IR 05000289/1972006
| ML19291B525 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/25/1972 |
| From: | Folsom S, Howard E, Varela A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML19291B519 | List: |
| References | |
| 50-289-72-06, 50-289-72-6, NUDOCS 7911080544 | |
| Download: ML19291B525 (7) | |
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U. S. ATOMIC ENERGY COMMISSION DIVISION OF COMPLIANCE
REGION I
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CO Inspection Report No. 50-289/72-06
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Subject:
Metropolitan Edison Company Three Mile Island Unit No. 1 License No._ CPPR-40 Location: Three Mile Island (near Middletown)
Priority Pennsylvania Category B
l Type of Licensee: PWR 831 MJd
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Type of Inspection: Special. Unannounced
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p Dates of Inspection: March 23 & 24. 1972
'J Dates of Previous Inspection: March 9. 1972 Principal Inspector:
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S. A. F
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Accompanying Inspectors:
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A.'A.' Vahela, Reactor Inspector Date
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Data
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Other Accompanying Personnel:
None I h4 7Y Reviewed
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A,E. M. Howard, Senior Reactor Inspector Dd'te Propriet ry Information:
NONE
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Section I Enforcement AcLivu None Licensee's Action on Previously Identified Enfcecement Matters
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None Unresolved Items Concrete voids have been identified in the South 180 section of Containment '
Building ring girder.
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Status of Previous 1v Identified Unresolved Items Repair is continuing on ring girder concrete voids in the North 180 section of the Containment Building in accordance with proposal submitted to DRL.
The sixth of about twenty-two concrete replacements was made March 23, 1972.
(Section II f
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Design Changes a
Not applicable.
Persons Contacted
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Metropolitan Edison Comnany/GPU Mr. R. W. Heward, Project Manager Mr. M..J. Stro= berg, Site QA Supervisor *
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Mr. J. H. Wright, Resident Civil Engineer *
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Mr. R. Neidig, Assistant Resident Civil Engineer *
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Mr. J. Connelly, Assistant Resident Civil Engineer *
Cilbert Associates Mr. R. Fleming, QA Site Cooridnator*
Mr. T. Heist, QA Engineer UE&C 1583 1 A2 Mr. R. Moyer, QC Supervisor *
Mr. P. Dailey, QC Inspector Structural *
Mr. D. Lambert, QC Inspector Mechanical *
Mr. J. Malvin, Lead Inspector Mechanical
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Mr. R. Breunan, Inspector
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Mr. R. Hawley, Repair Supervisor
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- Attendee at Management Interview
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Managemeitt Interview
1.
The inspector asked what precedure the licenceo ** uld follev in
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reporting concrete voids identified in part of Containment Building ring girder 180' Couth section.
(Section II, paragraph 2)
1, The licensec stated that as spoken of in Addendum to Report to DRL
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offanuary 19, 1972 a detailed examination will be made of the entire 180 South section when all scaffolding is erected. An engineering
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evaluation will be the subject of another Addendum to DRL.
I 2.
The inspector stated his review of recor'ds for exact location of Cadwell
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splices found lacking at the last inspection, indicated those records l
were corrected and now appeared complete.
(Section II, paragraph 1 (e))
f The licensee replied that missing elevations on some Cadweld splices j
had been obtained from field records that had not been filed.
3.
The inspector inquired if the licensee was satisfied with an omission of NDT on welded hoop repair replacements for damaged conduit spiral reinforcing.
(Section II, paragraph 1 (g))
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The licensee replied that welding was in accordance with Procedure No.
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s_s 22 and no NDT was specified on these welds by GAI, but, the project engineer would be requested to provide justification that no NDT was needed on hoop welds.
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I 1583 143
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Section II s-
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Additional Subiects Insoected, Not Identified In Section I, Where No Deficiencies Or Unresolved Items Were Found None Details of Subiects Discussed in Section I
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1.
Ring Girder Repair Voids in North 180 Section
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a.
Status of Construction i
i See attachment.
i b.
Sure.ary of Repairs Completed See attachment.
c.
Concrete Preolacement Check on First Lift 30 Segment I. Pour No. 6 g
The inspector examined the physical elements repaired within this lif t, and evaluated the adequacy of preparation of sanpower,- plant
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and equipment before concrete placement of Pour No. 6.
In addition, the inspector reviewed quality control records. No nonconformance jesg
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to Repair Procedure CCP-9 and QC Procedure No. 1 requirements was l
obcerved.
d.
