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STONE & WEBSTER MICHIGAN. INC.
P.O. Box 2325. Boston. MASSACHusms 02107 l
United States Nuclear Regulatory Commission July 13, 1983 Midland Site Resident inspectivn Office i
Route 7 J. O. 14358 Midland, MI. 48640 Ref. MPF 42 Attention: Mr. R. Cook RE: DOCKET NO. 50 - 329/330 MIDLAND PLANT - Units 1 & 2 INDEPENDENT ASSESSMENT OF UNDERPINNING REPORT NO. 42 A copy of the Independent Assessment of Underpinning, Weekly Report No. 42 for the period of July 3, 1983 through July 9, 1983 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.
Very truly yours, U.h 4)CK y
A. Stanley Lucks Project Manager i
Enclosures I
ASL/pd 8406130060 840517 PDR FOIA ppg RICEg4-96
..e J. O. No. 14358 Midland Plant Units 1 & 2 i
f Independent Assessment of Underpinning I
Weekly Report No. 42 I
July 3, 1983 through July 9, 1983 Personnel on Site Stone & Webster Michigan, Inc.
i W. Kilker 7/5 - 7/9 B. Helsinger 7/5 - 7/9 A. Scott 7/4 - 7/8 f
Parsons, Brinckerhoff Michigan, Inc.
i v..Madill 7/5 - 7/8 Meetings Attended t
Date Represented Purpose 7/5 -7/8 Stone & Webster Daily Meeting Bechtel Consumers Power l
Parsons ( 7/6 -7/8 )
I 7/7 Beentel Weekly Engineering Consumers Power and Construction l
Stone & Webster Coordination Work Session 7/7 Stone & Webster Weekly MPQAD Meeting Consumers Power (MPQAD)
Activities Construction:
Pier E8: The installation of the upper leveling plates began. However, several turbine sat reinforcing bars were cut during the removal of Hilti bolts that were no longer required. Work was halted pending the resolution of the re-bar nonconformance.
Pier E8 N-S Bulkhese The excavation of the drift and installation of drift supports continued to approximately 60 percent of completion. Progress was slowed by Hilti-bolt. installation problems.
Pier E10: The pier remained on active jacking throughout the week.
Pier KC11: Load transfer was completed and the pier was wedged-off. Routine rejacking was performed as required.
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J. O. No 14358 Midland Plant Units 1 & 2 Independent Assessment of Underpinning Weekly Report No. 42 i
Pier W8: The progress and status was similiar to that des:ribed above for pier ES.
3 Pier W8 N-S Bulkhead: The excavation of the drift and ins allation of drift sup.
ports continued to approximately 90 percent completion. Early in thi week the need i
to resolve a nonconformance on drift support plate Hilti-bolts resulted in a 1 1/2 day delay.
SWPS: The installation of interior wells and the brackets, instrumentation and protective covers for the benchmarks continued as did the excavation and support I
of sheeted pits for probing. Three soldier piles were installed and grouted in-place. Work on the exterior wells along the east side of tue? structure was halted pending resolution of the installation methodolgy. Based en the experience at two of the wells a codihcation to the existing procedure may te requireJ co eli'ninate I
problems with hole caving.
I In addition, the drillinc of another well was inadvertently started at the location of a survey stake installed to designate a buried obstacle. At a depth of approx.
i imately 13 ft.
the Engineer noted a loss of drilling fluid and change of wash material to a gravel. We work was quickly halted and the location error discov-w r.ed.
BSWT The drilling of the connector holes was completed. Sandblasting and fabrica-tion of reinforcement continued.
Cuality Control, Documentation and Records:
1.
Reviewed the J. A. actions and prior Inspection Reports following the issuance of a nonconformance report on the control weld rods.
2.
Reviewed the circumstances surrounding theissuance of an NCR on the thread on-gegement length for certain Hilti-boltr on the W8 N-S bulkhead.
3 Reviewed the project specification, procedures and PQCI relative to the instal-lation of the grillage teams.
4 Reviewed the concrete placement Inspection Reports for 1/W3 piers.
5.
Witnessed the QC verification of Hilti-bolt torque testing, thread engagement and bolt perpendicularity.
Observations l
Construction 3 Activity on the auxiliary bui din w
arthy the nonconform-ance problems ass lated with Hilti-bolts.
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N9f.;;th ra e receiut M oele me AssessmJnt h asy:
1 e cu Team feels it is imperative that the construction and enginetring groups take the actions appropriate to substantially reduce the delay times resulting from these anchor bolt nonconformances. The bulkhead installation completion and load trans-fers at pier E/W8 are significant activities in terms of structural support and advancement of the underpinning project.
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J. O. No 14358 Hidland Plant Unita 1 & 2 Independent Assessment of Underpinning Weekly Report No.42 The Assessment Team also believes that the Contractor should have been more cognizant of the turbine sat reinforcing bar cutting during the bolt removal op-eration particularly in the E8 pier area. In addition, a greater awareness by the field personnel of the procedural requirements for Hilti-bolt engagement lengths could have helped prevent the occurrence of the nonconforming conditions.
On the SWPS exterior well installations, the Assessment Team feels the Contractor took a prudent and coriservative approach in halting the drilling of the wells i
along the east side of the structure, pending a review of the installation methods.
With respect to the incorrect drilling location for one of the other wells, it is l
obvicut the Contractor's field engineers must improve their awareness of the evk-ings of the different location stakes in the area. However. the Engineer assigned i
to monitor the advancement of the hole demonstrated good judgment in stopping the work when changed drilling conditions were noted.
Cuality control, Documentation and Records:
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1.
MPQAD has a total of thirty inspection reports on weld rod control. These in-j spections contain an at. tribute which can be used to detect any situations similiar to the referenced wel1 red centrol nonconformance. The thirty inspections cover a period from 12-82 thru the week of 7-5-83 1he inspection reports cover almost l
all weld areas randomly throughout the period. The Assessment Tess believes that these reports can provide sufficient confidence that the weld red control situation is t.ot a recurring problem and support MPQAD's justification not increasing the in-spection frequency.
2.
The NCR on Hilti-bolt engagement length was issued because the specified con-ditions for thread run-out had not been satisfied. The project specification and l
"ubcontractor installation procedure apocified the use of manufacturer's published i
thread length. Contrary to the specification requirement, the actual thread lengths of the bolts were used. The Field Engineers had measured the actual lengths in the l
presence of the QC inspector. However, this action is no justification for not having a nonconforming condition to the project procedures. Therefore, the Assess.
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ment Teat agrees with the issuance of the NCR against the project documents.
3.
As a result of the review of project requirements for the grillage beam instal-l lation, the Assessment Team submitted twelve question / comments to MfQtD for reso-lution. Further evaluation may be necessary pending HPQAD's response.
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4.
The Inspection Reports (irs) fer the E/W8 pier concrete placements were incon-j piste in that the irs are held open until all test data (i.e, 28 day compressive strengths) is submitted by U.S. Testing. It was noted that several of the irs did not have the curing attribute sign-off. However, the completed curing record was attached. In addition, several irs did not have the surface defect attribute signed-off but these were for placements below the hammerhead which would not re.
quire this inspection. MPCAD/QC was cautioned about the need to complete applicable portions of the irs in a more timely manner.
5.
The inspection of Hilti Bolts in the west side N/S bulkhead for one of the drift sets was conducted correctly using the proper inspection tools.
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l Midland Plant Units 1 & 2 Independent Assessment of Underpinning Weekly Report No. 42 l
Nonconformance Identifiestion Report WIR No.
Description Date 12 NCR Reviewed for Reportability (0pened) (Closed) i under 10 CFR 50.55 (e) part 21.
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Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant Units 1 & 2 Consumers Pue: Company Held at Midland Site Location Midland, Michigan July 4, 1983 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 Location Midland, Michigan
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July 5, 1983 l
Present For:
Consumers Power Bechtel MPQAD Stone & Webster i
G. Murray D. Lavelle R. Sevo A. B. Scott j
M. Blendy i
J. Gaydos i
J. Kelleher Parsons j
P. Himmelberger None i
j Purpose l
This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
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Discussion Item 1 - Carlson Meters.
D. Lavelle 17 going to provide the Assessment Team with a status of the testing of the Carlson Meters already encased in concrete. Approval of the changes to f
the WJE Procedure OP hM is scheduled for July 15, 1983 Item 2 - Grout Test.
M. Blendy will have a report prepared by July 8, 1983 concerning the grout test made at the Poseyville yard and will address the results of the-pressure grouted plates and the two plates drypacked.
Items Requiring Resolution.
None
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Notes of Daily Meeting Independent Assessment of Underpinning Midland Pla'nts Units 1 & 2 Consumers Power Company
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Held at Midland Site Location Midland, Michigan July 6, 1983 i
Present For:
Consumers Power Bechtel MPQAD Stone & Webster 1
G. Murray J. Fisher R. Sevo A. Scott 3
D. Lavelle W. Kilker D. Himmelberger B. Holsinger J. Gaydos E. Cviki Parsons
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V. Madill i
Purpose I
This meeting is held each day to discuss items regarding the Independent Soils Assessment at ths Midland Plant, Units 1 & 2.
Discussion
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Item 1 - SWPS Soldier Pile Hole Pre-drilling.
D. Lavelle reported that bentonite.will be used to stabilize the drill holes t
with casing on-hand in esse it is required.
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- Item 2 - NCR on Hilti-Bolt Thread Engagement.
D. Himmelberger reported that on the W8 N-S bulkhead soldier beams an NCR was written by the second shift QC inspector after an initial acceptance by the first shift inspector. The point of contention was the initial inspection used the actual measurement of the thread length to assure engagement. The follow-up inspection referenced the project documents which stipulate manufacturers published length to assure engagement. Engineering must resolve before the bulkhead work can continue.
- Item 3 -. Coring of Abandoned Hilti-Bolts.
There was a discussion of the need to core-out abandoned anchor bolts for the underpinning work. To date the requirement has been established through a balance -
of-plant specification directed mainly at pipe hangers.
A. Scott questioned if the " red-head " bolts that have been encountered upon removal of the concrete mud-mats under the structural mat will also require removal.
Item 4 - QC re-inspection of Instrumentation System.
R. Sevo reported the re-inspection is virtually complete and that the plan is to issue 2 or 3 multifaceted NCR's.
- Item 5 - Wedging of Lagging on N-S Bulkhead Excavation.
V. Madill questioned if the driving of 4 inch wide wedges between the steel '
soldier colums.and the,12 inch wide wood lagging boards reduced the: effectiveness bb e
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Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant Units 1 & 2 Consumers Power Company Held at Midland Site Location Midland, Michigan July 6, 1983 1
of the lagging since the bearing area was in effect reduced.
E. Cviki will respond.
l Items Requiring Resolution.
Items requiring resolution are indicated by an *.
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', Notes o.f Daily Meeting Independent Assessment of Underpinning Midland Plant Units 1 & 2 Consumers Power Conpany l
Held at Midland Site Location Midland, Michigan July 7, 1983 Present For:
i Consumers Power Bechtel MPQAD Stone & Webster l
G. Murray J. Fisher R. Sevp-A. Scott
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Lavelle B. Helsinger E. Cviki J. Gaydos Parsons D. Himmelberger V. Madill Part time
- I Purpose This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
Discussion Item 1 - Concrete Mixer Uniformity Test.
i-J. Gaydos advised the Assessment Team that the Concrete Mixer Uniformity Test will be preformed at the vendor's batch plant on July 8, 1983 Item 2 - Receipt Inspections of NPS fabricated items.
R. Sevo advised that QC aid not relinquish their requirement to-inspect all incoming materials for damage during shipment'or for workmenship on the material even though source inspection has been performed.
- Item 3 - Interpretation of Note on Drawing.
A. B. Scott requested'an interpretation of Note No. 3 on Drawing 7220-C-1434-1 Rev. 3 which reads in part " Once started, work shall proceed continuously ".
Due to field problems there has been no work performed on the west side N/S bulkhead in the past forty four hours.
.D. Lavelle will.have an interpretation on July 8, 1983 Items Requiring Resolution.
Items requiring resolution indicated by an '.
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2 Notes of Daily Meeting Independent Assessment of Underpinning Midland Power Company Consumers Power Company Held at Midland Site Location Midland, Michigan July 8, 1983
- Item 7 - Removal of QC Hold Tags.
W. Kilker asked for a clarification on the steps taken to resolve the NCR on the WS N-S bulkhead Hiltibolt engagement lengths. FSO will provide an explana-i tion.
Item 8 - Use of Wedges on N-S Bulkheads.
"In response to an earlier question by V. Madill, E. Cviki reported that a drawing note will be added to clarify the responsibility of the RGE in designating the need for lagging wedges.
Item 9 - Lagging Requirements in Full-face Concrete Areas on N-S Bulkheads.
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E. Cviki reported that in these areas an FCR is being considered to eliminate the need for lagging in these areas.
Item 10 - Need for Removal of Redhead-Type Anchor Supports.
In response to an earlier question by A. Scott, J. Fisher reported that it has been determined there is no need to remove this type of mat protrusion.
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Item 11 - Definition of Continuous Work on N-S Bulkheads.
I G. Murray reported there is a drawing FCR that defines what is meant by "continu-ous " work on the N-S bulkheads.
Items Requiring Resolution.
i Items requiring resolution indicated by an *.
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m Notes of MPQAD Meeting Independent Assessment of Underpinning Midland Plant Units 1 & 2 I
Held at Midland Site Location Midland, Michigan July 7, 1983 Present For:
Stone & Webster MPQAD A. Scott J. Meisenheimer W. Kilker R. Oliver A
B. Holsinger M. DeWitt D. Horn Purpose 3
This meeting is held each week to obtain information from MPQAD regarding the Soils Underpinning Work at the Midland Plant Units 1 & 2.
i Discussion I
Item 1 - Status of NIR # 12.
J. Meisenheimer stated there is essentially no change. The proposed NCR i
procedure is being reviewed and the QAR Procedure needs to te revised in conjunction with the new NCR procedure to allow for Q. A. generated non-conformances.
Item 2 - Status of PQCI Revisions Concerning Concrete Vibrators.
PQCI has been issued and verified by the Assessment Team. This closes Item
- 5 from week of June 14, 1983 Item 3 - Receipt Inspection of Materials From N.P.S.
J. Meisenheimer clearly stated,' in response to comments made by FSO in the Daily Assessment Meeting of 7-6-83, that normal receipt inspections will be performed. During the course of a normal receipt. inspection when conditions adverse to. quaIityare detected outside of the scope of the normal inspection it is site practice to resolve.the status of the noted conditicn(s) prior to accepting the shipment.
This situation occurred for shop inspected items from N.P.S. 'when the Q.C.
"eceiving requested assistance from MPQLD Soils which resulted in rejecting some weldsson the grillage beams.
B. Holsinger commented that the Assessment Team would have a concern only if this stated practice was not being followed.
Item 4 -Status of BWST Reinforcing Steel.
R. Oliver stated that fabricated rebar for Unit #-2 is approximately 50-60%
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' complete with no nonconforming conditions noted. There are some Q. A. concerns with the Unit # 1 rebar. such as heat numbers on paper tags rather than nondestrut--
able tags to avoid loss of identification from shop to installation and.on unsatisfactory storage conditions. Until the Q. A. concerns are alleviated no
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- estimate can be made for Unit # 1 rebar completion.
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2 Notes of MPQAD Meeting Independent Assess =ent of Underpinning Midland Plant Units 1 & 2 Held at Midland Site Location Midland, Michigan July 7, 1983 M. DeWitt stated there are now three inspectors assigned to this rebar shop in Lansing.
Item 5 - Status of Instrumentation Reinspection.
J. Meisenheimer clarified a statement reported in Item 2 of Assessment Team /
MPQAD. weekly meeting dated June 28,.1983 The MPQAD re-inspection of open IPIN items is essentially complete. MPQAD
- l will reinspect the remainder of the Instrumentation System Conduit Installation I
which had not been previously been over-inspected by MPQAD/QA.
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' Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant Units 1 & 2 Consumers Power Company I
Held at Midland Site Location Mddland, Michigan July 8, 1983 Present For:
j Censumers Power Bechtel MPQAD Stone & Webster G. Murray J. Fisher R. Sevo A. Scott E. Cviki B. Holsinger W. Kilker Parsons i
V. Madill f
~ l Purpose f
- l This meeting is held each day to discuss items regarding the Independent l
Soils Assessment at the Midland Plant, Units 1 & 2.
Discussion Item 1 - Update on N-S Bulkhead Excavation.
J. Fisher reported that the WB N-S bulkhead is nearing completion. Excavation of zone areas under the structure and lowering of the access shaft will com-mence once the bulkhead is in-place.
i Item 2 - SWPS Soldier Pile Installation.
I J. Fisher reported the second soldier pile installation was completed in 1 day, Item 3 - SWPS Dewatering Well Status.
J. Fisher said problems were encountered in maintaining the holes in certain of the exterior well drill holes. SWP has been asked to address the problem.
Item 4 - Proposed Concrete Mix Design.
E. Cviki reported that all field comments have not yet been resolved.
Item 5 - Extent of. Inspection. Sign-offs for Pier Installations.
There was a discussion of the extensive sign-off requirements ( reportedly several~
hundred signaturesrequired to allow the installation of a single pier). FSO intends to initiate an effort to see if this number can be substantially reduced while still satisfying quality requirements.
Item 6 -~ Elimination of " Inactive " Drift Set Lagging.
A. Scott observed that 2 or 3 weeks ago' there was a field inspection by engineer- -
ing to determine if certain in-place lagging could be removed where it no longer required to support soil. To date there has been no apparent action.
J.. Fisher-and E. Cviki will address.
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STONE & WEBSTER MICHIGAN, INC.
MIDLAND NONCONFORMANCE IDENTIFICATION REPORT j
DATE OF NONCONFORMANCE:
T-13-83 NIR Number il IDENTIFICATION / LOCATION OFITEMS:
Drift Sets, Soec C305. PQCI UP-C-1.016.
AAPD/ PSP G-6.1 DESCRIPT10N OF NONCONFORMANCE: Contrary to Proieet Procedures the POCT for Hilti Bolt inntallatinn dn. nn*,.nnesin on
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7.g the specification recuired accentance criterin enn n1.nnnnn.
h.*u..n base plates and concrete surfaces.
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i INITIATOR:
DATE:
PROJECT MANAGEMENT CONCURRENCE:
l.dE.[ Mfd 3 T-14-83 CORRECTIVE ACTION SY:
MPQAD 3
(IDENTIFY ORGANIZATION TAKING CORRECTIVE ACTION)
INITIATOR CONCURRENCE:
PROJECT MANAGEMENT CONCURRENCE:
DATE:
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STONE & WEBSTER MICHIGAN, INC.
P.O. box 2325. BOSTON. massachusetts 02107 l
United States Nuclear Regulatory Commision July 7, 1983 Midland Site Resident Inspection Office l
Route 7 J. O. No. 14358 Midland, MI.
48640 Ref. MPF 41 Attention Mr. R. Co'k o
RE: DOCKET No. 50- 329/330 MIDLAND PLANT-UNITS 1 & 2 INDEPENDENT ASSESSMENT OF UNDERPINNING f
REPORT NO. 41 i
A copy of the Independent Assessment of Underpinning, Weekly Report No.
41 for the period of June 26,1983 through July 2, 1983 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.
Very truly yours, N
[3 Lb A. Stanley Lucks Project Manager Enclosures ASL/pd I
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t J. O. No. 14358 Midland Plant j
Units 1 & 2 l
Independent Assessment of Underpinning Weekly Report No 41 June 26,1983 through July 2, 1983 Personnel on Site Stone & Webster Michigan, Inc.
j W. Kilker 6/27 - 6/29 P. Barry 6/26 - 6/30 L. Rouen 6/27 - 7/ 1 P. Majeski 6/27 - 7/ 2 A. Lucks 6/30 Parsons,Brinckerhoff Michigan, Inc.
W. Parish 6/28 - 7/ 1 Meetings Attended i
Date Represented Purpose i
6/27 - 7/1 Stone & Webster Daily Meeting j
Bechtel Consumers Power Parsons ( 6/29 - 7/1) 6/27 Bechtel Road Map Meeting Consumers Power for Mass Mergentime Excavation Stone & Webster 6/30 Bechtel W ekly Engineering e
Consumers Power and Construction Stone & Webster
. Coordination Meeting I
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l J. O. No. 14358 Midland Plant Units 1 & 2 Independent Assessment of Underpinning Weekly Report No. 41 Activities:
Construction :
Pier KC11: The load transfer was initiated and the proof load criteria met.
Pier E8: The installation of rebar in the hammerhead was completed and concrete was placed.
Pier E10: The acceptance criteria for load transfer was =et.
However, the pier remains on active jacks to obtain engineering data for evaluation of secondary 2
i settlement.
Pier E8 N-S Bulkhead: Excavation of the drift and installation of lateral bracing continued to approximately 15 % completion.
t Pier KC2: Bearing plates and jacks were installed and load transfer commenced.
Pier W8: Installation of rebar in the hammerhead was completed and the concrete was placed.
Pier W10: Load transfer was initiated and the acceptance criteria met. As with pier E10, active jacking will continue to obtain data for evaluation of secondary settlement.
W8 N-S Bulkhead: Excavation of the drift and installation of bracing continued to approximately 25 % completion.
SWPS: Phase H shallow probing was completed and deep probing and sheeted pits for probing continued. Interior well installation began while work on benchmarks i
j and extensometer continued.
BWST: The drilling of anchor holes and fabrication of reinforcing steel continued.
3 Sandblasting existing concrete surfaces and mapping of cracks was continued.
Quality Control, Documentation and Records:
1.
The implementation of nonconformance trending analysis as applicable to under-pinning activities was reviewed.
2.
