ML20095E221
| ML20095E221 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 08/07/1984 |
| From: | Lucks A STONE & WEBSTER, INC. |
| To: | Harrison J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20095E223 | List: |
| References | |
| MPS-69, NUDOCS 8408240132 | |
| Download: ML20095E221 (43) | |
Text
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1 STONE & WEBSTER MICHIGAN, INC.
PR UC b
P.O. box 2325, BOSTON, M ASSACHUSETTS O2107 D S PA0 1
$GA OL 6C OI i-OTpA FILE //E Mr. J. J. Harrison August 7, 1984 Nuclear Regulatory Commission 799 Roosevelt Road J.O.No.
14358 Glen Ellyn, IL 60137 MPS-69 DOCKET No. 50-329/330 MONTHLY THIRD PARTY ASSESSMENT MEETING MIDLAND NUCLEAR COGENERATION PLANT The protocol governing communications for the Remedial Soils and Construction Completion Programs at the Midland Plant specifies a monthly meeting to dis-cuss third party assessment activities and assigns preparation of the minutes of those meetings to Stone & Webster.
Enclosed are minutes of the meeting held on July 12, 1984.
N A. P. Amoruso A. S. Lucks Project Manager Project Manager CIO Underpinning and Remedial Soils Enclosures cc:
JWCook, CPCo JAMooney, CPCo RAWells, CPCo l
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.h MINUIES OF THE MEETING OF JULY 1984 STATUS OF INDEPENDENT ASSESSMENT OF UNDERPINNING AND REMEDIAL SOILS WORK PURPOSE The purpose of the public meeting was to report the status of the Stone &
Webster Assessment.
SGetAIT' Mr. Lucks opened the meeting by stating that due to cancellation of the June monthly meeting, the meeting this month would cover weekly reports 85 through 93 which corresponds to the period April 29, 1984 through June 30, 1984.
Mr. Lucks then discussed the Assessment Team current staffing level. Prior to suspeasion of construction on June 26, 1984, the Assessment Team had been covering underpinning operations on a seven days per week basis with a staff of four to five engineers on site. With the suspension of construction, the onsite staff has been decreased to two engineers to cover the monitoring and maintenance activities which have continued during the suspension of cons truc tion. The Assessment Team staffing will be maintained at this level pending resolution of construction financing for plant completion.
I Mr. Lucks then stated that D. Benvie would summarize the construction status and Ass essment Team activities for the last two months.
Following Mr. Benvie's ~ presentation, Mr. Lucks stated that W. Craig would provide an update on CP Co and the Contractor's activities in response to Assessment Team recommendations given in the report entitled " Evaluation of Change and Nonconformance Documents" issued in October of 1983.
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a Mr. Benvie began the sununary with a description of the observations and activities performed by the Assessment Team. The major activities are listed below:
Underpinning Construction o
Constructibility Review o
Work Activities f.
Observed activities for the Auxiliary Building Underpinning included extension of the access shaf ts, pier and drif t excavation and lagging, soils stabilization grouting, pier reinforcing steel installation and concrete placement, transfer frame and grillage beam installations, and load transfers.
It was noted that the Ke drif ts were completed through to both UATs. Also, the piers completed in the past two months brings the total to 30 out of the required 57 piers.
The Assessment Team made the following observations:
In response to minor seepage encountered in the E5 pier bell, the o
Contractor exposed only small areas of the bell prior to installation of bell bracing.
Seepage water was effectively diverted away from founding areas of the bell during placement of BX2-14358.06-17 2
0 the concrete mudmat through the use of perimeter and intermittent lateral trenches.
o Soils stabilization grouting observed for the CT 3/10 drop pits indicates that this grouting method continues to be effective.
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Lagging installation and backpacking for piers E/W5, CT 3/10 and o
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Ke 5/9 was performed in accordance with the procedures.
o An inspection by the Ass essment Team of the reinforcing steel installed in piers CT 3/10 and E5 verified that number and location of reinforcing steel, spacing, clear cover, splice lengths, stirrup location, Fox Howlett coupler locations and absolute dimensions were in accordance with the design drawings.
For piers E/WS, E17, CT 3/10 and Kc8, concrete placement technique o
including lif t height, lateral movement, free drop and concrete
- vibration were judged to be in accordance with good construction practice. The Contractor's activities associated with formation of an unplanned construction joint for pier Kc8 were in accordance with design requirements.
An overview of Contractor, Subcontractor and Resident Engineering o
activities associated with the complex load transfers for. the E/W5 grillages and the CT 3/10 piers indicated that these load transfers were accomplished in accordance with procedural-requirements and BX2-14358.06-17 3
the co-ordination effort exhibited by these organizations was good.
It was noted that no detrimental building movement occurred during these loading operations.
The status of the underpinning activities for the SWPS was discussed next.
Significant progress on the SWPS access shafts was made in the past two months.
Installation of the upper level wales and excavation of the east access shaft was completed.
Excavation of the west access shaft below the upper level wales was in progress at the time of suspension of construction.
The quality of the extensive full penetration welds observed by the Assessment Team for the upper level wales was indicative of a high level of workmanship.
Although some difficulty had been experienced with maintaining the backpacking in place, in part due to placement methodology and also because of erosion cased by surface water runoff associated with several heavy rainfalls, the Contractor has modified the method of placement and the type of backpacking used and has taken measures to protect the access shaf t excavation during periods of inclement weather.
As a result, the backpacking installation has improved significantly.
The Assessment Team observed placement of concrete for the BWST ring beam
~ additions.
With the exce ption of one instance, concrete was placed in l
accordance with good construction practice. Inadequate vibration of concrete occurred in a limited area of the BWST ring beam because of heavy reinforcing steel congestion, and as a result, MPQAD is s ued an NCR.
Appropriate modifications were made for subsequent similar concrete placements.
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A review of a recent Resident Engineering crack survey of the BWST foundations indicated the following:
No new enlarged cracks greater than 10 mils were found.
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Crack patterns art unchanged.
o No significant increase in crack widths have occurred since the last survey performed in 1982.
For the cathodic protection trenches, the method of Q backfill placement observed by the Assessment Team including loose lift thickness, number of passes, overlap of passes and type of equipment used was in accordance with procedural requirements.
constructibility review for the FIVP load The Assessment Team attended a transfer.
These reviews are held to:
o Incor pora te construction and engineering input into the final phases of the design.
o Improve clarity of the design documents.
Provide for proper sequencing of construction activities, o
Resolve questions and plan for contingencies.
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%B The Assessment Team noted that participants involved in the review provided pertinent input and were knowledgeable of the subject matter.
Ass essment Team activities associated with QA/QC were discussed.
A description of those activities and Assessment Team observations are as follows:
o MPQAD training sessions associated with the SWPS plate load test and excavation in Q soils areas were judged to be adequate in both content and presentation.
o A training session to familiarize the SWPS subcontractor field engineers with quality requirements for jacking equipment, including quality procurement requirements, manufacturers' equipment doctamentation and jack calibration data was judged by the Assessment Team to be thorough.
A Quality Awareness session held during a craf t " tool box" meeting o
to discuss predetermined hold points and quality criteria associated with belling and excavation of piers was attended by the
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l Assessment Team. It is the opinion of the Team that these tool box sessions serve as an effective means for stressing to the craf tsmen l
the necessity of quality performance associated with their work.
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An overview of QC inspection for instrumentation installation, placement of Q backfill, inspection and testing associated with I
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concrete placement and verification of anchor bolt tensioning indicate that the inspectors performing these activities were knowledgeable of the design requirements and performing associated inspec tion and testing in accordance with MPQAD inspection criteria.
Recent reviews by the Assessment Team of the Contractor's document control "self-audit" results showed that controlled doctanent stations are being adaquately maintained. Implementation of a computerized register for control of the Contractor and Subcontractor design doctsnents and increased clerical staffing levels have aided the Contractor in upgrading their maintenance activities associated with controlled doctanents.
A report summarizing the FSO Quality Engineers (QE) review of the Auxiliary Building Subcontractor's material handling and storage was discussed. It was noted that the Assessment Team will continue to monitor corrective action to address the QE findings which included improper identification of material and storage areas, improper storage of materials and the use of personnel not trained to project procedures.
An overview of the offsite concrete batch plant activities including storage, segre gation and identification of concrete aggregate and performance of aggregate mois ture content calculations required for proportioning batch constituents indicated that these activities were performed satisfactorily.
Mr. Benvie then stanmarized the status of the Nonconformance Identification Reports that were active dtiring the past two months.
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NIR 22 which concerned discrepancies in posting attachments was closed on April 30, 1984. Upgrading of the controlled station was verfied by MPQAD and subsequently by the Assessment Team.
o NIR 25 which was written as a result of deficiencies associated with the use of the maximum load indicator needle on the US Testing concrete compression machine was closed on 5/9/84.
NIR 26 which detailed deviations from procedural requirements for o
concrete air entraiment and aggregate moisture testing was closed on 6/26/84.
The appropriate personnel were reinstructed to the procedural requirements for these tests.
Based on this, the Assessment Team closed out NIR 26.
The final Assessment Team activity was an overview of the following four Work Activity Packages:
o WAP 46 - Permanent Dewatering System Installation in Yard Area.
WAP - Level D Wales, Excavate Y/Z 4A through 4D and 8, Soil Layback o
Kc3 to 4, Kc4 to 5, Kc8 to 9, Kc9 to 10.
i WAP 85 - Tiebacks and, Struts at Piers E/W 2 through E/W9.
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WAP 86 - Support B rackets for Kc5.89, Kc6 and Kc7 - Turbine Building.
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Mr. Benvie concluded his presentation with a slide showing a list of open items as of 6/30/84. The open items are:
o 89-7 Level C Wale Bearing Plate Gap.
o 89-31 Retirement of "One Time Deviation" FCRs.
o 90 -6 SWPS Duct Bank Cracks.
o 91-7 Pier Kc5 Bearing Plates, o
92-14 MPQAD Monitoring of Material Handling and Storage.
o 92-24 FCR Task Force Update.
o 93-5 Concrete Placement for the BWST Ring Beam Addition Within the Valve Pits.
Mr. Benvie stated that all items opened prior to Week 89 have been closed.
Significant past open items which were closed in the last two months include I
the US Testing upgrading activity and implementation of the computerized civil drawing rgister. The remaining open items have been opened within the l
past five weeks.
Mr. Craig began his presentation by stating that he would stanmarize CP Co and the Contractor's activities in response to Assessment Team reconsnendations associated with change and nonconformance documents and present the 1
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Assessment Team evaluation of the responses.
Those recommendations, status of implementation and Assessment Team evaluation are as follows:
o Recomunendation No.
1 - Implementation of a QAP Task Force to identify and define in a clear and concise manner, important quality attributes consistent with the intent of the
- specifications.
The Task Foce reviewed specifications, drawings, and procedures for three construction aress; expansion anchor installation, steel fabrication / erection, and welding.
The review identified procedural changes to enhance inspection and implementation of these construction processes.
Also, the Task Force recommended that a philosophy of content be developed for preparation of inspec tion and construction procedures in new areas.
The most significant recoussendation was that engineering identify the quality attributes to match the significance of temporary construction items.
All the recommendations were submitted to CP Co and were judged acceptable.
The Assessment Team considers the response to be adequate.
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Reconunendation No. 2 - Expedite completion of design and maximize i
engineering support at the site.
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j The Auxiliary Building underpinning design effort is scheduled to be completed this month and the SWPS underpinning design would be completed by 9/84.
It was noted that all calculations with the BX2-14358.06-17 10 i
exception of the Auxiliary Building Phase 4 design and the SWPS Phase 2 calculations have been delivered to the jobsite.
These remaining calculations will be completed and delivered to the jobsite in a time frame suitable to the current schedule and construction activities.
Mr. Craig stated that efforts to maximize engineering support have included expanding the Resident Engineering staffing levels and authority. Also key design personnel have been assigned to the site enabling the Resident staff to answer the majority of NCRs and FCRs on site.
Mr. Craig stated the Assessment Team considers the response to this reconsnendation adequatc.
o Reconunendation No. 3 - Provide for timely processing of Interim FCRs.
. Procedures were revised to eliminate the use of Interim FCRs and Resident Engineering was reorganized to provide a dedicated group i
for handling FCRs.
Also, the FCR process was reviewed by a Task Force comprised of Field and Resident Engineering and l
l reconsnendations which were made to enhance the process are being implemented.
Mr. Craig stated the Assessment Team considers the Contractor's response to this reconsnendation adequate.
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t Recommendation No. 4 - Develop a method of trend analysis to relate o
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the number of NCRs to the level of construction effort.
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9't-MPQAD has developed and implemented a trend analysis based on the level of inspection activity.
Additionally, the Contractor had implemented a trend analysis relating NCRs to the level of construction activity.
The response to this recommendation was considered adequate, o
Recommendation No. 5 - Reduce the processing time for critical NCRs.
A reorganization of Resident Engineering and increased staffing levels have aided in reducing the process time for critical NCRs.
Additionally need dates for NCRs are closely monitored to minimize impac ting the construc tion schedule.
This response was also considered adequate.
Mr. Craig then summarized his presentation as follows:
o The Asses sment Team considers the Centractor's response to all recommendations adequate.
Other quality activities have been generated out of the responses o
to these recoussendations initiated by both Constsners Powe.: and the Contractor.
Pier construction times have been reduced significantly as a result o
of the improved handling of change and nonconformance documents.
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p Ninety percent of all FCRs and NCRs are approved on the jobsite.
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The reorganized Resident Engineering staff is more effective in processing change documents.
o The revised procedures have streamlined the processing of change documents.
Mr. Craig concluded that as a result of the Contractor's response to the recommendations, no further action is required on the part of the Assessment Team.
In response to the three action items from the May public meeting, Mr. Mooney of CP Co stated that J. Meisenheimer would discuss the results of the MPQAD welding audit and the audit of the Instrumentation Subcontractor's activities. It was noted that the third action item, re-examination of cracks in the BWST ring beam additions, was covered in the Stone & Webster Assessment Team presentation.
Mr. Meisenheimer discussed the results of the MPQAD welding audit. A list of the audit findings follows:
Item No.
Des cription OIF (FS0)
Uncontrolled filler material 02F (FSO)
Field Welding Engineer not performing monthly equipment checks 03F (BOP)
Field Walding Engineer not performing monthly equipment checks BX2-14358.06-17 13 1
Item No.
Description 04F (BOP)-
Inconsistencies between original records and copies precludes their being termed duplicate records to meet record storage requiremente 05F (BOP)
Changes made to records were not reviewed by ANI 06F (BOP)
Changes made to essential variables on records without qualifying welders 07F (BOP)
Qualification tests performed to wrong revision of the procedure 08F (BOP)
QA Manuals do not adequately address verification of personnel qualifications.
09F (BOP)
Inspection plans do not adequately verify recording of special process requirements.
OlU (BOP)
Essential variable different on one original record and duplicate copy 02U (BOP)
Changes made to records without apparent justification for change Mr. Meisenheimer noted that the first two findings were related to the underpinning work (FS0) while the remaining findings pertained to the Balance of Plant (BOP).
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Hr. Meisenheimer stated that the items with the exception of 04F to 07F and 09F have been closed out.
These items which involve changes to welding l
records and review of welding certifications are presently under review and l-l i
are expected to be closed out during 8/84.
Mr. Meisenheimer noted if an i
indeterminate situation exists upon completion of the review, nonconformance i
reports will be written.
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l Mr. Meisenheimer then reviewed the MPQAD audit results of the Instrumentation l
Subcontractor. The following is a list of the audit findings:
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Item No. -
Description OlF WJE QA Manager not maintaining original records 02F Equipment location not entered on forms 03F Equipment calibration forms not being maintained 04F Checker signitures missing from forms 05F Multiple listing of equipment on the same record 06F Reports not in accordance with format 07F Controlled copy of WJE QA manual not available 08F Data not recorded on proper forms 09F NCRs not initiated for nonconforming items 10F Procedures do not address all training requirements 01U No document identifying QA records and retention times 02U Equipment receipt inspection responsibility not clearly identified
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Mr. Meisemheimer noted that items 06F, 07F, and 09F were the only findings that have not been closed.
It is expected that these items' will be closed during 7/84.
Mr. Meisenheimer summarized his presentation by stating that the results of the welding audit indicate that in the area of underpinning, the Subcontac tor 's welding activities are satis f ac tory.
The results of the BX2-14358.06-17 15
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Instrumentation Subcontractor audit indicate that implementation of procedural requirements is adequate.
However, more diligence on the part of the Subcontractor is required in implementing their QA program.
QUESTIONS AND ANSWERS The NRC asked several questions concerning items included in Weekly Reports 85-93.
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The NRC asked how many people participated in the information gathering and preparation of the report on " Evaluation of Change and Nonconformance Documents." The evaluation and report was the combined effort of Mr. Craig and members of the Assessment Team assigned to Midland.
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Did the s co pe - to the change document evaluation cover more than Remedial Soils by crossing over into any Balance-of-Plant / Soils interface area? The effort was directed at soils work but Mr. Craig said was aware of the areas where interface ac tivities required responses.
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With reference to Item 85-4, the NRC requested an update on the use of onetime deviation FCRs. The Assessment Team stated that the use i
of onetime deviation-FCRs is beign minimized by direct incorporation of FCRs onto the drawings or reference by brief description.
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4.
Item 89-5 reported a discrepancy in readings between electrical and dial guage readouts for an extensometer at the SWPS.
How was the discrepancy explained? Stone & Webster reported that moisture had entered the electrical guage causing the malfunction. CP Co stated the' situation had been corrected.
-5.
With reference to Item 89-10, the NRC stated that if the access shaft soldier piles had been installed to Q standards, the condition involving two piles not driven to full depth might not have occurred.
6.
With reference to Item 89-21, has a problem developed concerning the clarity of issued drawings?
Stone & Webster stated that the I
comunents referred to in Item 89-21 were on two specific drawings that were in the review cycle prior. to release.
The Contractor agreed with the Team's observation and had the drawings cleaned up.
The Assessment Team does not see a generic' problem in this area.
7.
In Weekly Report 90, page 1, why is drypacking being allowed in the underpinning work? It was explained that drypacking is allowed on
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temporary piers but not on permanent piers.
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8.
With reference to Item 90-19, were NCRs issued on the two short piles in the access shaf t? The reply was that no NCRs were issued because the installation was originally non-Q. The NRC stated that since the zone below el 609 is now designated Q, the piles should also be considered Q.
CP Co will reply at the next meeting.
9.
A clarification was requested on the continued use of conditional releases, as was the case described in Item 90-28. CP Co explained that conditional releases are not used frequently but there are instances where they can be appropriately applied.
10.
With reference to Weekly Report 92, page 3, concerning Assessment Team observations of proper implementation of storage requirements, the NRC asked *f Stone & Webster had identified the concern. The reply was that FSO had properly identified and reported the deficiencies. The Assessment Team reported that corrective action was underway.
11.
Was Itc= 92-7 still open? The Assessment Team referred to-Item 91-7 which relates to 92-7 and is still listed as an open item.
12.
With respect to Item 93-7, the NRC asked for an Assessment Team opinion on the nature and cause of the cracks at the duct bank near l
the SWPS.
The Assessment Team replied that CTL was. preparing a I
report and the Team would review the report.
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P REQUIRED ACTION No open action items are required for the Assessment Team from this meeting.
The following item remains open for CP Co:
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' Consideration will be given to the need for an NCR with respect to the two short access shaf t soldier piles.
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MINITIES OF THE MEETING ON JULY 12, 1984 STATUS OF CONSTRUCTION IMPLEMENTATION OVERVIEW (CIO) PROGRAM PURPOSE To discuss Third Party Overview activities of S tone & Webster Engineering Corporation (SWEC) and problems encountered regarding the Construction Completion Program (CCP) during May and June 1984.
SUMMARY
- Mr. A.
P. Amoruso, Project Manager for the CIO Program, opened the discussion with a sususary of CIO activity during May and June 1984.
Mr.
J.
E.
Karr reviewed the results of CIO assessments diaring May and June of
- ilrogram, the Heating, the
Ventilating, and Air-Conditioning (HVAC) Program, and the Diesel Generator (DG)
Program.
f Site work in this period was limited, having suffered a slowdown and eventual stoppage due to the continuing financial difficulties f aced by Consumers Power Company (CPCo).
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i Within the NSSS, the principal activity was hanger reinspection.
CIO continued l
l to monitor the work that was in progress.
One CIO item relative to the ASME l
code was reported.
This related to an inconsistency between the FSAR, the NSSS contract, and implementing specifications on the correct edition / addenda of the ASME Boiler & Pressure Vessel Code to be applied to NSSS pipe support l
- installation work.
One of the areas-_. affected was the 1
required training and certification of inspection personnel for visual inspection of welds.
The later (1974) edition of the ASME code required certification to the requirements of the American Society for Nondestructive Testing. Earlier versions of the AS)E code did not require this.
In this case, Babcock & Wilcox (B&W) halted inspection work and recertified the personnel.
Where necessary, reinspection was performed, and the work is now proceeding satis f ac torily.
There were no additional CIO items or NIRs generated in May or June.
In the DG Program, reinstallation of the interconnecting piping began.
It was subsequently halted.
CIO monitored the work that was performed, and that work proceeded satisf actorily, with no items of concern or nonconformances noted.
In the HVAC Program, installation work continued at the beginning of this reporting period in the control room, while components were being fabricated in the onsite shop prior to installation in the control room.
CIO monitored that work while it was in progress and additionally followed up on previous items relative to procedure revisions for welder qualification.
Both areas were satisf actory with no additional CIO items of concern or nonconformances noted.
The principal work activity for CIO during this period was within the CCP.
Status Assessment:
Additionally, the Quality Verification Program and the Hanger Reinspection Program were reviewed and evaluated.
CIO also reviewed the Phase 2 work that was accomplished.
Evaluations of generic issues relative to document control, NRC comunitments, and 10CFR50, Appendix B implementation continued; and we also concluded an update review and evaluation of PQCIs issued 2
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to date. The majority of the CCP work was for the Phase 1 to Phase 2 transition of Module 120D.
CIO reviewed and evaluated the preparatory work for the transition between Phase 1 and Phase 2 and began preparation for a similar evaluation on the next Module-120J (another part of the auxiliary building).
CCP activity during May and June also took place in the east pipeway, the auxiliary building, the control tower, the reactor building, the service water pumphouse, and the diesel generator building.
Within the reactor buildica, the fuel pool, which had not been active prior to this reporting period, became active for electrical, mechanical disciplines and the hanger reinspection program.
At the beginning of June, work was completed in the lower portion of the Service Water Pumphouse, and this area was flooded in order to support the turbine roll.
In the area of status assessment, CIO Item No.
091 was identified.
P rocedurally, it is required to conduct an initial walkdown prior to beginning status assessment activities.
We found no indication that the initial walkdown was conducted.
No other areas of concern or items of nonconformance were identified.
Within the quality verification program, there were five CIO items and two Nonconformance Identification Reports (NIRs) generated during May and June. The first was Item No. 080.
It dealt with the availability of personnel certified to those procedures which it appeared, at the time, would be needed in support of Phase 2 work in Module 120D.
The final outcome of this item is that CIO had misunders tood the initial information provided and there was not, in fact, a problem.
The people were available and were certified to conduct the required work.
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j ktens 081 and ' 087 dealt with the inaccessible attribute program.
Item 081 discussed some welds in the service water pump structure that had been coated with a bituminous type material and that were designated as inaccessible upon initial inspection.
CIO requested an explanation of this since other similar i
welds had been cleaned and reins pec ted.
The initial answer did not provide i
sufficient justification for classifying those welds inaccessible.
