ML19319A627
| ML19319A627 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 01/29/1969 |
| From: | Long F, Seidle W US ATOMIC ENERGY COMMISSION (AEC) |
| To: | |
| Shared Package | |
| ML19319A626 | List: |
| References | |
| 50-269-69-01, 50-269-69-1, 50-270-69-01, 50-270-69-1, 50-287-69-01, 50-287-69-1, NUDOCS 7911180064 | |
| Download: ML19319A627 (18) | |
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U. S. ATO:4IC E!:51GY CCIC41SSION x.OTC:1 II DIVISIO:i CF CW. PLT A??CE i
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Report of Inspection 4
CO Report !!os. 50-269/69-1 50-Y/0/69-1
,. SC-2c7/69-1
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Licensec:
Duke Power Company Licence !!as. CPPR--33, 34, and 35 j;
Cattgery A Dates of Inspection:
Jantary 6-8, 1969 Dates of Previous Inspection:
Septede r 25-27, 1963
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Inspected By:
Willian C. Seidle, Ecactor Inspector Dai.c
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'f Reviewed By Y \\,vW 7 iOM l
F. J.15d, Senio:filesctor Inspector
~[Dath Proprictary Infomation:
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An announced inspection was made of the three 2568 :M, pressurized water I
i power reactors under constrnction near Seneca, South Carolina. Tne mjor inspection itms were concerned with the Unit 1 contaira.en, building penetrations, blasting, liner plate welding, contairc.cnt buildin;; founda-tien preparation, concrete test results and placement of the Unit 2
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contaiment building nat.
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Safety Ite:as - I!cno
_!!o__nconfor:'anco Items - ?!onc
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Unusual Occuri-ences - During an on-site follow-up check of the Southern F
Boiler Shop weld problems involving eight Unit 1 containment building.
penetration rections (initiclly reported in CO F,cport No. 50-269/62-4),
the inspector was infomed cf the following deficiency in the chop I-quality control inspection program: ilhile crecting liner plato pene-tration section SP-25, a field welding inspector visually detected an inch long 3/8-inch deep crack in a shop ucld joining a.12-inch ID penetration picco to the plato. Vendor shop radiographs of the wc3d clearly shoveed the defect but, due to an appare.nt brenhdown in the shop quality control program, the crack ::s not detected prior to shipent (see Section D.l. and Mana'gement Interview Section).
Status of Previous 1v Remrted P; obles - During the previous inspection, p!
one item of ncnconfornance was noted: Cadweld tensile strength test
' records revealed that the minimum specified test requirements were not not during the splicing of 198-18S robar joints for the period June 29, 1968, throug'n July 17, 1968.
4 Corrective Action - Wolls info med the inspector that on October 6, 1963, the Cadwcld record nu. baring syste: was changed whereby the QC inspector can now detemine by the sequential splice number when a specified tensile test is required. The inayector reviewed the Cad: eld records for the past three conths and ncted that the frequency of the tensile tests met the specified requirc.ents stated in Construction Specifica-i i
tion No. 03-134-2 (Section 1 5 2).
'i Other Sinnifichnt Ites_ ~ Eased en man-hours spent, the percent of i
I constriction ccmpleted for Units 1, 2 and 3 combined is 15 percent; for Unit 1, 20 percent.(see Secticn C).
Defectivo shop welds in eight Unit 1 liner plate penetration sections, which delayed contain:nont construction two conths last sumer, have been repaired (discussed in C0 Report No. 50-269/68-4, Section D.l.).
The sections are erected, and the placcnent of the concrete wall panels has
,. i resumed (sco Management Interview Section and Section D.).
t Placement of the Unit 2 contaircnent building cat is in progress; three of the seven mat pours are ccnplete (sco Section C.).
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A meeting date of February 4 has been set for Compliance to meet with l
Duko and FAW personnel to discuss th,. QA program associated with the fabrication of the Unit 1 reactor ~ pressure vessel (see Section H.).
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y Mannement Interview - The inspector met with Lee, h' ells, Rogers and
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' Dick at the cenc3u -ion ' of the visit. The foHewing items were dincueced:
, 1.
' op Weld Defects in Unit 1 Containment Penetrations _
j 0TE: Lee attended the managcc.cnt interview, at the inspector's request, to discuss the shop weld deficiencies observed in eight Unit 1 penetration acetions (Ref: C0 Report ?!o. 50-269/6%A).
