ML20215N351

Rev 4 to Mods & Additions Instruction M&AI-6, Installation of Conduit & Junction Boxes

ML20215N351
Person / Time
Site:	Sequoyah
Issue date:	08/17/1983
From:	Cowan L, Legg E TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20215N324	List: ML20215N323 ML20215N330 ML20215N333 ML20215N337 ML20215N338 ML20215N340 ML20215N351 ML20215N355 ML20215N359 ML20215N362 ML20215N370 ML20215N379 ML20215N383 ML20215N384 ML20215N390 ML20215N393 ML20215N395 ML20215N400 ML20215N407
References
M&AI-6, NUDOCS 8611050273
Download: ML20215N351 (25)

Text

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NEAI-4 4: T IIsistamance Superviser 00 3 Assistaat flehe- Saposviser (5) h

! E INSTALIATION OF CONDUIT AND -

THeistenance Superviser (E) 3 W ., JUNCTION BORES T Assistant Naistenance Superviser (E)

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Reases for current revistem (include all tamporary chasse asabers) Revised is ti accordance with Temaererv Chanae No. 43-0769. 700C r : m d S/11/83.

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Mistory of Fttf ricar serAI-6 .

7 I Rev. No. _Date R& vised Petes Rev. No. Date Revised Panes 0 11/8/79 All I 11/19/81 18 1

Aevised 12,13.16,17, 2 07/08/42

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TAB!2 0F CorfENTS 1.0 o .......... .................

I 1.1 Sc o pe . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Drawinas . . . . . . . . . . . . . . . . . . . . . . .

1.3 Det'inition . . . . . . . . . . . . . . . . . . . . . .

2.0 MATERIALS . . . . . . . . . . . . . . . . . . . . . . . . . '

2.1 General . . . . . . . . . . . . . . . . . . . . . . ..

2.2 Major or Special Materials . . . . . . . . . . . . . .

2.3 Miscellaneous Materials . . . . . . . . . . . . . . . .

30 INSTALLATION . . . . . . . . . . . . . . . . . . . . .. . .

I 3.1 General . . . . . . . . . . .

3.2 Condutt . .......................

3.2.1 General . . . . . . . . . . . . . . . . . . . . . . . .

I 3.2.7 Exposed Conduit . . . . . . . . . . . . . . . . . . . .

3.2 3 Dabedded Conduit . ...................

3.2.4 Riald Metal Conduit . . . . . . . . . . . . . . . . . . .

3.2.4.1 General . . . . . . . . . . . . . . . . . . . . . . . .

I 3.2.4.2 Steel Conduit and Intermediate Metal Conduit (IMC) . . . . . ................

3.2.h.3 Al min e Conduit . . . . . . . . . . . . . . . . . . . .

I 3.2 5 Plastie Conduit . ....................

3 2.6 Flexible Conduit . ....................

3.3 Conduit Boxes . . . . . . . . . . . . . . . . . . . . . . . .

3 3.1 General . . . . . . . . . . . . . . . . . . . . . . . . .

3.3.2 Paintina . . . . . . . . . . . . . . . . . . . . . . . .

3.3.3 Seismic Mountina . . . . .*. . . . . . . . . . . . . . . 8 3.3.h Identification Markina . *. . . . . . . . . . . . . . .

b.0 INSPECTION RIgJIREMENTS ....................

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1.1 Scope -

This instruction covers field installation of all electrical conduit systems I for Sequoyah Nuclear Plant. Procedures provided hr the contractor shall be followed for those portions of the design under separate contreet. '

1.2 Drawings

• The latest revision of the documents listed belear in effect at the time of (

installation shall be follovsd.

• DS-E1.2.2 - Electrical Equiguaent Nameplatee - Coquoyah and Subsequent Nuclear Plants BD-E131.1 - Expansica/ Contraction Joint for tubedded Aluminus, later-mediate Metal, and 8 teel Conduit I SD-E13.1.2 - Espansion and Deflectica Fitting for Embedded'Alinala m .

Intermediate Metal, and 8 teel Cooduit SD-E13.6.3 - Conduit Bones Frames, and Covers SD-E13.6.5 - Conduit Box Connectica (Watettight)

SD-E15 3.4 - Conduit, cable, and Vire Identifiera. ion Tags (seguaysk Nuclear Plant mal All Suboeguest Nuclear Projects)

Where speeltle instructions are lacking on design documents. EN DES shall be requested to provide the.necessary tafbreatice on a case-hr-esse basis.

I 1.3 Definitions Class 12. The safety classification of the electrie equipment sad systems l

' that are essential to emergency reactor shutdown, contatanaat isolation, reactor core ecoling, and ecataf a===t and zweeter heat removal, or other- -

vise are essential in preventing significant release of radioeotive material I

to the envirosuneet.

