ML20205M111
| ML20205M111 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 04/09/1986 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Harold Denton, Tam P Office of Nuclear Reactor Regulation |
| References | |
| 2NRC-6-033, 2NRC-6-33, TAC-62880, NUDOCS 8604150086 | |
| Download: ML20205M111 (47) | |
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'Af 2NRC-6-033 (412) 787-5141 Nuclear Construction Division Telecopy N"u' g" HIP 'i5 5 April 9, 1986 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, DC 20555 ATTENTION: Mr. Peter Tam, Project Manager Division of PWR Licensing - A Office of Nuclear Reactor Regulations
SUBJECT:
Beaver Valley Power Station - Unit No. 2 Docket No. 50-412 Safety Parameter Display System (SPDS) - Request for Additional Information ] 1
REFERENCE:
DLC Let t er 2NRC-5-151, dated December 20,1985, " Safety Parameter Display System (SPDS) - Request For Additional Information". Gentlemen: Attached to this letter is a revised response to the staff's request (Question 420.01, Isolation Devices) for additional information concerning the i Safety Parameter Display System (SPDS). The NRC staff requested that the I response be revised to include the technical support information on the docket l rather than referring to auditable records on site. Please direct any comments relating to this submittal to Mr. E. Eilmann. DUQUESNE LIGHT COMPANY By )
. J. Carey V Vic President ETE/ sip NR/SPDS/ETE Attachment cc: Mr. L. Prividy, NRC Resident Inspection - w/ attachment 8604150086 860409 PDR ADOCK 05000412 F PDR t________
* . ?
ATTACHMENT Additional Information Safety Parameter Display System Instrumentation and Control Systems Information Question 420.01: " Isolation Devices"
- a. For each type of device used to accomplish electrical isolation, describe the specific testing performed to demonstrate that the device is acceptable for its application (s). This description should include elementary diagrams when necessary to indicate the test configuration and how the maximum credible faults were applied to the devices.
Response
, 1. Four isolator models are used to isolate Class 1E signals from the Emergency Response Facility Computer System. The two analog isolators used are Westinghouse Models 2837 A 12 G02 and 2837 A 12 G03. The two digital (contact) isolators used are Struthers-Dunn Models CX 3916 NE and CX 3918 NE. s a
- 2. Specific testing performed for each isolation device is described in the EQ documentation package for the purchase order. Three purchase orders are involved. The testing description is listed below:
P.O. Test Information Applicable Model No. , 2BV-001 WCAP-8892A 2837 A 12 G02 2837 A 12 G03 2BV-723 WCAP-8892A 2837 A 12 G02 l 2837 A 12 G03 2BV-739 See EQ documentation CX 3916 NE package and 2BVS-739 CX 3918 NE WCAP-8892A is in the NRC's possession. For the digital signal isolators, additional information can be obtained from Specifica-tion 2BVS-739 and the environmental qualification documentation package for Purchase Order 2BV-739. The complete environmental qualification documentation package is in DLC's possession and is available for audit as necessary. Supplement No. I to this report contains an excerpt of the testing report. Paragraphs 3.4.1 through 3.4.19 contain requirements for testing. Figures 5 and 6 are elementary diagrams of the test configurations. 5903A-12241-B4 1
6 i Question:
- b. Data to verify that the maximum credible faults applied during the i test were the maximum voltage / current to which the device could be exposed, and define how the maximum voltage / current was
- determined.
i
Response
4 i Each test report describes the testing configurations used, parameters selected, and how the maximum voltage / current was determined. BVPS-2 satisfies the assumptions of WCAP-8892A for analog signal isolation. Supplement No. 2 contains test descriptions, data, and conclusions j from the tests conducted. f i Digital signal isolators are rated at 120 V ac and 125 V dc. i Maximum voltages were determined by assuming a single failure at a 4 480 V system or cable plus 10 percent margin or a comparable de failure with a 13.6 percent margin. The fault currents were determined by the maximum current-carrying capabilities of No. 12 conductor cable, assuming a fault at 30 ft from the source. The values selected are: Maximum ac voltage: 480 x 1.1 = 528 Maximum de voltage: 480 x 1.136 = 545 Maximum Current: 2,000 A Question:
- c. Data to verify that the maximum credible fault was applied to the i output of the device in the transverse mode (between signal and j return) and other faults were considered (i.e., open and short l circuits).