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The inspector began the discussion with a brief review of his i
1:ovember 15 visit to the Southern Boiler and Tank Works, Mcaphis, l',
where the liner plate and penetration sections for the Oconca Units l !
are being fabricated (Pef: CO Report 1:o. SCL269/60-5). It was pointed out that the purpose of the visit >:as to review the Southern Boiler Shop QC program associated with the fabrication of the penc-tration sections for Unit 1 with particular attention given to recent improvements made in the prodram. The inspector state d that in the course of the shop. visit, R. Strong, Chief Engineer, Southern Boiler Shop, infonned his that Duke's wcld design was poor
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for many of the weldments joining the penetration sleeves to the thickened portion of the liner plate section; adcquate. penetration was difficult, if not impossible, to achieve. At this point in the discussion, Lac was asked to claborate on the poor weld design problems and the shop QC probicas experienced earlier in the year.
Isac replied that the weld design proble.s were due to an error n
the shop drawings. Bechtel weld design drawings call for a 1/8-inch root gap between the penetreticn sleeve and the thickened penetration plate; full weld penetration is required. Wnen Southern Eoiler prepared their shop drawings frcm the Rechtel design drawings, they somehow omitted the rcot gap detail. The ecmpleted shop 4
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drawings were reviewed by both Duke and Ecchtel En8 neering; the 1
j root gap omission was not caught by eithe: party. As a result, the sleeves were butted up to the plato and welded. Lee stated that i '
many of the lack of penetration weld defects can to attributed to j
not having the specified root cap. However, he said this has not been the only.probica. 'Tne Southern Boiler Shop was hit vd.th a long and bitter strike after the contract was let, but before Duke's work was started. Many of their best weldors quit and replacements l'
have been difficult to find. He stated that Southern Boiler's adoption of a financial incentive program for certified welders whose work requires 100 percent radiographic inspection has produwd a I
marked iuprove.nent in the quality of welds. Lee stated that Duke has also had probicas with the third party QC welding inspection
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effort in the shop. (The Law Encincering Testing Company, Einainghm, Alabama, provides the third party shop inspection m
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services fo'r Duke.) The probica has been primarily the lack of I-co uunicaticn hct toen D&e design encin ces and the third party I;
incpectors, accordin5 to Lee.
Ile said Duke has learned the hard i:
way that ycu cannot hand a set of drawings and specifications to the shop inspectors and auto.natically all salient incpection items will be covered. Rather, it is nececcr.ry to conduct; briefing sessions with the shop incpectors to alcrt them to the QC inspec-tion details that nust be covered for the shop fabrication hardware in question. Lee stated that such briefing sessions are now being i
conducted for Duke's third party vendor shop inspectors.
At this point in the necting, the inspector directed the discussion to the inch long shop neld cre.ek that the field weldind inspector visually actected in penetratien section Sp-25 during the fit-up of this section into the centainmnt structure wall in nid-::cve:ater 3
1968. This section arrived at the site on November 1,1968, acccrding f
to Wells. The inspector called Lee's attention to the fact that the Southern Boiler Shop radiodraphs that accompanied the penetration section to the site included two radiographs that clearly shcwed
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the crack..One radiograph sho.A:d Ihe crack to be, actually about l'
threc inches long and positioned near the penetramotor. At this point, the incpector asked Lee to view the two radiographs which y
unre displayed at the teeting and cbserve, firsthand, that there was nothing subtle abcut this particular wcid defect. After viewing
- k the radiographs, Lee concurred with the inspector's cbservation. The inspector then posed the follcwing questions to Lee
Ouestion No. 1: Uny didn't the Southern Eoiler Shop and law Engineering
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QC Uciding inspectors detect the SP-25 crack defect when conducting i
their-visualgxsnination of the welds or when excenining the radio-
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radiographs?
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-t Answer: Ice had no explanation, at this time, as to why the vicual
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chop inspections did not detect the crack. However, his cubsequent i
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Duke Specification No. OS--139-3 (Appendix SE), " Shop Incpection of Reactor Euilding Liner Plate and Accessory Steel," specifies that 100 percent of the welds shall be visually examined and one foot in each 50 feet ccmpleted in the flat, vertical, ho
- _antal, and overhead positions will be radiographed.