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CATE00RY I SfitlCTURES i

I The category I structures other than the primary contalament striactures are listed as follows: ,

I 1. Auxiliary-Control Building

a. Control Bay Portion ,

b. Auxiliary Building Portion

c. Waste Packaging Ares

d. Condensate Dominera11ser Waste Evaporator an"Ai== Portion

2. Condenser Cooling Water Pumping Statica and Detaining Walls 3 Auxiliary Essential Daw cooling Water Structures

h. Diesel-Cenerator Building 5 CO Storage Building 2

6. Defueltag Water Tanks and Pipe Tunnels 7 Cimas II Electrical Systems Structures

8. East Steen Valve Doom ,

9 Essential Daw cooling Water Pumping'8tatica and Aseess Cells

10. ERCW Discharge Box -

• 2.0 NATERTA!E .

2.1 General Materials used in the original installatica of the electrien1 eenduit systems and conduit bones shall be news shall meet the requirements of an l

I approved recognised s*=adads and aball be of kind, composition, and physical properties best adapted to their seversi purposes in accordance with best engineering practices. -

2.2 MmJoe or Special hierials Major materials and those of a special nature used in the installation I

j I shall be designated on IN DES detailed design drawings or standard drawings.

described la the electrical bill of material, and requisitioned Ig M-- --3 in the IRB Eguiposat Dequisition Group.

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l l Pass 3 of 16 2.3 Miscellaneous Materials I These aanteraala esv of a standard nature and shall be purchased directly by the fielo. Included are conduit bodivs and covers, conduit fittings.

Joints and terminations, flexible conduit, and other minor materials necessary for installation but not requisitioned by EN DES personnel.

Metallic conduit bodies, fittings. Joints, couplings, and terminations  !

(except for slip joints as permitted in section 3 2 3.7) shall be of the I

I threaded type ar.: ap; roved for use vn h conduit systems which serve as the equipment grounding conductor.

I Liquid-cight, fleainle metal conduit vith a synthetic jackit (similar to the Anaconda Company. Brass Division. "8ealtite type UA") and connectors (siallar to Ideal Industries. Incorporated. "Vap-Oil-Tight" series) shall be used for flexible conduit applications.

It shall be permissible to use the following as an alternative. Pressure-tight stainless steel flexible conduit with a convolute core structure (stallar to Servicair Company type 8860 series or American Boa. Incorporated.

type NB1-0 series) and connector fittings of compatible materials (available from the respective supplier) may be used for flexible conduit applications j I inside primary containment and may be used for applications outside contain-ment. Radiation-resistant elastomer seals, such as silicon rubber ethylene-propylene rubber or other TVA approved material, shall be used with the i

I connector fittings inside containment to maintain leak-tightness. Either the above type conduit or the type with a closed weave single braid stain-less steel Jacket (similar to Servicair Company type SS63 series or Amer- , 1 ican Boa. Incorporated, type NB1-a series) may be used. The stainless steel flexible conduit and appropriate connector fittings shall be instal- ,

led in accordance with the manufacturer's instructions. l I Copper-s111 eon alloy. brass, or plastic conduit plugs shall be used vbere spare conduits are terminated in wet places. j If additional restrictions or limitations are required on miscellaneous i

I materials to be purchased, these shall be so stated on the design drawings.

30 INSTALIATIOt )

3.1 General I 3.1.1 Installation of conduit, boxes, fittings, and accessories shall conform to the latest edition of the National Electric Code (NEC) and the drawings and standards described in sectica 1.2.

l In the event of a conflict between design drawings and NEC, the I

l drawings shall govern.

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lj 5 It interferences occur, the cegatsamt engiacer shall be actified 5 3.1.2 7,$

for resolutica by established ,.uM--s with N Ms. .

I 3 1.3 If it should become nosessary to make a field change every pre- - ,

caution shall be takaa to ensure that the ebenge is coordinated .i I with other oceduit work, streetural work, plashing west pipias. ,

and architectural featuress and information shall be obtained .

regarding the completed oceduit rist to ensure there will be no ,

interferesses uhen the conduit rum is estended. A oomplete I record of aar such ebesse shall be sent to W IW per AI-19. ,

unless specifically called for on the detailed design drawings, I -

3 1.4 structural steel or reinforeing bars shall not be out or drilled in sciamie structures.

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.t I 3.1.5 32 conduit Naterials shall b, properly proteetd mile sa storees. p:

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I 3 2.1 a.aera Conduit exposed to the weather, embedded la concrek.

a 3 2.1.1 or in wet locatiane shall be sloped for draiange. if l g possible. Sabedded condait systems shall be rigidly l

j supported and braced in position to avoid sett11as and to prevent the formatica of pockets if heavy batches of )

ocearete are placed on the condait.  ; l

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3 2.1.2 To teminate a oceduit beneath a suitehtoard or at as i I

I apparatgs, a banking, chase alpple, or ooedulet shall

' be used unless otherwise defined om desisa drawings. Ia .

certalin tastanees there it may be impossible to install I .

a condait bushing or ohnee alpple at each termination point of a conduit necease.of limitet space, the eoeduit end should be smoothee of all burra aat ob.

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streetions (beveled or* rounded to appresimately a 1/16" I radius) so that embles will met be damaged.

