ML17275B279

Forwards Test Procedure for Weidmuller/Supply Sys Joint Terminal Block Test Program to Be Conducted at Wyle Labs. Start Date Is Targeted for 811016

ML17275B279
Person / Time
Site:	Columbia, Washington Public Power Supply System, Satsop
Issue date:	10/09/1981
From:	Bouchey G WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Eisenhut D Office of Nuclear Reactor Regulation
References
NUDOCS 8110130222
Download: ML17275B279 (17)

Text

RKt'UL TORY INFORMATION DISTR I BUT N SYSTEM (R IDS)

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SUBJECT:

Forwards test procedure for Wei dmu) er/Suppl y Sys J oink 1 termiinal block. test program to be conducted at Hyle Lebs'D Ster t date is targeted>> for 811016 ~

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Washington Public Power Supply System P.O. Box 968 3000 George Washington Way Richland, Washington 99352 (509) 372-5000 Mr. D. G. Eisenhut, Director Division of Licensing Office of Nuclear Reactor Regulation 9)SB1~

U. S. Nuclear Regulatory Commission OCT Washington, D.C. 20555

Subject:

Weidmuller/Supply System Joint Terminal Block Test Program This test program will be conducted at Wyle Laboratories , Norco, California facility in the near future. A meeting was held at Wyle September 17, between Wyle, Weidmuller and the Supply System to dis-cuss the technical aspects of the test program and resolve any differ-ences that might arise and also to assign the various responsibilities.

Wyle has provided the Supply System with a schedule as to when the testing will start and end. The start date is targeted for Friday, October 16, with test completion expected Wednesday, November 25.

Test setup and checkout will start Thursday, October 15.

A test procedure has been included as an 'attachment to this letter for your consideration. The test samples have been previously aged and tested by Weidmuller. Our test program is an extension of the post-LOCA conditions one might expect inside containment at our Nuclear Project No. 2 (WNP-2).

The cognizant contact for further information concerning this program is Mr. J. E. Rhoads. Mr. Rhoads may be reached at (509) 372-5271.

Please address all formal comiunications to my attention.

Very truly yours, G. D. Bouchey, Dire or Nuclear Safety f

GDB:CJZ: awp Attachment cc: A. Bennett, NRC, Mail Stop 359 E/W 8110130222 811009 PDR ADOCK 05000397 A PDR

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Page 1 of 2 TEST PROCEDUCE FOR POST-LOCA UALIFICATION TEST PROGRAM The test specimens consist of five different assemblies of Weidmuller Terminations, Inc. Rail Mounted Modular Terminal Blocks which have previously completed the gualification Test Program Sequence detailed in Franklin Research Center Report F-C 5205-3. The five specimens are each housed in a Hoffman Type NF NEMA 4 Enclosure, Catalog No. A-806 NF which has previously been exposed to the LOCA/MLSB Simulation in Test Program F-C 5205-3.

~Secimens are identified as fo11ows:

RRCRR R. ~C ~C" l Remarks 5205-A SAK10 6943.0 No intermediate barriers 5205-B SAK6N 6942.0 No intermediate barriers 5205-F SAK6N 6942.0 With intermediate barriers 5205-G SAK10 6943.0 With intermediate barriers 5205-0 SAK4 6941.0, With intermediate barriers

• These FRC references are stamped into the mounting rail of the terminal block ass emb1 i es.

Test Arran ement The enclosures, complete with terminal block specimens, will be,,installed inside the test vess'el on a suitable framework such that the: major axis of the enclosures is horizontal with the wire entries on the underside'. (Generally as illustrated on the 'enclosed Figure 1.)

The teminal blocks are to be wired using GE Vulkene XLPE $ 12 AWG 7 strand wire with alternate poles in series. (Generally as indicated in Figure 7 of the Report F-C 5205-3, except that each specimen shall have an independent potential and current source.) With this arrangement, each terminal block will be energized with a test current of 20 Amps 60 Hz and adjacent poles will be at 600 V AC potential.

The connections from the terminal blocks shall be routed through the NEMA 4 Enclosures through existing Crouse Hinds Type CGB 192 Compression Fittings and the wires shall pass from the terminal block specimens through the wall of the test vessel to the supply source and monitoring equipment in one continuous length (without the use of intermedite butt splices). Means shall be provided to monitor leakage currents on a continuous basis.

Means shall be provided to disconnect individual specimens from the supply source in the event of excessive leakage currents occurring in that specimen.

Means shall be provided to ensure continuity of the grounding between the mounting rail of the terminal blocks and the ground termination external to the test vessel.

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Page 2 of 2 Test Procedure for Post-LOCA ualification Test Pro ram - Cont'd The lids of the NEMA 4 Enclosures are to be fitted and secured.

Test Procedure Contact resistance mesurements will be made from a termination or base con-ductor to terminal strip bar for one (1) of each pair of opposite terminals.

The contact resistance measurement will be made prior to installation of test items in test chamber.

The wired specimens will be subjected to Insulation Resistance measurements at 500 V DC. The measurements shall be made, on each'specimen, a) between adja-cent terminal blocks, and b) betwee'n all terminal blocks and ground.

Pg All supply sources, measuring instruments and monitoring equipment is to be calibrated.

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tl The specimens are to be energized and the test vessel subjected to the speci-fied environmental conditions:

Temperature: 230oF Steam Pressure: 30 Psig Spray conditions to be demineralized water activated intermittently.

Duration of the test: 40 days (960 hours0.0111 days <br />0.267 hours <br />0.00159 weeks <br />3.6528e-4 months <br />)

The direction of the Steam and Chemical Spray shall be agreed.

Throughout the duration of the program, the leakage currents shall be moni-tored and in the event of excessive leakage currents occurring on an indi-vidual specimen, this shall be disconnected from its energizing source.

(Excessive leakage current is 1 Amp or othe agreed value dependent on the available power source.)

On completion of the forty-day environmental sequence, specimens shall be subjected to Insulation Resistance readings at 500 V DC. The Insulation Resistance shall again be measured 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after the test vessel is opened up.

Contact resistance measurements will be performed as indicated above after the test specimens are removed from the chamber.

Some splice connections are going to be made inside the NET-4 enclosure to address the moisture leakage problem outlined in IE Circular 79-05.

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