ML20050C881
| ML20050C881 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 02/15/1980 |
| From: | NAMCO |
| To: | |
| Shared Package | |
| ML20050C841 | List:
|
| References | |
| RTR-NUREG-0588, RTR-NUREG-588 IEB-79-01B, IEB-79-1B, TR-3613-PP, TR-3613-PP-R, TR-3613-PP-R0, NUDOCS 8204090430 | |
| Download: ML20050C881 (46) | |
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NAMCO CONTr-TOL S iro rasr ,2,..
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ncety To 249 cucuuntn sTatr.T n:rrenson, osio 4ao47 trasi s764o7, REPORT NO. QTR 105 DATE AUG. 28, 19,80 REVISION 1.
COPY NO. t 2; QUALIFICAT10fl 0F EA180 SERIES LIMIT SWITCHES FOR USE IN llVCLEAR POWER PLANTS Ils COMPLI ANCE WITH IEEE STAllDARDS 323-1974, 382-1972 AND 344-1975.
(a; THIS REPORT IS Af4 EXTENSidN OF EA180 QUALIFI-CATION REPORTS DATED SEPTEMBER 5,-1978 AND MARCH 3, 1978.
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-QTR 105 ,
April 3, 1980 :
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, pages: 0-3, 3-2, 3-7, 1
s 4-1, 4-4, 4-5, 4-6, 5-1, 5-2, 5-3, 5-4, 6-1, 7-6, j - 9-1, 9-3, Add Section 11,0 l
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QTR 105 AUGUST 28, 1980 INDEX
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PAGE 1,0-
' ' PURPOSE OF QUALIFICATION TEST 1-1 c
REPORT 2,0 ' APPLICABLE SPECIFICATIONS AND
', 2-1 1 s- DRAWINGS 3T01 GENERIC GROUP IDENTIFICATION, L 3-1 i
~' SPECIFICATIONS AND SELECTION
-, f- FdR TEST 4, d] ' SERVICE CONDITIONS, INSTALLATION 4-1 1 -
REQUIREMENTS, MAI NTENANCE AND QUALIFIED LIFE 5,. 0 -
TEST $EQUENCE AND RATIONAL FOR 5-1 y TEST CONDITIONS
, 6.0 INSPECTION AFTER TEST 6-1 7 ~. 0 COMMENTS'
SUMMARY
AND CONCLUSIONS L
7-1 8.0 DESCRIPTION OF PRODUCT IMPROVEMENT 8-1 1
. . .V(N CHANGES
- i. 9.0 ATTACHMENTS . 9-1 i
10.0 s - TEST REPORTS 10-1 1 P. 0 -
TEST PLAN 1
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- NAMCO OONTROt S
.. -QTR.105 April 2t 1980
() FIGURES FIGURES PAGE 1 List of Limit Switches 3-2 Analyzed for, Generic Group (Standard 10 Operation) 2 List of Limit Switches 3-7 Analyzed for Geperic Group (Short Travel 8 Operation) 3 List of Limi t Swi tches
- Analyzed for Generic Group (Standard Maintained Operation) 4 List of Limi t Swi tches
- Analyzed for Generic Group (Short Travel Maintained Operation) 5 Installation Instructions 4-2 EA189 90006 6 Maintenance Instructions 4-3 EA189 90051 i) '
7 List of Non-Metallic Materials 4-11 Used in the Qualified Limi t Swi tch 8 Arrhenius Curve-for Estimated 4-12 Qualified Life .
9 Resonance Search Plot 7-3 10 Sine Dwell Plot 7-4 11 Identi fication of Production 3-10 Switches
- Not available, tests in process.
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NAMCO CONTRot S
. QTR 105 ' April 3, 1980 CERTIFICATION THIS QUALIFICATION TEST REPORT IS A TRUE AND ACCURATE PRESENTATION BASED UPON THE ENGINEERING DATA AND TEST REPORTS AVAIL- !
ABLE AT THE TIME.
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jfggg John R. Bendokaitis 7 /
Proj ect Engineer Nuclear Swi tch Coordinator i
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L IVAMCO CorVTACM S QTR 105 April 3, 1980 l.0 PURPOSES OF QUALIFICATION TEST REPORT:
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1.1 This Quali fication Test Report (QTR) will extend the original qualification of the EA180 series limit switch to include several product improve-ment changes. See Section 9.0 for description of these changes.
1.2 The original EA180 Qualification Reports are dated September 5, 1978 and March 3, 1978.
1.3 This QTR is for a series of type tests in support of EA180 series generic group qualification to IEEE Std. 323-1974, 344-1975 and 382-1972. These standards pertain to Class IE safety-related equip-ment for use in nuclear power plants.
([f l.4 This QTR sumnarizes the test reports provided try Acme-Cleveland Development Company and compare them to the requirements of the original test plan.
1.5 This QTR will provide the addi tional data required
, by IEEE Std. 323-1974, Section 6.2 Equipment Per-formance Speci fications, such as; Performance Char-acteristics, Ratings, I nstall ation Requi rements, Preventative Maintenance, Design Li fe, Auxiliary Devices Requi red, Rated Service Conditions, Periodic Quality Control Tests and Estimated Quali fied Life.
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NAMCO OONTROLS QTR 105 April 3, 1980 1.0 PURPOSES OF QUALIFICATION TEST REPORT: (CONT'D.)
1.6 The tests verify the limi t swi tch performance and include: Aging Simulation, Wear Aging, Radiation Exposure, Seismic Qualification and Design Basis Event Environmental Conditions.
1.7 The tests envelope the environmental conditions set forth in Section 4.0.
1.8 Justification for test requirements and/or condi-tions will be provided where necessary, 1.9 Note: It is the user's responsibility to determine the acceptability of the tests methods, procedures and speci fications for a specific application.
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NAMCO OONTMS
., QTR 105 April 3, 1980 2.0
{) APPLICABLE SPECIFICATIONS AND DRAWINGS:
2.1 The listed IEEE standards were used as guidelines in the preparation and performance of this quali-e fication program.
2.2 IEEE Std. 323-1974 - Std. for Qualifying Class IE Equipment for Nuclear Power Generating Stations.
2.3 IEEE Std. 382-1972/ ANSI N41.6
- I EEE Trial-Use Guide For Type Test of Class I E Electric Valve Operators for Nuclear Power Generating Stations.
2.4 IEEE Std. 344-1975 - Recommended Practice for
()
Seismic Qualification of Class IE Equipm.ent for Nuclear Power Generating Stations.
2.5 Namco Controls Test Plan
, No. LP10767-3 Test Plan for Qualification of Series EA180 and EA740 Limit Switches.