Response
. Refer to WCAP-8892A for data describing tests for analog isola-tors. Data describing tests for digital isolators are enclosed in Supplement No. 2 to this report on page 30 and pages 39 through 45.
Question: f
- d. Define the pass / fail acceptance criteria for each type of device.
i s 5903A-12241-B4 2 __- _ -~. . . _ _ _ _ , _ _ - - _ . . _ __ _, . . . . _ _ _ _ _ _ , _ - _ _ _ . _ . _ _ , -
Response
Refer to WCAP-8892A for information regarding analog signal isolators . Pass / fail acceptance criteria for digital isolators are listed in Paragraphs 4.1 through 4.4 and 4.6 of Supplement i No. I to this report.
, Question:
- e. A commitment that the isolation devices comply with the environ-mental qualifications (10CFR50.49) and with the seismic qualifi-cations which were the basis for plant licensing.
Response
The isolation devices do comply with the environmental and seismic qualifications which were the basis for plant licensing. I Data to substantiate this commitment are contained in WCAP-8892A l and Struthers-Dunn Test Reports 6060 Rev. E, 6060-A, and 6416A.
- These test reports are in DLC's possession and are available for audit as necessary. <
I Question: i f. A description of the measures taken to protect the safety systems i from electrical interference (i.e., Electrostatic Coupling, EMI, Common Mode, and Crosstalk) that may be generated by the SPDS.
Response
The Emergency Response Facility Computer System (ERFCS), in which the SPDS software resides, is installed within the Emergency Response Facility, a building located approximately 1500 ft from the plant. Distance is expected to minimize the potential for
- interference. Inputs in the plant are installed in accordance
- with the manufacturer's (Bailey Controls Co.) installation manual which contains stringent guidelines for minimizing noise pick-up, cross-talk, signal distortion, and attenuation.
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STRUTH ERS-DUNN INC.
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PITM A N, N. J. , l b - STRUTHERS -DUNN TITLE Struthers-Dunn Procedures for DATE [. PROCEDURE (S.D.P.) Qualification Testing of CX3916 gj3779 NUMBER Isolator per Stone & Webster spec 2BVS-739 332-A IEEE 323, 1974 APPLICABLE DOCUMENTS APPLICABLE DRAWINGS . Stone & Webster specification i number 2BVS-739, and
- IEEE 323, 1974 IEEE 344, 1975 -
Tyyy a;n1 107g i ORIGINAL DOCUMENT PREPARED BY: W- U- FM* ' APPROVED BY AND DATE: ' e / i l~ fl f) / /
- CHANGE RECORD U \/
R. i.i D.i. D...,i,u .,Cn. . R. .,: ,";;'Q"' A 8-3-79 Per 7-6-79 transmittal from Stone & W.W. Ege W.W. Ege Webster
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CHANGED:
- M Title Page 2, Omit EM Susceptability,
- I' 3 ^ 2 ad4 Fig. Fi '
2.0 from 5'. l 6W $o.2.6
- 4W l 3.3 add locknuts 3.4.4 and 3.4.5 reverse 3.4.6 add "See Fig. 6"
. and repeat"Hi Pot per 4.3" l l 3.4.8 omit, shift subsequent numbers j .
, back.
i 3.4.12 add "See Fig. 5" *; 3.4.14 add Repeat 3.4.1-3.4.3 - Add line "10 yr. qual. complete" , 3.5 from"5 days" to"2 was.ks"
- t l
4.1 add meter info, and "h.paat with
- l reverse polarity" l 4.2 add Scope Info !
. I revise time criteria j i ; 4.3 add breakdown criteria : l 1 4.4, 4.5 add "See Fig. 5" ! l , 4.6 add "See Fig. 6" i j arrange spacings to cla'rify. ' add criteria - no damage etc. I i p# ~~=
} 4.8 omit - shift subsequent nos.