Reviewed CPCo Audit reports of Dudgeon and of U. S. Testing.
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Lead Auditor qualifications were reviewed for the U. S. Testing and the Dudgeon audits.
4.
Completed inspection reports were examined for the following activities: instal-lation of anchor bolts, grouting, selding of Jack stands, concrete drilling and rebar j
splicing.
5.
QC field inspections were witnessed.
Observations Construction - Load transfer at pier W10 caused slight movement of adjacent piers,
-j particularly W9 which remained on active jacks until late in the week as a result of i
the building movement noted previously. A review of the data being prepared and evaluated by resident engineering does not indicate any unusual pier or structure movement in this area.
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J. O. No. 14358 1
Midland Plant Units 1 & 2 Independent Assessment of Underpinning
)
W ekly Report No. 41 e
j Resident Engineering continues to evaluate all pier load-settlement and structural movement data to assure that no unexpected problems are developing.
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i The Assessment Team observed the results of the installation of several flowable I
grout test panels and two dry-pack test panels. A visual evaluation of the panels indicated no significant defects. Two small void areas were observed in one of the dry-pack panels. Based on these results the Assessment Team believes the Sub-contractor is capable of satisfactorily installing either the dry-pack or flowable grout materials.
Quality Centrol, Documentation and Records:
1.
The trending analysis system implementation has been somewhat modified from its normal usuage for application to the remedial soils work. TC insure that maxi =um benefits are obtained the evaluation of data must be accomplished in a more timely manner.
2.
All audit findings resulting from the Dudgeon and U S Testing Audits were answered in an acceptable manner. Implementation of a few items has yet to be verified by the audit team.
3 Qualifications and certifications of the lead auditors involved in the audits of Dudgeon and U S Testing were in accordance with ANSI N 45.2.23 in all instances.
4, No discrepancies were found in any of the inspection reports which were reviewed.
5.
The QC ' inspections of Hiltibolt installation and torquing were in accordance with the inspection procedures.
The weekly Engineering and Construction Coordination meetings are becoming an effective I
forum for discussion of problem areas. However, timely resolution of outstanding
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NCR's continues to be a nagging problem. The organization involved must strive to
- j significantly reduce the time required for resolution.
During the week an NCR was written on weld rod filler material which was inadvertently used up to 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> after withdrawlfrom the supply station. The specification was recently altered to limit the use time to 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> maximum. Of particular significance was the fact that MPQAD discovered alterations to the weld rod filler withdrawal records associated with this nonconformance. FSO reacted quickly to the situation by terminat-ing the employment of the responsible welding engineer.
Nonconformance Identification Report NIR No.
. Description Date 12 NCR Reviewed for Reportability (Opened) (Closed) under_10 CFR 50.55 (e) part 21.
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Notes of Daily Meeting i
Independent Assessment of Underpinning Midland Plant Units 1 & 2 Consumers Power Company i
Held at Midland Site Lccasion 1
Midland, Michigan
't June 27, 1983 Present For:
i Consumers Power Bechtel MPQAD Stone & Webster G. Murray M. Blendy R. Sevo W. Kilker D. Lavelle P. Barry N. Swanberg J. Gaydos l
Purpose This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
l Discussien Item 1 - SWPS Soldier Pile Installation.
D. Lavelle reported the procedure for drilling and suppbeting the pre-drilled 2 ft. diameter hole is being revised based on the experience on the first pile installation attempt.
J. Gaydos said a change request was processed to use i
grout as the pile backfill rather than concrete.
Item 2 - E/W8 Reinforcing Steel Welding.
l.
D. Lavelle said that the two qualified welders have nearly completed this type of i
welding for pier E8 hammerhead.
Item 3 - Pier KC2 Dry-Pack.
J. Gaydos reported that at pier KC2 the upper leveling-plate dry-pack had been removed after the initial cube break strength did not quite meet the specification requirements. 'Rather than waiting or attempting an engineering resolution, the material was removed and new dry-pack installed.
- Item 4 - Concrete Mix Design.
N. Swanberg stated that the SCN approving new concrete mix designs, including i
superplasticized concrete,is scheduled for release this week.
P. Barry said l-K. Razden ( C P Co ) had discussed the proposed designs with him and the Team 4
concerns were stated.
K. Razden must approve any new mix design prior to release as a project concrete mix.
Item 5 - MPQAD Inspections and Sign-offs.
l R. Sevo will verify that MPQAD has " signature-authorized " perscnnel on-site on l
weekends to assure timely sign-off on NCRs, FCRs, etc.
l-1 i
- Item 6 - ' Auxiliary Building Benchmark Movement.
I W. Kilker reported J.Darby and P. Barry discussed the measures.taken last week to reduce the structurar settlement shown on Unit 1 Auxiliary building as shown by the benchmark in the vicinity of pier W8. Apparently care taken in working
(
around the benchmark combined with some pier re-jacking has reduced the settle-L-
l ment rate to that in effect over the past few months..
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j Notes of Daily Meeting Independent Assessment of Underpinning 2
Midland Plant Units 1 & 2 Consumers Power Company Held at Midland Site Location Midland, Michigan June 27, 1983 Item 7 - Greuting Of Void Between Existing Fill And West Auxiliary Building Foundationq There was a discussion of the grouting of the gap encountered between the soil and auxiliary building foundation during fill excavation. The grout take was nearly 30 cubic feet.
Item 8 - EPA Excavation.
.]
W. Kilker reported that the Assessment Team considered the recent slope lay-back extending under the Unit 1 EPA area to be questionable in terms of the intent of
{
the drawings.
N. Swanberg said Project Engineering agreed with tnis viewpoint but t
from a structural support viewpoint there was no reason for concern.
Item 9 - Assessment Team Scope of Work.
W. Kilker reported that, as per conversations last week with the NRC and CPCo, the j
Team will in the future assess all soils remedial work done en safety related structures or installations.
Items Bequiring Resolution.
Items requiring resolution are indicated by an *.
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Notes of Daily Meeting Independent Assessment of Underpinning l
Midland Plant Units 1 & 2 l
Censumers Power Company
' Held at Midland Site Location Midland, Michigan June 28, 1983 Present For:
I Consumers Power Bechtel MPQAD Stone & Webster G. Murray M. Blendy R. Sevo P. Barry J. Schaub D. Lavelle W. Kilker R. Wheeler N. Swanberg P. Majeski J. Gaydos L. Rouen E. Cviki Purpose This meeting is held each day to discuss items regarding the Independent
-l Soils Assessment at the Midland Plant, Units 1 & 2.
I Discussion l
Item 1 - Plate Tolerances.
-l There was a discussion of tolerance on the 'fluoroloc plate flatness based.
4 on an NCR that has been issued on pier W10 plates.
N. Swanberg reported that tolerances will be provided to better define for QC the' acceptable limits.
Item 2 -Pier E/W8 Status.
M. Blendy reported that rebar welding for E8 is virtually complete and that the similar activity for W8 is now underway.
Item 3 - Pier W10 Status.
M. Blendy presented an outline of.the ' chronology of events that have led to the delays associated with the load transfer at pier W10.
Item 4 - MPQAD Re-inspection of Auxiliary' Building Instrumentation Installations.
R. Sevo reported that MPQAD will re-inspect the open IPIN items and also inspect the remainder of the system. f NCRs will be issued for all open items and new nonconforming conditions that will then require disposition.
Item 5 - Engineering / Construction Coordination Meeting.
M. Blendy stated that in an attempt to improve the: productivity of the meeting an action item list has-been developed and that the goal is to resolve at least 70 percent of all FCRs and NCRs under discussion jat a particular. meeting) prior.to adjournment.
Item 6 - NCR on Furnishing Pressure Grout.
J. Gaydos freported that an NCR was issued on the grout used to fill' the gap between
-l the fill and EPA foundation. The basis for issuance was on interpretation of the will disposition by clarifying the specification wording or discussing the specification requirement for furnishing the grout.
N. Swanberg said Engineering interpretation with MPQAD.
Items Requiring Resolution.
t Items. requiring resolution-none.
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Notes of Daily Report I
Independent Assessment of Underpinning Midland Plant Units 1 & 2 Consumers Power Company Held at Midland Site Location Midland, Michigan June 29, 1983 Present For:
Consumers Power Bechtel MPQAD Stone & Webster
'l G. Murray M. Blendy R. Sevo P. Barry J. Gaydos P. Majeski E. Cviki Parsons
]
P. Parish I
j Purpose This meeting is held each day to discuss items regarding the Independent Soils issessment at the Midland Plant, Units 1 & 2.
Discussion Item 1 - Documentation Concerning Pier Load Transfer.
R. Sevo requested a copy of the load transfer field data sheets from QC prior to Mergentime issuing the final copy.
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- Item 2 - QA Reinspection.
1 l
R. Sevo and M. Blendy stated that a number of NCR's will' be issued concerning
]
reinspection of electrical conduit originally installed as non-Q but now re-inspected as Q.
P. Majeski stated that it would be important to review these a
1 NCR's to determine ir the'. nonconforming items were an indication of construction quality on nonQ items, the result-of as-built conditons or the result of diff-ering inspection criteria.
G. Murray stated that none of the NCR's to date con-cerns the integrity of the system.
- Item 3 - Use of FCR's For Drawing Revisions.
P. Parish stated that often drawings were difficult to review because of the number of attached changes and the physical problem of looking on the back of the drawing. In the past, these documents were kept in a binder but CPCo requested that they be attached to the drawings.
E. Cviki will look up the current require-ments for reissuing drawings based upon the number of outstanding changes. It was also mentioned that an FCR, etc. is usually written to approve a field as-built condition prior to QC inspectionto prevent an NCR from being written.
M. Blendy-stated that from three to six FCR's are usually issued a day.
Item 4 - Building Settlement.
E. Cviki stated that the differential settlement from DSB 2W had leveled off in the last few days but still was being monitored, t-Items Requiring Resolution.
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- Items requiring resolution are indicated by an *.
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2 Notes of Daily Meeting Independent Assessment of Underpinning i
Midland Plant Units 1 & 2 i
Censumers Power Company i
Held at Midland Site Location Nddland, Michigan June 30, 1983 Present For:
Consumers Power Bechtel MPQAD Stone & Webster j
G. Murray M. Blendy R. Sevo P. Barry K. Ra: den J. Gaydos
- P. Majeski E. Cvikl l
D. Lavelle
- Parsons J. Kelleher p, p,pg, i.
D. Himmelberger
- Part time.
- Purpose 4
This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
Discussion l
Item 1 - Rebar Welding For E8.
An NCR was written against the welding of rebar because a portion of the weld-ing was done with weld red which was in use for more than the specified 10 hour1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> period. This situation inadvertently occurred because of two factors. The first i
being that the weekend shifts on which much of the work was performed were 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, rather than 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br />. The second factor is that there has been a recent specification change cutting the allowable time from 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> to 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br />.
D.
Lavelle advised the Assessment Team that the FSO Lead Field Welding Engineer was terminated for altering the weld rod withdrawal records associated with the E8 welding nonconformance described above.
- Item 2 - Carlson Meters.
P. Barry questioned if the WJE procedure on Carlson Meters may need changing as a result of an upcoming specification change.
- Item 3 - Pumped Grout Test Program.
The results of the testing of g" outing procedures of the first four test plates showed satisfactory results. Three additionsl plates were grouted and one dry packed on June 29. During this test series, plate bulge as high as 3/8 inch was noted.
R. Sevo indicated that the MPQAD inspector noted pressures of up;to125 psi during grout placement. There was some discussion as FSO had noted maximum.
pressures of.12-14 psi.
R. Sevo is to confirm his understanding of MPQAD's ob-servation.
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Notes of Daily Meeting Independent Assessment of Underpinning Midland Plant Units 1 & 2 Consumers Power Company Held at Midland Site Location Midland, Michigan June 30, 1983 Item 4 - EPA Excavation.
No NCR is to be written for overexcavation under the Unit 1 EPA as the drawings give the RGE authority to layback the slope as required. No specific dimensions j
are provided on drawings and engineering has no additional concerns, j
Item 5 - Lead Transfer Acceptance Determination.
f Paul Barry asked how rebound would be taken into consideration in determining i
acceptance of a pier after load transfer.
E. Cviki is to determine method I
of acceptance.
Item 6 - Carlson Meter Readings at Pier W11.
P. Barry asked if Carlson meter information would be used to determine a need to rejack W11 or any other pier.
K. Razden indicated that the intent is i
to maintain constant elevation of the structures.
4 Items Requiring Resolution.
Items requiring resolution are indicated by an *.
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Notes of Daily Meeting Independent Assessment of Underpinning l
Midland Plant Units 1 & 2 Consumers Power Company i
Held at Midland Site Location Midland, Michigan July 1, 1983 Present For:
Consumers Pcwer
'Bechtel MPQAD Stone & Webster G. Murray M. Blendy R. Sevo P. Majeski 2
E. Cviki D. Himmelberger' Parsons P. Parish Part time.
- 1 Purpose This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
Discussion Carlson Meters.
Item 1 E. Cviki indicated that the WJE procedure will require changes as a result of the upcoming specification change. Forecast dates for completion are being developed.
Item 2 - Use of FCR's For Drawing Revisons.
E. Cviki provided copies of the pertinent pages defining the criteria to be used for reissuing a drawing based upon the number of outstanding changes. In., summary these are: 45 days since approval of first FCR/FCN against the drawing; 10 days have elapsed since the 10th FCN; and, 30 days since the 15th FCR, FCN and DCN, 3
i taken in total.
Item 3 - Pumped Grout Test Program.
R. Savo indicated that the high pressures noted by MPQAD inspector during the pumping operation were only instanteous " spikes" during the hand pumping oper-ation.
M. Blendy indicated that the test panel for the dry pack did not go as well as for the pumped grout. It was his understanding that the crew was not as experienced as the crews actually performing the work at the piers. An add-itional test panel is to be constructed using dry pack.
P. Parish said that it was his understanding that the dry pack used for the test was r.ot as moist as that used at the piers. He further stated that all of the panels including the dry packed panel appeared acceptable to him.
Items Requiring Resolution.
Items Requiring Resolution-None.
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Notes of MPQAD Meeting Independent Assessment of Underpinning Midland Plant Units 1 & 2 Held at Midland Site Location Midland, Michigan June 28, 1983 1
Present For:
Stone & Webster MPQAD P. Barry R. Oliver j
P. Majeski D. Horn
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L. Rouen M. DeWitt W. Kilker J. Meisenheimer j
Purpose This meeting is held each week to obtain information from MPQAD regarding the soils underpinning work at the Midland Plant Units 1 & 2.
Discussion Item 1 - Status of NIR # 12.
J. Meisenheimer reported that the QAR has been dispositioned and a revised NCR form will be forthcoming to include the "reportability" consideration.
Item 2 - Instrumentation IPINe.
J. Meisenheimer explained that MPQAD will re-inspect the open IPIN items and issue NCRs as required. In addition, MPQAD will re-inspect the remainder of the' instrumentation system installation. The majority of these open items l
are electrically related.
Item 3 - MPQAD Signature Authority.
M. DeWitt and J. Meisenheimer explained that signature authority has been designated for all work shifts. However, in the case of sensitive issues or disputes over interpretation. department supervisory signature shall be obtained.
Item 4 - Revised Instruction onIssuing QC Hold-Tags.
J. Meisenheimer reported the instruction on issuing QC Hold Tags is being revised. Once implemented,there should be less delay in actually placing the tag and thereby a reduction in confusion with the field personnel as to the " limits" of the hold area.
Item 5 - MPQAD Activities Status.
R. Oliver reported that presently his group is concentrating on reviewing drawings for Control Tower piers. Few Work Activity Pr:kage submittals are coming through from the FSO Constructability group, i
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STONE & WEBSTER MICHIGAN, INC.
P.O. Box 2325. Boston. MASSACHUsms 02107 i
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I United States Nuclear Regulatory Commission May 18, 1983.
i Midland Site Resident Inspection Office Route 7 J.O. No.
14358 Midland, MI 48640 Ref. MPF 34 Attention Mr. R. Cook i
RE: DOCKET NO.
50-329/330 MIDLAND PLANT - UNITS 1 and 2 INDEPENDENT ASSESSMENT OF UNDERPINNING REPORT NO.
34 A copy of the Independent Assessment of the Underpinning Weekly Report No. 34 for the period May 8, 1983 through May 14, 1983, 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. In the Meetings attended portion of Weekly Report No. 32 the reference to a meeting with an NRC consultant *is in error.
The reference should have been to a meeting with the Contractor's Consultant.
If you have any questions with respect to this report, please contact me at (617) 589-2067).
Very trul yours, be a)
A. Stanley Lucks Project Manager Enclosures ASL/ka f
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'J.G. No.
14358 i
Midland Plant r
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Units 1 and 2
. Independent Assessment of Underpinning i
Weekly Report No. 34 May 8, 1983 th' rough May,14, 1983 Personnel on Site Stone & Webster' Michigan, Inc.
S. Lucks 5/11 - 5/13 W. Kilker 5/9 - 5/14 P. Barry 5/12 - 5/14 A. Scott 5/9 - 5/14 B. Holsinger 5/12 - 5/14 Parsons, Brinckerhoff Michigan, Ihc.
W. Parish 5/10 - 5/13 L. Silano 5/11 Meetings Attended j
Date Represented
' Purpose 5/9 Stone & Webster Daily Meetings through Bechtel 5/13 Consumers Power Tarsons 5/11 - 5/12
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5/10 Stone & Webster Discuss Method Of
.i Bechtel Determining The Exter Consumers Power Of Work Impacted by Issuance Of A Non-1 Conformance Report S/11 & 5/12 Stone & Webster Discussions Of Pier Bechtel Load Test Data Consumers Power Parsons NRC 5/13 Stone & Webster Discuss Work Package Consumers Power Review Of Grillage NRC Beam Installation And General Concept
~
Of Work Package Overview Activities Construction -
Pier Ell:
Non-routine rejacking was performed in order to replace a driven wedge.
l KC11 Drift: There was limited progress on the advancement or completion of this drift. The Contractor is considering eliminatir.g or modifying drift sets and a reshore member since the entire face excavatior. is in concrete. Work is halted pending the processing of the change request.
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14358 Midicnd Pltnt l
Units 1 and 2 rS
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Independent Assessment of Underpinning 2
I Pier E8:
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between approximate El.The work was limited to the installation of 3 ring lagging 570 & 574 fabrication of the bell support steel.Further work was delayed pending the Pier E10:
The excavated material was mainly clay fill to approximate 575.
the natural clay till.
. 586 underlain by
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a tamporary shut down of the pier E12 access pit sump pum corrected, the pier seepage was quickly reduced.
Once KC2 Drift:
The finger drift to the pier was excavated approximately 3 ft.
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excavated face consisted of unreinforced concrete with an interbedded laye The soil fill.
The advance of the drift was halted pending the resolution of the proposed slope layback change.
4 j
k Pier W8:
in the natural clay till.The pier excavation and lagging advanced from near El. 58 j
. 576 Minor groundwater seepage continued to enter the
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excavation from near the fill clay interface. -Work on this pier was halted pending the fabrication of the ring sets and bell bracing steel.
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Pier W10:
The pier was excavated and lagged to approximate El. 580. During i
excavation of the fill material near El 590 a void developed behind the pier lagging betwee7 piers W10 and W11.
The distance between piers W10 & W11 is 20 inches.
granular soil till into the pier excavation resulting in a l
one cubic yard. The work was halted and the void zone was prepared and g
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y Since the grouting of a substantial number of the lagging spaces seepage has been ainor.
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West Access Pit:
, groundwater due to rain water draining from the FIVP temporary shelter j
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SWPS:
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Two (2) piezameter wells (LS6 & LS12) and two (2) dewatering wells j
(567 & 576) were completed and two (2} dewatering wells (555 & 561) l were started.
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Quality Control, Documentation and Records:
1.
Reviewed lion-Conformance Reports issued against drift asts in plac 2.
Started areview of Non-Conformance Reports for potential trends and
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what action has been taken by the Contractor to solve any generic problems.
Observations j
_ Construction - Construction activities were limited by a number of fac l
affected various sessents of the work. At the start of the we halted for nearly one day in order to resolve concerns over Non-Conforma i
Reports issued on temporary drift supports.
i,*
KC2 and KC11 drifts was stopped pending resolution of change requests slope laybacks.
approved bell bracing to complete the piers. Advancement on piers E/W8 e
regard that the work be done in a procedurally correct manner.The Contractor demo were not started awaiting the rolesse of all bell bracing.
Bell excavations the exposure of the structure to risks associated with excavating the bell This approach limits However, the Assessment Team's on-going concern over the lack of av area.
approved materials and the timely resolution of Non-Conformance Reports a
- . equesta continues.
These concerns are currently being addressed by the Owner and the Contractor.
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'.O. No.
14358 J
Midltnd Pltnt p
Units 1 and 2
]
Independent Assessment Of Underpinning 3
I Quality Control, Documentation and Records - In Weekly Report No. 33 the Assessment Team expressed concerns over the issuance of QC hold-tags on parts of the underpinning temporary support system that had,already been put I
in-service. Meetings have been held between the Contractor and HPQAD to resolve this issue. It is imperative that (1) the programmatic r,equirements for dispositioning any such NCR's be fully understood and agreed upon by all of the groups within the Organization and (2) the NCR disposition cycle be streamlined to minimize delays in the underpinning work.
)
. Design Work Packages
'lhe Assessment Team performed an overview of the design work packages relating to (1) the replacement of *n existing fireline near the SWPS. (2) the installation of piers E/W 13/14 and the excavation of soil zones beneath the existing structures and the access shaft to El. 600, (3) the SWPS soldier beam installation and (4) a duct bank exposure near the auxiliary I
building.
Questions raised by the Assessment Team are in the process of being resolved.
The Assessment Team discussed the design package overview methodology with the NRC representative.
