IR 05000320/1974005
| ML19220C263 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 08/01/1974 |
| From: | Folsom S, Heishman R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML19220C257 | List: |
| References | |
| 50-320-74-05-01, 50-320-74-5-1, NUDOCS 7904300108 | |
| Download: ML19220C263 (7) | |
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U. S ATOMIC ENERCY CO.uMISSION
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j DIRECTORATE OF REGUMTORY OPERATIONS 1:
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,o.. '50-320/74-05 Docket No.:
50-320 J
RO Inspectien Report
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If Metropolitan Edison Co=pany
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License No.: CPPR-66
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Licensee-
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P.O. Box 542 i3 Priority:
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Reading, Pennsylvania' 19603 A
Category:
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Iocation: Middletevn, Dauphin County, Pennsylvania (Three Mile Island 2)
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Type of Licensce:
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S ecial, Announced
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Type of Inspecticn:
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l Dates of Inspectica: July 9 and 10,1974
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June 27 and 28, 1974 Dates of Previous Inspection:
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Principal Inspector:
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. Seth A. Folsom, Reactor Inspector
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Acco=panying Inspectors:
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Date
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'Other Accenpanying Personnel:
J. B. Henderson, RO:HQ s
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Reviewed By:
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' Da t e R. F. Heish=an, Senior Reactor Inspector
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SUMMARY OF FINDIMd Enforcenent Action
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Licensee Action on Previously Idencified Enforcement Matters Not inspected Desien Chances Polar crane supports incorporated into contain=ent structure concrete.
(Details ~, Paragraph 2)
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Unusu'al Occurrence
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None identified Other Sienificant Findines None identified Manacement Interview The managenent interview was held at the site on July 10, 1974 with the following personnel in attendance:
General Public Utilities Service Cocoany Mr. B. C. Avers, Manager, Quality Assurance
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Mr. R.-W. Heward, Jr., Proj ect Manager
Mr. M. J. Stromberg, Site QA Auditor
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Mr. J. E. Wrigb'
Quality Assurance Manager
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Mr. J. E. Wright, Civil Resident Engineer
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United Encineers and Constructors Mr. V. E. Cichocki, QA/QC Coordinating Superintendent Mr. R. H. Mason, Jr., Job Engineer Burns & Roe
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Mr. W. R. Cobean, Jr., Site Proj ect Manager Mr. M. Giannini, Civil / Structural Liaison Engineer
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The following was ?.iscussed:
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The inspector stated that he had exami:wd the details of the partial embed ent of the te=porarf polar crane in the permanent containment structure concrete.
This included the available documentation relating
e e= bed = cat o;2 ration.
This natter will be referred to the r-
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utr torate of Licensing for review. The licensee acknowledged this l'ftr=ation.
(Details, Paragraph 2.)
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4 DETAII _S
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Persons Contacted
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General Public Utilities Service Cocoany i
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Mr. B. G. Avers, Manager, Quality Assurance i
Mr. R. W. Heward, Jr., Proj ect Manager Mr. M. J. Stromberg, Site QA Auditor
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.r. J. E. Wright, 0"'lity Assurance Manager Mr. J. H. Wright, Civil Resident Engineer United Encineers and Constructors Mr. V. E. Cichocki, QA/QC Coordinating Superintendent Mr. R. F. Mason, Jr. Job Engineer
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Burns & Roe
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Mr. W. R. Cobean, Jr., Site Proj ect Manager Mr. M. Giannini, Civil / Structural Liaison Engineer 2.
Embedment of Polar Succorts in Containment Structure Permanent Concrete Refer to Mr. J. B. Henderson's attached report.
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J Details (
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Ecbed:ent of tc=porary supports in per=anent concrete structure.
Prepared by:
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. Henderson, Senior Mechanical Engineer Date
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T nical Assistance Branch DErectorate of Regulatory Operations
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Dates of Iispection:
July 9-10, 1974
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Reviewed by:
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K. V. Seyfrit, Chiefl Date
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Technical Assistance Branch
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Directorate of Regulatory Operations
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Persons contacted
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B. G. Avers, Quality Assurance Manager, General Public Utilities S-Mee Company (GPUSC)
James H. Wright, Civil Resident Engineer, GPUSJ Matthew Giannini, Site Liason Structural Engineer, Burns & Foe (B&R)
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General
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This part of the inspection was conducted-te exa=ine the docu=eutation of the decision to permanently e bed in Lne structural concrete of the refueling canal, certain te=porary structural steel supports which had
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been installed to support the contain=ent building polar crane pending completion of the contain ent building.