- 1 3 2.1.3 After a ocettit run la osapleted it shall be inspeeted ~<

I and eleased out. Compressed air shall be used la blesias out ase assimmalation of trupped liquid. ,

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I 3 2.1.4 Conduit its.sificatica tagging shall seeompany the coe.

duit installation. The tag shall be as designate 4 os the conduit design drearings and/or condait schedule and

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in accordamse with aleetrioal standard dremias S - 9 1 E15.3.4 (easept it shall ne pomissible to use black letterlag on temination tags for all but black book- .

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groume colors and to use roetangalar polystyrene tags  %

I ' for eendait identification), or it shall be pseude.

sable to see self-stieklag glar esadmit markers .

A (e.g., mer smeetal lastries or sau predmeta,3.p.g;g;;

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Incorporated), self-adhesive Polyester conduit markers I (e.g., W. H. Brady Company) or -inch miniman gridth ssalaless steel ribboa material with the designation made using a % mo tapewriter (or equivalent).

I In yard areas where oceduits are exposed to the natural envirossent, the conduit tag may be of 1/2-inch mini-

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g . 4 3 2.2 Exposed Cceduit l

3.2.2.1 Exposed ccaduits anall be run in straight lines paral-1el to column lines, walls, or beams. 11bere conduits

! g are grouped, the bends and fittings shall be installed

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• Pr***** *a ar**r2r ********* * "a=**** **rr "-"5 E or crossing shall be avoided. 1 I 3 2.2.2 Supports for straight runs of exposed rigid metal con-duit shall not exceed W =avi== distances listed in the NEC for systens made up with threaded couplings.

Im seissio Category I structures, exposed conduits shall be supported as defined on design documents.  :

(Ref 4TA056 series drawings). I I 3 2.2.3 Malleable iron 1-hole pipe straps, clasps, U-bolts, hangers, or elose bracket-type pipe supports may be used. pipe backspacers should be used for the 1-hole I malleable iron pipe supports where it is desired to bold a.eceduit run away from the surface to aliminate l

l offsetting the oceduit at the fittings. l 3 2.2.4 In nonseismic structures, galvanised steel members may be drilled or punched for conduit supporting bolts l I provided the holes are imunediately coated with sine-dust sinc-oxide paint (Federsi 8pecification Tf-F-6418) and galvanised or rust-reeleting bolts are used.

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f Threaded stad bolts, Nelsea stud anchors, or equivalent, I

I may be used lastead of Brilling or panching steel members. .

3.2.2 5 In moist locaticos and in locations where appearmace is '

of importance, precautions shall be taken, such as by use of strap-type wreaah== or equivalent means, to I avoid injuring the salvanised costlag or surfsee of l 2

stafatess steel ecaduit. ,

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l 3.2.3 anbedded conduit I 3.2 3 1 A mini == 2-inch clearance dall be maintained bet-ween oceduits embedded in poured ocaarete walls or floor slabs, except that detailed design dimensloos shall be adhered to adjacent to conduit terminations, I etc., where area is restricted.

Conduits and conduit sleeves, when located in a bank or I group form in a wall pour, any be adjusted as required to line up the bottom outside edge of the == allee sised conduit with the bottom outside edge of the largeet

,4 I conduit in the group in order to costiane the gueup run on a common exposed support.

• Likewise, grouped conduits in a floor or ceiling slab I may be shifted enough to take advantage of a econom exposed well or column support. Embedded oceduit runs shall terminate within 11/2 the naminal diameter of the conduit being installed, unless the above ezcepticas apply.

I Conduits anbedded la switchyards and transformer yards shall malatain a 1-inch minim elearance between oon-d dts.

3232 In switchyards and transformer yards all single eco-duit or groups of conduits shall be encased in ecocrete

• with the outer coverage a mini === of 2-1/2 inches.

3233 tabere aluminus or acanetallie plastie eoaduits are embedded la concrete, extreme care shall be taken to 4

I anchor this conduit so that it will at,t be floated when the ecoerete is placed. .

3 2.3.h habedded conduit shall be rigidly supported to with=

I stand concrete vibrators or batches of mass concrete placements.

3 2 3.5 In supporting -WAmA steel, mitmime or plastie com-duit, extreme care shall be taken to avoid damage to the surface of the conduit it welding or brasing is l

I used near the conduit. In no case shall the eenduit be welded or brased to the support. Bonnotallie plastle conduit in duct runs shall act be supported hr reia.

l forcing steel forming closed asseatie loops 3 preformed

plastie spacers shall be used. ' .;

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Page 7 of 16 new. o 3.2.3.6 concrete curbs shall be provided where specified on design pavject drawings.

3237 811p joints shall be installed where enhedded conduits cross expansion or contraction joints in accordance with electrical standard drawing SD-E1.3.1, as defined and located en design drawings of the respective doisgn project.

3 2.3.8 h rever slip joints are used, suitable bonding in ac- t cordance with electrical standard drawing SD-E13.1.1 I shall be provided around the joint to ensure a continuous ground circuit. h re use of expansion sad deflection-type fittings (see 8D-E13.1.1) are defined in design l

l drawings, the manufacturer's instructions shall be fol- '

loved in making ground connections.