It was agreed the present overview approach ful-fills the intent of the NRC request on work package overview.
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.Non-Conformance Identification Reports Status of previous issues:
(NIR numbers no longer listed have been closed-4 out.)
NIR No.
Description Date
)
5 Concrete Mix 1
2/10/83 Qualification 6
Lagging spacers 3/21/83 7
Backpacking Material 4/5/83 in Wet areas-Pier W11 I
8 Load Transfer Method-4/5/83 ology - Pier E12 i
9 Release of Pier W9 4/13/83 for Load Transfer 10 Verification of 4/21/83 Vibrator Frequency I
b Project Engineer g Project Manager g L.
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DAILY INDEPENDENT ASSESSMENT TEAM MEETING i
Date May 9, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo E. Cviki W. Kilker G. Murray J. Gaydos J. Fisher D. Lavelle M. Elendy i
i 1.
J. Fisher explained that the field work will likely be terminated until there is a clarification or understanding on the status of the effect of issuing NCRs on a particular ites and the impact on subsequent work. At the present time, there are numerous hold-tags in the drift and pier excavations that have not been dispositioned. MPQAD, Field Engineering and Resident Engineering will convene to resolve the issue.
2.
J. Fisher reported the approval for the drawing restraining the fabrication of piers E/W8 ring beams and bell bracing has been obtained and fabrication began on May 8.
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3 W. Kilker stated the Assessment Tema continues to have concerne over the time required to disposition of NCRs - particularly those associated the temporary support systes'dbtails. Thevarious project organizations must streamline the NCR issuance / disposition cycle in order to avoid the repeated delays that continue to plague the work. In addition, the Team feels there are areas, again relating in particular to the temporary support system, where Engineering clarification or definition of allowable tolerances could provide an improved fraavork within which Mp0AD can perfore their inspections.
l 4
W. Kilker reported that to-date the backpacking quality on pier V8 lagging is good and that the inspection has been facilitated by the increased lagging spacer size.
5.
J. Gaydos said that FSO is withdrawing the proposed concrete vibrator frequency verification procedure. OC will perform this verification by incorporating the requirement in the proper procedure.
i 6.
E. Cviki reported that in order to evaluate the Tesa question on the thickness of the lower bet. ring. plate unit, during the rejacking of pier W11 speo&ol attention was given to the jaek #4 and lower bearing insta11st10tf. ~ Engineering ooncluded that the greater thickness is the result of the origins 1 condition and not related to the application of the loed.
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i DAILY INDEPENDENT ASSESSMENT TEAM MEETING 3
t Date: May 10, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo j
J. Gaydos A. Scott R. Sevo G. Murray t
I 1.
J. Gaydos and R. Sevo stated that resolution of QAR on vibrator frequency
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verification will be closed, b
2.
J. Gaydos advised that J. Fisher is addressing problesortime required to process NCRs.
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Process r.>r final sign,o.at}.
f The QAR on the concrete, vi [ator fra gency vey ificati6n hs been completed.
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DAILY INDEPENDENT ASSESSMENT TEAM MEETING Date: May 12, 1983 Attendees:
Bechtel Stone / Webster MPOAD CPCo J. Gaydos A. Scott R. Sevo M. Blendy S. Lucks j
J. Fisher W. Kilker j
D. Lavelle i
E. Cviki l
Parsons P. Parish' y,
1.
D. Lavelle reported that the guideline on Construction Aids was signed out by FSO.
2.
J. Fisher reported that FSO and Engineering have assigned individuals to process NCRs to expidite the disposition process.
3 A. Scott questioned why the work was stopped on pier E10 near the end of the night shift when concrete was encountered near El. 590.
J. Fisher j
explained that the issue should have been resolved by contacting FSO to investigate the nature of the concrete and then issue a drill permit.
4.
W. Kilker questioned if the elimination of drift se2 has been considered in areas where the drift sets are entirely in concrete.
J. Fisher replied that on KC11 the final sets will likely be eliminated after a change request is processed..
't 5.
J. Gaydos reported that the concrete testing on the mud-mat pours will be i
streamlined once a change request is approved.
6.
J. Fisher reported that on pier W10 a void had developed overnight behind i
the lagging between 6 ft. and 12 ft. below the surface. Granular fill moved into the excavation along with perched groundwater. The size of the voit was limited by the relatively small extent of granular fill. The Subc ntractor is in the process of pumping.the water out and preparing the pier for grouting the void space.
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i DAILY INDEPENDENT ASSESSMENT TEAM MEETING Date May 13, 1983 4
Attendees:
Bechtel' Stone / Webster MPQAD CPCo J. Gaydos A. Scott R. Sevo G. Murray J. Fisher W. Kilker D. Lavelle i
E. Cviki 1.
J. Fisher and 3. Lavelle said the organization is continuing the effects to expedite the conditional release process where applicable.
2.
J. Fisher advised that the void that developed at pier W10 has been grouted.
3 There was a general discussion of how the implementation of the proposed change to eliminate the slope lay-backs will be initiated.
4.
J. Fisher reported that the pier KC2 drift.has been shut down pending the resolution of the slope lay-back issue. KC drift is awaiting the resolution i
of an FCR on re-shoring.
5.
Pier W8 will not advance until ring sets are ready. Projected date is May 16.
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ry lscs f N STONE & WEBSTER MICHIGAN, INC.
WRA A/0A 4,m P.O. Box 2325. BOSTON. MASSACHUSETTS O2107 23, 1 NLT(
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i United States Nuclear Regulatory Commission May 10, 1983 Midland Site Resident Inspection Office Route 7 J.O. No.
14358 Midland,'MI 48640 Ref. MPF 33 Attention Mr. R. Cook I
RE: DOCKET No. 50-329/330 MIDLAND PLANT - UNITS 1 and 2 INDEPENDENT ASSESSMENT OF UNDERPINNING
]
REPORT No. 33 j
A copy of the Independent Assessment of the Underpinning Weekly Report No. 33 for the period May 1, 1983 through May 7, 1983, 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).
Very truly yours, 3
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'A. Stanley Lucks Project Manager i
Enclosures ASL/ka h
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WAY 161983 l
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,Miditnd Plant Units 1 cnd
independent Assessment ol.nderpinning
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Weekly Report No.
33 May 1 1983 through May 7. 1983 Personnel on Site i
Stone & Webster Michigan, Inc.
t' W. Kilker 5/2 - 5/7 P. Barry 5/2 - 5/3 i
i L. Rouen 5/2 - 5/6 Parsons, Brinckerhoff Michigan, Inc.
J. Ratner 5/2 - 5/6 Meetings Attended t'
I Date Represented Purpose 5/2 Stone & Webster Daily Meetings through Bechtel 5/5 Consumers Power Parsons 5/3 - 5/5 Activities
_ _ ~
Ccnstruction -
Piers E/W 12: These piers have been completed and loaded for nearly 2 months.
Unless non-routine rejacking or other unusual actvitity is performed at these piers no activity description will be included in this or future reports.
i Piers E/W9: These piers have been completed and loaded for approximately 5 weeks.
l As in the case of E/W12 piers, activity descriptions on these piers will be generally omitted from future weekly reports.
Pier E11: No activity.
3 l
KC11 Drift: The excavation and lagging is virtually complete with only one drift set remaining to be installed. A sizable ~ portion of 'the excavation was through unreinforced concrete - particularly in the northeast segment of the drift nearest pier E12. Along the southwestern side of the drift the thickness f
of concrete decreased to approximately 1) ft.'with clay fill making-up the remainder of the excavated section.
-i Pier E8: No further work (beyond the previously reported depth of 24 ft.) was
}
performed on this pier. Drawing changes to the bell support system delayed the release for fabrication of not only the bell support steel'but the lagging ring beam sets above the bell.
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independent Assessment o.
enderpinning 2
i Pier E10 Drift: The excavation and lagging support has been complete. The excavated material consisted of approximately 1 ft. of unreinforced concrete underlain by clay fill.
East Access Shaft (Zone between access pits to E12 and E11): A cut slope in this area slumped on May 7 after a period of heavy rainfall. The Contractor cleared the area and installed wood lagging to prevent further slippage.
Pier W11: The pier load time deflection criteria was satisfied and the load transfer to wedges and the required routine rejacking of the pier was performed.
KC2 Drift: The excavation was completed to 8 ft. south of a line formed by the south side of piers W1'1 and W12. The excavated material consisted of unreinforced concrete and sand / clay fill with a horizontal layer of fill sandwiched between concrete in certain areas.
j I
Pier W8: The pier excavation and lagging was installed to El. 587 - a depth of approximately 13 ft.
The excavated material was generally a clay fill. Minor 3
groundwater seepage entered the excavation at El. 587.
I.
Pier W10 Drift: The excavation and lagging support was completed. The excavated material consisted 1 ft of unreinforced concrete underlain by a mixture of clay and sand fill. The pier template was located in preparation for the pier excavation.
i 4
Slope lay-backs north of piers E/W10: The Contractor excavated the; slope lay-back on approximately a 1:1 slope in the existing fill materials.
SWPS: The Contractor began the installation of dewatering wells within the pumphouse. To-date the activity has consisted of the completion of 2 SPT borings.
C-Quality Control, Documentation and Records:
1.
Assessed the proposed procedure for verifying the concrete vibrator frequency.
2.
Observed the identification procedures used to control fabricated materials in the on-site fabrication shop.
3 Reviewed the qualifications and certifications of several QC inspectors that performed inspections on piers E/W9, 11 and 12.
The inspection 4
activities included excavation and lagging, mechanical splicing, rein-forcing steel placement, concrete placement, bearing plate installation and load transfer.
T
'4.
Reviewed the issuance and use of the QA/QC Inspection Reports on the inspection activities tabulated under Item 3 above.
i 5.
Observed the Engineering and QC inspection of the SPT borings performed in the SWPS.
Observations Construction - The advancement orthe drifts to KC2 and KC11 piers was hampered i
' by the presence of unreinforced concrete - in the case of KC11 by the sheer l
quantity and at KC2 by the delay caused in determining the nature of a segment l,
of " formed" concrete.
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- Midinnd Pltnt Unit's 1 cnd 2
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Independent Assessment ot dnderpinning 3
The Contractor responded to the slippage of the soil mass extending into the access shaft north of the KC11 drift by quickly installing lagging to prevent further slope deterioration.
The lagging set spacing at pier W8 is generally on the order of li inches. A random verification of the backpacking quality indicated the granular backpacking material is generally filling any void space between the excavated soil and lagging sets. However, the inspection process is still hampered somewhat by the presence of the backpacking material extending well into the louvered area between lagging sets.
The pier W11 load transfer was completed by locking-off the loa'd to the jackstand l
wedges. The Owner / Contractor will discuss with the NRC the engineering data obtained from this pier and others loaded to date.
The delay of more than one week in field activities on partially completed pier ES due to design changes in the construction support system, in the Assessment Team's opinion, does not represent an endorsable planning / construction methodology.
The Assessment Team feels the Contractor should be better prepared to complete a i
pier prior to initiating the excavation.
I Quality Control. Documentation and Records - The fabrication shop was properly and clearly identifying and segregating QC " accepted" and "cn-hold" materials.
The review of the inspector's certifications to perform inspections on numerous critical activities at 6 of the piers installed to-date indicated that the qualification and certification requirements were met by these individuals and that the issuance and use of the QC Inspection Reports was correct.
~
The Assessment Team requested a clarification on the assignment of the responsibility for verification of the concrete vibrator frequency. The Contractor agreed to l
address this concern.
l The Assessment Team raised a concern about the practice of allowing field work to proceed beyond a stage in the construction where a NCR " hold-tag" has been installed on a certain item (s). If this practice is to continue there should
~
be a means of documenting Engineering approval for the continuation of the field work.
The Assessment Team has an on-going concern over the lack of timely disposition of numerous outstanding QC hold-tags that have appeared on installed material.
The majority of the NCRs written that have appeared as " hold-tags" in the work area have dealt with the temporary support system - drift sets, anchor bolts,'
drift set plates and pier lagging. If the work is going to proceed on a
' reasonable schedule the Organization (Engineering, Quality Assurance and Con-struction) must address and eliminate the numerous delays associated with non-conformances relating to these temporary support system details. As an example, at the present time in the pier W8 drift and pier excavation these are approximately 30 NCR " hold-tags". While some of the tags are a matter of only a few days old others have been in place nearly two weeks. It is our opinion that the nature of the majority of these non-conformance is'such that complete dispostion should be accomplished easily within a few days i
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49330
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Independent Assesement os Underpinning 4
1 Design Work Packages and Procedures - The Assessment Team performed an overview of the design work package relating to the installation and load transfer to 7
piers E/W 10, Kc2, Kc3, Kc10 and Kct). In general, the package was complete.
However, the Team discussed with the Owner the degree to which drawings and procedures should be actually included in the " package" or referenced as existing.
Non-Conformance Identification Reperts Status of previous issues:
(NIR numbers no longer listed have been closed-out.)
NIR NO.
Description Date (Opened)
(Closed) 5 concrete Mix 2/10/83 Qualification i
j 6
Lagging Spacers 3/21/83 7
Backpacki%g Material 4/5/83 in Wet sreas-Pier W11 8
Load Transfer Method-4/5/83 ology - Pier E12 9
Release of Pier W9 4/13/83 for Load Transfer 10 Verification of 4/21/83 Vibrator Frequency t
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DAILY INDEPENDENT ASSESSMENT TEAM MEETING Date: May 2, 1983 t
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Bechtel Stone / Webster MPQAD CPCo D. Lavelle P. Barry R. Sevo G. Murray J. Fisher i
J. Gaydos Parsons J. Ratner D. Lavelle provided a copy of the latest data for the load test of pier W11.
1.
Bechtel The pier is maintained on jacks at 110 per cent of specified load.
and CPCo intend to have a conference call with the NRC to discuss the test 4
t results.
i.
4-2.
J. Fisher stated that the " Administrative Guideline" for Construction Aid Procedure had been distributed for final comment. The Assessment Team has been provided with a copy.
3 D. Lavelle will provide a copy of the NCRs written on weld fabrication last week.
I' 4.
J. Fisher read E. Cviki's response to the April 28th question concerning unreinforced KC piers. These piers are designed as pedestals in accordance with ACI 318. Soil support allows these piers to be constructed with plain concrete.
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P. Barry questioned why expansion achers in the east drift,that have tags.were put "in service" by the fact that the drift excavation was allowed
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to proceed beyond the point of infraction. These NCRs were written when l
after a reinspection the excavation had progressed past the affected drift In the West drift the excavation waited until the drift sets inclading sets.
expansion anchors were properly installed. Bechtel is aware of the situation and will provide an explanation.
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Date: May 3, 1983 Attendees:
Bechtel Stone / Webster M? CAD CPCo J. Fisher W. Kilker J. Shah J. Gaydos L. Rouen i
Parsons 1
J. Ratner j
!'l 1.
J. Fisher explained that the delay in completing the shaft portion of pier E8 I
is due to lack of approval for the shop drawing showing changes in the lagging j
sets just above the bell elevation. Approval is expected shortly so fabrication can proceed.
4 2.
J. Fisher and J. Shah explained the basis for determination of whether or 1,
j not work proceeds in a particular area after an NCR has been issued by 1
MPQAD. After issuing a particular NCR, MPQAD discusses the matter with j
Resident Engineering in terms of impact on proceeding with construction.
At that time the NCR is worded in terms of prohibiting or allowing work to proceed "around" the subject of the NCR. L. Rouen agreed that this type of action or discussion on an NCR would be appropriate providing there was a method of documenting the Engineering concurrence. In the case of the i
E8 drift Hilti-bolt related NCRs, it was determined that the nature of the non-conformances was such that work could proceed.
J. Fisher said FSO had dispositioned these particular NCRs to Engineeringand were awaiting resolution.
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General discussion of the up-date on pier W11 load test.
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DAILY INDEPENDENT ASSESSMENT TEAM MEETING i
Date: May 4, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo J. Gaydos L. Rouen J. Shah G. Murray E. Cviki W. Kilker A. Blocher Parsons J. Ratner 1.
W. Kilker said the Assessment Team observed the NCR on pier W9 concrete placement has not been removed. ESO will investigate.
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There was a discussion of backpacking of lagging sets on pier E8. The Assessment Team observed that the lagging spacers were on the average 1-1/8 inches thick and that the backpacking material was still being placed to the inside face of the lagging. In the opinion of the Team i
both of these conditions continue to hamper somewhat the backpacking operation and in particular the inspection process. FSO will take action.
3 E. Cviki advised that the shop drawings for E8 ring beam lagging sets should be signed out today allowing fabrication to commence. However, I'
field work will not begin until all fabrication is completed.
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.s DAILY INDEPENDENT ASSESSMENT TEAM MEETING l
I Date: May 5, 1983 i
I Attendees:
Bechtel Stone / Webster MPOAD CPCo 1
E. Cviki W. Kilker R. Sevo J. Gaydos L. Rouen J. Fisher D. Lavelle i
Parsons J. Ratner D. Lavelle and W. Kilker discussed the potential impact on construction 1.
j with the use of the proposed Construction Aid Procedure.
D. Lavelle said defining certain of the construction operation and installation as Construction Aids should have a positive impact on the underpinning activity.
j J. Fisher provided a Mergentime schedule for the installation of pier E8 and l
2.
E8 grillage.
3 W. Kilker reported the Team's observation of the QC hold tag on pier W9 t
concrete pour. FSO will investigate to determine state of disposition.
4.
J. Fisher reported that FSO concurred with lagging spacer sizes on pier ES.
In order to expedite the inspection process spacers in the future will be on the order of 1-3/8 1/2 ir.ches thickness.
l S.
L. Rouen questioned the assigning of responsibility for checking the concrete viberators - would it go to Field Engineers or QC. FSO will take action to j
discuss the responsibility.
6.
J. Gaydos provided a copy of al1 NCRs related to tolerances to the Assessment Team.
1 J
7 J. Ratner questioned why the lower level plates at jack #4 on pier W11 do not level up with adjacent plates. FSO will take action to determine that load application is appropriate.
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DAILY INDEPENDENT ASSESSMENT TEAM MEETING Date: May 6, 1983 i
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No meeting was held on this date.
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P.O. Box 2325. BOSTON, MASSACHUSETTS O2107 7-i i
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United States Nuclear Regulatory Commission May 5, 1983 Midland Site Resident Inspection Office Route 7 J.O.
No.
14358 Midland, MI 48640 Ref. MPF 32 Attention Mr. R. Cook RE: DOCKET NO.
50-329/330 MIDLAND PLANT - UNITS 1 and 2 INDEPENDENT ASSESSMENT OF UNDERPINNING REPORT NO.
32 A copy of the Independent Assessment of the Auxiliary Building Underpinning l
Weekly Report No. 32 for the period April 24, 1983 through April 30, 1983, is enclosed with this letter. Included as attachments, are the minutes of i
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 his report, please contact me at (617) 589-2067).
Very truly yours, bI b.l's SVtg i
A. Stanley Lucks Project Manager Enclosures ASL/ka pnJdM4 h i
MAY 9 883 i
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Midland Plent Units 1 and 2
-s Inde;e
+t Assessment c. Underpinning
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Weekly Report No. 32
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Acril 24 1963 through Arril 30. 1953 1
Personnel on Site t
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Stone & Webster Michigan, Inc.
i A. Scott 4/25 - 4/30 f
P..Barry 4/25 - 4/30 P. Majeski 4/25 - 4/30 i
Parsons, Brinckerheff Michigan, Inc.
d l
J. Ratner 4/25 4/26 l
Meetings Attended
)
l Date Reeresented Purpose 4/25 Stone & Webster Daily Meetings I
through Bechtel i
4/29 Consumers Power j
Parsons (4/26 - 4/29) ~
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4/26 Stone & Webster (Part-time)
Meeting To Analyze l-bechtel Lead Test Results Consumers Power (Part-time)
With NRO Censultant i'
4/26 &
Stone '& Webster Up-Date en Status 4/27 Bechtel of Pier W11 Load Consumers Power Test Mergentime Parsons l
4/29 Stone & Webster Weekly Soils Review Bechtel Consumers Power Activities Construction -
Pier E12: The load transfer remained in the active jack mode until April 26 at which time the deflection criteria was satisfied and the load was locked-eff.
Pier E9: The load transfer remained in the active -jack mode until April 27 at which time the deflection criteria was satisfied and the load was locked-off.
Pier E11: The initial load transfer was completed on-April 26 and rejacked per specifications for the succeeding 3 days.
Drift to KC11: The excavation, between piers E11 and E12, was started on A;ril 27 and progressed approximately 10 ft. Tne excavated material consisted of clay fill and lean concrete. The thickness. of concrete decreased from nearly the full cut face at the start of the drift to approximately 2 Rft. at the 10 ft. peint.
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MI l
J.O. No.
i*soo Midland Plant 4
. Units 1 and 2 Incep'endent Assessment et,nderpinning 2
Pier E3: The drift was completed and pier excavation and lagging acvanced te a depth of 24 ft.
The excavated material consisted of zones of clay and granular fill to El. 586 underlain by the natural clay till. No groundwater enterec the excavation.
Ficr W3: Progress on the drift was hampered by Hilti-bolt installation problems.
- he drift was near cc:pletion by week's end.
Pier W11: The load test started on April 25.
Reduction of the early test cata i
indicated the pier lead as measured by the upper Carlsen meters was not tne same as the load jacked into the pier and the lower Carlsen meters recorded considerably less load than the upper Carlson meters. Also, the measured elastic shortening of the pier is significantly less than theoretical and the i
anti-friction liner moved down with the pier.
Additional information was obtained to aid in the analysis of these results by
- However, increasing the lead to the maxi =um allowable and by cycling the load.
neither of these procedures resulted in resolving the disparity in the Carlson Further discussions with the NRC are required before additienal neter readings.
steps are taken.