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cccments implied that he 5:culd check into this matter. As for not detecting the crack in the radiegr.7 s, he said it is quite l es iihlc h
that during the trcnsiticn frca perfenning radiographic cminations on a spot-check basis to that of 100 percent emination, the QC shop inspectors may have' missed these particular radiographs. Lee stated that a shop radiegraFh checklist has cince,been put into use whereby the QC inspector (s) must indicate by initialing the apprc~
priate space that he did, indeed, review the specific radiograph.
Cuestion Mo. 2: that assurance do ycu nov have that all the other
. Southern Eoiler Shop penetration section radiographs taken to date were rcviewed by shop QC inspectors? Also, how do you know if all welds were visually examined in the shop?
Arador: Loc stated that he could not answer either question withcut first checking the shop QC checksheet records for each penetration i
section. He implied that such checks would be made. (This will bc a follow-up item during the next inspection.) Wells injected the
- cc=nent that the field QC wolding inspectors have visually emdned L
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all Southern Boiler Shop welds to date as the hardware arrives on-site.
Question No. 3: hto in Duke's organization audits the QC inspection 1
perfomance of the third party inspectors representing Duke in the vendor shops?
s Answar: Lee stated the Design Engineering Department, Charlotte, l
is responsible for all vendor shop inspections. The cognisant mechanical, civil, cicctrical and instrument engineers make frequent visits to these shops at which time the QC inspection program is
.i audited. He stated that it is not Duke's policy to have Duke inspectors in residence at vendor shops. He said that in the case of Southern Boiler, Duke has recently assigned F. R. Jackson, Staff Kochanical Engineer; to the shop en a part-time basis, i.e.,
two to three days every other week. (His qualifications in welding inspec-tion are discussed CO Report No. 50-269/68-5.)
The inspector stated. that in early February he plans to visit the principal
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offices of Duke for the purpose of discussing vendor shop quality centrol uith the design engineering personnel. Lee stated he would look forward to the visit as this would give him and his staff an opportunity to revicw Duke's vendor shop QC program in detail.
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Strnin rance Installation - Units 2 nndJ 4
j As a fol}>gw-up to a Ccepliance Headquarters memorandum on this subj ect,- the inspector asked Lee if cr.y consideration had been i
given to installing at lbast a few strain gauges in the Unit 2 and 3 containment buildings in order to demonstrate the respcnse of these structures. Ice replied that the Unit 1 structure will 4
i contain over 230 dtrain gauges; Duke has no plans to install any gauges in either Units 2 or 3 as "there uculd be nothing new to i
learn in doing so." 'The inspector stated that both DRL and C0 consider the installation of at least several strain gaurea en f
Unita 2 and 3 as highly desirable. Lee replied that Duke's position of not inctalling strain gauges in Units 2 and 3 was discusaed in i
i detail with DRL during the PSAR reviews and that Duke's position i
remains unchanged on this matter. The inspector did not pursue the subject any further.
3 Rebar Fitun Problem - Unit 1 Eiolocien.1 Shield Uall In a previous inapection reltrt (C0 Report No. 50--260/68-4), the inspector discussed a rabar fitup problem he observad during the placement of 18--S rebar in the biological shield wall within the containment building. I'ene of the rebars observed were shaped in a manner that trould pennit proper fitup of the Cadueld s1ceve. T!ns matter was called to the attention of L. D. Dail, Duke's Principal Civil Design Engineer, during the last visit. He made the ccanent that proper alignment of this type of Cadweld connection could probably never be satisfactori];.* achieved in these particular biological shield wallr. and that Duke intended to redesign this and s
other similar walls within the building using Mo.11 rebar with a lap and tic joint. The insnector infcnned Lee that DRL, v. hen made aware of this fitup prob 1ci,2/ expressed concern that the application of No.11 rebar, using a lap and tie splice nay not be adequate for l
the proposed design 'of these containment structures. Wells stated that no rebar design changes to the walls in question will be made in the Unit 1 structure. He also wanted it made clear that tho.
rebar fitup problcm did -not involve the outside walls of the contain-ment structure. Rogers stated that Duke Design Engineers are proposing the use of No.11 rebar, using lap and tie splices, in 4
the biological shield walls for Units 2 and 3 N Reference Lmorandum, J. P. O'Reilly, CO:HQ, to F. J. Iong, C0:II,
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e subject: Duke Power Company, C0 Report Nos. 50-269, 270 and 287/6M, dated 11/26/68.
