ML18094A409

Simulated 40-Yr Svc Life Test for PSA-3 Shock Arrestor W/2 to 3% Friction

ML18094A409
Person / Time
Site:	Salem
Issue date:	04/13/1984
From:	Tomsen E, Whitney R, Wright W PACIFIC SCIENTIFIC
To:
Shared Package
ML18094A408	List: ML18094A407 ML18094A409 ML18094A410
References
TR-871, NUDOCS 8905120017
Download: ML18094A409 (12)

Text

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TEST REPORT 871 REPORT NO.

TR 871 DA TE 13 April 1984 A SIMULATED 40 YEAR SERVICE LIFE TEST FOR A PSA-3 SHOCK ARRESTOR WITH 2 TO 3% FRICTION FROM

!i!ac:IFIC:

SC:I E nTI Fl C:

KIN-TECH DIVISION PREPARED BY APPROVED BY Eb~~~

W~-4.+/-!$S.w~A Williams. Wright, Jr.,.__~.

Test Engineer Director of Engineering t/z: ;,~/,(> 71 _/~I I '6-----

Edward R. Thomsen Mgr. Quality Systems *& Services

390512001 7. 89(>505 PDR ADOCK 05000272 p

PDC I

REV.

DATE BY APPD. BY PAGES AFFECTED Rel 4/13/84 Jetl.I WSti\\)

PACIFIC SCIENTIFIC

• KIN-TECH DIVISION 1346 S. State College Blvd. Anaheim, Ca.

92803 (714) 774-5217

. /

' /1->

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REPORT NO.

TR 871 PAGE 2

OF 12 ADMINISTRTIVE DATA PURPOSE OF.TEST To determine the long term effects of a 40 year life cycle test of a

PSA-3, P/N 1801106-05 shock arrestor with high (2 -

3% of rated load) friction.

A typical year of life for a unit consists of 1,000 cycles at 80% stroke and a 2 mm/sec average velocity.

The unit was subjected to an acceptance test, measuring the acceleration at rated load, lost

motion, and drag f~rce.

The above sequence of tests were repeated periodically during the test.

MANUFACTURER PACIFIC SCIENTIFIC COMPANY, KIN-TECH DIVISION 1346 S. State College Boulevard Anaheim, CA 92803 MANUFACTURER'S TYPE OR MODEL No.

P/N 1801106-05 MODEL PSA-3 S/N 20956 APPLICABLE DOCUMENTS PSCo Drawing 1801106-05 PSCo Acceptance Test Procedure I.T. 524, Rev. T PACIFIC.SCIENTIFIC

• KIN-TECH DCVISION 1346 S. State College Blvd. Anaheim, Ca.

92803

( 714) 77 4-5217

REPORT NO.

TR 871

~

PAGE __

3 __ OF 12 ADMINISTRATIVE DATA Continued QUANTITY OF ITEMS TESTED One (1) P/N 1801106-05 Shock Arrestor, S/N 20956 was used for the test program.

The unit was selected at random from a production lot.

The test unit was built in accordance with ASME Boiler and Pressure Vessel Code Section III, Subsection NF, 1974 Edition, S74 Addend~ through 1980 Edition, S82 Addenda, Code Cases 1644-4 through 1644-8 and N249-l and -2.

The test unit was subjected to all of the required tests.

TEST COMPLETION DATE March 29, 1984 TEST CONDUCTED BY PACIFIC SCIENTIFIC COMPANY Kin-Tech Division Anaheim, CA 92803 SECURITY CLASSIFICA1ION OF ITEMS Unclassified PACIFIC SCIENTIFIC

• KIN-TECH DIVISION 1346 S. State College Blvd. Anaheim, Ca.

92803 (714) 774-5217

TABLE OF CONTENTS ADMINISTRATIVE DATA EQUIPMENT LIST CERTIFICATION TESTING 1.0 1.1.

1.2 1.2.1 1.2.2 1.2.3 1.3 2.0 2.1 2.2 2.2.1 2.3 FIGURES Acceptance Tests Requirements Procedure Acceleration Test Lost Motion Test Drag Force Test Results Life Cycle Tests Requirements Procedure Stroke Cycling Tests Results 1

2 3

Acceleration versus Life Cycle Lost Motion versus Life Cycle Friction versus Life Cycle REPORT NO.

TR 871 PAGE __ 4__ OF 1 2 PAGE 2

5 6

7 7

7 7

7 8

8 10 11 12 PACIFIC SCIENTIFIC

• KIN-TECH D!VISION 1346 S. State College Blvd. Anaheim, Ca. 92803 (714) 774-5217

EQUIPMENT LIST TEST EQUIPMENT ACCURACY CALIBRATION CALIBRATION DATE PERIOD Dimensional Standard Micrometers (Data on file in Quality Control Dept)

Examination Height Gages, etc.

