ML20044G016
| ML20044G016 | |
| Person / Time | |
|---|---|
| Issue date: | 04/28/1993 |
| From: | Aggarwal S NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| To: | Merritt G VALIDYNE ENGINEERING SALES CORP. |
| References | |
| NUDOCS 9306010325 | |
| Download: ML20044G016 (3) | |
Text
L
- ....R 2 81993 sy Mr. Gerald Merritt, President Validyne, Inc.
r 8626 Wilbur Avenue Northridge, CA 91324
Dear Mr. Merritt:
Enclosed for your information is a copy of TR-2158-5/92, Rev.1, "A Test Plan for Fault Testing of Nuclear Power Plant Electronic Isolation Devices," dated March 3, 1993 (Enclosure 1).
Brookhaven National Laboratory, under contract from NRC, has recently completed testing of a representative sample of isolation devices, including Validyne Model CM-249, used in nuclear power plants. The tests were performed in accordance with the Test Plan, TR-2158-5/92, Rev. 1.
Enclosed for your review and comment is a copy of the test results summary for Model CM-249 (Enclosure 2). Consideration will be given to your comments if received by May 28, 1993. The final NUREG/CR report will be issued in July 1993.
Sincerely, 3ritidd M 4 satish K. AESP!Cl Satish K. Aggarwal, Program Manager Electrical and Mechanical Engineering Branch Office of Nuclear Regulatory Research
Enclosure:
As stated cc:
R. Swire J. Taylor, BNL (w/o encl)
QlSTRIBUTION:
L. Shao (w/o encl)
J. Craig i /o encl)
M. Vagins (w/o encl)
J. Wermiel (w/ enc 1 2)
R. Baer (w/ encl 2)
_J. Vora (w/o encl)
PDR (w/ encl 12)
Concurrence:
EMEB:RES SAggarwal:fr 04g/93 0FFICIAL RECORD COPY FILENAME: g:\\ groups \\de\\emeb\\aggarwa1\\augenstein Dk ogg25 j28 a}b m
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.y gg ISOIATION DEVICE TEST PROGRAM FIN L2158 TEST RESULTS
SUMMARY
DEVICE:
Validyne CM-249
?
TYPE:
Transformer Modulation with Voltage Input TEST RUN:
VA-3-1 (1)
DATE COMPLETED: 03/03/93 DEVICE CHAR ACTERISTICS Barrier Resistance - > 1.05 Gohm Barrier Capacitance - Range 0.7-5.1 pfarads Functional Test - Device failed at 0.1 MCF (10 volts)
Energy Passed - s 0.014 Joules (Damage 'Ihreshold = 100 Joules)
Summary CM-249 remote carrier module used with CD-173 carrier demodulator and MC-170 AD remote multiplexer / module case.
Device was tested at maximum credible fault levels from 0-110 volts at 10% steps.
Device failed functionally (would not transmit signal) at 10 volts.
Device maintained its isolation characteristics throughout testing. Greatest energy passed was 0.014 microjoules, well below the damage threshold value of 100 microjoules.
Barrier resistance was measured directly as either greater than 1.05 Gohm or some panicular value less than 1.05 Gohm at all step levels. All measurements were > 1.05 Gohms.
1.
ISOLATION DEVICETESTPROGRAM FIN.L2158 MAKE: Validync MODEL: CM-249 i
S/N: 55440 TESTRUN: VA 3-1(1) DATE: 3/3/93 Funct 1/2 Cycle BARRIER.
Test Energy TEST RESISTANCE BARRIER CAPACITANCE Passed
. Run MCF R > 1.05 Fregncy Voltage Voltage open ckt DUTconn.
iso barrier No. Lvl Gohm Appt'd open ekt acts DUT ma ma pfarads P/F microjoules (1) 0.1
> LOS 50000 2.95 2.95 0.55 0.55 3.5 P
0.014 (2) 0.2
>1.05
. 50000 2.95 2.95 0.55 0.55 1.9 F
9.6E-05 F
4.0E-05 (3) 0.3 50000 (4) 0.4
>1.05 50000 2.95 2.95 0.55 0.55 3.5 F
5.4E-05 (5) 0.5
>1.05 50000 2.95 2.95 0.55 0.55 1.9 F
6.0E-05 L(6) 0.6
>1.05 50000 2.%
2.97 0.55 0.55 2.4 F
2.6E-05 (7) 0.7
>1.05 50000 2.%
2.% - ' O.55 0.56 2.1 F
8.0E-05 (8) 0.8
>1.05 50000 2.96 2.%
0.55 0.56 4.2 -
F 3.5E-05 (9) 0.9
>1.05 50000 2.%
2.96 -
0.55 0.55 2.4 F
6.4E-06 (10) 1.0
>1.05
- 50000,
'2.96 2.96 0.55 0.56 5.1 F
2.8E-04 (11) 1.1
>1.uS 50000 2.%
2.96
- 0.55
'O.55 2.1 F
1.2E-04 (12)
>1.05
.50000 2.99 3.00
- 0.56 0.56 0.7 F
Notes:
CM 249 remote carrier module used with CD 173 carrier demodulator energy I
. and MC-170 AD remote multiplexcr/ module case.
damage = 100 Gross barrier resistance measured at all MCF levels.
level LDevice failed functional test after being exposed to 0.1 MCF.
J No measurements taken at 0.3 MCF.
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