ML20211G022
| ML20211G022 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 06/13/1986 |
| From: | Hukill H GENERAL PUBLIC UTILITIES CORP. |
| To: | Stolz J Office of Nuclear Reactor Regulation |
| References | |
| 5211-86-2107, NUDOCS 8606190251 | |
| Download: ML20211G022 (6) | |
Text
O GPU Nuclear Corporation Nuclear
- eme:reo o
s Middletown, Pennsyhania 17o57 0191 717 944 7621 TELEX 84 2386 Writer's Direct Dial Number:
June 13, 1986 5211-86-2107 Office of Nuclear Reactor Regulation Attn:
J. F. Stolz, Director PWR Projects Directorate No. 6 U.S. Nuclear Regulatory Commission Washington, DC 20555
Dear Mr. Stolz:
Three Mile Island Nuclear Station Unit 1 (TMI-1)
Operating License No. DPR-50 Docket No. 50-289 Safety Parameter Display System Isolation Device Test Procedure and Test Results In Reference 1, GPU Nuclear Corporation (GPUN) addressed each of the concerns raised by NRC in their Safety Evaluation Report for the Three Mile Island Unit 1 Safety Parameter Display System (Reference 2).
GPUN included discussion of test criteria for isolation devices, and identified that the test procedure and test results for the Rochester Instrument Model SC-1302, which is used to buffer RC pump power from the computer, would be forwarded to NRC upon our l
receipt from the manufacturer.
I The NRC had requested in t'e Safety Evaluation Report that GPUN provide a test i
procedure and test results u verify that the maximum credible fault was applied to the output of the Model SC-1302 in the transverse mode (between signal and return) and that no perturbations were seen on the Class 1E input.
Rochester Instrument Systems (RIS) has completed retesting of the Model SC-1302-323. This testing was performed specifically because of NRC interest in isolation capability relative to a high voltage applied transversely across the output terminals of the device.
The final RIS test report has not been released; however, GPUN has obtained from RIS the test procedure and test resul ts. We have a&ised RIS of our intent to release these documents.
Excerpts from these documents showing the test procedure and configuration, and the results of the output fault testing, are attached.
An RIS SCl302-323 unit was tested with 600 VAC applied to the output side (versus the GPUN requirements for 120 VAC).
No change was observed on the input side.
.008 8606190251 060613 PDR ADOCK 05000289 P
PDR h
I l
l GPU Nuclear Corporation is a subsidiary of the General Public Utilities Corporation
5211-86-2107 By copy of this letter, GPUN considers that we have addressed all NRC Staff concerns relative to the TMI-1 SPDS.
Si ncerely, il D.
u ill Vice President and Director, TMI-1 HDH/SK/pa(3506f)
References:
(1)
GPUN letter 5211-86-2064, H. D. Hukill to J. F. Stolz, "TMI-1 Safety Parameter Display System - Response to NRC Concerns", April 25, 1986 (2) USNRC Letter, John F. Stolz to Henry D. Hukill, "TMI-1 Safety Parameter Display System",
December 23, 1985 l
o 1
TEST PROCEDURE SC-1302-323 IS01.ATOR - TAUI.T TESTING EQUI?FNT A) 4 X SC-1202-323 Test Units 3) 4-20mAde Source C) 250 Ohm f. cad D) 24Vdc Power Supply E) 120V/600 Volt Transformer (200VA rating)
F) 250Vdc Source G) 2 X DC Volt =eter (analog) 2 X Ogograph hwa g,,#g-M 1
H) i Note: Type Manufacture Serial N aber and dst Calibration Data for records.
SE*-UP i
ne au-1302-323 Isolator will be set up as if in a working loop config-uration with the 4-20mAdc source connected to input terminals. 24Vdc Power Supply to Power Terminals and 250 Ohm load across Cucput Terminals as shown in TIC.1 t
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PRIMARY TESTS 1)
Set up as [13 1 A) Input: Open-circuited
- 1) Output change to be recorded with meter and scope connected across 250 ohn load.
ii) Power Supply disturbance to be recorded with seter and scope connected across power terminal. Linics to be achieved: power supply voltage sust retain within the safe working range 247de, :202.
4
- 3) Input: Short-Circuited a)
Terminal 1 to Chassis Ground b)
Terminal 2 to Chassis Ground c)
Taminal 1 to Terming,J. 2.
i&ii) Output and Power Supply changes to be recorded as in ' A',
for each test.
C) 250Vde: Applied to Input Terminals a)
Terminal 1 to voltage supply, remining lead of voltage supply to chassis ground.
b)
Terminal 2 to voltage supply, remaining lead of voltage supply to chassis ground.
c)
Terminal 1 to voltage supply. Tecninal 2 to re=aining lead of voltage supply.
1&li) Output and Power Supply changes to be recorded as in ' A' test. plus notes of how unit failed to be recorded.
for ac.
AdL.
D) 600V E App ued to Input Terminals a)
Terminal 1 to voltage supply, remaining lead of voltage supply to chassis ground.
t b)
Terminal 2 to voltage supply, re=aining lead of voltage I
supply to chassis ground.
c)
Terminal 1 to voltage supply. Tarsinal 2 to remaining lead of voltage supply.
NOTE: As C and D are destructive tests, separate unit will be used for each test. A & 3 to be recorded for each unit.
SECONDARY TESTS
".3 2)
Set up as Fig. 1 I
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'k A) Output: Open-Circuited 7,,. ' i
- 1) Input change to be recorded with seter and scope across input terminals.
- 11) Power Supply change to be recorded with nacer and scope across power cer= nals.
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l SECONDARY TESTS (cont'd)
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5)
Output: Short-Circuited a) Terminal 5 to chassis ground b) Terminal 6 to chassis ground c) Terminal 5 to Terminal 6 C) 250Vde: Applied to Output Terminals a) Terminal 5 to voltage supply, remaining lead of voltage supply to chassis ground b) Terminal 6 to voltage supply, re=aining lead of voltage supply to chassis ground c) Terminal 3 to voltage supply. Terminal 6 to re=aining lead o voltage supply.
A(
,i D) 600tsd: Applied to Cucput Terminals a) Ter=inal 5 to voltage supply, re=aining lead of voltage supply to chassis ground b) Terminal 6 to voltage supply, remaining lead of voltage supply to chassis ground c) Ter=inal 5 to voltage supply. Ter=inal 6 to re=aining lead of voltage supply.
NOTE:
Again. C and D are destructive tests, so separate units will be used for each test and A and 3 recorded for each.
Please note, these tests will only indicate typical results of failure.
We cannot guarantee every unit will fail in the same sanner.
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Para 2 ef 3 Secendary Tar.tn I
Test Procedure Raf.: SC-1302-323-1 Isolator-Fault Testing Schematic Raf. (s):D-1039-754 (SC-1302-323)
C.H. Tomlinson,4/11/86,Rev.1 8-1041-060 (I-323 P/S) 2.C. 250vde: Applied to Output Terminals 2.D. 600vac: Applied to Output Terminals
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