ML20049J553

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Seismic Test SMB-000-2/H1BC & SMB-000-5/H3BC Test Rept B0084
ML20049J553
Person / Time
Site: Grand Gulf 
Issue date: 11/12/1980
From:
LIMITORQUE CORP.
To:
Shared Package
ML20049J546 List:
References
PROC-801112, NUDOCS 8203180350
Download: ML20049J553 (10)
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  • 28 No. nc I.IMmRQUE CORPORATION RESEARCH AND DEympgggf IABORA'ICRY CEARLEs H. Cox

.J ASSISTANT CHIEF TEST ENGINEER N'

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SUBJECTS Righ frequency seismic testing of Limitorque SMB

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ElBC and I.initorque SMB-000-5/H3sc (A) Seisale testing procedure for I.imitorque SMB CE:

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2/H1BC and I.initorque SMB-000-5/H3BC w

Besearch and Development Project 354689 l

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(B) Acton Environmental Terting Corporation Test Report 015780 UNIT A UNIT DESCRIPTION MOTOR IDENIITICATION Type:

SMB Starts 21b-ft Size 000 Run

.401t-ft Order No.

3E4689 Frame M48 Serial No.

RPM 1700 Volts 460 V A.C.

Manual Unit Identification Amb. C 60 Duty 15 min.

Type:

H H.P.

.125 Size:

1 BC Type P

Order No.

3E4689 Phase 3

Serial No.

Hz 60 Amps

.45 Ins. Class RH UNIT B i

UNIT DESCRIPTION MC"VR IDENTIFICATION Type:

SMB Start:

515-ft Size:

000 Run lib-ft Order No.

3E4689 Trame R40 Serial No.

RPM 1700 Voltg 460V A.C.

Manual Unit Identification Amb. C 40 Duty 15 min.

Type:

H H.P.

.33 Size:

3 BC Type P

Order No.

3I4689 Phase 3

- Serial No.

Hz 60 Amps

.75 Ins. Class RH

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a 8 MtA f. L[) Prior to seismic exposure, the SMB-000/51BC was equipped with a 21b-ft WP actor and four train - four gear limit switch. The torque ,tch was pre-set such that ElBC manual unit delivered 900lb-ft ou orque. ~ [ '* . emit oossination was mounted to a special seismic plate provisions ) or'a stem with a torque arm and seat which slat. lated loading the valve .ectuator during valve closing (ref. Sesinic Fixture drawing, F g. 2). The [. .-gt delivered 900lb-ft output. L. S e limit and torque switch were wired into a control unit which contained f a pushbutton control station, reversing starter, and indicator lights for l, open, close, and mid-stroke positions (ref. Seismic Test Wiring Diagram. Fig. 3)..The limit switch was set for a fifteen second stroke in each dir-eCtion. A set of contacts (furthest from the intermittent gearing of the limit switch) were connected to a chatter circuit calibrated for two (2) mil- [ 11 seconds switch chatter. The unit combination was' then subjected"to L. seismic testing per referenced test procedure, A special high frequency s&ismic bracket was installed on the SMB/HBC r. combination. t PROCEDURE: Unit B c Prior to seismic exposure, the SMB-000/H3BC was equipped with a 51b-ft WP motor and four train - four gear limit switch. The torque switch was pre-set such that the H3BC manual unit delivered 19951b-ft output torquc. The unit combination was mounted to a special seismic plate with pro-visions for a stem with a torque arm and seat which simulated loading of the valve actuator during valve closing (ref. Seismic Fixture dia-gram, Fig. 2). The unit delivered 19551b-ft output. ~ I The limit and torque switch were wired into a control unit which contained L a pushbutton control station, reversing starter, and indicator. lights for open, close, and mid-stroke positions (ref. Seismic Test wiring Diagra.m. I Fig. 3). The limit switch was set for fift'een (15) second stroke in esca direction. [ A set of contacts (furthest from the intermittent gearing of the limit F switch) were connected to a chatter circuit calibrated for two (2) all-liseconds switch chatter. A special high frequency seismic bracket was installed on the SMB/HBC combination. The unit was then subjected to seismic testing Per ref-erenced test procedure. m A' ( [

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SEOt7ENCE OF TESTING ,U The following table lists the type test, in chronological ode performed for both Dmit A and Unit 3. ..y;,,. us- ,, =.