CIO l
therefore closed Ites 081 and issued Item M7 requesting a further response.
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Item No. 083 also dealt with the inaccessible attribute program relative to cable, and requested clarification of intentions relative to declaring cable inaccessible.
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i Item 064 dealt with the results of an overinspection performed by CIO in Module
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i 800 (Service Water Pumphouse), which identified a number of items relative to documentation which were not completed in accordance with the applicable I
procedures.
.i Of the two MIRs, one was discussed at the May meeting.
This was identified in the early part of May and was available at that time.
This has to do with the separation between electrical conduit and cable tray.
At that time, the expected answer was that the installation had not been completed and covers would be installed on the cable tray so that the three-foot separation criteria f
between uncovered tray and conduit would not apply.
This NIR has not been closed out as yet.
NIR 033 is related to CIO Items 081 and 087 and documents some specific discrepancies in Module 800 inspection results.
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i Within the hanger reinspection program, to date, there have been about 800
' hangers reinspected.
CIO has been following this activity with procedure reviews,' documentation checks, and overinspection of 'the work performed.
There was one CIO item and one NIR initiated against the hanger program during this period.
These, considering the magnitude of work, are not particularly significant.
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Item 090 identifies conflicts within th hanger reinspection procedures concerning information reporting and the specific reviews to be conducted for previous work.
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NIR 037 documents a single instance. of.,a hanger which does not conform with the
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latest design drawing.
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In the area of generic issues, CIO' ' continued to follow the long-term document control corrective action.
In one area'of'-that corrective action, the consolidation of all document control functions into one single group operating throughout the job site has not progressed as originally scheduled.
This is a result of the conditions on the proj ect, where work has been slow, and the consolidation effort has not taken place as rapidly as originally anticipated.
Other areas of the corrective action program are proceeding acceptably and essentially on schedule.
-s CIO concluded an evaluation of the implementation of 10CFR50, Appendix B, as reflected in CPCo's Quality Assurance Program.
This evaluation reviewed e
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implementation at the program level of the 18 criteria as amplified in the NRC's Standard Review Plan.
Of 226 attribute checks made, 223 were satisfactory, a very good evaluation.
There were two minor CIO items that resulted directly from this review and one related item that are identified in CIO Items 082, 089, and 092.
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Item 082 contains recommendations to the Jackson audit group relative to the coordination of their activities with the site.
4 Item 089 did not come directly out of this evaluation, but as part of our review, we looked at an audit of site procurement practices.
We questioned whether procurement practices would be audited in Ann Arbor with the same scope as on the site.
Item 092 is again relatively minor.
It identifies an inconsistency between documents which specify those regulatory and national codes and standards which are to be retained as plant records.
One document indicates they will not be retained; another document indicates they will be retained until plant completion.
In view of the project commitment to N45.2.9, CIO asked for a clarification of the intention regarding retention of these documents.
For Project Quality Control Instruction (PQCIs), we did an update review and In also expanded the scope of the initial review which was conducted last year.
l addition to looking at technical adequacy, we also reviewed the PQCIs agains t crEteria derived from NUREG 0278; the criteria are for procedure usability, i
i clarity, and effectiveness.
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CIO Item 085 was generated as a result of this evaluation.
It contains a substantial list of discrepancies, but given the full scope of the evaluation (some 70 procedures reviewed for 34 attributes each), the overall procedural base is in acceptable condition.
As previously indicated, the majority of CIO effort during this period related to the evaluation of Phase 1 activity and the readiness for Phase 2 activity in Module 120D, the Auxiliary Feedwater Pump Room.
In Module 120D, CIO was able to evaluate the integrated results of the total Phase 1 effort.
In conduc ting this review, CIO began by attending the Executive Management Review Committee meeting during which various CCP participants presented to the management of CPCo and Bechtel Engineering (Bechtel) the results of their Phase I work.
Taking the information presented in that meeting, CIO then conducted a 100 percent final inspection of the hardware in the module.
A nonstatistical representative sample of that hardware's documentation was developed and reviewed.
CIO also reviewed readiness for Phase 2 by reviewing procedure and personnel availability and readiness to proceed with the program of construction work.
d During the evaluation several secondary items which needed to be closed out, or at least evaluated for potential impact on Phase 2 work,. we re also reviewed.
These related to training, to document control, to previous CIO open items, and previous NIRs.
As a result of this overall evaluation, CIO issued one item, Number 088, which documented generic concerns with the program implementation.
Three NIRs were 7
_, _ _. ~. _ _ _ _ _ _ _. -
also issued, one to document discrepancies with plant hardware, one to document discrepancies with the documentation created during Phase 1, and one to document areas where procedures had not been followed in implementing Phase 1 of the CCP, In summary, there were three conclusions. The first conclusion was that Phase I had not been effectively implemented for 120D.
The numbers and kinds of items that were identified by CIO indicated that there was insufficient program integration above the inspector / field engineer level to provide confidence that the full scope program had been effectively implemented and documented.
The second conclusion was that in our evaluation of plant hardware, program implementation aside, the hardware was in good condition. There were some minor hardware items relative to configuration, cleanliness, and inplant storage of equipment, but as a whole, the plant hardware was, in f act, in good condition.
i.
The third conclusion was that upon completion of corrective action on the NIRs, CIO was satisfied that all open-work items had been effectively picked up in the
" to go" work list or the Construction Punch List, and there was no reason to l
i i
restrain Phase 2 work.
CPCo and the architect engineer could be permitted to proceed with the completion of the work.
Shortly af ter that, a release was also obtained from the NRC to proceed with the Phase 2 work in the module.
Corrective action is either underway or completed for the generic concerns in CIO. Item 088.
During several meetings with CPCo, CIO has reviewed the changes being made, and believes it will ensure closer coordination between the various groups performing Phase 1 work.
CIO is also preparing for a review of Module 120J, the next module to be completed that is similar to that for Module 120D.
1 i
4s an update, the Status Assessment Program, overall, is about 19 percent l-complete; the Quality Verification Program is about 5 percent completa, giving overall CCP completion of around 10 percent.
8
D'uring this period, a substantial number of CIO items and NIRs were closed. As 1
l of the last meeting, there were 21 open items, one " Hold" point, and 12 NCRs.
During the month, CIO closed 13 items and 14 NIRs.
At the end of June, this left 21 open items, 1 " Hold" point, and 5 NIRs.
Beginning three meetings ago, CIO started reporting on overall performance, and I would like to offer a few additional words about this topic this month.
We have been referring to this as trend analysis of overall performance indicators for the total project.
In fact, it is not trend analysis in the traditional manner of this industry. There are some things affecting what is being reported that are inherent in the CIO operation and that result from the project status that makes this really an indicator of how performance is going at a point in time rather than a trend.
Traditional 1 ~, trend analysis will pick an activity and follow it for a long period of time, and come up with some indication of whether quality is improving or getting worse, and will analyze results in order to arrive at a cause and, where necessary, corrective action.
The CIO operation is structured to encapsulate activities, to look at an activity, evaluate it, and then close it out.
Long-term trends will not show up l
under these conditions.
What is reflected by CIO information are specific i
problem areas that were identified in fairly confined disciplines, resolved, and I
then closed out.
1 The other thing that affects the information is the nature of the project.
At j
this time, there is not a homogeneous flow of activity. Things are happening in f
'.ittle envelopes.
Activity begins and stops, so there is no flow of work that t
r
a can indicate a trend in work performance.
All that is indicated at this time is reported during the month of June, for example, is that in looking and what at the Phase I to Phase 2 transition for Module 120D, the results exceeded the satisfactory performance threshold of 5 percent.
system / area status However, if you also look at the other areas, such as assessment,
- training, pipe and component support
- welding, and welder qualification, there is a O percent reject rate, so the scope of the information available must be related to what is really happening on the project.
That concludes the formal CIO presentation.
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Mr. Livermore, USNRC - Before you continue, let me ask you th9 cam 2 qu20tiens I asked during the soils presentation.
Do you see any areas of improvement that might be instituted, such as coordination, cooperation, management.
Do you see any potential problems?
Mr. Karr, SWEC - We have reviewed with CPCo, and also the NRC, areas where we believe a critical review of the CCP will not only enhance their chances for success in implementation but will also contribute to the efficiency of the program and improve the overall project chances for success.
These areas are under evaluation by CPCo.
CIO is receiving very good response from CPCo management.
It is working sery diligently right now to demonstrate that is has firm grasp on problems identified in the past and is going to resolve them.
a If the work ongoing within CFCo at this time is pressed to its logical conclusion, it should eliminate potential future problems.
Mr. Amoruso, SWEC - Next, Mr. Robert Burns will sununarize the last corporate audit of the CIO program.
Mr. Burns, SWEC - During the period April 30 to May 4, 1984, a second corporate QA audit of CIO activity took place.
In this audit, we found one item of concern of the areas checked, which included all CCP related activity, procedural activities and personnel certifications.
The area of concern was in personnel work assignments and related certification. There was one instance in Audit No. 1 of difficulties in this area, and in Audit No.
2, it turned up again.
In the checklists that we verified, there were four instances where individuals, although qualified to perform activity, did not have appropriate i
l l
11
certifiestions.
The corrective action taken was in multiple areas.
First of all, the supervisors were reinstructed in work assignment requirements.
The individuals within each group were instructed on acceptance of work assignments.
Also, a cross-certification program was undertaken to provide more flexibility in personnel assignment.
Subsequently, we reviewed and/or reinspected the work performed by the individuals in question, and there were no differences between the reinspection results and the original res ul ts.
This matter has been responded to and closed. However, in subsequent follow-ups, corporate review of the activity will be continued to see that preventive action has been effective.
Mr. Livermore, USNRC - How many people were involved in this?
i 1
Mr. Burns, SEC - Four in the second audit, and one in the first audit.
Mr. Livermore, USNRC - Was there a causal factor when this happened?
Mr.
Burns, SE C - We went over the material and interviewed some of the individuals involved.
There were three contributers to the situation.
- First, the supervisors looked at the task at hand and the individual's qualifications as opposed to-certification.
Second, we were overly restrictive in classifying work areas, such as document control, training, and evaluation that could be cross-classified as either verification or evaluation.
Thi rd, some people had been in the process of being cross-certified, and we did not expedite the Paperwork which was in the process of traveling through the system.
T 1
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Mr. Amoruso, SWEC - I would like to close by making a statement on CIO manning.
The work performed during this period was less than anticipated, and the CIO staff was reduced accordingly.
It is now at 28.
The number will increase or decrease as needed to support the ongoing work.
1 4
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QUESTIONS AND ANSWERS Mr. Hiland, USNRC - In CIO Report No. 47, Section 3, paragraph C, it states CPCo identified cracks in the wear rings on the auxiliary feedwater pumps and issued a -10CFR50.55(e) report on those cracks; did you evaluate that?
i Mr. Harris, CPCo - There has been no 55(e) report issued as yet.
Mr. Quamme, CPCo - We will check on that and respond.
Mr. Hiland, USNRC - I understand you did write NCRs?
i
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Mr. Quasune, CPCo - Yes.
3 Mr. Hiland, USNRC - In CIO Reports 48 and 49, SWEC identified a concern which prompted B&W to issue a stop work order due to-weld inspectors not having an inspection qualification.
We were under the impression that significant SWEC 1
concerns would be formally documented in an item notification form.
Was one issued for this specific finding?
Mr. Karr, SWEC - This was issued in a more generic statement.
The item which issued documented discrepancies in the ASME Code edition and addenda, which was
[
applied to the B&W work.
This was the discrepancy between using the 1974 edition and using the 1970 edition through the sunumer of 1973 addenda.
The reason why inspector qualification comes up is that up through the summer.1973 addenda of the Code, it did not require weld inspector certification to ASNT.
14
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fn the 1974 edition of the code, welding inspector certification to ASNT was -
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included so this is a subset of the overall question of which edition and addenda of the ASPE code applied to the B&W work.
Mr. Hiland, USNRC - I am f amiliar with the item you were addressing.
- However, since there a stop work order, we believe that some more formal documentation should be provided.
Mr. Karr, SWEC - Where a concern is documented within the utility, the architect engineers, or a subcontractor program, via NCR or stop work action, we are not going to replicate that documentation.
You can find that discussed within our program plan.
Since the subcontractor in this case took action under his own program, our intent is not to duplicate that work.
Mr. Burgess, USNRS - Our concern here is that the code case was brought up about two weeks prior to the stop work being issued, and another two weeks went by before the NRC was notified of the actual B&W stop work order.
The question is why the time lag?
Mr. Quassne, CPCo - We recognized the deficiency in that area and the proper instructions have been given to the subcontractors.
We have tightened that up and any stop work activity, regardless of where it originates, will be reported to the NRC.
Mr. Burgess, USNRS - What actions did B&W take to specifically close that?
15
Mr. Qusame. CPCo - B&W certified ITS inspectors to the code and reinspected the hardware where necessary.
Mr. Hiland, USNRC - I would like to have a package which documents the B&W stop work order and the accepted corrective action.
Mr. Quamme, CPCo - We will provide that.
Mr. Livermore, USNRC - We will carry this as an open item for the next meeting.
Mr. Hiland, USNRC - In CIO Reports 52 and 53, SWEC identified the fact that you were looking into an allegation by a former CPCo employee.
There has been no subsequent follow-up in Reports 54 and 55.
Can you provide the status of that investigation?
- Mr. Karr, SWEC - We have completed the work as far as we can.
The allegation deals with the application of a concrete bonding agent.
This has also been picked up within CPCo's evaluation system.
Bechtel has been requested by CPCo to provide an evaluation of the potential safety implication of use.
At this point in time, it appears that the NCR which was part of the original allegation may have been closed out prematurely.
However, it was also an existing item within the CPCo Audit Program, and an evaluatico was being conducted under that program.
Mr. Hiland, USNRC - We would like you to continue to status that activity in your next re ports, until we get a closure on it.
We need some mechanism to follow these activities.
16 J
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Mr. Karr, SWEC - We will do it.
Mr. Hiland, USNRC - CPCo, would you like to provide the status of your review?
Mr. Quamme, CPCo - We have a welderete program that is in process at this point in time. The completion of the program is scheduled for July 27, 1984, at which r
time we will be able to respond to the overall question of use of welderete onsite, both past and future.
Bechtel is currently evaluating the whole
~
problem.
We reviewed their program.
Bechtel covers all the important attributes of the question, and we are waiting for their completion.
Was the technical closure of that NCR based on the Mr. Burgess, USNRC preliminary review?
Mr. Harris, CPCo - No, It was a CPCo Project Audit Division (PAD) closure of the NCR.
The CPCo auditors initiated the original NCR.
It was closed, perhaps prematurely.
PAD has initiated a new NCR dealing with the technical aspects of the product, and that is what is going to be resolved by this CPCo report.
We are still trying to clear the original NCR concern.
Mr. Livermore, USNRC - How long has this gone on?
Mr. Harris - It was originally identified in August of 1983 on Audit AFR831106F.
Mr. Burgess, USNRC - Is that correct, last August?
17
o Mr. Karr, SWEC - Yes, the audit finding was identified back in August of 1983.
The allegation was not made until June 5,1984.
Mr. Livermore, USNRC - You have been working on this for a year?
It Mr. Harris, CPCo - When the NCR was initiated, the welderete was tagged out.
was not used until the original NCR was closed.
Mr. Livermore, USNRC - The timeliness of corrective action is not very good.
Are you going to close it out?
Mr. Quanune, CPCo - July 27, 1984, is the date we intend to have in our hands all the information necessary.
from Mr. Hiland, USNRC - In CIO Report 55, we noted that based on a comunitment CPCo to provide procedures, CIO closed Item 085.
In the past, those items have remained open pending completion activity on the part of CPCo.
Would you explain how an item is closed or lef t open pending completion activities?
Mr. Karr, SWEC - In many ways, that is a subjective decision.
If the closure action is one that is finite and measurable, then we will generally hold the item open until everything has been completed.
Something like Item 085 can exist virtually forever.
Some of the PQCIs are not even scheduled to be used We believed once we reviewed the input of the change information to for a year.
the system and that was cataloged and scheduled for incorporation, CIO would not hold that particular item open.
18
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Mr. Miland, USIEtC - You are satisfied that mechanisms are in place to ensure there was a change to procedures that would be implesented?
Mr. Karr. SIEC - We review each of the POCIs as they come up for use.
We will have a backcheck on that.
Mr. Miland, USNRC - Can CPCo provide
- s with an update of the corrective action on document control and what are the current plans for completion?
Mr. Quanne. CPCo - This the long-term correction action plan identified earlier in the year. Within a period of 4 to 5 weeks, all items identified on the long-term corrective action plan will be implemented.
Final issue of the document control procedures that were a part of that long-term action plan will be within a week. They have all been either issued, or they are in the review cycle. The collapsing of all the stations and the operators of those stations under the document control organization is fairly complete.
That will probably be completed by mid-August.
That is an extra step which was not a part of our long-term corrective action plan.
A decision has been made to pull those in also to give us consistency.
The Bechtel self-audit groups have been in place 2 1/2 months. That action item is complete. The overview group within MP@D has been operating for a period of 2 to 3 months.
In both Instances, the number of discrepancies found by those audit groups,has been on the decline, and currently, MP@D reports less than 1 percent on any audit it is performing.
So, we are within weeks of completing the entire long-term corrective action plan.
The plan has been effective, and we are very satisfied with the results today.
19 e
9 Mr. Hiland, USNRC The five document control stations each have a terminal today, and those terminals will be audited July 23, 1984 by MPQAD?
Mr. Quanume, CPCo - Yes, that will be a part of the overall audit.
Mr. Hiland, USNRC - Action Items 081 and 087.
This has to do with the removal of the coal tar from the weld deemed to be inaccessible.
We noted in your initial response that the MPQAD manager was the decision maker on that.
What was the technical input to him to make that decision, that removal of coal tar would make the previous NDE that was performed invalid?
Mr. Harris, CPCo - The epoxy coal tar substance is very difficult to remove.
The way to remove it would be to sandblast it off. That would result in peening of the welds so you could not come back and get a valid penetrant examination of the welds.
Mr. Hiland, USNRC - The response I read stated that if the epoxy was removed it would invalidate previous liquid penetrate examinations.
I war looking for the technical answer as to why.
Mr. Harris, CPCo - As far as I know, that would not invalidate the previous it would make the surface unacceptable for a valid new inspection.
ones; Mr. Hiland, USNRC - CIO Action Item 83 has to do with the MPQAD Procedure N12, which requires documentation of inaccessible items.
We have read the initial 20
response from CPCo to the SEC item.
We found that response unacceptable, even before SWC comments on it, and I guess the first thing I would like to know; are you aware that a @R was written on this subject several months ago?
Mr. Harris, CPCo - No, I am not.
l Mr. Hiland, USNRC - I an aware it was.
About 5 months ago, there was a @R written on the same subject. I think it was voided; is that correct?
Mr. Karr, SEC - I do not have that.
- Mr. Hiland, USNRC The situation is that the PQCI
- allows, via special Instruction No. 6, the quality control engineer to determine if an item is inaccessible, and so note it on his inspection report.
When SEC wrote this item, it asked for a response relative to Procedure N12. Your response says the PQCI was followed, and therefore, there is no probles.
That was not the point.
The N12 Procedure requires you to document inaccessible items.
You answered 1
that your PQCI was followed.
Nobody disputed that.
What we need to look at is i
i whether the Py?I that is being used meets the Procedure N12.
Mr. Quamme, CPCo - We will look at that.
Mr. Hiland, CPCo - We think that is an open item, and we would like to hear a presentation at next month's meeting.
I have a general note on the weekly reports from SE C.
We noted a reduction in the amount of detail in Section 3 of the reports, and we would like you to try to work on that and bring the detail in Section '3' back up to the level that it was about 6 months ago.
i 21
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s Mr. Karr, SWEC - I would make one comment on that.
The amount of detail and specific information is directly related to the project activity. At this point we are sometimes in time, with the muount of ongoing work activity available, struggling to provide a lot of information.
Mr. Burgess, USNRS - We understand; it is just a comment.
Mr. Hiland, USNRC - Those are all the questions I have.
Mr. Livermore, USNRC - I would like to make some conunents on Module 120D and the forthcoming 120J reinspection program.
These are team consents, compliments of Mr. Harrison from the whole team.
They are directed to CPCo. We are not happy with your implementation and results of the reinspection of Module 120D.
The SWEC overview pointed out a number of weaknesses, mistakes, program, and procedure problems.
Your corrective action, we believe, was not very timely, and we believe your program needs management help.
Now before anybody present goes running off the deep end here, I want to say in retrospect; we chalk up a great deal of these problems to firs t-run misques, ironing out the kinks of the ne'w system.
New teams were put together, etc; and i
we realize a certain amount of problems are to be expected.
So, I can say in sumnation; therefore, the module 120J, the forthcoming one, our expectations of your actions or your implementations are going to be very high.
It should be near 100 percent error-f ree. That should be a smooth running operation, and we would look to it as a management capability demonstration.
We are expecting to gain confidence in your abilities.
22
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w Mr. Quanune, CPCo - CPCo and Bechtel are not 100 percent satisfied either.
We recognize that we had a new progran.
I also have concluded that the program needs enhancement, which we have implemented, and we too fully expect that the result of 120J will be superior to that of 120D.
Mr. Livermore, USNRC - I would like to open the meeting to any questions from the public. If not, I thank you very much.
ACTION ITEMi:
1.
CPCo is to provde the NRC with the package of information which documents the Stop Work Order issued by B&W for inspection of ASME III Welding.
the next meeting on the use of a POCI (reported in CIO 2.
CPCo is to report at Item No. 083) as not fulfilling the requirements of Procedure No. N12 for inaccessible item identification and reporting..
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Sf0NE & *EBStE3 viCmGAN INC g[
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$JF File 9
y 10, 1984 United States Nuclear Regulatory Comission Midla-d Site Resident Office Route 7 J.O. No. 14358 Midland, Michigan Ref. MPF 85 Attention: Mr. Cook DOCKET NO. 50-339/330 MIDLAND PLA!C UNITS 1 & 2 INDEPENDENT ASSESSMENT OF UNDERPINNING REPORT NO. 85 A copy of the Independent Assessment of Underpinning Weekly Report No. 85 for the period of April 29, 1984 through May 4, 1984 is enclosed with this letter. Included as attachments are the minutes of the daily meetings held during the week between members of the Assess m t Team and Site Engineering, Construction and Quality Assurance personnel.
If you have any questions with respect to this report please contact me at (617) 589-2067.
A. Stanley Lucks Project Manager Enclosures ASL/bd cc:
JJHarrison (ene), US NRC Glen Ellyn IL Grace Dow Memorial Library (enc)
DQuamme (enc) CP Co Midland (site)
JMooney (enc) CP Co Jackson JMeisenheimer (enc) MPQAD Midland (site) gg14 N igy.
T9552 L 697'; -
I J.O. No. 14358 MidlandPlantO m
J.
Unita 1 & 2 (J
Independent Assessment of Undarpinning Weekly Report No. 85 April 29, 1984 through May 4, 1984 Personnel on Site Stone & Webster Michigan, Inc.
P. Majeski 4/29 - 5/1 D. Benvie 4/30 - 5/4 D. Zito 4/30 - 5/4 W. Kilker 5/3 - 5/5 L. Rouen 5/1 - 5/5 Parsons Brinckerhoff Michigan, Inc.