Dynamic Load Mts. Load Cycling Machine Model 311,31, S/N 416

+/-. 05%

7/21/83 12 Months Lebow Load Cell Model 661.023A-02, S/N 999 Dynamic Load C.L. Collins Corp. Linear

+/-1%

Daily Motion Transducer Model LMT 12'911, S/N 19479 Velocity Celesco* Transducer Prods.

+/-.25%

3/01/84 4 Months Transducer DV-301-20A F '

P/N D301020-00, S/N A01797 X-Y Recorder Hewlett Packard

+/-.2% of 3/22/84 4 Months 7044B, S/N 2047A00133 full scale

u m

G>.,,

m 0

0 1~

-4 z p 1-3 0

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00

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REPORT NO.

TR 8 71

---.....;_.;...._-~

PAGE 6

CERTIFICATION I, the undersigned, being a registered Professional Engineer in the State of California, competent in the testing and evaluation of Mechanical Shock Arrestors, certify that this report truly and accurately presents results of tests performed in accordance with the approved test procedures.

OF 12 Certified by ~

f(~

Quality Engineer State of California Registration No. 1919 Date

£-12.- P1-PACIFIC SCIENTIFIC** KIN-TECH DIVISiON 1346. S. State College Blvd. Anaheim. Ca.

92803 (714) 774-5217

• .. /

,./.*.*.

REPORT NO.

TR 871

--=-=-._..;:;,..:....:.. __

PAGE __

7 __ OF __

1_2 __

1.0 ACCEPTANCE TESTS 1.1 Requirements 1.2 1.2.1

1. 2. 2 The test unit was examined and tested to the acceptance requirements of I.T.

524.

The snubber must limit the acceleration to.02 g maximum.

The drag force of the snubber shall not exceed 60 Lbs (1% of rated load) in both direction of travel.

The unit's lost motion allowable shall be.040 in maximum.

Procedure Acceleration test A constant load of 6,000 Lbs was applied to the Shock Arrestor while measuring the unit's velocity.

The unit's velocity is plotted against time.

The constant slope portion of the

~v recording, ~ T is the acceleration of the shock arrestor.

The test was repeated for both tension and-compression load.

Lost Motion Test Since the unit's inertia mass cannot be fixed on the MTS machine, an alternate dynamic lost motion test was used.

The unit is vibrated at low load at 3 Hz.

The load is gradually increased to 6,000 Lbs value and an oscilloscope recording is made of the unit's displacement versus the load.

The verfical straight portion of the recording is the lost motion.

PACIFIC SCIENTIFIC

• KIN-TECH DIVISION 1346 S. State College Blvd. Anaheim, Ca. 92803 (714) 774-5217

/

J

1. 2. 3 REPORT NO*--T~R...._.8~7~11..._ __

PAGE __ a __ OF 12 ACCEPTANCE TESTS Continued Drag Force Test The unit's drag force was measured both in extension and retraction.

A continuous load recording was made for about 80%

of the unit travel approximately at 1/2 inch away from the fully extended and fully retracted positions.

The velocity was controlled at 2 mm/sec.

1.3 Results The unit's acceleration and lost motion were below the maximum allowable limits.

The friction or drag force was at 150 Lbs (2.5~ of rated load) at the start of the life test.

2.0 LIFE CYCLE TESTS 2.1 Requirements 2.1.1 The unit was stroke. cycled for 5,000 cycles at 2 mm/sec. to simulate thermal piping movement in a power plant.

PACIF~C SCIENTIFIC

• KIN-TECH DIVISION 1346 S. State College Blvd. Anaheim, Ca.

92803 (714) 774-5217

,./

2.2 2.2.1 REPORT NO.

TR 8 71 PAGE __

9 __ OF 12 LIFE CYCLE TESTS Continued Proc*eaure Stroke Cycling Tests The unit was placed in a

hydraulic. exiension/retraction cycling machine.

The stroke limits were adjusted for an 80%

stroke.

mm/sec.

strokes.

cycles.

The average stroking speed was adjusted to 2.0 An event counter was used to count the number of

~he cycling was continued for a total of 40,000 At approximately every 5,000 cycles the test was interrupted to conduct functional tests.

2.3 Results The lost motion and acceleration changed very little during the life test.*

The acceleration was measured at the start of the U,_fe te~t.

• and again at 30,000 cycles and at the end of the 40,000 cycles test.

The friction was 150 Lbs at the start of the life test and became less as the test progressed.

After 40,000 cycles the friction was 83 Lbs.

(Refer to Figures 1, 2 and 3~)

PACIFlC SCIENTIFIC

• KIN-TECH DIVISION 1346 S. State College Blvd. Anaheim, Ca. 92803 (714) 774*5217

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