4.9 add materials note
- l l
add checking info. l Add Fig. 5
, Add Fig. 6 B 8-31-7 i Revision made to pg. 2 & 3 of AppendiaPT.W. Ege
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STRUTH ERS-DUNN INC. g PIT M A N, N.J. e'. STRUTHERS-DUNN TITLE : Struthers-Dunn Procedures for DATE: PROCEDURE (S.D.P.) Qualification Testing of cx3916 NUMBER Isolator per Stone and Webster 332-A Spec. 2BVS-739 S/3/79 IEEE 323, 1974
~
APPLICABLE DOCUMENTS APPLICABLE DRAWINGS Stone & Webster specification Number 2Bvs-739, and IEEE 323, 1974 IEEE 344, 1975 IEEE 501, 1978 ontatnAL, cocuhtenT PntPAntD sy: W. W. E4e APPROVED BY AND DATE: CNANGE RECORD Revision Date Description of Chonge Revised By: ,
}, c 8/31/7 i Delete 4.5 Fast Transient - P. 2, W.W.Ege ggy P. 3, P. 6 and Fig. 1. Fig. 4 I'[~ 7, ,
% 7 1 3
P. 7 change 10 to 105 D 11/5/79 Para. 3.4.15. Changed Sample identi- ggd .l.% J 7,7, fication, numbers 10 and 11 to 11 and 12. / Para. 3.4.16. Same as above. - Above changes made to correct errors in original write-up. Following changes per Stone and Webster Dw791015, 10/16/79 l Para. 4.2 Timing Revised: was: oper. time is that which elapses , from dis-connection of input and ' ( opening of conts. l Is now: oper. time is that which s, g elapses from energization of input -
- g. , to closing of conts.
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STRUTHERS-DUNN INC. -
.- PITM A N, N. J.
'.. , STRUTHERS-DUNN TITLE : Struthers-Dunn Procedures for DATE s
- PROCEDURE (S.D.P.) Qualification Testing of CX3916 ,
NUMBER tor per Stone & Webster 332-A Spec 2BVS-739 8/3/79 f IEEE 323, 1974 l
~ 1 APPLICABLE DOCUMENTS APPLICABLE DRAWINGS Stone & Webster specification number 2BVS-739, and )
IEEE 323, 1974 -
~
1 3 IEEE 344, 1975 IEEE 501, 1978 i 1 4 ORIGINAI. DOCUMENT PREPARED BY:
*
- I APPROVED sY AND DATE:
l l CHANGE RECORD Revi.i.a Dei. D...rien .e Cn.... R., . e: r ,,'y,
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s D 11/5/79 Para. 4.3 HiPot - Revised: i i was:1. Input to. Barrier (each term) ) ]
- 2. Output " # "
( " ") I . 3. Input to Output " " l Is Now:1. Inputs (tied together). to Barrier and Outputs (tied { together) ' i-
- 2. Outputs (tied together) to Barrier and Inputs (tied together) .
Figure 5 SWC and Fast Transient . Added: Common Mode Applic.to SWC Applic. Points. f~ 3 Para. 4.6 Destr. Fault Test Deteced: Step 1. Apply 550 VAC, 1.25X125vDC
. 10,000 l
- current. l 1
Step 2. Apply 550 VAC, 2.5X(12.5Ma.) current. 1 Changed Step 3,4,5 ref. numbers to j p ,J. 1,2,3. i \
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STRUTHERS-DUNN INC. . PITM A N, N. J. kI , STRUTHERS-DUNN PROCEDURE (S.D.P.) TITLE : Struthers-Dunn Procedures for Qualification Testing of CX3916 DATE: Is lator per Stone & Webster 8/3/79 NUMBER 332-A Spec. 2BVS-739 IEEE 323, 1974
~
' APPLICABLE DOCUMENTS APPLICABLE DRAWINGS Stone &, Webster specification number 2BVS-379, and .
IEEE 323, 1974 IEEE 344, 1975 IEEE 501, 1978
*
- I" ORIGINAL DOCUMENT PREPARED BY:
APPROVED BY AND DATE: , CHANGE RECORD Revision Date Description of Change Revised By: g
), :
D 11/5/79 Fig. 6, Destr. Fault Test Deleted. Steps l',. 2 Changed Step 3 and 4 ref. numbers to 1 and 2. Step 1 (was 3) Revised: Was: I 82. Coil may or may not burn open.
