ML18079A782

Qualification Tests of Electrical Cables in Simulated LOCA Environ, Prepared by Franklin Research Ctr for American Insulated Wire Corp

ML18079A782
Person / Time
Site:	Salem
Issue date:	04/30/1979
From:	FRANKLIN INSTITUTE
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Shared Package
ML18079A783	List: ML18079A782 ML19242C457
References
F-C5115, NUDOCS 7908100447
Download: ML18079A782 (40)

Text

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Qualification-Tests . "_ . *. . .

of. .

Electrical Cables'ln*a: Simulated Loss-of-Coolant-Accident {LOCA) Environment FRC Final Report F-C5115

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-prepazoed fore American Insulated Wire Corporation Pawtucket, Rhode Island

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. :_April" 1979 - *- -

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Qualification Tests of Electrical Cables in a Simulated Loss-of-Coolant-Accident (LOCA) Environment FRC Final Report F-CSll 5 prepar>ed for American Insulated Wire Corporation Pawtucket, Rhode Island April 1979

~nklin Research Center A Division of The Franklin Institute The Benjamin Franklin Parkway, Phila., Pa. 19103 (215) 448-1000

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J F-C5115 CONTENTS Seation Title Page 1

SUMMARY

OF SALIENT FACTS. 1-1 2 IDENTIFICATION OF EQUIPMENT TESTED 2-1 3 DESCRIPTION OF TEST FACILITY. 3-1 4 TEST SEQUENCE AND PROCEDURES. 4-1 4.1 Pretest Preparation and Insulation Resistance Measurements 4-1 4.2 Gamma Irradiation 4-1 4.3 Preparations for Steam/Chemical-Spray Exposure

• 4-1

4. 4 Steam/Chemical-Spray Exposure 4-2 4.5 Final Tests. 4-3 4.6 Failure Criterion 4-3 4.7 Discussion of Steam/Chemical-Spray Exposure Profile. 4-3 5 TEST RESULTS. 5-1 5.1 Initial Inspection and Insulation Resistance Measurements 5-1 5.2 Gamma Irradiation 5-1

5. 3 Ste~m/Chemical-Spray Exposure 5-2 5.4 Final Inspection and Bend/High-Potential-Withstand Tests 5-3 6 CERTIFICATION 6-1 APPENDIX A LIST OF DATA ACQUISITION INSTRUMENTS APPENDIX B ACCELERATION OF POST-LOCA SIMULATION APPENDIX C CERTIFICATION OF IRRADIATION iii

F-C5115 FIGURES Nwnher TitZe Page 1 Salient Features of Steam/Chemical-Spray Test Vessel. 3-3 2 View of Test Vessel and Auxiliary Apparatus

• 3-4 3 Pre-S/C Exposure View of Cables on Stainless-Steel Mandrel

• 3-5 4 Schematic of Electrical Energizing Circuits

• 3-6 5 Specified Temperature/Pressure Profile for Steam/

Chemical-Spray Exposure

• 4-4 I i

6 View of Arrangement for High-Potential-Withstand Test 4-5 7 Post-Test View of Cables on Stainless-Steel Mandrel

• 5-8 TABLES Nwnher TitZe Page 1 Identification of Test Specimens. 2-2 I

I 2 Summary of Insulation Resistance Measurements 5-4 1 I!

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F-C5115

1.

SUMMARY

OF SALIENT FACTS FRC Project Number: C5115 Test Program Conducted for:

American Insulated Wire Corporation (AIW)

Central Avenue and Freeman Street Pawtucket, RI 02862 Test Program Conducted and Reported by:

Franklin Research Center 20th & The Parkway Philadelphia, PA 19103 Dates of Test Program:

January through April 1979 Objective of Test Program:

To demonstrate performance of electrical cables for Class lE service in a nuclear power generating station in accordance with appropriate test guidelines presented in IEEE Standards 323-1974* and 383-1974,t and speci-fications provided by the client.

• IEEE Std 323-1974, "IEEE Standard for Qualifying Class IE Equipment.for Nuclear Power Generating Stations," The Institute of Electrical and Electronics Engineers, Inc., New York, NY, 1974.

tIEEE Std 383-1974, "IEEE Standard for Type Test of Class IE Electric Cables, Field Splices, and Connections for Nuclear Power Generating Stations," The Institute of Electrical and Electronics Engineers, Inc.,

New York, NY, 1974.

1-1

F-C5115

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Equipment Tested:

Six specimens of 2/C #16 AWG and six specimens of 2/C #14 AWG elec-trical cable insulated with ethylene propylene rubber (EPR) and jacketed with Hypalon over the insulated conductors and over tapes, fillers and shields.

Elements of Test Program:

s A thermal aging program was performed by the client in which the T specimens were divided into two groups of six cables each. One group was aged for 168 hours0.00194 days <br />0.0467 hours <br />2.777778e-4 weeks <br />6.3924e-5 months <br /> (7 days) at 121°C (250°F) and the other group remained unaged. All specimens were then subjected to an air-equivalent dose of 206 Mrad from a cobalt-60 source and subsequently to a steam/

chemical-spray (S/C) exposure designed to simulate a loss-of-coolant-accident (LOCA) environment. The S/C exposure included an initial peak temperature/pressure of 306°F (152°C)/84 psig (579 kPa) at 4 seconds of elapsed time (ET) followed by a 2.8-hour dwell at 286°F (141°C)/40 psig (276 kPa),

• a 21. 2-hour dwell at 219°F (104 °C) /-3 psig (21 kPa), and a final dwell at 209°F (98°C)/O psig (O kPa) for a total S/C exposure of 83 days. A chemical spray consisting of 1.2% boric acid (pH = 8.5 to 10.0) was applied for the first 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the S/C exposure. The #16 and #14 AWG cables were electrically energized with 10 Vac/l A and 230 Vac/10 A, respectively, during the S/C exposure.t Following the S/C exposure, the cables were subjected to a mandrel-bend test at -40 times the cable diameter and to a high-potential-withstand test at 80 Vac per mil of insulation while immersed in tap water.

