ML20151B918

Test Procedure for Environ Qualification Testing of Coaxial Instrument Cables (RG 58) for New Hampshire Yankee

ML20151B918
Person / Time
Site:	Seabrook
Issue date:	05/25/1988
From:	Drain B, Whittles K INTERNATIONAL TELEPHONE & TELEGRAPH CORP.
To:
Shared Package
ML20151B911	List: ML20151B908 ML20151B918
References
24843-89N, NUDOCS 8807210157
Download: ML20151B918 (26)

Text

V g ATTACHMENT 1 TO NYN-88095 Test Procedure No. 24843-89N Page Nos.

TEST PROCEDURE FOR ENVIRONMENTAL QUALIFICATION TESTING OF COAKIAL INSTRUMENT CABLES (RG 58) l FOR  !

NEW HAMPSHIRE YANKEE A DIVISION OF PUBLIC SERVICE P.O. BOX 300 SEABROOK, NH 038;'4 Purchase Order No. 61917 l

Prepared by: M 4r [ M Date My /f 4p I Brian J.' Drain, NEQ Project Engineer "

NTS/Acton 533 Main Street, Acton, MA 01720 Reviewed and Approved by: *

• th Date [.2.i+88 Keith G. Whittles,' Engineering Manager NTS/Acton KT/ PRO /2484309N.NHY 8807210157 800712 PDR ADOCK 05000443 P PNU

]

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TABLE OF CONTENTS SECTION PAGE NO 1.0 PURPOSE 1-1

2.0 REFERENCES

2-1 3.0 TEST ITEM DESCRIPTION 3-1 4.0 TEST SEQUENCE 4-1 5.0 BASELINE FUNCTIONAL 5-1 6.0 THERMAL AGING 6-1 7.0 POST-THERMAL FUNCTIONAL 7-1 8.0 RADIATION EXPOSURE 8-1 9.0 POST-IRRADIATION FUNCTIONAL 9-1 10.0 LOCA SIMULATION 10-1 11.0 POST-LOCA FUNCTIONAL 11-1 APPENDIX A - REPRESENTATIVE TEST EQUIPMENT LIST A-1 Procedure No. 24843-89N Page No. 1

1.0 PURPOSE The purpose of this document is to describe the procedures which shall be followed during environmental qualification testing of ten (10) ITT Surprenant RG 58 Coaxial Cables supplied by New Hampshire Yankee. Section 3.0 of this procedure provides specific identification of the subject test specimens.

The intent of the test program is to evaluate the performance and durability of the coaxial cables during and following exposure to postulated in-service and end-of-life accident environment simulations. Qualificction acceptability of the cables will be dependent on their ability to withstand the specified environmental simulations witnout loss of physical integrity or degradation performance capability.

As detailed herein, the cable qualification program shall be conducted in accordance with the guidelines of IEEE Std. Nos.

323-1974 and 383-1974. Per the stipulation of New Hampshire Yankee, the vertical flame test described within Section 2.5 of IEEE 383-1974 will not be conducted for any test specimen.

The subject program shall be conducted in accordance with the provisions of NTS/Acton's Quality Assurance Manual. This fact shall ensure compliance with all pertinent provisions of 10CFR, Part 21, 10CFR, Part 50, 49 and 10CFR, Part 50, Appendix B.

Procedure No. 24843-89N Page No. 1-1 L

i 2.0 REFERENCE REGULATIONS AND DOCUMENTS 2.1 New Hampshire Yankee Purchase Order No. 61917.

2.2 IEEC383-1974 Institute of Electrical and Electronics Engineers, Standard for Type Test of Class IE Electric Cables, Field Splices, and Connections for Nuclear Power Generating Stations.

2.3 IEEE323-1974 Institute of Electrical and Electronics Engineers, Standard for Qualifying Class I Electric Equipment for Nuclear Power Generating Stations.

2.4 10CFR50 Appendix B - Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants (1973).

2.5 10CFR21 -

Reporting of Defects and Noncompliances (1977).

2.6 10CFR50.49 -

Environmental Qualification of Electric Equipment Important to Safety for Nuclear Power Plants.

