IR 05000289/1972007
| ML20101S365 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/25/1972 |
| From: | Varela A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Howard E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20099A192 | List: |
| References | |
| FOIA-96-207 NUDOCS 9609030196 | |
| Download: ML20101S365 (1) | |
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8*1 UNITED STATES ATOMIC ENERGY COMMISSION
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oivision or coum iancs not e4s 3942 1 *
nsanow a e7o anoAo synEEr NEWARK. NEW JERSEY 07802 l
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$:a E. M. Howard, Senior Reactor Inspector fN
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Region I, Division of Compliance
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INSPECTOR'S OPINION AND EVALUATION METROPOLITAN EDISON COMPANY THREE MILE ISLAND UNIT 1 CO REPORT NO. 50-289/72-07 Repairs on the 180 North portion' of contairnment building ring girder are now started on areas with combined upper and lower done tendons, after completion of a11 repairs and concrete replacement on areas with single dome tendons. Concrete excavation with " tender loving care" will be needed hereon to avoid damaging rebar and -
tendon conduits due to more congestion in these areas.
In my unannounced inspections during the first phase of repairs I found the repair work, inspection, and QC was progressively improved. A few more unannounced inspections, perhaps at irregular frequency (last five have been at two-week intervals) should
. continuance of their controls.
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My detailed inspection of 180 South ring girder voids shows these deficiencies to be similar to but much less extensive than those in the 1800 North, and repairs of the South 180 involves nothing new.
Report to DRL by licensee on the North voids stated that changes in the South horizontal construction joints contributed to better con-solidation and inspection during construction.
Contrary to the above,
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my inspection of the 180 South disclosed that apparent carelessness and poor inspection in construction joint location (not stopping con-n crete pour at required elevation) caused difficulties which resulted in missing concrete in some corner pockets caused by mislocation of the joint. Although voids on the 1800 South are much less extensive
than in the North and repairs should be easier, they will have a lot of explaining (to DRL) to clear the air of doubts and re-instate
_ credibility.
For my part as CO:I inspe.; tor, I found conformance to the approved ring girder repair procedure CCP-9 and construction codes committed
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by the FSAR.
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1. A W A. A. Varela Reactor Inspector
9609030196 960815
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DEKOK96-207 PDR
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l U. 5. ATOMIC ENERGY COMMISSION DIVISION OF COMPLIANCE
REGION I
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CO Iaspection Report No. 50-289/72-07 Subject:
Metropolitan Edison Company
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Three Mile Island Unit 1 Licen., yo, CPPR-40 Location: *1 tree Mile Island, near Middletown, Pa.
Priority
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B Category PWR 831 HWe (B6Wi Type of Licensee:
Type of Inspection: SPecial, Unannounced Dates of Inspection:
April 7, 1972 Dates of Previous Inspection:
March 23-24, 1972
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Principal Insp.etor:
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Y E / 2.
' Date S. A. Fo om, eacpo syctor Accompanying Inspectors:
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Apr'el 2 Y, ; <iy2~
j (Inspection Performed By) E. 'A. Varela, Reactor Inspector Date I
Date Other Accompanying Personnel:
NONE Reviewed B M
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4 ~72.
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. M. 'Howard, Senior Reactor Inspector Date
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Proprietary Information:
NONE
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Management Interview q
The inspector asked when the first North 180 Segment III concrete re-placement was expected to be made. The licensee stated he estimated
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that the first pour on Segment III would be in about three or four I
weeks and CO will be notified at least three days in advance.
l The inspector inquired when final inspection, evaluation, and report on
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conditione and repairs for the South 180" section of the ring girder j
voids would be submitted to DRL. The licensee stated this would be in about three weeks.
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It appears to the inspector that aecond level inspection and documentation on the ring girder repairs conform to the FSAR commitments and the intent of Criteria XVII and XVIII of Ap-
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pendix B to 10 CFR 50.
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2.
Voids in Ring Cirder South 180 Section l
a.
Ouality Control Action on Ring Girder Deficiency by UE&C UE6C QC issued Deficiency Report No. 0447 on April 5, 1972.
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The deficiency is described as follows:
" Pour 3 and 4, elevation 443' to 453'-6" Aximuth 110 to 2880 clockwise, this represents the South 1800 Inspection of the concrete in this area revealed poor consolidation and voids around some bearing plates. The worst area ap-pears to be from D101 SW to D124 SW.