SuITTTiary of Test Results:

The specimens remained energized for the duration of the 83-day S/C exposure, during which the minimum measured insulation resistance for any specimen was 5 Mn at 500 Vdc. The cables withstood final bend/high-potential-wi~hstand tests.

• Temperature/pressure excursions between a maximum of 312°F (156°C)/85 psig (586 kPa) and a minimum of 25.0°F (121°C)/32 psig (221 kPa) were experienced in the time interval of 5 to 22 seconds ET before conditions were stabilized at 286°F (141°C)/40 psig (276 kPa).

tPotentials listed were applied between conductors. Potentials were 5 +/-

1.4 Vac and 115 +/- 5 Vac, respectively, between the conductors and the ground plane (i.e., the test vessel).

1-2

F-C5115 ec-ted d

2. IDENTIFICATION OF EQUIPMENT TESTED Descriptions of the cable specimens provided by the client and the specimens' required energizing potentials and currents are presented in Table 1. The length of each cable was approximately 30 ft.

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p/C any psig ier.ced bilizt:d 2-1

f' Table l. Identification of Test Specimens Cable Thennal Electrical Number Cable Description (a) Aging (b) Energizing (c)

C5115-l 2/C #16 AWG 7 x 0.0192-in Tinned Copper Conductor Unaged 10 Vac/l A C5115-2 0.025-in Ethylene Propylene Rubber (EPR) Insulation (OD= 0.108 in)

C5115-3 0.015-in HypalQn Jacket Over Insulation (OD= 0.138 in) 0.0015-in Aluminum/Mylar Shield C5115-4 .One #18 AWG 7 x 0.0152-in Tinned Copper Drain Wire 168 hours0.00194 days <br />0.0467 hours <br />2.777778e-4 weeks <br />6.3924e-5 months <br /> lO Vac/l A at 12l°C C5115-5 Flame Barrier Tape(s) (250°F)

C5ll5-6 0.001-in Mylar Separator 0.060-in Overall Hypalon Jacket (OD = 0.435 in)

C5115-7 2/C #14 AWG 7 x 0.0242-in Tinned Copper Conductor Un aged 230 Vac/10 A N C5115-8 0.03-in EPR Insulation (OD= 0.133 in)

I N C5115-9 0.018-in Hypalon Jacket Over Insulation (OD= 0.169 in}

Neoprene Fillers C5115-l0 0.001-in Mylar Separator 168 hours0.00194 days <br />0.0467 hours <br />2.777778e-4 weeks <br />6.3924e-5 months <br /> 230 Vac/10 A at 121°C C5115- ll Flame Barrier Tape(s} (250°F}

C5115-l2 0.005-in Corrugated, Bronze Shield (helically wrapped around conductor assembly}

0.06-in Overall Hypalon Jacket (OD = 0.6 in}

Notes: (a} Cable descriptions and nominal dimensions were provided by the client. Actual FRC measurements ""Tl of cable dimensions may be somewhat different. The nominal dimensions were used when calculating n I -

test voltages and bend~test mandrel diameters. U1 (b) The specimens were thermally aged by the client. U1

{c) The electrical potentials were provided between conductors. The potentials between the conduc-tors and the ground (vessel} plane were soi of the listed potentials (i.e ** the potentials of cables 1 through 6 and cables 7 through 12 were 5 i 1.4 Vac and 115

• 5 Vac above the ground plane. respectively.

F-C5115

3. DESCRIPTION OF TEST FACILITY The primary test facility used in the test program consisted of a 24-in (0.61-m)-diam by 48-in (1.2-m)-long stainless-steel vessel with a carbon-steel head, as shown in Figures 1 and 2. The test specimens were assembled on two concentric, stainless-steel test mandrels (see Figure 3), which measured 16 and 20 in (0.41 and 0.51 m) in diameter by 33 in (0.84 m). in length. The test mandrels were supported by the vessel head.

Steam was admitted to the test vessel through a central 1-1/2-in NPT perforated section of pipe, which extended approximately 6 in (0.15 m) into the test vessel (see Figure 1). The perforated pipe was surrounded by a concentric section of a 6-in (0.15-m)-diam pipe designed to baffle the incoming steam, ~hus preventing direct impinge-ment onto the cables.

An array of eight centrally-located spray nozzles* consisting of two nozzle blocks with 4 nozzles each was provided as shown in Figure 1 such that the cables were sprayed with chemical solution at an average rate of at least 0.15 gpm/ft 2 [(O.l t/s)/m2 ]; this rate was based on a total solution flow rate of 2.2 gpm (0.14 t/s) divided by the area of an imagi::ia.ry cylinder located midway between the inner and outer Cl; mandrels. Provision was made to collect the spray solution in the*

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c. bottom of the vessel and to recirculate the solution back through the spray nozzles.

The vessel was equipped with several thermocouples to measure and record the temperatures of the gas in the vicinity of the cables and of the fluids which collected in the bottom of the vessel. The vessel

• Nozzle No. G2.8W, Spraying Systems Company, Wheaton, IL.

3-1

F-CSl 15

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pressure was indicated on a dial gage and recorded on a strip chart.

A list of data acquisition instruments used in the test program is !I provided as Appendix A.

Electrical apparatus was prepared to supply potentials and currents to the test specimens as described in Table 1 and Figure 4.

The circuits included current-limiting breakers for disconnecting the applied potentials if the leakage/charging current exceeded approx-imately 1.0 A.