. Is Now Apply until coil stabilizes.
E 4/1/81 Para. 4 4 Surge Withstand Capability '3 . application time was 3 sec. is now U ' 2 sec. minimum [4/6
~
Para. 4.6 was 550 VAC and is now' 524 VAC (Fig . 6) was 142 VDC is now 132 VDC (Destructive to output) applies to item 4 - was 5 .
--- Para. 4.9 was .68 electron volt I is now .73 Add Fig. 2a l
- Para. 3.4.18 Add units 13, 14, 15 AddFih*419 cy W
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~ a S. D. R 82 332-A TITLE:SEE TITLE PAGE DATE:
8/3/79 TABLE OF-CONTENTS , 1.0 Scope 2.0 Description of Test Samples 3.0 Test Program 3.1 Qualification 3.2 Sample size and Identification 3.3 Mounting 3.4 Testing Routine 3.5 Test Witnessing 3.6 Test Reports 4.0 Test Procedures 4.1 PU/DC Voltages 4.2 Switching Time 4.3 HiPot 4.4 SWC *
-4.0 rc:t W:: icet delete 4.6 Destructive Fault Tests 4.7 Radiation 4.8 - Seismic A 4.9 Aging .
F ;' 4.10 Humidity j
- Appendix I Radiation Exposure (See 4.7)
Appendix II Seismic Testing (See 4.9) rig. 1 T::t T :n icat Oiz- it delete Fig. 2~ Arrhenius Plot *
. Fig. 3 Humidity Cycle Fig. 4 Testing Routine Chart l Fig. 5 SWC and Fast Transient Application Points
! Fig. 6 Destructive Fault Tests " A "e FK GV . . . - .-. . 2
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? TITLE:SEE TITLE PAGE DATE:
S. D. P. # 332-A 8/3/79 I 1.0 Scope. This procedure outlines the detailed methods and requirements for Qualification Testing in ' accordance with Stone and Webster specification
#2Bvs-739 on performance, as well as Seis!mic and Temperature Aging per IEEE 323, 1974.
2.0 Description of Test Samples. S-D Part No. CX3916 l Reed Switch Isolator. Input 125VDC, 2.4 watts, Out:- put 500VDC, 0.5 amp, 10 watts max., 1500VDC, minimum
' breakdown, single pole, normally open.
I 3.0 Test Program 3.1 Qualification. Qualification inspection shall be performed on sample relays produced with equipment and procedures normally used in production. ' Sample Size and Identification. Fifteen units shall 3.2 be numbered i1 through 915. . 3.3 Mounting. Five Groups of 3 each shall be mounted .in 11 gauge steel panels 12" X 4", through openings
\
! / 4^ '1.100 X 1.940 ort 4" centers, by means of three 98marews
! and locknuts, each.
~
3.4 Testing Routine. Perform the following on units #1 through #15.
~
3.4.1 FU/D0 Voltage per 4.1 Repeat with reverse polarity on both input and output. i 3.4.2 Timing per 4.2 Repeat with reverse polarity on both input and output. . ,i 3.4.3 HiPot per 4.3 2.t.t ?::: T :::icnt p;; 4.5 - delete
; 3.4.5 Surge withstand Capability per 4.4 i
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S. D. P. at 332-A TIT'LE:SEE TITLE PAGE DATE: 8/3/79 3.4.6 Destructive Fault Tests per 4.6 on units il, 92, 93 i See Fig. 5 l on Unit #1 Input AC)
#2 Output AC) Units destroyed
#3 Output DC) -
Repeat HiPot per 4.3
. 1 3.4.7 Radiation per 4.7 on 64 through #15 3.4.3 Seismic per 4.9 on #4 through #15 3.4.9 Hi Temp. Aging for 75 days per 4.9 V Unit 64 through #9 with contact load of 30ma,142Jh)C, i Unit #10, #11 coil on continuously 9 142VDC. #12 I
coil off
- 3.4.10 Humidity, Units #13, 14, 15 per 4.10 t
3.4.11 Repeat 3.4.1 through 3.4.5 on units #4 through 515 3.4.12' Repeat Destructive Fault Tests per 4.6 on Units #4,
- -}' i . 47, 810 .