The inspection also included exa=ination of records of work perfor=ance and lir.J':ed examination of work in. progress.
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Background
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During the early stages of the project, as part of the construction sequence plan _ning, the fact was establishr.d that the =ajor equipment to be installed inside containment would be delivered early in the
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O construction sequence.
These =ajor ele =ents consis ted of ~ the reactor vessel, the two stea: generators, and the contain=ent building crane
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bridge and trolley.
Early installation of this equip =ent would eliminate the necessity to provide a large constructica opening in the wall of the contain=ent building.
Based on this, agree =ent was reached between the owner, the AE (B&R), and the constructor, to schedule early co=pletion of the per=anent fcundations for the reactor vessel and the stea=
generators, and to provide a te=porary structure to support the crane girder approxi=ately in its final position, until the contain=ent building had reached a_ degree of co=pletion which would permit support of the crane on its per=anent support syste=.
To i=ple=ent this latter decision, T&R issued, on Dece=ber 19, 1963, Drawing 4143, describing a support syste= consisting of four lattice steel towers, 5 feet square by
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about 136h feet tall, spseed 28 feet on centers one way,108 feet on centers tLe other way.
The towers were founded on the containment building botte= floor and extended approxi=ately to the height of the finished building wall.
They were stiffened by structural angle "X" bracing in tne narrcw (2C foot) direction, and by re=ovable cable "X"
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bracing in the long 1108 foot) direction supple =ented by re=ovable horirontal trusses at the top.
The towers and end panel bracing were
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erected prior to installation of the reactor vessel and stea= generators, the bracing in the side panels was left out for placement access until those vessels had been installed.
Exn-4 nation of construction photographs showed that the reactor vessel was installed on March 29,1972 (the two stea= renerators had already been placed) and that by May 1972, the crane had bee a installed on the te=porary supports.
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E= bed =ent of Towers
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In the original construction sequence, the plan was to delay installation
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of structural concrete internal to the contain=ent building until af ter the contain=ent building had been co=pleted to a point where the crane
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could be positioned on its per=anent supports, and the te=porary supports
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could be renoved.
However, shortly af ter the towers were installed, this plan was =odified, and the decision was reached to c= bed two tcwers in the structural concrete of the fuel handling pool valls, fro = the con-tainment floor to the operating floor, a height of 65 feet. This decision is docucented in Engineering Deviation Request (EDR) 1011, approved March 15, 1972, which states in part.
."The two north towers shall
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recain in place and beco=e e= bedded in the fuel pool wall....". This decision was stated during the inspection to have been =ade in the interest of construction scheduling. Delay of fuel pool construction until after the tcwcrs had been reto"ed would have resulted in a delay and increased cost to the overall construction schedule. The presence of the tower steel -
required =odification of the concrete reinforcing steel arrange =ent. These
=odifications were defined and approved by EDR's #1027 and #1159.
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Work Perfor=ance
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The 5 foot horizontal dimension of each tower is slightly greater than the fuel pool wall thickness.
Thus the 6 x 6 x inch corner angles and the 2 x 2h x 3/16 inch lacing angles were only partly e= bedded in the concrete.
Depending on the local conditions, the forms were either fitted to the angles and concrete was placed solidly, or plastic foa blocks were secured to the for=s to exclude concrete fre= the vicinity of the angle e= bed =ents.
In either case, the specificatica required.
that after the for=s were recoved, any tower steel within 2 inches of the concrete surf ace was to be cut avay, and the concrete was to be locally repaired to provide a =ini=u= 'of 2 inches of concrete cover over tower steel which re=ained e= bedded.
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This work was in progress at the time of the inspection. Where the concrete was being recoved locally to provide access to cut back the e= bedded steel, there was evidence that the original concrete was sound and well placed.
In the areas examined, where the steel had been excised but the excavation had not been refilled.
The steel was
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in all areas re=oved at least 2 inche~s dea,.
Since the repair areas l
were generally several inches wide and several feet long, concrete replacement was by forming and place =ent of fluid ccer-ete.
Place =ent vindows and inspection windows were observed to be located at appropriate
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intervals.
Exa=inatien of replacement cencrete where for=s had been recently re=oved indicated goed consolidation and bond to adjacent concrete.
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One area of particular interest was on the interior sides of the fuel pool vall where re= oval of tower steel to a depth of several inches was required in order to a= bed anchorages for the fuel pool liner.
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This work had been completed at the time of the inspection.
It appeared to have been perfor=ed acceptably.
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