2.7 NEP 160 - Environmental Qualification (EQ) Program.

Procedure No. 24843-89N Page No. 2-2

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3.0 TEST ITEM DESCRIPTION j Four (4) Coaxial Implementation Cables shall be subjected to the environmental and performance tests described in this procedure.

Each cable shall be inspected upon its receipt at NTS/Acton to document the pre-test condition of each test item. If the condition is determined to be acceptable, each item shall be tagged with a unique identification nunber. This number will remain unchanged throughout the test program.

The test specimens sh-11 consist of Cable Type: Coaxial Manufacturer: ITT Surprenant Cable Code: TA6Y Cable Color: Black w/ Red Tracer Sample Length: Fifty (50) feet No. of Samples: Ten (10)

The test samples will be numbered one through ten and will be uivided into test groups as follows:

Group No. Aged Unaged DBE Exposure 1 1, 2 7, 8 30-day LOCA Simulation 2 3, 4 9, 10 Limited DBE Test (Optional) 3 5, 6 N/A Limited DBE Test (Spares)

Initially, only the Group 1 test specimens will be subjected to the test sequence described in Section 4.0 of this document. i i

The remaining test items will be reserved for any additional '

testing which might be deemed to be required by New Hampshire Yankee. -

Procedure No. 24843-89N )

Page No. 3-1 1 .

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4.0 TEST ITEM SEQUENCE Following receipt and inspection, the cables shall be subjected to environmental and performance testing in the following sequence:

1) Baseline Functional

2) Thermal Aging

3) Post Thermal Aging Functional

4) Irradiation

5) Post-Irrad ationi

6) Cable Preparation and LOCA Setup

7) LOCA Simulation

8) Post-LOCA Functional I

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l Procedure No. 24843-89N Page No. 4-1

5.0 BASELINE FUNCTIONAL Subsequent to receipt and inspection at NTS/Acton, the cables shall be subjected to Baseline Functional Testing. The results of these tests shall be used as a benchmark for comparison to the results of similar tests at critical points in the test program. This process shall provide a means of monitoring cable performance che.racteristics in order to id6ntify and qualify any test item deficiency or verify qualification acceptability.

5.1 Continuity Check Using an ohmmeter, each conductor and shield of each cable shall be checked for continuity. Results shall be recorded on test data sheets.

Acceptance Criteria The measured values (a total of twency) shall be recorded on a test data sheet and subsequently forwarded to New Hampshire Yankee for their evaluation and approval.

5.2 Insulation Resistance The cables shall be wrapped around mandrels having a diameter of approximately twenty times the cable diameter.

A minimum cable length of ten feet shall contact the manirel surface. Insulation resistance measurements shall be made between the center conductor and the shield, and between the shield and the mandrel. The insulation resistance test Procedure No. 24843-89N Page No. 5-1 l - /

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5.0 BASELINE FUNCTIONAL (continued) 5.2 Insulation Resistance (continued) shall be performed by applying a 500 Vdc potential to one conductor for a minimum of one minute. After the one minute energization, the insulation resistance shall be measured using an I.R. Bridge and the results shall be recorded on data sheets.

i Acceptance Criteria The measured insulation resistance shall be acceptable if it is greater than one megohm. The data shall be transmitted to New Hampshire Yankee for evaluation.

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l Procedure No. 24843-89N Page No. 5-2

6.0 THERMAL AGING Subsequent to the Baseline Functional Test, the cables shall be subjected to thermal aging. Tne cables shall be placed in a forced hot air aging charloer as attached to the mandrels. Only the test cables and spares (six cables total) shall be in the aging oven during the aging process.

Aging temperature shall be monitored and recorded a minimum of twice daily.

Thermal aging duration is based on the following information:

Service Temperature = 1300F (54.40C)

Weak-Link Material = Cross-linked Polyethylene Activation Energy = =1.29eV (1500C)

Aging Temperature = 3020F (specifled by NHY)

Aging Time = 168 hours0.00194 days <br />0.0467 hours <br />2.777778e-4 weeks <br />6.3924e-5 months <br /> (specified by NHY)

Qualified Life = 40 years The previously listed aging time and temperature was specified by New Hampshire Yankee, based on existing qualification data provided by the manufacturer for the identical cable insulation and jacketing materials. The 1.29eV activation energy was derived by use of the Arrhenius equation and the previously listed times and temperatures. .