2/ Ibid.
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Insr,cetor)a note: Use of No.11 robar using lap and tie splices g
is consistent with Section 4.2. of Appendix SD to the PSAF dich states "...For reinforcing steel of size Ell and under,. lap splices I--
will bo pcmitted in accordance with ACI 318-63, Chapter 8."
4.
Nonconfomance Iten Fron Irist Site Incr.ection Wells discussed t'ie changes nado to the Cadweld record keeping cyutem i
to correct deficiencies associated with the frequency at which i !
specified tensile tests were perfo:-ned (discussed in Status of
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Previously Reported Problcms section of this reporti.
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- DETATIS A.
Persons Centacted i
Duke Power Company t
J. C. Rogers, Project Engincur J. R. Wells, Principal Field Engineer /QA Enginect R. L. Dick, Project Manager W. S. Ice, Vice President - Engineering j
J. T. Moore, Chief t'elding Inspector C. Wilmot, Weldor H. Scruggs, Stores Supervisor i*l C. York, Assistant Field Engineer - Kcowee Project Babcock & L'ilcox Comnany 3
W. Faasso, Engineer - Erection Departz.en', Barberton, Chio i
- Administration and Orennization B.
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Duke Construction. Personnel 7
I The position of Field Engineer - Electrical was filled in Noveaber 1C68 by C. P. Aycock. He holds an E. E. degree frcri North Carolina State University and has been employed by Duke
.y for six years.
1 A. R. Thornton was recently hired as a Wolding Inspector. Ho has cleven years of radiography experienco 1.hich he acqui;cd while working for PIM and the Thickal Cheenical Corporation.
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TnW Construction Personnel
.j The MW Cc.;-esny now has a full-time encim.cri;.g repreccat.tive y
at the site. He is W. Faasse, Erection Department - E6W, y
Barberten, Ohio. Faassce is presently working with Duko persennel il in developing procedures for the receipt, inspection, and sterage j
of the steam generating equi nent.
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QC Cccanization - Duke
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A copy of a new organization chart for quality control and
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technical support is attached as Whibit A.
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4 Is.bor Relations 3
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In October 1968,528 Duke ccnstruction e :ployees votad on thother l
j or not to join the labor union; the vote v.as 65 for a union, 463 against.
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5 Pining Code Chanco 4
Duke has requested their pipe cuppliers to nect the fabrication
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requirenents of the new " Code For Pressure Piping," ASA B31.7, J
issued for trbt1 and ccmment in February 1968. The piping codo y
specified in the PSAP. is ASA 331.1.
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C.
Construction Prorreas il 1.
Udt l 4.
S The contairasent building liner plate is crocted through the lj seventh horizontal ring; the concrete wall panels are placed through the fifth ring. The concretc work inside the containment j
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building is complete up to ground level.
0 The first of three 600 ton, onec-through steam generators for,
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Unit 1 is expected to arrive en-sito April 30, 1969 T'le first reactor prcosure vessel (TS:U) is scheduled to arrive on-site in i*
mid-July 1969.
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Unit 2 I
Placc.cnt of concrete.~cr th e er rh'e,t building nat is in The mat will be placcd in scven separate pours; four progrecs.
in the first lift, three in the seccnd lift. Three 700 cubic yard pic-chaped pours have been placed in the first lift.
3.
Unit 3 The site preparation work is ccaplete. Constructicn work has
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- not started on thi's Unit.
. NOTF.: Photographs of constructicn procress are attached to the h.
Region II copy of this report.
D.
Contaircent Duilding Liner Plato - Unit 1 f
1.
Follow-up On Shop Weld Deficiencies in Penetration Sectionq During a site inspectien visit in Septen.ber 1968, the inspector
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was infomed that defectiv,e shop walds were detected by field
.l QC inspectors in eight penetration sections identified as Srl/ -20, g
SP-21, SP-22, SP-23, SP-24, SP-25, SP-27, and SP-30.
(The defcets are discussed in C0 Report !!o. 50-26?/62-4, Section D.l.)