3-2

F-C5115 I

r SPRAY SOLUTION INLET STEAM INLET CYLINDRICAL PERFORATED PIPE STEAM BAFFLE FOR STEAM INLET VESSEL HEAD 111\..o~~- EXTERNAL STRIP HEATER THERMAL INSULATION

~~-TEST CABLES SUPPORTED ON INNER a ----4~<'1 MANDRELS OUTER MANDRELS LIQUID LEVEL SIGHT GLASS SOLUTION S ~~44--..c

• CONDENSATE OVERFLOW TUBE SOLUTION

~;:::::;:;:;;-"'"] .....__.. ..__.......__ __,,__ _ RETURN FOR PUMP Figure 1. Salient Features of Steam/Chemical-Spray Test Vessel 3-3

F-C5115 Figure 2. View Of Test Vessel and Auxiliary APParatus 3-4

5 F-CSllS i-i Figure 3. Pre-S/C Exposure View of Cables on Stainless-Steel Mandrel 3-5

CURRENT TRANSFORMERS (2 PLACES)

AMMETER llOVoc POTENTIAL TRANSFORMERS NO.I CONDUCTORS OF TEST CABLES L CONDUCTIVE SHIELDS OF TEST CABLES 1

LEAKAGE /CHARGING NO. 2 CONDUCTORS CURRENT AMMETER OF TEST CABLES I

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<.n (Voe) (Voe) (Voe) ( A) (A) <.n 10 10 Figure 4. Schematic of Electrical Energizing Circuits

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4. TEST SEQUENCE AND PROCEDURES The test program was designed to simulate a loss-of-coolant accident (LOCA) and the cooldown period following the accident. The program in-cluded thermal aging (conducted by the client), gamma irradiation, an 83-day steam/chemical-spray (S/C) exposure, and final bend/high-potential-withstand tests

• u C"l c::

.,.. 4. l PRETEST PREPARATION AND INSULATION RESISTANCE MEASUREMENTS N

C"l l-Three turns of each cable were wrapped around the outer, 20-in QJ i LU c:: (0.41-m)-diam (#14 AWG cables) and the inner, 16-in (0.51-m)-diam (#16 I,.... AWG cables) portions of the stainless-steel mandrel set (see Figure 3).

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l-The cable turns were supported on the mandrels by 0.5-in (13-mm)-diam

.µ I U QJ ceramic bushings and loosely tied in place using fiberglass sleeving.

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The mandrel set wrapped with cables was immersed in a tank of tap 0

u water at room temperature for a minimum of 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />. The insulation

.µ re resistance (IR) of the cables was then measured at 500 Vdc held for 1

~ minute between each cable conductor and the other conductor connected

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to the cable sheath and a bare copper rod placed in a tank of tap water.

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QJ l-4.2 GA~ IRRADIATION

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.,.. The cables on the mandrel set were exposed to an air-equivalent dose of 206 Mrad of .gamma radiation from a cobalt-60 source at an average dose rate of 0.66 Mrad/hour.

4.3 PREPARATIONS FOR STEAM/CHEMICAL-SPRAY EXPOSURE The cable ends were routed between the inner and outer mandrels and up through the vessel head. The cable ends were pressure sealed in the vessel head with epoxy-potting compound.

4-1

F-C5115 The mandrel set with cables was installed into the test vessel, and the 'cable ends were connected to electrical circuits (see Section 3) through terminal strips, extension cables and knife switches.

4.4 STEAM/CHEMICAL-SPRAY EXPOSURE The cables were electrically energized (see Section 3) and then subjected to a steam/chemical-spray (S/C) exposure in accordance with the specified temperature/pressure profile shown in Figure 5 (see Section 4.7). After 5 minutes of elapsed time (ET),* a chemical spray (see Section 3) was applied which consisted of 2100 ppm boron as boric acidt buffered with sodium hydroxide to a pH of 10.0 at room temperature.

After approximately 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> ET, a pool of spray solution and con-densed steam was allowed to accumulate in the bottom of the vessel; the solution was subsequently recirculated through the spray nozzles. The chemical spray was terminated after 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> ET, and the pool of solution was left in the bottom of the vessel. The pH of the solution was measured at least. twice per week during the ~/C exposure; when the measured pH dropped below 8.5,. the pool of liquid was replaced with fresh solution.

The IR of the cables was measured before initiation of the S/C exposure, during the dwell at 286°F (141°C)/40 psig (276 kPa) starting at 1.0 hour0 days <br />0 hours <br />0 weeks <br />0 months <br /> ET, at 219°F (104°C)/3 psig (21 kPa), at 208°F (98°C)/O psig (0 kPa), once per week thereafter, and after the 83-day S/C exposure while the vessel was flooded with water.~ The m~asurements included the IR of the extension cables used to connect the specimens to the electrical energizing circuits.

• An elapsed time clock was started upon initiation of the S/C exposure.

t 2100 ppm boron is equivalent* to a 1..2% (by weight) boric acid. solution.

~The vessel was flooded with water for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> prior to IR measurements.

4-2

F-CSllS 4.5 FINAL TESTS After the S/C exposure, the cables were severed from the vessel head and removed from the test mandrel set. The specimens were straightened and then wound with six turns around bend-test mandrels with diameters 40 times those of the outside cable diameters (see Section 5.4 for actual mandrel diameters). The cables were visually inspected for defects, tears and cracks in the insulation. The coiled cables were then immersed in tap water at room temperature for a minimum of 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and subjected to a high-potential-withstand test at 80 Vac per mil (3150 Vac per mm) of insulation. The #16 AWG cable with 25 mil (0.64 mm) of EPR insulation was tested at 2000 Vac, and the #14 AWG cable with 30 mil (0.76 mm) of insulation was tested at 2400 Vac. At the end of 5 minutes, the leakage/

charging current was measured. The potential was applied to one conductor with the other conductor connected to the ground connection and a bare copper rod immersed in tap water. More than one specimen was tested d

simultaneously to reduce the time required for the test. A view of post-test arrangements is shown in Figure 6.

4.6 FAILURE CRITERION The test cables were to be checked for failure during the S/C exposure if the leakage/charging current across the insulation of all cables under test exceeded 1.0 A. Insulation resistance measurements were to be used to identify any test cables responsible for the high leakage/charging current, and these specimens were to be disconnected before the remaining test cables were re-energized.