2.6 Namco Controls Drawings 2.6.1 EA180-11302 Limit Switch Assembly 2.6.2 EA180-14302 Limit Switch Assembly r']) 2-1
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'QTR 105 April 3, 1980
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3.0 GENERIC GROUP IDENTIFICATION, SPECIFICATIONS AND SELEC-TION FOR TEST 3.1 . Generic Group Quali fication provided by type test T.R.-3613-PP (Section 10.1). The generic group
. of EA180 limi t swi tches quali fied by T R. 3613-PP is described as the " standard" series limit' switch with a ten. (10) degree trip travel, three (3) mounting types and.two (2) modes of' operation.
3.1.1 .The selection of the EA180 limit switch to be used for test was based upon. an Engineer-ing analysis of the six (6) ' limit switch part numbers listed in Figure 1.
The analysis was based upon computation of the allowable tensile and shear areas and 0 -
strength of the fasteners for the various methods of mounting and attachment of the back cover. .
It was concluded that the EA180-11302, stan-dard mounting, represented the most conser-vative (most severe) conditions for test.
3.1.2 The di rection of rotation to operate the switch does not affect the test program be-cause the swi tch mechani sm i s .symmet rical .
The test sequence also provides for testing in the operated and unoperated condition.
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.QTR 105. AUGUST 28, 1980 3.0 GENERIC GROUP IDENTIFICATION,. SPECIFICATIONS AND SELEC-T10N FOR ~ TEST (CONT'D. )
List of Limit Switches
, in Standard Operating (10')
Generic Group MOUNTING PART NUMBER TYPE DESCRIPTION e EA180-ll302 STD Two threaded holes on either CW EAl80-12302 i STD side of housin9 CCW EA180-21302 Style 1 Four holcs through wide CW EA180-22302 Style-l bottom cover CCW EA180-31302 Style 2. Four holes through long CW EA180-32302 Style 2 bottom cover CCW L
( )*Di rection of rotation of lever shaf t to operate switch.
View-facing lever shaft, 4
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NAMCO OONTRot S QTR 105 April 3, 1980 3.0 0 GENERIC GROUP IDENTIFICATION, SPECIFICATIONS AND SELEC-TION FOR TEST (CONT'D.)
3.1.3 With exception of the back cover all'other components of the listed limit switch part numbers are common.
3.2 Selection and identification of the limit switch for test per T.R. 3613-PP.
3.2.1 The EA180-ll302 limit switch used in this test was one chosen at random f rom several assembled on the Nanco Controls production line by Production personnel. All parts were per bill of materials EZ10683-90 and subjected to standard inspection procedures.
3.2.2 Identification 1
O The test switch was marked with the follow-ing:
Part Number EA180-ll302 Engineering Number EZ10683-90 Date of Manufacture 3979 Factory Order Number 13658 Test Number 138-90 3.2.3 Throughout test report T.R. 3613-PP this switch is referred to as No. 138-90.
3.3 Speci fications for qualified limit switch generic group, per T.R. 3613-PP, I EEE 323-74, 6.2(2).
The speci fications for the EA180-ll302 group limit
() switch are as follows 3-3
NAMCO CONTACM_s QTR 105 April 3, 1980
/~ 3.0 GENERIC GROUP lDENTIFICATION, SPECIFICATIONS AND SELEC--
k TION FOR TEST (CONT'D.)
3.3.1 The switch is a heavy duty, double pole, double throw, butt contact, quick break and quick make type.
3.3.2 Nameplate rating:
125VAC -
20A 250VAC -
15A 480VAC -
10A 600VAC -
SA Power Factor of Load 75-100%
125VDC -
5A 250VDC - 1.5A 3.3.3 Operating data O. Pretravel 10 Differential Travel -
8*
Recommended Travel -
13' Maximum Torque during Pretravel - 21 in. Lbs.
Note: When operated the limit swi tch lever shaft is spring loaded and will return to the original posi tion i f released.
3.3.4 Enclosure type The swi tch enclosure meets the requi rements of NEMA 1, 4 & 13.
3.3.5 See assembly drawing EA180-11302 for other detailed infonnation such as size and shape.
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NAMCO CCwVTROt S QTR 105 .; April 21, 1980 l
i .
3.0 GENERIC GROUP IDENTIFICATION, SPECIFICATIONS AND SELECTION FOR TEST (CONT'D.)
3.3.6 Production released-bill of materials for i
E switch part numbers quali fled to this report are identi fled with QTR 105. First release was Revision H.
3.3.7 Production manufactured switches are iden-ti fied wi th the following as shown in Figure 11:
Part Number ,
- Ratings.
~
B/M Revision Factory' Order Code Date Code l
i I
- O 3.s.
1
, _ . . , . . . ~ _ . . , , . . - , . - . . ~ . .
NAMCO CONTRCX.S QTR 105 April 3, 1980 t
, '3.0 -GENERIC GROUP IDENTIFICATION, SPECIFICATIONS AND T[) SELECTION FOR TEST (CONT'O.)
3.4 Generic group .quali fication of "short travel"-
t series limit switches.
3.4.1 The generic group of EA18014302 short travel limit switches listed in Figure 2 is qualified by similarity to switches tested in T.R. 3613-PP (Section 10.1) and supplementary tests (Section 10.2).
3.4.2 Similari ty analysis. An Engineering com-paritive analysis of the short travel limit switch with the standard EA180 determined the only di fference .is in the latching
, mechanism.
3.4.3 .
A short travel switch #83 (EA180 14302)
, was subj ected to heat aging, wear tests, radiation exposure, seismic test and plant induced vibration simulation. (Section 10.2) 3.4.4
.i
Conclusion:
The EA180-14302 short travel series of limi t swi tches is quali fied by similarity to switches tested in T.R. 3613-PP 1
(Section 10.1). The mechanical di fferences in the latching mechanism did not affect quali fication as illustrated by supplementary test reported in Section 10.2.
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NAMOO CONTRCM.S
, QTR 105 AUGUST 28, 1980 e
1
'3.0 GENERIC GROUP IDENTIFICATION, SPECIFICATIONS AND SELEC-T10N FOR TEST (CONT'D.)
List of Limit in Short Travel-(8, Switches
) Operating Generic Group PART NUMBER MOUNTING TYPE ROTATION DESCRIPTION ->
' EA180-ih302 STD Two threaded holes on-either CW EA180-15302 STD side of housing CCW i _EA180-24302 Style 1 Four holes through wide CW EA180-25302 Style 1 bottom cover CCW 1
EA180-3430' St le 2 Four holes through long CW EA180-35302 Style 2_ bottom cover CCW G
\ /*Di rection of rotation of lever shaf t to operate switch.
Vievi-facing lever shaft.
