ML18031A317

Interim Deficiency Rept Re Violation of Separation Criteria for 4.16 Kv Switchgear.Problem May Be Generic.Followup Rept to Follow

ML18031A317
Person / Time
Site:	Susquehanna
Issue date:	11/29/1979
From:	Curtis N PENNSYLVANIA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
840-4, NUDOCS 7912040507
Download: ML18031A317 (4)

Text

REbULATO INFORMATION DISTRIBUTION'EM (BIOS)

ACCESSION NOR t 791?040507 OOC ~ OATt,t 79/1 1/29 NOTARIZED: NO OOCKET VACIL:50 387 Susquehanna Steam Klectric Station~ Un/t 1i Pennsylva 0500 50 388 Susquehanna Steam Electric Stationi Unit 2~ Pennsylva 050 88 AU[H ~ NAME, a'urHUH AFFILIArION CuATIS,N,W, Pennsylvania Power 5 Light Co, HKC IP ~ hAMK H EC IP I EN T AFFILIATION Hegion li I hiladelphiai Office of the Director

SUBJECT:

Interim deficiency rept r e violation of separation cr i ter ia for 4 ~ 16 kY switchgear,Problem may be generic<Fol lowup rept to f o.l I D IS TR I BUT ION COOK: B019S ow,'4 COPIES HECK I VKD:LTH ENCL SIZE t T=ITLh: Construction'De'fici enCy Report ( 10CFASO 55E)

NuTEs:~ zl RKC IP IKN I CUPIES RKCIPIENT COI IES ID I:OOK/NAME LTrR ENCL IO COOK/NAME LTTA ENCL ACTION: PM &INFR. 15 BC l brRR P 20 LA Lt 21 AO ~~/

INTEHNAL~ H. 0? NRC POR 05 li 08 MPA K 07 EOO 8 STAFF 09 DEPY DIA OPM 10 12 GAB JORDANzE/IK ll STANORDS 13F IKLD COOH/IE OKV 16 AO FUH RNGA 17 AO PLANT 6YS 17 AO REAC Sl"TY 22 OIR OPM 23 OELO AO/SITE TECH DIRECTOR OSE GEU8CiKNCFS BR ISC SYS BR MATL ENG BR MECH ENG BR POWER SYS 8R 8 HANAUKR STRUCT Ki'IG 8H EXTERNAL: 03 LPOR 1 04 NSIC 24 ACRS 16 1 gEC 6 1979 TO I'AI. NUMBER UF COPIES HKQUIHEO>> LT I'R 47 ENCL 0

t f' es g

)g

TWO NORTH NINTH STREET, ALLENTOWN, PA. 18101 PHONE: (21S) 821 ~ S IS I NORMAN W. CURTIS Vice presioent.Engineering 8 Construction 821.$ 381 November 29, 1979 Mr. Boyce H. Grier Director, Region I U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406 SUSQUEHANNA STEAM ELECTRIC STATION INTERIM REPORT OF A DEFICIENCY REGARDING VIOLATION OF SEPARATION CRITERIA FOR 4 ~ 16 KV SWITCHGEAR ERs 100450/100508 FILE 840-4 PLA-426

Dear Mr. Grier:

This relates to a deficiency, reportable under the provisions of 10CFR50.55(e)r which was identified to Mr. Robert Gallo, NRC Resident Inspector, by Mr.

A. R. Sabol of PPsL during a telephone conversation on November 21, 1979. The deficiency involves separation criteria for vendor supplied electrical panels and switchgear.

Section 3.13.1 of the Susquehanna Steam Electric Station FSAR requires applica-tion of the electrical separation criteria of Regulatory Guide 1.75 Revision 1 (1/75) and commits to the use of IEEE Standard 384-1974.

MCAR-1-38 was written by Bechtel on October 12, 1979 as a result of NCR 4277.

The nonconformance, which was discovered on August 1, 1979, relates to an apparent separation violation in the 4.16 KV Switchgear. The MCAR'urther documents the facts that although Electrical Separation Description Drawing E60 Rev. 4 was revised by DCN 1 (4/3/79) to require separation for cables terminated inside electrical equipment, similar separation requirements were not delineated or incorporated into project specifications to govern vendor wiring since the equipment had been fabricated and shipped to the jobsite.

PPsL has determined that the following conditions reported in MCAR-1-38 represent a deficiency reportable under 10CFR50.55(e):

l. Vendor wires for redundant DC Feeder Cables are run w'thin six inches of each other in the 4.16 KV Switchgear 1A203 and lA204.

PENNSYLVANIA POWER 8 LIGHT COMPANY

'rote o4o +@7

Mr. Boyce H. Gxier November 29, 1979

2. At various locations inside switchgear compartments, vendor wiring, vendor jumpers and field jumpers are bundled in common with Class lE wiring of different divisions and/or Non-Class lE wiring.

The potential genexic problem involved is under review and will be evaluated by PP&L after Bechtel's evaluation is completed. The condition is deemed reportable for the following zeasons:

1. The conditions represent a significant deficiency in final design as approved and released fox construction such that the design does, not conform to the criteria and bases stated in the FSAR. The equipment internal wiring does not conform with the sepazation criteria stated in FSAR Section 3.13.

2. The conditions, were they to have remained uncor ected, would have adversely affected the safety of operations of the nuclear power plant. A single event could have resulted in multiple failure within a Class 1E switchgear which could degrade two redundant Class lE channelized battery systems.

A follow up letter will be submitted to identify the date by which a final definitive report will be provided.

Very truly yours, q(g Cm Curtis N. W.

Vice President-Engineering & Construction ARS:mcb ccrc Mr. Robert M. Gallo U. S. Nuclear Regulatory Commission P. O. Box 52 Shickshinny, Pennsylvania 18655 Mr. G. McDonald Office of Management Xnformation & Program Contx'ol U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. Victor Stello (15)

Director Office of inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555