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i Procedure No. 24843-89N Page No. 6-1 l

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7.0 POST THERMAL AGING FUNCTIONAL A New ' Hampshire Yankee representative may be present at NTS/Acton to witness the post-thermal aging functional and packaging prior to radiation exposure. Following completion of thermal aging testing, the test cables shall be subjected to identical functional tests as those specified for baseline functional testing, except that the cables and mandrels shall be submerged in tap water for a minimum of one hour prior to the insulation resistance test.

l Procedure No. 24843-89N Page No. 7-1

8.0 RADIATION Subsequent to the post-thermal aging functionals, the test samples will be packaged in two cardboard- boxes . They will be placed carefully in paper insulation to protect the samples during shipping and handling. .The box containing the test samples will be shipped to Isomedix's radiation facility in Whippany, New Jersey and tested in the sealed box.

At Isomedix, the specimens will be exposed to a Cobalt-60 gamma field at a dose rate not to exceed 1.0 x 106 rads per hour providing a T.I.D. of 2 x 108 rads +10% (2.2 x 108 rads).

Halfway through the exposure, the specimens will be rotated 180 degrees to insure a more uniform dose.

Dosimetry will be performed using Harwell Red Perspex dosimeters, utilizing a Bausch and Lomb Model 70 Spectrophoto-meter as the readout instrument, or an equivalent dosimetry system. This system wnich is calibrated directly with Atomic Energy of Canada, Limited (AECL) is traceable to NBS. A copy of the correlation report will be available upon request.

Irradiation will be conducted at ambient temperature and pressure for the Isomedix facility.

I Procedure No. 24843-89N l Page No. 8-1

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9.0 POST-IRRADIATION FUNCTIONAL Subsequent to completion of the gamma irradiation exposure, the test specimens will be subjected to the identical functional tests as those specified for baseline functional testing, except that the cables and mandrels shall be submerged in tap water for a minimum of one hour. prior to the insulation resistance test.

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Procedure No. 24843-89N Page No. 9-1 1

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10.0 LOCA SIMULATION l

The following test will be performed to simulate the l postulated LOCA at the end of the cable service life.

10.1 Calibration Run Prior to performing the LOCA test, a calibration run will be performed to demonstrate system capability. The calibration run will be performed to the transient conditions. New Hampshire Yankee representative may be present to witness the calibration run, if desired.

10.2 Test Fixturing The four cable test specimens, each approximately ten feet in length, will be wrapped around a steel mandrel whose outside diameter is approximately twenty (20) times that of each test item. Each test item will be secured to its mandrel via Sager TY25M Tyraps.

The fixtured test units will then be placed onto a horizontal metal base inside NTS/Acton Test Autoclave No. 1.

The cable ends will be trimmed to permit electrical measurements from outside the test autoclave. The cable specimens will be of sufficient length to a low each specimen to be brought through a sealed autoclave penetration without need for any special connection within the autoclave.

Procedure No. 24843-89N Page No. 10-1

4 10.0 LOCA SIMULATION (continued) 10.3 Test Condition Monttoring NTS/Acton will use three (3) Type "J" thermocouples to monitor the LOCA simulation test. One thermocouple (TI) will be placed approximately 2" from the steam outlet, one thermocouple (T2) will be placed one inch off the test fixturo on the left hand side near the steam outlet, and one thermocouple (T3) will be placed on the right he:nd side furthest from the steam outlet approximately one inch off the test fixture.

Autoclave pressure will be monitored using a calibrated pressure transducer.

The environmental test conditions will be monitored during the LOCA simulation using a Gould Strip Chart Recording System (or equivalent instrument).