J. Oliveira 4/29 - 5/1 B. Metros 5/2 - 5/5 Meetings Attended Date Represented Purpose 4/30 - 5/4 Stone & Webster Daily Assessment Bechtel Team Meeting Consumers Power Parsons Underpinning and Remedial Soils - Construction Pier E5: Excavation of the bell area was initiated. One short side and half of one long side were cortpleted. Be belled sections are completely supported with steel plating. Minor water seepage continues to enter the bell area from above. Excavation and support of the containment drop pit was completed. We area between the pier and the containrtent drop pit was fortred in preparation for the concrete working slab installation.
Pier E17: The center portion of the enlarged straight shaft pier was excavated and the mudrtat installed.
Piers CT 3/10: The drop pit excavations and supports were completed to El. 594 ft.
Pier W5: Excavation and support of the bell area was cortpleted. De-drop pit excavation at the containctent was also cortpleted and the forrtwork placed for the concrete working slab between the pier and drop pit.
9
'J O.. No. 14358 2
Midland Plant (
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Unito 1 & 2 Independent Assessment of Underpinning Pier W17: No further activity was performed pending fabrication of lagging materials to support an enlarged straight shafted pier.
Kc5 Drift: h e finger drift to the pier was completed.
Access Shaft level "C" Wales: Fit-up and welding of the wales continued in both shafts.
- SWPS: Installation of the upper level wales and struts continued on the north and west sides. Excavation and lagging was cortpleted to El. 626 along the east side and easternitost 20 ft of the north side.
Extension of the bentonite seal between the SWPS and the circulating water
- intake structure was cortpleted. The base of the seal was extended to pene-trate through the rip rap layer on the front side of these structures and prevent leakage at tne joint between the structures.
- BWSTs: Concrete was placed along the north section of the ring beam ex-tension at Unit 1.
Reinforcing steel and fontwork installation continued at Unit 2.
. Cathodic Protection: Trench excavation work continued..
Assessrtent Teart Observations - Construction During the past week, the construction effort for the auxiliary building underpinning concentrated on the excavation of-five piers and drifting to two other piers. The Assessitent Team observed the bell excavations for piers E/W5, concrete rtudicat placercent for piers E5 and E17, soils stabilization grouting for CT 3/10 and drifting to pier Kc5.
Minor water seepage was encountered during belling of the E5 pier. L1 order to preclude sloughing of the in-place soil, the Contractor was careful to expose only sitall areas of the bell prior to the installation of plate supports and bracing. Although soil conditions for pier W5 appeared stable,.
the Contractor elected to plate and brace the entire bell. he Assessrtent l
Team believes these steasures undertaken to ensure the stability of the E/W5 bells were prudent. Placettent of the grout rindicat for the E5 and E17 piers was in accordance with the proceedures. Prior to grout placertent, F
reinor seepage in pier E5 was diverted from the founding soils. Duration
[
of grout rtixing was tirted to ensure thorough rtixing of the grout constituents as specified by the design. Grout placettents was continuous, concluding the satisfactory installation of the'icudicats for piers E5 and E17.
he results of the sous stabilization grouting perfonced in piers CT 3/10 drVp pits indicate that this installation was effective. Be rtedium to fine grained sand observed on the excavated walls for these drop pits was l
certented throughout, enabling the craftsiten to rnaintain a vertical excavation face, thus facilitating lagging installation.
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r J.O. No.14358 (~)
3 P
Midland Plant '
d Units 1 & 2 Independent Assessment of Underpinning The finger drift to pier Kc5 was observed by the Assessment Team. he Contractor maintained a close tolerance on the horizontal limits of the excavation.
Lagging installation and backpacking associated with this drift conformed with the applicable procedures.
Installation of the upper lateral support system for the soldier pile wall along the east side of the SWPS was completed, allowing excavation of the access shaft to proceed. he Assessment Team observed excavation and lagging installations associated with lowering of the access shaft. The Contractor was careful to maintain the excavation well within the design limits, minimizing the amount of backpacking needed to ensure bearing between the lagging and in-situ soil. Placement of steel lagging was precise. Le craftsmen carefully aligned the lagging during installation, ensuring lagging spacing requirements were met. The Contractor began using welded studs this week to expedite lagging installation. Clip angles which fasten the steel lagging to the soldier piles are attached to the lagging with the threaded studs instead of fillet welds. The clip angles are then secured to the soldier piles. The lagging surfaces receiving the welded studs were dry and clean.
During installation of studs, the welding gun was held in place ~until the weld metal at the base of the stud had solidified. Welded stud bolts were than torqued to the appropriate tension, securing the clip angles into place.
Along the north side of the SWPS, installation of the soldier pile wall upper lateral support system continued. h e Assessment Team observed full penetration welding of the horizontal shims for the upper level waler. he wale, soldier piles and shim plates were brushed to bare metal in preparation for the welds.
The resulting quality of the full penetration welds, considering the size and extent of the effort involved with this type of weld, is indicative of a high level of craftsmanship.
Based on the observed quality of the on-going work, the Assessment Team con-cludes that construction of the SWPS access shaft is satisfactory.
Placement of concrete for the. north section of the Unit 1 BWST ring beam addition was observed by the Assessment Team. During placement, the Contractor effectively used a concrete boom truck to deposit concrete at preplanned locations, thereby minimizing the need for lateral movement of the concrete.
Concrete lift thicknesses and vibration of lifts was in accordance with the procedures. Proper curing of the surfaces completed the satisfactory placement of concrete for the north segment of the BWST Unit 1 ring beam addition.
Assessment Team Observation QA/QC h e Assessment Team closed NIR 22. This NIR concerned document control deficiencies identified at the Resident Engineers controlled document station for the rertedial soils work. he document deficiencies noted in NIR 22 have been corrected by Resident Engineering. MPQAD and the Assessment Team independ-ently verified correction of the deficiencies. Additionally, a sample audit by
J.O. No. 14358 4
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Unita 1 & 2 U
Independent Assessment of Underpinning MPQAD indicated that Resident Engineering is adaquately reaintaining their docurrents. As part of the long term corrective action, a system will be implenented whereby the Resident Engineers controlled documents will be-come reference docuroents. The Assessrtent Team will overview this change over from controlled docurtents to a reference system. A computerized register of design docurrents including change docurtents will serve as the rteans of control for the reference docurrents. The user will consult the listing and review the pertinent inforrtation in the refecence files for a particular docurtent as necessary to perforrt a given task. The Assessrtent Team believes that ireplettentation of this systert will provide the required assurance that the Resident Engineers are using the latest design docurrent revisions.
The activities of US Testing for concrete placertent at the BWST Unit 1 ring beam addition were observed during preplacertent and in-process testing. All required concrete testing was perfortted in accordance with ASIM procedures.
The Assessrtent Team attended MPQAD training classes on the SWPS plate load test and on excavation of Q soils areas. Both of these classes were judged to be acceptable in content and presentation.
Work Activity Packages No work activity packages were overviewed or active during the past week.
Nonconformance Identification Reports The following Nonconforrtance Reports (NIRs) rertain open or have been closed during the week.
NIR No.
Description Status (0pened) (Closed) 22 Resident Engineering Docurtent Control 2/21/84 4/30/84 25 Cortpressive Strength 3/30/84 Testing of Concrete Cylinders Open Iterts Iterts discussed during rteetings are categorized as follows:
OPEN ITEM - An itert for which action is required. The itert will retrain open until the required action has been taken. Tracking is required.
CLOSED ITEM - An item usually brought forward by the Assessrtent Teart that is discussed and adequately responded to. No tracking is required.
INFORMATION ITEM - An item brought forward to provide general background inforttation regarding work, such as work status or an upcorting design change.
No tracking is required.
9
J.O. No. 14358 5
-Midland Plant O O
'Unita 1 & 2
~
Independent Assessment of Underpinning.
OPINION ITEM - An opinion or suggestion given by the Assessment Team ex-pressing an alternate construction or quality assurance technique. The i-opinion or suggestion is given as a possible alternate that may facilitate an operation.
CLOSES ITEM - XX-XX - This notation identifies an action that' closes a
.previously identified open item. Tracking of the open items stops.
The following listing of all Open items from the Daily meeting notes with i
Bechtel and the text of the Weekly Reports. Carry-Over items from past weeks which have been Closed this week are also listed.
t Item No.
Description Closure 64-10 Trend Analysis Open 71-17 Computerized Civil Open Drawing Register 74-21 US Testing Corrective open Action 4
79-26 Upper Leveling Plates Open i
79-28 SWPS Backpacking Open Material 79-34 SWPS Backpacking
.Open Placement 81-21 BOP Construction Open Verification of Soils Work 82-3 Surface Voids in Grout 85-12 f
82-9 Trend Analysis Update Open i.
f 84-12 Diesel Fuel Oil Lines 85-6 84-13
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SWPS Phase II Cofferdam 85-7 l
84-20 Design Drawing Requirements Open for BWST Ring Beam Addition 84-21 Repair of BWST Ring Beam 85-18 i
Cracks
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,. _.,.. _ _ _.,.. ~ -. -. _ _,,... _ -., - _ ~ _. _ _. -..
J.O. NO. 14358 6
Midland Plant Units 1 & 2 Independent Assessment of Underpinning 84-22 BWST Concrete Reinforcing 85-19 Steci 84-23 BWST Corrosion Protection 85-20 and Waterproofing 84-24 Repair of Concrete 85-13 Surface Iftperfections of the BWSTs 85-5 SWPS North Wall Concrete Open Surface 85-29 Auxiliary Building Access Open Shaft Grout Shims
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NotescfDailyMek I
Independent Assessment of Und:rpinning Midland Plant, Units 1 & 2 Consumers Power Car.pany Held at Midland Site r1 b, Present For:
Consumers Power Stone & Webster Parsons-Brinckerhoff MPAQD G. W rray TI Benvie J. Oliviera J. McMaster R. Wheeler D. Zito R. Sevo R. Wieland P. % jeski Bechtel J. Fisher J. Kelleher E. Cviki PURPOSE Thi6 meeting 16 held each day to discuss items regarding the Independent Soils AcDessment at the Midland Plant, Units 1 & 2.
DISCOSSION Status Items Item 85-1 Auxiliary Building Underpinning Activities
'71stallation of the steel collar support frames was completed for piers CT 2/11 allowing drifting to piers CT.3/10 to corr 1r.ence.
Ent.vation of the drop pits at the reactor containment for installation of the, E/W gril.lage support columns is in progress.
Excavation of niet a E/WS progressed to tM top of the bell and installation c/ ihe ring beams was cttr.pleted.
Excavation of the E17 pier has begun using the enlarged pier configuration.
Installation of reshore members to allow 1".nger drifting to piers KC 5/9 is in progress.
(INFORMATION ITEM)
/
s' Item 85-2, - SWPS Underpinning Activities J. Fisher reported that excavation below the first level wales has begun along the east side of the SWP3.
(INFORMATION ITEM)
Item 85-3 Surface Voids in Grout J. Kelleher provided the Asocosment Team with copies of FCRs addressing repair of mino" surface voids in.the grout for icveling plates, anchor bolto and grouted in bolts.. (Item 02-3 remains OPEN) (INFORMATION ITEM)
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Notes cf Daily Meeting Independent Assesret cf Underpinning r~'
Midland Plant, Uni W 1 & 2
(_-
Consumers Power Company Held at Midland Site Midland Michigan April 30, 1984
,New Items Item 85-4 One Time Deviation FCRs P. Majeski asked how a document user determines if the work described in a one time deviation FCR, which has been incorporated onto a document by reference, is complete.
J. Fisher responded that FCRs incorporated by reference contain a brief description of the FCR requi.ements. If the FCR is applicable to the document user's work, a copy of the FCR is available for the user to determine if the work has been completed.
(CLOSED ITEM)
Item 85-5 SWPS North Wall Concrete Surface D. Zito discussed the existing concrete surface on the SWPS north wall.
It was noted that a section of the wall approximately 3 ft long and 1.5 ft high located 26 ft from the SWPS northeast corner exhibited honeycombing. Also, several form tic holes were observed which have not been repaired. The Assessment Team asked what will be done to repair these conditions.
J. Fisher will respond. (OPEN ITEM)
Response Items Item 85-6 Diesel Fuel Oil Liner J. Fisher responded to the Assessitent Team question concerning the plans for work on the diesel fuel oil lines.
It is planned to excavate and expose the diesel fuel oil lines for inspection. All portions of the lines which are considered acceptable will be left in place.
Ihe remaining portions will be removed and replaced with now lines. (CLOSES ITEM 84-12)
Item 85-7 SWPS Phase II Cofferdam J. Fisher discussed design changes which will be htplemented for the SWPS Phase II cofferdam.
These changes are as follows:
A.
Wood lagging will be used for the soldier pile wall in those areas where the lagging span is 8 ft or less.
B.
Soldier piles will be installed full depth in shected pits. Previously, the design called for the use of drilling for installation of that portion of soldier pile excavations below the existing utilitics.
C.
Based on availablo subsurface information, excavation for the Phase IIA portion of the coffordam will not go below El. 610 ft. This will climinate the lower bracing at El. 612.5 ft.
Not a of Daily Me r,
Ind: pendent Asses t of Und:rpinning V
Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site
~
Midland, Michigan April 30, 1984 D.
The top 8 ft'of excavation for the Phase IIB portion of the cofferdam will be sloped IH:IV.
This will eliminate the lower bracing at El. 612.5' in portions of the Phase IIB cofferdam.
(CLOSES ITEM 84-13)
Item 85 8 NIR 22 - Resident E.ngineering Document Control The Assessment Team has completed an overview of corrective action taken to address deficiencies with the Resident Engineers controlled documents noted in the NIR 22. Document deficiencies have been corrected by Resident Engineering. Additionally, a sample audit by MPQAD indicates that Resident Engineering is maintaining their documents adaquetely. Based on the sample audit results and a review by the Assessment Team that the noted document deficiencies were corrected, NIR 22 is closed.
(INFORMATION ITEM) e e
T
Not:s of Ibily Me ng m
Ind: pend:nt As:es
.t of Und:rpinning
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Midland Pl':mt, Unita 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan by 1, 1984 Present For:
Consumers Power Stone & Webster Parsons-Brinckerhoff MPQAD G. Murray D. Benvie J. Oliviera J. Mc hster D. Zito R. Sevo P. mjeski Bechtel J. Fisher J. Kelleher E. Cviki PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 85 Auxiliary Building Underpinning Activities Excavation and soils stabilization grouting is in progress for the CT 3/10 drop pits.
Excavation for the E/W5 piers has proceeded into the pier bell area.
Item 85 Trend Analysis J. McMaster stated that MPQAD will give a presentation on 5-4-84 detailing their plans for modifying the NCR trend analysis program that is currently j
being used (Item 64-10 remains OPEN)
(INFORMATION ITEM)
Item 85 SWPS Backpacking Material J. Fisher discussed the backpacking material for the SWPS soldier pile wall.
The contractor plans to mix cement with the present backpacking to aid in maintaining the backpacking in-clace once it is installed.
(Item 79-28 re-mains OPEN)
(INFORMATION ITEM)
New Items No new items were discussed.
O I
Notea cf Dailyg; ting Independent AsWsment of Und:rpinning (m)
Midland plant, Unita 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 1, 1984 Response Items Item 85-12 Surface Voids in Grout 7he Assessment Team has reviewed FCRs issued to address repair of minor surface voids in grout for leveling plates, anchor bolts and grouted anchors.
Based on a review of these FCRs, the Assessment Teams believes that require-ments for repair of minor grout surface imperfections are adequately addressed.
This item is closed.
(CLOSES ITEM 82-3)
Item 85 Repair of Concrete Surface Imperfections of the PWSTs J.. Fisher responded to the Assessment Team question concerning timely repair of surface imperfections 'for the BWST -ring beam addition. Repsir of. surface imperfections for the BWST ring beam additions had been delayed due to the stop work order and because of scheduling changes. It is planned, as the work activity allows, to repair these surface imperfections before the affected area is covered up.
(CLOSES ITEM 84-24) 1 i
Notea cf Daily Meet Independent Asses of Und:rpinning
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Midland Plant, Unita 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 2, 1984 Present For:
Consumers Power Bechtel MPQAD Stone & Webster G. Murray J. Fisher J. McMaster D. Benvie J. Schaub J. Kelleher R. Sevo D. Zito E. Cviki L. Rouen B. Brandes Parsons Brinckerhoff B. Metros PURPOSE This mee' ting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 85-14 Auxiliary Building Underpinning Activities Excavation of the E5 pier to founding grade and placement of the concrete mudmat was completed.
Excavation of the E17 pier middle shaft was completed.
Installation of rein-forcing steel is expected to begin today.
Excavation of the drop pit for installation of the E5 grillage support columns at the reactor containment was completed.
Excavation of the finger drift to pier Kc5 has begun. (INFORMATION ITEM)
Item 85-15 SWPS Underpinning Activities J. Fisher stated that the FCR allowing the use of wood lagging in areas where the lagging span is less than 8ft will be issued today. Tubular steel lagging will still be used where the lagging span exceeds 8 ft.
(INFORMATION ITEM)
New Items Item 85-16 BWST Concrete Placement J. Fisher reported that concrete placement is scheduled today for the BWST Unit 1 ring beam addition.
(INFORMATION ITEM)
Notes of Daily Me Ind: pend:nt Asres t of Und rpinning (m.)
e Miditnd Plrnt, Unita 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 2, 1984 Item 85-17 Upper leveling Plates J. Kelleher provided the Assessment Team with a copy of the Field Engineers' report suntarizing the results of the welding demonstration conducted on 4/20/84.
B is demonstration was performed to evaluate the extent of warping that would result with the use of a smaller weld for the upper leveling and bearing plate assembly.
(INFORMATION ITEM)
(Item 84-3 remains OPEN)
Item 85 Repair of BWST Ring Beam Cracks E. Cviki responded to the Assessment Team question as to whether the cracks on the underside of the valve pit top slabs at the BWSTs are to be repaired.
He stated that the cracks have been evaluated and it has been determined that these cracks do not require repair.
(CLOSES ITD4 84-21)
Item 85 BWST Concrete Reinforcing steel J. Fisher responded to the Assessment Team question concerning exposure of the Unit No. 1 BWST reinforcing steel to water and dirt. The low area on the west side of the Unit 1 BWST where this condition had been occurring has been creaned up.
Additionally, pumps have been reactivated in this low area to remove water that had collected. It was also noted that the discharge of water pumped thru the valve pit into this low area has been stopped.
D. Zito stated that he has been observing the contractors efforts to clean up and dewater the noted area and is satisfied with the results of the cleanup.
(CLOSES ITEM 84-22)
Item 85 BWST Corrosion Protection and Waterproofing E. Cvikl responded to the Assessment Team question concerning corrosion protection and waterproofing requirements for the BWSTs. He stated that there was not a concern with the channel sections contributing to corrosion of the reinforcing steel.
The channel sections which support the reinforcing cage do not come in contact with the insitu soil because they rest on a concrete mudmat. The presence of the mudmat prevents the insitu soil from corroding the channel sections and the reinforcing cage.
In response to Assessment Team concerns associated with the damaged waterstop, E. Cvikl stated that a sealant will be applied to con-crete once it is placed in the vicinity of the waterstop. This sealant will effectively serve the. purpose that the waterstop was designed for. Based on this response the Assessment Team concludes that corrosion protection and waterproofing of the BWSTs is satisfactory.
(CLOSES ITEM 84-23)
Notes of Daily Me
(~')
Ind: pendent Asns
.t of Und rpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 3, 1984 Present For:
Consumers Power Bechtel MPQAD Stone & Webster G. tizrray J. Fisher J. McMaster D. Zito J. Kelleher R. Sevo E. Cviki Parsons-Brinckerhoff B. Metros PURPOSE
'Ihis eeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 85-21 Auxiliary Building Underpinning Activities Excavation of the W5 pier shaft and placement of the concrete mudmat was completed. Excavation of the E/W5 pier bells contenced.
Drop pit excavation at the reactor containment for the W5 grillage support columns was completed.
Excavation of the finger drift to pier Kc8 has started.
Lnstallation of reinforcing steel is in progress for the E17 pier.
Pier CT 1 was rejacked for load verification.
(INFORMATION ITEM)
Item 85 SWPS Underpinning Activities J. Fisher reported that revisions to the method of shimr.ing the interface between the wales and the soldier piles is presently being reviewed. A revised design consisting of full penetration weld connections to a leveling plate span-ning the interface between the wales and piles is being considered. (INFORMATION ITEM)
Item 85-23 BWST Concrete The first concrete placement for the Unit 1 BWST ring beam addition was completed.
(INFORMATION ITEM)
Notes of Ihily Meeting Ind: pendent Ass;ss g of Und:rpinning
,r3 Mid1rnd Plant, Uni F 1 & 2 V
Consumers Pow::r Company Held at Midland Site Midland, Michigan m y 3, 1984 Item 85-24 Upper leveling Plates B. Metros reported that he had reviewed the Bechtel Field Engineers' report on the welding demonstration on plate warpage. Mr. Metros stated that end restraining the plates during cooldown and the use of a smaller continuous weld may not effectively reduce warpage. The use of several shorter welds may be effective in controlling warpage.
(Item 79-26 remains OPEN) (OPINION ITEM) l New Items Item 85-25 Weekly Report #84 The text of Weekly Report #84 was reviewed.
It was determined that all open items had been previously identified.
It was clarified in the meeting that the portion of the report text describing over excavation at pier W17 which re-quired grouting was a result of material sloughing and not worlatanship.
(INFORMATION ITEM)
Response Items No response items were addressed.
9
Notes of Daily Meet Ind:pendrnt Asse:
of Underpinning
(, ,
Midlrnd Plant, Uni 1&2 v
Consumers Power Company Held at Midland Site Midland, Michigan May 4, 1984 Present For:
Consumers Power Bechtel MPQAD Stone & Webster None J. Fisher J. McMaster W. Kilker J. Kelleher R. Sevo L. Rouen E. Cviki D. Benvie M. Blendy Parsons Brinckerhoff B. Metros PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at che Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 85 Auxiliary Building Underpinning Activities Pier CT 12 was rejacked for load verification.
Installation of bell bracing is in progress for pier W5.
The concrete mudmat at founding grade for the E17 middle pier was placed.
(INFORMATION ITEM)
Item 85-27 Trend Analysis J. McMaster discussed MPQAD's plans regarding NCR trending. The present manual system for trend analysis of NCRs will remain in effect. To complement the present trending, an in-house tracking system which MPQAD has used on an in-formal basis for the past few months will be instituted as a monthly activity to identify development of NCR trends associated with all remedial soils activities. This tracking activity will evaluate the number of NCRs per number of inspection reports vs time for a specific construction activity (i.e., ex-cavation, grouting, expansion anchors, welding associated with fabrication, welding associated with erection, etc.). The first monthly report presenting the results of the NCR tracking activity will be issued in mid-May. The Assess-ment Team will review-the report when it is issued.
(Item 64-10 remains OPEN)
(INFORMATION ITEM)
Item 85 SWPS Backpacking Method B. Metros discussed backpacking in process on the east side of the SWPS. He stated that additional effort is needed in tamping the backpacking to enhance it's effectiviness.
(Item 79-34 remains OPEN)
(OPINION ITEM) s
Notes of Daily Meet Ind:p;ndent Ass;s.
of Und:rpinning
)
m Midland Plant, Units 1 & 2 Consumers Power Carpany Held at Midland Site Midland, Michigan May 4, 1984 New Items Item 85 Auxiliary Building Access Shaft Grout Shims D. Benvie discussed the use of grout shims at the interface of the wales and a few of the piers in the auxiliary building access shafts.
It was noted that concern had previously been raised over the use of grout shims for the lateral support system at the SWPS. He asked if there was a concern with the use of similar grout shims for the access shaft lateral support system.