1 Figure 2 l
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. /VAMCO CorvTnCx_S
.QTR 105- April 21, 1980 3.0 GENERIC GROUP IDENTIFICATION, SPECIFICATIONS AND O
SELECTION FOR TEST (CONT'D.)
. '3.5 Speci fications for quali fied limi t switch generic--
short t ravel ' g roup, . l EEE 323-74, 6.2 (2).
The speci fications for the EA180.14302 group limit switch are as follows:
3.5.1 The switch is a heavy. duty, double pole, double throw,_ butt contact, quick break and quick make type, i 3.'5. 2 Nameplate rating:
- 125VAC - 20A 250VAC - 15A 480VAC - 10A 600VAC -
SA l ( 1-Power factor of load 75-100%
i '
125VAC -
5A I
t 250VAC - 1.5A 3.5.3 operating data:
Pretravel - 6' 30' i Di f fe rent i al travel - 4*
Recommended travel - 7' Maximum torque during pretravel - 38 in. Lbs.
Note: When operated the limit switch lever i
shaft is spring loaded and will re tu rn to the original position if released.
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. QTR 105 April 21, 1980 l i
3 .' O ' GENERIC' GROUP IDENTIFICATION, SPECIFICATIONS.AND
(_+)~ SELECTl0N FOR TEST (CollT'D. )
3.5.4 Enclosure type The switch enclosure meets the requi renents of IlEMA 1, 4.& 13. '
. 3.5.5 See assembly' drawing EA180 14302 for other detailed information such as size and shape.
3.5.6 Production released bill of materials for switches qualified to this report are iden-ti fied wi th QTR 105. Fi rst release was Rev i's i r,n H .
3.5.7 Production manufactured switches are iden-ti fied wi th- the following, as shown in Figure 11:
O- Part Number Ratings ,
Date Code-B/M Revision Factory Order Code O 3 .
O
NAMCO CONTIMOI.S
, QTR 105 April 21, 1980 fm 3,0 GEf1ERIC GROUP IDEllTIFICATI0ll, SPECIFICATI0tJS A!1D
() SELECTI0li FOR TEST (C0!1T ' D. )
Identi fication of Production Swi tches MFR Date Code System Prior To Sept., 1979
.-~
r cp ,N-Top Cover t y_ (Part fJo, f, Rating) m r 0179 A 93747 Conduit End of llousing c\ \\,
Date Code \
Month and Year
(~'7 Bill of Materials Revision Level Factory Order Code Present MFR Date Code System e g., g, '
1680 X 00999 e \ \ \ >
Date Code I Week and Year Bill of Materials Revision Level
(")
v Factory Order Code FIGURE 11 3-10 ,
NAMCO CO!VTWS QTR 105 AUGUST 28, 1980 i
(}~) ' 4.0 SERVICE CONDITIONS, INSTALLATION REQUIREMENTS, MAINTE-NANCE AND QUALIFIED LIFE (REF. IEEE 323-1974,-SECTION 6 2) 4.1 I nstall ation and connection requi rements.
See EA189 90006 (Figure 5) for special instructions.
4.2 Preventi ve' mai ntenance.
For preventive maintenance during installed life of the limit switch, see EA189 90051 (Figure 6). Re-placement-parts kit numbers are provided in these instructions.
4.3 Design life.
The mechanical design life is 500,000 cycles (Min.).
Electrical design life is 500,000- cycles (Min.).
The above design life ^ estimations are based upon e
no rmal ambi ent condi t ions.-
4.4 Auxiliary devices requi red for proper function of the limit switd,.
Although it was not considered a part of the quali-fication test, an operating lever is requi red for proper operation of the limit switch.
The Namco Controls catalog' lists operating levers of many configurations and materials, it is the users responsibility to chose one suit-able for the application.
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EATE9-90006 INSTALLATION. INSTRUCTIONS b EA180 NUCLEAR SWITCH -4 SILlCONE GA.,KETS -
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THIS SWITCH IS DESIGNED FOR USE IN THE INNER CONTAINMENT AREA 0F A NUCLIAR POWER GENERATING STATION. TO MAINTAIN SWITCH INTEGRITY' THE FOLLOWING INSTRUCTIONS liUST BE FOLLOWED.
6 1.0 ELECTRICAL CONNECTIONS I.
1.1 WIRE PASSAGE THRCUGH SWITCH CONDUlT ENTRANCE MUST BE SEALED IN SUCH A WAY AS TO MAINTAIN THE SWITCH INTEGRITY UNDER REQUIRED SERVICE CONDITIONS. j
.- 1.2 WIRE TERillNALS SHALL NOT BE OF ZINC OR ZINC PLATED MATERI AL'.
k 1.3 SOLDERED WIRE ENDS MUST BE CLEAN AND FREE FROM FLUX.
2.0 INSTALLATION OF TOP COVER -
2.1 ALIGNFENT OF SCREW HOLES OF COVER AND GASKET SH0dLD BE CHECT,ED.
2.2 TCPQUE SCN.WS IN A STAGGERED PATTERN, FROM SIDE-T0 SIDE'.
2.3 TOP CGiL A SCREUS ttUST HAVE BELLEVILLE WASiiER AND 0-RING.
2.5 700,QUE TCP COVER SCREWS 20 INCil POUNDS.
2.5 GASKETS TORN AROUND SCREW HOLES OR OTHERWISE DAMAGED !!UST BE REPLACED.
. 3.0 00 NOT REMOVE BOTTOM COVERS, CHECK SCREWS FOR TIGHTNESS, MUST BE 20 INCH POLNDS.
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NOTE: THF ACOVE INSTRUCTIONS 'ARE TO BE I?,1NTED ON 40-60# B0'ND PAPER APPROX. 4 X 6. '
FCLC ONCE LENGTHWISE AND PACK WITH SWITCH.
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INSTALLATION INSTRUCTIONS .
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V E:.lE3 90051 MA I N T E N M:CE l ':S TRUC T i r N S NE I CI 3 g
, TYPE OF SWI TCH :
EAlSO 11302 REV. H AND OTHER MODELS AS LISTED '
s DESCRIPTION -
EA180 NUCCEAR SWITCH WITH SILICONE GASKETS $
PERIOD OF MFG. TROM FECRUARY. 1980 --
o vi THESE INSTRUCTIONS ARE TO BE USED FOR THE FOLLOW-ING SWITCH PART NUMBERS ANO CORRESPONDING REVISION LEVELS. ,
PART NUllRER REVISION LETTER (S)
- TCP COVER (PART NO. & RATING) EAlSO 11302 - - - - H EA180 12302 -
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CONDUIT END t h EA180 15302 - - - - H EAI80 21302 - - - - H CF FCUSING '
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EA!80 22302 - ---H N. EA180 23302 - - - -H 1680 X C0999 EA180 24302 - - - -H w
n._E v >< i CODE SYSTEM EAlH0 25302 - - - - H I,[R TC SE T., 1979 s I \ \ > EAIE0 31302 - - - - H
'> ],h n7 S E T EA180 32302 - - - -H 979 \ EA180 33302 - - - -H g'.c 4 AND EAR
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EA180 34302 - - '- - H 4
, EA180 35302 - -- -H
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V EA 9 9005 MAINTENANCE INSTRUCTIONS -
- TYPE OF SWITCH: EA180 11302 REV. H AND OTHER MODELS AS LISTED DESCRIPTION : EA180 HUCLEAR SWITCH WITH SILICONE GASKETS
- PERIOD OF HFG.: FROM FEBRUARY, 1990 .