3.2.3 9 All embedded conduits turning out of poured concrete I shall terminate with a standard coupling flush with the surface of concrete unless otherwise specified on design dravings. Couplings shall be plugged pending I 3.2.3.10 In duct runs the metallic cunduit shall be p ounded at each manhole or hanAhelg gy bygging the ground Vire to I the top of the conduit coupling or hr using grounding bushings.

3.2.4 Rigid Metal Conduit 3.2.4.1 General

a. Metallic conduit systems, whether anbedded or exposed, shall be installed in accordance with

• those portions of the NEC ensuring that the sys-I tems will be adequately grounded and electrically continuous to function as the equipment grounding conductor. When boxes do not have throeded hubs I or bosses (or as in section 3.3.13), conduits shall be securely fastened to bozos and cabinets, each with a locknut and a bushing inside the box and a locknut outside. The conduits shall be of I such length that when the Mahf== are screwed tight against the ends of the conduits, no ap-

• preciable space will be left between the bashings I and the locknuts. The lochauts shall be sufficiently tightened against the box to avoid hotspots or sparking durirs fault conditions, but without deforming the box.

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I b. Phanian threads shall met be used on rigid metal conduit for oonaaetion at co W . .

- j Welded or brased grounds on conduit rur.s aball be I e.

done on the top of couplings only, and extreme care shall be taken to. avoid lajury to the inner surface of the conduit by ezeessive heating. h I welded or brased joint shall be coated with asphaltten (e.g., Koppers Bitunastie Jet-8et Primer), .'

or equivalent.

, d. Standard-radius field beads or manufacturer's elbows are generally to be used for metal eceduits. l but speelal long-radius beads shall be used where-I ever speettically called for on the design drawings.

h long-radius beads shall have radii as large as l

pigsteal conditions will perudt, but sever less I

• than seven times the ma=ia=1 diameter of.the con-duit. Short radius elbows shall be used only where specifically called for on the drawings.

j 5 e. Field beads for rigid metal conduit shall be ande  !

such that the internal diameter of the ocaduit is not materially chmaged and the protective coating I on the inside and the outside of the condait is mot taJured. m wads shair w em of hinks, indentations, or flattened surfaces. Beat shall j

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not be applied la anklag any meta 111e conduit i beed. (see section 3.2 5.4 for fia14 '

beads for namnetallie conduit.)

, f. Rigid conduits that are 3 feet or less in length -

and that are lastalled vertically without bands I

between the top of motor control centers and cable I trays in Class I buildings aar be supported in the  !

following amaner l I 1. Conduits shall be attached to the top of the board with lockauts.

I 2. P-1001A Unistrut shall be run the length of the board weide the coadmits and shall w bolted to struestral members of the hard at each and and at each panel Joint with 3/8-l I , inch hits (length as required). Spacers shall be used to raise tw naistrat aheve the top of the board suffielentIT to elser the

. locknuts allowing the Unistrut to fit flush assiast the conduit. .i

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3. Each -Anit shall be attached to the Unistrut with Unistrat pipe strepe. If conduit a14 ta===t is such that the thistrat and oceduit are l

I not in oostaat then spacers shall be used to make a rigid ocenestion.

I 4. Conduits shall not be attached to cable trays.

Sufficient slack shall be left in cables to allow 1-inch movement in all directions bet- -

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ween conduits and trays.

Motor control centers with conduits that are greater than 3 feet in length require eonduit sup-I ports as shows on mechsalsal seisnie support drawings (b'** series) for ooeduit or as speelfied on structurar si,wl drawings. For these longer I runs, a length of flexible oceduit is required as acted on eooduit drawings. .

The ladividual panels in some boards have large openings on the top that do not permit the use of lockauts for attachlag conduits to the panel.

F1001A or F1000 Gaistrut bolted to panel strue.

tural members any be used as a point of attachment I~ for conduits.

Conduits entering the top of electrical boards in I Class I buildings shall not be installed in a man-aer that results la a rigid tie between the top of I tlie board and the cable trays or the buildlag. The materials, bolts, etc., used shall conform to the requirements listed as rt abanical drawings 47AoS6-1.

• 3.2.4.2 Steel conduit and Intermediate Metal Conduit (INC) steel and INC conduit Jolate and coneestions shall be made water-tight and rustproof hr means of the app 11-I cation of a thread cospound which will act insulate the jolat. Each field-cut thread shall be cleaned,to remove the cutting oil before the compound is applied.

I An electrically conductive and antiseine ocupoemd ter metal surfaces such as Em '

Thomas sad Betts Company)pr-Shield (av=fiah1=

85-30 (avat1=h1= fras from Jet-I Lube. Imeorporated). or equivalent. shall be applied to cair the male eendait threads to preent the obetrue-tion of the reneway.

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8 nsAI-4 Page 10 of 16

g Rev. 3

! g 3.2.4.3 Aluminum Ceeduit l a. Rigid alumnises coedelt installed eetdeers er in wet locations shall preferably be provided with alumiasm fittings and supperta. Calvanised fittings and supports may be used la special cases. Care most be takes to prevent the contact of al=1- coedmit with cerrosive asterials is I places where meisture cas accumslate.

