ML20215N359
| ML20215N359 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 07/08/1982 |
| From: | Cowan L, Maxwell D TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20215N324 | List: |
| References | |
| M&AI-6, NUDOCS 8611050284 | |
| Download: ML20215N359 (8) | |
Text
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, se m *.. M se. ,w,= J Pwe Plant Superiatendent Assistaat Pwr Plant Sept. Oper.)
MODIFICATIONS AND ADDITIONS 10 Assistaat Pwr Plant Sept. (Estat.)
INSTRUCTION Assistant Pwr Plant Sept. (ISS)
Administrative Supervisor M&AI-6 1C Meistenance Supervisor (N)
I INSTALIATION OF CONDUIT AND JUNerION 30x3s 1C 1C Assistaat Meistamance Superrisor Of)
Meistessace Supervisor (E)
Assistaat Maintammace Supervisor CE) g Maintenance Supervisor (I)
' J Engineering Supervisor Operatiosa Supervisor l
Quality Assurance Superviser I
1C f - ;_ l Nealth Physics Superviser l Public Safety Services Supv. I Chief Storekeeper '
I 1C Preop Test Progree coordinator Ontage Director ch==ical Engineer (Engineering)
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Radiochen Emboratory i 5 Instrument Shop Reactor Engineer (Eagineeri:3)
Iastrument Engineer DIsist. I)
I Mechanical Engineer (Eas1=eertag)
Plant Services Supervisor Trainias Center Coordiaster I Prepared By:
Revised By:
lyna Cowse D. Neuwell Public Safety Services - SIP Shift Eatiaeer's Office Unit Control Room
. Nealth Physics Laboratory I Submitted By: J. Robinaos 10 Nucle Docuneat Control Unit Supervisor 15 Fwr Plant Superintendest, L3EP f Pwr Plant Superintendent, IIIP I PORC Reviews- 7 h Pwr Plaat Superintendsat IIIP
'3sta 10 MEB-K Approved By: .j g
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--g* 1C Resident MRC Iaspector - SIP NERS-K I Fwe Pit Superintendent Technical Support Caster Unit Control Room #2 Date Approved: b Compliance Section Staff 5::pervisor I I i IC Aest. Outage Director 10 J.E. Gibbe. Outage Director. WBNP I The current revision level of this instruction ist 2 .
I Reason for current revision (include all tamporary change muebers) Revised i=
accordases with Tamperary N--e No.82-897. Pt3C LAJ 7/7/82.
The last page of this instructioa*is Number 21 .
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Eistory of Revistees Rev. No. Date Revised Pease Rey, We, Date Review y.m 0 11/8/79 All 1 11/19/81 13 Revised 12.13,16,17, .
2 Added 19.20.21 B
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- a. nigid si-i== eonduit installed outdoors or in vet loestions shall preferably be provided with altasinum fittings and supports. Galvanised I ,
fittings and supports any be used in special cases. Care must be taken to prevent the contact of alimime hit with corrosive materials in places where moisture can accumalate. -
- b. Strap-type wrenches or equivalent shall be used .
to avoid ser=+*hi== and gouging the altamintas conduit. -
c.- Altsaintan conduit joints at coun'i--= or fittings I tend to seize unless treated. Use a comunerical cWy -d such as Aloca Thread Iaahricant. Satis-factory mixtures such as sinc dust and vaseline (50-60 by weight), or a heavy cup grease contain-I ing 25 percent graphite may be used. Aluminun threads shall not be coated with red lead or other '
lead compounds.
I d. Standard benders may be used for aluminum conduit except that BEF benders shall be used for conduit
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I 1 inch and below. Use an Brf bender 1/h-inch larger than the conduit sise, i.e.,1-1/% inches
- for 1minch rigid, 1 inch for 3/4-inch rigid. . ,
- e. Altaminum conduit shall be grounded by inserting' a -
l galvanised steel = ?14== in the run, brasing the 9 ground wire to the top of the ~JaT14 ==, and care-I fully coating the joint with asphaltua. The design drawings will show grounding when used for
- a single phase of a 3-phase circuit.
- g. Altmi== conduit, oceduf t fittings, or components .'
shall not be used inside the reactor h=i1di==
1 I 3.2 5 Plastic Conduit -
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- NorI: Plastic conduit eco+= imine chlorides is not allowed in the powerhouse.