10.4 Test Item Loading Each test cable conductor will be energized with an AC potential of 600V at a test current of 1.0 amperes per conductor. The cable shields, mandrel and test vessel will be at ground potential. The test circuit will be designed such that the applied potential will be interrupted if the leaking / changing current exceeds approximately 1.0A. l l

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I Procedure No. 24843-89N Page No. 10-2

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10.0 LOCA SIMULATION (continued) 10.5 Test Item Monitoriqq The test items will be energized as detailed in Section 10.4 during the LOCA simulation with the following exception:

The circuit will be de-energized to perform I.R.

measurements as detailed in Section 5.0 of this procedure at the following test intervals:

1) After interconnection of the test specimens and placement of the sample sets on the base fixture.

2) At the peak temperature test temperature (390oF),

as time permits.

3) Once per day during LOCA. If the IR reading monitored drops below 1 megohm, the recovery of the IR reading to megohm will be determined as a function of temperature by more frequent monitoring of readings within this period.

4) After LOCA, at ambient conditione, while still fixtured in the autoclave.

Due to the duration required for I.R. measurements, they will be initiated at the peak temperature but will continue for the next thirty (30) minutes of the test )

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Circuit- voltage and current will be monitored continuously during the 30-day LOCA test.

If failure occurs during the LOCA test, the failed test sample (s) will be identified utilizing the insulation resistance measurements described in this section of this procedure. Subsequent to isolating the failed sample (s), it Procedure No. 2,4843-89N Page No. 10-3

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.- s 10.0 LOCA SIMULATION (continued) 10.5 Test Item Monitoring (continued) will be jumpered out and the test circuit reenergized. This action would be a contingency plan allowing NTS/Acton to address failure if failure occurs. New Hampshire Yankee will be notified as soon as possible if failure occurs.

10.6 Chemical spray The test cables will be subjected to a chemical-spray exposure based on the profile specified.

Fresh chemical spray will be used for a minimum of one (1) hour at each dwell at 3460F(1740C); thereafter, the spray solution will be recirculated from the pool of solution collected in the bottom of the vessel. The chemical spray will consist of 3000 ppm boron as boric acid, 0.064 molar sodium thiosulfate, and sufficient sodium hydroxide to obtain a pH of 10.5 at room temperature. The spray shall be applied at a total flow rate of 0.63 gal / min, which is calculated to provide a spray intensity of )

l approximately 0.15 (gal / min)/ft 2 over the cylindrical area of the mandrels.

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l Procedure No. 24843-89N Page No. 10-4 J

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I 10.0 LOCA SIMULATION (continued) 10.7 LOCA Simulation The LOCA Simulation will consist of injecting saturated steam into the autoclave to achieve the temperature / pressure profile. Due to the length of the fixture, and autoclave volume, Acton anticipates varying temperatures internal to the autoclave during transient .9nditions Therefore, thermocouple placement has been designed to demonstrate a general test condition envelope. Subsequent to achieving the transient condition the chemical condensate will submerge NTS/Acton's immersion heater and saturated conditions will be maintained by the immersion heater. At the conclusion of the LOCA test, at ambient conditions, photographs will be taken of the test samples.

Procedure No. 24843-89N Page No. 10-6

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• 11.0 POST LOCA FUNCTIONALS Subsequent to LOCA testing, the test specimens will be visually inspected for signs of damage. Next, the samples will be subjected to the baseline functional tests.

Acceptance Criteria The results of the post-LOCA functional tests will be forwarded to New Hampshire Yankee for their review and evaluation.

Voltage Withstand Test The cables will be straightened and then re-wrapped around mandrels having a diameter of approximately forty times the cable diameter. The cables and mandrels will be immersed in tap water and subjected to a voltage withstand test for five (5) minutes at a potential of 80 Vac/ mil. The leakage current shall be measured after five (5) minutes of energization.

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Procedure No. 24843-89N Page No. 11-1

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APPENDIX A - REPRESENTATIVE TEST EQUIPMENT LIST The following equipment is a representative of the test equipment to be used during this test program. Acton may use substitutions for test equipment, but the replacement equipment will have accuracies equal to or better than those listed in this Appendix, and as all calibrated test monitoring equipment used in this project have certification traceable to the NBS. 1 1

Procedure No. 24843-89N Page No. A-1

SAMPLE .