Strap-type wreeches er equivalent shall be used I b.

to avoid scratchlag and geoging the alustame coeduit.

I ,

c. Alumismo conduit joints at coup 11 ass er fittings tend to seine maless treated. Use a commerical compeemd such as Aleca Thread Zabricaat. satis-factory misteres such as stac dust and vaseline I. (50-60 by weight), or a besvy cup grosse contain-ins 25 percent graphite may be used. Alammia==

threads shall est be coated with red lead er other 5 lead 6 , M .

d. Standsed boeders may be used for alusians conduit except that IIrf beeders shall be used for conomit 8 1 inch and below. Use as Eiff boeder 1/4-inch larger than the conduit sise, i.e., 1-1/4 inches for 1-inch rigid, I inch for 3/4-inch rigid. -

e. Aluminum coeduit shall be grounded by insettlag a salvanised steel coupling in the ras, braalas the I ground wire to the top of the couplias, and care-fully coating the joint with asphaltua. The design drawings will show gromeding when used for a single phase of a 3 phase circuit.

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f. Risid steel conduit and associated fittlags may be moed as a sabetitute for al==4=== coedmit and 8 f fittings.

3 Aluminem coeduit, coedmit fittings, or components shall met be need inside the reacter building I primary containment.

3.2.5 Plar. tic Ceedait r IIOTE: Plastic conduit coetaining chlorideo is met allowed -

, la the powerheene, ,

i 3.2.5.1 To prevent werplas dettaa storage, plastic coa- -

duit shall be stacked es a seeeth, flat surface in sa area met directly espeeed to the reys of the 8 see. Spacers of 1-inch soft wood, appremiastely -

2 feet apart, should be used between layers of

• coeduit. Noamfacturer's shipping bundles may aise I be used for direct storage. i

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. Fase 11 of 16 Rev. 2 3.2.5.2 Where Plastic conduits are encased in concrete (such as in duct banks between buildings). .he ]

conduits shall be anchored with preformed ;Lastic spacers prior to concrete placement. The :se-duits and spacers shall be located as shotc os 8 design drawings.  ;

3.2.5.3 Plastic conduit may be cut with a hacksaw. After 5 cutting, ends shall be trimmed sad rough efges smoothed. Area to be solvent welded (outside of conduit and icoide of coupling or fitting) shall ...-

.I be free from dust, dirt., grease, and mois- :are.

• Use methyl ethyl ketone (ISI) for cleasing.

Polyvinyl chloride (PVC) solvent shall be 1 rushed liberally on the end of the conduit and 1 side the 8 fitting or coupling when asking a joint. After fitting has been pushed on, it should be tvisted E one-fourth turn to spread the solvent eve ~7 E canti=== ** **2d J ai=* '*r 25 =*c'=da ** 22**

conduit does set push out of fitting.

3.2.5.4 Bends for noneetallic conduit are usually ;st--

5 chased as required for the conduit systas. but for special cases may be made in the field. Iz-treme caution should be observed when any source of heat 5 is near plastic conduit. Field bending cas be accomplished by the use of a " hot air-cold str" blower; a head-type dryer is recommended 17 the I 3.2.6 manufacturers.

Flexible Conduit Flexible conduit shall allow for relative displacese:t 4 of Class 1E equipment or components and a rigid cond:it g

system. After installation, the flexible conduit sh:ald 4

gi not be tight or stretched between couplings or fitti:ss.

4 Fittings used on flexible conduit shall be installed

, 4 per the manufacturers instructions.

1 4 3.2.6.1 Flexible conduit connected to floor mountei f equipment shall be installed in accordance t with the requirements st.ated in Figure 1.

t 3.2.6.2 Flexible conduit connected to mechaalcal -

$ systems subject to thermal or similar move-l 5 $

meat shall be installed in accordance with the requirements stated in Figure 2. '

t 3.2.6.3 Follow dimensiosa given la Table A for deter-t mining the bend radius for flexible conduit

% for equipment is par. 3.2.6.1 above and '." l lg Y t

drawing 47A056-39 for equipment la par.  ?, f I W 3.2.6.2 above. , l i

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1srAI-6 I

• Page 12 of 16 Rev. 2 4 3.2.6.4 Install flexible conduit between flush and t recessed lighting fixtures to rigid conduit I 4h systems when so indicated on design drawings.

& 3.2.6.5 Flexible conduit lengths shall be installed

+ as near Class 1E equipment as practicable.

I 3.3 Conduit somes ,

l 3.3.2 General . ..

3.3.1.1 Where large boxes are embedded, they shall be properly

. braced on the inside so that concrete pincement will not deflect them. Threaded holes in box frames shall 5 be protected from injury.

• 3.3.1.2 Outlet boxes in architectural tile or masonry unit 8 walls shall be installed strictly in accordance with design drawings and for best appearance. .

3.3.1.3 Where water-tight conduit connections to junction boxes without threaded hubs or bosses are required (see elect-rical standard drawing 3D-E13.6.5), Appletoa type EUs conduit hubs, or equivalent, may be used is place I of welded hubs.