Service Water Pump Structure: An FCR was issued to permit cutting of selected reinforcing bars in the existing cat for installation of dewatering wells and/cr On the exterier of the structure the contractor placed numerous piccometers.
pipe casings through which the soldier piles will be installed.
j Cuality Control. Documentatien and Reccrds:
1.
Witnessed CC inspection of pressure grout fix fer Hilti-bolts in the W3 drift.
2.
Witnessed CC/CA inspection of rejacking of pier E11.
3 Witnessed CC inspection of load transfer at pier W11.
t, Ctservations Ccnstruction - The rejacking of piers E9, E12 and E11 was acccrding to the a;;reved j
prececures.
The continued problems encountered during installation of the Hilti-belts in the drift to pier WE indicate a need for additional flexibility in the installation requirements or the consideration of alternate support system details. However, to-date the Centracter has remained resolute in adhering to pre-established procedures despite significant senedule impacts.
Tne Contractor responded promptly to the initial test results obtained at pier W'1.
Consultants were contacted and advised of the situation within 24 hcurs. An alternate l
procedure was formulated and discussions with the NRC continued until April 29 at which time permission was granted to cycle the load to test the responsiveness of the Carlson meter.
Quality Control Documentation and Records - The CC inspections witnessed by the Assessment Team were thorough and in compliance with the F.PCAD documents.
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... w Miditnd Plant Un'its 1 and 2
'I dn ependent Assessment of oderpinning 3
)
e Design Work Seekages and Procedures - The Assessnent Tea = performe: an overview of the teennical ;recedures relating to the installation an: lead transfer t:
the grillage beams.
Nen-Confernance Identification Recorts Status of previous issues:.
(NIR nunbers no longer listed have been closed-j out.)
NIR NO.
Description Date (Opened)
' Closed) 5 concrete Mix 2/10/83 Qualification 6
Lagging Spacers 3/21/83 l
7 Backpacking Material 4/5/83 in Wet areas-Pier W11 i
8 Load Transfer Methodology 4/5/83
-Pier E12 9
Release of Pier W9 4/13/83 for Load Transfer 10 Verification of.
4/21/83 Vibrator Frequency s
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3 DAILY INDEFENDENT ASSESSMENT TEAM MIETIN3 Date April 25, 1983 Attendees:
Sechtel Stone / Webster MPCAD C?00 C. Murray J. Fisher A. Scott j
J. Gaydos R. Wieland I..
ij J. Fisher stated that the Adninistrative Guideline, FIU - 1.100 would 1.
j be revised and ready to be issued en April 27, 1953 2.
Sechtel stated that an FCR has been written on the checking of vibrat rs in concrete.
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i DAILY II DEFE! 0E!T ASSESSME!;T TEAM MIE!!!:0 Date:
April 26, 1983 J
Attendees:
Bechtel Stone /*a'eb s te r MP:A0 CF:0 I
J. Fisher A. Sectt G. Carpenter G. Marray i
J. Gaydos P. Barry D. Lavelle P. Majeski M'. Blendy.
Parsons J. Ratner l
1.
The issue date for Ad=inistrative Guideline FIU-1.100 (Constructicn Aid Procedure) has been changed from April 27 to April 29.
2.
There was further discussion regarding frequency of checking of concrete vibraters.
The consensus was that the vibrators would be checked in cencrete often. Sechtel will be working out the details in the next few days.
3 J. Fisher requested that in order to expedite responses to future NIR's a copy should be brought to the next scheduled Daily Meeting rather
.har. waitins fer the NIF to be. issued through ner:al channels.
P. Barry will respond.
4 The lead test at W11 was started on A;ril 25 at about 3:45 PM.
Presently, based upon a comparison of the measured elastic shortening versus the i
theoretical elastic shortening and the information from the Carlsen neters, the load at the tip of the piers is only a fraction cf the applied lead at tne top. It therefore, appears that the anti-friction liner is net functioning. The RGE and ESE are investigating the situation. In addition.
Sechtel's censultants have been netified and will be en-site en April 27.
5.
M. Elendy indicated that a FCR has been issued which allows cutting of selected rebar in the S'n'PS to allow installation of wells and/or piezoneters.
6.
M. Elendy indicated that an FCR has been issued to allow conpletion of the work en the connections of the six beams in the Auxiliary Building.
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DAILY INDEPENDENT ASSESSMENT TEAM MEET!NG Date: April 27, 1983 E
Attendees:
Bechtel Stone / Webster MFCAD OPCo E. Cviki A. Scott
- R. Sevo G. Murrav l
i D. Lavelle F. Barry l
M. Blendy P. Majeski l
J.*Kelleher Parsons J. Ratner i
4 I
1.
A plan for checking of concrete vibrators will be prepared by April 29 Following development of this plan a FCR will be prepared.
t 2.
Following the regular daily meeting, a meeting will be held to up-date interested persons on the progress of the test at W11.
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1 CAILY I!;0 EPI!;DE!!T ASSESSME!!T TEAM MEI!!!;0 i
l Date: April 25, 1983
- i Attendees:
Bechtel Stone / Webster M?"At CF0o l
D. Lavelle F. Barry R. Sevo G. Marray I
J. Fisher A. Scott E. Cviki P. Majeski l
M. Slendy l
J. Gaydos 1
Parsons J. Ratner I,
Bechtel performed a test of six concrete vibrators as part of the develep=ent 1.
of a procedure for checking the frequency of the vibrators. The frequency of the vibrators checked met the requirements of ACI 309 2.
The test at W11 remains at the 600 kip load, awaiting review with the NRO of the changes in the test procedures.
Contact with the appropriate NRC l
personnel could not be made on April 27 but it is believed centact would be made today. A copy of Sechtel's preliminary conclusions and recommendations 1-regarding the load test was given to the Team.
P. Barry asked if pier KC11 (which is currently shown as unreinforced on the 3
drawings) must be designed in a'ecordance with ACI 31E which would require that reinforcing steel be placed in the pier.
t.
P. Barry indicated that he wanted to clarify the purpose of the Assessment Team's participation at the Bechtel meetings in light er a general statement made
~
At this meeting 1
yesterday at the up-date meeting regarding the test at pier W11 I
a general question was asked whether there was any reason why the proposed test procedure changes could not be made and if all were in agreement with this course of action.
P. Barry stated that the Assessment Team's attendance was primarily to obtain information regarding on-going activities and not to approve any particular action.
D. Lavelle responded that he understood this and his wording of the previous day was not the best. However, he welcomes r
any participation by the Team at the meetings.
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Ap.-il 29, 1983 No Meeting held on this date.
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STONE & WEBSTER MICHIGAN, INC.
P.O. Box 2325. Boston. MAssAcHustTTs 02107 1
United States Nuclear Regulatory Commission May 18, 1983 Midland Site Resident Inspection Office Route 7 J.O. No.
14358 Midland, MI 48640 Ref. MPF 34 Attention Mr. R. Cook RE: DOCKET NO.
50-329/330 MIDLAND PLANT - UNITS 1 and 2 INDEPENDENT ASSESSMENT OF UNDERPINNING REPORT NO.
34 A copy of the Independent Assessment of the Underpinning Weekly Report No. 34 for the period May 8, 1983 through May 14, 1983, 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. In the Meetings attended portion of Weekly Repoat No. 32 the reference to a meeting with an NRC consultant is in error.
The reference should have been to a meeting with the Contractor's Consultant.
If you have any questions with respect to this report, please contact me at (617) 589-2067).
Very trul yours,
> ob &
I A. Stanley Lucks Project Manager Enclosures ASL/km i
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' J.O. No.
14358 3
i Midland Plant
+
Units 1 and 2 Independent Assessment of Underpinning i
Weekly Report No. 34 f
May 8, 1983 through May 14, 1983 Personnel on Site Stone & Webster Michigan, Inc.
ti S. Lucks 5/11 - 5/13 W. Kilker 5/9 - 5/14 P. Barry 5/12 - 5/14 A. Scott 5/9 - 5/14 B. Helsinger 5/12 - 5/14 Parsons, Brinckerhoff Michigan, Inc.
W. Parish 5/10 - 5/13 L. Silano 5/11 Meetings Attended i
i Date Represented Purpose 1
5/9 Stone & Webster Daily Meetings through Bechtel 5/13 Consumers Power Parsons 5/11 - 5/12 5/10 Stone & Webster Discuss Method Of Bechtel Determining The Exten Consumers Power Of Work Impacted by Issuance of A Non-Conformance Report 5/11 & 5/12 Stone & Webster Discussions of Pier Bechtel Load Test Data Consumers Power Parsons NRC 5/13 Stone & Webster Discuss Work Package Consumers Power Review Of Crillage NRC Beam Installation And General Concept of Work Package Overview Activities Construction -
j Pier'E11: Non-routine rejacking was performed in order to replace a driven wedge.
KC11 Drift: There was limited progress on the advancement or completion of this drift. The Contractor is considering eliminating or modifying drift sets and a reshore sesber since the entire ' face excavation is in concrete. Work is halted pending the processing of the change request.
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J.O. No.
14358 l,
Midland Plant Units 1 and 2 2
Independent Assessment of Underpinning 2
4 l
Pier E8: The work was limited to the installation of 3 ring lagging sets l
between approximate El. 570 & 574. Further work was delayed pending the 3
fabrication of the bell support steel.
Pier E10: The pier excavation and lagging was completed to approximate El. 575.
The excavated material was mainly clay fill to approximate El. 586 underlain by l
the natural clay till. Seepage into the excavation was very minor except during j
a temporary shut down of the pier E12 access pit susp pump on May 13 Once corrected, the pier seepage was quickly reduced.
t l
KC2 Drift: The firiger drift to the pier was excavated approximately 3 ft.
The l
i excavated face consisted of unreinforced concrete with an interbedded layer of j
soil fill.- The advance of the drift was halted pending the resolution of the proposed slope layback change.
i Pier W8: The pier excavation and lagging advanced from near El. 587 to El. 576 j
in the naturs1 clay till. Minor groundwater seepage continued to enter the excavation free near the fill clay interface. Work on this pier was halted j.
6 j
]
pending the fabrication of the ring sets and bell bracing steel.
l l
Pier W10: The pier was excavated and lagged to approximate E1. 580. During the l
l excavation of the fill asterial near El. 590 a void developed behind the pier W10 i
lagging between piers W10 and W11. The distance between piers W10 & W11 is 20 inches. Apparently a local zone of perched groundwater transported some of the j
j granular soil fill into the pier excavation resulting in a void of approximately
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one cubic yard. The work was halted and the void zone was prepared and grouted.
Since the grouting of a substantial number of the lagging spaces, grouncwater 4
i seepage has been einor.
j-West Access Pit: A small area of the layback west of pier W10 sloughed probably i
i due to rain water draining from the FIVP temporary shelter slough zone.
l SWPS: Two (2) piezoeeter wells (LS6 & LS12) and two (2) dowatering wells j'
(567 4 576) were completed and two (2) dewatering wells (555 & 561) were started.
j Quality Control Documentation and Records:
}
1.
Reviewed Non-fonformance Reports issued against drift sets in place.
!j 2.
Started a review of Non-Conformance Reports for potential trends and what action has been taken by the Contractor to solve any generic
]
problems.
Observations i
Construction - Construction activities were limited by a number of factors that I
affected various segments of the work. At the start of the week the work was
~'
halted for nearly one day in order to resolve concerns over Non-Conformance l
Reports issued on temporary drift supports. Later in the week progress on the KC2 and KC1.1 drifts was stopped pending resolution of change requests and the slope laybacks. Advancement on piers E/W8 was ourtail by the lack of sufficient
. approved bell bracing to sosplete the piers.- The Contractor demonstrated proper regard that the work be done in a procedurally correct manner. Bell excavations l
l were not started awaiting the release of atl bell bracing. This approach limits the exposure of the structure to risks associated with excavating the bell area.
t Nowever, the Assessment Team's on-going ooneern over the lack of availability of i
approved esterials and the timely resolution of Non-Conformance Reports and change l
requests continues. These concerns are currently being addressed by the Owner and the Contreeter.
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J.0 No.
14358 4
Midland Plant
')
Units 1 and 2 Independent Assessment of Underpinning 3
Quality Control, Documentation and Records - In Weekly Report No. 33 the Assessment Team expressed concerns over the issuance of QC hold-tags on parts of the underpinning temporsry support system that had already been put in-service. Meetings have been held between the Contractor and MPCAD to resolve this issue. It is imperative that (1) the programmatio requirements for dispositioning any such NCR's be fully understood and agreed upon by all of the groups within the Organization and (2) the NCR disposition cycle be streamlined to minimize delays in the underpinning work.
. Design Work Packages - The Assessment Team performed an overview of the design work packages relating to (1) the replacement of an existing fireline near the SWPS. (2) the installation of piers E/W 13/14 and the excavation of soil zones beneath the existing structures and the access shaft to El. 600. (3) the SWPS l
soldier beam installation and (4) a duct bank exposure near the auxiliary building. Questions raised by the Assessment Team are in the process of being I
resolved. The Assessment Team discussed the design package overview methodology i
I with the NRC representative. It was agreed the present overview approach ful.
fills the intent of the NRC request on work package overview.
Non-Conformance Identification Reports l
Status of previous issues (NIR numbers no longer listed have been closed-out.)
NIR No.
Description Opened)Date (Closed) j i
5 Concrete Mix 2/10/83 Qualification s
+
6 Lagging Spacers 3/21/83 7
Backpacking Material 4/5/83 in Wet areas-Pier W11 8
Load Transfer Method-4/5/83 ology - Pier E12 9
Release of Pier W9 4/13/83 for Load Transfer 10 Verification of 4/21/83 Vibrator Frequency
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DAILY INDEPENDENT ASSESSMENT TEAM MEETING 4
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Date May 9, 1983 1
i Attendees Bechtel Stone / Webster MPQAD CPCo l
j C. Murray i
E. Cviki W. K11ker l
J. Gaydos l
J. Fisher l
D. Live 11e i
I M. Blendy i
p.
1.
J. Fisher explained that the field work will likely be terminated until there l
1s a clarification or understanding on the status of the effect of issuing NCRs on a particular item and the impact on subsequent work. At the present time, there are numerous hold-tags in the drift and sier excavations that have not been dispositioned. WQAD, Field Engineering and Resident Engineering will convene to resolve the issue.
I 2.
J. Fisher reported the approval for the drawing restraining the fabrication of piers E/W9 ring beams and bell bracing has been obtained and fabrication l
l began on May 8.
3 W. K11ker stated the Assessment Tese continues to have eeneerne ever the time required to dispeettien of NCRs - particularly those asseetated the i
temporary support systes details. Thevarious project organisations must streamline the NCR issuenee/ disposition eyele in order to aveld the repeated
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delays tisas' continue te plague the work. In addition, the Tees feels there
, arg areas, again relating in particular to the toeperary support systes, where testneering clarification or definition of allowable tolerances could provide ran improved frasmark within which MPGAD oan perfore their inspections.
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4.". E. K11Est Ipederted that to.' ate the backpacking quality on pier W8 lagging d
- La good and that the inspeetten has been fee 111tated by the ineressed lagging spaeor sisd.
1 5
J. Gaydes'said that,FS0_is witherewing the proposed eonerete vibrater frequency verificanten procedure. GC will perfere this verifiestion by ineerporating f
the req 4Areso,rt in the proper precedure.
4 6.
B. Cviki reported that in order to evaluate the Tees questien en the thickness of the lever bearing plate unit,~ ductag the rejseking of pier W11 special r
attention was given to the jack- #4 and lower bearing installation. Engineering l
eeneluded/that th9 greater-thlehnese is the result of the original conditten l~
and,not related to t#g applies,tien of,9,he lead.
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Date May 10, 1983
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Attendeest 9echtel Stone / Webster MPQAD CPCo I
J. Gaydos A. Scott R. Sevo G. Murray 1.
J. Gaydos and R. Sevo stated that resolution of QAR on vibrator frequency verification will be closed.
2.
J. Gaydos advised that J. Fisher is addressing problesortime required to process NCRs.
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May 11,'t983
- y-Attendees:,
Bechtel Stone / Webster MPQAD CPCo J. Gaydos A. Scott R. Sevo' A. 1.ucks
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The Adelnistrative Guideline on Construch n Aid Procedure is in the
'l proc _ess of finak sign-out.
2.
The QAh tn'the concrete vibrator frequency verification has been completed.
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{AILY INDEPENDENT ASSESSMENT TEAM MEETING Date: May 12, 1983 i
Attendees:
Bechtel Stone / Webster MPQAD CPCo J. Gaydos A. Scott R. Sevo M. Blendy S. Lucks J. Fisher W. Kilker D. Lavelle E. Cviki l
Parsons P. Parish 1.
D. Lavelle reported that the guideline on Construction Aids was signed cut by FSO.
2.
J. Fisher reported that FSO and Engineering have assigned individuals to process NCRs to expidite the disposition process.
3 A. Scott questioned why the work was stopped on pier E10 near the end of the night shift when concrete was encountered near El. 590.
J. Fisher explained that the issue should have been resolved by contacting FSO to investigate the nature of the concrete and then issue a drill permit.
d 4.
W. Kilker questioned if the elimination of drift seu has been considered in areas where the drift sets are entirely in concrete.
J. Fisher replied l
that on KC11 the final sets will likely be eliminated after a change request j
is processed.
1 l
5 J. Gaydos reported that the concrete testing on the mud-mat pours will be j
i streamlined once a change request is approved.
6.
J. Fisher reported that on pier W10 a void h2d developed overnight behind the lagging between 6 ft. and 12 ft below the surface. Granular fill moved into the excavation along with perched groundwater. The size of the void was limited by the relatively sma11' extent of granular fill. The Subcontractor is in the process of pumping the water out and preparing the pier.for grouting the void space.
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DAILY INDEPENDENT ASSESSMENT TEAM HEETING l
Date May 13, 1983 l'
l Attendees:
Bechtel Stone / Webster MPQAD CPCo J. Gaydos A. Scott R. Sevo G. Murray J. Fisher W. Kilker D. Lavelle E. Cviki 1,
J. Fisher and D. Lavelle said the organization is continuing the effects to expedite the conditional release process where applicable.
2.
J. Fisher advised that the void that developed at pier W10 has been grouted.
3 There was a general discussion of how the implementation of the proposed change l
to eliminate the slope lay-backs will be initiated.
4 J. Fisher reported that the pier KC2 drift has been shut down pending the resolution of the slope lay-back issue. KC drift is awaiting the resolution of an FCR on re-shoring.
i 5.
Pier W8 will not advance until ring sets are ready. Projected date is May 16.
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p/RA SCS f,3 STONE & WEBSTER MICHIGAN. INC.
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P.O. Box 2325 Boston MASSACHUSETTS 02107 DE ML l
LOL FILE IS /
i United States Nuclear Regulatory Commission April 27, 1983 i
Midland Site Resident Inspection Office j
Route 7 J.O.
No.
14358 Midland, MI 48640 Ref. MPF 31 Attention Mr. R. Cook RE: DOCKET NO.
50-329/330 MIDLAND PLANT - UNITS 1 and 2
[
INDEPENDENT ASSESSMENT OF UNDERPINNING REPORT NO.
31
)
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A copy of the Independent Assessment of the Auxiliary Building Underpinning Weekly Report No. 31 for the period April 17, 1983 through April 23, 1983, 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 questiens with respect to his report, please contact me at (617) 589-2067).
Very truly yours, CM-g j
A. Stanley *ucks i
Project Manager Enclosures ASL/ka i
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J.O. NO.
14358 Midland Plant
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, Units 1 and 2 Independent Assessment of Underpinning Weekly Report No. 31
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April 17, 1983 through April 23, 1983 i
i Personnel en Site Stone & Webster Michigan, Inc.
W. Kilker 4/18 - 4/23 A. Scott 4/21 - 4/23 P. Barry 4/18 - 4/20 A. Lucks 4/19 4/21 Parsons, Brinckerhoff Michigan, Inc.
l P. Parish 4/18 - 4/22 l
Meetings Attended Date Represented Purpose
{
4/18 Stone & Webster Daily Meetings through Bechtel 4/22 Consumers Power J
Parsons (4/19 - 4/22) 4/21 Stone & Webster-
" Dry-Run" Pre-Bechtel sentation of Lead /
I Consumers Power Settlement Data l
Hergentime
)
Activities Construction -
Pier W12: No activity.
Pier W9: No activity.
Fier W11: "The upper and lower leveling plates were installed and grouted. Bearing plates,jackstand, and jacks were placed and the Carlson meter electrical connections and telltale plates, box and dial gauge installations were completed. Ihe pier is essentially ready for load transfer.
Pier W8 drift: Excavation and support of the drift advanced to within 6 ft. of completion. The excavated material consisted of approximately 2 ft. of unreinforced-concrete underlain by clay fill with some zones of sand fill.
Pier E12: Routine rejacking based on structure movement was initiated on April 22.
The 110 percent of specified load was re-established by active jacking at which time a loosening of the driving wedges required that the 0.01 inch per 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> deflection criteria be satisfied by maintaining active jacking.
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J.O. 'NO.
14350 Miditnd Plcnt r
I J' nits 1 and 2 Independent Assessment of Underpinning 2
Pier E9: Routine rejacking based on structure movement was initiated on April 22.
The procedure followed and results obtained were similar to those at pier E12.
Pier E11: The lower leveling plate bearing plates, telltale bearing plate, box and dial gauges, jackstands and jacks were installed. Load transfer was initiated on April 23 Pier E8 drift: The drift excavation was completed. Installation of the final drift set was completed on April 23 The excavated material consisted of 2 ft.
of unreinforced concrete underlain by clay fill. An abandoned well screen and a deep seated benchmark casing were encountered near the west limit of the drift f
excavation.
