ML20050C964
| ML20050C964 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 06/07/1978 |
| From: | ROCKBESTOS CO. |
| To: | |
| Shared Package | |
| ML20050C841 | List:
|
| References | |
| RTR-NUREG-0588, RTR-NUREG-588 IEB-79-01B, IEB-79-1B, NUDOCS 8204090456 | |
| Download: ML20050C964 (11) | |
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i QUALIFICATI0f( OF FIREWALLs SR
. CLASS lE ELECTRIC CABLES
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THE ROCKBESTOS COMPAfiY New Haven, Conn. 06504 l
0204090456 820407 DR ADOCK 05000327 PDR
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TITLE PAGE NO.
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PURPOSE 1
TEST SAf1PLE DESCRIPTI0ft 1
PROCEDURE 2-3
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C0flCLUSION 4
l THERMAL AGIrlG 5
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ARRHENIUS PLOT
'6 LOCA PROFILE 7
RADIATION EXPOSURE
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PURPOSE e
The purpose of this test program is to demonstrate that I-Firewall* SR electric cables will function during a loss of coolant accident (LOCA) postulated to occur at any
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time during 20 years of operation under conditions as prescribed by IEEE 383-1974.
TEST SAMPLE DESCRIPTION e
Single conductor #14 AWG with 30 mils of methyl-phenyl-
- vinyl silicone insulation identified as Rockbestos e
Firewall SR.
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PROCEDURE I.
Test Sample Preparation Two samples ("A" and "B") each made up of three 10 ft.
pieces of cable were formed into test coils.
II.
Refe'rence IEEE 383 Paragraoh 2.4.1.1 In order to demonstrate the serviceability of Firewall SR during and after a LOCA occurring during the first days of installed life, the "A" samples were first subjected to a 0
radiation dosage of 2 x 10 rads and then sub'jected to the LOCA profile of IEEE 323 for combined PWR/BWR while energized with 600 VAC and 30A.
Following this exposure, the o
samples were straightened and recoiled with an inside diameter of 40 times their 0.0.'s and immersed in tap water at room temperature. While still immersed, the samples were sub-jected to and passed a voltage withstand test for 5 minutes at a potential of 80 V/ Mil AC.
III. Reference IEEE 383 Paracraoh 2.4.1.2
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In order to demonstrate the serviceability of Firewall SR during and after a LOCA occurring during the last days of 20
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year installed life, the "B" samples were first thermally aged in a circulating air oven for 400 hours0.00463 days <br />0.111 hours <br />6.613757e-4 weeks <br />1.522e-4 months <br /> at 250*C in order to simulate 20 year installed life at a continuous operating temperature of 200*C; then subjected to a radiation 8
dosage of 2 x 10 rads; and then subjected to the LOCA profile
3.
of IEEE 323 for comb ned pWR/BWR while energized with 600 VAC and i
30A.
Following this exposure, the samples were straightened an'd recoiled with an inside diameter of 40 times their 0.D.'s and im-
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mersed in tap water at room temperature. While still immersed,
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the samples were subjected to and passed a voltage withstand test for 5 minutes at a potential of 80 V/ Mil AC.
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CONCLUS10t!
I Having successfully withstocd the conditions and tests j
as described in the preceding procedure, we certify that Firewall SR cables will function for at least 20
' years at a continuous operating temperature (conductor temperat'ure) of 200*C and af ter a radiation exposure of ' "~"~"-
200 megarads and during a pos tulated Loss-of-Coolant-Accident (LOCA) occurring at any time during the 40 years.
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[JamesR.Marth Cable Engineer June 7, 1978
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LOCA Profile Spray for first 24 hrs, at rate of 0.15 gpm per square foot of spray area with solution of the following composition:
0.28 molar H 80 (3000 ppm boron) 3 3 340 104 psig 104 psig 0.064 molar fla S 0 223 I
fla0ll to make pH between 9-11 at 77'F.
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,s ISOMEDIX
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j August 24, 1976 Mr. J. R. Marth Cerro Wire & Cable Co.
P.O. Box 1102 New Haven, Connecticut 06504
=. - -. - - - -
Dear Mr. Marth:
This will summarize parameters pertinent to the irradiation of a mandrel with 43 cable samples per your Order 75404, dated July 16, 1976.
The mandrel was placed in a cobalt-60 gamma field in an upright position, which paralleled the long axis of the radiation source.
The mandrel was exposed at each of 4 quadrents, as marked with tape on its top.
By integrating the dose rate at any point on the mandrel during it's 4-position exposure, an average dose rate was obtained which, when multiplied by the tota-1 exposure time, yields total dose.
The test required that the cables be exposed to 200 Mrad.
They were exposed for a total of 400 hours0.00463 days <br />0.111 hours <br />6.613757e-4 weeks <br />1.522e-4 months <br /> at an average dose rate of 0.5 Mrad per hour for a total dose of 200.7 Mrad.
Irradiation was conductied in air at arebient temperature and pressure.
Radiant heat from the source heated the samples somewhat, but the temperature did not exceed 1100F, as indicated by previous measurements on an oil solution in the same relative position.
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Dosimetry was performed using a Victorcen Model 555 Integrating Dose Rate Meter and Probe.
The unit was calibrated on August 16, 1975 by the Victoreen Instrument Company, using cobalt-60 and cesium-137 sources whose calibrations are traceable
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.to the U.S. National Bureau of Standards. A copy of the calibra-l tion certificate is available.
Backup dosimetry using a Red l
Perspex system confirmed the Victorcen readings.
Irradiation was completed on August 9, 1976, and the mandrel was picked up by your personnel on August 10.
Very truly yours, I
A l
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l George W. Dic :
l GRD:km Manager, Radiation rvices Isomedix inc.
25 Eastmans Roso. Parsippany. New Jersey (201) 887-4700 l
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. ENDES ICIV VU '!!!F0 MASTER l-316265A166 06/IS/78 T*JX ROC %3ESTOS.ATL ZCZC I*SG J1 ATLAI*TA, GA. 6-15-78 TLX 55-7437 ENDESKXV J.
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. DATED JUNE 7, 197S (g
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REGARDI:!G PAGE 4 "COI*Ci.USIOf!"e THERE IS A !IS-PRINT
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23 HAVING SUCCESSFULLY 'iITHST00D THE.CONDITIO!*S AND TESTS AS DESCRI2ED IN THE PRECEDIU3 PROCEDURE, UE CERTIFY THAT FIREWALL SR CA?LES UILL FU:ICTICU FOR AT LEAST 22
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YEARS AT A CONTIMUQUS OPERAT!!!G TEMPERATURE CCONDUCTOR e
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TEt'PERATURE) 0F 2G2 DE3REE C AND AFTER A RADIATIOM EXPOSURE 0F 203 XEGARADS AND DURIN3 A POSTUI.ATED LOSS-OF-COOLANT-2 5
ACCIDENT (LOCA) CCCURING ANY TII:E DURIMG THE 2C YEARS.
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ROCK 3ESTOS COMPANY stscr inca saAsen 813-766-1383 ROCKEESTOS ATL J,UN 16
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