3.3.1.4 Exposed noncurrent-carrying metal parts of fized equip-8 ment and boxes shall be grounded. Equipment not secured

, to, and in metallic contact with, grounded structursi steel shall be connected to the grounding system, whom 5 andicated on the detailed design drawings, by brasing the grounding cable to the equipment and thes carefully coating the joint with asphaltum, or equivalent.

3.3.1.5 For general information concerning boxes, see electrical standard drawing 3D-E13.6.3.

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3 3.2 Painting '

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Field fr.bricated surface-mounted boxes shall be painted, inside and outside, immediately after fabrication. Field fabricated ,

flush-mounted boxes shall be painted on the inside and the I exposed parts only. Primer paints shall be lead free. Zinc chromate primer (Federal Specification TT-P-57. Type II) is recommended for black sheet steel. Finish coats for exposed I parts shall harmonise with the general painting scheme about the plant.

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3.3 3 Seismic Mounting '

I Surface-mounted conduit boxes located in seismic Category I i structures shall be seismically mounted. Where the mounting l I surface is poured concrete, boxes shall be atta'ched to embedded steel plates or aduated to the concrete with bolt anchors as shown on equipment seismic support design drawings of the I respective design project. Beismic mounting of flush or surface boxes to masonry walls shall be in accordance with specific design details.

3.3.h Identification Marking Junction boxes and/or pull boxes which are assigned junction I box numbers and nameplate numbers on design drawings shall be identified by attaching the respective nameplate to its box as described in electrical standard drawing DS-E1.2.2, It I

shall be permissitte to use 3M Scotch pressure-sensitive foam 4 tapes for attaching nameplates. '

Junction boxes and/or pull boxes which have assigned box numbers, t

l 85 but no assigned nameplate numbers on design drawings, shall be l marked with the applicable color scheme defined for the respective -

nuclear plant (see electrical design standard DS-E1.2.2). The 3 size lettering shall be determined by the Cognizant Engineer 3 depending on the box size. The use of self-sticking %nar markers I

' (e.g., AMP Special Industries or LEM Products. Incorporated),

g self-adhesive Polyester markers '(e.g. , W.H. Brady Company), or E **"iv'2*a*. 2' = **2***2' - """ ' ' *

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M&AI-6 I Page 14 of 16 Rev. 4 4.0 INSPECTION REQUIREMENTS -

QA has the responsibility to ensure that conduits and conduit boxes designated for Claen 'IE cables (divisfors of separation), have been installed according to I the design documents in the workplan and this instruction. All other conduits and boxes may be inspected by the Cognizant Engineer.

Installed conduit systems and conduit boxes shall be inspected for the following:

A. Size, type and location B. Identification C. Grounds .

D. Conduit fittings I E.

F.

Flexible conduit installation Burrs and sharp edges at terminations G. Physical separation N. Conduit hangers I. Conduit terminations ,

f J. Straps properly tightened NOTE: Conduit box size, type, and location (where applicable) shall be verified and documented when inspection is performed on each conduit which terminates in the box.

, Acceptance Criteria -

A. Size, type, and location shall conform to the EN DES approved drawing in the workplan. 1 I NOTE: Rigid steel conduit may be substituted for aluminum conduit in the event of a shortage of aluminum conduit, if care is exercised in the selection of supports.

B. Identification i

1 I Conduit shall be tagged per TVA Standard Drawing SD-E-15.3.4 of General construction, Specification G-40.

Conduit boxes shall be labeled with the assigned nameplate and Junction box (identification number JB) specified on the applicable EN DES drawing. When no nameplate is assigned, the box shall be identified by the specified JB number with mylar self-sticking tape (or equal) in accordance with TVA Standard Drawing DS-E1.2.2.

NOTE: Temporary identification methods for conduit boxes are authorized pending receipt of permanent labels.

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NSAI-6 I ,

. Page 15 of 16 Rev. 2 C. Grounds e

8 1. Conduit shall be grounded at least once by one of the followings t a. Securing to building steel of embedded plate; b, securing to a grounded conduit support;

c. Securing to a grounded junction box;

d. Use of U-bolt grounding clamps, grounding straps, or grou: ding * ..e bushing secured to a ground conductor. ' .

2. Conduit boxes shall be grounded at least once by cas of the following:

a. Securing to a building steel or embedded plate; l

b. Securing to a grounded conduit (If a conduit is used to 3:ound

~8 a conduit box, the box shall not be used as a ground for any of the other conduits terninsting in it) l l c. Using a Kearney stud connector or compression lug, and bolting w an external ground to the box.

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NOTE: Cable tray grounds may be used as a grounding connection '

8 j when no other mesna are available.

D. Conduit Fittings No threadless fittings shall be used in a conduit run in a seismic class I buildios.

E E. Flexible Conduit Installation

1. The flexible conduit portion of an exposed conduit run shall be 8& w t

" installed and supported in accordance with the requistments of the applicable 47A056 series drawings. The bend radius for flexible conduit to mechanical equipment shall be per drawing 47A056-49 Y {

and to floor mounted equipment per Table 1A of this instructics.