1.0 Ut1 SCHEDULE 0 MAINTENANCE:
In THE EVENT THAT THE SWITCH 00ES NOT FUNCTION PROPERLY.
1.1 CHECK MECHANICAL OPERATION, REMOVE SWITCil IF SLUGGISH,. REMOVE BOTTOM COVER, RELUBRICATE STICKING COMP 0ENTS, USE OIL FROM LUBRICATION KIT (4.2). 00 tJ0T LUBRICATE ELECTRICAL SIDE. .
1.2 IllSTALL BOTTOM COVER, REPLACE GASKET IF DAMAGE 0 (4.4). TORQUE SCREWS TO 20 IN. LBS OR AS SPECIFIED IN GASKET KIT.
1.3 IF SWITCil DOES NOT CARRY OPERATING CURRENT, REMOVE POWER, REMOVE TOP COVER, CHECK OPERATION, CLEAN CONTACTS (4.1). IF CLOSED CONTACT RESISTANCE REMAINS GREATER THAN ONE OHM, SEE 2.3.
1.4 INSTALL TOP COVER. REPLACE GASKET IF DAMAGED (4.3). TORQUE SCREWS TO 20 IN. LBS. OR AS SPECIFIED IN GASKET KIT. . -
1.5 REPLACE BOOT IF DAMAGE 0 (4.7). REPLACEMENT WILL ALSO REQUI.RE LUBRICATION KIT (4.2).
2.0 SCilEDULED MAlHTENANCE:
SEE SERVICE TEMPERATURE VS. SERVICE TIME CHART BELOW TO DETERMINE WHEN Tile FOLLOWING MAINTENANCE SHOULO BE PERFORME0 SERVICE TEtlPERATURE ,
SERVICE TIME 40'C 20 YEARS 4*C 10 "
4 5 C e S
- 60 C 3 2.1 REMOVE SWITCH. REPLACE LEVER SHAFT AND 0-RING ASSEMBLY (4.8). REPLACEMENT WILL ALSO REQUIRE LUBRICATION KIT (4.2),
2.2 REMOVE TOP COVER, CLEAN CONTACTS (4.1). . ,
2.3 REPLACE CONTACT LEVER ASSEMBLY (4.5) THEN CONTACT BLOCK ASSEMBLY (4.6) IF ANY!CLOSE0 CONTACT RESISTANCE REMAINS A00VE ONE OllM.
2.4 INSTALL TOP COVER All0 REPLACE TOP COVER GASKET AND SCREWS (4.3). TORQUE TOP COVER SCREWS T0 i 20 IN. LBS. OR AS SPECIFIE0 IN GASKET KIT. ,
Cusr. nar no. assv no s e r. "
NAMCO CONTROLS -
t uuttss cincawisc srtcmco om ClNCLEVEL C"'* AND, C'"""""C' C *P8""
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o Att oiwensions
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3 2. ANGULAR 2 000' 6 t; t MAIHTENANCE !USTRUCTIONS -
g r ALLstocyc M ACHINED ,et snin,. sdHF ACc5 coces #5 [ DO NOT SCALE 10/16/80 -
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) EA189 90051 1 T '
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89 9 .AINTENANCE INSTRUCTIONS Sj . -
- TYPE OF SWi!CH: EA180 11302 REV. H AND OTHER MODELS AS LISTED i
IC,ii t i : UN : EA180 NUCLEAR SWITCH WITil SILICONE GASKETS
- PERIOD OF MFG.: FROM FEBRUARY, 1990 -
1.0 UNSCllEDUL:0 MAINTENANCE:
lN Tile EVENT THAT Tile SWITCH DOES NOT FUNCTION PROPERLY. .
1.1 Cif ECK MECtfAtll C AL OPERATION , REMOVE SWITCH IF SLUGGISH, REMOVE BOTT0ti COVER, RELUBRICATE STICKitJG COMP 0ErlTS. USE OIL FR0ti LUBRICATION KIT (4.2). 00 NOT LUBR!CATE ELECTRICAL S10E, .
1.2 INSTALL BOTTOM COVER, REPLACE GASKET IF DAMAGED (4.4). TORQUE SCREWS TO 20 Ill. LBS OR AS SPECIFIED IN GASKET KIT.
1.3 I F SWITCH DOES IJ0T CARRY OPERATING CURRENT, REMOVE POWER, REMOVE TOP COVER, CHECK OPERATION, CLEAN C0tlTACTS (l. . l ) . IF CLOSED CONTACT RESISTANCE REMAINS GREATER THAN ONE OHM, SEE 2.3.
1.4 INSTALL TOP COVER, REPLACE GASKET IF DAMAGE 0 (4.3). TORQUE SCREWS TO 20 IN. LBS. OR AS '
SPECIFIED IN GASKET KIT. . .
1.5 REPLACE BOOT IF DAMAGED (4.7). REPLACEMENT WILL ALSO REQUI.RE LUBRICATION KIT (4.2).
2.0 SCHEDULEO MAltlTENANCE:
SEE SERVICE TEllPERATURE VS. SERVICE TIME CilART BELOW TO DETERMINE WHEN THE FOLLOWING MAINTENANCE SHOULO BE PERFORMED.
SERVICE TEHPERATURE_ SERVICE TIME '
40,C 20 YEARS 4
45,C 10 "
- l 55,C e 5
- 60 C 3 "-
2.1 REMOVE SWITCH. REPLACE LEVER SilAFT Atl0 0-RING ASSEMBLY (4.8). REPLACEMENT WILL ALSO REQUIRE LUBRICATION KIT (4.2).
2.2 REMOVE TOP COVER. CLEAN CONTACTS (4.1). . ,
2.3 REPLACE CONTACT LEVER ASSEMBLY (4.5) THEN CONTACT BLOCK ASSEMBLY (4.6) IF ANYJCLOSED CONTACT RESISTANCE REMAINS AB0VE OtlE OllM. '
2.4 INSTALL TOP COVER All0 REPLACE TOP COVER GASKET AND SCREWS (4.3). TORQUE TOP COVER SCREWS T0 i 20 ill, LBS OR AS SPECIFIED IN GASKET KIT.
cust. P ART NO. ass'Y NO HEF NO N CO CONTROLS .