- See Fig. 6 on Unit i4 Input AC)
! #7 Output AC) Units Destroyed
~
#10 Output DC) 3.4.13 Repeat Seismic per 4.8) #5, 88, #11 i
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3.4.14 Reat 3.4.1 through 3.4.3 on 45, 98, til 3.4.15 Hi Temperature Aging for added 225 days (300 total) , per 4.10 Units 65, #6. 68, 89 with contact load of 30ma,142VDC, Units #11 Coil on continuously at 142VDC, .
#12 coil off 3.4.16 Repeat 3.4.1through3.4.5onunits45,d,8,'S,11,],)
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V 9 I !I S. D. P. # 332-A TITLE:SEE TITLE PAGE DATE: 8/3/79 , 3.4.17 Repeat Destructive Fault Tests per 4.6 On Unit #5 Input AC ) , On Unit #8 Output AC ) Units destroyed
! . On Unit #11 Output DC )
l 3.4.18 Repeat Seismic per 4.9)'on Units 46, 9, 12, 13, 14, 15 i j 3.4.19 Repeat 3.4.1 through 3.4,3 on Units #6, 9,12,1.3, g, , J 3.5 Test Witnessing. Struthers-Dunn is required to allow l' Stone & Webster /Duquesne Light free access to all test facilities. Two (2) weeks prior notification is re-l quired before actual test sequences are perfonned tc, allow attendances of Stone & Webster /Duquesne Light Co ~ representatives. l I
- 3.6 Test Reports. At the completion of 3.4.4 a report
! shall be made for a 10 year. accelerated life. At i completion of 3.4.19 a final report for a 40 year
; accelerated life shall be written.
l - These reports .shall present results, data and all in-
! ' )2 -
- formation necessary to show completion of testing in accordance with this instrument. Upon completion of each segment of testing, 10 complete reports shall be j forwarded to Stone & Webster Engineerihg Corp.
i
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4.0 Test Procedures . j 4.1' PU/DO Voltages. With indicating lamps monitoring the l . output terminals, a variable source of DC voltage shall . be applied to the input terminals and gradually in- . < creased until contacts at the output indicate closure. I voltage shall then be reduced gradually.until contacts . indicate open.
! The PU/DO voltages shall be measured by a Weston i Model 911, 0-300VDC meter with 1% accuracy ( or
- equivalent)
J 4
; eussesmusemane ama.
l . .. . . 5 1
I .
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I i I I . j i S. D. P. # 332-A TITLE:SEE TITLE PAGE DATE:
- 8/3/79 i
i 4.1 PU/DO Voltages Con'd. - ! at 120'F Pick-up must occur before 90VDC, thus , at 75'F Pick-up must occur before 82VDC Drop-out must occur no lower than 10VDc at 75'F Repeat with reverse polarity. , 4.2 Timing shall be measured by means of a Tektronix Model 503 oscilloscope (or equivalent) with 54 accuracy at l 1 msec /cnIt's external sweep will be triggered by the 125VDC to the input coil. operate time is that which elapses' froni energiza' tion of input to . closing of~""' 4 contacts. . Switching time 'shall'Ee same within I '2 millisecamosa - 4.3 Hi Pot' (Dielectric Strength) with the units stablized 1 at normal atmospheric conditions a 2200V, 60 Hz, voltage shall b.e applied for a period of 1 minute to l
- 1. Inputs (tie'd ,together) to ' Barrier a~nd outputs
~ ' (tied together) . .
f g
~~
~~L ggtggg yogurher) to Barrier. and Inputs
' There shall be no insulation treakdown from the appli-l cation of these. voltages.