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l 2. The end points of flexible conduit may be left free to facilitate cable pulling activities. Proper termination of the flexible :endair, I I' ' shall be verified after the cable is pulled. l

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i 3 # 3. Flexible conduit to floor monated equipment shall meet requirensats g y of Figure 1.

l 4.

p Flexible conduit to mechanical systems subject to thermal etc. nove- '

( t ment shall meet the requirements of Figure 2.

F.' surre and sharp Edges Conduit and conduit boxes shall be free from burrs, cuts, sharp edges, rough surfaces, or any other defects that may be detrimental to the cable jacket.

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4 Page 16 of 16 .

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• Rev. 4 .

G. Physical Separation -

Conduit and conduit boxes shall conform to the physical spearation require-

• ments specified on EN DES drawings.

H. Conduit Hangers

1. Ir. seismic Class I building, hangers shall be spaced as follows:

5 ft. (max.) - 1 ft. (min.) for 3/4" and under 10 ft. (max.) - 1 ft. (mi'n.) for 1" and above

2. Four inch or smaller 1-hole pipe straps and '4-inch or smaller conduit boxes, shall be installed in accordance with the requirements of I drawings 47A056-2 and -76 respectively. Inspection shall be ac-coup 11shed with the related conduit and documented by the inspector's signature and data on the inspection sheet. *

3. In non-seismic areas, conduit supports shall be spated in accordance with the National Electric Code (NEC) and documented by the inspector's -

signature and date on the inspection sheet.

I I. Termination I 1. Conduit terminating in a conduit box or cabinet that do not have treaded hubs or bosses shall be secured using a locknut and a bushing on the inside and a locknut on the outside. In wet locations conduit hubs may be used.

NOTE: If there is insufficient space for bushing installation, con-duit ends may be rounded to appr'oximately 1/16 inch radius.

2. A bushing or chase nipple shall be installed when a conduit termin-ates beneath a cabinel or board.

Y J. Straps Properly Tightened

1. Bolts without washers shall show no visible evidence of slack and f the bolt shall be verified to be, as a minimum, handtight.

I$y 2. Bolts with flat washers shall be verified to be, as a minimum, handtight and the washer shall exhibit no ability to be turned ,

I$Y 3.

by hand twisting.

Bolts with lockwashers shall exhibit lockwashers. , ,

I Documentation .

e Conditions encountered that were not anticipated and-any NCR's, TCR's p design deviations, etc. shall be recorded in the " Remarks" section of the inspectionssheet. -This -

I inspection shall be documented on the inspection sheet as shown on Attachment A or by signature in the work instructions of the workplan.

I The identification of'the conduit boxes included 'in this inspection shall be re-corded in the " Remarks" section of the inspection sheet or near the signoff in the work instructions.

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M&AI-6 Data Sheet Appendix A Work Plan /NR .

Page 1 of 1 Page of 4

Rev. 4 .

-1 (1) QA Inspector required on CSSC equipment only, l

l l EXPOSED CONDUIT AND JUNCTION BOX INSPECTION SHEET Ref. Drawings:

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{ J-Box #

Acceptable 4

! Size. Type Location ..

Routing - @f, i f

Correct Coupling b" -

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1 oo Identified Properly * *

, Burrs, Sharp Edges C>d j Removed * ,.i 4

] Separation Requirements :1 net @g

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4 Ranger Spacing Acceptable

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h Straps Properly Tightened

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i Remarks:

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.i y , 'O O O 8 3 4^ O T 9![i 1 NNYktf'h SQNP MSAI-6 figure 1 I Page 1 of 1 Rev. 2 FIGURE 1 FLOOR HOUNTED EQUIPMENT l'sintows dist,lacament haes a farce is applied at stop41st tot. ass tae cowslergsa 5 /

r*. 4:stJ steel or titer =:ediate ., Rigid steel er latermediate m, /

'* # 4 ts . c w. tu t t  ! cetal conduit . - --. ,

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~3 4 Tes of fleer as.mtsa Class 1[ ,,

. Class 11 eqatpeJat equt;r.dat . .,, , _ f g --

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Of fi" te, efssteet c*t NOTES:

1. Een conduits connect to the top of floor mounted, Class IE equipment.

5 an 18-inch minimum length of flexible conduit shall be used to connec.

between the rigid conduit and the equipment. As a general rule, the flexible conduit installation should contain enough slack to form a minimum 1-inch loop at midpoint betreen couplings, or to permit dis-8 placement af a minimum 1-inch betwe.en center lines of couplings.

Maximum AstF. of flexible conduit is 72" except as noted on design drawings.

2. Wen conduits connect to the bottom of floor mounted Class IE equip-ment, such as control panels, the minimum length of flexible conduit 5 should be 18 inches, but may be less where physical limitations prevent or make it impractical.

! 3. Men conduits connected to the sides of floor mounted, Class IE l equipment such as motors, the flexible conduit shall, as a minimum, he l long enough to accomodate its minimum bend radius given in Table 1A.

4. Conduit connections to cable trays should be avoided; however, if conduits are connected to seismic Category I cable trays, an 18-inch

, minimum length of flexible conduit shall be installed as in Note 1 l

above.