4.7 DISCUSSION OF STEAM/CHEMICAL-SPRAY EXPOSURE PROFILE The client's original test specification required a final dwell at 152°F (66.7°C) for the balance of a one-year exposure. This was subsequently reduced to 89 days at 204°F (95.5°C) in accordance with a temperature/time compression analysis conducted by the client and FRC (see Appendix B), and further reduced to 209°F (98.3°C) for 82 days (83 days was the actual total exposure) for reasons of test convenience

• (i.e., the temperature of 209°F was easier to maintain than 204°F).

4-3

~--- CHEMICAL SPRAY----tM * *Chemical spray starting at 5 minutes of elapsed time (ET) and continuing until at least 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> ET. Spray solution recirculated starting at 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> ET.

286°F(l41°C)/40psig (276kPo)

LEGEND 150 300

@ INSULATION RESISTANCE u u..

D D TOLERANCES w I.LI TEMPERATURE=!. 5°F (3°C)

~ 125 0::

250 PRESSURE AS REQUIRED TO

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MAINTAIN TEMPERATURE 0:: 0::

219°F(l04°Cl/

w I.LI * .... 3psig(21kPo)

a. a. 209°F(98°C)/Opsig (0 kPo)

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75 150 PREHEAT 130TO140°F 50 (54 TO 60°C)

"Tl 100 83.0 I 0 10 2.8 3.3 24.5 25.5 ("')

s h h h h d 01 ELAPSED TIME (ET) 01

, Figure 5. Spedfied Temperature/Pressure Profile for Steam/Chemical-Spray Exposure

Figure 5 . Specified Temperature/Pressure Profile for Steam/Chemica 1-Spray Exposure

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U1 U1 Figure 6. View of Arrangement for High-Potential-Withstand Test

F-CSllS

5. TEST RESULTS 5.1 INITIAL INSPECTION AND INSULATION RESISTANCE MEASUREMENTS The results of insulation resistance (IR) measurements obtained upon receipt of the cables are presented in Table 2. An initial inspection revealed that the six aged specimens (see Table 1) were apparently in the same good condition as the six unaged specimens. However, the color of the flame barrier tapes in aged specimens 10, 11 and 12 was beige rather than white as in unaged specimens 7, 8 and 9.

It was also noted that specimens 4, 5, 6 and 11 had oily deposits on the outermost jacket and slight indentations in the jacket caused by the cord which held the specimens in coils during transit from the client to FRC.

In addition, specimen 8 had a cut. through the jacket about 3-1/2 ft from one end of the cable which extended almost completely around the circumference of the cable. Therefore, this section of the cable was not included in the test vessel for the S/C exposure.

5.2 GAMMA IRRADIATION After receiving 206 Mrad of gamma irradiation from a cobalt-60 source, all cables were found to be flexible; no visible damage was observed except some impressions where the fiberglass sleeving held the cables in position on the mandrel. A certification of irradiation is provided as Appendix C.

The results of post-irradiation IR measurements are presented in Table 2.

5-1

F-C5115 5.3 STEAM/CHEMICAL-SPRAY EXPOSURE The steam/chemical-spray (S/C) exposure was provided in accordance with the specified temperature/pressure profile illustrated in Figure 5, with the following comments and deviations:

1) Maximum and minimum levels of temperatures and pressures occurred as follows during the initiation of the S/C exposure:

• 306°F (152°C)/84 psig (579 kPa) at -4 seconds ET

• 287°F (142°C)/56 psig (386 kPa) at -5 seconds ET

• 310°F (154°C)/86 psig (593 kPa) at -7 seconds ET

• 250°F (121°C)/32 psig (221 kPa) at -15 seconds ET

• 312°F (156°C)/85 psig (586 kPa) at -22 seconds ET

• 295°F (146°C)/60 psig (414 kPa) at -25 seconds ET

• 286°F (141°C)/40 psig (276 kPa) thereafter (within tolerance) for the remainder of the 2.8-hour dwell.

2) A temperature of approximately 225°F (107°C) was recorded for a 2-hour period on the eleventh day of the S/C exposure (209°F (98°C) was the specified temperature). This higher temperature was attributed. to an adjustment of electric strip heaters on the test vessel.

All 12 cable specimens maintained their energizing potentials and currents (see Table 1) for the duration of the 83-day S/C exposure, except when the circuit was de-energized to measure IR. The lowest measurement of IR for any specimen during the S/C exposure was 5 MQ at 500 Vdc. IR measurements are summarized in Table 2.

Based on measurements made during the S/C exposure, the pH of the chemical spray during the first 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> was 8.0 to 10.5. During the remaining portion of the exposure, the pH of the solution in the bottom of the vessel was maintained between 7.5 and 10.5, except on one occasion when the measured pH was 7.0. Continued dilution with steam condensate and chemical reactions with wetted surf aces slowly reduced the pH of the solution. The solution in the bottom of the vessel was replaced 12 times during the S/C exposure in order to restore the specified pH level.

A post-test view of the cables wrapped around the test vessel mandrel

• is provided as Figure 7.

5-2

F-C5115 5.4 FINAL INSPECTION AND BEND/HIGH-POTENTIAL-WITHSTAND TESTS Following the S/C exposure, the cables appeared to be in good condi-tion. The #16 AWG cables were limp, and the aged cables appeared to have more whitish chemical deposits on their jackets than the unaged cables.

The cables were subjected to a mandrel-bend test around sheet-metal mandrels with diameters of 17 in (0.43 m) for the #1~ AWG cables and 22 in (0.56 m) for the #14 AWG cables; the diameter ratios were 39 and 37, respectively.

While innnersed in tap water, the coiled cables withstood 2000 Vac (#16 AWG) and 2400 Vac (#14 AWG) for 5 minutes. The highest leakage/charging current observed during the high-potential-withstand tests was 3.2 mA.*

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• The leakage/charging current was the net result of one or two conductors rel (each from a separate cable) connected together during the application of 2000 or 2400.Vac (see Section 4.5).