4.4 Surge withstand capability. Apply the test generator output (per ANSI C37.90a 1974) to the input and output of the isolation device in both the energized and de- ) - energized conditions for 2 seconds minimum. ! See Fig. 5 for application points. Witen on, the device will not turn off for more than 1 l ms. When off, the device will not turn on for more than 1 as. . Fast Transient Test. The output of the circuit shown .l Fig. 1 shall be applied with each polarity to the
- inpu d output of the isolating device in both 4 energize n(t de-energized condition for 3 sec. ,
l see Fig. 5 fo'f4p lication points. ,
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l
' When on, the device sha t turn off for more than l i
! 1 ms. When off, the device shall not t for more than l l
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S.D.P.2332-A TITLE:SEE TITLE PAGE DATE: ; 8/3/79 4.6 Destructive Fault Test. See Fig. 6. To input (with 142VDC at output with 30 ma load) . l
'r
- I 3
j. t . 1, Apply S24vAC, 2000 amps. ' (Destructive to Input) 2J Apply 524VAC, between input and
- barrier.
1
.- 3. El Pot as in 4.3 .
To output (with 132VDC at input)
- 1. Apply 5247AC, 2 x 30ma current
[, 2. [ Apply 5247AC, 2000 amps
- _ (Destructive to Output)
- 3. Apply '52WAC, between output and
- barrier. -
- 4. Apply 1327DC, 500 amp.
- (Destructive to Output)
- 5. Apply 132TDC, between input and i
barrier.
. 6. El Pot as in 4.3.
See Fig. 6 After each of the above, there shall be no damage
, to the unfaulted side. The D'Arsonval type ammeter (21 accuracy shown in Fig. 6 shall not indicate a current increase of over 5% of max. normal. Units must not breakdown during Hi Pot test.
4.7 Radiation. The units will be exposed to 1 X 105 rads. This is to be done at outside facility. Procedure in Appendix I. (~lk
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1 TITLE:SEE TITLE PAGE DATE: S. D. R # 332-A a t, r,o 4.8 seismic. Units will be tested per Appendix II at an outside facility. 4.9 Aging. _ Accelerated thermal aging is acceptable per IEEE323. We have chosen the commonly used princialm- t
- that thermal aging effects are doubled by a 10*C ' increase in temperature. The materials used have greater than .73 electron volt activation energy Invuls.
As such the 10*C rule is applied very conservatively. Refer to Arrhenius plot attached. Fig. 2 -and Fig. 2A. Based on a max. ambient of 120*F (use 50*C) and choosing 106*C as test temp. we read from the plot. 10 years - 75 days ] 40 years - 300 days - i (Note that since the 120*F above is not continuously present in the application, a considerable margin is added.) i
] The contact load shall be 30mm at 142VDC and cycled at; rate of 1 sec. on, 36 sec. off.
Units will be checked for transfer throughout aging.on a schedule of every Mon., Wed. and Fri.. The input will be energized at 125VDC and output checked with indicator lamps. 4.10 Humidity. Units will be subjected to Humidity Method-106D of MIL-STD-202E for 10 continuous cycles, each as shown per Fig. 3. , l
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g i . l \y,P' i S. D. P. # 33 2 TITLE:SEE TITLE PAGE DATE: May 18. 1979
, Appendix I Radiation ,
1.0 Test Items 15 units'Struthers-Dunn, Inc. #cx3916 Isolators
, 2.0 Test 2 All 15 units will be sent to an outside facility.
The units will be'placed in the appropriate radiatgonfacilityandexposedtoatotaldoseof 1 x 10 rads of gamma radiagion. The dose rate will be between 3 to 5 x 10 - rads /. hour.
^ ' - '
.. 3.0 Test Report A compl'ete test report will include a detailed description of equipment and procedures.
Certification will also be provided by the facility. , R. ( .
f 17. g33 . N O7 INC.LODEb < Ho.s. \. S. D. R # 332 -A TITLE:SEE TITLE PAGE DATE: -*^h
.M 8/31/79 Appendix II - Rev.1 .
[. . seismic Testing ' V. 1.0 Test Items .'J! 12 Pieces CX3916 Isolators ' U: All 12 units will be sent.to an outside facility and - f subjected to the seismic vibration testing specified'in ',Q
. 3.0 and then returned to struthers-Dunn. At a later ?d, date, 9 of the units will be, returned, re-submitted to *
, d'-
the seismic testing and again returned to struthers- '- Dunn. Finally, 3 of the units will be returned and ., re-submitted CGain to the seismic vibration testing . completiefg the test program. .