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Figure 2 Fase 1 of 1 Rev. 2 FIGURE 2 NECMANICAL SYSTF218 SUBJECT TO MOVEMErr I ,4.

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1. The minimum length of esposed flexible conduit between couplings shall be as specified in the table below for the size conduit being used.

I Flexible Metal Minimum Length Dimensions Minimum Offset I Conduit--Nominal ID Size (Inches) (Note 1)

(".xposad Litween Couplians)

I,oop or Displacement I 1 1/2 3/4 18 24 30 6

4.5 7.5 1-1/2 32 I 2 2-1/2 3

36 48 60 12 15 3

9 4 72 (+2, -0 Tolerance) 28

2. 1he minimum loop, offset or diJylacement dimension shall be as specified in the above table.

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M&AI-6 I -

- Table 1 Page 1 of 1 Rev. 2 Table 1 MINIifM BEND RADIUS FOR F1IIIBLE CONDUIT I A. To floor mounted equipment Minimus Bendina Radius (Inches)

I Stainless Steel Flexible Metal I,iquidtight Flexible With Flexible --

Conduit--Wceinal ~ Synthetic Jacket--Nimi- Minimum Centerline ID Size (Inches) Inside Bend Radius (Nete 1) Bend Radius (Note 1) i II I 1/2 3/4 1

3.5 5

6 3

5 6.5

'! l 1-1/2 6.5 .9.5 I)

I 2 2-1/2 3

7 9.5 11.5 11 12.5 14.5 jl i.

I 4 14 22 5 20 29 ll 6 30 35 I Notes 1. Plus allowing for straight run sections needed at the rigid connector (s).

B. To mechanical equipment requiring thermal er similar movement; refer to drawing 47A056-89.

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APPENDIX C ,

INFORMAL PORC REVIEW TRAN8MITIAL Instruction No: MAAT.ll Ier. No: 11

• FABRICATION, INSTALIATION, AND DOCUMENTATION OF SEISMIC Instruction Title! SUPPORTS ATTAf NFD TO MFf MMf f- ('ATFfnBY T MTRffCTTMFC

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PLEASE COMPLETE YOUR REVIEW WITRIN 2 WOREING DATS.

THIS PROCEDURE SHOULD BE P0tc APP BT .

Review must be completed in the time indicated. . Attach comments by marking ..

up the instruction or attaching additional sheets. The originator of each ,.

comment should be identified by his initials.

REVIEVER DATE EEVIEWED _ SIGNED 'i

1. Operations Supervisor /s -/O-IS / ML/

2 Nechanical Mtn Supervisor G-17.-W 7/M

3. Electrical Ntn Supervisor /. /n/ss 72E

4. Instrument Mtn Supervisor  ? J/ # fIS' xx_el- b--

5. Health Physics Sup r i o 7/9/ K A%" Nr----

6. QA Statt Superviso ,

R'M -P C h%

7. Engineering Group Supervisor ' f/5/& 7/// %IA fMM

8. Safety Engineering Staff NTA . -

9. Plant Supt. (Oper/Nta) 8/4 W

10. Plant Manager 8/S @

11. fY)tSe8PfleAt*toA13 to resolve C comments and return to WPU

--M,M -

IfW Originating per sor Date

12. . WPU for incorporating comments. ,

/ [/f-f[ ,

nitials Date

___...________..__.....____.... _______________. ..__________ .....______ g 2

13. IYltsf-} l Mit'at f 6 AS t final copy for FORMAL P0tc.

M J 8 -I- k g OriginatingSupervis[ Date "

14. Editorial Clerk review b' / f 6 Inkips Date -

15. QA Staff to sign coversheet (AIs only) /> /

Initials Date IEMARKS/ REASON FOR REVISION: -

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. . .0 0 0 8 3 et' Stendard O598

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8 Practics - .*

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, , ATTACIO!ENT 1 SQA119 N

Unraviewed Safety QusstiDn Determinspion

t. " wCE etsCa:PTIO3 (ifCLUCC TACF, INSTRLCTIOf CR SPECIAL TEST $2314e ggyj,gg): _

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5. OCCX SLOCXCS) SELGd TD DE50tlet NMT*l5 SE!NG EVALUATE 3. #DtE TMN DE BLOCK MT St.OEDED YES . . 40 -

1. FACILITY OWCE PACILITY DE50tf 8ED IN M F54tf C

. 2. EPROCEDURE OWCE PROCEDutt DESOt! BED.IN M F5Mtf Q @

,.. 3. C TEST SPECIAL TEST /EXPERIMT (A TEST g CESctigED IN M F14t) O O h

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se. ACTivlTY SPECIAL ACT!v!TY, Aeovet. CofFIGULATICN, ETC., WICH !s DEDTD 70 PEED A U590 O

• IF ## SLDotS OtCXED "YES", TM COft2TE SECTION C.

• :. ustEvitwo sArETy ottsTIDs DETERMIMTICH **

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EXPtAMT!CH:

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I (3) IS DC *WVlu 0F 5AFETY As otripco IN M SdSIS O' ANr TEoNgCAL SPECIFICATIO, REDUCEDT TES W MQ ,

EXPL# MTIOd:

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