J. Fisher will respond.
(OPEN ITEM)
Item 85-30 Pier W17 Alternate Design J. Fisher reported that the alternate pier design used for pier E17 will be implemented for pier W17. Soil conditions dictated that the alternate design which consists of an enlarged straight shafted pier be used in place of a belled pier.
(INFORMATION ITEM)
Response Items No response items were addressed.
O
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_ STONE & WEBSTER MICHIGAN, INC.
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P.O. Box 2325. BOSTON. M ASSACHUSETTS O2107 United States Nuclear Regulatory Constission May 17, 1984 Midland Site Resident Office Route 7, J.O. No. 14'458 Midland, Michigan Ref. MPF 86, PP I C I PA '. E~W _ _..
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Attention: Mr.
R.
Cook 3/kA g._j _
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I DOC,KET_No. 50-339/330 ic j.
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- a i LDLA_NDPLANTUNITS1&2 INDEPENDENT ASSESSMENT OF UNDERPINNING 4A I'-
y REPORT NO. 86
- Fi 4 14)
A copy of the Independent Assessment of Underpinning Weekly Report No. 86 for the period of May 6, 1984 through May 12, 1984 is enclosed with this letter. Included as attachments are the minutes of the daily meetings held during the week between members of the Assessment Team and Site Engineering, Construction, and Quality Assurance personnel.
If you have any questions with respect to this report please contact me at (617) 589-2067.
.Qfy~d.
d.C.fc/n A.
Stanley Lucks Project Manager Enclosures ASL/pd cc:
JJHarrison (enc), US NRC Glen Ellyn, IL Grace Dow Memorial Library (enc) 4 DQuattrte (enc) CPCo Midland (site)
JMooney (ene) CPCo Jackson JMeisenheitter (ene) CPCo Midland (site)
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s J.O. No. 14358 Midland Plant Units 1 & 2 Independent Assessment of Underpinning Weekly Report No. 86 May 6. 1984 through May 12. 1984 Personnel on Site Stone & Webster Michigan. Inc.
P.
Majeski 5/8 - 5/12 D.
Benvie 5/7 - 5/12 D.
Zito 5/7 - 5/11 W.
Kilker 5/6 - 5/10 L.
Rouen 5/6 - 5/8 A.
Lucks 5/9 - 5/10 D.
O' Nan 5/9 - 5/10 G.
Palmer 5/9 - 5/10 Parsons Brinckerhoff Michigan. Inc.
J.
Oliveira 5/9 - 5/12 B.
Metros 5/6 - 5/8 J.
Ratner 5/10 - 5/11 Meetings Attended Date Represented Purpose 5/7 - 5/9 Stone & Webster Daily Assessment 5/11 Bechtel Team Meeting Consum.ers Power Parsons 5/7 Consumers Power Project Soils Bechtel Meeting MPQAD Stone & Webster 5/7 Bechtel Constructability Consumers Power Review Meeti.y MPQAD Stone & Webster 5/8 NRC CCP/ Soils Interface-Consumers Power Meeting MPQAD Stone & Webster 5/10 NRC Monthly NRC Meeting Consumers Power Stone & Webster
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J.O. No. 14358 NEdland Plant Units 1 & 2 Independent Assessment of Underpinning Date Represented Purpose 5/11 Consumers Power Weekly Bechtel Interorganizational MPQAD Meeting Stone & Webster 5/11 Consumers Power Document Control Bechtel Information Meeting MPQAD Stone & Webster Underpinning and Remedial Soils - Construction Pier E5: Concrete placement fcr the pier bell and the shear key between the' pier and the containment drop pit was completed. Installation of the pier shaft reinforcing steel and the grillage support columns in the containment drop pit is in progress.
Pier Kc8:
Excavation of the finger drift to the pier continued.
Pier E17: Placement of concrete for the middle portion of the enlarged shaft was completed.
Piers CT3/10: Pier excavations are in progress.
Pier.W5: Concrete placement for the pier bell and the shear key between the pier and the containment crop pit was completed. Installation of the pier shaft reinforcing steel is nearing completion. Grillage support column installation in the containment drop pit continued.
Pier W17: No further activity was perforr.ed pending fabrication of lagging materials to support an enlarged straight shafted pier.
Pier Kc5: Excavation of the pier is in progress.
Access Shaft Level C Wales:
Installation of the Level C Wales was completed.
SWPS: Installation of the upper level wales continued on the north and west sides. Excavation and lagging installation was completed to El. 623 ' along the east side of the excavation.
BWSTs: Reinforcing steel. formwork installation, and concrete placement continued.
l Cathodic Protection: Trench excavation work continued.
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3 J.O. No. 14358 Fudland Plant Units 1 & 2 Independent Assessment of Underpinning Assessment Team Observations - Co..struction Water seepage was effectively controlled in the E5 pier bell prior to placement of concrete for the working mat.
The Contractor installed a perimeter trench around the bell periphery to intercept seepage along the side of the bell.
Intermittent lateral trenches were excavated to divert any possible seepage away from the founding area of the bell. Subgrade soil which had been softened prior to excavation of the drainage trenches was removed in accordance with the procedures.
The effectiveness of seepage control for the foundation of the E5 pier bell was judged to be satisfactory.
Concrete placement was observed at the E17 pier and the E/W5 bells. Key items noted included placement technique, consolidation and curing of concrete. Place-ment methodology and consolidation were judged to be satisfactory. The concrete was wet cured in accordance with the procedures.
The Assessment Team attended a constructability review for the FIVP load transfer.
The purpose of the review was to discuss design requirements and finalize the logic and construction sequence associated with the FIVP load transfer. Items reviewed included intent and clarity of drawings, sequence of loading, procedure preparation requirements, proper sequencing of construction operations, interfacing between engineering, construction and quality organizations and allowances for contingencies. The Assessment Team believes that the constructability review was very thorough. The various organizations involved with the review were knowledge-able of the design and engineering requirements for the FIVP load transfer.
Pertinent engineering and construct' ion input was provided by all the organizations involved in the review. Additionally, the review was scheduled in a timely manner ensuring enough lead time for incorporation of applicable comments into the design drawings, and preparation of the required procedures and inspection plans prior to the scheduled construction dates.
The Assessment Team observed cadwelding of rebar and repair of 1.0 in. exploration holes at the BWST Unit 1 valve pit. The cadweld, packing and clamps were properly installed. The assembly was then preheated in accordance with the procedures.
The crucible was installed and the filler metal was fired. The hardware was removed after initial solidification and the slag removed from the completed cadweld.
The resulting quality of the completed cadweld was indicative of the satisfactory workmanship observed during the cadwelding process. Drypack was used to repair the 1.0 in. exploratory holes. The holes were presoaked in accordance with procedures.
Drypack was mixed in small quantities appropriate for the size of this operation, ensuring that freshly mixed material was used at all placement locations. The dry-pack was rammed into the holes with a tamping rod and hamer, resulting in a well compacted and sound repair.
The Assessment Team inspected the condition of the backpacking completed to date for the SWPS east access shaft. In several locations the backpacking had fallen out from behind the lagging. This condition is attributable to the type of back-packing material and level of ef fort being implemented to install the backpacking.
The situation is aggravated by vibration caused during flyash concrete removal around the soldier piles. The Assessment Team has previously expressed concern with this backpacking material and method of installation. The Assessment Team does not believe that the problems experienced to date have affected the overall stability of the excavation.
However, the continuing problems associated with maintaining the backpacking in place indicates more diligence is required by the b
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J.O. No. 14358 Midland Plant Units 1 & 2 Independent Assessment of Underpinning Contractor to correct this situation before the excavation is significantly extended below the present levels. The Assessment' Team has had further discussions with the Contractor concerning this situation. One modification being implemented involves the use of clay at the bottom of every second or third lagging board to prevent the sand backpacking from falling out. The Contractor is implementing the use of clay to upgrade the backpacking placed to date. It is planned to continue this backpacking method at least until excavation of the access shaft proceeds below the sand fill and into the clay fill. Once the excavation is in clay, it is anticipated the excavation can be maintained closer to design lines, thereby ensuring more contact between the lagging and in-situ soil. As an additional preventive measure,where necessary, the Contractor also plans to place excelsior in the spaces between the lagging.
- The Assessment Team will continue to monitor backpacking at the SWPS to ensure the stability of the in-situ soil support is maintained.
Assessment Team Observations QA/QC The Assessment Team attended a quality awareness session held during a Subcon' ract-t or's toolbox meeting. At this meeting, the requirements for belling and excavation of piers were discussed. During the discussion, the importance of predetermined hold points and quality criterion was reviewed.
This session was judged to be adequate in providing the craftsmen with an awareness of quality requirements associated with the belling and excavation of piers.
MPQAD calibration of vibrators and US Testing inspection and testing of concrete placed for the E17 pier was overviewed by the Assessment Team. Vibrators were inserted into fresh concrete and the required mintrum frequency of vibration was verified. Preparation of concrete cylinders and air, slump and temperature testing conformed with ASTM procedures.
The Assessment Team attended a training session conducted by the SWPS underpinning subcontractor to familiarize their field engineers with quality requirements for jacking equipment.
The discussion reviewed quality proc.urement requirements, manufacturers' equipment documentation, and calibration data needed prior to
' installation of the jacks. The content of the training session was judged to be thorough, detailing all the necessary documentation requirements to be met
- prior to jack installation.
Work Activity Packages No work activity packages were overviewed or active during the past week.
- Nonconformance Identification Reports NIR No.
Description Status (0pened)(Closed) y 25 Compressive Strength -
3/30/84 5/9/84 Testing of Concrete Cylinders J
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5 J.O. No 14358 Midland Plant Units 1 & 2 Independent Assessment of Underpinning Open Items OPEN ITEM - An item for which an action is required. The i'~em will remain open until the required action has been taken. Tracking is required.
-CLOSED ITEM - An item usually brought forward by the Assessment Team that is discussed and adequately responded to.
No tracking is required.
-INFORMATION ITEM _ - An itet brought forward to provide general background infontation regarding work, such as work status or an upcoming design change.
No tracking is required.
OPINION ITEM - An opinion or suggestion given by the Assessment Team expressing an alternate construction or quality assurance technique. The ocinion or suggestion is given as a possible alternate that may facilitate an operation.
CLOSES ITEM -XX-XX - This notation identifies an action that closes a previously identified open item. Tracking of the open item. stops.
'Ihe following listing of all Open items from the Daily Meeting Notes with Sechtel and the text of the Weekly Reports. Carry-over items from past weeks which have been Closed this week are also listed.
Item No.
Description Closure 64-10 Trend Analysis Open 71-17 Computerized Civil Open Drawing Register 74-21 US Testing Corrective Open Action 79-26 Upper Leveling Plates Open 79-28 SWPS Backpacking Open Material 79-34 SWPS Baokpaeking Open Placement 81-24 BOP Construction Open Verification of Soils Work 82-9 Trend Analysis Open 86-6 84-EO Design Drawing Requirements for BWST Ring Beam Addition
6 J.0, No. 14358 Midland Plant Units 1 & 2 Independent Assessrtent of Underpinning Itert No.
Descripticn Closure 85-5.
SWPS North Wall Concrete 86-18 85-29 Auxiliary Building Access Open Shaft Grout Shirts 86-4 Auxiliary Building Open 4
Crack: rapping 86-16 Vibration of BWST open Concrete UL*
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Note 2 cf Daily Meeting Independent Assessment of daderpinning Midland Plant, Units 1 & 2 Consurters Power Cortpany.
Held at Midland Site Midland, Michigan May 7, 1984'
'Present For:
Consumers Power Bechtel MPQAD Stone & Webster G. Murray J. Fisher J. McMaster L. Rouen J. Kelleher R. Sevo W. Kilker E. Cvikl D. Benvie Parsons Brinckerhoff B. Metros PURPOSE
~
This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units l'& 2.
. DISCUSSION Status Items Item 86-1 Auxiliary Building Underpinning Activities Excavation of the pier CT 3/10 drop pits continued.
Bell excavation and bracing installation is in progress for piers E/W5.
Excavation of the finger drifts r.as begun for piers Kc 5/8.
Installation of the Level C Wales is nearing completion for both access shafts.
(INFORMATION ITEM)
Item 86 SWPS Backpacking Material J. Fisher reported that the use of cement with sand for backpacking the soldier pile wall will be discontinued. Use of the sand and cement mix produced a backpacking which was too stiff and prevented the contractors ability to sub-sequently check for voids in areas other than the spaces between lagging. Clay will be used instead of cement with the sand as a means to maintain the back-packing in place.
(Item 79-28 remains OPEN) (INFORMATION ITEM)
Item 86-3 BOP construction Verification of Soils Work J. Fisher reported that a meeting with the Assessment Team is scheduled today to discuss interfacing between FSO and the Balance of Plant (BOP) with respect to instances when BOP verification of underpinning activities will be required.
(Item 81-21 remains OPEN) (INFORMATION ITEM)
Notes cf Daily Meetiw Independent Asse sment of Und:rpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 7, 1984 New Items Item 86-4 Auxiliary Building Crackmapping W. Kilker requested a copy of the MPQAD review of the required auxiliary buildine crackmapping associated with jacking of piers CT 1/12.
J. McMaster will rescond.
(OPEN ITEM)
Item 86-5 FIVP Crackmapping E. Cviki reported that FIVP crackmapping performed in April using the new grid system did not result in issuance of any NCRs. Previously, cracks in the FIVP were referenced to building column lines, resulting in differing interpretations as to the correct location of the cracks.
(INFORMATION ITEM)
Response Items Item 86-6 Design Drawing Requirements for BWST Ring Beam Cracks E. Cvikl provided the Assessment Team with a copy of the FCR addressing elevation inconsistencies in the top elevation of the valve pit, existing ring beam and ring beam addition at. the BWSTs. 'Ihe FCR specifies that the~ top of the ring beam addition will be sloped as required to match the existing tcp elevation of the valve pit, while maintaining a minimun 2 in. of concrete cover over the reinforcing steel. The Assessment Team concludes that possible interface problems between the valve-pit and ring beam addition due to elevation inconsistencies have been adequately addressed.
(CLOSES ITEM 84-20)
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Notes of Daily Meeting Independent Assessment of Underpinning
' Midland Plant, Units 1 & 2 Consumers Power Company-Held at Midland Site-Midland, Michigan May 8, 1984 Present For:
Consumers Power Bechtel MPQAD Stone-& Webster G. H2rray J. Fisher J. McMaster L. Rouen J. Kelleher R. Sevo W. Kilker E. Cvikl D. Benvie Parsons Brinckerhoff B. Metros PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 86-7 Auxiliary Building Underpinning Activities Excavation of the CT 10 pier shaft has begun.
Rebar installation is in progress for pier E17..
Bell excavation and placement of the grout mudmat was completed for. pier W5.
(INFORMATION ITEM)
Item 86-8 Auxiliary Building Crackmapping 4
E. Cviki reported the subrtittal of the auxiliary building crackmapping results perfonted after jacklag of the CT 1/12 piers is scheduled for 5/11/84.
J. McMaster stated the MPQAD should complete their review of the crackmapping results approximately 2 weeks after submittal.
(Item 86-4 remains OPEN) (INFORMATION ITEM)
New Iterts Item 86-9 BWST Ring Beam Addition J. Fisher reported that concrete will be placed today for the west segment of the Unit 2 ring beam addition.
(INFORMATION ITEM)
Item 86 Rejacki s of the W8 Grillage E. Cviki reported'that, the W8 grillage will be re.iacked toda The W8. grillage isbeingrejackedinresponsetoachangeof20%inthegrilfa.ge posts strain gage readings and an increase in the rate of building settlement L_
Notes of Daily Meating Ind; pendent As;a. cnt of Underpinning Midland Plant, Unito 1 & 2 Consumers Power Company Held at Midland Site
~ Midland, Michigan May 8, 1984 (7 mils /48 hrs) in the vicinity of the W8 grillage.
(INFORMATION ITEM)
. Item 86 Welderete W. Kilker asked if the contractor plannec to resurte the use of Welderete
-sl.nce the NCR addressing concerns with the vendors QA program had been resolved.
J. Kelleher responded that it is planned to use Welderete for applications related to temporary underpinning activities. Engineering is presently evaluating the use of Welderete for the pemanent under-pinning.
(CLOSED ITEM)
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Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Fuchigan May 9, 1984
_Present For:
' Consumers Power Bechtel MPQAD Stone & Webster G. Murray P. Goguen J. McMaster W. Kilker J. Schaub J. Fisher R. Sevo D. Benvie J. Kelleher D. Zito E. Cviki P. Majeski B. Brandes N. Swanberg Parsons Brinckerhoff J. Oliveira PURPOSE This meeting is held each day to discuss items regarding the Indecendent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 86-12.'-
Auxiliary Building Underpinning Activities Shaft excavation for pier CT 10 has proceeded to the concrete mudmat at el. 58S No perched groundwater has been encountered to date.
Excavation of the CT 3 pier shaft has started.
Bell excavation was completed for the E5 pier.
Concrete placement for the shear key between the containment drop cit and the W5 pier was completed.
Excavation of the Kc5 pier shaft has begun.
(INFORMATION ITEM)
Item 86-13 U.S. Testing Corrective Action J. Kelleher provided a status on the U.S. Testing upgrading process. All Quality Control Procedures (QCPs) with attached work instructions have been submitted and approved. Issuance of the QCPs is in progress. Qualification of U.S. Testing Technicians to Level I for 20 or more certifications is continuine.
Five technicians remain to be cross trained to at least 20 certifications.
(INFORMATION ITEM)
Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, NEchigan May 9, 1984 New Items Item 86-14 MPQAD Receipt Inspection of the E/W5 Grillages P. Majeski asked if MPQAD receipt inspection of the E/W5 grillages was completed and if so were any NCRs issued.
J. Kelleher stated that MPQAD receipt inspection had been completed. Procedural nonconformances were noted during the inspection, resulting in issuance of an NCR. No hardware deficiencies were found during the receipt inspection.
(CLOSED ITEM)
Item 86-15 Lessons Learned J. Schaub asked if there were lessons learned from the Level C wale installations that can be applied to the remaining wale installations in the access charts.
J. Fisher responded that changes will be made to design documents to incorporate lessons learned from the Level C wale installation.
(CLOSED ITEM)
Item 86-16 Vibration of BWST Concrete D. Zito noted that an NCR had been issued due to insufficient vibration of the
- oncrete placed yesterday for the BWST Unit 2 ring beam addition. It was noted that heavy rebar congestion prevented the contractor from adequately vibrating the concrete. Mr. Zito asked what provisions will be taken to address this problem for the remaining BWST concrete placements where there is a high concentration of rebar.
P. Goguen stated that modifications being evaluated to address this problem in the future include :
A.
Bundling of rebar to allow passage of vibrators into these heavily congested areas.
B.
Using form vibrators to provide additional consolidation of the concrete.
C.
Placing starter grout in areas where rebar congestion is extensive to ensure full penetration of concrete.
The Assessment Team will overview upcoming concrete placements at the BWST.
Implementation of the proposed modifications will be evaluated for effectiveness.
(CPEN ITEM)
Response Items Item 86-17' - NIR 25 - Compressive Strength Testing of Concrete Cylinders
'Ihe Assessment Team has reviewed the QAR response to NIR 25 detailing deficiencies associated with the use of the maximum load indicator dial on
-the U.S. Testing concrete compression machine. The QAR states that the use of the needle is not required by ASTM procedures. Although the concrete compression machine at the U.S. Testing Laboratory is equipped with the needle, the tech-nicians do not use it because it affects the reading of the crimary load measurine
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Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2-Consurters Power Cottpany
~ Held at Midland Site Midland, Michigan May 9, 1984 arm. It should be noted that the concrete compression machine has been calibrated with and without the maximum load indicator dial. Additionally, shock associated with concrete failure during testing can effect the
-rtaximum load indicator reading. Therefore, the US Testing Technicians only read the load measuring arm. The Assessment Team contacted various QA organizations involved with the nuclear industry and found that although the maximum load indicator is used during testing, the primary load measuring arm value is used to document rtaximum load. The Assessment Team concludes therefore that the procedure being implemented is adequate. NIR 25 is CLOSED.
(INFORMATION ITEM)
Item 86 SWPS North Wall Concrete Surface.
J.
Fisher responded-to the Assessment Team question concerning repair of honeycombing and form tie holes for the SWPS north wall. All areas of the north wall where surface imperfections such as honeycombing or font tie holes exist will be repaired in accordance with design requirements. The repair work will be completed prior to placement of concrete for the missile shield protection on the SWPS north wall.
(CLOSES ITEM 85-5) b 9
Notes of Daily Meeting Independent Assessrtent of Underpinning Ji
-Midland Plant, Units 1 & 2 Consurters Power Cortpany
. Held at Midland Site Midland,' Michigan :
May 10, 1984 No treeting was held on this date.
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Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site s
Midland, Michigan N y 11, 1984 Present For:
Consumers Power Bechtel MPQAD Stone & Webster G. Wrray J. Fisher J. McMaster D. Benvie R. Wheeler J. Kelleher D. Zito E. Cviki P. Majeski Parsons Brinckerhoff J. Oliveira J. Ratner PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 86 19 - Auxiliary Building Underpinning Activities Concrete placement was completed for the W5 pier bell.
The first lift of concrete was placed for the middle portion of the E17 pier shaft.
Level C wale installation has been completed in the east access shaft.
(INFORMATION ITEM)
Item 86 20 SWPS Underpinning Activities l
J. Fisher reported that an FCR allowing the use of wood lagging in areas where the lagging span is less than 8 ft.was issued. Tubular steel lagging will still l
be used where the lagging span exceeds 8 ft.
(INFORMATION ITEM)
New Items Item 86-21 BWST Crack Review l
E. Cvikl reported that Resident Engineering has reinspected the existing BWST l
ring beams to determine if additional cracking had occurred in areas where concrete placement is scheduled in the near term, subsequent to repair of the i
original cracks. No additional cracks were found.
(INFORMATION ITEM)
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Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 11, 1984 Item 86-22 Independent Assessment 270 Day Report P. Majeski stated that the 270 Day Report sumarizing the Assessment Team observations of the underpinning work perronr.ed since the 90 Day Report had been recently issued. He noted that the Assessment Team will address follow-up of the conclusions and recomendations contained in the report in the near fbture.
(INFORMATION ITEM)
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Item 86 NCR Trending by FSO P. Majeski requested an update on NCR Trending being performed by FSO.
J. Fisher stated that FSO has recently revised their in-house trending method
.to include tracking of NCR trends for very specific work activities. FSO trending tracks the number of nonconformances for a given level of work effort.
The level of work effort is expressed as a quantity (e.g., number of expansion anchors, cubic yards of concrete, etc.) which has been selected to best repre-sent the work effort for a specific activity.
(INFORMATION ITEM)
Item 86 Weekly Report #85
'lhe text of Weekly Report #85 was reviewed. It was determined that all open items had been previously identified.
(INFORMATION ITEM)
Response Items No response items were addressed.
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~f Route 77-s Ref. MPF 87 Midland, Michigan
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Cook DOCKETNO.-50-339/330.
MIDLAND PLANT UNITS 1 & 2 w
INDEPENDENT ASSESSMENT OF UNDERPINNING REPORT NO. 87 A copy of the Independent Assessment of 1.inderpinning Weekly Report No. 87 for the period of May 13, 1984 th~ rough May 19, 1984 is enclosed with this letter. Included as attachments are the minutes of the daily-meetings held during the week'between members of the Assessment Team and Site Engineering, Construction, and Quality Assurance personnel.'
Ifyouhaveanyquestionswit[irespectJtothisreportplease contact me at (617) 589-2067.-
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J.o. No. 14358 Midland Plant Units 1 & 2 Independent Assessment of Underpinning Weekly Report No. 87 May 13, 1984 through May 19, 1984 Personnel on Site Stone & Webster Michigan, Inc.