,],', ,
. 2.0 Test Requirements The purpose of this test is to subject the isolators ,
I specified in section 1.0 to the seismic vibration *~- test specified in section 3.0 to determine their . l .5 ' ability to withstand such vibration without evidence - l 'of mechanical damage, deterioration, contact chatter *
,. in excess of one - (1) millisecond or loss of the 3,...
devices ability to operate properly during and after ,
., the vibration.
3.0 Test Procedures (In accordance with IEEE344 1975 and . IEEE501-1978) '
.l y.
3.1 Test Mountina -
..[f.
. The isolators will be mounted in a 11 gauge steel ;, i panel with three screws and nuts. They will be grouped .
3 to each 4" x 12" panel and mounted to a test fixture
. securely attached to the biaxial table of the AETc 45' seismic Test facility. The use of the 45' biaxial table results in equal' horizontal and vertical ,'*
components. . s'
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S. D. P. = 332-A TITLE:SEE TITLE PAGE DATE: J 8/31/79 3.2 Test Monitorinct The isolators will have their output contacts monitored 7
' for chatter in excess of 1 millisecgnd by means of MIL STD202D Method 310 (10-100usec - 21) One control ,....
accelerometer will be mounted on the test table. Based . on the test fixture being resonant free (1st resonance ,.. above 35 HZ) a second accelerometer will be mounted on -
*A.
, a sample unit for output response. . y
~ ::
3.3 Multiple Frecuency Test A biaxical mult2ple frequency excitation will be applied V to the isolators under test for a period of 30 seconds. 1-The level of periodic psuedo - random excitation will -
' ~ be such that the test response spectrum (TRS) from the "
control ' accelerometer will envelope the required response :4
, spectra (RRS).
Four tests will be run. First, with the inputs in phase; second, with one input 180* out of phase; third, with the equipment rotated 90* horizontally and with inputs - O in phase; and finally, with the same equipment T 4
. orientation as in the third step, but with one input . .
180* out of phasd. ; The level of the first five inputs in each biaxical
'~
direction will be such that the TRS from the control ' accelerometer computed at the Q=10 (St damping) will envelope the CBE RRS shown in Fig. A. The level of ~ the sixth input in each biaxial direction will be such that the TRS computed at Q=10 (St damping) will . E .- envelope the SSE RRS shown in Fig. A. - The isolators under test will be subjected to three ',"j. 4 ' different conditions below while the multiple frequency , excitation described above is applied: - Non-operating (input off) :, Operating-Transition (125VDC at input) ?' i
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'A Tj S. D.R #332-A TITLE:SEE TITLE PAGE DATE: .J.+) .
[J m R /3 *1/7 9 3.3 Multiple Frequency Test Con'd. A sine sweep test will be conducted using the biaxial .- input. Resonances will be determined for each axis. A 0.2g sine sweep at a rate of 2 octaves per minute
$M:
will be conducted over the frequency range of 1-35 HZ. ?l, The triaxial accehzometer output from sample unit will -
. be recorded on a Honeywell Visicorder. This output l.i: '"
will he compared to the Shaker control accelerometer, . .j also recorded on a visicorder. An amplification of 2:1 1/ will be considered a resonance. At each " resonance" G' a 20 second dwell test will be conducted. The test -- level will be 0.5g. ,
- ~-
The leveris required by Stone & Webster 2BVS-739 spec. , A. of 1/2 SSE of 0.2g horizontal, 0.15g vertical, and SSE of 0.4g horizontal, 0.32g vertical are floor inputs. . A minimum amplification factor of 5 will be applied par the following: .
.h1 .
Reference Fig. A.. . g The SSE will be run at 6g ZPA and the OBE at 3g ZPA. , .,- If a failure occurs at this OBE level, input will be - lowered to level- A(2g ZPA) for both SSE and OBE tests. .
