ML19209A358
| ML19209A358 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 08/27/1979 |
| From: | Edwards E BECHTEL GROUP, INC. |
| To: | |
| Shared Package | |
| ML19209A316 | List: |
| References | |
| EFF-790827, NUDOCS 7910030648 | |
| Download: ML19209A358 (11) | |
Text
a UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSIOri BEFORE THE ATOMIC SAFETY AND LICENSING BOARD In the Matter of
)
)
PORTLAND GENERAL ELECTRIC COMPANY,)
Docket No. 50-344 et al.
)
(Control Building
)
Proceeding)
(Trojan Nuclear Plant)
)
)
AFFIDAVIT OF C. W.
EDWARDS CONSOLIDATED INTERVENORS' CONTENTIONS NOS. 2 A AND C.
1.
My name is E. W.
Edward s.
I am employed by Bechtel Power Corporation (Bechtel) as Field Construction Manager in the San Francisco Power Division.
I have been employed in this position since 1977.
My professional qualifications are contained in an attachment to this affidavit.
This affidavit was prepared by me or under my supervision.
2.
I have been involved in the Trojan Plant modification work.since May 1978.
My duties have included responsibility for construction planning, which has consisted of constructi-bility reviews of engineering design, conceptual development of construction methods, scheduling of work sequences and planning of construction activities with Portland General Electric Company (PGE) personnel.
3.
The purpose of this affidavit is to address Consolidated Intervenors' Contentions Nos. 2 a and c, which read:
Licensee has not shown that there will be adequate fire protection at the Trojan plant during modifica-tions in the following areas:
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CI #2A & C Page 2 of 6 E.
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Edwards a) fire protection of cable penetrations c) with respect to welding, particularly in the Cable Spreading Room 4.
This affidavit will describe the fire protection mes-sures to be taken in the vicinity of cable penetratj.ons and in the vicinity of all welding to be done during the modifica-tion program.
5.
The proposed modification work will require some welding and cutting in the vicinity of the ca.les that pass through the Control Building west (R line) wall between the Control Building and the Turbine Buildina.
Arc welding equipment will be used to join the steel plates to be bolted to this wall.
This welding will take place on the west side of the R line wall (in the Turbine Building) in the area bounded by el. 64' and el. 86' and column lines 41 and 47.
Use of this arc weld-ing equipment will produce welding " splatter", which consists cf hot. metal droplets.
In addition, prior to installation of the steel plates approximately two inches must be cut from a steel girder in the Turbine Building facing the R line wall.
The cutting will be done either by electric arc or oxyacetylene torch, and will take place at the beam supporting the floor at elevation 93 ft.
in the Turbine Building, between column lines 41 and 47.
Use of the cutting torch will produce " slag",
which is similar to welding splatter.
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CI #2A & C Page 3 of 6 E.
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Edwards 6.
A " cable penetration" is an opening in a wall, or other structural formation, to allow a cable tray or conduit, both of which contain cables, to pass through.
Certain of the structural formations in the Trojan Control Building, Auxil-iary Building, and Fuel Building Complex (Complex) are tire barriers; that is, one of their purposes is to act as a fire protection barrier to stop fire propagation from one area to another.
A cable penetration through a fire wall requires some additional fire protection to maintain the integrity of the fire barrier.
At the Plant the existing fire protection barriers for the cable penetrations consist of silicone foam that seals the opening.
These fire protection seals meet the requirements of the NRC Operating License.
These seals will not be affected by welding splatter or cutting slag.
- 7. Since the cables are covered with layers of self-e: tin-guishing insulation and jacket material, they will not ignite even if struck by welding splatter or cutting slag.
- However, since such splatter or slag might melt into the insulation and damage the cables, the cable trays will be covered com-pletely by non-combustible fire protective blankets at all times when either welding or cutting is done in this area.
These blankets will be either Claremont Weld Shield style No.
800-24 or Fabri Cote 1584-white.
These blankets will completely protect the cables in the cable trays from any slag or splatter caused by cutting or welding.
Documentation of fire tests on such blankets, which has been previously provided to all parties on March 28, 1979 and August 13, 1979, establishes the acceptability of such blankets.
Such documentation is attached as Attachments 1 and 2 to this affidavit.
BO-1 1 GR A <
CI #2A & C Page 4 of 6 E.
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Edwards 8.
In addition to the non-combustible blankets, other fire protection measures will be taken during the cutting and welding in the vicinity of cable penetrations.
Standard Plant procedures require that, prior to any welding or cutting in the Plant, a " Welding and Cutting Permit" must be requested by the craf tsman performing the work, processed through the appropriate plant procedures, and issued by the cognizant s upe rv iso r.
Such permit will require that before the welding or cutting is begun the welding or cutting equipment must be in good repair, L.y combustible materials in the area must either be moved or adequately 1 otected, and a fire watch must m'
posted.