P.
Majeski 5/13 - 5/15 L.
Benvie 5/14 - 5/18 D.
Zito 5/14 - 5/18 W.
Kilker 5/17 - 5/19 L.
Rouen 5/15 - 5/19 Parsons Brinckerhoff Michigan. Inc.
J.
011veria 5/13 - 5/15 B.
Metros 5/16 - 5/19 Meetings Attended Date Represented Purpose 5/14 - 5/16 Stone & Webster DailyNssessment 5/18 Bechtel Team Meeting Consumers Power Parsons 5/18 Consumers Power Weekly Bechtel Interorganizational MPQAD Meeting Stone & Webster 5/18 Consumers Power Document Control Bechtel Infor: ration Meeti.y MPQAD Stone & Webster Underpinning and Remedial Soils - Construction Pier E/W5:
Concrete placement for each pier shaft and grillage support column installations were completed. Installation of the shim plates for the bearing assemblies is ia progress.
Pier Kc8:
Excavation for the pier has progressed approximately 8 ft.
Pier E17:
Installation of the jacks and jackstands for the middle portion of the enlarged shaft is in progress.
Pier CT 3/10: The pier shafts have been excavated to founding subgrade.
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J.O. No. 14358 Midland Plant-Units 1 & 2 Independent Assessrtent of Underpinning Pier Kc5: Excavation of the pier shaft and installation of the pier shaft tudrtat was completed. Bell excavation is nearly cortplete.
Pier W17: No further activity was performed pending fabrication of
-lagging reaterials to support the enlarged shaft.
SWPS:
Installation of the upper' level wales continued on the north and west' sides. Excavation and lagging installation was completed tc El. 620' along the east side of the excavation.
BWSTs: Reinforcing' steel'forrrwork installation and concrete placement
-continued.
t Cathodic Protedtion: (Trenchexcavationandbackfillingworkcontinued.
Ascessrtent Team Observations - Construction The Assessrtent Teart perfonted an independent inspection of the reinforcing steel installed in pier E5. ; Attributes verified during the inspection included number and location, ofereinforcing steei', spacing, clear cover, splice lengths, stirrup locations, hairpin ties, Fox Howlett coupler locations and absolute dimensions. 'All attributes were deterrtined to be in accordance with design requirdments.
Fox Howlett coupler installation at W5 was overviewed by the Assessment Team. he reinforcing steel which had previously been threaded f6r the Fox Howlett couplers was properly stored at the work area to protect the threads frort dartage. Installation of the,se couplers conforrted with applicable" procedures. L e craftsrten applied _the necessary torque to the couplers as required to secure the reinforcing steel. After proper ertbedrtent of the Fox Howlett couplers was verified, the cortpleted coupler was marked by QC indicating an acceptable c
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installation.
Backpacking for pier CT 3 and the subsequent field and resident engineering inspection was overviewed by the Assessment Team Backpacking was installed and fintly tamped into place ensuring adequate contact between the lagging and in-situ soil. he inspection perforrted by resident and field engineering was thorough. his engineering inspection found one set of lagging placed on ths, previous shift where backpacking had either fallen out or was not placed. This situation was iratediately corrected.
he Assessment Team observed the entire concrete placement for the E5 pier shaft and placertent of the last lift for the W5 pier shaft. Placertent technique including lift height,, lateral rtovertent, free drop, and concrete vibration wasTin accordance with good construction practice. Field engineering and supervision supporting the placertent activities was judged to be acceptable.
The nonrtanual personnel associated with the placertent activities were know-
. ledgable of correct placettent techniques to ensure conforrtance with design requirertents.
The Assessrtent Team attended a daily direct hire rteeting. Planned activities aiid,the req 61 red engineering, quality inspection and construction support
~
I were discussed. he Assess: tent Team believes that these meetings are a useful 2
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3 J.O. No. 14358
'bEdlend Plant Units 1 & 2 Independent Assessment of Underpinning tool to aid in manpower planning for support of the direct hire work on a day-to-day basis.
Assessment Team Observations - QA/QC The Assessment Team overviewed MPQAD inspection of the upper Carlson Meter installations at pier E5. The inspector verified that dimensional require-ments including spacing, p. lumb and level conformed with the design.
MPQAD inspection of Q backfill for the cathodic protection installation was satisfactory. The inspector verified that loose lift thickness, number of passes, required overlap of passes and compaction equipment conformed with the required placement technology.
MPQAD inspection of concrete placed for the E5 pier was observed by the Assessment Team. Qualifications of the MPQAD inspector to the appropriate certifications was determined to be acceptable. The inspector verified that the US Testing personnel performing slump testing air entrainment, and preparing concrete cylinders did so in accordance with ASTM procedures.
The Assessment Team attended a quality session held to review quality require-ments associated with expansion anchor installation. The instructor emphasized the need for prerequisite documentation to be in place at the appropriate work areas and explained the purpose of the QC holdpoints. The Assessment Team believes that this session adequately provided the craftspeople with an aware-ness for the need to maintain high quality standards in performing their work.
Work Activity Packages WAP No.
Title Status (Opened) (Closed) 86 Support Brackets for 5/18/84 Kc 5.89, Ke 6 and Kc7 Turbine Building Nonconformance Identification Reports No nonconformance reports were opened or active during the past week.
Open Items OPEN ITEM - An item for which an action is required. The item will remain open until the required action has been taken. Tracking is required.
CLOSED ITEM - An item usually brought forward by the Assessment Team that is l
discussed and adequately responded to. No tracking is required.
INFORMATION ITEM - An item brought forward to provide general background information regarding work, such as work status or an upcoming design change.
No tracking is required.
OPINION ITEM - An opinion or suggestion given by the Assessment Team expressi.y an alternate ccastruction or quality assurance technique. The opinion or suggestion is given as a possible alternate that may facilitate an operation.
CLOSES ITB3 XX-XX - This notation identifies an action that closes a previously identified open item. Tracking of the item stops.
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.J.O. No. 14358 Midland Plant Units 1 & 2 Independent Assessment of Underpinning The following listing of all Open items from the Daily Meeting Notes with Bechtel and the text of the Weekly Reports. Carry-over items from past weeks which have been Closed this week are also listed.
Item No.
Description Closure
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64-10 Trend Analysis open 71-17 Computerized Civil Open Drawing Register 74-21 US Testing Corrective Open Action 79-26 Upper Leveling Plates 87-35 79-28 SWPS Backpacking Open Material 79-34 SWPS Backpacking Open Placement 81-21 BOP Construction Open Verification of Soils Work 82-9 Trend Analysis open 85-29 Auxiliary Buildi.y 87-19 Access Shaft Grout Shims 86 4 Auxiliary Building Open Cracictappi.y 87-5 Implementation of the Open QAP Task Force Recorr:tendations 87-10 Reverfication of open Previously Mapped Cracks at the BWSTs.
87-15 Excavation Conveyors Open at the SWPS 87-24 Control Tower Open Instrumentation Readi.y Ah J
Project Engineer Project Mandger
r Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland. Michigan May 14, 1984 Present For:
Consumers Power Bechtel MPQAD Stone & Webster G.
Murray J.
Fisher R.
Sevo D.
Benvie J.
Kelleher D.
Zito E.
Cviki P.
Majeski Parsons Brinckerhoff J.
Oliveira PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 87 Auxiliary Building Underpinning Activities.
Removal of drift sets and soil between piers E/W10 and.11 was completed.
Excavation of the Kc8 pier shaft has begun.
Installation of pier E5 shaft rebar is in progress.
Placement of concrete for the middle portion of the E17 enlarged pier was completed.
Excavation of the CT 3/10 pier shafts continued.
Installation of the W5 pier shaft rebar is nearing completion.
Excavation of the Kc5 pier shaft is in progress.
Level C Wale installation was completed for the west access shaft.
(INFORMATION ITEM)
Item 87 BWST Ring Bet; Additions.
J. Fisher reported that concrete for a portion of the ring beam addition at bothBWSTs will be placed today.
(INFORMATION ITEM)
Item 87 SWPS Backpacking Method.
Majeski stated that the Assessment Team had looked at the backpacking P.
at the SWPS this past weekend. The quality of the installed backpacking Mr.
has improved but there is one area that still requires upgrading.
Majeski suggested that a unifont method of backpacking might be more helpful
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Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland Michigan May 14, 1984 in assuring that the backpacking is perforneo consistently a an adequate manner.
(Item 79-34 remains OPEN) (OPINION ITEM)
Item 87 Upper Leveling Plates.
Mr.
Benvie asked if the FCR revising welding requirements for the upper leveling and bearing plate' assemblies will be issued prior to installation of this assembly at the E17 pier.
J.
Kelleher responded that the forecasted issuance date for the FCR will allow use of the revised welding
. requirements for the E17 pier.
(Item 79-26 remains OPEN) (INFORMATION ITEM)
New Items Item 87 SWEC Report
" Evaluation of Change and Nonconformance Documents."
P.
Majeski stated that followup of the recommendations contained in the SWEC report entitled " Evaluation of Change and Nonconformance Documents" will be reviewed by the Assessment Team in the near future.
The recommendations contained in the reports are associated with NCR trending. NCR and FCR process times, development of a QAP task force and availability of engineering support on site.
(INFORMATION ITEM)
Item 87 Implementation of the QAP Task Force Recommendations.
P.
Majeski requested the status of C P Co implementation of the QAP Task Force recommendations. These recommendations include revisions to selected PQCIs, construction procedures,and specifications to facilitate construction and inspection of various processes. Also, guidelines for developing future PQCIs, construction procedures and specifications associated with new construction areas are included in the task force recommendations.
G.
Murray will respond.
(OPEN ITEM)
Item 87 MPQAD Inspection Report Review.
P.
Majeski requested the status of the review being conducted of MPQAD inspection reports for ' Remedial Soils work performed prior to 9/82.
R. Sevo will respond.
(OPEN ITEM)
Item 87 Revised Loading Schedule for the E/W17 Piers.
J.
Oliveira requested that the Contractor provide details of the revised loading schedule associated with the enlarged straight shafted design for piers E/W17.
J.
Fisher will respond.
(OPEN ITEM)
Item 87 Concrete Placement Schedule for the Permanent Auxiliary Building Underpinning Wall.
D.
Zito asked for a schedule detailing monthly concrete placement quantities planned during construction of the permanent wall for the Auxiliary Building.
J.
Fisher will respond.
(OPEN ITEM)
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- Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company
-Held at Midland Site Midland, Michigan May 14, 1984 Item 87 Reverification of Previously & pped Cracks at the BWSTs.
D.
Zito requested results of the reverification survey on previously mapped cracks at the BWSTs.
E.
Cviki will respond.
(OPEN ITEM)
Item 67 Reserve Capacity kading for Piers CT 1/12.
E.
Cvik1 stated that jacking for input of reserve capacity loading (RCL) at piers CT 1/12 was performed this weekend. Lift off was attained at 120% of the specified load. Both piers were loaded to 150% of design load and locked off.
(INFORMATION ITEM)
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-Response Items No response items were addressed.
Notr, cf Daily Meeung Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 15, 1984 Present For:
Consurers Power Bechtel MPQAD Stone & Webster G.
Murray J.
Fisher R.
Sevo D.
Benvie J.
Kelleher J.
McMaster D.
Zito E.
Cviki P.
Majeski Parsons Brinckerhoff J.
Oliveira PURPOSE Ihis meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status. Items Item 87 Auxiliary Building Underpinning Activities.
Installation of expansion anchors for the pier E17 upper bearing and leveling plate assembly has begun.
Placement of grout pads for the W5 grillage support columns in the drop pit was completed.
(INFORMATION ITEM)
Item 87 SWPS Backpacking Material and Method.
J.
Fisher discussed backpacking modifications for the SWPS access shaft.
During installation of lagging, clay will be placed beneath the bottom of each lagging piece and the remaining area behind the lagging will be back-packed with sand. Previously, it was stated that clay would only be placed at the bottom of every second or thid lagging. Excelsior will be placed on an as needed basis in the spaces between the lagging. (Item 79-28 and 79-34 retains OPEN)
(INFORMATION ITEM)
Item 87 Revised Loading Schedule for the E/W17 Piers.
J.
Kelleher provided the Assessment Team with a copy of the revised loading schedule for the redesigned E/W17 piers.
(Item 87-8 remains OPEN) (INFORMATION ITEM)
New Items Item 87 Excavation Conveyor at the SWPS.
J.
Oliveira asked for the manufacturers technical data associated with the requirements for the paddle blade angle on the excavation conveyor.
It was noted that,the conveyor may have been set up at too high an angle to allow proper transport of excavated. soil.
(OPEN ITEM)
Notes of Daily Meeting Independent Assessrtent of Underpinning Midland Plant, Units 1 & 2 Consuroers Power Company Held at Midland Site Midland, Michigan May 15, 1984 Item 87 Welderete.
E.
Cvikl reported that welderete will not' be used for any applications related to the undercinning. Be decision not to use weldcrete is based on a concern with its use in a rtoist environtrent. It had previously been stated that welderete would be used for temporary underpinning applications. (INFORMATION ITEM)
Item 87 ' Installation of Expansion Anchors in Lean Concrete.
'D.
Benvie noted that installation of expansion anchors in lean concrete for the Kc5 drift supports had resulted in issuance of an NCR. he NCR was written because procedural requirertents only address installation of expansion anchors in structural concrete. Mr. Benvie asked if the procedures will be revised to include instal'.ation of expansion anchors in fill concrete.
J.
Kelleher replied that all expansion anchors are required to be installed in structural concrete. his requi.rertent is to ensure the load carrying ability of the.. expansion anchors. As a result, no procedural change will be reade. The disposition for the NCR written to address the Kc5 drift support expansion anchors installed in the lean concrete will require that these expansion anchors be reinforced to rteet design require: tents.
(CLOSED ITEM)
Resconse Iterts Itert 87 Auxiliary Building Access Shaft Grout Shirts.
E.
Cvikl responded to the Assessrtent Tearts question concerning use of grout shifts for the wales in the Auxiliary Building access shafts. Engineering has reviewed the use of grout shifts at the interface of the wale and applicable piers. Le possible effects of grout shrinkage and equiprtent vibrations on the grout shirts were evaluated. As a result, the shirts used for the E/W10 pier struts will be constructed of steel instead of arout.
(CLOSES ITEM 85-29)
Itc 87 MPQAD Inspection Report Review.
J.
McMaster discussed the review of MPQAD inspection reports for underpinning work perforrted prior to 9/82. Certification of inspectors to review these inspection reports is 'equired. Once the inspectors.have been certified,
r review of approxirtately 1300 inspection reports for underpinning work accortplished prior to 9/82 will be perfonted. It is expected that this review will be cortpleted by the last quarter of this year.
(CLOSES ITEM 87-7) i l
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Notes of Daily Meeting Independent Assessment of Underpinning
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Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 15.1984 Item 87 Concrete Placement Schedule for the Permanent Auxiliary Building Underpinning Wall.
J.
Kelleher provided the Assessment Team with a copy of the schedule detailing monthly concrete placement quantities planned during construction of the permanent underpinning wall for the Auxiliary Building.
(CLOSES ITEM 87-9) l l
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r-Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland Michigan
-May 16, 1984 Present For:
Consumers Power Bechtel MPQAD Stone & Webster G.
Murray J.
Fisher J.
McMaster D.
Benvie J.
Kelleher R.
Sevo L.
Rouen
_E.
Cviki D.
Zito Parsons Brinckerhoff B.
Fbtros PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 87 Auxiliary Building Underpinning Activities.
Placement of grout was completed for the pier E17 lower leveling plate.
Concrete placement for the W5 pier shaft was completed to E1. 597'.
Excavation of the E5 pier shaft was completed.
(INFORMATION ITEM)
Item 87 SWPS Underpinning Activities.
J.
Fisher reported that installation of the lower level bracing for the soldier pile wall along the east side of the SWPS is scheduled to begin next week.
(INFORMATION ITEM)
Item 87 Concrete Placement at BWSTs Ring Beam Addition.
J.
Fisher reported that concrete was placed yesterday for a portion of the ring beam addition at both BWSTs.
(INFORMATION ITEM)
New Items Item 87 Control Tower Instrumentation Readings.
D.
Benvie requested,that Resident Engineering provide the Assessment Team with instrumentation data associated with reserve capacity load jacking performed at piers CT 1/12 last weekend.
E.
Cvik1 will respond.
(OPEN ITEM)
r Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site hudland, Michigan May 16,1984 Item 87 Instrumentation Reading Schedule at the SWPS.
D.
Benvie asked if an instrumentation reading schedule has been developed for monitoring SWPS building movement during filling of the service water bays.
E.
Cviki will respond. (OPEN ITEM)
Item 87 West Buttress Access Shaft Footing.
J.
Fisher reported that a crack in the west buttress access shaft footing has been found in the vicinity of the Level C Wales. The cause of cracking is presently under investigation.
(INFORMATION ITEM)
Response Items Item 87 Revised Loading Schedule for the E/W17 Piers.
The Assessment Team has reviewed the revised loading schedule associated with the redesigned E/W17 piers. The schedule indicates tha't each middle pier will be loaded to 30 % of the specified design load. Once the concrete and grout for the two side piers constructed adjacent to each of the middle piers has attained the required compressive strength, the entire pier unit will be loaded in accordance with the original design requirements.
The Assessment Team concludes that the loading sequence is appropriate for the redesigned ciers.
(CLOSES ITEM 87-8)
I i
Notes of Daily Meeting Independent Assessa:ent of Underpinni.y Midland Plant, Units 1 & 2~
' Consurters Power Cortpany Held at Midland Site Midland. Michigan May 17, 1984 No rteeting was held on this date.
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Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant. Units 1 & 2
. Consumers Power Company Held at Midland Site Midland, Fuchigan May 18, 1984 Present For; Consumers Power Bechtel MPQAD Stone & Webster G.
Harray-J.
Fisher R.
Sevo D.
Beavie J.
Kelleher D.
Zito J.
Darby W.
Kilker Parsons Brinckerhoff B.
Metros PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 87 Auxiliary Building Underpinning Activities.
Concrete placement for pier E5 was completed to El. 597 ',
Excavation of the Kc5 pier shaft to subgrade and installation of the ring beam was completed. Bell excavation is in progress.
Carlson meter installation was completed for the E/W5 piers.
Excavation of the pier shaft to the top of the bells and installation of the ring beam for piers CT 3/10 has been completed.
(INFORMATION ITEM)
Item 87 Reverification of Previously Mapped Cracks at the BWSTs.
J.
Darby stated that a report by Resident Engineering summarizi.y their reverification survey of previously mapped cracks at the BWSTs will be issued next week. (Item 87-10 remains OPEN) (INFORMATION ITEM)
New Items Item 87 FSO Controlled Document Review.
J.
Fisher reported that the monthly review of the FSO controlled documents for May will be perfonted on 5/21/84.
(INFORMATION ITEM)
Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, FEchigan May 18, 1984 Item 87 CCP/ Soils Interface.
G.
Murray provided the Assessment Team with a copy of the guidelines outlining interaction between ESO and Balance of Plant relating to CCP work. Contained in the guidelines are the responsibilities for performing and inspecting work activities where Balance of Plant work is affected by Remedial Soils work.
(INFORMATION ITEM)
Item 87 Inspection of SWPS Instrumentation.
W.
Kilker asked what was the nature of the NCR written on welding inspection for the SWPS instrumentation.
J. Darby and G. Murray stated welding inspection was not performed during installation of the instrumentation. An inspection of the instrumentation welding is scheduled for early next week to verify design compliance.
(CLOSED ITEM)
Item 87 Weekly Report # 86.
The text of Weekly Report # 86 was reviewed. It was determined that all open items nac been previously identified.
(INFORMATION ITEM)
Response Items Item 87 Instrumentation Reading Schedule.
J.
Darby responded to the Assessment Team
- question concerning reading of instruments during filling of the service water bays. It is planned to read the SWPS instruments just prior to filling of the bays and immediately after filling has been completed. Another reading will be taken 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> later.
After this reading, the normal instrument reading schedule will be resumed.
Instrumentation readings may be taken during the filling operation if time permits.
(CLOSES ITEM 87-25)
Item 87 Upper Leveling Plates.
J.
Kelleher reported that the FCR revising welding requirements to reduce warping of the upper leveling and bearing plate assemblies has been issued.
The FCR reduces the size of the welds required to fasten the leveling and bearing plates together from 0.5 in. to 0.25 in. The Assessment Team believes that reduction of the weld size will be effective in reducing the warping that has previously occurred with the upper leveling and bearing plate assembly.
(CLOSES ITEM 79-26) i
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STONE & WEBSTER MICHIGAN,1
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United States Nuclear Regulatory Cmrission May 30, Midland Site Resident Office S.-) y J.O. No. 1 35E Route 7, Ref. MPF 88 Midland, Michigan Attention: Mr. B. L.
Burgess DOCKET NO. 50-339/330 MEDLAND PLANT UNIT 1 & 2 INDEPENDENT ASSESSMENT OF UNDERPINNING REPORT NO. 88 A copy of the Independent Assessment of Underpinning Weekly Report No. 88 for the period of May 20, 1984 through May 26, 1984 is enclosed with this letter. Included as attachments are the minutes of the daily meetings held during the week between members of the Assessment Team and Site Engineering, Construction, and Quality Assurance personnel.
If you have any questions with respect to this report please contact me at (617) 589-2067.
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Stanley Lucks Project Manager Enclosures ASL/pd i
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J.O. No. 14358 Nudland Plant Units 1 & 2 Independent Assessment of Underpinning Weekly Report No. 88 May 20, 1984 through May 26, 1984 Personnel on Site Stone & Webster Michigan, Inc.
P.
Majeski 5/22 - 5/26 D.
Beavie 5/21 - 5/24 D.
Zito 5/21 - 5/24 W.
Kilker 5/20 - 5/22 L.
Rouen 5/20 - 5/22 Parsons Brinckerhoff Michigan, Inc.
J.
Oliveira 5/23 - 5/26 B.
Metros 5/20 - 5/22 Meetings Attended Date Represented Purpose 5/21 - 5/25 Stone & Webster Daily Assessment Bechtel Team Meeting Consumers Power Parsons 5/25 Consumers Power Document Control Bechtel Infomation Meeting MPQAD Stone & Webster Underpinning and Remedial Soils - Construction Piers E/W5: The north support steel and the spherical bearing installations were completed in preparation for installation of the grillage beams.
Pier Kc8: The excavation of the pier shaft continued.
. Pier E17: The load transfer was completed for the middle portion of the enlarged shaft.
Piers CT 3/10: The installation of the bell reinforcing steel continued.
Pier Kc5: Concrete placement was completed. Installation of the leveling plates began.
Pier W17: No further activity was performed pending fabrication of lagging materials to support the enlarged shaft.
E/W Access Shafts:
Excavation and installation of lagging continued.
2 J.O. No. 14358 Midland Plant Units 1 & 2 Independent Assessment of Underpinning SWPS: Installation of the upper level wales continued on the north and west sides. Excavation, lagging installation and backpacking continued on the east side.
BWST: Reic. forcing steel, formwork installation and concrete placement continued.
Cathodic Protection: Trench excavation and backfilling work continued.
Assessment Team Observations - Construction
-Bell excavation and installation of bell bracing for piers CT 3 and Kc5 was observed by the Assessment Team. Sketches showing horizontal and vertical offsets for the bells were made available to the craftsmen at the work locations. These sketches are on effective tool, ensuring that bells are excavated to the proper dimensions. During excavation of the bells, the Contractor was careful to expose small areas of the bells prior to installation of the bracing for both piers. Bracing for each bell side was installed as excavation for each section of the bell was completed. This sequence of excavation and installation of bracing for both bells assured the stability of the in-situ soil.