Service Water Pump Structure: Granular backfill was placed and compacted to permit equipment access. Two exterior probe holes were then completed and grouted. The completion etcoring the concrete floor slab for dewatering wells is delayed pending Engineering resolution of reinforcement bar interferences.
l Auxiliary Building Bea= Fix: The major portion of the beam connection modifications j
at El. 646, 659 and 704 were co=pleted.
Quality Control, Documentation and Records:
1.
Witnessed QC inspection of dry-pack grouting the upper level bearing plate at pier W11.
2.
Witnessed the QC inspection of Hilti bolt holes along a portion of pier E8 drift.
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2; 3
Observed the verification survey of centerline of pier W11.
4 Witnessed QA/QC sign-off inspection at pier E11 prior to load transfer.
Observations Construction
.The installation of bearing plates, jackstands and jacks at piers E/W11 was done in a satisfactory manner. The E/WB drift excavations were properly advanced and supported. Progress was frequently slowed by the curing time required for grout placed in abandoned Hilti bolt holes.
The rejacking operations at piers E9 and E14 and the initial load transfer at pier E11 were properly executed. The response of the load level at pier E12 during the rejacking of E9 and of load levels at both piers E9 and E12 during the leading of pier E11 demonstrated the sensitivity and interaction of the pier system to the applicatien of loads up to 33 ft. distance.
Quality Control, Documentation and Records - The Team observations of the QC activities indicated the inspections were being properly done. The response of the field organization to the turbine building settlement near pier E8 was in accordance with procedural requirements.
The Assessment Team received a response to NIR #6 concerning the spacing requirements for pier lagging sets. In summary, the response stated that the Contractor has agreed with the Subcontractor to use the sider spacers conditions permitting. How-ever, no change would be made to the procedure. The Assessment Team appreciated the concern of the Contractor to changing the procedure. Nevertheless, it is i
our opinion that wording could be incorporated into the procedure that would assure the use of wider spacers unless certain dimensional orground conditions dictate l
otherwise.
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Midltnd Pltnt Unita 1 cnd 2 3
s
,ndependent Assessment c. Underpinning 3
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I The Assessment Team issued NIR #10 concerning the testing of the frequency of concrete vibrators. ACI 309 requires that concrete vibrators should be checked in concrete. The Contractor has been testing vibrators in air.
Design Work Packages - The Assessment Team performed an overview of the design work packages for the auxiliary building beam fix, the UAT modification and the 4
E/W8 grillage beam installation. The auxiliary building beam fix and UAT packages were judged to be complete. With respect to the grillage beam installation, it I
was recommended that an additional existing construction procedure and instrumentation procedure be referenced in the work package summary, and one signature block had not been signed on the installation procedure.
Non-Conformance Ident"ification Reports Status of previous issues:
(NIR numbers no longer listed have been closed-out.)
j NIR NO.
Description Date 1
(Opened)
(Closed) 5 Concrete Mix 2/10/83 Qualification 6
Lagging Spacers 3/21/83 f
7 Backpacking Material 4/5/83 in Wet areas-Pier W11 8
Lead Transfer Meth-4/5/83 odology-Pier E12 i
9 Release of Pier W9 4/13/83 for Load Transfer
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10 Verification of 4/21/83 Vibrator Frequency I
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rn DAILY INDEPENDENT ASSESSMENT TEAM MEETING Date: April 18, 1983 l
Attendees:
Bechtel Stone / Webster MPOAD CPCo E. Cviki W. Kilker R. Sevo G. Murray J. Fisher P. Barry J. Gaydos I
1.
J. Fisher reported the auxiliary building beam fix has been started.
2.
A general discussion was held on the drift set Hilti bolt installation impact en time needed to advance the drifts to the respective piers.
At most drift set plate locations, the Subcontractor has been required to l
drill numerous additional holes due to encountering steel before full penetration was achieved. The abandoned holes require grouting and cure j
t time before torquing the successful holes.
3 In response to an earlier inquiry (see notes of April 14) by P. Barry on the NCR on a drift set in pier E12, J. Fisher stated that FSO has dis-positioned it.
4.
W. Kilker presented written inquiry on the load transfer interaction effects t --
on adjacent piers. See attached sheet.
J. Fisher will arrange for a separate discussion session with the Subcontractor.
I 5.
J. Fisher stated he will measure wedges on E/W9 piers and report on use of various sizes.
6.
In response to an earlier observation (see notes of April 15) by P. Barry, J. Fisher said that routine rejacking in the future will not necessarily result in a jack load reduction as was done on the April 14 rejacking of pier W9
]
7.
P. Barry discussed the Assessment Team observations on the UAT work package.
A question arose if any grouting of the soil outside the pipe is anticipated prier to opening the pipe wall. If so, the work package submittal may need revision.
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r as.s As per specifications it appears that inadverten unicading of ;iers due t:
the leading of an adjacent pier is prevented by the criteria that requires I
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.01 inch in a c:r. tin;0us 4" l
reja:%ing at piers when the settle:ent exceeds This Oculd nean hewever, that while a pier is being icaded h:ur period.
adjacent piers nay require rejacking at the sane tine and pessibly affect the 1
a :eptance criteria of Icad transfer for the pier being installed. This would i
l be critical entre adjacent piers are clese and/ r have areas of over'a;;ing i
I pressures.
Will the lead on piers adjacent to a pier undergo,ing initial lead transfer te =aintained by active jacking or will the application of a. rejacking
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- s Icad to these piers be deternined by the deflection criteria?
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DAILY INDEPENDENT ASSESSMENT TEAM MEETING Date: April 19, 1983
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Attendees:
Bechtel Stone / Webster MPQAD CPCo E. Cviki W. Kilker W. Lytle G. Murray J. Fisher P. Barry J. Gaydos Parsons P. Parish 1.
J. Fisher stated the meeting with Mergentime on the effect of jacking on
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adjacent piers will be scheduled for the week of April 25.
i l
i 2.
J. Gaydos reported that on piers E/W9 all driven wedges were originally 4 ft. long. However, interferences with drift sets required cutting of the I
ends after they were driven.
3 J. Fisher stated that Resident Engineering had informed him that the UAT work package would not require a change since no grouting will be done prior to opening the pipe wall.
t 4
W. Kilker stated he met informally with J. Northrup.
J. Northrup reported making progress in both clarifying inspection requirements and changing the i
welding requirements particularily on lagging and telltale boxes.
1 i
5.
W. Kilker reported the Assessment Team had received a response from FSO on.
NIR #6.
G. Murray requested a copy for CPCo in order to facilitate tne close-out of the item.
W. Kilker will report on the response within a day or so.
6.
E. Cviki said that to his knowledge no QARs had been issued on the Assessment Team NIRs 6, 7 or 8.
W. Lytle will investigate..
7.
P. Parish questioned if the design considerations had taken into account the extent of "open-area" under the turbine building that now exists.
J. Fisher said Mergentime had verified with Project Engineering last month that the situation had been anticipated and analyzed.
8.
E. Cviki reported.that a roof crack in the northwest portion of the SWPS had reached a width of 33 mils and that as an action the investigative agency was being alerted to perform an evaluation.
9 J. Fisher questioned if the Assessment Team had any concerns about the sampling -
of concrete at the end of the pumpline.
W. Kilker and P. Barry replied that the sampling. location does not concern the Team from a quality standpoint.
Any opinions expressed by the Team to date on concrete sampling locations were from the standpoint of logistics and expediency of the cperation.
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' 10.
E. Cviki reported that Project Engineering is responding to.the question of I
checking the vibrator frequency in air versus in concrete.
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DAILY INDEPENDENT ASSESSMENT TEAM MEETING l
t Date: April 20, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo
^
J. Fisher W. Kilker R. Sevo J. Gaydos P. Barry S. Lucks Parsons P. Parish e
1.
J. Fisher stated that with respect to the UAT work package it has been determined that Mergentine will cut the pipe access later. The present work package will not include that activity.
2.
R. Sevo requested a clarification on recently expressed Assessment Team concerns about concrete sampling.
P. Barry and W. Kilker indicated that end of the pumpline sampling is of no quality concern to the Assessment Team.
3 P. Barry said he had discussed his comments on the constructability package for grillages at piers E/W8 with FSO.
4 J. Gaydos responded to an earlier concern over the driving wedge length j
used at piers E/W9. All wedges conformed to the drawing requirements when driven but were later cut-off as required to avoid interfences with drift sets.
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DAILY INDEPENDENT ASSESSMENT TEAM MEETING Date: April 21, 1983 I
Attendees:
Bechtel Stone / Webster MPQAD CPCo J. Gaydos W. Kilker R. Sevo G. Murray i
E. Cviki S. Lucks Parsons P. Parish 1.
W. Kilker advised that the FSO response to NIR #6 on lagging spacers had been received. The response stated that in general the Subcontractor had been advised, in general, to use the wider allowable spacing. The Team is in agreement with this recommendation but feels the procedure should be changed to reflect the recommendation. NIR #6 will remain open.
2.
G. Murray related that based on a recent discussion with the NRC the pier load test at W11 maybe delayed. The work permit for performing the load test has not been signed off by the NBC.
l_
3 E. Cviki reported that since last evening (April 20) the turbinebuilding, j'~
as monitored by the deep-seated benchmark nearest to pier EB, has undergone a few mills settlement and that further settlement will necessitate rejacking a pier E9.
4.
E. Cviki said the Resident Engineering group will meet to discuss presentation
- j of data proposed for the NRC durind their site visit next weck.
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DAILY INDEPENDENT ASSESSP.NT TEAM MEETING l
Date: April 22, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo E. Cviki W. Kilker R. Sevo J. Fisher A. Scott J. Gaydes l
Parsons l
4 P. Parish 1.
E. Cviki reported E9 and E12 piers will be rejacked today because a turbine 2
building benchmark indicated the deflection criteria had reached the action level.
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2.
J. Fisher said the benchmark pipes will be protected in the excavation fron the construction operations.
3 E. Civkl said Engineering will establish the criteria for testing the concrete vibrator and forward this to QC.
4 There was a general discussion of the work released at the UAT.
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STONE & WEBSTER MICHIGAN, INC.
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P.O. Box 2325. BosTUN. M AssACHusETTs 02107 l
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l United States Nuclear Regulatory Commission April 21, 1983 Midland Site Resident Inspection Office J.O. No.
14358 Route 7 Midland, MI 48640 Ref. MPF 30 i
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Attention Mr. R. Cook l
RE: DOCKET NO.
50-329/330 l
MIDLAND PLANT - UNITS 1 AND 2 INDEPENDENT ASSESSMENT OF AUXILIARY BUILDING UNDERPINNING REPORT NO.
30 A copy of the Independent Assessment of the Auxiliary Building Underpinning Weekly Report No. 30 for the period April 10, 1983 through April 16, 1983, 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.
Very truly yours.
1 A. Stanley Lucks Project Manager i
Enclosures i
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J.O. NO.
14338
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T Midland Plant Units 1 and 2 Independent Assessment Auxiliary Building Underpinning Weekly Recort No. 30 l
April 10. 1933 through Aer11 16. 1993 l
Personnel en Site Stone & Webster Michigan, Inc.
W. Kilker 4/14 - 4/16 i
B. Helsinger 4/11 - 4/16 I
A. Scott 4/11 4/14 P. Majeski 4/11 4/13 P. Barry 4/11 - 4/16 Parsons, Brinckerhoff Michigan, Inc.
V. Madill 4/12 4/15 Meetings Attended Date Represented Purecse 4/11 Stone & Webster Daily Meetings through Bechtel 4/15 Consumers Power Parsons (4/12 - 4/15) 4/15 Stone & Webster Weekly Project i
Bechtel Soils.*!eeting l
Consumers Power 8
Mergentime Activities Construction -
Pier W12: Routine rejacking of toe pier was not required daring this weer.
Total pier settlement to date is on the order of 0.25 inches.
Pier W9: The wedge lock-off was accomplished on April 13 Total pier deflection to date is approximately 0.4 inches. Routine rejacking was done on April 14.'
}
Pier W11:
Reinforcing steel, telltale rods, and the lower level Carlson meters were installed and concrete was placed to E1.'597 on April 14 The re=aining reinforcing steel and upper. level Carlson meters were then installed and the pier concreting was completed on April 16.
Pier W8 Drift: The 9
- t. long section of N-S drift adjacent to pier W9 and 10 ft. of the E-W segment of the drift to.the south of pier W9 were completed.
The excavated material consisted of a 1-2 ft. thickness on unreinforced concrete underlain by clay backfill.
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J. O. NO.
14358
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Midland Plant
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Units 1 and 2 Independent Assessment Auxiliary Building Underpinning 2
i Pier E12: Routine rejacking of the pier was not required during this wee <.
Total pier settle =ent to cate is approxi=ately 0.25 inenes.
j Pier E9: Initial lock-off of the load to the wedges was done on April 11 i
Routine rejacking of the pier was performed on April 12.
Pier Ell: Reinforcing steel and telltale instrumentation were insta11ec anc the pier shaft concretingwas completed on April 13 The upper leveling ;1 ate was installed and dry-pack grouted and tne upper bearing plate was installec.
Moist curing of tne pier surface continued throughout the week.
Pier ES Drift: The drift excavation proceeded to approximately the same point as the pier W8 drift. The excavated material consisted of a 2 ft. thickness of unreinforced concrete underlain by clay backfill.
l Cuality Control. Documentation and Records:
1.
Reviewed selected MPCAD NCR's for procedural ecmpliance.
2.
Witnessed concrete testing for pier E11 shaft concrete placement.
i 3
Witnessed placement, vibrating and testing of pier W11 concrete ; initial placement to El. 597).
4 Reviewed data used as a basis for development of the dry-pacx grout testing procedure.
Observations 3
l Construction - The routine rejacking of piers E/W9 was carried out satisfactarily.
The field personnel put considerable effort,inte driving the wedges to insure full load transfer to the pier prior to jack lead release. The Assessment Team expressed a concern over irregularities in the shape of some of the. driving wedges that have been used to-date. The wedge shape should be such that full bearing is achieved along the wedge once it is driven. The Contractor has taken steps to insure that j
the bearing surfaces of the wedges will be flat by specifying a tighter tolerance.
PiersE/411 were completed in accordanet with the procedures and good industry practice.
Quality Control, Documentation and Records
- With two exceptions MPQAD had properly initiated, issued, tracked, and closed the Non-conformance Reports (NCRs) that were reviewed by the Assessment Team. In one' case, the Assessment Team noted the need for additional documention on the. inspection report form associated with the issuance of an NCR on the vibration of concrete. In another case, an NCR on concrete placement at one of the piers was not disp'aitioned prior to release for load transfer (Refer to Assessment Team NIR #9). However, the QC inspector was fully aware of the resolution of the technical concern prior to the load transfer.
The concrete testing and concrete placement procedure observed at piers E/W11 were in' compliance with the project documents. The Team review of the data used in developing the dry-pack grout testing procedure indicated an adequate basis for developing the procedure.
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J.O.
NO.
14358
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Midland Plant Units 1 and 2 1
Independent Assessment i
Auxiliary Building Underpinning 3
As referenced in the Assessment Team Weekly Report No. 29, the Team continued the assessment of the shop welding of underpinning materials. In a:dition t0 dis:ussiens with the Contractor's weldir.g engineers and a review of the welding procedures.
the assessment included inspections and evaluations at the Subcontractor's fabricatien The evaluation of selected welded materials indicated the welds were Of shop.
high quality. A number of tne observed welds had been rejected by the OC ins;e: tion However, it is the Assessment Team's opinion that the rejections were process.
generated by a very vigorous interpretation of the welding code and procedures and i
do not reflect signific' ant weld defects. Entire lots of fabricated materials con-sisting of several individual pieces are presently being " held" if a single p'*:e is rejected. In order to expedite tne release process, the Contractor may wantto ::nsi:er redefining the lot size of work to be inspected. The prequalified welding procedures l
are taken directly from the AWS code. Code information is therefore fully included.
However, considering the nature of the welding (mostly fillet welds) the qualification Tea:
could be presented in a less complex manner. As stated in the previous Assessnent j
welding evaluation, active participation of the Project Engineering gr:ap is crucial i
to the efficient functioning of the welding fabrication. Weld designs snould be i
reviewed in lignt of field fabrication and inspection experiences.
I Non-Conformance Identification Reports j
Status of previous issues:
(NIR numbers on longer listed have been closed-out.)
NIR NO.
Description Date (Opened)
(010se )
Concrete Mix 2/10/83 Oualification 6
Lagging Spacers 3/21/83 7
Backpacking Material 4/5/83 in Wet areas-Pier W11 8.
-Load Transfer Meth-4!5/83 odology-Pier E12 9
Release of Pier W9 4/13/84 for Load Transfer
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7 DAILY INDEPENDENT ASSESSMENT TEAM MEETING 3
Date: April 11, IcS3 Attendees:
Bechtel Stone / Webster MPCAD CPCo I
J. Fisher A. Scott R. Sevo P.. Wieland i
E. Cvikl.
P. Majeski J. Gaydos l
1 J. Fisher indicated that an FCR has been written to permit excavation of the drift to E/W8.
2.
J. Fisher indicated that the initial concrete pour at pier W11 Will be cc:pleted to just below the upper level of Carlson meters (about 7 ft. frc= tc;,.
3 A. Scott expressed a concern that the joint tape on the anti-fricticn liner
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is loose.
J. Fisher replied that the condition will be corrected bef re
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concrete placement.
4 A discussion was held concerning soil unravelling at pier Ell.
The miner seepage was apparently sufficient to cause unravelling of the soil in the bell area prior to and during concrete placement.
P. Majeski expressed a concern that 'Qnravelling cccurring during concrete placement could go undetected and that stabilizing the bell area before hand is important.
J. Fisher i
stated that keeping water from the bell area is important anc that efforts
.I to contain and remove the water before reachir.g the bell have been done and will be repeated or expanded in future tells to try to avoid tne condition in pier E11.
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DAILY INDEFENDENT ASSESSMENT TEAM MEETING l
Date: April 12, 19S3 e
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Attendees:
Bechtel Stone / Webster MFOAD c?::
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E. Cviki P. Majeski J. Shah D. Puhalla J. Gaydes A. Scott 9
P. Barry i
1.
A. Scott indicated that the slump of the concrete for the placement of the bell of E11 on April 9 was erratic. He suggested that the procedures used by the supplier be reviewed (particularly with respect to the water content of the aggregate) to determine the cause of this problem.
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6 DAILY INDEPENDENT ASSESSMENT TEAM MEETING l
4 Date: April 13, 1933 Attendees:
Bechtel Stone / Webster MPCAD CPCo E. Cviki P. Majeski G. Carpenter R. Wheeler J. Kelleher A. Scott R. Wieland i
P. Barry Parsons V. Madill 1.
R. Wheeler stated that he and J. Meisenheimer had the opportunity to discuss the Construction Aid Procedure, " Administrative Guideline" FIU. 1.100 and plan to meet with D. Lavelle concerning whether this guideline is required or not on April 14.
In R. Wheeler's opinion construction aids should be so noted on the drawings.
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2.
R. Wheeler stated that when CPCo documents the technical items presented g
to the NRC via telephone conversation the NRC may permit er.cavation on E/W8 piers to the elevation of the top of bell or ring support.-
3 In reference to A. Scott's concern on the inconsistent characteristic of concrete slump, Jim Kelleher reported that, as an initial step, the moisture test performed on the aggregates would be performed in the morning of.the batching of concrete to insure that the latest condition is reflected in the j
mix paccortion.
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P. Barry reported that the Assessment Team had issued NIR #9 An NCR writter, j
on the pier W9 concrete placement has not been dispositioned. Conditional i
release te ccmolete.the pier had teen given but not to perform the load
.j trans fer. In addition,- P.
Barry reported having difficulty in.lecatirg 4
in FSC & MFQAD the initial conditional release for the ccncrete placement.
6.
F. Majeski questioned if,there were plans to chart or detail the settlemer.t of piers particularly with respect to.the effect of loading a pier en in-place adjacent piers. The concern is -that the load oon the in-place piers be maintained during the. jacking of an adjacent pier (s).
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Cviki will respond.
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DAILY INDEPENDENT ASSESSMENT TEAM MEETING i
Date: April 14, 1993 1
Attendees:
Bechtel Stone / Webster MPCAD CPCo E. Cviki W. Kilker G. Murray 1
J. Fisher Parsons V. Madill
- 1. J. Fisher reported that MPQAD has issued a conditional release to perform rejacking of pier W9.
- 2. V. Madill stated that the load trcnsfer wedges on piers E/W9 have differer.
details (lengths and thicknesses) than what he interprets fro = the drawings.
j J. Fisher will respond.
- 3. v. Madill questioned irregularities along the surface of some of the load transfer wedges.
J. Fisher stated that a new supply of wedges are on order.
- 4. P. Barry asked about the status of the NCR on the drift set installation at pier E12.
J. Fisher will respond.
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_,l DAILY INDEPENDENT ASSESSMENT TEAM MEETING Date: April 15, 1983 Attendees:
Bechtel Stene/ Webster MFOAD OF:
E. Cviki W. Kilker R. Sevo J. Mo0ney J. Fisher P. Barry J. Schaub J. Gaydos B. Helsinger Parsons V. Madill 1.
J. Fisher reported that approval has been obtained fect the NCE t0 perf0r-j the auxiliary building beam fixes. Work will began inmediately.
1 2.
P. Barry stated that on April 14 he witnessed the rejacking of pier W9.
'f The field personnel put forth considerable effort in driving the 'de ges j
resulting in a load reduction in the jacks of nearly 20 percent prier to release of the jack pressure.
i 3
J. Fisher said the forecast date for W11 lead transfer is April 21.
4 There was a general discussion of the interactive effect betweer. a pier being i
loaded an the potencial rejacking of adjacent piers.