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5-( O) v EAIE9 90051 f4AINTENANCE INSTRUCTIONS o PAGE 3 0F 3 '
TYPE OF SWITCH: EA180 11302 REV. H AND OTHER MODELS AS LISTED N DESCRIPTION : EA180 NUCLEAR SWITCH WITH SILICONE GASKETS PERIOD OF MFG.: FROM FEBRUARY, 1980 m
3.0 SCHEDULED MAINTENANCE:
EVERY 20 YEARS IF SWFTCH WAS CONTINUOUSLY EXPOSED TO SERVICE TEMPERATURE HIGHER THAN 50' C.
3.1 REMOVE SWITCH. REMOVE TOP COVER. REMOVE AND REPLACE CONTACT BLOCK ASSEMBLY (4.6) AND .
CONTACT LEVER ASSEf4BLY (4.5). INSTALL TOP COVER AND REPLACE TOP COVER GASKET IF DAMAGED (4.3). TORQUE TOP COVER SCREWS TO 20 IN.. LGS. OR AS SPECIFIED IN GASKET KI T.
4.0 P,ECOMMENDED INSTRUCTIONS AND REPLACEMENT KITS:
4.1 CCNTACT CLEANING:
CLEAN ALL DEPOSITS FROM CONTACTS WITH CLEAN ALCOHOL OR ACETONE USING Q-TIP TYPE APPLICATOR.
4.2 LUBRICATION PROCEDURE - EA181 10160 (LUBRICANT MANUFACTURER: WILLIAM F. NYE, NEW BEDFORD, MASS.) ,
4.3 TCP COVER GASKET KIT - EA181 10102
. 4.4 SOTT0!t COVER GASKET KIT - EA181 10120
- L.5 CCNTACT LEVER KIT - EA181 10130
- 4.6 CONTACT BLOCK KIT - EA181 10140 4.7 BCOT KlT - EA181 10151 4.8 LEVER SHAFT AND 0-RING - EAl81 10170 (FOR STANDARD SWITCHES) 4 A}SEftSLY KIT LE7FR SHAFT AND 0-RING - EA181 10171 (FOR SHORT TRAVEL SWITCHES EA180 X4302)
ASSEitCLY KlI (SHORT TRAVEL) EA180 X5302)
EA180 X6302) m m
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NAMCO OONTRCLS
+
QTR 105 AUGUST 28, 1980
([) 4.0 SERVI C E CONDITI ONS , l NSTALLATION REQUI REMENTS , MAI NTE-NANCE AND QUALIFIED LIFE (REF. I EEE 323-1974, SECTION 6.2)
(CONT'D.)
4.5 Normal service envi ronmental conditions.
The test enveloped the following rated service con-
~
ditions:
4.5.1 Temperature : Room Temperature to +90 C 4.5.2 Pressure : Ambient 4.5.3 Humidity : 0 to 100% R.H.
4.5.4 Radiation : Total exposure 204 x 10 Rads Gamma 4.5.5 ' Seismic : 0. B . E.
1 - 4 Hz. 0.6 - 9.52 g's
, 4 -35 Hz. 9.52 g's Pl ant induced vibration simulation 333,333
() .
cycles @ 100 Hz, at .75 9's.
4.6 Design Basi s Event condi tions.
4.6.1 Environmental conditions for this type test were derived from IEEE 323-1974, Appendix A, for pressurized water reactors and boiling water reactors.
See Figure 3 of the test report for pres ure/
temperature profile obtained.
4.6.2 Radiation total exposure:
204 x 10 6 Rads Ganna
4.6.3 Seismic
SSE (Same as 0.B.E.)
1 -
4 Hz 0.6 - 9.52 9's
({} 4 - 35 Hz. 9.52 9's 4-4
NAMCO CON 7 Dot s
- QTR 105 AUGUST 28, 1980 A
V 4.0 SERVICE CONDITIONS, INSTALLATION REQUIREMENTS,-MAINTE-NANCE AND QUALIFIED LIFE (REF. IEEE 323-1974, SECTION 6.2).
(CONT'D.)
' 4. 7. Operating cycles.
4.7.1 Test The test swi tch was operated wi th electrical '
load for a total of over 100,300 cycles, 100,200 cycles wear-cycling and a minimum i of 100 cycles during the other tests.
4.7.2 Periodic testing As a Quality Control procedure, randomly selected switches will be heat aged for 400 hours0.00463 days <br />0.111 hours <br />6.613757e-4 weeks <br />1.522e-4 months <br />.at 120'C, then operated for a minimum of 100,000 cycles.
!O J
b 1
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LO i
4-5, k
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.. , . _ , , , . _ , . . . - , _ _ --,.m,,,,.._m.,_.._.___,_ - - , . , -
NAMCO COVrtWS QTR 105 SEPTEMBER 12, 1980
() 4.0 SERVICE CONDITIONS , ' INSTALLATION REQUIREMENTS , MAINTE-NANCE AND QUALIFIED LIFE (REF. IEEE 323-1974, SECTION 6.2)
(CollT ' D . )
4.8 Estimation of Qualified Life The purpose of this section is to provide an esti-mation of qualified life for the EA180 series limit switches enveloped.by this report.
] Qualified life is defined as "the period of time for which satisfactory performance can be demonstrated for a specific set of service conditions." (1) 1 The qualification test subjected the limit switch to several accelerated aging tests which included thermal aging at 120' C for 400 hours0.00463 days <br />0.111 hours <br />6.613757e-4 weeks <br />1.522e-4 months <br /> (5.1) .
4 A primary consideration in estimating qualified life O is to first determine the aging mechanism to which i
the component materials are most susceptible, The limit switch is composed of metallic and organic t
components. (Figurc 7)
The metallic components, per standard practice in the nuclear industry, are considered to be imnune to debilitative aging in the temperature range of '
this test.
- Organic components are susceptible to thermal aging in varying degrees and rates. I t was decided to determine the qualified life of these components O .
4-6 6
NAMCO CCW7sHDLS QTR 105 SEPTEMBER 12, 1980
([) 4.8 Estimation of Qualified Life (Cont'd.)
through the use of the Arrhenius law (2) to mathe-matically extrapolate the thermal aging time / temper-ature to service conditions.
