l

l Steam blowdown disc

's ranged between 0.25 to l

0.64 No measurable effect on apparent disc (gate valves) due to upstream elbow orientation or stem orientation l

Operations & Maintenance Technology

,..%.--,.m,2.-,

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.=vwe-,---+e-r,+-+-'<--r-+-*-

---"--e--*'- ' - " - ' ' * " ' ' ' - '

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EPRl/NPD BUTTERFLY VALVE FLOW LOOP TESTING (Kalsi Engineering) i i

i i

i 4

I Engineering & Operations uvmo,,

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EPRl/NPD APPROACH Perform industry survey to identify disk shapes and aspect ratios to be tested Design and fabricate test specimens Perform matrix of 37 tests on disk shapes and upstream configurations 1

i

[

Engineering & operations

mam,

d EPRI Butterfly Valve Testing

~O RP3433 PR SuAT4C Ca*80 PR:sMA71C

+

L 1

J g

/

o # sC sMAPC i e - m e suar C sACur ACC OssC sMAPC 1A - M a suA f t C sACKF ACC 4-9 7PRisuaTec 1

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pesc sMAPC s - snadCTCaic oisc ossC se s - svwCTER#C (LCwn sMAPC) i j

I Disk Shape Variations 1

Kals! Engineering,Inc.;

4 i

e

,g,+-

EPRI Butterfiy Valve Testing

~

RP3433 31 Aspect Number of Disk Shape Ratio Geometries Nonsymmetric, prismatic back face 0.15, 0.25, 0.35 3

Symmetric 0.15, 0.25 2

Nonsymmetric, conical back face 0.17 1

(scaled model of 42" Posi-Seal)

Total number of disk geometries to be tested 6

Matrix of Disk Geometries to Be Tested Kalsi Engineering, Inc.

1

f EPHI ButterGy Valve Testing RP3433-31 Test Disk Shape and Aspect Elbow Elbow Flow Range Group Orientation Ratio Config Proximity 0.15 3 velocities belowchoking; 1

Symmetric N/A

> 20D 2 velocities above choking 0.25 when achievable

_ _,m 0*15

~

a Nonsymmetric:

2 0.25 N/A

>20D shaA upstmun 0.35 Nonsymmetric:

0.15 a

3 shandoh 0.25 N/A'

> 20D 0.35 4Tscale model 4

g, 0.17 N/A

> 20D 4Yscale model 5

gg 0.17 N/A

> 20D Disk Shape Variations and Scale Model Verification Test Matrix Kalsi Engineering, Inc.

e F

l' Documint No.1798C, Rev. 0 l1 June 10,1993 Page 15 l

CA561 Velocity Skew i

Flow Stem Axis Out of Elbow Pione s

k s

e

)

(

=

\\

~

s

~

m 1(A) Symmetric 1(B) Non-eymmetrlC 1(C) Non=eyametr$C Shaft upstreon Sheft Downstreon Configuration 1 (Velocity Skew Assists Closing Action)

\\

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=

l

=-

e

)

=

J A

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2(A) Symmetric 2(B) Non-symmetrlC 2(C) Non-symmetric Shaft Upstroom Shaft Downstroom I

Configuroflon 2 (Velocity Skew Opposes Closing Action)

Velocity Skew 7

Flow Stem Axis in Elbow Plane U

y I

h, Configuration 3 (Velocity Skew Symmetric About Stem Axis)

Figure 2 Upstream Elbow Configurations for Symmetric and Non-synunetric Valves i

K ALSI ENGINEERING, INC.

MECHANCAL DESGN G ANALYSIS

=

4 EPRI Butterfly Valve Testing-t' RP3433 31 i

t t

Test DiskShapeand Aspect j

Group Orientation Ratio ElbowConfig

" "E' Pmx 6

Symmetric 0.25 Configuration 1 0D 3 velocitiesbelow

{

3D choldng;2 velocities 7D above eWagwhen i

achievable 7

Symmetric 0.25 Configuration 2 OD 3D 7D 8

Symmetric 0.25 Configuration 3 0D j

3D j

7D i

9 Nonsymmetric 0.25 Configuration 1 OD shaft upstream 3D l

7D

)

10 Nonsymmetric 0.25 Configuration 2 OD shaft upstream 3D 7D l

i 11 Nonsymmetric 0.25 Configuration 3 0D 5

shaft upstream 3D l

7D i

j 12 Nonsymmetric 0.25 Configuration 1 0D i

shaft downstream 3D j

7D i

13 Nonsymmetric 0.25 Configuration 2 OD shaft downstream 3D 7D 14 Nonsymmetric 0.25 Configuration 3 0D

!l shaft downstream 3D 7D 4

J l

Upstream Elbow Test Matrix Kalsi Engineering,Inc.

EPRI Butterfly Valve Testing RP3433-31 CAS38 0'='-

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KALSI ENGINEERING, INC.

MECHANICAL DESIGN & ANALYSIS

.o I 7; 8 >

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70. o 80.o 90.0 Di* An*.deo EPRI Butterfly Valve Testing at Kalsi Engineering, Inc.

DocumeniNo.180GC Project No. 42.18 l

TestNo. ([185247 Page 10 or ir

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l DocumeniNo.1806C Pmject No.42.18 i

TestNo. q$285 2p7 Page 6 of 12-

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^3 4A KALSI ENGINEERING, INC.

MECHANICAL DESIGN & ANALYSIS

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BUTTERFLY VALVE FLOW LOOP TESTING STATUS 31 of 37 configurations tested Remaining tests:

.15 and.35 non-symmetric discs Posiseal scale model Testing complete 8/10/93 Report 8/93 Engineering & Operations nv.,aw,,

ML20059G809

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