The fire watch will be provided with extinguishers or fire hos_s, trai,ed in fit e fighting, and knowledgeable in Plant fire protection procedures.
The fire watch Tust remain on station for at least 30 mi.tes after completion of the welding or cutting operation.
9.
Other tasks in the modification work will require lit-tie, if any, additional combustible material in the vicinity of cable penetrations.
Should such materials as rags, etc.
be brought into the Complex in the area of the cable penetra-tions, they will be kept in self-closing safety cans and re-moved f':om the Complex at the end of the day.
Building the new ctacrete walls on the Control Building east (N line) wall and on the west (R line) wall will require that some wood form material be used.
At any time that the form material is in the Complex, fire extinguishers will be available in its vic-inity.
The forms will be removed before any welding or cut-ting operations in the vicinity are begun.
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CI #2A & C Page 5 of 6 E.
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Edwards 10.
The major part of whe welding necessitated by the modification work will be to cor.nect the steel plates described above.
All other welding, including Cadwelding, required by the modification program will also be done in strict accordance with the precautions discussed in paragraphs 7, 8 and 9 above.
11.
There is no welding planned in the Cable Spreading Room.
12.
Thus, as described above, adequate fire protection measures will be taken in the vicinity of cable penetrations during the modification work.
In addition, adequate fire protection measures will be taken with respect c7 all welding duriag the modification work.
BO-1 1086 Q}
CI #2A & C Page 6 of 6 E.
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Edwards I,
E.
W.
Edwards, of lawf ul age, being first duly sworn, state that I have reviewed the foregoing af fidavit, and that the statements contained therein are true and correct to the best of my knowledge and belief.
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(
E.
W.
EDWARDS STATE OF CALIFORNIA
)
)
ss.
County of $$ N FeA ucivo >
g SUBSCRIBED AND SWORN TO before me this day of 8 b 'p/ %T 1979
)
M)M NOTARY PUBLIC FOR CA
'ORN I A
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My Commission Expires OFFIC!AL SEAL
@ NOTARY PUBLIC. CALIFCANIA FRED BORGM AN SAN FRANCISCO CCUNTY My comm. expires OCT 2,1979
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ATTAC11 MENT 1
'EtSEQNSES TO NRC AFFIDAVIT OF E. W. EDWARDS TECHN QUF.S' CNS CI #2A & C DATED F 1979 PACE 1 of 5 ATTACEMENT 1 PAcf 1 of 2 m
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Weld Shield Tab rics Claremont Weld Shield fab' ries have been designed for difficult and demanding service condi* ions. Under no rmal w. 2 4ing and acetylene cutting conditions Cla remone W eld Shicid fab rics will ;i many times the use and wear life expect,M of conventional welding cloth.
C on st ruction Weld shield fab rics are made of specisi ;1 ass fabrics designed for high strangth The incombustible characteristics of glass are then enhanced and flex r e*istance.
with a specially compounded !*eoprene coating.
ine resulting fal: ric provides high abrasion resistance, tear and puncture resistance, ca.sy sewing and will ned molten metal splash in a good many applications.
Advanta ce s
}.ie st conve ntional fab ric s usec fo r welding o r acetylene cutting p rotection can become cuite flammable if centsminated with oils o r greas e. Weld Shield p roducts do not readily abso rb any liquid and surfaces can generally be wiped clean increasing the life and safety of the fab ric.
.ne combination of glass and Neoprene in a fab ric make it clean to use-no lin or dust to contaminate immediate or adiacent a reas. Weld shield fabrics are lightweight and strong permitting easy sewing of eurtains, pads and clothing.
S ooliCa tions_
F.ocection vf equipm ent. protection of personnel, fismeproof curtains fo r eye Weld Shield can be used to protection (of chippers, sanders and welders).
dirce: acetylene cuttine drop to desired areas, all purpose protection during heavy const ruction whn.re welding, cutting, ab rasion and flame a re p res ent.
Weld Shield fabrics can be used for Safety Clothing applications such as aprons, coa:s, shoulder pa'ches, spa:s, pan:s, etc. based on the hacard and conditions.
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,....ICAL DL.,,A 1ChiIr Cata 1 Pg. 2 DAE June 1-M ATTACHMENT 1
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'I #2A & C TECHNICAL QgEST20NS DtIED MARCE PAGE 2 of 5
, 1979 ATTACEMENT 1 3 ASE FAB RIC OATA 2fGE 2 of 2 Stv!e Number 2.:
3as e Fab ric
_ 32 W ca ve Cla s s Plain Class C o n s t. WXT Plain W :ht. c:/ /d. -
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F. R. Neoo rene FTMS 191 Colo r
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3 alanc ed Creen #239 Tinis h Salanced T ex:ured T g ht, e - /,.d.
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32'2 33-35 Tensite: Warp 230 35-40 Fin 230 90 5102 Te s -.
W aro 15 5102 230 rin '
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A f te r Olow (s ec. )
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