5-3

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I, Table 2. Sunmary of Insulation Resistance Measurements (a,b)  !;

(All values are in ohms) I Cable and Conductor Nt.nber lleasurement Conditions 1 2 4 Test Progra* Temperature Pressure Ground Plane/

Phase ("F)/("C) (psig)/(kPa) Vessel Conditions 1 2 1 2 1 2 1 2 Pre-Irradiation 82/28 0/0 Tap water (c) 1.1 x 10 17 1.1 x 10 12 1.2 x 1012. 1.2 x 10 12 1.2 x 1012 1.2 ll 10 12 6.0 x 10** 5.2 ll 10 11 Post-Irradiation 80/27 0/0 Tap water (c) 1.4xl0 11 1.2 x 10 11 1.5 x 10 11 1.4 x !0 11 6.2 x 1010 1.3 x 10 11 9.0 X 10 1 D 9.5 x 10 10 Pre-5/C Exposure Room 0/0 llandrel and 5.2 X 10 1D 4.5 x 10 10 4.5 x 10 10 6.0 X 10 1 D 5.0 ll lOID 5.2 x 10 1 D 3.5 x 10 10 5.4 ll 10 1 0 (d) Ambient ambient air (e) 1.0 h of S/C 286/141 42/290 Chemical spray 3.5 x 10 7 4.0 x 10 7 3.0 x 10 7 4.0 x 107 3.0 x 10 7 3.5 x 10 7 5.5 x 106 6.0 x 106 Exposure (d) on l.11 20 h (0.8 d) or 219/104 4/'l8 C'-iical spray 2.0 x 10 6 2.0 x 10 8 1.9 x 108 1.9 x 108 1.9 ll 108 1.9 x 10 8 1.3 x 108 1.4 x 106 I S/C Exposure ( d) on

.p..

166 h (6.9 d) of 210/99 0/0 No spray. l.8 ll 10 8 4.5 x 108 4.0 x 108 4.0 x 10 8 3.5 x 10 8 4.0 ll 10 8 2.2 x 10 8 2.4 x 10 8 S/C Exposure (d) ll1S11id air and mandrel (f) 1993 h (83 d) of 212/100 0/0 No spray. 5.0 ll 10 8 5.9 x 108 5.3 x 108 5.7 x 108 4.5 x 108 5.2 ll 10 8 .t.9 x 108 3.0 x 10 8 S/C Exposure (d) llU1Uid air and mandrel (f)

Post-S/C -86/30 0/0 Vesse 1 flooded 2.6 ll 1010 2.0 x 10 10 2.2 x 10 10 2.6 ll 10 10 1.8 x 10 10 1.9 x 10 10 1.6 x 10 10 2.8 x 10 10 Exposure (d) with tap water (cl All notes are on page 5-7.

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E Summary of Insulation Resistance Measurements (a,b) (cont.) ,~

Table 2.

(All values are in ohms)  :*

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~

Cable and Conductor Number Measurenient Conditions 8 5 6 7 Test Program Temperature Pressure Ground Plane/ 1 2 2 1 2 e

("F)/( *c) (psig)/(kPa) Vessel Conditions 1 2 1 Phase 5.6 x 10 11 4.0 x 10 11 1.3x10 11 1.2 x 1012 1.1 x 1012 1.1 x 1012 1.2 x 10 12 Pre-Irradiation 82/28 0/0 Tap water (c) 5.0 x 1011 1.0 x 10 11 9.0 x 10 10 9.5 x 10 10 4.0 x 1011 4.0 x 10 11 4.0 x 1011 4.5 x 10 11 Post-Irradiation 80/27 0/0 Tap water (c) 1.0 x 1011 5.0 x 10 10 4.0 x 10 10 5.0 x 1010 5.0 x 1010 5.4 x lOIO 5.4 x 10 10 5.0 x 10 10 Pre-S/C Exposure Room 0/0 Mandrel and 4.5 x 101° (d) Ambient ambient air (e) 1.1 x 10 7 1.0 x 107 1.2 x 107 1.0 h of S/C 286/141 42/290 Chemica 1 spray 5.3 x 10 6 6.0 x 10 6 5.0 x 10 6 5.2 x 106 1.0 x 107 ~

Exposure (d) on 10 8 1.1 x 10 8 1.2 x 10 8 1.8 x 108 1.8 X 10 8 2.6 x 10 8 2.6 X 108 20 h (0.8 d) of 219/104 4/28 Chemical spray 1.2 x 108 1.3 x S/C Exposure (d) on 1.7 x 10 8 1.8 x 108 4.5 x 10 8 4.5 x 108 5.0 x 108 4.5 x 108 166 h (6.9 d) of 210/99 0/0 No spray. 2.2 x 10 8 2.3 x 108 VI Humid air and I S/C Exposure ( d)

VI mandrel (f) 2.lxJ0 8 2.4 x J0 8 5.0 J0 8 5.1 x 10 8 5.4 x J0 8 5.3 X J0 8 212/100 0/0 No spray. 3.0 x 10 8 3.5 x 10 8 X 1993 h (83 d) of S/C Exposure (d) Humid air and mandrel (f) 9.0 x 109 9.8 x 10 9 1.5 x 10 10 1.7 x J0 10 2.2 x J0 10 2.8 x 10 10 2.4 x 10 10 2.2 x lOID Post-S/C -86/30 0/0 Yes se 1 flooded Exposure (d) with tap water (c)

All notes are on page 5-7.

,,I n

U1 U1

Table 2. Surrmary of Insulation Resistance Measurements (a,b) (cont.)