In nid-Nove.ber 1968, the inspector visited the Southern Poiler Shop and Tank Werks, IOnphis, Ter.nessee, to review the CC progrm associated with the fabrication of the liner plate penetraticn e
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sections. The inapector was particularly interested in recent improvements made in the shop QC inspect. ion program as a result of the weld defects detected at the site. Details of the shop visit are discussed in C0 Report I!o. 50-269/6 S-5 As a follow-up to the penetration veld problcm, the inspector talked with Moore.to detemine if the field QC welding anspectore had noted any recent inprovements in the quality of the Southern Doller Shop velds. 'icorc stated that he has seen a marked improvenent in the quality of the shcp ucids. Lhen asked if'he 1
had observed any significant defects in the welds associated with
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the eight shop--repaired penetration secticn3 after they returned to the site, he replied that one hcd been observed, no said I
that during the crection of penetration section SP-25, a stelding i
-inspector visually detected an inch icng by 3/8-inch deep crack in a weld connecting a 12-inch ID penetration sleeve to the 3/. SP - Shop Piece
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thickened liner plate section.
(The crack location is shown 1~
in Exhibit B.) ' Ho stated that the welding inspector checked to j.' :
j-see if the crack ent through the pinte by applying dye penetrant to the crack and deve3cpr to the opposite side; the crack did not go through the plate. Moore said that later he checked 4
c' f the SP-25 shop radiogr,aphs that acccc:panied the penetration section to the site.9 Cne radiograph clearly showed the crack defect; a second radiograph taken of the see weld after the i j repair of a slag defect., per the shop log, revealed the sane crack defect as the original filn. Moore stated that for sone unexplained reason the crack was ccapletely overlooked.
I The inspector's follow-up discussion with Duke management on S[ ';
the matter of the un'!ctected crack defect in the weld is covered in the "anage:acnt Interview Section of this report.
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2.
Srot Check of liner Plde Uelding
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During a tour of the li.ner plate receiving area, the inspector i
observed that a weldor had juat completed welding together two
!j sections of A-36,1/4-inch thick steel linor plates. The two I ',,(
sectic.ns, ona 28 feet icng, the other 32 feet long, were posi-
,a tioned in a vertical jig. The inspector obtained the follcwing infomation frca the veldor and wells:
'i Weldor's th ae: Clark Wilmot I
Weldor's Mark:
"9"; sta: aped at two-foot intervals along wela.
Weldor's qualification Status: A cubsequent review of the I
current Weldor's Qualification List, which is maintained in j'j the Duke QC file, revealed that Ullmot qualified on June 25, 1968, by Welding Test No.106. His weldor's mark number was shown i.
as "9" on the list.
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Welding Process Use'd: Sec.1-autctnatic gas metal arc welding
(!GG).
i Duke Specificatio'n !!o. C3-139 (Revised 4/8/68) specifies that the L
12-inch ID seamless pipe sleeve will cenfona to ASTM A-333, Grade 6; the penetration section plate to ASni A-516, Grade 70, Firebox
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j Quality and AST51 A-300.
Radiographs identified as SP-25 Ec0 and SP-25 E60Rl.
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Type of Welding Machine: "Cobramatic" - product of
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Cas corpesition - 75 percent Argon, 25 percent CO -
2 Concumable wirc electrode ho. CC-37; i
Electrode Descri,ntion:
diameter
.035 inch; wire heat No. 659V732,F.
Liner Plate Pent t'os. : The heat numbers stamped in the plates were 27C324 and f,9C693. Wells provided copics of the mill test " reports for the ahove heat numbers; the reports are att. ched to the 00:11 file copy of this as Exhibits C-1 and C 2.
inspection report H.
{r A continuous backup strip was used. The fitup Fitup:
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gap appeared to be a no.tinal 1/4 inch as indicated by observing the top and bottcm ends of the ucid, The inspector's visual examination of b'cid Appearance :
the wcld revealed no are st rikes, surf ace c racks or craters, or undercutting.
Frr.' the standpoint of cyc appeal, the
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wcld looked good.
' find Protection: A rat.her elaborata plastic windbreak was provided for the ucider, as wind can produce a deleterious effect on a HIC-type velding operation.
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Uelding Specifications: Duke Specification No. DP 2,
" Semiautomatic Cas Metal Arc Welding Process - Liner Plate Welding," was reviewed by the inspector. T>ased on the itens checked by the inspector, the fic1d welding operation F ;
appeared to co:nply with the specification.
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3.