TEST EQUIPMENT LIST Report No. 24843-89N Page A-2 NAME MFR. MODEL SER.NO. RANGE ACCURACY INV.# CAL DUE High Temper- Blue M Pom 336C-1 P14-2351 Ambient to +325*C +5*C CH366 sture Chamber Electric Stopwatch Micronta 63-5010 None 0 to 10 hrs. .5 FM325 1/100 sec. resolution sec./ day Stopwatch Micronta 63-5009A None g 0 to.59 min. 59 sec. .5 Ft026 1/100'sec. resolution sec./ day

, Digital Fluke 8050A 2646172 10 mV to 750 VAC True rms DC+.03%R ML503 Multimeter 0 to 20 MQ Res., dB Voltage +2 digits Digital Fluke 8050A 2876259 10 microvolts to 1000 VDC DC +0.03% ML546 Multimeter 10 millivolts to 750 VAC +2 iTigits 0 to 20 Mn resistance Current Shunt G.E. ,0-50 Amp N/A 50 amps - 50 millivolts +1% ML550 AC/DC Hi Pot Hipo- HD125 9870-01 AC to 10 kV Meters .PA517 tronics DC to 25 kV 2%

Variac Superior 1256-20-B 2870 Priority Voltage: 240/120 34 N/A PA519 Electric 50/60 Hz input 0 to 280 volts, 28 amp output DC Amplifier Honey- 117 0100135- 4 Channel Gain: .01 to 10 +2%

PE405-well G68 Digital Pressure Jay 3502-08 10306 0 to 150 psi +1.0 psi PI402 Indicator Digital Pressure Jay 3502-08 10307 0 to 350 psi +1.0 pst PI403 Indicator Digital Pressure Jay 3502-08 10308 0 to 150 psi PI404 Indicator

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SAMPLE TEST EQUIPMENT LIST Test Report # 24843-.89N Page A-3 ,

NAME MFR. MODEL SER.NO. RANGE ACCURACY INV.# CAL DUE Pressure Gauge U.S. 0-160 N/A 0 to 160 psi +1.0 psi PI406 Gauge Flow Gauge Fisher 10A1755 8103A100 0.2 to 1.9 gpm +3%

PI416

& Porter 4A1 Pressure C .J . CJDL-4010 191A. O to 150 psi -+2% PI443 Transducer Enter-

.i prises Pressure Viatran 218-28 173475 0 to 200 psig Static PI449 Transducer Error Band

<+.4% span Visicorder Honey- 906C 9-9334 DC to 2 KHz 12 channel -+1 dB RE311 well 6" paper Data Logger Solar- 35300 100378 DC 0 to 100V, O to 100mA See RE388 tron AC 0 to 20V, O to 200mA Mfr.

Resistance 0 to 10K Manual Digital Temper- Omega 199 19843 -245 to +1999'F -+1*F TI326 ature Indicator Digital Temper- Omega 199 19862 -245 to +1999*F -+1*F TI334 .

ature Indicator Digital Temper- Omega 199 43242 -178*F to 1400*F Type "J" .+1.5*F TI352 ature Indicator Mercury ERTC0 ASTMIIC 6796 0 to 400*C -

+2*C TI362 Thermometer I

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SAMPLE TEST EQUIPMENT LIST Test Report # 24843-89N Page A-4 . '

NAME MFR. MODEL SER.NO. RANGE ACCURACY INV.# CAL DUE Dual Thermocouple Omega Type J N/A -300 to 1600*F +2.2*C or TP319 Probe (LOCA) 10.75%

Thermocouple Omega Type J None -300 to 1600*F +2.2*F or TP338 Probe (L)

t0.75%

g, whichever

• is greater Thermocouple Omega Type J None -300*F to +1600*F +2.2*F or TP339 Probe (L) 10.75%

whichever is greater Dual Thermor.ouple Omega Type J None -300 to 1630*F +2.2*F or TP340 Probe (L) 10.75%

whichever is greater Thermocouple Omega Type J None -300 to 1600*F +2.2*F or TP341 Probe +0.75%-

whichever is greater

.. Megohmeter General 1862C 2477 0.5 megohms to 2M megohms +3% to ZB327 Radio 100/500 volts 112%. .