(All values are in ohms)

Cable and Conductor Nl.lllher Measurement Conditions 9 10 11 12 Test Program Teqieratur*e Pressure Ground Plane/

Phase ("F)/("C) (psig)/(kPa) Vessel Conditions l 2 l 2 1 2 l 2 Pre-Irradiation 82/28 0/0 Tap water (c) 1.2 x 1012 1.1 x 10 12 7 .0 x 10 11 1.0 x 1012 7.0 x 10 11 7.1 x 1011 9.0 x 1011 1.0 x 101 2 Post-Irradiation 80/27 0/0 Tap water (c) 4.0 x 1011 4.5 x 10 11 4.0 x 1011 3.5 x 10 11 4.5 x 10 11 4.0 x 10 11 4.5 x 1011 4.5 x 1011 Pre-S/C Exposure Room 0/0 Handrel and 5.0 x 1010 5.4 x 1010 4.0x 10 10 5.2 x 1010 4.0 x 10 10 5.2 x 10 10 4.0 x 101° 5.8 x 10 10 (d) Ambient ambient air (e) 1.0 h of S/C 286/141 42/290 Chelllica l spray 1.0 x 107 1.1 x 101 8.4 x 10 6 7.8 x 10 6 8.2 x 10 6 7.6 x 106 7.0 x 10 6 7 .0 x 10 6 Exposure (d) on 20 h (0.8 d) of 219/104 4/28 Chemical spray 2.3 x 100 2.3 x 108 .9.8 x 10 7 8.8 x 107 9.6 x 107 8.5 x 10 7 8.2 x 10 7 7.9 x 10 7 S/C Exposure (d) on 166 h (6.9 d) of 210/99 0/0 No spray. 5.0 x 10 8 5.0 x 100 3.0 x 108 4.5 x 108 3.0 x 108 3.0 x 108 2.8 x 10 8 J.0 x 10 8 S/C Exposure (d) Humid air and mandrel (f) 1993 h (83 d) of 212/100 0/0 No spray. 5.5 x 108 5.5 x 108 5.8 x 100 5.8 x 108 5.8 x 10 8 5.8 x 10 8 4.5 x 10 8 5.0 x 108 S/C Exposure Humid air and mandrel (f)

Post-S/C -86/30 0/0 Vessel flooded 1.7 x 10 10 3.0 x 10 10 2.4 x 1010 2.0 x 10 10 1.4 x 10 10 1.6 x 10 10 1.8 x 1010 1.7 x 10 10 Exposure (d) with ta~ water (c

All notes are on page 5-7.

I n

01 01

eF-C5115 Table 2. Surrrnary of Insulation Resistance Measurements (a,b) (cont.)

(All values are in ohms)

Notes: (a) All IR measurements were made at 500 Vdc held for l minute.

Measurements were made between each conductor and the other conductor connected to the ground plane, which included the cable mandrel or a copper rod irrmersed in a tank of tap water, as appropriate.

(b) Additional IR measurements obtained during the S/C exposure and not included in this report were discussed with the client.

The resistances were similar to the values listed for 166 hours0.00192 days <br />0.0461 hours <br />2.744709e-4 weeks <br />6.3163e-5 months <br /> of the S/C exposure (i.e., between 10 7 and 10 9 n). All measure-ments are on file with the client.

(c) Specimens were irrmersed in tap water for a minimum of 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> prior to IR measurement.

(d) Measurements of IR include the effects of extension cables between the test specimens and the electrical energizing panels.

(e) Mandrel with cables was installed into the test vessel.

(f) Chemical spray terminated; vessel conditions maintained with steam and a pool of heated solution in the bottom of the vessel.

5-7

~~f~~~f.?~

I F-C5115 Figure 7. Post-Test View of Cables on Stainless-Steel Mandrel 5-8

~-C5115

6. CERTIFICATION The undersigned certify that this report is a true account of the tests conducted and the results obtained.

• .. G. C. Gambs, Jr.

Project Engineer

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• r~ .,/

'- ' ' LI::.- ¥-+<'l --==

1.

D. V. Paulson, Chief Environmental Testing

• ,:.i APPROVED:

M. M. Reddi, Vice President Carfagno, Engineering Performance Qua on 6-1

List of Data Acquisition Instruments Appendix A

GENERAL FRC PROCEDURE FOR CALIBRATION OF INSTRUMENTS TO MEASURE TEMPERATURE, ELECTRICAL CURRENT AND LIQUID FLOW RATE A List of Data Acquisition Instruments (hereafter called Instrument List) used to measure or record data obtained during this teSt program is appended. The following remarks are offered to assist the reader in understanding FRC practice for calibrating instruments to measure temperature, electrical current and liquid flow rate.

1. Temperature Measurement In general, environmental temperatures provided during oven exposures and simulated SLB/LOCA conditions (e.g., steam exposures) are sensed by thermocouples; their signals are displayed and recorded by strip chart recorders with appropriate electronic reference-junction compensation. FRC uses thermocouples and thermocouple wire purchased from vendors who comply with ANSI Standard MC96.1-1975, "Temperature Measurement by Thermocouples," for limits of error (e.g.,+/- 3/4% over 200° -to-700° F range for ANSI type T). FRC maintains its temperature recorders through a service contract with recorder suppliers who routinely clean, service and calibrate the recorders, traceable to NBS, a minimum of once avery four months. The reports of calibration are on file at FRC.

To further substantiate the validity of temperature measurements by thermocouples, FRC maintains special calibrated thermocouples (calibrated at 32°, 212° and 400°F) which are used according to the following procedure:

On the day a test is started, a calibrated thermocouple is substituted for one of the ANSl-standard~uality thermocouples at the specified oven or test vessel location. (The thermocouples are connected to the recorders with ANSI-standard thermocouple extension wires; Jones-type terminal strips are occasionally included with appropriate thermocouple-metal connecting links.) The cali-brated thermocouple is placed in a dewar bath of_stirred .ice-water for approxi-mately 30 s and then into an insulated flask of actively boiling water for approx-imately 30 s. If the recorder indicates the temperatures of freezing and boiling water within a tolerance of +/- 2° F, the temperature measuring/recording system is considered adequately calibrated for the purposes of the test program. The above system calibration procedure is repeated after completion of the oven aging or SLB/LOCA exposure.