J. fisher requeste: the Assessment Team submit any specific questions on this subject to allee FSO i
to prepare proper respense.
5.
B. Holsinger questioned if the concrete vibrators are frequency tested in air j
or in concrete.
J. Fisher and E. Cviki will respond.
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STONE & WEBSTER MICHIGAN, INC.
l P.O. box 2325. BOSTON. massachusetts 02107 l
t United States Nuclear P:gulatory Commission April 15, 1983 Midland Site Resident Inspection Office Route 7 J.0 No.
14358 i
Midland, MI 48640 Ref. MPF 29 Attention Mr. R. Cook l
l RE: DOCKET NO.
50-329/330 MIDLAND PLANT - UNITS 1 and 2 INDEPENDENT ASSESSMENT OF AUXILIARY BUILDING UNDERPINNING REPORT NO. 29 A copy of the Independent Assessment of the Auxiliary Building Underpinning Weekly Report No. 29 for the period April 3, 1983 through April 9, 1983, is e
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.
Very truly yours, l-9
'2. J p)s a
ma uI %,%K A. Stanley Luexs Project M2r.ager Enclosures AS'. /ka i
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'J.O. NO.
14358 s
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Midland Plant Units 1.and 2 Independent Assessment Auxiliary Building Underpinning s'
Weekiv Repert No.
2_9__
Acril 3, 1983 through April 9, 1o23 Personnel en Site Stone & Webster Michigan, Inc.
t W. Kilker 4/4 4/7 L. Rouen 4/4 - 4/6 A. Scott 4/4 4/9 I
P. Majeski 4/4 4/9 Farsons, Brinckerhoff Michigan, Inc.
j J. Ratner 4/4 4/8 Meetings Attended 4
Date Recrosented Pur:ese t/4 Stone & Webster (4/9 4/E)
Daily Meetings through Bechtel 4/6 Consamers Power Parsons l
4/7 Stene & Webster Freser.tttien on 52chtel Grillage 5ea:
Censumers Fower Insta11atien Procedur Mergentime j
Parsons 4/6 Stene & Webster Weekly Freject 5echtel Soile Meeting Consumers Fewer
+
Mergentime Activities Censtruction -
Pier W12: The Conttactor continued to monitor the pier settlement and check the shims for tightness. This pier has been rejacked once since the nandatcry rejackings were completed. Approximately 5 milslof structure movement were noted at pier W12 during jacking of pier W9 Pier:W9: Initial load transfer was accomplished on April 5.
The active jacking mode at 110 percent of specified load began on April 6 and continued thru the end of the week. Deflection of the bottom of the pier was approximately 0.3 inches as of April 9 while elastic shortening of the ple a.was on tne order of 0.05 t
inches. Upward movement of the turbine building,' as measured by a nearby deep -
seated benchmark, was on the order of.02 inches.
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'J.O.
NO.
14358
-s e-Midland Plant
-Units 1 and.2 Independent Assessment 2
Auxiliary Building Underpinning i
Pier W11: Excavation of the pier was completed and the plywoo'd sheathing anti-friction liner installed. The seepage into tna excavatien was rsduced by 1
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grouting the majority of the lagging spaces below the fill-natural soil interface.
Installation of reinforcement started on April 9 i
The Contractor continued to monitor the pier settlement and check the I
Pier E12:
shims for tightness.
Pier E9: Initial load transfer was accomplished on April 4 The active jacking l
- ode of 110 percent of specified lead began on April 4 and continued tnrougn the Deflection of the bottom of tne pier was ap;rexicately C.25 inches end of the week.
as of April 9, while elastic shortening was about 0.04 inches. Uplift cf the on the order of.03 inches as measured by a nearby benchmark.
turbine building was i
a Pier Ell: Excavation of the pier shaft and bell was coroleted.
Water seepage entered the excavation over the weekend of April 2-3 due to a shutdown of the sump pump in the access pit.to pier E12. Once pumpirs resumed, the se'epage was virtually eliminated. However, even this minor amount of seepage caused the soil material in the bell area to begin unravelling. After bracing and supporting the long side of the bell area, the Contractor elected to concrete the bell.
During concrete placement serveral additional cubic feet of soil collapsed. The soil and contaminated cenerete were removed and the bell pour was completed.
Ouality Centrel. Documentation and Fecords:
1 Evaluated the proposed engineering response to the NOR written con-cerning a; proval of concrete mix C5-0.
2.
Feviewed preliminary copies cf inspecticn reparts for: pier E/W9 tell area cencrete place =ent, pie-E9 reinforcing installation, over-inspecticn
,I for ;ier E/W9 reba _=~'***- snt olacement, and ever-inspection fer j
pier EiU9 concrett eleczent.
Observations Constructien'- The load transfer a:tivitii.s at piers E!W9 were performec in a timely and satisfactory manner. The rejacking operations centinue te be of
~j some concern tc the Assessment Team. The wedges should be driven' tight enough.
to lift a significant portion of. the lead off the jacks in order to insure f all building 1 cad transfer to the piers. Also, the Team has observed so=e irregularities in the sice and taper of the steel wedges. The quality of the wedges should be improved to insure full and uniform bearing.
Concerns of the Assessment Team with regard to backpacking operations led to a j
meeting at the pier E11 excavation on April 7 attended by representatives-of the: Contractor, Subcontractor and Resident Engineering. Specifically the Assessment Team concerns were:
(1) over the use of fine sand in areas of seepage and (2) the effect of narrow lagging spacing and full-backpacking of tne louver space between lagging sets on _the final quality of backpacking and the ability sto adequately perform an inspection. It is the opinion of the Assessment ~eam that the quality of future backpacking'would be improvec by the use of a mere
> appropriately graded material for wet conditions and that the lagging spacing should be wide enough to permit easier placement of the backpacking material i'
-and inspection of.the final product. Also, the packing of the louver spacing between lagging serves no useful purpose and may actually encourage arching of the soil behind the lagging as well as impeding inspection.
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J.D.
NO.
14358 j
Midicnd Plcnt
. )
Units 1 and 2 i
Independent Assessment Auxiliary Building Underpinning 3
t i
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The Centracter displayed good judgment in supporting the tell area of pier Eli and in electing to concrete the bell area prier to readying the pier shaft for concrete. Delays would have resulted in the further soil unravellir.g and the need for more sheeting support. The Contracter's reaction to the collapse of additional soil during concrete place ent was appropriate resulting in a l
satisfa. tory pier bell.
Cuality Centrol. Documentation and Records - The concerns of the Assessner.t Tea
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stated in NIR #5 were adequately addressee by the proposed Project Engineering The NIR will be closed pending closure of the corres;cnding MP:A NCE.
j respense.
1 The inspection reports reviewed by the Assessment Team adequately document cct-pliance with the applicable procedures.
I i
Ncn-Confor=ance Identification Reoorts i
j Status of previous issues:
(NIR nu=bers on lenger listed have been closed-I cut.)
l NIR NO.
Description rate (Opened)
(Closed) 5 Concrete Mix 2/10/63 Qualification 6
Lagging S;acers 3/21/63 t.
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7 Backpacking Material 4/5/83 in Wet arcas-Pier W11 E
Lead Transfer Metnodelesy 4l5!51 i
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DAIL.Y INDEPENDENT ASSESSMENT TEAM MEE!!NO l
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Date: April 4.
1983 W
.'s Attendaea*
techtel Stone / Webster.<
MFOAD C?Ce l
R. Seve E. Wieland I,
. E. Cviki f, J.'Caydos.
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i J. Ratner l
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E'. Cviki will discuss with R. Oliver of MPCAO the engineering response te t$i Q'AR on'the concrete six design.
2.
E.JviIl reported that load transfer en pier E9 began today. Pier W9 load j
transfer is' expected on April 5.
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.3 The Merger.ti=e presentation on grillage bean installation is scheduled for i
- this weed r
The results of the drypacx grout sanple testing en piers E/W9 leveling plates t
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w'ill be availatle today.
J. Gaydes will su;;1y.
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- 5. 'J..:Eatner ques.icned why in tackpacktrg, the miterial is packed nearly cut l
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to tne frer.t. face of the lagging since t.9e inspectfor,cf tre ccr.ditier.s s
tenind tne sheets is nintered ty this naterial. FSO wi".1 respend.
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E. 0vik!.peported that Project' Err;ineerir.g feels as-built' drawings of the structural co=ponents of tne underpinning are not recuired as long as things are done witnic documer,t tolerances and that changes are covere.1 ty FCRs
.;and CONS. However, soil'fcuneation condition descriptio.3 are required as l
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s "close-out" of the underpinning werk.
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7.-' J. Ratnet",tuentioned why a certain percentage (on the Order cf 10-15 ;ercent) of the jack load is not picked up by.the wedges during the rejacking' operations s '
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j as is in keeping with good-underpinning practice.
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i DA!LY INDEFENDENT ASSESSMENT TEAM MEETING Date: A;rli 5, 1983 f
i Attendees:
Bechtel-Stone / Webster M?OAD CPCe J. Fisher A. Scott R. Sevo D. Puhalla i
E. Cviki L. Rouen
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J. Gaydos
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Parsons i
J. Ratner
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1.
L. Rouen has contacted E. Cviki concerning concrete mix C-50.
Resciution of the Project Engineering response on the NOR will be handled by E. Oviki and R. Oliver.
2.
The Assessment Team will be informed of the time for review of installation plans for the grillage beams at pier 6 by Mergentime some day this week.
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3 J. Fisher stated that E9 pier load transfer was in the phase of.01 i
l settlement per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and this limit should be attained by temorrow
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morning. Load transfer-for W9 pier will start today.
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J. Gaydos reported that'the drypack test cubes molded on March 31 shewed similar results for slab made cubes by b:th Mergentime and U.S. Testing-l for 1 and 3 day tests, but the 1 day test made by U.S. Testing lat en the ta:le were 20% lower than those made on slat.
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.5. ;J. Ratner reiterated that backpacking with fine sand in wet areas use not l
l goed underpinning practice.
J. Fisher te investigate why a:tien was n:t taken te correct.
4 i
1 6.
E/WS pier and drift design review package is to be given OP0c this weed l
upon receipt of Shop Drawings.
a-7.
D. Pulla11a supplied excerpts from the SSER which were market to indicate F
what was required in the way of detailed as-tuilts of the underpinning effert.
'J. Fisher stated that were keeping necessary records to satisfy t
the committments of the SSER,.FSO and Prejset Engineering.-
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DAILY INDE? INDENT ASSESSMENT TEAM MEETINO Date: April 6, 1963 - '.
w Attendees:
Bechtel' Stone / Webster MPOAD CFCo
-l J. Fisher-Lv Rouen R. Seve G. Murray E. Cvikl A. Scott
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J. Kelleher W. Kilker
'P. Majeski Farsens J. Ratner '
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E 1.
W. Kilker advised that the disapproval of the FCR on the concrete mix design C-5C was sufficient to allow NIR #5 to be closed.
t 2.
J. Fisher advisec that' grillage bea= installation procedure presentation was scheduled fer April 7.
e 3
There was a geh'eral discussion cf Assessment Team concerns with respect to backpacking.
(a) The method of placement of,the backpacking material
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and pcssibly the width ofith lagging spacing has' it times impeded cc ;1ete backpacking of void spates behind the lagging.
(b) The use of a fine grained sand as tackpac' King =aterial in wet areas is not the best practice. All concerned parties will meet at pier E11 ('11AMfte discuss and resc1ve t
concerns.
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4 G. Murray said the E/WE design package may gc tc NRC April 7.
5 G. Murray will advise en what the cc :ittents are to procuce underpinning as-built documents. The question is as to what extent the fcundatiens are included as opposed to the soil foundation =aterial.
e 6.
W. Kilker advised that the Assei'sment Team tils issued an KIR c:: the observed method cf assuring full lead, transfer when rejacking the piers. M? CAD will issue a-.QAR~to initiate FSO response.
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N DAILY INDEPENDENT ASSESSMENT TEAM MEETING l
Date: April 7, 1993 Attendees: Sechtel Stone / Webster M?OAD CPCo J. Fisher L. Rouen J. Shah G. Murray E. Cviki A. Scott J. McMaster P. Majeski Parsons
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1.
The Assessment Tea: indicated that Mergentime's presentation en April 7 regarding installation cf the grillage bea:s at pier E provided the information currently required.
2.
J. Ratner and A. Scott indicated that Team menbers =et with representative of Field Engineering, Resident Engineering, MPQAD, and Mergentice at pier
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E11 on April 6.
The concerns raised in the daily meeting of April 6 cver i
the backpacking material grain sice in wet areas and the louver spacing effect on the final backpacking productwere satisfactorily addressed.
3 G. Murray indicated that drawing "as-builts" of underpinning effort will be the same as those for talance.cf plant; that is, changes are required when there is a FON or FCP. written against a drawing.
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DAILY INDEPENDENT ASSESSMENT TEAM MEETING t
i Date: April 3. 1963
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Attendees:
Sechtel Stone / Webster M?OAL C?0c J. Fisher L. Rouen J. Shah G. Murray E. Cviki A. Scott J. Gaydos Parsons J. Ratner i
1.
J. Fisher stated that two shifts are scheduled to work Saturday on E/WS
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and E/W11. Also it is possible that the pier E11 tell will be poured Saturday.
i 2.
J. Ratner asked if the plate supporting the E11 bell excavatien would
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be greuted prior to placenent of concrete.
J. Fisher stated it would be either grouted or renoved prier to placenent.
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3 J. Gaydos said that cixes with plastici:er have been develcped and new await approval by Bechtel San Francisco office.
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m STONE & WEBSTER MICHIGAN, INC.
P.O. Box 2325. Boston. MASSACHUSETTS 02107 l
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I United States Nuclear Regulatory Commission April 7, 1983 Midland Site Resident Inspection Office Route 7 J.O. No.
14358 1
Midland, MI 48640 Ref. MPF 28 Attention Mr. R. Cook RE: DOCKET No. 50-329/330 MIDLAND PLANT - UNITS 1 and 2 INDEPENDENT ASSESSMENT OF AUXILIARY BUILDING UNDERPINNING REPORT NO. 28 A copy of the Independent Assessment of the Auxiliary Building Underpinning Weekly Report No. 28 for the period March 27, 1983 through April 2, 1983, i
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.
Very truly yours, k.
A. Stanley Lucks Project Manager Enclosures ASL/ka 3
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'J.O. NO.
14358 Mid1tnd Pitnt f-)
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Units 1 and 2 Independent Assessment Auxiliary Building Underpinning 1
Weekly Report No. 28 March 27, 1983 through April 2. 1983 Personnel en Site Stone & Webster Michigan, Inc.
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W. Kilker 3/27 - 4/1 P. Barry 3/28 - 3/30 B. Holsinger 3/28 - 3/29 R. Beaudet 3/28 t
Parsons, Brinckerhoff Michigan, Inc.
4 J. Ratner 3/30 - 4/2 M. Abrahams 3/30 - 3/31 l
Meetings Attended Date Represented Purpose 3/27 Stone & Webster rally Meetings through Bechtel 4/1 Consumers Power Parsons (3/30 4/1) 3/30 Stone & Webster Daily Field Meeting Bechtel (West Side)
Consumers Power Mergentime Activities Construction -
Pier W12: The Contractor continued to monitor the pier settlement and check the shims for tightness. Based on the minor additional settlement rejacking was not considered necessary.
Pier W9: Curing of the pier surface was maintained throughout the week. The upper and lower leveling plates and telltale plate were installed. Drypack grout was used for the upper plates and a flowable grout for the bottom plate, f
Pier W11: Excavation of the pier was advanced nearly 3r ft.'to El. 570 ft.
A mixture of granular and clay fill was encountered to Ell 585 underlain by the stiff natural clay. Minor perched groundwater entered the excavation through a granular zone at El. 586.
The lagging in the vicinity of the perched water level was backpacked with grout.
Below that level a reistively fine grained sand was used to backpack the lagging.
Minor seepage continued to infiltrate the excavation below the sealed zone.
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J.O. NO.
14358
,s Midland Plant Uni'ts 1 and 2 Independent Assessment Auxiliary Building Underpinning 2
Pier E12: The load transfer was monitored and a rejacking of the pier was performed. The specified load was re-introduced by the jacks and the shims were re-driven to a tight fit.
Pier E9: The upper concrete surface curing was maintained. All of the preparations.
were completed for load transfer including installation of the leveling plates, telltale box and dial gauges, bearing plates and jackstands.
9 I
Pier Ell: The excavation was completed to El. 580. Granular and clay fill were excavated to El. 586, the interface with the natural stiff gray clay. There was minor seepage into the excavation at a depth of 13 ft.
The lagging was backpacked with fine sand.
Quality Control, Documentation and Records:
1.
Witnessed QC inspection of Hilti bolt torquing.
2.
Assessed the sampling and making of drypack grout samples.
3 Assessed the welding program implementation.
Observations Construction - The preparatory activities for load transfer on piers E9 and W9 were adequate. The drypack grout was well-mixed and densely packed and curing conditions well maintained. Also, care was taken in properly aligning the leveling and bearing plates.
l On pier E12 the Contractor performed a rejacking to verify the tightness of the j
shims. - The procedure involved applying the specified load to the building through the jacks and then driving the wedges to a tight fit. The Assessment Team feels
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that in keeping with good underpinning practice the wedges should be driven until i
10 to 15 percent of the specified load has been removed from the jacks as indicated by the pressure gauge.
At pier W11 perched groundwater was encountered near the fill-clay interface.
Seepage of this water into the excavation was controlled by grouting the lagging spaces to divert the flow to a collection trough. However, as the excavated / lagging progressed a sufficient quantity of water continued to seep between the lagging to erode some of the fine grained sand backpacking material. The Assessment Team feels the use of fine grained sand for backpacking under these conditions is not 4
consistent with good underpinning practice.
Quality Control, Documentation and Records - With reference to the drypack grout samples, the Assessment Team feels that the Contractor and testing agency should verify that the energy input used for making samples is comparable to that used in packing the grout in-place. Comparable energies should be used in order to have test samples respresentative of the installation.
The Assessment of the welding program will appear in Weekly Report No. 29.
Design Work Packages The Assessment Team performed an overview of the design work package for the construction and feels the package for. piers E/W8 was complete. The Team feels 1
that the retrival of the bell foot size dimensions from the drawings is difficult
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and drawing cross-referencing could be improved. In addition, the Team recommended i
that the as-built pier E/W9 dimensions be checked for impact on the E/W8 pier foot dimensions.
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Units 1 and 2 Independent Assessment Auxiliary Building Underpinning 3
1 Non-Conformance Identification Reports l
Status of previous issues:
(NIR numbers on longer listed have been closed-out.)
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Description Date NIR NO.
(0pened)
(Closed) 5 Concrete Mix 2/10/83 Qualification 6
Lagging spacers 3/21/83 4
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Project Engineer Project Manager
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3 DAILY INDEPENDENT ASSESSMENT TEAM MEETING Date: March 28, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo J. Fisher W. Kilker R. Visser G. Murray l
l R. Weight B. Holsinger G. Cable P. Barry
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M. Blendy R. Beaudet E. Cvik1 i
1.
General discussion of concrete placement for pier shafts E/W9 on I
March 26, 1983 Placement went well. Concrete was kept near the low side of the slump limitations.
2.
J. Fisher said load transfer at piers E/W9 could be March 30-March 31 3
M. Blendy reported the work package for the drift and pier installation for E/W8 is nearly ready for submittal to SMO.
4.
B. Holsinger questioned why on the bell pour at W9, a slump test at the end of the pumpline was not taken after the previous load of concrete was rejected for too high a slump based on an end-of-the-line
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test. MPQAD will respond.
5.
B. Holsinger questioned the adequacy of the testing procedure on the preparation of dry pack grout samples for testing. Are the field conditions being adequately simulated? MPQAD will respond.
I'l 6.
W. Kilker requested the schedule for work on the SWPS.
J. Fisher will j
provide.
J. Fisher said there was a demonstration of the deep probe device today.
6.
R. Beaudet presented a brief synopsis of his assessment of the project welding procedure, the implementation and inspection.
W. Kilker stated the assessment summary will appear in Weekly Report No. 27.
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e DAILY INDEPENDENT ASSESSMENT TEAM MEETING Date: March 29, 1983 i
Attendees:
Bechtel Stone / Webster MPQAD CPCo l
l J. Fisher P. Barry R. Visser G. Murray E. Cviki B. Holsinger
,J. Gaydos W. Kilker 8
1.
P. Barry asked if thetwo NCR's on E/W9 bell concrete placement have been resolved.J. Gaydos said the slump-related NCR was conditionally dispositioned depending upon the cylinder strength test results. The NCR on the vibrator use interruption was dispositioned by FSO.
2.
W. K11ker requested to meet the Spencer, White, Prentis, Inc. site management personnel.
J. Fisher will arrange.
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3 P. Barry inquired if there is a minimum 7 day cure period for the piers or if strength considerations dictate the cure period. J. Fisher will resolve.
4.
J. Gaydos reported that only one sat of record concrete gylinders is required.cn a given day of concrete placement volumes of less than 100 cy.
5.
R. Visser stated that additional end-of-line concrete slump tests were not performed on pier W9 bell after an initial high slump test because the subsequent mix was kept in the mixer for 45 minutes before placement.
i 6.
With respect to the dry-pack grout sampling and testing procedure, R. Visser said that MPQAD is satisfied with the procedure.
B. Holsinger stated it is important to match the ramming energy inputs for the field installation and the laboratory test samples. The field strength should then be better represented by the lab test results.
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I DAILY INDEPENDENT ASSESSMENT TEAM MEETING Date: March 30, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo j
J. Fisher P. Barry R. Sevo G. Murray E. Cviki W. Kilker D. Puhalla i
J. Gaydos K. Pearson Spencer / White /Prentis H. Armstrong D. Canale J. Cataldo 1.
J. Fisher reported that a review session with Mergentime on grillage beam installation would be next week.
2.