Observation of Work Performance on First Lif t 30 Segment I, Pour No. 6
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The inspector observed concrete testing before placement, aanveyance, delivery, placement, consolidation, finishing and curing of this concrete lift made on 3/23/72. All operations appeared to be in con-formance with job specifications, ACI code 301, FSAR commitment and Repair Procedure CCP-9.
e.
Record Review of North 180 Repair Documentatien (1) The inspector performed an overall review of UE&C's QC records on work completed. The General Files for repairs within each of six concrete placements completed were examined for complete-ness and traceability and, appeared to be without deficiency.
The inspector's comparison of contents of each file de=enstrated consistency and completeness as identified in CO Report No.
50-289/72-03.
(2) The review specifically identified file where previous inspection disclosed some Cadweld splices did not have exact locations. Exam-ination of these records showed that corrections had been made and, this eliminates a deficiency identified at the last inspection.
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1583 144
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STATUS OF CONSTRUCTION
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Order of
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Segment Location Work Work Concrete No.
Azimuth Dometedons Completed Underway Placement
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I 15 108 to 93 224/218 2 of 2 lifts
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III 30 93 to 63 149/133 217/201 None None
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II 30 63 to 33 132/118 2 of 3 lifts Cadwelding &
concreted chipping roof concrete-1&3 III 30 33 to 03 117/101 301/317 None None
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1 30 03 to 333 318/332 1 of 2 lifts i
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concreted on 3/23/72
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III 30 333 to 303 201/217 I!
333/347 None None
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11 15 303 to 288 218/224 1 of 3 lifts Cadwelding, welding concreted hoops, grounding
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wire, clip roof con-
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crete
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Cu 180 108 to 288 6 lifts concreted *
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SUMMARY OF REPAIRS COMPETED
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Spiral Concrete
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Cadwelds Welds Replac.
Core Strain in yards Segment Lift Location In-Place Rei't.
Butt
' Nicks No. Hoops Holes Gauge Placed
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224/218 122
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132/118
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132/118 266
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332/318 311
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224/218
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Totals (In-Place)
823
22 103
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Repair cut-out to provide access for other work.
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Repair cut-out and replaced with full length bars or cadwelds af ter five were
f rejected for excess porosity found in Radiographs.
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Repairs rejected on visual inspection and/or Radio and replaced by cadwelds.
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(3) Sampling was performed of cae of fifteen Particular Files, Felder D 325 N, on placement 96.
Seven repert: ccvering thccc items were found without deficiency:
(a) Butt welds
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(b) Spiral ring replacement by welded hoops (c) Cadweld report (d) Tendon conduit repair and leak test (e) Concrete excavation an'd core hole (f) Strain gauge and grounding cable
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(g) Rebar removal and replacement f.
Lack of NDT on Hoop Welds The inspectors examination of records on ring girder North 180
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repair, file #D 325 N disclosed that no NDT cnisted on hoop welds.
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The records were noted "No Radiographs Required". The inspector
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verified compliance to Weld Procedure No. 22 and referenced code AWS D1.0-69.
Since the latter leaves NDT to job specifications and
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no NDT was specified on the hoop welds the inspector inquired at Management Interview if licensee accepted the omission.
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Inspection of Voids in Ring Girder South 180 l
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The licensee's Project Manager, Mr. R. Heward, notified Region I on the af ternoon of March 22, 1972, that voids had been identified on
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Containment Building Ring Girder South 180 section. Inquiry Report No. 50-289/72-01, written by C0 documents this notification and states
that inspect. ion would be made by CO.
The inspector visited the area, where scaffolding recently erected, azimuth 288 clockwise to 243, permitted close inspection on 3/23/72 and observed exposed rebar on 30 Segment III D 101/234 116/249.
Radial anchor
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tension bars and circumferential bars are completely devoid of concrete on the upper half of ring girder ledge between upper and lower trumplates.
The sides of the upper boxed-out trumplates also exhibit unconsolidated (popcorn) concrete and voids were observed in back of the upper trumplates.
Continuing counterclockwise to Segment II, D 117/133, in about half of this segment the concrete ledge beneath these upper trumplates, the radial anchor bars are exposed. Polaroid photographs taken of the voids in Segment III retained in. Region I files are available upon request.
In telecon with J. Wright on 3/30/72 the inspector was informed that
scaffolding was erected for about 80 on South 180 and no additional voiding was observed. Wright stated that a thorough inspection had not yet been undertaken.
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