U-600450, Requests Deviation from 325 F Max Temp Criterion on Unexposed Side for Penetration Seal Qualification Fire Tests.Supporting Info Listed.Temp of Conduit Seals Does Not Decrease Level of Fire Protection in Plant

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Requests Deviation from 325 F Max Temp Criterion on Unexposed Side for Penetration Seal Qualification Fire Tests.Supporting Info Listed.Temp of Conduit Seals Does Not Decrease Level of Fire Protection in Plant
ML20137U310
Person / Time
Site: Clinton Constellation icon.png
Issue date: 02/17/1986
From: Spangenberg F
ILLINOIS POWER CO.
To: Butler W
Office of Nuclear Reactor Regulation
References
U-600450, NUDOCS 8602190112
Download: ML20137U310 (3)


Text

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U-600450 L30-86 (02 -17 )-L B51-86 (02 -17 )-L 1A.120 ILLINDIS POWER 00MPANY

! CLINToN PonER STATION, P.O. Box 678. CLINToN. ILLINOIS 61727 February 17, 1986 l

Docket No. 50-461

-Director of Nuclear Reactor Regulation Attention: Dr. W. R. Butler, Director BWR Project Directorate No. 4 Division of BWR Licensing U.S. Nuclear Regulatory Commission Washington, DC 20555

Subject:

Clinton Power Station BISCO Penetration Seals

Dear Dr. Butler:

Illinois Power (IP) requests a deviation from the 325*F maximum temperature criterion recommended by Branch Technical Position CMEB 9.5-1, Section C.5.a(3)(b) on the unexposed side for penetration seal qualification fire tests. This recommendation is based upon ASTM E-119

" Standard Methods of Fire Tests of Building Construction and Materials."

Clinton Power Station uses fire rated penetration seals designed and installed by Brand Industrial Services Inc. (BISCO). BISCO Reports 748-15 and 748-64 identify some thermocouples on the unexposed side

.where the temperature readings exceeded 325'F. These reports provide results of fire tests performed on conduit penetration seals. Our evaluation of this condition and BISCO's review of the test results as state'd in BISCO's letter of January 27, 1986 (attached), have determined that the penetration seals in question do provide an acceptable level of fire protection and meet the intent of ASTM E-119 based on the following:

ASTM E-119 standard time-temperature curve and hose stream tests were satisfactorily conducted during the qualification tests performed by BISCO.

The heat conducted through the metal conductors and the conduit results in documented temperatures greater than 325'F which are not truly reflective of the unexposed surface temperature.

Fire tests performed on penetration seals with larger unexposed I area show that the 325'F temperature limit is met by thermocouples located away from the penetrating item.

8602190112 ADOCK O BM 61 PDR PDR F

Soot

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U-600450 L30-86(02-17)-L B51-86(02-17)-L 1A.120 In conclusion, it is IP's position that the described condition is an acceptable installation and does not decrease the level of fire protection in the plant. If you need further information, please advise.

Sincere yours,

. lp k F. A. pan nberg Mana er - icenni and Safety OV/DW/ckc Attachment cc: B. L. Siegel, NRC Clinton Licensing Project Manager NRC Resident Office Regional Administrator, Region III USNRC Illinois Department of Nuclear Safety

Attachment bisco '

January 27, 1956 brand industrial services, Inc.

3285-563WJA 1420 rena'ssance drive park fldge slhnois 60068 (3121 299 1200 Illinois Power Company feie, pyy,sc erand ped P.O. Box 675 Clinton, Illincis 61727 Attention: Mr. James E. Loomis Cen-truction Manager

Subject:

3:5:3 Tests 748-15 and /4C 44

Reference:

Clinton Power Staticn Specification K-2540 Project No. 45'o-05 Gentic ren:

BISCO's fire tests 748-15 and 748-64 c*o have several unexposed thernoccuries that exceeded the temperature limits of ASTM-E-119 and NRC Reg. Guide 06 0 which is predictable considering the cable fill limits the area of the un-exposed surface to sucn a minute size that its virtually impossible to install a thermocouple without coming in contact with a cable or the conduit. 11c t h conduct a great deal of heat resulting in documentation not truly reflective of the unexposed surf ace temperature as dictated by ASTM and NRC standards.

It should be noted that IEEE-634 has taken this problem into account bv allowing an interface temperature not to exceed 700*F. Both tests meet the IEEE-634 criteria.

Tests 748-41 and 3001-03B with a larger unexposed surface area passed the ASTM E-119 and E C Reg Guide 800 criteria using the same raterial and inn illed depth as used i- the above mentioned tests, thus hmonstrating the a; of the materi. :o provide a 3-hvir fire seal as i.quir, It is BISCO's position the installed seal design in BlSco Test 746-15 748-64 will previde the required 3-hour fire seal for entiu i t s at c. l i : n '

If you should have any questions f. 1 tree to omt,-t th: office Respectful 1. S H itted, l&kI[ <a ,,, ,l- ;/!ls~,.v. , R A' William J.vAckerman Construction Manager WJA/LR/dp cc: R. bhat, SSED A. Shevade c ..ters.

W. &ketman L Sir s

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