J. Fisher inquired if MPQAD felt the 2 NCR's on pier W9 bell concrete
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placement contained enough information in the description.
R. Sevo replied j
that the NCR description is meant to contain only the cause of the non con-formance not additional information.
3 Three principals from Spencer, White & Prentis were introduced to Assessment Team members present.
4.
J. Fisher stated load transfer on piers E/W9 is still planned for April 1, 1983 5.
Discussion of discrepancies noted in quality of dry-pack grout test samples j
vs. actual field installed dry-pack grout.
R. Sevo suggested FSO resolution by tracking through the handling and making of the cubes and compare to field j-grout placing techniques.
6.
P. Barry stated he reviewed the E/W8 drift and pier excavation / installation work package. Suggested: (1) An improvement in the dimensioning designation of the bell foot. Retrival of this size is difficult and cross-referercins is poor. (2) That piers E/W9 as-built dimensions be evaluted in piers E/WB review since'E/W9 are installed and actual locations are known. J. Fisher will i
resolve.
7.
R. Sevo inquired if two adjacent piers are allowed to bond at the bell bottom or if there is a " separation" requirement.
E. Cviki will advise.
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DAILY INDEPENDENT ASSESSMENT TEAM MEETING Date: March 31, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo J. Fisher W. Kilker R. Sevo G. Murray E. Cvikl J. Gaydos K. Hevner G. Cable J. Northrup Parsons J. Ratner i
M. Abrahams 1.
J. Ratner introduced M. Abrahams, welding engineer from Parsons, on-site for the day to evaluate welding quality.
2.
NIR #5 cannot be closed until Project Enginnering responds to MPQAD open issues.
E. Cviki is resolving.
W. Kilker said the Team would then review the responses and if satisfactory close-out the NIR.
3 J. Fisher said the April 1 E/W9 load transfer date is tentative. No 1
additional underpinning work will be performed this week-end.
4 K. Hevner reported on the 2 team observations raised during the over-view of the work package for piers E/W8 (see Daily Meeting Notes of March 30).
4 l
(1) The concern was well-taken but the drawing complied with Project Engineering standards.
W. Kilker responded that the Team felt the initial observation raised was nevertheless valid and would be reported as such. (2) J. Darby of Resident Engineering has taken action on 1
pier E8 since pier E9 bell bottom as built extends approximately 2 inches into the pier EB " foot-print". Pier W9 bottom as built is within a fraction of an inch plan location and is therefore of no concern.
' 5.
J. Ratner raise a concern over the use of the fine sand to backpack in the wet area of pier W11.
J. Fisher said coarser backpack material could be employed if the running sand is a problem.
6.
J. Ratner questioned if the excavation from piers.8 toward the containment will proceed before 'the schedule for grillage beam delivery is finalized.
J. Fisher replied that the opening of those areas will be tied into i
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the grillage delivery dates.
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DAILY INDEPENDENT ASSESSMENT TEAM MEETING Date: April 1, 1983 5
l Attendees:
Bechtel Stene/ Webster MPOAD CPCo I
J. Fisher W. Kilker R. Sevo G. Murray E. Cviki t
J. Gaydos Parsons J. Ratner i
1.
G. Murray advised that the guideline on the definition of construction aids is under discussion between MPQAD and SMO. Resolution will depend 1
on the outcome of this discussion.
2.
E. Cviki reported that Project Engineering has responed to the NCR on concrete six design.
R. Sevo and W. Kilker said their observations will be made on April 4.
3 J. Gaydes said the 10-day strength on the cylinder made from the "high slump" concrete in pier W9 bell was 5000 pai.
a 4.
R. Sevo and G. Murray stated that with regard to Assessment Team NIRs, the response will be generated dirvetly by Consumers or through a Quality Action Request or by an NCR which require disposition.
S.
J. Fisher advised load transfer to piers E/W9 is scheduled for Apail 4 I
6.
J. Gaydos said the field had prepared some dry-pack grout samples to j
compare to record samples prepared by the testing agency. Concern is that test samples have nat been as well compacted or cured as the in-place grout.
7.
J. Fisher concurred with J. Ratner's concern over the use of a fine-medium grained sand as backpacking material in locations where seepage may wash-out the material.
J. Fisher will resolve.
8.
W. Kilker inquired of CPCo if _ the work package for E/WB has been finalized.
G. Murray stated that SMO is waiting until Hergentime issues a schedule on the shop drawing completion.
9.
J. Ratner asked if there is a commitment to produce as-built drawings of-the underpinning installation and when the effort will commence.
J. Fisher will respond.
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STONE & WEBSTER MICHIGAN, INC.
j P.O. Box 2325 Boston. M AsSACHUsETTs O2107 United States Nuclear Regulatory Commission April 1, 1983 Midland Site Resident Inspection Office Route 7 J.O. No.
14358 Midland, MI 48640 Ref. MPF 27 Attention Mr. R. Co,ok RE: DOCKET NO.
50-329/330 MIDLAND PLANT - UNITS 1 and 2 INDEPENDENT ASSESSMENT OF AUXILIARY BUILDING UNDERPINNING REPORT NO.
27 l
A copy of the Independent Assessment of the Auxiliary Building Underpinning
)
Weekly Report No. 27 for the period March 20, 1983 through March 26, 1983, i
is enclosed with this letter. Included as attachments, are the minutes of j
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.
Very truly yours, k..
$4 J
A. Stanley Lucks,u k 4
i Project Manager Enclosures ASL/ka li i
APR 41983 i
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No. 14358 j
Mid1:nd Plcnt Units'I and 2
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Independent Assessment Auxiliary Building Underpinning i
Weekly Report No. 27 March 20, 1963 through March 26, 1983 i.
i Personnel on Site Stone & Webster Michigan, Inc.
l W. Kilker 3/25 - 3/26 i
P. Barry 3/21 - 3/26 B. Helsinger 3/21 - 3/26 S. Lucks 3/21 - 3/23 l
R. Beaudet 3/22 - 3/26 i
Parsons, Brinckerhoff Michigan, Inc.
P. Parish 3/22 - 3/25 l
2 Meetings Attended Date Represented Purpose i
1 3/21 Stone & Webster Daily Meetings through Bechtel 3/25 Consumers Power j
Parsons 3/25 Stone & Webster weekly soils Review Bechtel Consumers Power 3/22 Stone & Webster Pier W11 Load Test I
Bechtel
.,I Activities Construction - Pier W12: The pier settlement was monitored and shims checked for tightness.
Pier W9: As stated in Weekly Report No. 26, there waa minor unravelling of the soil so the Contractor elected to install the reinforing steel and instrumentation 4
within the bell portion only of the pier. The concrete was placed on March 22, 1983 During the placement a concrete slump test on material taken from the end of the pumpline ~ indicated excessive slump which required making additional test cylinders to verify the strength. A compresssor powering the concrete vibrators failed forcing a delay of nearly one hour during the placement. However, once repaired the vibrator was able to penetrate the in-place concrete under it's own weight. Subsequently, the shaft reinforcing steel, te11 tales, embeds and forming were completed and the shaft concrete was placed on March 26, 1983 The concrete slump was relatively low (between 2 and 3 inches)saking discharge from the mixer slightly difficult.
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J.O. NO.
14358 Mditnd Plcnt m
- Units.1 and 2
'}
Independent Assessment Auxiliary Building Underpinning 2
Pier W11: ThJ advancement of the drift was slow due to the cure time required on i
the dry-pack grout used to fill partially drilled drift set anchor bolt holes.
Excavation of the pier advanced to a depth of 2 ft.
Pier E12: The load transfer was completed on March 22, 1983 when the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> deflection criteria was satisfied. Routine rejacking of the pier continued j
for the remainder of the week.
i j
Pier E9: As in the case of pier W9 the Contractor elected to install the concrete j
in the bell portion to prevent excessive urravelling of the soil. The reinforcing steel and telltale were installed to above bell elevation and the concrete was i
l placed on March 22, 1983 After installation of the remaining reinforcing steel, embeds and telltales, the concrete placement in the shaft was completed on i
March 26, 1983 Pier E11: The progress on the drift to the pier was slow due to the drift set anchor bolt hele grout cure time as described above for the pier W11 drift. The excavation was complete but the drift sets and re-shore channels have not been i
j completely secured.
j Cuality Control, Documentation and Records:
1.
Verified the rejacking of pier E12 was being performed in accordance with the project procedure.
2.
Performed a pre-placement evaluation of E9 and W9 shafts prior to concrete placement.
j 3
Witnessed the inspection and testing of concrete during placement of pier shaft concrete on piers W9 & E9.
3 4
Verified issue of 2 NCRs on pier W9 bell concrete pour.
I l
5 Performed an assessment of the welding activites associated with the fabrication of materials for the underpinning work. The assessment included discussions with craftsmen, welding engineers, and MPQAD engineers and inspectors. Specifications, procedures, and inspection reports were reviewed. Welds were inspected prior to and after release from QC inspection. The training certification and experience of the QA/QC personnel were evaluated and in-process inspections were witnessed.
i Observations Construction: The Team feels the Contractor showed good engineering judgment in electing to concrete the bell portion of piers E9 and W9 thereby preventing additional unravelling of the soil. The reinforcing steel placement and pre-placement clean-ups in both piers was satisfactory. The concrete placement in pier bell E9 and shafts E9 and W9 was accomplished without incident. The high slump and loss of vibrator problems associated with the pier W9 bell pour were adequately addressed, l
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14358 Units '1 and 2
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Midir.nd Pitnt
~
Independent Assessment Auxiliary Building Underpinning 3
1 Quality Control, Documentation and Records-The completion of the load transfer to pier E12 was in accordance with the project documents. Total pier deflection to date is on the order of i inch.
The QC personnel on the pier bell W9 pour reacted correctly to the high slump concrete in rejecting the load, taking additional record cylinders and writing a non-conformance for engineering disposition. The issuance of a non-conformance on the vibrator down-time was correct. However, the NCR failed to cention the condition of the concrete upon resumption of the vibration. In this case adding the QC evaluation of the concrete condition to the NCR would have aided in the l
engineering disposition.
I The overall assessment of the welding program was positive. The weld quality
.l appreared good snd the rejection rate was quite low during the time period of this assessment. The inspection personnel were well-trained and knowlegable. Project Engineering and the construction groups have both committed qualified engineers to assist in the resolution of welding problems. Until recently the overall progress of the underpinning has been impacted by welding-related delays. The Assessment Team feels it is the responsibility of all the organizations involved - construction, j
engineering and quality Assurance - to improve the process, whether by actual I
improvements in the weld quality, by clarification to the specifications and pro-cedures, or by improved communication. A common understanding of the level of
~'
The Assessment l
quality of the welding required for this work must be attained.
Team is of the opinion that the engineering group must be instrumental in fostering this understanding.
Pier W11 Load Test The Assessment Team raised a concern expressed by the NRC over the construction activities planned in the vicinity of pier W11 during the proposed load test.
Project Engineering stated that no new construction would be initiated within 20 ft. of pier W11 until completion of the test. The Team concurs that this
.l commitment is sufficient to avoid effects of construction on the test or test i
results.
Non-Conformance Identification Reports Status of previous issues:
(NIR numbers on longer listed have been closed-out.)
NIR NO.
Description Date (Opened)
(Closed) 5 Concrete Mix 2/10/83 i
Qualification
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6 Lagging Spacers 3/21/83 0
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' Project Manager 4
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l INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: March 21, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo J. Fisher P. Barry R. Visser D. Puhalla J. Darby S. Lucks J. G.aydos l
1.
J. Fisher stated that work on the third drift set for pier W11 was delayed i
until the expansion bolt location and the drift set top plate details are i
finalized.
J. Darby stated that the hold on torquing the expansion bolts would not restain excavation of pier W11 because the diagonal braces that require the expansion bolts are not required until the mass ercavation.
2.
J. Fisher stated that the channel embedded in the lean mix concrete will l
no longer be used to support the plywood used to keep load off freshly I
placed concrete or grout. In the future if this platform is required it will be supported from the temporary wood lagging in the bell.
3 J. Fisher stated that the plan is to place concrete in the bell of both piers E/W9
[
4 R. Visser stated that QA had not approved the disposition of the NCR or the i
concrete mix approval because of insufficient information on the training i
of personnel to the ACI requirements.
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.m INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL 1
Date: March 22, 1983 1,
Attendees:
Becthel Stone / Webster MPOAD CPCo j
J. Fisher P. Barry R. Visser D. Puhalla I
.J. Kelleher l
E. Cviki M. Lewis Parsons P. Parish 1.
J. Fisher stated that load transfer on E12 was continuing.
I J. Fisher stated that excavation in E/Wil drifts was delayed pending issue j
2.
of an FCR on expansion bolt and drift set details, 3
P. Barry questioned why two complete sets of concrete test were required when t
both bells were placed on the same day. Bechtel will advise.
4.
P. Barry asked about the method of installing the E/WB grillage beams.
Bechtel will arrange a meeting to present the installation method. The cor.struction procedure for the activity is being revised.
J. Fisher requested E. Cviki to confer with project engineering in Ann Arbor 5.
concerning NIR #6.
M. Lewis stated that back packing and inspection could be done with the 1-1/8 inch spacers.
A. Lucks stated that the backpacking j
installed is acceptable but that the procedure should be revised to use the li inch spacers. Bechtel previously agreed to use the spacers.
J. Fisher l
stated that it would be difficult to use 1)" minimum near the ring beam since j
the spaces at the ring beam are adjusted so that the ring beam can be installed i
at the proper elevation.
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INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: March 23, 1983 l
Attendees:
Bechtel Stone / Webster MPQAD CPCo
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J. Fisher P. Barry R. Visser R. Wieland J. Gaydos A. Lucks M. Lewis R. Beaudet B. Holsinger f
Parsons P. Parish 1
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l 1.
M. Lewis stated that the load transfer for pier E12 was completed on the l
afternoon of March 22, 1983 Routine jacking will begin this morning March 23, 1983 I
2.
M. Lewis stated that the RSE requested rejacking of pier W12 because the i
pier had settled 5 mils since the end of routine jacking to ensure that 110% of specified load is in the pier.
3 J. Fisher stated that the FCR on testing dry. pack grout has been written.
4 J. Fisher stated that the compressor for the-concrete vibration broke down at 5:30 PM during the placement of concrete in the E9 bell. Another com-s
)
pressor was used to power the vibrater. Vibration of concrete was resumed at 5:55 PM and the vibrator penetrated the existing concrete by it's own 4
weight. The vibration was witnessed by the MFE, Bechtel FE and QC.
J. Fisher stated that this was in conformance with the specification and that a NCR was not necessary.
5 J. Fisher stated that during the placement of the E9 bell a slump was taken at the end of the pumpline at the request of B. Holsinger. This slump was 4
'61 inch. Two additional slumps, each 51 inch, and a set of concrete cylinders were taken at the end of the pumpline. A slump test was also taken at the end of the truck. This slump was 417 Bechtel feels that since this was the first truck that the slump change can be attributed to the 1 cubic yard of grout used to lubricate the pipeline.
A. Lucks and B. Helsinger stated that enough concrete had gone through the line to preclude the grout affecting concrete slump.
'J. Fisher stated that the second test for the placement was taken on the first truck load in pier E9.
6.
P. Barry requested a copy of all FSO and QA/QC records concerning the concrete placement.
Subsequent check of QC records show that 6 cubic yard out of 8 cubic yard total had been discharged from the truck.
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INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: March 24, 1983 i
Attendees:
Bechtel Stone / Webster MPQAD CPCo J. Fisher P. Barry R. Visser R. Wieland J. Gaydos R. Weight
,E.
Cviki Parsons P. Parish 1.
J. Fisher advised that the rejacking of W12 would be done tommorrow
. morning, March 25, 1983 2.
J. Fisher stated that the NCR on dry pack grout has been given interim approval and that work or grouting can proceed.
3 P. Barry stated that the question concerning holding the proof load on the pier longer than required was still open.
E. Cviki stated that this is contrary to the procedure and cannot be done without a procedure change.
4.
P. Barry stated that the vibrator down-time mentioned in yesterday's meeting was incorrect. The placement according to the Bechtel field engineer daily reports show the placement delayed from 5: 12 to 5:55 PM.
The opinion of the Assessment Team members present during placement was I
that the delay was slightly longer than recorded.
J. Fisher stated that since the additional slump testing and the loss of power occurred essentially at the same time and the extent of the loss of power was not known immediately the determination of the time of loss of power may have been approximate.
5.
J. Gaydos stated that two NCR's were written by QC on the loss of power and the excessive concrete slump. Disposition for these NCR's one being postponed. One of the cylinders cast to verify concrete strength for the out of spec concrete was damaged but 5 cylinders remain intact.
6.
P. Barry stated that the NCR's should note that when power was restored the vibrator penetrated the concrete under its own weight and that cylinders were cast from the out of spec concrete.
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INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL
' I Date: March 25, 1983 8
Attendees:
Bechtel Stone / Webster MPQAD CPCo J. Fisher P. Barry R. Visser P. Puhalla J. Gaydos R. Beaudet E. Cviki 4
Parsons P. Parish a
P. Barry requested any data available on concrete slump correlation 1.
between slump at the tailgate and slump at the end of the pumpline.
P. Barry also requested that tailgate slump be taken on the placements for E/W9 to correlated with the record tests.
J. Gaydos stated that this is normal procedure.
J. Gaydos also stated that concrete placement 4
for E9 is scheduled for tommorrow March 26, 1983 Placement for W9 maybe done tommorrow if the two NCR's on the bell concrete placement have been J
dispositioned.
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O STONE & WEBSTER MICHIGAN. INC.
P.O. Box 2325. Boston. M AssAcHusETTs 02107 United States Nuclear Regulatory Commission March 23, 1983 Midland Site Resident Inspection Office Route 7 J.C. No.
14358 Midland, MI 48640 Ref. MPF 26 Attention Mr. R. Cook RE: DOCKET NO.
50-329/330 MIDLAND PLANT - UNITS 1 and 2 INDEFENDENT ASSESSMENT OF AUXILIARY BUILDING UNDERPINN1hG REPORT NO. 26 A copy of the Independent Assessment of the Auxiliary Building Underpinning Weekly Reprrt No. 26 for the period March 13, 1983 through Maren 19, 1983, is enclosed with this letter. Included as attachments, are the %rnite.; ;?
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.
Very truly yours, 4wUg L 4 A. Stanley Lucxs i
Project Manager Enclosures ASL/ka i
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NO.
10358
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Midland Plant Units 1 and 2 Independent Assessment Auxiliary Building Underpinning Weekly Report No. 26 j
March 13,1983 through March 19, 1983 i
Personnel on Site Stone & Webster Michigan, Inc.
W. Kilker 3/13 - 3/14 P. Barry 3/15 - 3/19 Parsons, Brinckerhoff Michigan, Inc.
I j
V. Madill 3/14 - 3/18
[
Meetings Attended Date Represented Purpose 3/14 Stone & Webster Daily Meetings through Bechtel 3/18 Consumers Power Parsons 3/14,16,18 Stone & Webster Bechtel Meetings Bechtel on Welding Issues 3/18 Stone & Webster Weekly Scils Review Bechtel Consumers Power i
l Activities Construction - Pier W12: On the morning of March 14, 1983 the acceptance criteria of.01 inch deflection maximum in 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> was attained, the shims were tightened, and the pressure in the jacks released. For the next 3 days 110'4 of the specified load was rejacked into the pier, the shims tightened, and the jacks depressurized.
After this rejacking effort, shims were checked for tightness each shift.
Pier W9: Pier excavation including belling was completed from El. 582 to the subgrade. All lagging and bell supports were installed. The mud-mat was placed after approval of the subgrade by the RGE. The material excavated was natural gray clay. No significant groundwater seepage entered the excavation. The natural gray clay in the bell experienced some unravelling. ' Additional steel plates were installed to support the areas subject to unravelling.
Pier W11: The excavation for the drift to W11 was completed. The second drift set was installed but an NCR on the testing of dry pack grout for the abandoned expansion anchors holes has prevent torquing of the expansion schors. The third
' drift set and associated lagginghas not been installed. Temporary breast boards have been installed in place of the lagging.
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Independent Assessment Auxiliary Building Underpinning 2
i Pier E12: The jackstand and te11 tales were completed and installed. The lead transfer was initiated on the morning of March 18, 1983 Within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> the 4
4 proof test load of 1250 kips (125% of the specified load) was applied through two 565 ton jacks and accepted with pier deflection less that.01 inch for a
' continuous 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> period. Then the load was reduced tc 110% of specified lead.
t The pier had moved downward approximately 0.19 inches with respect to the turbine l
mat while the bottom of the pier had moved 0.03 inches with respect the top of the pier. As of March 19,1983 the 110% load had been maintained for approximately 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. The pier deflection criteria of less than.01 inches for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> had not yet been satisfied.
Total pier settlement, after 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />, was apprcximately 0.23 inches. The actual movement of the building as measured by a benchmark app-roximately 55 ft. away was less than 0.003 inches.
Pier Ell: Once the proof loading for pier E12 was acc1pted, excavation and support of the N-S access drift to pier E11 was initiated and completed to a distance of
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approximately 3 ft. under the turbine building. The excavated material consists of approximately 1 ft. of unreinforced concrete, a thin layer of sand, and 7 ft.
of clay fill. One steel set was installed in the drift.
Pier E9: The
..istruction activities and progress on this pier are similiar to 4
those at pier 49.
The material excavated from the pier was natural gray clay.
l The remaining lagging and bell supports were installed. The lean mix concrete mud-mat was placed after approval of the subgrade by the RGE. More unravelling occurred in this bell than in pier W9 The unravelled areas were covered with 4-additional steel plates and the voids behind the plates were backpacked with grout.