Megohm Bridge General 1644A 1041 1K ohm to 1000 tera ohm +1% to ZB332 Radio 110 %

Calibration Abbreviation '

U.W.C.E. - Use With Calibrated Equipment

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• - ATTACHMENT 2 TO NYN-88095 National Acton Division Technical 533 Main Street Systems Acton, MA 01720 617/263 2933 July 5, 1988 New Hamsphire Yankee A Division of Public Service of New Hampshire Route 1, Lafayette Road General Office Building Seabrook Station Seabrook, NH 03874 Attention: Richard Bergeron Joseph Vargas

Reference:

Environmental Qualification Testing of RG58 Coaxial Instrument Cables, NTS/Acton Job No.

24843-89N Gentlemen:

The purpose of this letter is to provide a summary of the Qualification Test Program for RG58 Cable samples for New Hampshire Yankee. A comprehensive report shall be submitted in addition to this letter. The agreed submittal due date is July 8, 1988.

Ten cable samples were submitted to NTS/Acton for qualification testing in accordance with IEEE 383-1974, and a previously conducted test program documented in Franklin Research Test Report No. F-A5550-8. The ten samples were designated as follows:

Group One: Two aged samples and two unaged samples Group Two: Two aged samples and two unaged samples Group Three: Two aged spares One group of two aged and two unaged samples was subjected to the following tests:

Receiving Inspection & Baseline Functional Test Thermal Aging Post-thermal Functional Test Irradiation Post-Irradiation Functional Test 15-Day LOCA Test Post-LOCA Functional Test

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New llampshire' Yankee July 5, 1988 R. Bergeron/J. Vargas Page 2 of 3 The other group of two aged and two unaged samples was subjected to a 30-day LOCA test instead of the 15-Day LOCA test. Testing on this group is not discussed in this letter as testing is still in progress.

Receivino/ Inspection and Baseline Functional Tes_t:

Each cable sample was logged in and labeled with a unique identification number. The identification numbers for this sample group are:

1, 2 Aged Samples 7, 8 Unaged Samples The samples were then subjected to continuity checks and insulation resistance measurements. The results are on the attached data sheets.

Thermal Aoina Two of the samples (1, 2) were placed in a temperature chamber at 3020F for 168 hours0.00194 days <br />0.0467 hours <br />2.777778e-4 weeks <br />6.3924e-5 months <br />, simulating a 40-year service life.

I P_qst-Thermal Aoinu Functional Test:

The samples were again subjected to continuity checks and l Insulation resistance measurements.

l Irradiation:

Two of the smaples ( 1, 2) were subjected to gamma radiation exposure at Isomedix, New Jersey. The radiation dose was specified as 220 megarads at a rate not to exceed one magarad per hour.

Post-Irradiation Functional Test:

The samples were subjected to continuity checks and insulation resistance measurements.

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Dx New Hampshire Yankee July 5, 1988 R. Bergeron/J. Vargas Page 3'of 3 1_5-Day LOCA Test:

The samples were placed in the NTS/Acton System One LOCA chamber and subjected to a margin transient (with chemical spray) followed by a 15-day LOCA exposure as required by NTS/Acton Test Procedure No. 24843-89N and the Franklin Reasearch Report previously noted. During LOCA testing, daily insulation resistance measurements were recorded. The sample carried one amp continuously throughout the LOCA tese.

Post-LOCA Functional Test:

Following the 15-day LOCA exposure, each sample was subjected to insulation resistance measurements and a voltage withstand test at 3200 VAC.

Results:

All results were acceptable. Some embrittlement of the outer jacket material was observed during the test program, however, the cable samples carried a continuous one amp load during LOCA and withstood the 3200 VAC Hipot Test. All results are included in the attached data sheets.

Conclusions:

The RG58 cable is acceptable for use under environmental and accident conditions specified in NTS/Acton Test Procedure No.

24843-89N.

If you should have any questions concerning the test program, please do not hesitate to contact me.

Sincerely, NTS Acton  !

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Keith G. Whittles l Engineering Manager l l

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