2. Electrical Measurement All electrical measurements are made by instruments with calibrations traceable to NBS. Special circuits are frequently provided to supply current levels requiring power-current transformers. In these cases, instrument-current transformers are used in conjunction with 5-A movement ammeters to indicate the currents present in the test circuits. These panel-mounted ammeters are calibrated on a program-by-program basis against calibrated ammeters of higher quality.

A-1

-'i .*.

~;~~~~~f~*.~

3. Liquid Flow Rate Measurement FRC calibrates its liquid flowmetan according to the following procedure:

Th* flowmeter is installed in the FRC flow calibretlon station, which has pro-visions for adjusting and controlling the flow rate of tip w1tar through the flowmeter. The water is collected in a tank which re1ts on 1 beam t>.lance. After steady flow is established, the time for a predetermined mm of water to flow through the flowmeter is measured; time m111Urements ire made with en auto-

/ matic electric timer.

Most FRC flowmeters are of 1 concentric orifice-plete type (e.g., Daniel Flow Tube) with a differential-preuure manometer (e.g., Barton Dial Manometer). The orifice and manometer are cllibrated as a system, although the instruments are identified by separate FRC item numbers. Both the manometer and the orifice are listed in the Instrument List.

4. Strip Chart Recorders As noted in Section 1 above, strip chart recorders are serviced and calibrated a minimum of once ev11ry four months. Some recorders re1pond to voltage inputs other then thermocouple signals ind the amount of pen response can be controlled by adjustment of front-panel controls. For the11 recorders, pen-respon*

calibration Is obtained on a program-by-program basis for the specific parameters being recorded. For example, to record preuure the pressure trensducer ind the recorder are calibrated as a system by epplying known levels of pressure to the sensor ind then recording the amount of recorder pen response. After calibration, the recorder Input-amplifier controls rem1in unchanged, except for occuional minor zero-drift adjustments. The actual calibrations appear on the strip chart. The full-span c11ibration level (e.g., 0 to 200 psig full scale) is included among the data provided in the Instrument List.

A-2

LIST OF DATA ACQUISITION INSTRU~ENTS F*C5115 INSTRU~ENT NU~BER 18018 INSTR AND ~FH Sl~PSON VOLTMETE~

TYPE/MOD~L NUMBER 57 PANEL MOUNTED SERIA'L NlJllilHE~ NONE RA~GE/f"EATURES 0 TO 300 VAC ACCURACY 3.0 PCT. OF F.S.

DA'l'E C.ALIF\RATED 1*29*79 CALIBRATION DUE 7*29*79 INSTRU~ENT NUMBER 18079 HlSTR AND ~FR AMETEK, PRESSUR~ TRANS~ITT~P TYPE/~OD~L NU~B£~ 50*200*G*B/C SERIAL NU~BER 10523*1 RANGE/FEATU~ES 0*200 PSIG ACCUF{ACY o.2s PCT. OF F.s.

CATE CALIBRATED 7*25*78 WlTH 18187.

CALIBRATION DUE 7*25*79 INSTRU~ENT NU~S£R 1$183 INS'l'R AND MFR BARTON INSTRUM~NT, PRESSURE GAGE TYPE/MQD~L NU~BER STAINLESS STEEL SERIAL NUM8ER 227*19714 HANGE/FEATURES 0*100 IN. WATER 6000 PSIG STATIC ACCUkAC't o.s PERCENT OF ruLL SCALE OIFF PRESS DATE CALIB~ATED 11*6*78 wITH 18249 CALI8RATIOr- DUE 11*6*79 INS?RU~ENT NU~BER 18187 INSTR ANO "4F'R NORDEN KETAY, PRESSURE GAGE TYPE/MQO~L NUMBER ACRAGAGE AlSl J1b TUBE SERIAL NU~BER 1005 1-tANGE/fEATURES 0*200 PSIG 1 PSI/UIV ACCURACY 1.0 PERCENT OF rULL SCALE DATE CALIBRATED 7*25*78 CALIBRATION DUE 7*25*79 INSTFUMENT ~U~BER 18221 INSTR AfllO ~f'R ESTERLINE ANGUS SPEED SERVO 11 TYPE/MODEL NUMBER L1102S SERIAL PW"'BER 908001 RA~GE/FEATU~ES o.s MILLIVOLT

• 100 v.

ACCURACY o.2s PERCENT OF SPAN CATE CALIBRATED 1*22*79 s.o A r.s. BOT~ PENS CALIBRATIGt. DUE 5*22*79 INSTRUMENT ~UM8ER 18234 INSTP AND ~F'R ESTERLI~E A~GUS ~ULTlPOINT R~CORDE~

TYPE/MODEL ~U~BEP. E1124E SERIAL NU~BEH 941628 RANGE/FEATURES *24 POINTS 0

• 400 DEGREES F.

ACCURACY o.25 PERCENT or fULL SCALE DATE CALIERATF.D 1*22*79 0 TO .400 DEGREES F" F.S.

CALJBRATlON CUE 5*22*79 A-3

LIST OF DATA ACQUISITION I~STRUMENTS F'*CS 115

$;1~:~~:7

~~~~.~?.

~~:r~*;~:.; INSTRU~ENT NUMBER 18241

~~~'

1;*.;;.

~);.:_,;

INSTR AND MFR TYPE/fl!OOEL Nl1'18f.R HALLTIPLIER CURRENT TRANSDUCER CT*510 A2

'~~~tt_~~- SERIAL NUMBER NONE RANGE/FEATURJ:.:S 0*1 MILLIA,.P DC OtJTPUT 0*5 A AC INPUT ACCURACY o.s PCT. OF r.s.