  • Axis of Frequency Test Invel Excitation Mode of TEST S Excitation (Ez)

(G) Rate Operation Non-operating \\ l By&V 1-50-1 .75 2 oct/ min 'I l 5 1A HjsV 50-100-50 .75 2 oct/ min Non-operating 2 Hy&V 1,50-1 .75 2 oct/ min Non-operating f au 2A My&V 50-100-50 .75 2 oct/ min Non-operating )l EM .c I a 3 s sV 1-100 TRS to 30 sec/ level Operating a' y envelope

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g}4 By&V 1-100 5> u aEo 5 H sV 1-100 y u 6 Hy&V 1-100 EbE 5

  • For the pu: pose of iqentification:

H direction is horizontal parallel to the motor axis g H direction is horizontal perpendicular to the motor axis 2 V direction is vertical twt I ~' A* .(/ T .v I L { r0 . it-* \\ / I l o' H. 2 t i

g. EVALtmTION OF is.4 mG i g'. Se I.initorque actuator (s) and seismic table were monitored using twelve (12) accelerometers in conjunction with record-ing visicorders. An oscilloscope was used to aid in deter-O g true resonant frequencies. Data for the multifrequen ta was recorded onto magnetic tape. ?En s 1 -MONANCE SEARCH 1 he following tables s===arise the results of resonance surveys of the units tested with respect to axis of vibration and unit configuration. The numbers and letters found in parenthesis in the column headed " Test 0" represent the test number as found in Acton Report 415780 for each respective unit. ? e* e e ]. l e e e e s O b .{ 5i f r-..-.

v RESONANCE SURVEY r. UNIT A (SMB-000-2/H1BC) s s.. (p.,, - Test I Axis Frequency of Point of Servey j' Resonance Indication Range lA (14 Part II) H sv M Hz M or M-MM Na g 76 Hz Morizontal on motor s SMB 2A (15 Part II) H sV 77 Hz Undefined 50-100-50 Na y 89 Itz = = 96 Itz

  • 1A (Test 16)

It sv 83 itz Undefined 50-100-50 Ms 2 a 93 Hz 102 Hz

  • 2A (Test 17)

H sv 77 Hz Undefined 50-100-50 N: g 71 Itz

  • NOTE: Tests IA and 2A were reperformed using an additional seismic support bracket 18lt;.

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m. .L. .v e w c = r t> .w s t .) = RESONANCE SilRVEY r.. UNIT B (SMR-000-5/It3BC) 6 Frequency of Point of Survey Test 5 Axis Resonance Indication Range lh (8 Part II) Il &V 78 Hz Motor 50-100-50 Ms j 2A (9 Part II) II EV 94 llz Undefined 50-100-50 Ms 112 ffz T TAHl.M 2 e

5 j .IxxIxz. Moz.rIrREooEwer Seismic tests numbered 3 through 6 in Sequency of Testing exposed the I,imitorque SMB-000-2/ElBC and the Limitorque SMB-000-5/H3 ,to 3 multiple frequancy vibrations. he$ taput consisted of biaxial, periodic pseudorandom vibrati of thirty (30) seconds duration. A special diis:: tic , support bracket was used on each SMB/HBC coctbination during all tests. -s Test loads were designed so that the Test Response Spectrum (TRS) a from the control accelerometer (computed at A = 10 - 5% damping) would envelope the osE Required Response Spectrum (RRS) as refer-onced in Acton Deport 915780, Figure 1. e The units were operated from the torque seated closed position to the open position and back to the torque seated closed position during o each test interval of thirty (30) seconds. Each unit functioned properly during all multiple frequency testing. CONCLUSIONS: = Based on results presented in Acton Report $15780, the Limitorque SMB-000-2/ElBC and the Listitorque SMB-000-5/H3BC successfully passed all specified testing. During the resonance survey, contact chatter on the designated limit switch contacts occured at a frequency of 77 Hz on the SMB-000-2/ H130 in the H & V axis in the survey range of 50-100-50 Hz. It was 2 determined that weak contact finger springs lead to the presence of contact chatter on this individual unit. Both units performed all functions with no malfunctions or phys cal damagure during or after any sequence of testing. Respectfully submitted, Charles H. Cox Assist. Chief Test Engineer 1 /eab 1 W.J[Denkewski cc: y I.E. Wilkinson W.L. Sykes l J.B. Drab l c D.S. Warsing D.A. DiPasquale 't

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