As' explained later on in this section an activation energy number of 0.8 eV is considered to be very conservative for the elastomeric parts-of the limit switch. (2)
Based upon the 0.8 eV the qualified life of the EA180 series' limit switch is 5.0 years at S5.0 C, Figure 8.
The qualified life can be extended to 40 years by periodic maintenance and replacement of the elastomeric-
, components as recommended by Maintenance Procedure
() EA189 90051 (Figure 6).
The organic components can be divided into three (3) groups:
A. Polymeric Lubricants
, B.
Thermoset Plastic Contact Carrier and Contact Block C. Elastomeric Seals .
- 1. The synthetic hydrocarbon grease has a rating of 250'F
[
(121'C) and the aromatic ether based oil is stable to
~
over. 475"F (246'C). (3) Neither the lubricant manu-facturer nor extensive searches of the current chemical literature concerning lubricant has proven useful in b -
4-7 .
0
j.
d s umco co~ms_'- 4 4 .
QTR 105
[ SEPTEtjBER 12, 19'80
() 4.8 Estimation of Qualified Lif'e~(Cont'd.) _~. 9 discovering the thermal aging characteristics of 'i
- these lubricants. However, due to the ratings of f '
these lubricants and the service conditions that- ;:
i they_ will- be subject to it i s N amco Control s ' . care- ,
fully drawn opinion that the application >and amount of lubricant applied will be.of much' greater-conse- ,
quencethakchangesduetothepassage~of. time.
The qualified' life of the lubricant is controlled by the maintenance procedure. -
The thermoset plastic parts are_made of a'n asbestos "
filled phenolic with a_: temperature index of 150 C.
~.
(4) The manufacturer of'the material was not able
() to provide activation energy data, however, a number
~
of widely varying values ha've been located for other
- phenolics, the icwest value being 0.96 ev. (5)
The elastomeric seals for~the limit switch consist of the silicone rubber gaskets and an ethylene propy-lene o' ring shaft seal. The ethylene propylene, boot serves only as an oil retainer and dust shield and therefore, not considered as a seal .
~
A study and test by Parker Seals (6) concluded that the o' ring seal life appeared to be independent of 4
thermal aging temperatures below 200 F (93 C) and that seal life for ambient temperatures of Si c to ln) .
. 4-8
,__e ,,__.m , s-_,___ _, --- _-.._- _ _ - . . - . . , - , . _ _ _ . - , ,
~
- q. umco covrncx s T
7 jlF' j' w QTR 105
.'~.
SEPTEMBER-12, 1980
) :4.8 Estimation of Qualified Life (Cont'd.)
se c ,
75S c ranged from 5 to 15 years.
f Parker was unable to provide ~an activation energy number.
. .The manufacturer of the silicone rubber gasket ma-l ~
terial was not able to supply aging data on the 7
2 specific compound used, however, data (8) on this
,- type:of material indicates a normal service life n
f of 30 to 20 years at 250'F (121'C).
c A study by
)
1M rtin Marietta (7) indicates an activation energy-number of 1.14 for silicones.
As previously stated; based upon the abo'e v and through contacts with others in the nuclear industry (2) an
, act.ivation energy number of 0.8 eV is considered to "0 ,
be very conservative for the elastomeric parts of E
the limit switch.
Namco Controls recognizes the importance of thermal aging as a part of qualification and has therefore
- established a test program to investigate the thermal x aging characteristics of the limit switches and,of
- the materials used in them.
This section will be amended as new information becomes
_ available from these tests and other sources.
This s~tatement is based upon the best Engineering in- :
4 x formation available to us at this time. '
4-9 l
I i
. _--- _ ~- . _.- - .- -- _ _
(
NAMCO CONTnct.S SEPTEMBER 12, 1980 QTR 105
() 4,8 Estimation of Qualified Life (Cont'd.)
Bibliography t
(1) IEEE Standard 323-1974, Qualifying Class IE Equipment for Nuclear Power Generating Stations (2) Namco Controls' Report LP 10835 Thermal Aging Data (3) Namco Controls' Report LP 10836 Lubricant Data, Thermal Aging (4) Namco Controls' Report 10837 Thermoset Plastic Data, Thermal Aging (5) Durez Division of Hooker Chemicals and Plastics Corporation: North Tonawanda, New York; A Test to Determine Thermal Aging Characteristics
,Q -
v of Certain Materials, November, 1969.
(6) Parker Seals, Culver City, California, 90230; Stress Relaxation Long Term Aging, E740 Nuclear Report No. 10,4781, January 10, 1979.
l (7) Martin Marietta Corporation, Denver, Colorado; Long Life Assurance Study for Manned Space Craf t j Long Life Hardware, Volume I, Summary of Long
. Life Assurance Guidelines, December, 1972 l (8) Namco Controls' Report LP 10838 I Silicone Rubber Data, Thermal Aging ,
I
% {
J
~
- l. -
4-10 1? <
- f. ;
NAMCO CONTnot.S
, QTR 105 April 3, 1980 4
4.0 -SERVICE CONDITIONS, INSTALLATION REQUIREMENTS, MAINTE-
- NAt1CE AtlD QUAllFIED LIFE (REF. IEEE 323-1974, SECTION 6.2)
(CONT'D.)
List of Non-Metallic Materials Used in - the Qualified Limit Switch a
t Material _
Where Used Silicone rubber Top cover gasket Bottom cover gasket EPDM
- 0 ring (lever shaft) 0 Boot ring ((cover leverscrews) shaft) h .
Synthetic hydrocarbon grease w/ fluorocarbon Lubricant Aromatic ether based oil l ub ricant Thermoset plastic . Contact block Phenolic-asbestos fiiled Contact carrier i
I s
Figure 7 i
e 4 J
a_-.,- , . , , ~ . . . , , , . ,, ,-..---,_r-- -, , ,,, -- ,- -.
NAMCO CONTr&S ARRHEtJIUS CURVE FOR ESTIMATED QUALIFIED LIFE G
U i I I i l i i i I I i 1111 40 YRS.
20 YRS.
~
10 5 / , 10 YRS.
2 5.0 YRS _
3 _
5 YRS.
4 10
_. m __ : = __. 1 YR.
Z Z
= -
0.hv 3 10 3 __
O '
E E E
w -
400 HRS. a.
5 -
r _
/
2 10 2
l i I ! l ! ! ! I 1 llll 240 160 120 100 80 60 40 20
>- TEMPERATURE, C $
FIGURE 8 4-12
NAMCO CONTF?Ot.S
.. QTR 105 AUGUST 28, 1980 t
- ({}- 5.0 TEST SEQUENCE AND RATIONAL FOR TEST CONDITIONS .
- 5.1 Test sequence for T.R. 3613-PP.