DATE CALIBRATED 1*9*79 CALIBRATION DUE 7*9*79 INSTRUMENT NUMBER 18242 INSTR AND Mf'R HALLTlPLIER CURRENT TRANSDUCER TYPE/MOO~L NU~SER CT*510 A2 SERIAL NUMBER NONE f<AfliGE/fEATURES 0 TO 1 MILLIA~P DC OUTPUT 0 TO 5 A AC INPUT ACCURACY 0.5 PERCENT DATE CALIBHATED '1*9*79 CALIBRATION DUE 7*9*79 lNSTRU~ENT NU~BER 18249 INSTR AND fi'IF'R DANIEL INDUSTRIES ORlflCE FLOW S~CTJUN TYPE/~ODEL NU~BER HT*43T SERIAL NUP'SER NO~E RANGE/FEATURES 0.750 IN DIAM PIPE ACCURACY 0.75 PCT. OF INDICATION DATE CALIBRATF:D 11~6-78 ~ITH 18183 ANO 1A361 CALIBRATION OUE 11*6*79 TO 4.98 GPM F.S.

INSTRUMEhT NUMBER 18269 INSTR AND ~F'R GE AC AF-IMETER TYPE/MODEL NU~RER PANEL MOUNTED wl'fH CUR~E~T X SERIAL NU.,BF-R NONE

~ANGE/FEATURES 0 TO 100 PCT. r.s. 2 PCT.IDlV ACCURACY 2.0 PCT. OF F'.S.

DATE CA t.1 BRATED 11*7*78 20 A r.s.

CALIBRATION DIJE 5*7*79 INSTRUMENT NU~RER 18287 l~STR AND MFR ESTERLINE ANGUS TWO P[N RECO~OER SERVO ll TYPE/NOD~L NU~BER L11025 SERIAL NUfltBER 908859

• RANGE/FEATURES MV SPAN ~OJUST WIT~ ELECT. T.C. P£F. JUNCTS.

ACCU~ACY o.2s PCT. er F.s.

DATE CALIBPATD 1*22*79 0 TO 200 PSIG F.s.

CALIBRATlOh DUE 5*22*79 0 TO 400* DEGREES F r.s.

INSTRUMENT NUMB£R 18292 INSTR ANO ~F'R GE A>i!HETER TYPE/~ODEL NU~BER PANEL MOUNTED wITH CURF<ENT X SERIAL NU"'BF.R NONE RAhGE/f"EATURES O TO 100 PCT. r.s. 2 PCT./DIV ACCU~ACY 2.0 PCT. OF' F.S.

DATE CALIBRATED 11*7-78 20 A r.s.

CALIBRATlO~ DUE 5*7*79 A-4

L ,.\ i 15 LIST OF DATA ACQUISITION INSTRUMENTS F*C5115 INSTRUMENT NU~BER 18353 INSTR AND ~F'R SIMPSON AC VOLI~ETER TYPE/MODEL Nu~BER NONE SERIAL hU~Bf.R 34841 RANGE/FEATURES 0*10 V AC ACCU~ACY 3.0 PCT. OF F.s.

DATE CALIBRATED 1*29-79 CALI8RATI01'l DUE 7*29*79 INSTRUMENT NUMBER 18361 INST~ .AND MFR DANIEL ORIFICE PLATE TYPE/MODEL NUM.BER 500 SERIAL NUMBF:R NONE R A NG f. If' EAT lJ RES 0.375 IN DIAM ACCURACY o.*25---PCT. OF r.s*.

DATE CALIBRATED 11*6*78 WITH 18249 CALIBRATION DUE 11*6*79 A-5

L ,,

Acceleration of Post-LOCA Simulation Appendix B

Acceleration of Post-LOCA Simulation The initial test plan developed by the client specified that final cable exposure conditions of 152°F (66.7°C)/5 psig (34 kPa), representing post-LOCA conditions, were to be provided for a period of one year. In order to reduce the test duration to a more reasonable value, the Arrhenius model was used to accelerate the post-LOCA exposure.

In accordance with this model, aging of the cable insulation is governed by the following chemical reaction rate equation

.£.9.

- .L kT

- -BT

= Ae = Ae (1) dt where chemical reaction rate A = rate constant, usually determined by experiment B = cp/k

T1) B-1 The value of B determined by AIW was 6086 K. Using this in Eq. (2) yielded the following sets of values for T2 and t2: T2 t2 204°F (95.5°C) 90 days 209°F (98.3°C) 80 days The value of 80 days at 209°F (98.3°C) was selected. The actual length of the S/C exposure at 209°F (98.3°C) was 82 days, two days longer than the calculated t2, to account for pe~iods when the vapor temperature in the test vessel was slightly below 209°F (98.3°C). B-2 A* <.'IJ '* Certification of Irradiation Appendix C ISOMEDIX January 23, 1979 Mr. David Paulson Franklin Research Labs 20th & Cherry Streets Philadelphia, Pa. 19103

Dear Mr. Paulson:

This will summarize parameters pertinent to the irradiation of your mandrel Project #C5115 containing Cables #1 through #12, per your order 42419 dated December 29, 1978.

The mandrel was placed in a Cobalt-60 gamma field and exposed at each of 4 quadrants as marked. By integrating the dose rate at any point on the mandrel during its 4 position*exposure an average dose rate was obtained which, when multiplied hy the total exposure time yields the total dose.

Mandrel C-5115 was exposed for a period of 311.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> at an average dose rate of .66 Megarads per hour, yielding a total dose of 205.5 Megarads.

Dosimetry was performed using an Atomic Energy of Canada, Ltd.

(AECL), Red Perspex system with Type BC-2 readout. Calibration of the Perspex is made by AECL using eerie dosimetry traceable to the JJ.S.National Bureau of Standards. Isomedix regularly cross-calibrates its AECL system with an in-house Harwell Perspex system, and makes semi-annual calibrations directly with NBS, using the NBS Radiochromic Dye system. A copy of the dosimetry correla-tion report is available upon request.

Irradiation was conducted in air at ambient temperature and pressure. Radiant heat from the source heated the samples some-what, but the temperature did not exceed 85°F, as indicated by previous measurements on an oil solution in the same relative position.

Irradiation was started on date of receipt December 30, 1978, and was completed on January 21, 1979.

Very truly yours,

.~A~/.~

Louis Castaldi Ass't. General Manager LC:km lsomedix Inc.

• 25 Eastmans Road, Parsippany, New Jersey 07054. (201) 887-2666