ML20028F797
| ML20028F797 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Perry |
| Issue date: | 08/25/1982 |
| From: | Davis A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20027A600 | List: |
| References | |
| FOIA-82-545 NUDOCS 8302040386 | |
| Download: ML20028F797 (1) | |
Text
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flaidd EP 1208 IERP REC 0!!!!ENDATIONS Part 1 Action Division:
DETP Recommendation:
Enclosed is a memorandum relative to Perry concerning flammable material used in Class IE switchgear. Please let me know the action you plan and schedule 4
regarding this matter. May I have your reply by 9/24/82 please.
Orlsinal signed by
.A. Bert Davrs IERP Signature Part 2 4
Action Planned by Action Division or Office:
4 Division Director
Enclosure:
as stated cc:
. A. Maura YK. R. Naidu sr B302040386 821230 PDR FOIA 8/25/82 HIATT82-545 PDR
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's JUN 2 4 GS2 MEMORANDUM FOR: C; E. Norelius, Director, Division of Engineering and Technical Programs TilHU:
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. S. Little, Chief, Engineering Inspection Branch 7
b'illiams, Chief. Plant Systems Section FROM:
K. R. Naidu, Reactor Inspector
SUBJECT:
USE OF FLA1DIABLE MATERIAL IN CLASS lE Sh'ITLilGEAR ITEM OF CONCERN During a routine inspection conducted at Perry Nuc1 car Power Station Units 1 and 2 between February 22-25, 1982, the inspector observed the following types of highly flammable cable mounting bases being used in Class IE switchgear, qualified to IEEE-323 which specifies the use of flame-retardant materials.
Tho.nas 6 Betts (T6B) catalog 41C0345A which has an adhesive base T6B Catalog ETC-345 which is stuck with epoxy T6B Catalog (IC-5344A which has an adhesive mounting base These mounting bases are field procured and used by the installation contractor to train cables inside cabinets, switchgear, etc.
T6B TC-345A and TC-5344A are highly flammabic. Use of these mounting bases may void the IEEE-323 and IEEE-383 qualification because of its flammable nature. The licensee plans to justify the use of these highly flammable. cable counting bases because the Ifcensee has not committed to IEEE-383 in the FSAR; only committed to lEEE-323 which references IEEE-383.
During an inspection at Callaway station from April 26 to May 7, 1982, the inspectors observed nounting bases T&B TC-353A being used in Class 1E equipment. The inspectors ignited these mounting bases and they readily burned.
In this case, the licensee issued a memorandum to discontinue the use of these mounting bases. A contractor terminations engineer who was recently transferred from Fermi Nuclear Power Station inforraed the inspector that these types of bases were extensively used at Fermi.
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.-1 n.s s r4 ee v mnting hases are construct ion accessories, procured onsite, by the ..autte constructor. As such, its characteristics are not specified in installation specification. In addition to the*above, both Callaway and Perry installed battery chargers manufactured by Power Conversion, Incorporated. These units have ficxibic plastic wire harness holders and terminal strip covers which are highly flammable. I recommend the following actions be taken expeditiously: 1. Alert Regions 1, 11, IV and V of the use of flammable mounting bases t which may negate the IEEE 303 and IEEE 323 qualification. 2. Request NRR/EQB to evaluate the use of these mounting bases and inform the regions relative to flame-retardancy, radiation environment and seismic retention capability. Early action on this matter may prevent extensive use of this questionable material. An Information Notice may be sent if required. A gt[6tbl
- r K. R. Naidu Reactor Inspector j
cc: Zoltan Roszotoczy, NRR DMB/ Document Control Desk (RIDS) m v. \\ l --- =-
F 7 ~ IE INFORMATION NOTICE NO. 82 Use of Non-Flame Retardant Installation Accessories in Class IE Switchgear During.outine inspections at two Nuclear Power' Plants, inspectors observed the use of the following types of highly flammable material: Cable Mounting Bases: Mounting base is a cable training accessory (made of plastic compound) which is stuck to the surface of the sheet metal inside a cabinet switchgear, etc. A ty-wrap can be inserted to fasten the cable. These mounting bases were procured by the installation contractor without respective AE's evaluation for fire, radiation resistance and seismic strength. The following are the examples: Thomas & Betts (T6B) Catalog TC-345A (with an adhesive base). T6B Catalog TC-5344A (with an adhesive base). T6B Catalog TC-345 without an adhesive base. It is mounted with separately supplied epoxy. This mounting base does not support combustion. T6B Catalog TC-353A with an adhesive base. Use of mounting bases in Class IE switchgear and panels will negate the qualifications IEEE 323 and IEEE G83. c.
l In addition to the above, the following flammabic accessories were observed: Terminal block covers: A highly flammabic sheet of plastic screwed o to a terminal block in Power Conversions Inc. battery chargers. Wire Idreness lloider: A helical plastic spring to hold together cables terminated on the front panel which swings open. Plastic Grommets: The plastic grommets were used in a Cutler Hammer Motor Control Center. The plastic grommet protects the rough edges of openings through which cables enter the switchgear. In this instance the IEEE 383 was not specified in the purchase order. However, the equipment is qualified to the requirements of IEEE 323; compliance to IEEE 383 referenced in the Foreword of IEEE 323. Construction Permit holders are requested to examine their field procurement practices and determine whether non-flame retardant materials such as the above are being procured and installed which may negate their qualifications relative to fire hazards. l c v , ~., - ,. -.,., - -.}}