During mass excavation of the west access shaft, a concrete spall was found at the corner of the buttress access shaft adjacent to one of'the Level C wale bearing plates. The Contractor Untediately halted excavation within the access shaft until Engineering had evaluated the impact of the spall on the Level C wales. The Assessment Team believes that the Contractor acted prudently, recognizing the potential impact of the spall on the load-carrying ability of the Level C wales. Once Engineering completed their evaluation of the spall and determined that the Level C wales had not been affected by the spall, excavation was allowed to resume.
The Assessment Team recently expressed concerns relative to the type of back-packing material and method of placement at the SWPS. The Contractor has responded to these concerns by placing clay behind the bottom portion of the lagging which effectively holds the sand backpacking material in place.
Additionally, the placement method has been revised to increase the compaction of the installed materials. Based upon observations of the placement method and the backpacking completed to date, the Assessment Team is, in general, satisfied with the revised method.
Subsequent to the completion of the upgrading of the backpacking, surface runoff resulting from a heavy rainfall washed out the backpacking in several areas along the north side of the excavation. The Contracter replaced the backpacking material and installed backfill in the eroded areas near the ground surface. Temporary dikes and sumps were installed to prevent recurrence and plans are underway to upgrade these facilities for longer term usage.
The Assessment Team reviewed a Resident Engineering report describing a recent concrete crack survey of the BWST foundations. No new or enlarged cracks greater than 10 mils were found. Crack patterns are unchanged and there have been no significant changes in crack widths since the last survey conducted
3 J. O. No. 14358 Midland Plant Units 1 & 2 Independent Assessment of Underpinning during 1982.
The Assessment Team concludes that the survey and report adequately -investigated the possibility of new cracking of these structures.
The Assessment Team reviewed a report concerning the March audit of FSO's controlled documents by the FSO Quality Engineering Group. The Assessment Team concluded that FSO is maintainimg it's documents in a satisfactory manner.
Assessment Team Observations QA/QC NIR # 26 was issued. This nonconformance concerns the closure of two NCR's related to concrete testing procedural deficiencies. The potential for hardware nonconformance was properly dispositioned. However, the Assessment Team believes that the NCRs did not adequately address implementation of corrective action to ensure future testing is properly performed.
The Assessment Team observed the control of grout mix proportions by use of a flow cone and the making of several sets of test cube samples during the' grouting of the leveling plates at pier E5. Both were performed in accordance with the procedures. The area to be grouted was kept damp and excess water was removed just prior to placement. The formwork was acceptable and the temperature conditions were checked by the Quality Control Inspector. The Assessment Team verified that the Inspector was properly cer,tified.
The Assessment Team has been following the progress of the upgrading of document control and processing FCR's. Significant progress has bee:. noted in achieving their goals in most areas. However, the Assessment Team believes increased effort is required to finalize the revised methodology for retirement of. "one-time deviations" FCR's.
Work Activity Packages The following Work Activity Package (WAP) overviews are in the open response stage or have been completed during the past week.
WAP No.
Title Status (0pened) (Closed) 86 Support Brackets 5/18/84 for Kc5.89, Kc6 and Kc7 Turbine Building Nonconformance Identification Reports The following Nonconformance Reports (NIRs) remain open or have been closed during the week.
NIR No.
Description Status (0pened) (Closed) 26 Closure of Procedural 5/25/84 Deficiencies
4 J.O. No. 14358 budland Plant Units 1 & 2 Independent Assessment of Underpinning Open Items Items' disc.ssed during meetings are categorized as follows:
OPEN ITEM - An item for which an action is required. The item will remain open until the required action has been taken. Tracking is required.
CLOSED ITEM - An item, usually brought forward by the Assessment Team that is discussed and adequately responded to.
No tracking is required.
INFORMATION ITEM - An item brought forward to provide general background information regarding work, such as work status or an upcoming design change.
No tracki.y is required.
OPINION ITEM - An opinion or suggestion given by the Assessment Team expressing an alternate construction or quality assurance technique. The opinion or suggestion is given as a possible alternate that may facilitate an operation.
CLOSES ITEM -XX-XX - This notation identifies an action that closes a previously identified open item. Tracking of the open item stops.
The following listing of all Open items from the Daily Meeting Notes with Bechtel and the text of the Weekly Reports. Carry-over items from past weeks which have been Closed this week are also listed.
Item No.
Description Closure 64-10 Trend Analysis Open 71-17 Computerized Civil Open Drawing Register 74-21 US Testing Corrective Open Action 79-28 SWPS Backpacking 88-6 bhterial 79-34 SWPS Backpacking 88-6 Placement 81-21 BOP Construction 88-13 Verification of Soils Work 82-9 Trend Analysis Open 86 4 Auxiliary Building 88-7 Crackmapping 86-16 Vibration of BWST Open Concrete
5 J.O. No. 14358 Midland Plant Units 1 & 2 Independent Assessment of Underpinning Item No.
Description Closure 87-5 Implementation of Open the QAP Task Force Reccxrxendations 87-10 Reverification of 88 8 Previously Mapped Cracks at the BWSTs 87-15 Excavation Conveyors 88-10 at the SWPS 87-24 control Tower 88-9 Instrumentation Readi.y 88-24 FSO Quality Engineering Open Group Controlled Document Audit 25 Documentation of open Buttress Access Shaft Spall Repair 88-26 NCR Dispositon of a Open Concrete Air Entrainment Deficiency hk7 fff~J+
Project Managet' Project Engineer O
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Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company
' Held at Midland Site Midland, Michigan May 21, 1984 Present For:
~ Consumers Power ~
Bechtel MPQAD Stone & Webster G.
Marray J.
Fisher J.
McMaster D.
Benvie J.
Kelleher D.
Zito E.
Cviki W.
Kilker L.
Rouen Parsons Erinckerhoff B.
Metros PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant. Units 1 & 2.
DISCUSSION
' Status Items Item 88 Auxiliary Building Underpinning Activities.
Excavation of the shafts to subgrade and installation of the concrete mudmats was completed for piers CT 3/10.
Placement of concrete-for piers FJW5 and grouting of the E5 lower leveling plate was completed.
Excavation of the bell and placement of the bell muccat was completed for pier Kc5.
Excavation for pier Kc8 is in progress.
Installation of the upper and lower leveling and bearing plates for pier E17 was completed.
(INFORMATION ITEM)
Item'88 SWPS Underpinning Activities.
J.
Fisher reported that excavation of the SWPS east access shaft will be completed this week allowing installation of the lower level wales to begin.
Excavation of the drop pit to pier No.1 is scheduled to begin in mid-June.
(INFORMATION ITEM) ew Items
n Not:s of Daily Mec' g
Ind; pend:nt A=ssment of Und;rpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site
-Midland, Michigan May 21, 1984 Item 88 West Buttress Access Shaft Concrete Spall.
J.
Fisher reported that mass excavation in the west access shaft has been halted until Engineering has completed their investigation of the concrete
_ spall at the corner of the west buttress access shaft wcll adjacent to the Level C Wale bearing plate.
E.
Cvikl stated that Engineering is presently reviewing the wale construction sequence for possible influence on develop-ment of the crack. The Assessment Team requested that Resident Engineering provide the results of their investigation once it is completed.
(OPEN ITEM)
Item 88 E/W8 Grillage Interference.
J.
Fisher reported that removal of approximately 6 in, from the top of the concrete mudmats placed between the E/W5 piers and the containment drop pits will be required to allow installation of the grillages. (INFORMATION ITEM)
Item 88 HVAC Foundation Pad.
J.
Fisher reported that excavation to allow construction of the HVAC foundation pads adjacent to the Unit 2 containment will begin today.
(INFORMATION ITEM)
Restonse Items Item 88 SWPS Backpacking Material and Placement.
The Assessment Team has monitored the Contractor'orecent activity related to backpacking techniques and material modifications for the SWPS east access shaft. The Assessment Team had expressed concern with the method and type of backpacking originally being used. In response to this concern, the Contractor modified the backpacking installation which included the place-ment of clay beneath the bottom of each lagging piece. This has proved effect-ive in maintaining the soil installed in the remaining area of the lagging in-place. Additionally, the level of effort implemented to tamp the backpacking in-place has been satisfactory in maintaining contact between the lagging and in-situ soil. The uniform methodology being implemented by the craftspeople has resulted in a consistently acceptable installation.
Based on the quality of the backpacking performed since implementation of these modifications, the Assessment Team believes thnt adequate bearing between the lagging and in-situ soil is being achieved, ensuring the overall stability of the excavation. Ihe Assessment Team will continue to monitor the adequacy of the backpacking.
(CLOSES ITEMS 79-28 and 79-34)
Item 88 Auxiliary Building Craclcrappi.v.
J.
McMaster provided the Assessment Team with a copy of the results of the MPQAD review of the recent crack mapping of the Auxiliary Building. The crack mapping was conducted after initial jacking of the CT 1/12 piers. Based on a review of the crackmapping Subcontractor's documentation and field activity associated with the mapping of 2000 cracks only two NCRs were issued. One was issued because of a failure by the Subcontractor to mark and record the
r Not:, cf Daily Meetrag Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland. Michiran May 21, 1984 elongation of one crack. The other NCR was written due to a missing signature on a data sheet. The Assessment Team believes these results demonstrate effective implementation of the crack monitoring program.
(CLOSES ITEM 86 4)
Item 88 Reverification of Previously Mapped Cracks at the BWSTs.
E.
Cviki provided the Assessment Team with a copy of an engineering report detailing the results of a reverification crack survey conducted at the existing BWST rin walls. No new cracks having widths of 10 tils or greater were found.
(CLOSES ITEM 87-10)
Item 88 Control Tower Instrumentation Readings.
E.
Cviki provided the Assessment Team with a copy of instrumentation data associated with reserve capacity load (RCL) jacking at piers CT 1/12.
Absolute and relative movement of the Control Tower was minimal during the RCL jacking of piers CT 1/12.
(CLOSES ITEM 87-24)
Item 88 Excavation Conveyor at the SWPS.
J.
Fisher provided the Assessment Team with the manufacturer's technical data for set up of the conveyor system at the SWPS. The conveyor presently is elevated greater then the manufacturers specified angle of 25'-35*.
To assure proper transport of excavated soil on the conveyor, side guards will be added as required to prevent rollback of soil down the conveyor.
(CLOSES ITEM 87-15)
r-Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consurters Power Cortpany Held at Midlar.d Site Midland, Michigan May 22, 1984 Present For:
Consumers Peaer Bechtel MPQAD Stone & Webster G.
Murray J.
Fisher None D.
Benvie J.
Kelleher D.
Zito E.
Cvikl W.
Kilker P.-
Goguen L.
Rouen Parsons Brinckerhoff B.
Metros PURPOSE
- Dais meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant. Units 1 & 2.
DISCUSSION Status Items Item 88 Auxiliary Building Underpinning Activities.
Bell excavation for piers CT 3/10 is in progress.
' Reinforcing steel installation for pier Kc5 is in progress.
Excavation of the west access shaft to El. 591.5' has begun.
(INFORMATION ITEM)
Item 88 12 - Vibration of BWST Concrete.
Goguen discussed modifications which will be implemented to ensure F.proper vibration of concrete in areas of heavy reinforcing steel congestion.
Reinforcing steel will be bundled to allow passage of a pencil vibrator into congested areas. Additionally,a pea gravel concrete mix with a 5-6 inch slump will be used to ensure full penetration of the concrete The Assessment Team will monitor implementation into the congested areas.
of these modifications for their effectiveness on upcoming concrete place-(Item 86 16 rettains OPEN) (INFORMATION ITEM) ments.
l New Items No new items were discussed.
Response Items
r-NotGs of Daily Meecing Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 22, 1984 Item 88 BOP Construction Verification of Soils Work.
Fisher provided the Assessment Team with guidelines which will be J.
implemented when Balance of Plant (BOP) construction verification in required related to Remedial Soils work. The FSO field engineer responsible for a particular work activity shall notify the appropriate Area and System Teams when BOP verification is required. The BOP Area and System Teams will in turn arrange for the necessary interface with MPQAD. All FSO field engineers have been' provided with these guidelines and are familiar with those work activities which require BOP verification. The Assessment Team believes that these guidelines will adequately ensure BOP construction verification of Remedial Soils work as required.
(CLOSES ITEM 81-21) 9
p Notes of Daily Meeting Independent Assessment of Underpinning-Midland Plant. Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 23, 1984 Present For:
Consumers Power Bechtel MPOAD Stone & Webster J.
Schaub J.
Fisher J.
McMaster D.
Benvie J.
Kelleher R.
Sevo D.
Zito E.
Cviki P.
Majeski B.
Brandes Parsons Brinckerhoff J.
Oliveira PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessme.~.t at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 88 Auxiliary Building Underpinning Activities.
Installation of the jacks and jackstands for the middle portion of the
- enlarged E17 pier was completed.
Installation of the upper leveling plates at the jack location closest to the containments was completed for_ the E/W5 grillages.
Installation of reinforcing steel was completed for pier Kc5.
(INFORMATION ITEM)
Item 88 SWPS Underpinning Activities.
J.
Fisher reported that backpacking had been eroded from behind the lagging in several areas yesterday as a result of the heavy rainfall.
Additionally. the in-situ soils were eroded from behind the wall in limited areas. particularly along the east end of the north wall.. FSO will meet with the SWPS underpinning Subcontractor later today to decide on a course of action for repair of these eroded areas.
(INFORMATION ITEM)
New Item Item 88 Control of Surface Drainage at the SWPS.
P.
Majeski requested ESO to provide details for future control of surface drainage in the vicinity of the SWPS to prevent reoccurrence of erosion problems experienced during yesterdays rainfall.
J.
Fisher will respond.
(OPEN ITEM) m m.
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Notes of Daily Meeting Independent Assessment of Underpinnirg a
Midland Plant. Units 1 & 2 Consurers Power Company Held at Midlar.d Site e
Midland. Michigan May 23. 1984 y
Iten7 680 Verification of Survey layout.-
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J.
Oliveira noted that an NCR had been written because 11 expansion anchfrs for the middle upper leveling plate at the E5 grillage were incorrectly located. he NCR disposition requires that, these expansion anchors be reinstalled in their correct locations. Mr. Oliveira asked if the " survey
- loop" is closed during the initial layout process in order to verify correct layout of a constr0ction activity.
J. Fisher will respond.
(OPEN ITEM)
Item 88 18 - FSO ntrolled Document Review.
J.
Fisher stated thatlhe' monthly review of the FSO controlled documents for May was completed.- h e renu.ts of the review will be made available' to the Assessment Team tomorrow.
(INFORMATION ITEM)
~
Item 88-19
, Drift Invert, Concrctc.
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D.
Zito notelthat a small portion of tne concrete face for the Kc3 to Kc4 drift invert had broken off in the yleinity of the W5 pier, where soil had been excavated from beneath the drin. invert. he break occurred along the flange of 'd steel reshore member embedded in the drift concrete. Mr.
Zito asked if' provisions have been made to prevent this condition from occurring.in other drift invert areas.
J.
Fisher will respond.
(OPEN ITEM) w Response. Item
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Item 88-20 i.- West Buttress Access Shaft Concrete Spall.
E.
Cviki reported that engineering has completed their evaluation of the concrete spall at the corner of the west buttress access shaft wall. Be
- space which is adjacent to the level C wale bearing plate is superficial.
extending back only to the first layer of reinforcing steel. After reviewing the construction sequence associated with the level C wale installation, it is thought that preheating of the wales and/or the bearing plates in the vicinity of the buttress access shaft tr.ny have contributed to the spalli.v.
l It is not believed that this spalling has decreased the load carrying ability
' ~of the wales. In order to verify this, the tension of the bearing plate bolts will be checked. If the actual bolt torque agrees with the design torque, this indicates that the ability of the spalled area of the wall to carry the nontal load from the wales has not been diminished. Excavation in the west access shaft will then be allowed to resume. Repair of the spalled area will l
be accomplished in the future.
(CLOSES ITEM 88-3)
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Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant. Units 1 & 2 Consumers Power Certrany Held at Midland Site Midland. Michigan May 24. 1984 Present For:
~~ Consumers Power Bechtel MPQAD Stone & Webster G.
Murray J.
Fisher J.
McMaster D.
Benvie J.
Kelleher R.
Sevo D.
Zito E.
Cviki P.
Majeski J.
Givens Parsons Brinckerhoff J.
Oliveira PURPCSE Ihis meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 88 Auxiliary Building Underpinning Activities.
Concrete placement was completed for pier Kc5.
Load transfer for the middle portion of the enlarged E17 pier is scheduled for today.
(INFORMATION ITEM)
Item 88 SWPS Underpinning Activities.
J.
Givens discussed rework of backpacking in areas behind the soldier pile wall which had been eroded during the heavy rainfall on 5/22/84 All areas where backpacking and in-situ soil have been eroded will be reworked. Eroded areas of the in-situ soll which are accessible behind the wall will be filled in with sand placed from the top of the wall. All other eroded areas will be filled in with sand placed between the lagging pieces. All new material will be tamped into place to ensure complete filling of the voids created during the erosion process.
In conjunction with filling the voids behind the soldier pile wall, backpacking directly behind and between the lagging will be accomplished with clay and sand as before.
(INFORMATION ITEM)
New Items Item 88 Central Document Control Deficiency Notification.
P.
Majeski asked when deficiencies are found during review of the FSO controlled documents are these findings conveyed to the Central Document Control.
J.
Fisher stated that any deficiencies discovered during periodic reviews of their controlled documents are forwarded to the Central Document Control for resolution if the deficiencies involve changes to the original document.
Such deficicacies include errors with the controlled document register or a rtissing R stamp.
(CLOSED ITD4)
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Q Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 24, 1984 Item 88 FSO Quality Engineering Group Controlled Document Audit.
~ P. Majeski noted that as a result of the ESO controlled document review performed by FSO Quality Engineering group it was reconxended that a more diligent effort is needed in replacing illegible and torn drawings.
Mr. Majeski asked what action has or will be taken by ESO to address this recommendation.
(OPEN ITEM) 1 Item 88 Documentation of Buttress Access Shaft Spall Repair.
D.
Zito asked what method is used to document the conditions and remedial measures contained in the Safety Concern Evaluation Report written due to concrete spalling on the Buttress Access Shaft wall. It was noted that the buttress access shaft is a non Q ctructure and therefore an NCR is not required.
E.
Cviki will determine what documentation is used to document the contents of the Safety Concern Evaluation Report.
(OPEN ITEM)
Item 88 NCR Disposition for Concrete Air Entrainment Deficiency.
It was noted that an NCR written because a concrete air entrainment test taken during concrete placement at pier W5 was not performed at the point of placement, but rather at the back of the concrete truck J.
Oliveira said the NCR disposition adequately addressed the hardware issue associated with the testing and the air entrainment test results were acceptable. However, the NCR did not address implementation of corrective action to ensure future testing is performed properly.
Mr. Oliveira requested that this concern be addressed. FPQAD will respond. (OPEN s
ITEM)
Item 88 SWPS Instrumentation Data.
E.
Cviki provided the Assessment Team with a copy of instrumentation data readings taken before, during and after filling of the SWPS bays. A review of the data indicates that absolute downward movement of the SWPS was minimal varying from 0.01 in at the north end of the structure to 0.04 in, at the south end. (INFORMATION ITEM) s Response Items Item 88 ~ Drift Invert Concrete.
KelleherrespondedtotheAssessbIentTeamquestionconcerningcrackingof J.the drift invert concrete. The cracks 1resulted from loads applied to the invert.
hre may still be some localized areasJwhere soil excavation beneath drift inverts Will leave the concrete unsupported but it is not anticipated that the loads in other drift invert areas will be applied as was the case near pier W5.
(' CLOSES ITEM 88-19)
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Notes of Daily Meeti.4 Independent Assessment of Underpinning Midland Plant, Units-1 & 2 E
Consumers Power Company Held at Midland Site Midland, Michigan May 24, 1984 Item 88 Verification of Survey Layout.
J.
Fisher responded to the Assessment Team question concerning verification of the survey layout for the expansion anchors at the E5 grillage Y-jack location. Initially, control points are laid out in a closed loop verifying correct location of the control points. Control points, in turn, serve as reference markers for layout of such items as these expansion anchors.
Contrary to normal practice, in this particular case the anchor locations were not adequately checked with respect to the control point reference locations.
(CLOSES ITEM 88-17) l l
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Not9s of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 25, 1984 Present For:
Consumers Power Bechtel MPQAD
_ Stone & Webster G.
Murray J.
Fisher J.
McMaster P.
Majeski J.
Kelleher R.
Sevo E.
Cviki Parsons Brinckerhoff J.
Oliveira PURPOSE This meeting is held each day to discuss items regarding the Independent Soil Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 88 Auxiliary Building Underpinning Activities.
The mud mats for piers CT/3 and CT/10 will be placed today.
The loose concrete in the spall area on the corner of the West Buttress Access Shaft will be removed to eliminate a potential safety hazard.
(INFORMATION ITEM)
Item 88 SWPS Underpinning Activities.
The backpacking required to repair those areas washed out during the heavy rainfall this week has been completed. (INFORMATION ITEM)
New Items There were no new items discussed.
Response Items Item 88 control of Surface Drainage at the SWPS.
J.
Fisher provided the Assessment Team with a sketch showing the proposed method to prevent flow of surface runoff into the SWPS Access Shaft. The Assessment Team is satisfied that the proposed bents and sumps will prevent flow into the Access Shaft in the future.
(CLOSES ITEM 88-16)
Item 88 NCR Disposition for Concrete Air Entrainment Deficiency.
J.
McMaster ir.dicated that since the hardware nonconformance was properly dispositioned and the individual responsible for the concrete testing
'is now aware of procedural requirements, it is not necessary to reopen the NCR or write a QAR.
P.
Fhjeski acknowledged the response but stated that the item will remain open pending evaluation. (Item 88-26 remains OPEN)
(CLOSED ITEM)
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STONE & WEBSTER MICHIGAN, INC.
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_b te United States Nuclear Regulatory Conrission June 6, 1984 Midland Site Resident Office Route 7, J.O. No. 14358 Midland, Michigan Ref. MPF 89 Attention: Mr. B. L.
Burgess DOCKET NO. 50-339/330 MIDLAND PLANT UNITS 1 & 2 INDEPENDENT ASSESSMENT OF UNDERPINNING REPORT NO. 89 A copy of the Independent Assessment of Underpinning Weekly Report No. 89 for the period of May 27, 1984 through June 2, 1984 is enclosed with this letter. Included as attachments are the minutes of the daily meetings held during the week between members of the Assessment Team and Site Engineering, Construction, and Quality Assurance personnel.
If you have any questions with respect to this report please. contact me at (617) 589-2067.
s/N-S.
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Stanley Lucks Project Manager Enclosures ASL/pd J/
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No. 14358 Midland Plant Units 1 & 2 Independent Assessment of Underpinning Weekly Report No. 89 May 27, 1984 through June 2, 1984 Personnel on Site Stone & Webster Michigan, Inc.
P.
Majeski 5/27 - 5/29 D.
Benvie 5/29 - 6/1 D.
Zito 5/29 - 6/1 W.
Kilker 5/29 - 6/2 L.
Rouen 5/20 - 6/2 Parsons Brinckerhoff Michigan, Inc.
J.
Oliveira 5/27 - 5/29 B.