.. If failure occurs at the SSE level, the input will be 6 lowered to level B (4.5g ZPA) . 'If a failure. occurs at level B, the SSE will be lowered to the OBE level of : -
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Q, - y , Numidity (Method 106D, MIL-STD-202E) The test samples shall be mounted in mid-air by means ) of twine and positioned so that one does not contact . l the other and both receive the same degree of humidity., )
- Distilled water,. having a pH value between 6.0 and '
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< CHARGE l DATE . U REQ. Struthers-Dunn PERFORaED -
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I-None l 06-08-81 l BY Pitman, New Jersey BY Paul Wells- Q l T Qualification Tests TEST SHEET # , PAGE _T - - of CXM16 Tsolat or TITLE 'l op f
- 1. PURPOSE OF TEST To determine if the Struthers-Dunn Is'olator Model #CI3916 enn 1 withstand the application of a surge wave of the type specified -
in ANSI C37.90a-1974/IEEE Std. 472-1974 Standard, and operate without malfunction during and after the application of the EEC waveform. .
- 2. EQUIPMENT USED
- U.U.T. (2 units with 3 isolators each). .-
- S.W.C. wave generator. Constructed per Figure 1 of ANSI C37.90a-1974 Standard, page 8. ~
H.V. probe. Tektronix Model iP6015 S/N 062622. Oscilloscope. Tektronix 475A Oscilloscope, Model'DM44.
~
- Oscilloscope probe. Tektronix iP6105 Ilo.
- Power Supplies. One Kepco Model SM-325 LAM, S/N C63656, one designed by Struthers-Dunn Systems Lab.
- Digital voltmeter. Data Precision 3400 S/N 1628. .
3 TEST SET-UP -
~
.- :.+- - The test was configured as shown in Figure 1 and open circuit 3.W.C.
' waveform was adjusted and calibrated to be as in Figure 2 (1NBE frequency, 3KV amplitude of first excursion decaying to about 1 5 kY in 6 psec.). ;
- 4. TESTS PERFORMED Each isolator was tested'as follows: ,
A. S.W.C. applied to points A and B, S1 closed. Monitor. load for - contact drop off. 3 applications of 2 sec. duration each. B. S.W.C. applied to points A and B, S1 open. Monitor load for contact closure. 3 applications of 2 sec. duration each. .- C. S.W.C. applied to points C and D, S1' closed. Monitor load for-contact drop off. 3 applications of 2 sec. each. .
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R FERFORItED tv: CHARGE. DATE . lj 06-08-81 l BY Pitman, New Jersey l REQ.Strutners-Dunn lBY Paul Wells M' Vone a TEST ISHEET # .
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%en0 JECT Qualification Tests ' TITLE 2nd SWC Test 2 fp i {
TITLE of CX3916 l -l _ i Monitor load cor . D. S.W.C. applied to points C and D, S1 open.3 applications of 2 sec. duratio - contact closure. - Before starting the tests the coil resistance and contact resistance of each isolator was measured and the operational status of emLeh After the tests the coil resistance and ; isolator was checked. contact resistance of each isolator was again measured
' isolator again checked for correct operation. .
for results. .
. ~
1 5 RESULTS AND CONCLUSIONS . l All of the six isolators tested met the requirements of the tests --
- J performed without , temporary or permanent malfunction. . .
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Based on' the above' re'sults,1 1 't is concluded that the isolator, model
#CX3916 manufactured by Struthers-Dunn, Pitman, New Jersey meets the l specifications of the guide for surge withstand 472-1974 capabilities document. tests as ,
l l
. set forth in the* ANSI C37 90a-1974/IEEE Std. ,
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Test'three Struthers-Dunn CX3916 Isolators at 267D Amp (ce 3dglber). Wuolts, 60 Hz, A@E and 500 Amp or higher,132 VDC to verify that a L.4 fa t:he input dues not affect [ the output, and a burnout in the output does not affect 22am izqtse. . .-
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REFERENCES:
a .- .., 1t DSGMSUTioN Report ..;.. PR-8036 I/T 2 and 3 dated 1-17 80 and 9-24-80 ' e.'-
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O ANALYSIS COMPARING CX-3918NE AND CX-3916NE A detailed analysis of the CX-3916NE and CX-3918NE Reed Relay Isolator shows that the only difference is the fact that the CX-3918NE has two miniature reed switches wired in series in order to achieve a dielectric breakdown capability (across' the output terminals) of 1,500 VAC. l The materials used in both units are'the same. The method of construction for both units is essentially the same. Although the CX-3918NE uses two reed switches wired in series, ' their environmental characteristics are the same as the one , dhitch used by the CX-3916NE.
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