QC Review of Radior, rat s The ins; ector asked Wells if anyone in Duke's QC management spot checks radiographs taken in the field to ascc-tain that a radiographer is not'" cheating" by taking; shots of the sarne-ueld over and over again. Wells replied that Duke velding He stated that
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inspectors do all cf the field radiography work.
each day he personally meets ieh the Chief welding Inspector to discuss the radion.aph progress and spot check the recent Ec also pointed out 'that D. Ritchi, North Carolina shots.
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Stare University graduate in M.E., Class of 1967, has the I
In administrative control responsibility for all radiographs.
this capacity, he provides another review of the radiographs and would be cognizant of any film discrepancies.
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1 E.
Cadwelds - Units 1 and 2
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In a spot < heck of che.';ecid reccrds for the pe.-iod October 6, j
1968, to January 3, 1969, the inspector obtained the folicwing information on sister splice test results:
Rchar Size, Tensile Date Position, and S t rength Cause of I
1968-69 Unit No.
S equence 50.__.
Test No.
Result s (FSI)
Failurc 10/14 1
14V-41 94 111,778 hil Cut
'i 10/16 1
Ita!-26 95 107,556 Pull out ui 10/16 1
ISV-15 96 93,250 f
11/5 1
13V-68 101 100,500 t
1/3 1
' 5V-3 4D.
12 4 87,500 11/2 2
lau-100 99 88,750 Bar Broke 11/5 2
1EH-141 100 97,750 11/7 2
18H-191 102 106,500 11/8 2
18u 245 103 102,250 During the period October 6,1968, to December 31, 1968, the following number of Cadweld production splices and sister tects were raade:
Rebar Size and Position No, Tests and Splices
' N o. 11 H 24 prol.uction splices; no tests No. 11 V 7 production splices; no tests j
'No. 11 VBP' 176 production splices; 3 tests No. 14 H 68 production splices; 2 tests (average tensile test strcngth - 104,222 P31)
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Rebar Sizo
- I and Position Po. Tests and Sn13 ces i
No. 14 V 270 production splices; 6 tests (average tensile test streni;th - 101,217 PSI) t No. 18 H 605 producticn splices; 14 tests (average tensilo test strengtF 97,535 F3.T) s No. 18 V
~270 product, ion splicos; 6 tests
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(average tensile test strength - 94,375 PSI)
The inspector noted that during the period October 6,1968, to j
Jrnuary 3,1969, the following number of Cadwelds ware rejected h
on the basis of visual exr;nination:
I!
Size
- 16. Rejects
!!o. 18 S 61 l
No. 14 10 No. 11 8
Slag in the Cadweld sleeve tap hole and ins 0fficient c:aount of filler metal between sleeve and robar waro the main causes for rejection.
1 F.
Concrete 1.
Unit l__ Contair2ent Euil_dinc Valls Current cylinder ccqressicn test records revealcd the following infonnation:
1 Specified 23 7 hy 28 Day IIay Strength Date Incation' Strencth (PSI)
Strenr,th (PSI)
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'11/26 Wall PanelM D-3 3891 6031 5C00 12/4 Wall Panel F-5 3802 5712 5000-12/5 Wall Panel C-4 3767' 5553 5000 t
O - Ref. PSAR - Vol. II, ' Appendix 5B.
Panel conta. ins abcut 90 cu. yds.
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'The following information was obtained from a spot check of the concrete placement records:
D3t c Location Sleep
% Air En ch Temperature
!.ir Terpe ratu re
.12/17 Wall. Panel C-5 2-1/4" 3.5 420 F.
230 F.
12/20
'Jall Panci A-5 3"
3.4 49 F.
NOTE : Hot unter das psed in the 5.1tching of concrete placed on Deccaber 17, 1968, (see above). The minicum placing tenperature for the concrete is 400 F. as specified in Duke Specification 4
No. OS-160 (nev. 6/12/63), uponc rete for the Reactor nuilding."
2.
Honeyceabing The inspector examined the exposed concrete surfaces of the st ructure for evidence of hencycombing defects;1/
containment only some very slight honeycombing uns detected in a two square foot area on the outside vall at the fcurch and fifth I
ring elevation iramediatery to the left of the south buttress.
In March 1968, the inspector examined the tendon inspectica gallery for evidence of honeycombing cnd for voids around the tendon base plates; none of these defects were detected.
(See CO Report No. 50-269/68-2.)
't 3.