Metros 5/30 - 6/2 Meetings Attended Date Represented Purpose 5/29 - 6/1 Stone & Webster Daily Assessment Bechtel Team Meeting Consumers Power Parsons 6/1 Consumers Power Weekly Bechtel Interorganizational MPQAD Meeting Stone & Webster l;
Underpinning and Remedial Soils - Construction E/W5 Grillages:
Placement and alignment of the grillage beams was completed.
l Installation of the upper leveling and bearing plate assemblies for the three l
Jack locations at each grillage is in progress.
Pier Kc8: Bell excavation and placement of the concrete mudmat was completed.
Reinforcing steel installation is in progress.
l Pier E17: Routine rejacking following initial load transfer of the center portion of the pier was completed.
Extension of the drift to permit enlarging the pier has begun.
Piers CT 3/10: Placement of bell concrete was completed. Installation of
- shaft reinforcing steel and instrumentation is in progress.
~
I Pier Kc5: Installation of the upper and lower leveling and bearing plate
- assemblies was. completed.
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J.O. No. 14358 Midland Plant Units 1 & 2 Independent Assessment of Underpinning Pier W17: No further activity was perfonr.ed pending fabrication of lagging materials to support the enlarged shaft.
East / West Access Shaft:
Excavation for zones Y/Z3 (El. 591.5') neared completion.
SWPS:
Installation of the upper level wales continued on the north and west sides. Excavation of the east access shaft was extended to El. 619.
BWST: Reinforcing steel, formwork installation, and concrete placement continued.
Cathodic Protection:
Trench excavation and backfilling work continued.
Unit No. 2 HVAC Foundation Pad: Excavation for installation of the foundation pad was completed.
Assessment Team Observations - Construction At the Auxiliary Building, the Assessment Team observed the Contractors' activities associated with extending the east and west access shafts to El. 591.5'.
Each of the temporary slopes from the shaft perimeter toward the E/W8 grillages was excavated in accordance with the design drawings.
Installation of lagging and backpacking for the access shafts followed closely as the excavation proceeded, minimizing the potential for loss of ground. The Contractor was careful to minimize vertical and lateral over excavation as the work progressed.
After installation of several lagging pieces for each wall panel, the craftsmen tamped the backpacking into place,thus ensuring proper bearing between the lagging and in-situ soil. Seepage of groundwater into the southeast corner of the east access shaft was effectively controlled. The Contractor installed a horizontal drain into the soil behind the wall and the area around the drain pipe was then grouted, forcing the water through the pipe and in turn to a sump.
Installation of the E/WS grillage beams began this week. The Assessment Team observed placement, alignment and the independent survey for final location verification of the grillage beams. The beams were carefully moved through the highly restrictive access area and set at their placement locations without damage to the members. Transverse and longitudinal alignment and plumb were verified throughout the installation process. Scribe marks on top of the beams served as the primary alignment points although periodic checks were made at the beam and bearing pad interface for additional survey control.
Once the Subcontractor completed placement and alignment of the beams, the Contractor conducted an independent verification survey of the installation.
The survey verified that the beam locations were accurate, satisfactorily
~
completing the placement and alignment activity.
1he Assessment Team inspected the completed reinforcing steel and embedded plate installations for piers CT 3/10. 'The inspection verified that the
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J.O. No. 14358 bEdland Plant Units 1 & 2 Independent Assessment of Underpinning number, size, location and spacing of reinforcing steel conformed with the design drawings, Additionally, the stagger for the Fox-Howlett couplers and location of the embedded plates on the north side of the piers were determined to be in compliance with design requirements.
Excavation, lagging installation, and backpacking of the SWPS east access shaft is nearing completion. Aided by careful in-process inspection and supervision by both Resident Engineering and Field Engineering and the use of a consistent installation methodology, the backpacking continues to improve.
The Assessment Team over-viewed concrete pre-placement and placement activit-ies for construction of the Unit 2 BWST ring beam addition. Prior to place-ment, the area was thoroughly cleaned of all debris and water was removed by means of sumping.
Forms were adequately braced and tight to prevent loss of mortar.
Removable formwork spreaders were installed to ensure proper reinforcing steel clear cover was maintained during concrete placement. Pre-planned concrete placement points were designated and backup concrete vibrators were made available to ensure continuous placement of concrete once the work started.
During placement, concrete was placed so that the maximum allowable lift thickness was not exceeded.
In areas of heavy rein-forcing steel congestion, the steel was bundled to allow passage of pencil vibrators into all areas of the placement to ensure thorough consolidation of the concrete.
The Assessment Team concluded that the Contractors' activities for concrete placeme5t, especially in areas where the reinforcing still is heavily congested were acceptable.
Assessment Team Observations - QA/QC The Assessment Team reviewed the FSO report sumrarizing the results of the self audit conducted at their controlled drawing station and at various workprint stations. Five hundred and twenty one documents out of a total of 2,150 were reviewed for correct revision number, proper posting of attach-ments, legibility and proper identification stamps.
The report indicated that missing attachments to drawings continues to be a problem but that the computerized register was accurate. Actions being taken to address the identified problem include the addition of clerical staff to maintain the documents and the reduction in the backlog and cycle time for distribution of documents. The Assessment Team believes these actions to be appropriate in addressing the problems noted during the self-audit. The Assessment Team expects the results of the next self-audit, scheduled for mid-June, to show fewer attachment-related problems.
The Assessment Team reviewed a group of NCRs and 10 QARs that were recently dispositioned.
In general, the descriptions contained on these MPQAD forms were clear and concise. The nonconforming conditions were detailed, including occasional sketches, and the resulting dispositions were complete in terms of addressing the specific nonconfonrance plus any document changes that tray have been required. In the cpinion of the Assessment Team, one-of these NCRs was vague in tenr.s of the information that had been available for evaluation of the disposition.
I u
J.O. No. 14358 Midland Plant Units 1 & 2
-Independent Assessment of Underpinning Work Activity Packages The following Work Activity Packages (WAPs) overviews are in the open response stage or have been completed during the past week.
WAP No.
Title Status (Opened) (Closed) 86 Support Brackets 5/18/84 5/31/84 for Kc5.89, Kc6 and Kc7 Turbine Building Nonconfortrance Identification Reports The following Nonconformance Reports (NIRs) remain open or have been closed during the week.
NIR No.
Description Status (Opened)(Closed) 26 Closure of 5/25/84 Procedural Deficiencies Open Items Items discussed during meetings are categorized as follows:
OPEN ITEM - An item for which an action is required. The item will remain open until the required action has been taken. Tracking is required.
CLOSED ITEM - An item, usually brought forward by the Assessment Team t'--
is discussed and adequately responded to. No tracking is required.
INFORMATION ITEM - An item brought forward to provide general background l
infortration regarding work, such as work status or an upcoming design change.
l No tracking is required.
OPINION ITEM - An opinion or suggestion given by the Assessment Team expressing l
an alternate construction or quality assurance technique. The opinion or l
suggestion is given as a possible alternate that may facilitate an operation.
CLOSES ITEM -XX-XX - This notation identifies an action that closes a previously i
identified open item. Tracking of the open item stops.
The following listing of all Open item from the Daily Meeting Notes with Bechtel and the text of the Weekly Reports. Carry-over items from past weeks which have l
been Closed this week are also listed.
Item No.
Description Closure 64-10 Trend Analysis 89-27 71-17 Ccrr.puterized Civil Open l
Drawing Register 74-21 US Testing Corrective Open 1
Action
9 J.O. No. 14358 Midland Plant-Units 1 & 2 Independent Assessment of. Underpinning Item No.
Description Closure 9 Trend Analysis' 89-27 86-16 Vibration of BWST 89-15 Concrete
,87 Implementation of 89-11 the QAP Task Force Recomendations 88-24 FSO Quality Engineering 89-26 Group Controlled Document Audit 88-25 Documentation of Open Buttress Access Shaft Spall Repair 88-26 NCR Disposition of 89-12 a Concrete Air Entrainment Deficiency 89-7 Level C Wale open Bearing Plate.
Gap 89-10 Access Shaft Open Soldier Piles 89-23 Incorporation of open "One Time Deviation" FCRs
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2 Not s of Daily Meetire Independent Assessment of Underpinning Midland Plant, Units-1 & 2 Consumers' Power Company Held at Midland Site Midland, Michigan May 28,.1984.
No meeting was held on this date.
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Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 29, 1984 Present For:
Consumers Power Bechtel MPCAD Stone & Webster R.
Wieland J.
Fisher J.
McMaster P.
Majeski J.
Kelleher R.
Sevo D.
Benvie E.
Cvikl D.
Zito Parsons Brinckerhoff J.
Oliveira PURPOSE-This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 89 Auxiliary Building Underpinning Activities.
Concrete placement was completed for the CT 3/10 pier bells.
Installation of the bearing plates is in process for the jack locations at the E/W5 grillages.
Load lock off has been completed for the middle portion of the enlarged E17 pier. Routine rejacking is in progress.
Shaft excavation fbr pier Kc8 has proceeded to the top of the bell.
Excavation in the east and west access shafts continued.
(INFORMATION ITEM)
Item 89 SWPS Underpinning Activities.
J.
Fisher reported that excavation of the east access shaft has resumed.
Excavation work had been halted while areas behind the lagging which had been washed out during last week'sheavy rainfall were repaired.
(INFORMATION ITEM)
Item 89 Vibration of BWST Concrete.
J.
Kelleher reported that a pea gravel concrete mix will not be used for the BWST ring beam addition. Previously it was reported that a pea gravel would be used to ensure full penetration of concrete into access of high reinforcing steel congestion. It is still planned to bundle rebar and use pencil vibrators to ensure proper vibration of concrete in congested areas.
(Item 86-16 remains OPEN) (INFORMATION ITEM)
Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 29, 1984 Item 89 Trend Analysis.
J.
McMaster stated that-the first monthly report summarizing the results of the MPQAD tracking activity of Remedial. Soils related NCRs will be issued this week. This tracking activity is being performed to compliment the M-2 manual trending which is ongoing.
(Item 64-10 and 82-9 remain OPEN) (INFORMATION ITEM)
New Items Item 89 SWPS Instrumentation Readings.
E.
Cvikl reported that one of the electrical extensometers in the SWPS had shown an alert level reading over the weekend. A subsequent check of the mechanical dial gage on the extensometer did not indicate that the alert level had been reached.
It is believed that water drainage from a pipe above the extensometer may have affected the electrical instrumentation reading.' Resident Engineering is presently investigating the cause of the alert level reading.
(INFORMATION ITEM)
Item 89 MPQAD Trend Reports.
D.
Zito requested that MPQAD provide copies of the M-2 manual trending recorts for February 1984 through April 1984.
J.
McMaster will respond.
(OPEN ITEM)
Item 89 Level C Wale Bearing Plate Gap.
P.
Majeski stated that he observed a small gap along the edge of the Level C wale bearing plate adjacent to the spalled concrete on.the West Buttress Access Shaft wall.
Mr.
Majeski requested that FSO or Engineering determine if the gap is related either to scalling or the result of movement.
E.
Cvikl will respond.
(OPEN ITEM) p Item 89 Hold Tags for Tubular Steel Lagging.
l P.
Majeski noted that a Hold Tag describing welding deficiencies associated with a tubular steel lagging piece had been removed and reattached to a piece of wood lagging. It was noted that recent correspondence from Bechtel requested the Underpinning Subcontractor to reinstruct it's employees as to the requirements of tne NCR Hold Tag system. Mr. Majeski asked if this retraining has been completed.
J.
Fisher will respond.
(OPEN ITEM)
Item 89 Service Water Line Backfill.
J.
Oliveira stated that during inspection of the backpacking behind the soldier pile wall along the north side of the SWPS a zone of loose backfill was found beneath the west 36 in diameter service water line of Train A.
Mr., Oliveira asked what will be done to correct this situation.
J.
Fisher will respond.
(OPEN ITEM)
t Notts of D311y Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Nudland, Michigan May 29, 1984 Item 89 Auxiliary Building Access Shaft Soldier Piles.
J.
Fisher reported that two soldier piles in each access shaft were not installed to their full design length. The soldier piles which were supposed to have been seated onto the east and west buttress access shaft footings were installed approximately 4 in, and 24 in.
too short,. respectively.
Engineering is presently evaluating corrective action. The Assessment Team requested that Engineering crovide details of their evaluation once it is completed.
E.
Cviki will respond.
(OPEN ITEM)
Response Items Item 89 Ltplementation of the QAP Task Force Recommendations.
CP Co addressed the Assessment Team question concerning implementation of the QAP Task Force recommendations. The recommendations which include revisions to selected PQCIs, construction procedures and specifications to facilitate construction and inspection of various processes have been accepted by CP Co. Additionally CP Co agrees with the guidelines recommended by the task force for developing new PQCIs, codstruction procedures and specifications or making major revisions to existing procedures. CP Co has directed the Contractor to implement these guidelines.
(CLOSES ITEM 87-5)
Item 89 NCR Disposition for Concrete Air Entrainment Deficiency.
The Assessment Team has reviewed the MPQAD response addressing implemen-tation of corrective action to ensure future concrete air entrainment testing is performed properly. MPQAD stated that the individual who was responsible for the brproper concrete testing has been made aware of procedural requirements and no further corrective action is required.
A review of additional NCRs by the Assessment Team found one other incident where a procedural deficiency associated with exceeding the time limit for performance of concrete aggregate testing was noted.
The NCR response addressed the hardware issue associated with the testing but did not adequately address the procedural deficiency. The Assessment Testbelieves that the procedural deficiencies identified in these two NCRs should be addressed to ensure future concrete testing is properly performed.
As a result NIR # 26 was issued on 5/25/84 (NIR # 26 is OPEN)
(CLOSES ITEM 88-26)
g Not;o of Daily Meecing Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 30, 1984 Present For:
Consumers Power Bechtel MPOAD Stone & Webster G.
Murray J.
Fisher J.
McMaster D.
Benvie E.
Cviki R.
Sevo W.
Kilker D.
Zito Parsons Brinckerhoff B.
Metros PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 89 Auxiliary Building Underpinning Activities.
Placing and alignment of grillage beams for the E/W5 piers is in progress.
Placement of the Kc5 upper leveling plate grout was completed.
Placement of the concrete mudmat for the Kc8 pier shaft was completed.
(INFORMATION ITEM)
Item 89 Trend Analysis.
J.
McMaster provided the Assessment Team with a copy of the first montnly report summarizing the results of the MPQAD tracking activity of Remedial Soils related NCRs.
(Item 64-10 and 82-9 remains OPEN)
New Items No new items were discussed.
Response Items Item 89 Vibration of BWST Concrete.
The Assessment Team observed placement of concrete for the Unit 2 BWST ring beam addition in an area of high reinforcing steel congestion. To address the Assessment Team's concern with proper concrete vibration in heavily congested areas. the Contractor bundled the reinforcink' steel and used pencil vibrators to allow access into all areas of the placement.
The Assessment Team believes implementation of these modifications was effective in ensuring proper vibration of concrete throughout the placement area.
(CLOSES ITEM 86-16)
(
Notes.of Daily Meeting Independent Assessment of' Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 30, 1984 Item 89 MPQAD Trend Reports.
J.
McMaster provided the Assessment Team with copies of the MPOAD manual trending reports for February 1984 through April 1984. (CLOSES ITEM 89-6)
Item 89 Hold Tag Repositioning.
J.
Fisher and J.
McMaster responded to the Assessment Team question on the repositioning of a Hold Tag for steel lagging to be used in the Auxiliary Building underpinning. The tag had not been intentionally moved but had fallen from the lagging and then re-attached by QC personnel.
FSO has.nevertheless, reinstructed field personnel as to the requirements of the NCR Hold Tag system.
(CLOSES ITEM 89-8)
Item 89 Service Water Line Backfill.
J.
Fisher responded to the Assessment Team concern of loose backfill beneath the west Train A service water line. After investigation, ESO concurs that the material that extends well beyond the backpacking zone is loose. However, no butediate remedial action is required since in the course of the planned Phase II construction this pipe will be rebedded within the next few months.
(CLOSES ITEM 89-9)
Notes of Daily Meeting Independent Assessment of Underpinning
. Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan
.May 31, 1984 Present For:
' Consumers Power Bechtel MPQAD Stone & Webster G.
Murray J.
Fisher.
J.
McMaster W.
Kilker J.
Kelleher R.
Sevo D.
Benvie J.
Darby D.
Zito Parsons Brinckerhoff None PURPOSE
'Ihis meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION
-Status Items Item 89 Auxiliary Building Underpinning Activities.
Installation of reinforcing steel in the CT 3/10 pier shafts is in progress.
Installation of jacks and jackstand for pier Kc5 is in progress.
Widening of the E17' drift to enlarge the shaft for the E17 pier is scheduled-to begin today.
(INFORMATION ITEM)
Item 89 US Testing Corrective Action.
W.
Kilker requested the status for final issuance of the US Testing Quality Control Procedures (QCPs) with the attached work instructions.
J.
Fisher stated that the QCPs have been approved as noted. US Testing is presently incorporating coments and will resubmit the QCPs for final approval in the near future.
(Item 74-21 remains OPEN)
(INFORMATION ITEM)
New Items Item 89 SWPS Drawings.
D.
Zito discussed his review of two recently revised SWPS drawings. It was noted that the two drawings which pertain to installation of the plate load test assembly for pier No.1 were marked up with a large number of corr 2 rents.
One drawing contained 84 ccurrents while 67 cornr.ents were identifie~d on the other drawing. Mr. Zito stated that these drawings were quite difficult to use because of the number of coments.
(OPINION ITEM)
Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan May 31,' 1984 Item 89 SWPS Phase II B Cofferdam.
D.
Benvie asked if the cantilevered soldier pile wall concept is still being considered for construction of the SWPS Phase II B Cofferdam.
J.
Fisher stated that the original concept consisting of a braced soldier pile wall cofferdam will be implemented. The braced concept will be used because the bracing is needed to support utilities in addition to providing lateral support for the cofferdam.
(CLOSED ITEM)
Item 89 NCR for SWPS Backcacking Erosion.
L.
Rouen discussed an NCR written due to erosion of the SWPS backpacking during last week's heavy rainfall. L e NCR disposition stated that all eroded areas behind the soldier pile wall would be backfilled as directed by the Resident Geotechnical Engineer. Additionally, the NCR stated a sand-bag berm and sumps had been installed around the perimeter of the east and west access shafts to prevent future washouts. Mr.
Rouen noted that all the berm end sumps had not yet been installed and asked why the NCR was closed out.
J.
Fisher responded that the disposition wording should have stated that the sandbag berm and sumps will be installed as part of the corrective action.
It was noted that the filling of the eroded areas, which is Q related, had been completed prior to NCR closure. L e earth berm and sump system are not consid-ered Q related work.
(CLOSED ITEM)
Item 89 SWPS Instrumentation Reading.
J.
Darby stated that Resident Engineering completed their investigation of the cause for the alert level readings at one of the SWPS extensometers earlier this week.
It was determined that the extensameter has malfbnctioned because of water drainage onto the instrument from a pipe above.
(INFORMATION ITEM)
Item 89 Assessment Team Con 2 tents on a Recent QAR.
L.
Rouen summarized the Assessment Team observations on a QAR issued by MPQAD subsequent to the May 23 erosion of soil behind portions of the SWPS access area lagging. h e QAR noted that the Subcontractor's procedure does not adequately address means to control " groundwater / rainwater runoff" into the excavaticn.
In reply, FSO offered a lengthy technical definition of ground-water in defense of the content of the existing procedure. The Assessment Team believes that MPQAD could have used an alternate means of requesting a clarification on this issue such as, a Request for Infontation. In addition, the Team feels that the FSO response was wrftten primarily to refute the QAR. As a more positive approach FSO could have emphasized the actual measures being taken to guard against fbture potential erosion.
(OPINION ITEM) v
r-Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2-Consumers Power Company Held at Midland Site Midland, Michigan May 31, 19816 Response Items Item 89 FSO Quality Engineering Group Controlled Document Audit.
J.
Fisher responded.to the Assessment Team question concerning replacement of illegible and/or torn drawings at workprint stations. Field engineers have been directed by memo to ensure that during their daily review of new documents posted at a particular workerint station, they also identify and reclace any torn or illegible drawings with copies.
(CLOSES ITEM 88-24)
Itert 89 Trend Analysis.
W.
Kilker stated that the Assessment Team has reviewed the MPOAD Soils NCR Tracking Report issued for the month of April. 'Ihis Tracking Report contains a su:ntary of the number of Inspection Reports (irs). the number of inspection sign-offs, the number of attributes inspected and the number of NCRs and non-conforming items. In addition, there is a narrative on any major areas of NCRs and plots relating non-conforming items in several different areas _of the number of inspection sign-offs. The Team believes this monthly report combined with the standard monthly M-2 trending report and the monthly FSO trending report adequately address the item raised on NCR trending in the Assessment Team report of October 1983 entitled " Evaluation of Change and Nonconformance Documents."
(CLOSES ITEM 64-10 and 82-9) l 5
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' Notes.of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company.
Held at Midland Site Midland, Michigan June 1, 1984 Present For:
Consumers Power Bechtel M?QAD Stone & Webster G.
Murray J.
Fisher
.J. McMaster W.
Kilker E.
Cvikl R.
Sevo D.
Benvie J.
Kelleher D.
Zito L.
Rouen Parsons Brinckerhoff B.
Metros PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Item 89 AuxiliaryBuilding Underpinning Activities.
The first lift of concrete for thu CT 3/10 pier shafts is scheduled for 6/3/84.
Excavation of the Kc8 pier bell was completed. Placement of the bell concrete rtudmat is scheduled for t.oday.
(INFORMATION ITEM)
Item 89 SWPS Underpinning Activities.
J.
Fisher reported that excavation of the SWPS east access shaft is almost comclete.
Installation of the lower bracing system is scheduled to begin in the near fbture.
(INFORMATION ITEM)
Item 89 SWPS Drawings.
J.
Fisher discussed the two SWPS drawings which have been marked up with a large number of corr 2r.ents.
The Assessrtent Team had previously expressed concern that these drawings were difficult to use because of the large nurtber of corrrr.ents. Mr. Fisher stated that these two drawi.ys will be revised this weekend to incorporate all of the coratents on the drawi.vs and then reissued for erection.
(INFORMATION ITEM)
New Iterrs Item 89 Weekly Report # 89.
The text of weekly report # 86 was reviewed. It was noted in the report that the revised methodology for incorporation of "one time deviations" FCRs has not been finalized. The Contractor had previously reported that
r Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan June 1, 1984 "one time deviations" FCRs will either be incorporated onto the applicable drawing directly or referenced on the drawing with a brief description of the FCR. 'Ihe Assessment Team will verify implementation of an incorporation methodology for "one time deviations" FCRs.
(OPEN ITEM)
Response Items No response items were discussed.
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-"eiie g' 1ENF Midland Site Resident Office Route 7, J.O. No. 14358 Midland, Michigan Ref. MPF 90 Attention: Mr. B. L.
Burgess DOCKET No. 50-339/330 MIDLAND PLANT UNITS 1 & 2 INDEPENDENT ASSESSMENT OF UNDERPINNING REPORT NO. 90 A copy of the Independent Assessment of Underpinning Weekly Report No. 90 for the period of June 3,1984 through June 9,1984 is enclosed with this letter. Included as attachments are the minutes of the daily meetings held during the week between members of the Assessment Team and Site Engineering, Construction, and Quality Assurance personnel.
If you have any questions with respect to this report please contact me at (617) 589-2067.
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Midl nd Pltnt Units 1 & 2 Independent Assessment of Underpinning Weekly Report No. 90 June 3, 1984 through June 9, 1984 Personnel on Site Stone & Webster Michigan, Inc.
P.
Majeski 6/7 - 6/9 D.
Benvie 6/4 - 6/9 D.