The test sequence was conducted per Test Plan ;
LP10767-3. This test sequence was chosen because i
lt presents the limit switch with the most severe 4
(conservative) conditions in keeping with the IEEE standard guidelines:
Inspect for damage.
i Test for baseline data.
1
- Thermal aged, 400 hours0.00463 days <br />0.111 hours <br />6.613757e-4 weeks <br />1.522e-4 months <br /> @ 120'C.
a .
I Performance test.
l Mechanical wear age.
l Performance test.
() '
Total radiation exposure 204 X 10 6 rads.
Performance test.
Seismic testing.
Performance test.
, DBE envi ronmental test.
Performance test.
Final i nspection.
5.2 Rational for electrical loads used during qualifi-cat, ion testing of nuclear swi tches.
The Nanco Controls' quali fication test procedure includes mechanical aging of the switch for 100,000 cycles, minimum, with an electrical load of 500 milliamps at 100 volts DC on the contacts.
)
5-1
- ___._._,...,,_,,m _m_. - _ . . _ . _ ..c , _ _ . , , . . . . , , _ . , _ , , , , . . . _ . , ...#. . , , , _ , , . _ . _ . , . _ _ . , , . _ . -_ . _ . . . .
~~co oc,v mo,_ s QTR 105 AUGUST 28, 1980 o
l-) 5.0 TEST SEQUENCE AND RATIONAL FOR TEST CONDITIONS (CONT'D.)
5.2 Rational for electrical loads used during quali fi-cation testing of nucicar switches. (Cont'd.)
The purpose of this test is to simulate the life-time switching functlon.
The design / nameplate ratings of these switches are the same as the equivalent commercial versions which are UL and CSA listed. (Snap switches per UL1054) The electrical ratings are for resistive loads. As an example, the 125VDC, 5 amp rating is for continuous loads and make or break conditions (See Section 3.3).
Our experience with this series of swi tches has
'b,,
been that when they are operated at rated voltages and currents, the contact surfaces tend to be self cleaning and/or the potential of the circuit is sufficient to break down films or oxides that might form on the contact faces. On the other hand, low voltages / low currents may not break down the films and/or oxides, the re fo re , provide little contact surf ace renewal .
Testing a swi tch wi th two di f ferent potentials (V/A) is impractical and would not represent a true switch application. ,
ba .
5-2
mdco ecxvtro_s QTR 105 AUGUST 28, 1980 Q 5.0 TEST SEQUENCE AND RATIONAL FOR TEST CONDITIONS (CONT'D.) :
5.2 Rational for electrical loads used during quali fica-
- tion testing of nuclear swi tches. (Cont'd.)
Therefore, we chose 100 volts DC and 500 milliamps
(.5 amps) resistive as being the representative conservative contact loading for mechanical aging.
An electrical load of 86 milliamps ( 086 amps),
100 volts DC was used to check for proper operation .
of each circuit during all other test procedures.
5.3 Rational for total radiation exposure.
See the test plan (Page 19 of 37F).
It is Namco~ Controls Engineering's opinion that the combined normL1 and DBE exposure is the most O ,
conservative redietion test condition.
4 5.4 Rational for single axis sinusoidal seismic testing.
i Section 6.6.2 of IEEE 344-1975 provides for single axis sinusoidal seismic testing if there are no resonances or interactions in the frequency range required.
Previous Engineering analysis of switches simi f ar to the EA180 series found that no natural frequen-cies below 46.6 Hz. exists on the electrical side of the switch.
! Engineering analysis did indicate that the natural frequency of the latch (Item 19) is 10.8 Hz. and O 67 7 "' ' " '" '"'"r" """- "r""' "" *' '
testing of a similar switch (FIRL Report FC3879) 5-3
.- -._.m. , . . . _ , - . _ . , _ . _ , , - , . _ . . . . , , . _ , , , , _ . , _ _ . - _ _ - _ _ _ , _ . , , , , . _ .
IVAMCO CONTRCLS QTR 105 AUGUST 28, 1980
.O 5.0 TEST SEQUENCE AND RATIONE FOR TEST CONDIT0NS (CONT'D. )
5.4 Rational for single axis sinusoidal seismic testing.
i (Cont'd.)
and the cross coupling tests in T.R. 3613-PP proved j that cross coupling is not a factor during seismic l testing.
5.5 Rational for DBE envi ronmental test, i
The DBE condi tions of T.R. 3613-PP were more severe t
than test plan requirements. Test plan requirements were derived from I EEE 323-1974, Appendix A, for ;
i i
pressurized water . reactors and boiling water reac-
! tors and iEEE 382-1972.
O .
4 k
O
! 5 - 4' 4
6 0
,v,--, --+-,a -..-,,-r- ,-~ --n - , --a , - , - - - - - - - - - - --
NAMCO CO*VTnot S QTR 105 AUGUST 28, 1980
,-~
V 6.0 INSPECTION AFTER TEST Af ter the completion of all tests and final examination at the test facility the limit swi tch was returned to Namco Controls for Engineering review.
The memo of February 29, 1980, Page 6-2, is a record of this review. None of the listed items were considered to be failure modo criteria. The swi tch funct ioned prop-crly during performance testing.
V e
(h V>
6-l'
~17 NA/VICO CONT /2?OL.S QTR 105 . April 3, 1980 D AT E : FEBRUAliY 29, 1980
(
orrict:
To: LP10767-3 rnou: G. COVELL O F l~ lCE :
sunJr.cT: 1ECE QUALIFICATION TEST PROGRAM
> - -..n,. ..,,.-- n _ _ _ . _ ,
OBJECTIVE:
Review EA180 Swi tch //138-90 which has completed Quali fication ~
Testing. .
OBS ERV AT I 0llS :
Contcct Resistance:
AB . 2626 omits CD - .0183 "
EF - .1206 "
Gli - .0531 " -
y~.
U 1. Zero torque to loosen contact block screws.
2 '. Operative lev'er shaft moist from o ring to operating lever, (Nye 438 Oil).
- 3. Shaft dry from o ring to boot groove.
16 EPDM boot dry.
- 5. Contact lever shaft had a slight film of Ilye 438 Oil on it.
- 6. Plating on roller fl aki ng of f.
- 8. Most of the flye 734A Grease had dried out.
- 9. Normal wear on contacts.
- 10. Slight amount of grease on roller, slide and torsion spring.
n L) GC/nlm ,
//
cc: J. Dendohaitin ,4 f;',,,,,g L. Brouninq l J. Bu.ogany f T. Wnd 6-2 -
NA4fCO CONTROLS QTR 105 . April 3, 1980
() 7.0 COMMENTS,
SUMMARY
AND CONCLUSIONS 7.1 Conclusion Based upon our review of the test report T.R. 3613-PP it is our opinion that the EA180-11302/EZ106G3-90 series limit swi tch passed the performance limits, in Section 7 of Test Pl an LP10767-3, throughout the tests.