Unit 2 Containment Building Mat The following information uns obtained from a spot check of the concrete placement records:
Specified Ave rage Ave rage Ave rage Ave rage No. Cu.
Strength Slump Air Content Batch Temp. Air Tenp.
Date Location Yds.
( PSI)
(Inches) (%)
(O F.)
( F.)
12/10/63 Pour Ko. 1 607 5000 3/4-23/4 2.0 4.5 46 -50 32-- 42 12/18/68 Four No.- 2 700 5000-1 1/2-3 2.6 - 4.8 42 - 54 1/ Ref.'Mcnorandum, J. P. O'Re111'y, CO:Hqs., to F. J. Long, CC:II, j.
Subj: Duke Power Company, C0 Report Nos. 50-269, 270 and 287/68-4, f
dated 11/26/68.
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Foundations - Unit 2
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UcIls provided the inspector with th'e follcuing i nfount i on:
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Unit 2, like Unit 1, has a solid rock foundation. A MCO psi strength concrete working slab was placed on top of the rock.
Fissures in the rock were filled with a two parts sand, 1 part cement grout nixture. The grout was pumped into the fissures via 3i-inch diancter holcs drilled en five foot centets through the working slab. The grout was introduced at 4 psig.
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Blasting
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The inspector asked Wells if any blasting has been performed h
near Unit 1 and/or 2 after concrete vork had begun on either of these. facilities. He replied that a few days after the Unit I
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containment building mat was placed some blasting uns done near the mat.- At this point, Wells called in York who provided the inspector with the following information:
l On February 16, 1968, a shot was detenated 190 feet f rom the
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Unit 1 mat.
The shot consiste'd of 34 holcs containing 4.85 pounds of powder per hole.
Scisnolog measurements were conducted at the Unit 1 mat.
In using an energy ration 1 the vibration measured 55 percent of allowable value.
The inspector asked York if he could relate the Scismolog blast shock-measurements to seismic shock and thereby determine if the shocks imposed by the blasting were no greater than those the f acility is designed to with stand for "arcen" cencrete condi-
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-tions. York replied t. hat he did not have this information but could probably get it.
The inspector urged We'lls to consider documenting in a report I
to his files all data on blasting performed near the containment buildings. Include in the report the results of all Scismolog measurements and relate same to seismic shock. McIls stated that he would request ' fork to prepare such a report for the file.
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(This will be a follow-up item for the next inspection.)
i H.
Unit 1 Pressure Vessel Vendor lhting The inspector requested Lee to sch:Jule a necting whereby W. Reinmuth, CO:Hqs., R. Oller, Cv:III, and the CO:11 inspector could meet with Duke and B&W (pressure vessel vendor) to discuss the QA program associated uith the vessel fabrication. Lee advised 1
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- t C0:11 by telecon on January 10, that he has scheduled the meeting
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North Ca rolina. Thic.acetig; 1.ad 'uccn previously 5,cheduled for i
November 8, 1968, and was so reported in CO Report No. 50-269/63-4.
The meeting was rescheduled to February 4 because of a last minuto conflict in schedules.
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~ DUKE PCWER COWANY CONSTRUCTION - DEPT.
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OCONEE NUCLEAR STATION u.
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~ ORGANIZATION FOR QUALITY CONTROL AND TECHNICAL S
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t-PRINCIPAL
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FIELD ENG J. R. Wells I_.
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CLERK t
s Carclyn Harvell 4
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FIELD ENG.j.:
s FIELD ENG l
( ClVil )'
( OFFICE )
[(_ M_ _E_C_H_A_N_I_C_A_L__)y:
. ( ELECTRICAL )
FIELD ENG
. FIEL D ENG
- C. B. Aycock D. L. Freezo t _ _ _ _ _ _,, j G. L. Hunnicut I
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ASSISTANT ASSISTANT SUPV TECH ASSISTANT FIELD ENG FIELD ENG i
( CONCRETE)
FIELD ENG D. (!. Smothers
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T. L. Hunt R. V. Boggs
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(._ 7 R. 8. Mc Crory l
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ASSISTANT INSPECTORS ENG AIDE FIELD ' Ef4G
' 1, D. M. Ritchie R.' W. Simmons K. f,t Hcrd/
P. J. Burre!!
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( WELDING )
W. N. Goforth J. T. Mo o r e e r H. R. Kirkland l P. A. Whitcker
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L. J. Jones
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