Zito 6/4 - 6/8 W.
Kilker 6/5 - 6/5 L.
Rouen 6/3 - 6/5 Parsons Brinckerhoff Michigan, Inc.
J.
Oliveira 6/6 - 6/9 B.
Metros 6/3 - 6/5 Meetings Attended Date Represented Purpose 5/29 - 6/1 Stone & Webster Daily Assessment Bechtel Team Meeting Consumers Power Parsons Underpinning and Remedial Soils - Construction E/W5 Grillages:
Installation of the leveling and bearing plate assemblies for the three jack locations at each grillage was completed. Fitup and welding of cross bracing is in progress.
Pier Kc8: Concrete placement for the pier was completed.
Pier E17:. Extension of the drift to permit enlargement of the pier is in progress.
Piers CT 3/10:
Placement of the pier shaft concrete was completed.
Pier Kc5:
Installation of the jacks and jackstands was completed.
Pier W17: No further activity was performed pending fabrication of lagging materials to support the enlarged shaft.
-East / West' Access Shafts: Excavation of zones Y/Z3 (to El. 591.5) was completed.
SWPS:
Installation of the upper level wales continued on the north and west side.
Excavation of the east access shaft was completed. The lower wale installation in the east access shaft began.
BWST:
Reinforcing steel, fortwork installation and concrete placement continued.
Cathodic Protection: Trench excavation and backfilling work continued.
Assessment Team Observations - Construction Installation of the E/W 5 grillage beams and the associated hardware continued this week. The Assessment Team observed welding of the transfer beats and dry-packing of one of the upper leveling plates for the grillages. Metal surfaces
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V J.O. No. 14358 Midland Plant Units.1 & 2 Independent Assessment of Underpinning were prepared and maintained dry prior to start of welding. The required preheat was attained and verified by the Contractor's welding engineer prior to start of welding. Le welding technique implemented including weld progression and placement of multiple weld layers confomed with applicable procedures. Upon completion of the weld, the required welder identification was inscribed at the weld location. A visual inspection of the welds was performed by the Contractor's welding engineer. Le inspection was thorough verifying that items such as weld length, throat measurement and cross sectional shape were in accordance with procedures. Prior to the start of drypacking for the upper leveling plate, the concrete surface was presoaked for 24 hrs. H e wooden forms were adequately sealed and braced to prevent any loss of drypack during installation. Stall workable quantities of grout were mixed with the appropriate amount of water ensuring proper bonding of the grout without any cvidence of excess water. Each grout lift was rarred with a tarping rod and harrer, ensuring thorough compaction of the leveling plate grout as it was placed.
The Assessment Team observed placement of concrete for piers Kc8 and CT 3/10.
Placement technique including lift height, lateral movement, free drop and concrete vibration conformed with good construction practice. A power failure occurred at the batch plant during concrete placement for pier Kc8, resulting in the formation of an unplanned construction joint. Be concrete surface for the joint was cleaned of all laitance and loose concrete'. Le surface was then roughened to achieve a suitable bond with the subsequent concrete lift. Additional reinforcing dowels and couplers were installed in accordance with the design requirements for unplanned construction joints. The Assessment Team concludes that the Contractor's actions associated with concrete placement for these piers was in accordance with good construction practice.
Assesstent Team Observation QA/QC The Assessment Team observed offsite concrete batch plant activities associated with batching of concrete for piers CT 3/10. The aggregate storage bins were clean, and the material stored in the bins were properly segregated and identified.
Aggregate samples for moisture content tests were retrieved from the accrocriate storage bins. Moisture testing of the aggregate was performed in accordance with ASIM procedures. A review of the calculations perfomed to determine the aggregate moisture content and the compensation toisture required to meet the batch design indicated that all computations were correct.
The Contractor has recently completed implementation of a computerized drawing register for design documents being used on site.
Previously, a manual register had been used for control and distribution of design documents. The primary advantage associated with use of the computerized register is that the register is continuously updated, providing the latest correct document status information.
In a recent FSO review of their controlled document no register errors were identified When the manual system was used, updating of documents status was slow and incidence of error was more frequent. An additional advantage associated with the cotputerized register is that the status infomation for a design document including revision number. attachtent infomation and distribution data has been consolidated into
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J,0, yo, ;g3gg Nudland Plant Units 1 & 2 Independent Assessment of Underpinning one source. Previously, distribution data was maintained separately.
Finally, knplementation of the computerized register has consolidated most of the Contractor and Vendor document data into one source, alleviating the need for multiple registers. Presently, one additional register is still required for revision and distribution data associated with vendors documents. The Assessment Team believes that implementation of the computer-ized register will enhance the Contractor's ability to maintain and control the construction documents, ensuring that the appropriate design require-ments specified are implemented properly.
Work Activity Packages The following Work Activity Packages (WAPs) overviews are in the open response stage or have been completed during the past week.
WAP No.
Title Status (0pened)(Closed) 46 Yard Area Permanent 6/5/64 Dewatering System 87 Install Upper Dowels 6/5/84 6/5/84 at E/W FIVP Slab Nonconformance Identification Reports NIR No.
Description Status (Opened)(Closed) 26 Closure of 5/25/84 Procedural Deficiencies Open Items Items discussed during the meetings are categorized as follows:
OPEN ITEM - An item for which an action is required. The itet will remain open yntil the required action has been taken. Tracking is required.
CLOSED ITEM - An item, usually brought forward by the Assessment Team that is discussed and adequately responded to.
No tracking is required.
-INFORMATION ITEM - An item brought forward to privide general background information regarding work, such as work status or an upcoming design change.
No tracking is required.
CLOSES ITD4 -XX-XX - This notation identifies an action that closes a previously identified open item. Tracking of the open item stofs.
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J.O. No. 14358 Midland Plant Units 1 & 2 Independent Assessment of Underpinning The following listing of all Open items from the Daily Meeting Notes with Bechtel and the text of the Weekly Reports.
Carry-over items from past weeks which have been Closed this week are also listed.
Item No.
Description Closure 71-17 Computerized Civil 90-18 Drawing Register 74-21 US Testing Corrective open Action 88-25 Documentation of 90-31 Buttress Access Shaft Spall Repair 89-7 Level C Wale Bearing Open Plate Gap 89-10 Access Shaft Soldier 90-19 Piles 89-31 Retirement of "One Open Time Deviation" FCRs 90-6 SWPS Duct Bank Cracks Open 90-7 Upper Leveling and Open Bearing Plate Assembly Welds 90-9 BWST Ring Beam Addition Open in Valve Pit 90-35 Concrete Aggregate open Testing g
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.Not s of Daily Meeting' Independent Assessment of Underpinning-Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site-Midland, Michigan June 4, 1984 Present For:
Consumers Power Bechtel MPOAD Stone & Webster G.
Marray J.
Fisher R.
Sevo W.
Kilker E.
Cviki J.
McMaster D.
Benvie J.
Kelleher D.
Zito L.
Rouen Parsons Brinckerhoff B.
Metros PURP'OSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items
' Item 90 Auxiliary Building Underpinning Activities Placement of the first lift of concrete for the CT 3/10 pier shafts was completed.
Excavation of the Y/Z3 zones (to El. 591.5) in the access shafts was completed.
Installation of the transfer beams at all 3 Jack locations was completed for.the E/W5 grillages.
.(INFORMATION ITEM)
Item 90 Computerized Cvil Drawing Register.
J.
Fisher stated that the computerized civil drawing register has been corrpletely htplemented. All Contractor and Subcontractor drawings have been incorporated into the computerized drawing register. As a result, use of the tranual register has been discontinued.
FSO will provide the Assessment Team access to a copy of the register. (Item 71-17 remains OPEN)
(INFORMATION ITEM)
Item 90 Auxiliary Building Access Shaft Soldier Piles.
J.
Fisher reported that the FCR describing remedial action for extension of the two short soldier piles in each access shaft to the top of the buttress access shaft footing has been issued.
(Item 89-10 remains OPEN) (INFORMATION ITEM)
New Items
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v Note] of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power' Cerr.pany
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Held at Midland Site Midland, Michigan June 4, 1984 h
Item 90 4 - US Testing Requirements for Concrete Testing.
With respect to an NCR aritten against the testing of sand at the concrete batch plant,L.
Rouen asked if Bechtel is responsible for directing the concrete testing activities of US Testing.
J.
Fisher responded that concrete testing activities of US Testing are gnerned by the engineering specification for concrete placemeat and testiag. The type, nu:r.ber and timing of the tests are dictated by the specifications, not Bechtel field supervision. Bechtel. field supervision rrij request additional tests as needed, but US Testing must meet testite requirements contained in the appropriate specifications an a trinimum.
(CLOSED ITEM)
Item 90_5_ - Concrete Testing NCR.
With respect Ac an NCR written because a concrete air entrainment test was taken at the improper loccation, L.
Rouen asked for details on the MPQAD activity at the time.
J.
McMaster replied that the QC inspector was overviewing the US Testing effort. The inspector, djd consult the applicable specifications but did not irr2r.ediately locate the riference to location of testing., Subsequently, it was ver;.fied dat the test should have been taken at the placement location, not at trte trrk discharge.
(NIR # 26 remains OPEN)
(CLOSED ITEM)'
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tyi Item 90-62. SW N > Cont Bank Cracks. (
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Cvikl rvparte1'that cracks had been$ found in the most easterly duct bank neartheSWPSnpchswall. lThe crack corisgMant, CTLi will be reviewing the cracks.
D.
Bep71e requested that the Asse.ssment Team be provided with a copy of the CTL sumary report once it ls issued.
E.
Cviki will respond.
(OPEN ITEM)
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I-Item 90-7 I dgrei Ideling and Betring1 Plate Assembly Welds.
.. t B.
Metros asked WryLche smaller weld eccently approved for use on the upper leveling and bearing' plate aisemblies is not being used.
J.
Fisher will respond.
(OPEN 1 3f)
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Continge]ncyIiJacking.
Item 90,
.i R.
Sevo asked which procedtr'e will be used if contingency jacking is required due to differential movertent at the Contrcl Tower / Turbine Building interface.
J.
Fisher responded' that if differential movement between these structures exceeds 0.5 in, the Subcontractor's prtceW for pier jacking will be implemented.
(CLOSED ITEM)'
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Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan June 4, 1984 Item 90 BWST Ring Beam Additions at the Valve Pit.
D.
Zito discussed the portion of the ring beam addition inside both of the BWST valve pits. Mr.
Zito asked what construction techniques will be used to allow concrete vibrator access and to assure there are no gaps where the top of the ring beam addition will interface with the extisting valve pit roof slab.
J.
Fisher will respond.
(OPEN ITEM)
Item 90 E5 Grillage Bearing Plate Smoothness NCR.
W.
Kilker asked for a clarification on the nonconforming condition and disposition on an NCR written against the surface condition of two bearing plates at a E5 grillage beam jacking location. The NCR appeared to contain less specific information on the non-conforming condition than is normally presented and the disposition was such that the need for a smoothness criteria was left in-doubt.
E.
Cvikl will verify the details of the resolution of this NCR and respond.* (OPEN ITEM)
Response Items
.No response items were discussed.
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V Not:3 cf.,DEily Meeting Independent Assessment of Underpinning s'
Midland Plant, Units 1 & 2'
' Consumers Power Company Held at Midland Site 3
Midland, Michigan June 5, 1984~
.g Present For:
Consumers Power Bechtel MPQAD' Stone & Webster G.
Marray
.J.
Fisher R.
Sevo W.
Kilker J.
Schaub E.
Cviki J.
McMaster D.
Benvie J.
Kelleher D.
Zito L.
Rouen Parsons Brinckerhoff B.
Metros
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PURPOSE This meeting is held each day to discuss items regarding the' Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 90 Auxiliary Building Underpinning Activities.
Reinforcing steel installation was cenpleted for pier Kc8.
Drypacking of the upper leveling plate for the X jack location was completed at the E5 grillage.
Placement of the last lift of concrete for the CT 3/10 piers is scheduled for tomorrow.
3 (INFORMATION ITEM)
Item 90 SWPS Underpinning Activities.
J.
Fisher reported that installation of the lower level wale in the vicinity of the SWPS northeast corner is scheduled to begin tesrrow.
(INFORMATION ITEM).
Item 90 Incorporati6n of "One Time De"'"
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Kelleher discussed incorporation of "o:.?
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'This work is being accomplished in accordan'ce with administrative guidelines.
Field and project engineering documents co::hrol procedures are presently being updated to provide guidelines for incorporating this type of FCR in the fbture.
These updated procedures will contain the criteria for determining whether an FCR will be incorporated directly onto the drawing or incorporated by reference with a brief description.
(Item 89 remains OPEN) (INFORMATION ITE"i m.
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-June 5, 1984 Item 90-14 Ring Beam Addition in Valve Pit.
J.
Fisher discussed the original planned method of concrete placement for the portion of the ring beam addition inside the valve pit at each BWST.
After placing concrete in the bottom portion of the beam addition, the Contractor planned to grout the remaining portion through holes drilled in the valve pit roof slab, but Engineering did not approve the use of the grout.
As a result, the' Contractor is evaluating alternate placement methods.
(Item 90-9 re: rains OPEN)
(INFORMATION ITEM)
Item 90 SWPS Duct Bank Cracks.
E.
Cvikl reported that the crack consultant, CTL,will begin their evaluation of the duct bank crack at the SWPS north wall. Their preliminary investigation does not indicate that the crack resulted from differential settlement between the SWPS and the duct bank. The actual cause is still under invest-igation.
(Item 90-6 remains OPEN)
(INFORMAITON ITEM)
New Items Item 90 UAT lateral Wellpoints.
J.
Fisher reported that water level readings taken at piezometer BB-2 indicate that the perched groundwater level beneath the control tower is remaining stable at El. 584 '*.
As a result, use of the UAT lateral wellpoints has been discontinued.
(INFORMATION ITEM)
Response Item Item 90 E5 Grillage Bearing Plate Smoothness NCR.
E.
Cvikl responded to the Assessment Team question concerning clarification of an NCR written against the surface condition of two bearing plates at the E5 grillages. Mr.
Cvikl stated that Resident Engineering had performed a visual inspection of the plates prior to dispositioning the NCR.
'Ihe visual inspection determined that although the smoothness criteria for the bearing surfaces had not been met, the actual surface condition was capable of satisfying the loading requirements. The NCR disposition will be revised to reflect results -
of the visual inspection perfonr.ed by Resident Engineering.
(CLOSES-ITEM 90-10)
Item 90 Computerized Civil Drawing Register.
'Ihe Assessment Team has completed a review of the computerized drawing register which is being implemented for control and maintenance of Contractor and Sub-contractor drawings. The register infor: ration for Contractor drawings includes drawing number, title, revision number, attachment information and distribution schedules.
This same infomation for vendor drawings with the exception of
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Note;ofDailyMeeti(ll fund,rpinning Ind: pendent Asse sment o Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan June 5,1984 distribution data is contained on the register.
Central Document Control updates the register on a daily basis ensuring that the latest document data is available. The Assessment Team believes that implementation of the computerized register will serve as a useful tool for control and traintenance of the controlled documents on site. Implementation of this system site wide will ensure a core uniform approach for controlling distribution and maintaining construe:.on drawings.
(CLOSES ITEM 71-17)
Item 90 Auxiliary Building Access Shaft Soldier Piles.
The Assessment Team has reviewed the FCR which contains the redesign for extension of the two short soldier piles in each access shaft. The piles will be extended to the top of the buttress access shaft footing by welding a wide flange section to the front of the existing soldier piles as required.
Once the wide flange sections have been added, lagging and backpacking will be installed in accordance with the design requirements.
The Assessment Team concurs with the remedial action takca to extend the soldier piles.
(CLOSES ITEM 89-10)
c NotesofDailyMeetslll I.
Independ:nt Assessment of Und:rpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan June 6, 1984 Present For:
Consumers Power Bechtel MPQAD Stone & Webster G.
Marray J.
Fisher R.
Sevo D.
Benvie E.
Cvikl J.
McMaster D.
Zito J.
Kolleher Parsons Brinckerhoff J.
Oliveira PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 90 Auxiliary Building Underpinning Activities.
Extension of the two short soldier piles in the west access chaft to the top of the buttress access shaft footing has begun.
Regrouting of the Kc5 upper leveling p1'te was completed.
Placement of the pier Kc8 concrete is scheduled for today.
(INFORMATION ITEM)
Item 90 BWST Ring Beam Addition in Valve Pit.
J.
Fisher discussed proposed methods which are being evaluated to place concrete for the portion of the ring beam addition within the valve pit at each BWST. The Contractor has proposed that a pea gravel concrete mix be used to ease placement in this confined area of the ring beam addition.
Another modification being considered includes drilling additional holes in the valve pit roof slab to increase access for the concrete vibrators into the placement area.
(Item 90-9 remains OPEN) (INFORMATION ITEM)
New Items Item 90 Diesel Generator Building Crack Evaluation.
G.
Murray reported that a supplemental engineering survey requested by the NRC staff to evaluate cracking in the diesel generator building will begin in the near future.
(INFORMATION ITEM)
Item 90 Excavation Slopes for the Unit 2 HVAC Foundation Pad!
D.
Benvie discussed the excavation for the Unit 2 HVAC foundation pad. One of the excavation slopes had been excavated at or near vertical for its entire height of 8 to 10 ft. It was noted that the underpinning subcontractors crane operating within 5 ft. of the top of the vertical slope may be adding sur-charge loading to the soil which could cause soil sloughing and possibly
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Note] of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan June 6, 1984
' darage the installed duct line and concrete formwork. Additionally, partial-undermining 'of the vertical soil slope and the proximity of the duct bank to the slope will prevent proper cm.paction of the backfill during placement.
Mr. Benvie asked the Contractor to evaluate these conditions.
J.
Fisher will respond.
(OPEN ITEM)
Item 90 MPQAD Staffing for Underpinning.
.J.
Oliveira noted that the Assessment Team had learned from Bechtel and MPQAD that the attrition rate for Remedial Soils QA/QC staff has increased. Mr.
Oliveira asked if consideration is being given to consolidating QC hold points in response to the decreased staffing levels.
It was stated that there are no plans to consolidate QC hold points. MPQAD is in the process of reassigning and training MPQAD Balance of Plant personnel to replace Remedial Soils QA/QC inspectcrs who have left. Additionally, Bechtel is evaluating the schedule for underpinning work activities in order to minimize possible impact.
(CLOSED ITEM)
Item 90 Installation of Contingency Jacks.
J.
Fisher reported that installation of contingency jacks at the interface of the turbine building and control tower is scheduled to begin within the next week. Then jacks will only be used if differential settlement between the control tower and turbine building exceeds 0.5 in.
(INFORMATION ITEM) t Response Items No response items were addressed.
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Ind: pendent Assesst.
of Und;rpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan Nne 7, 1984 Present For:
Consumers Power Bechtel MPQAD Stone & Webster G.
Murray J.
Fisher R.
Sevo D.
Benvie E.
Cvikl J.
McMaster D.
Zito J.
Kelleher Parsons Brinckerhoff None PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 90 Auxiliary Building Underpinning Activities.
Placement of concrete for pier Kc8 began yesterday.
Due to a power outage, concrete placement wac only completed to El. 592.75. As a result a cold-joint was formed for the pier shaft. The remaining concrete will be placed totorrow.
Grouting of all 3 upper leveling plates at each of the E/W5 grillages was completed.
Load transfer for Kc5 is scheduled for tomorrow.
(INFORMATION ITEM)
Item 90 SWPS Underpinning Activities.
J.
Fisher reported that installation of the lower level bracing at the northeast corner of the SWPS has begun.
(INFORMATION ITEM)
Item 90 SWPS Duct Bank Cracks.
J.
Fisher reported that a conditional release had been issued to allow chipping of the duct bank concrete in the area of the cracks.
The chipping is being done to allow an evaluation of the cracks.
It is also planned to excavate in a localized area beneath the duct bank /SWPS north wall interface to provide additional information.
(Item 90-6 remains OPEN)
(INFORMATION ITEM)
New Items Item 90 Weekly Report # 89.
The text of Weekly Report # 89 was reviewed.
It was determined that all open items had been previously identified.
(INFORMATION ITEM)
y Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan June 7, 1984 Response Items Item 90 Excavation Slopes for the Unit 2 HVAC Foundation Pad.
J.
Fisher responded to the Assessment Team question concerning vertical soil-slopes for the HVAC foundation pad excavation. Access of the under-pinning subcontractors' crane to the excavation slopes has been restricted in order to prevent surcharge loading of the soil. Le slope will be layed back and braced as needed to ensure its' stability. Undermined areas will be removed during layback of the slope to provide access for compact-ion equiptent during backfilling. The Assessment Team concurs with this course of action.
(CLOSES ITEM 90-23)
Item 90 Documenetation of Buttress Access Shaft Spall Repair.
E.
Cviki responded to the Assessment Team question concerning documenta-tion of the Safety Concern Evaluation Report (SCER) content associated with concrete spalling on the Buttress Access Shaft wall. he SCER re-quired that the torque of the rockbolts for the Level C bearing plate closest to the spall area be verified and the concrete within the spalled area be removed. Since this structure is non Q, M?QAD documentation is not required. However, a field engineers report was prepared to document the results of the rock bolt load verification.
In addition, a concrete drill permit was prepared to allow removal of the concrete in the spalled area. Le field engineer's report and the concrete drill permit have been attached to the SCER as permanent documentation of the work. he Assessment Team believes that the SCER content and reconrendations have been adequately documented. (CLCSES ITEM 88-25)
r Noter of Daily Mesti Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan June 8, 1984 Present For:
Consumers Power Bechtel MPQAD Stone & Webster G.
Murray J.
Fisher R.
Sevo D.
Benvie R.
Wheeler E.
Cvikl J.
McMaster D.
Zito J.
Kelleher P.
Majeski Parsons Brinckerhoff J.
Oliveira PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 90 Auxiliary Building Underpinning Activities.
Concrete placement was completed for piers CT 3/10.
Installation of jacks and jackstands was completed for pier Kc5.
(INFORMATION ITEM)
New Items Item 90 SWPS Phase II Cofferdam Subgrade.
D.
Benvie discussed excavation of the SWPS Phase II cofferdam.
It was noted that if over-excavation is required below design subgrade for the pipe bedding, additional bracing and/or layback of the excavation slopes will be required.
Mr.
Benvie asked if a visual inspection of the soldier pile sheeted pit excav-ations is planned in order to make a preliminary evaluation as to the accept-ability of the subgrade at this elevation.
E.
Cvikl responded that there is no formal requirements to inspect the sheeted pit excavations. However, visual examination of the sheeted pits will be performed to assist Resident Engineering in their evaluation of the pipe bedding subgrade for acceptability.
(CLOSED ITEM)
Item 90 MPQAD Organization Chart.
J.
Oliveira requested a copy of the MPQAD organization chart showing a schedule breakdown with staffing level for the work shifts.
J.
McMaster will respond.
(OPEN ITEM)
Not;sofDailyMeell)g i
i Ind:: pendent A~seisment of Und:rpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Elchigan June 8, 1984 Item 90 Concrete Aggregate Testing.
P.
Majeski asked what concrete aggregate testing data is required prior to batching of concrete.
J.
Kelleher responded that the aggregate tositure content data is required to determine proportions of the concrete batch tix.
It was noted that the tositure content data sheet for concrete batched on 5/28/84 which was placed for the CT 3/10 pier bells had not been signed off prior to concrete batching.
Mr.
Majeski asked MPQAD to determine if the moisture test results had been adequately reviewed prior to concrete batching.
J.
H2 Master will respond.
(OPEN ITEM)
Response Itets No response items were addressed.
-