Other areas have small voids, inclusions and honeycombing. Most of the 300 series bearing riates have small voids around tt.em."
The disposition stated in this report calls for:
"1.
Removal of honeycombing, voids and inclusions to be conducted in accordance with guidelines set forth as Attachment 'E' to Construction Procedure CPP-9.
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Below surface verification of sound concrete to proceed by the taking of core drill samples and evaluation thereof as specified in Construction Procedure CCP-9, Paragraph 4. 01. 3."
b.
Inspection of Condition By Inspector Location , Segment Azimuth Tendons Observations
288/273 a.
No apparent voids, no evidence 225/233 of unconsolidation.
b.
Core boring drilled under and parallel to #231,1007. recovery.
III 273/243 101/116 a.
Voids and unconsolidation have 234/249 been chipped out exposes lower quadrant of spiral 18" + back of plate.
b.
Slight voids under lower trumplates due to pocket of " dirt"* 1ef t in form.
Exposed side of boxed out spiral exhibits unconsolidation.
- " dirt" consists of nails, wire, wood and paper
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. -7-e Location Segment Aximuth Tendons Obse rva tions III 213/183 134/139 a.
Upper trumplates have no de- ,, -
349/334 ficiencies at sides and top but 1 edge beneath is missing concrete
as explained in II, 243/213, 117/133, a, above, b.
At lower tomaplates Lift 2/3 construction joint conforms to A-5, but pocketed " dirt" ex-isted at lower edge of all trumplates.
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, l . september 19, 1972 , . i.
, I J. 3. Banderosa, daief. Enacter Construction ! Branch, Bagalatory Operations, EQ ! IETENGL1 TAM EDISW O(BIPANY
1EEEE MIIS 35IJED IEEIS 1 AED 1 j En mEroer no. p-2s9/n-12, so-sto/n-o6 , ! ) h subject inspection report is forwarded for your Laformation and
, referral to Licensing.
] h managensat interview was met held on the day the inspectima une enactoded becanoe of the unevailability of adequate levels of mannse-meet at the site. The===aga===* meeting was held one week later.
Two items of gesaceaformance were identified and documented la eur-letter to the licensee.
We have conceras in the area of electrical cable routing since the , applicant has est fully developed a system for indap==d==* verifice-f ties of cable routing, at least one that la readily field auditable by
- 4, U our inspectors. b applicant is esasiderlag =1==*===i= shesking of jk.1 emble routiag.
' l We recommend that the following questions relating to the reacter controi
censole, identified by ser inspectere, be referred to Licensing for review and resoluties:
1.
The licensee is using a three-light display (only two of which are on at all timas) adjacent to a circuit breaker switch usunted on
the censole to provide informaties for the control room operater relative to the availability of control de en vital circuit breakers, which does met appear to meet the intent of IEEE-279.
f , omct > RO
somest > ,Ho ar j d... . ..... -. .................. ... - 9/19/12 .. .. .. _ Pese AEC-Ste (Rev. 9 53) AECM 0240 ' [ 1 % U b [a v 'N U ,
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bro is a series of terminst arrays asaoeisted with --? : red safeguards siremits which are located in the emble spreading I' room below the osmoele shieb are to be left open. 2 bis estima . M espose the tenminals to hasards r - iming to the and of ! osastruction and to additional basada esseuntered during tresia.
i sheeting and natutenames.
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k separetten criteria to be applied to e6 11ag located hemmeth the esasela has not been defined. The 18 - has tdea the post-ties that the tenniasi a-ray is an autensina of the esameta oves ,
i though lasated in the room belee thatg thhrefore, he need not > satisfy criteria established for trays.
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i . E. M. Howard, drief Reactor Construction Br., 20 I
J I Enclosure
Subject Inspection Report l cc: P. A. Morris, 30 E. D. Thereberg, 30 qsg 1. 3. angelkan, no J. G. Kappler, 20 , i R. Minogue, RS (3) R. S. Boyd, L (2) R. C. DeYoung, L (2) D. J. Skovholt, L (3) H. R. Denton, L (2) j B0 Files , DR contral Files j - t i -. - - -. . - - - - . - - - - - - - - .. - - - - .- }}