- Performance limits
Closed circuit current remained wi thin .001 anperes
! of .086 amperes @ 100VDC.
4 Open circuit resistance (insulation resistance) re-mained greater than 50,000 OHMS (5 Megohms).
Closed ci rcuits did not open, for more than 2 milli-() seconds, during seismic testing.
7.2 . Failure to transfer, Page 6 of T.R. 3613-PP.
Based upon the Engineering review of the test swi tch-and the test set-up, it is our opinion that the one f ailure to transfer was a random case that may have 4
been aggravated by the test set-up.
7.3 Seismic qualification of the EA180-ll302 series switches was conducted by Dr. E. J. Wal ters and Associates, June, 1977, (Section 10.1, Appendix B).
The following comments refer to this report.
7.3.1 Switches #32, 33 and 45 are mechanicall and 7
electrically similar to #138-90.
.O .
7-1
- l
!VAMCO COtMTRCM.S QTR 105 April 3, 1980 0 7o co""e"TS,
SUMMARY
AND CONCLUSIONS (CONT'D.)
7.3.2 Swi tches #32, 33 and 45 were subj ected to thermal aging, wear aging and radiation ex-posure (204 x 10 6 Rads) prior to seismic testing.
-7.3.3 Resonance search, see Figure 9 for a plo.t of acceleration amplitude (g) versus fre-quency (Hz.) for this test.
7.3.4 Fragility test, see Figure 10 for a plot of acceleration ampli tude (g) versus fre-quency (Hz.) for this test. A plot of sine dwell point from test T.R. 3613-PP, switch #138-90 is included to raise the
() tested g level.
Note: All curves represent test limits because no contact opening (exceed-ing 2 msec) were encountered.
7.3.5 Switch mounting, standard switch mounting (side of housing) was used for all tests.
7.3.6 Switches #32, 33 and 45 were not subjected to plant induced vibration.
7.4 OBE seismic test requi rements of I EEE 344-1975, Section 6.1.4.
The OBE test requires that the limit switch be subjected to 5 OBE's and 1 SSE.
7-2 -
4
q QTR 105 April 3, 1980
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, FIGURE 10
- 7-4
.- - -- ------e- -9
NAMCO CONTROt S QTR 105 . April 3,1980 0 7.O COMMENTS,
SUMMARY
AND' CONCLUSIONS (CONT'D.)
17.4 OBE seismic test requirements of lEEE 344-1975,
- Section 6.1.4. (Cont'd.)
This requirement has been-exceeded during_ fragility testing. This test subjects the limit switch to a series of 60 second (minimum) sine dwells at six-i teen f requencies in 'each of the three (3) axis.
The sine dwell tests provides a minimum of 9,018 stress cycles per axis for a total of 27,054~ (min-imum) for the test.
For log data regarding fragility testing see Sec-tion 10.1, Page 6 of 148 and Pages 6, 7, & 8 of 190.
7.5 Sei smic quali fication of #138-90 limi t switch.
(:) -
Limi t swi tch #138-90 is quali fied by similari ty to switches #32, 33 and 45 per Dr. E. J. Wal ters' re-port, Section 6.1, Appendix B. Additional fragility testing was performed in the'10-20 Hz. range per
. T. R. 3613-PP.
Limit switch #138-90 was subjected to seismic con-di tioning which included all the sine dwell and
, plant induced vibration test wi th ci rcui ts energized throughout the tests. Resonance search testing is not required.
4 0 .
7-5 i
0
-me. .- ..__r . . , _ _._ - - . _ . _, -._., _--_ ..- -.. .._._-.,m- ---.-s- - - . . . . - _ , . _ . .
NAMCO COVITK'W.'3 QTR 105 AUGUST 28, 1980 U,, 7.0 C0141Ef1TS ,
SUMMARY
AtlD C0tiCLUS 10 tis (C0llT' O. )
7.6 Conduit scaling, the test report states that teflon tape was used to seal the conduit threads during LOCA test, it must be noted that teflon tape was not used during radiation simulation and further, that no attempt was made to qualify a type of thread sealant. During installation of the limit switch it is the customers responsibi1itf to main-tain the integri ty of the switch enclosure.
.O
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7-6 e
NAMCO CCNTROt.S QTR 105 . April 3, 1980 r-3-)T
8.0 DESCRIPTION
OF PRODUCT IMPROVEMENT CHANGES 8.1 Limit swi tch #138-90 was made to bill of. materials EZ10683-90/EA180-11302 and incorporated the follow-ing product improvement changes: (B/M ltem No. )
Item 7 Bushing (for contact-lever shaft)
Changed from bronze to P/M bronze, oil impregnated, item 17 Latch Stud Changed finish f rom zinc plating to nickel plating, item 27 Contact Block Changed material from glass filled poly-ester to asbestos filled phenolic thermo-O set plast.ic.
Item 85 Contact Carrier Changed material from glass filled poly-ester to asbestos filled phenolic thermo-set plastic, item 95 Lever (internal)
Material changed from bronwite to brass.
Item 100 Lever Shaft Added oil groove.
Item 112 Top Cover Added chamfor to screw holes for o ring.
()
8-i l
t
~4uco covmo<_s QTR 105 . April 3, 1980 L()
8.0 DESCRIPTION
OF PRODUCT IMPROVEMENT' CHANGES 8.1 Limit switch #138-90 was made to bill of materials-
- EZ10683-90/EA180-ll302 and. incorporated the follow-ing product improvement changes
- (B/M ltem No. )
(Cont'd.)
Item 116 Top Cover Screw Assembly Was: #8-32 Binding Head Screw with Lock-washer.
Now: Special #8-32 SEMS Screw with Belle-ville washer and EPDM o ring.
Item 114 Top Cover Gasket Was; impregnated NBR/ Asbestos Now: Silicone rubber 4
O Item 128 Bottom Cover Gasket
.i .
j Was: Impregnated NBR/ Asbestos Now: Silicone rubber 1
Item 131 Bottom Cover Screw Assembly EPDM o ring added to a special flat head screw.
i Item 133 Boot
- Materi al changed f rom silicone . rubber to EPDM.
e 1
8-2 i ,
- - - - - ..n., , , . - - . , _ - - . - -, . , . - - ,
NAMCO CC>NTROL.S QTR 105 AUGUST 28, 1980 !
I 9.O ATT ACHf4Ei1TS 9.2 EA180 11302 Limit Switch Assembiy 9.3 EA180 14302 Limit Switch Assemb!y 9.4 E1060 53300 Operating Lever Assembly i
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