7; Te prevent warping during storage, plastic com-I 3251 duit shall be stacked on a smooth, flat surface in an area not directly exposed to the rays of the sun. Spacers of 1-inch soft wood, approximately 2 feet apart, should be used between layers of -
I conduit. Mamafecturer's shipping bundles any also 1 be used for direct storage. ,',
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Sequoyah Nuclear Plant V J % STRIBUTION "'W 't ys Q4 s
1C Plant Master Fil R - rwr Plant Superint e t Assistant Pwr Plant Sept. (Oper.)
MODIFICATIONS AND ADDITIONS 1U Assistant Pwr Plant Supt. (Maint.)
INSTRUCTION Assistant Pwr Plant Supt. (H&S)
Administrative Supervisor M&AI-6 1C Maintenance Supervisor (M)
I INSTALLATION OF CONDUIT AND JUNCTION BOXES IC IC Assistant Maintenance Supervisor (M)
Maintenance Supervisor (E)
Assistant Maintenance Supervisor (E) l
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Haintenance Supervisor (I)
I Results Supervisor ,
Operations Supervisor 1 1C Quality Assurance Supervisor I Health Physics Supervisor Public Safety Services Supv.
Chief Storekeeper 1
g Preop Test Program Coordinator 3 1C Outage Director I Chemical Engineer (Results)
Radioches Laboratory Instrument Shop Reactor Engineer (Results)
Instrument Engineer (Maint. I)
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Mechanical Engineer (Results)-
Plant Services Supervisor Training Center Coordinator I Prepared By:
Revised By:
Lynn Cowan Jan Kile Public Safety Services - SNP Shift Engineer's Office
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Unit Control Roon
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Health Physics Laboratory I Submitted By:
Supervisor IU IU Nucir Document Control Unit Pwr Plant Superintendent, WBNP Pwr Plant Superintendent, BTNP.
I PORC Review: ///////
'Da te' IU Pwe Plant. Superintendent, BENP NEB-K Resident NRC Idspector - SNP Approved By: CE*ve Ar /) *M IC NSRS-K i.-
-I Pw Plt Superintend (at Technical Support Center
,j , Unit Control Room #2 Date Approved: //////// Compliance Section Staff Supervisor I / '
IC IU Asst. Outage Director J.E. Gibbs, Outage Director, WBNP Rev. No. Date Revised Pages Rev. No. Date Revised Pages O 11/8/79 All I 1 It-tg.it 18 w / .
The last page of this instruction is Number 18 .
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3.2.5 2 Where Plastic conduits are encased in concrete ,
(such as in duct banks between ba4Wara), the ,
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conduits shall be anchored with preformed plastic spacers prior to concrete placement. The con- ,
duits and spacers shall be located as shown on design drawings. ,
3.2.5 3 Plastic conduit may be cut with a hacksaw. After cutting, ends shall be trimmed and rough edges I smoothed. Area to be solvent velded (outside of conduit and inside of coupling or fitting) shall be free from dust, dirt, grease, and moisture, Use methyl ethyl ketone (!EK) for cleaning.
' Polyvinyl chloride (PVC) solvent shall be brushed
.- liberally on the end of the conduit and inside the g fitting or coupling when making a joint. After 3 fitting has been pushed on, it should be twisted one-fourth turn to spread the solvent evenly. ,
Continue to hold joint for 15 seconds so that I 3 2.5.4 conduit does not push out of fitting.
Bends for nonmetallic conduit are usually pur-I chased as required for the conduit system, but for special cases may be made in the field. Extreme caution should be observed when any source of heat is near plastic conduit. Field bending can be i
I accomplished by the use of a " hot air-cold air" blower; a hand-type dryer is recommended by the ,
4 manufacturers.
3 2.6 Flexible conduit '
l Flexible conduit, as previously described in~section 2.3, l
shall be installed in lengths not exceeding- 6 feet, except .
as noted on design drawings, to connect the rigid conduit system to all motor, valve, and other equipment conduit I boxes where flexible connections are required. It shall also be used for connecting flush and recessed lighting fixtures to rigid conduit systems when so indicated on design drawings.
Unless otherwise noted on the design drawings, an 18-inch I minimum length of ~ flexible conduit (exposed between coup-lings) shall be used to connect rigid conduit to the top of all seismically qualified Class 1E electrical boards i and panels which are not mounted on walls. Where physical I limitations prevent the installation of the 18-inch min-imum length of flexible conduit, the cognizant engineer shall be notified for resolution (by established procedures) ~i,I!
3 with IN DES.
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- 3.2.6 Flexible Conduit y I Exposed flexible conduit that connects embedded conduit in a concrett slab to the bottom of Class lE .equipsest that has rigid seismic supports may be less than an 18-inch le gth but should be I as long as practicable to allow for displacement of equipment.
during an earthquake.
I Flexible conduit lengths shall be installed as sear the Class lE equipment as practicable.
Conduit connections to cable trays should be avsided; however, if conduit is connected to cable trays in a seismidally qualified structure, an 18-inch minimum length of flexible conduit (exposed between couplings), unless otherwise noted on the design drawings, shall be used. ,
3.3 Conduit Boxes 3 3.1 General 3.3.1.1 Where large boxes are embedded, they nhall be properly I braced on the inside so that concrete placement vill not deflect them. Threaded holes in box frames shall be protected from injury.
3.3.1.2 outlet boxes in architectural tile or masonry unit valls shall be installed strictly in hecordance 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 rdquired (see I elect-rical standard drawing SD-E13.6 5), Appleton type HUB conduit hubs, or equivalent, may be used in place of velded hubs.
33.1.14 ' Exposed noncurrent-carrying metal parts of fixed equip-ment and boxes shall be grounded. Equipment not secured to, and in metallic contact with, grotnded structural I. steel shall be connected to the grounding system, when indicated on the detailed design drawings, by braz,ing the grounding cable to the equipment and then carefully
, coating the joint with asphaltum, or equivalent.
3.3.1 5 For general information concerning boxes, see electrical standard drawing 8D-E13.6.3.
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Rev. O C. Grounds
- 1. Conduit shall be grounded at least once by one of the following:
- 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 grounding /
bushing secured to a ground conductor.
- 2. Conduit boxes shall be grounded at least once by one of the following:
- a. Securing to a building steel or embedded plate;
- b. Securing to a grounded conduit (If a conduit is .tsed to ground a conduit box, the box shall not be used as a ground for any of I the other conduits terminatins in it);
Using a Kearney stud connector or compression lug, and bolting c.
an external ground to the box.
NorE: Cable tray grounds may be used as a grounding connection when no other means are available.
D. Conduit Fittings ,
No threadless fittings shall be used in a conduit run in a seismic Class I building. ,
E. Flexible Conduit Installation
- 1. The flexible conduit portion of an exposed conduit run shall be f
installed and supported in accordance with the requirements of drawing h7A056-89
- 2. The end points of flexible conduit may be left free to facilitate cable pulling activities. Proper termination of the flexible conduit shall be verified after the cable is pulled.
F. Burrs 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 I jacket.
G. Physical Separation Conduit and conduit boxes shall conform to the physical spearation require-ments specified on EN DES dravings.
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H. Conduit Hangers
- 1. In seismic Class I building, hangers shan be spaced as fonovs:
5 ft. (max.) - 1 ft. (min.) for 3/4" and under i 10 ft. (max. ) - 1 ft. (min. ) for 1" and above l
- 2. Four inch or sman er 1-hole pipe straps and k-fneh or smaner conduit boxes, shall be installed in accordance with the requirements of -
- i drawings h7A056-2 and -76 respectively. Inspection shan be ae-ccmplished with the related conduit and documented by the inspector's 4 signature and date on the inspection sheet.
- 3. In non-seismic areas, conduit supports shan be spaced in accordance with tha Nationel Electric Code (NEC) and documented by the inspector's signature and date on the inspection sheet.
I. Termination
- 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 I on the inside and a locknut on the outside. In vet incations conduit huba may be used.
NOTE: If there is insufficient space for bushing installation, con-duit ends may be rounded to approximately 1/16 inch radius.
I 2. A bushing or chase nipple shan be installed when a conduit termin-ntes beneath a cabinet.or board.
Documentation Conditions encountered that were not anticipated and any NCR's, FCR's, design deviations,
! etc. shall be recorded in the " Remarks" section of the inspection sheet. This inspection shall be documented on the inspection sheet as shown on Attachment A or by signature in the work instructions of the workplan.
The identification of the conduit boxes included in this inspection shan be re-corded in the " Remarks" section of the inspection sheet or near the signoff in the work instructions.
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