Ouslity Control. Documentation and Records:
f (1).
Verified the completion of the combines calibration record for pier E12.
(2). Verified that the jack system record, pressure schedule, and combined calibration record were available at pier E12 during the jacking operation.
(3). Reviewed the preliminary concrete trial mix data for_the new concrete i
mix for underpinning piers.
Observations i
i
. Construction: The load transfer to pier W12, which is complete, and to E12, which l
1s on-going, has been accomplished according to project documents. Pier performance i.
during proof jacking and load transfer has been satisfactory.
The excavation of. pier.E/W9 was done essentially in parallel with E9 remaining slightly ahead of W9. Material fabrication kept pace with the excavation with 1.
only a slight delay occurring as a result of fabrication problems. This is an i:
improvement in comparison with pier E/W12.. Soil conditions in the bells were similiar. The unravelling in E9 was greater than W9 and'both bells were provided.
with additional support. Although the unravelling was not considered major, it appears to be a _ continuing process and the contractor decided to place concrete -
in the bell section las early as possible.
The drift excavation for pier E/W11 made little~ progress this week. Difficulties locating ' expansion anchors because.of rebar interferences requires an FCR. Torquing
'of the expansion anchors is delayed'pending resolution of an NCR on dry pack grout j
testing.
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i Independent Assessment Auxiliary Building Underpinning 3
Quality Control. Documentation and Records - The quality related procedures ver-ified for the load transfer were properly implemented. The 3 day and 7 day strength breaks and the corresponding concrete tests were reviewed. The data will not be complete until the 14 day and 28 day strength are available. However, the 7 day l
strength are almost high enough to approve the entire range of water cement ratios tested for the mixes. The 14 day strength should be sufficient to approve the new l
concrete mixes. Future assessment will be needed when the mixes are approved.
Overview of Design Work Packages We have reviewed a schedule for the preparation of the design work packages for the Auxiliary Building and the Service Water Pump Structure. This schedule will j
be used to coordinate our overview with Consumers Power Company submittals of i.
design work packages.
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Non-Conformance Identification Reports Status of. previous issues:
(NIR numbers on longer listed have been closed-out.)
NIR NO.
Description (Opened)
(Closed)
S Concrete Mix 2/10/83 Qualification I-i 1
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INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL
'Date: March 14, 1983 Attendees:
Bechtel Stone / Webster MPCAD CPCo i
1 J. Fisher W. Kilker R. Visser G. Murray J. Gaydos
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E. Cviki R. Weight J. Kelleher 1.
J. Fisher introduced R. Weight and J. Kelleher representing the Direct Hire and Constructability groups.
i 2.
J. Fisher reported W12 pier settlement criteria will likely be satisfied today so shims can be tightened.
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3 J. Fisher reported week-end fab. shop work went well and that all lagging for E/W9 is complete and E/W11 lagging is started. Ring set for E/W9 r
is also nearly ready.
i 4
J. Fisher said the welding NCR on the E12 jackstand had not been resolved.
4 Once resolved 2 shifts will be needed to finish the fabrication. Earliest l
load transfer is now March 17, 1983 5
W. Kilker advised the group that the NRC had requested the Team assessment l
expand to include all underpinning of safety related structures.
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6.
W. Kilker asked if any underpinning work on safety related structures other than the Auxiliary Building or SWPS is planned for the near future.
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G. Murray said he did not envision any real soon.
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J. Fisher advised that today there is a " kick-off"~ meeting on the re-
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solution of welding non-conforLance.
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INDEPENDENT' ASSESSMENT TEAM MEETING WITH BECHTEL j
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Date: March 15, 1983
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_ Attendees:
Bechtel Stene/ Webster MPOAD CPCo J. Fisher R. Visser C. Murray "J. Gaydos E. Cviki J. Kelleher Parsons V. Madill 1
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1.
J. Fisher stated that the.01 inch settlement criteria for a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> i
period was met at 9:30 AM March 14, 1983 (Total settlement was i" I
in 72 hrs.).for pier W12. It is anticipated that the load test at pier E12 maybe started Thursday March 17, 1983 The welding for the jacking stand is being completed.
l 2.
The review of the draft copy of the administrative guideline FIU-1.100 l
is still being reviewed. The issue is still open with a meeting on i
same being pursued by F50.
t 3
A meeting on welding codes and procedures is to be hold at 3:30 PM today. A meeting is also being held at 10:00 AM at Mergentime's to review shop layout requirements.
4 This writer requested the name of the Subcontracter who will do the well installation for S;,encer, White & Prentis, Inc. and the approxinate i
start up time.
J. Fisher stated that Loughney Dewaterir.g Company will be the well Subcontractor and that they have been given OK to motilize i
i Monday March 21. 1983 They will work 6 day-10 hour shifts.
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INDEPENDENT ASSESSMENT TEAM MEETING WITH EECHTEL Date: March 16, 1983 L
Attendees Bechtel Stone & Webster MPCAD CPCo J. Fisher P. Barry R. Visser G. Murray J. Gaydos E. Cviki l
J, Kelleher 1
L. Weight L
l Parsons Y. Madill l
1 i
I 1.
The load transfer for pier E12 is scheduled for tommorrow morning i
March 17, 1983 l
1 2.
Spencer, White & Prentis Subcontractor, Loughney Dewatering should be l
ready to start work at the SWPS on March 23, 1983 However, the availability of certified QC inspection may require starting later.
3 Work on the drift to pier W11 is delayed pending closing an NCR on l
dry pack grout satorial.
i 4
4 In order to close out NIR #5, the C-5e concrete mix in question has to l
be deleted from the job and the NCR written by QA on the same subject has to be closed out. Approval of the new concrete six will not be sufficient j
i to close out this NIR.
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'N INDEPCNDENT ASSESSMENT TEAM MEETING WITH BECHTEL i
Date: March 17, 1983 Attendees:
Bechtel stone / Webster MPOAD CPCo G. Murray J. Fisher P. Barry E. Cviki J. Kelleher
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Loadttransfer on pier El is scheduled today. A copy of the combine calioration record for pier E12 was provided.
2.
J. Fisher provided a copy of the daily construction schedule for the i
probing, core drilling i.nd. test holes for the SWPS.
3 A copy of the engineering respon Y to NCR No. M0143043 concerning the appiaoval of mix C-5c was provided. The t:ix approval has been withdrawn.
When the NCR is, closed by QA.
NIR #5 will'be closed.
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4.
P. Barry q'uestiened that since the new mix with the 5 inch slump appears to give 4000 psi in.3 days, is it,necessary to use the mix with the high i
range water reduceb 'HRWRT.
Bachtel wishes:to use the HRWR since this mix improves constructability.
5.
v.16 dill questioned if it' was intended for the laybacks on the drifts for.W9, W11, and W12 to intersect. This intersection reco.cs soil from
~
beneath the turbine building mat fora long distance and reduces the load on drift set to app'roximately 5 ft.- of soil only. Bechtel' responded t%t many discussions concerning the laybacks have been held and no change is anticipated, and that the turbine buildling has been checked fer this condition.
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6.
The drift sets for pier W11 aceeis drift are differei.t frcA W12 and W9 drifts because they will be ine.orporated;into e 6illk head later.
7.
Pier E9 has progressed to the botti$i of.the pier and the mad-mat with 1
'embedment has been placed. Pier'W9 has progressed to the bottom of pier.
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E; Cviiil scatEd that in ths' daily report noEes for Nevermber 22, 1982 in Weekly Report No. 10 by the Assessment; Team itswas noted that J. Fisher dir-ected E.Cviki to arrange heet'..; with QA.
E. Cviki wishes to make it clear that J. Fisher from'FS0'cannot direct E. Cviki from Resident Engineering.
No sudh line of command exist. ThisJwas"a request not a direction.
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3 INDEPENDENT ASSESSMENT TEAM MEETING WITH BEHCTEL Date: March 18, 1983 i
Attendees:
Bechtel Stone / Webster MPOAD CPCo J. Fisher P. Barry R. Visser E. Cviki J. Gaydos 1.
During lead transfer of pier E12, Mergentime intends to hold the proof lead (125% of specified lead) approximately 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> after the acceptance criteria of.01 inch deflection in one hour. The reason for this is to attempt to reduce the time required for main-taining active jacking on the pier. Bechtel will investigate if this is contrary to their procedures.
i 2.
The dry pack grout for the unused holes for expansion bolts in drift W11 was released. The NCR only applied to U.S. Testing Lab's testing of grout. The dry pack is placed and cured but the bolts cannot be torqued until the grout cubes have been tested.
3 The working mat for the subgrade of pier W9 was placed with grout rather than lean mix concrete. Plywood was placed over the grout supported by angl.es that are part of the embedment to support the bell.
P. Barry questioned whether this satisfys the criteria to stay off the concrete until the strength reach 300 psi. Bechtel will investigate.
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&$iqF I, E$-f-M$C2iy3 STONE & WEBSTER MICHIGAN, INC.
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United States Nuclear Regulatory Commission March 16, 1983 Midland Site Resident Inspection Office Route 7 J.O. No.
14358 Midland, MI 48640 Ref. MPF 25 Attention Mr. R. Coo'k
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i RE: DOCKEf NO.
50-329/330
[
M7.DLAND PLANT - UNITS 1 and 2 INDEPENDENT ASSF.SSMENT OF AUXILIARY BUILDING UNDERPINNING j
.* REPORT NO.
25 A copy of the Inde' pendent Assessment of the Auxiliary Building Under-pinning Weekly Report No. 25 for the period March 6, 1983 through March 12, 1983, is enclosed with this letter. Included as attachments, are the minutes 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.
Very truly yours, i
SC.
GIb A. Stanley ucks Project Manager j
Enclosures l
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NO.
14358
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Midland Plant Units 1 and 2 Independent Assessment Auxiliary Building Underpinning Weekly Report No. 25 March 6, 1983 through March 12, 1983 Personnel on Site Stone & Webster Michigan Inc.
W. Kilker.
3/6 - 3/12 P. Barry 3/6 - 3/9 A. Scott 3/6 - 3/9 L. Rouen 3/6 - 3/8 i
Parsons, Brinckerhoff Michigan, Inc.
I J. Ratner-3/6 - 3/11 Meetings Attended Date Represented Purpose I
3/7 Stone & Webster Daily Meetings
{
through Bechtel 3/11 Consumers Power Parsons 3/10 Stone & Webster Discussion of Work Censumers Power Package Submitals i
3/11 Stone & Webster
-Weekly Soils Review Bechtel Consumers Power I
Activities Construction - Pier W12: The jackstands were completed and installed. The load transfer was initiated around noon on March 11.
Within 2) hours-the proof test load of 1375 kips (125 percent of specified Ioad) had been applied through two 565 ton jacks. Some 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> later the proof test load settlement criteria was satisfied, less that.01 inch for a continuous 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> period, and the load was reduced to 110% of specified load. This time the pier had moved downward approximately 0.19 inches with respect to the turbine mat while the bottom of the pier had moved 0.03 inches with respect to the tog,
of the' pier. As of March 13, the 110% load had been maintained for 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.
The pier deflection criteria of less than 0.01 inches for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> had not
_yet been satisfied. Total pier settlement was approximately 0.23 inches.
The actual movement of the building, as measured by a benchmark approximately i
55 ft. away, was less than.005 inches.
Pier W9: The 9 ft. long N-S drift at right angles to the previously com-l' pleted 20 ft. long E-W drift was excavated and supported. The excavated caterial was similar to that~in the E-W drift - unreinforced concrete under-lain by a thin layer of sand and 6 ft. to 7 ft. of clay. The unreinforced concrete was located both above and below the turbine mat membrane. No groundwater seepage entered the-excavation.. Three steel drift sets were' l
'i installed and wood lagging was pinced between the sets along the sides of.
the drift and at the end of the drift.
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14358
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,s Midland Plant Units 1 and 2 Independent Assessment Auxiliary Brilding Underpinning 2
i The pier excavation was completed fromEl 600 to El. 582. The excavated material consisted of approximately 15 ft. of a mixture of clay, sand and gravel fill underlain by 3 ft. of natural gray clay. No groundwater seepage entered the excavation. Sixteen levels of steel lagging were installed and backpacked.
f Pier W11: Once the load transfer to pier W12 was complete, excavation and support of the N-S 8 ft. x 8 ft. access drift to pier W11 was initiated and completed to a distance of 4 ft, under the turbine buil' ling. The excavated material consisted of approximately 2 ft. of unreinforced concrete and 6 ft.
of clay fill. One steel set was installed in the drift.
Pier E12: Installation of the upper and lower bearing plates and the tell-tale bearing plate was completed.
4 Pier E9: The construction activities and progress on this drift and pier were similar to those at pier W9.
The excavated materials in the drift were j
unreinforced concrete (above and below the turbine building mat), thin layers l
of sand fill and about 7 ft. of clay fill. The soil excavated from the pier to El. 581 consisted of 13 ft. of clay fill underlain' by natural gray clay.
No groundwater seepage entered the excavation. Seventeen levels of steel lagging were installed and backpacked.
i Quality Control, Documentation and Records 1.
Verified the completion of the jack record, loading. schedule and I
calibration forms prior to initiating load transfer to pier W12.
2.
Verified that the procedural criteria was met for load reduction during load transfer at pier W12.
l 3
Witnessed the implementation of the QC hold-point on the.RGE de-termination of the natural clay-fill interface at pier W9.
4.
Witnessed the probe-for groundwater near El.589 in a zone of granular fill at pier W9.
5.
Verified the completion of the QC welding inspection report for pier W12 Jackstands.
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Observations b
.The' load transfer to pier W12 was being accomplished according Construction' to the project documents. Downward movement of the pier has been small - less than one-quarter inch over a period of 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. Deflection of the turbine
. building as measured by nearby benchmarks has been'less than. 005 inch.
- The construction'of the N-S drifts to piers E/W9'and W11'was in accordance with the project documents and good underpinning practice. The lagging was securely installed behind the-drift. sets and backpacking was; generally J.
. adequate.
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.J.O.
NO.
14358
S Midland Plant Independent Assessment
+
Auxiliary Building Underpinning 3
A few spacer blocks were located so close to the set supports that good back-packing was difficult to achieve in these areas. Future lagging work should
- avoid this condition. The use of excelsior was avoided since no groundwater j
seepage was present. Previously installed excelsior in the N-S drift to pier 9E was removed.
j l
Pier excavation and support at piers E/W9 was for the most part well done.
J However, narrow lagging set spacers of 1 inch or slightly less in the upper l
8-10 ft. of the pier excavations makes proper backpacking and inspection extremely difficult. The Team does not agree with the use of the nominal 1 inch spacers to separate lagging sets. This separation does not provide i
sufficient space to adequately backpack or inspect behind the lagging. A i
li inch minimum spacing should be maintained (unless ground conditions require
~h closing the gap) to allow proper backpacking and inspection.
Quality Control, Documentation and Records - The quality-related procedures
}
observed or verified by the Team were properly implemented.
l l
Quality Assurance Overview of MPQAD-Soils Requalification and Certification Program l
The Assessment Team has completed an overview of the classroom training and j
examination portions of the process required for MPQAD certification.
i MPQAD has established a training group specifically charged with developing i
and presenting the. required information as well as overseeing the testing of the comprehension of the classroom information. Basically, the procedure-initially N..
requires all personnel to complete courses in (1) Quality Assurance Indoc-
.trination; (2) Midland Plant Quality Procedures (MPQP) 1 and 2; and 3) Field i
Soils Organization (FSO) procedures on work and excavation permits, coordination l
forms, and emergency plans. The QA Indoctrination course discusses such topics as the site QA program and its goals, Federal regulations, general QA organization
{
and procedures, and the role of the NRC. MPQP 1 and 2 cover the specific 1
j soils related procedures to be implemented. The FSO training on work permits, excavation permits, and coordination forms explains the need for and proper use of the respective forms. The emergency plan training addresses the iden-tification of an emergency condition and the defines responsibilities in res-ponding to a given emergency. The Team reviewed the above referenced basic material and is satisfied that this training provides the proper framework to initiate specific technical and procedural training of the organization per-sonnel.
The QA personnel subsequently receive programmatic QA and QC training and are required to pass examinations on these subjects.
QC' personnel are required
-toreceivetraininginandpassanexamonthe'QCprogrammaticportiononl)".
The Team reviewed the content of these courses and exams and.has concluded
-that the necessary programmatic criteria have been met. Personnel having com-pleted these courses should have an adequate understanding of the goals and.
procedures of-Quality Assurance and the purpose and-goals of quality control-q inspections.
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NO.
14358
' Midland Plant
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~s Units 1 and 2 Independent Assessment Auxiliary Building Underpinning 4
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The training for a specific technical procedure-Project Quality Control Instruction (PQCI) - is required for all QC personnel and QA personnel i
below Level III who will perform inspections on work covered by procedure.
The format for the training to a specific PQCI consists of the preparation of a lesson plan and corresponding exam bank of questions by the training l
group. Prior to presentatien, this material is reviewed by a Soils Level III I
QA Engineer (QAE). Once the comments of the QAE are resolved, the classroom I
training is scheduled and presented. The content of the courses is a com-j bination of proced'ral and' technical information with emphasis depending upon l
u l
the subject material. Courses can last from minimum of a few hours to several days. Closed book exams, generally involving some 20 questions, are then given to the personnel. Those who receive a score of at least 80 percent pro-ceed to the on-the-job training for that particular PQCI. In all cases, in-correctly answered questions are reviewed with the applicant to assure a proper understanding. For those who fail, retesting is required after review of the i
material with the course instructor.
1 The Team specifically reviewed numerous lesson plans and more than a dozen PQCI exam banks. 'These lesson plans and subsequent exams should result in l
i MPQAD staff with a good understanding of the procedural and technical re-quirements of a particular PQCI. The lesson plans, exam banks, and the training records were kept well-organized. There is a security system in L
effect that keeps the exam questions from leaving the training room.
After completion of the on-the-job training, the final step in the certifi-cation process is a proficiency demonstration that is a " hand-on" test of j
the applicant's understanding of the inspection procedure. The portion of the certification process does not involve the speciality training group but is conducted by engineers from the Soils QA group. The Assessment Team did not witness any proficiency demonstrations this past week but have in-4 the past been present at several (refer to Weekly Reports Nos. 13, 14, 17 and i
- 18) and found these sessions to be thorough.
A Level III QA Engineer must give final approval for certification of the applicant.
The Team feels that the above approach to QA/QC training results in personnel who have a good understanding of the subject materials and who have the knowledge to carry out their duties correctly and thoroughly.
Future Assessment Team activities will' include surveillance of classroom
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training, QC proficiency demonstrations, and training records.
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.T.O.. NO. 14358
.Midicnd Pltnt
-)
Independent Assessmet.
Auxiliary Building Underpinning 5
Quality Assurance Overview of' Training of FSO Personnel (Excluding MPQAD Personnel)
The Assessment Team reviewed the administrative guideline on Field Soils Organ-ization Training. The guideline dictates that QA Indoctrination and MPQP 1 and 2 be presented to all FSO personnel and that Emergency Plans, Bechtel Field procedures and Subcontractor procedures are required for selected personnel in the organization. An organization chart is included in the guideline. The guideline identifies that a FSO Training Coordinator be named to coordinate activities and maintain training records. The Team feels that che training stipulated in the guideline adequately prepares the FSO personnel to perform in the soils remed,1al work effort. The Team also reviewed the training matrices for Resident Engineering, and two Subcontractors - Mergentime and Spencer, White and Prentise. It is the opinion of the Team that the training fulfills the procedural requirements of the Midland Plant Quality Plan and that the individuals are adequately trained for their particular level of responsibility.
A follow-up Review of the training records indicated that implementation of the procedures is being accomplished.
I Future Assessment Team effort in this area will consist of observation of the classroom training sessions and random surveillances of personnel records to insure adequate training is being obtained.
I Overview of Design Work Packages j
The Assessment Team reviewed the design work -package on Rebar Mapping and Core Drilling for Instrumentation Raceways in the SWPS. The Team found the package was generally complete with the following exceptions - (1) Drill permits were i
not stamped with the rebar mapping stamp required by an administrative guideline, (2) Final Project Engineering approval of a Field Change Request had not been obtained, and (3) The referenced FCR was difficult to understand dimensionally.
j Understanding could only be gained through indirect reference to an archi-tectural drawing. A meeting was held with the SMO groups of CPCo to discuss this package and how future work package overviews by the Team would be implemented.
Non-Conformance Identification Reports Status of previous issues:
(NIR numbers on longer listed have been closed-
-out.)
NIR NO.
Description (Opened)'
(Closed) 5 Concrete Mix 2/10/83 Qualification YN GFG Ab N 00
-Project Engineer; '
Project Manager
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INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL l
i Date: March 7, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo E. Cviki A. Lucks R. Sevo R. Visser J. Fisher W. Kilker J. Moran J. Gaydos L. Rouen Parsons i
J. Ratner I
l 1.
E. Cviki advised that trial mix preparation of the proposed concrete mix design had been completed. Results will be forwarded to Project Engineering for analysis, t
-4 2.
J. Fisher reported that Quality Control release of the jackstands j
for pier W12 had not been obtained. However, dress rehearsal ~ for load transfer is still scheduled for March 8, 1983 4
l 3
J. Gaydos reported that a study of concrete placement records indicated that the FIVP mat was done monolithically eliminating the concern to core for a " cold joint" in the concrete.
4 J. Ratner will discuss the procedure for calibrating the FIVP load r_
check jacks with L. Morris of Bechtel.
5.
P. Barry described review of work activity request package on core drilling in the SWPS. Will meet with CPCo on March 8, 1983
-l 6.
J. Ratner asked for a clarification on unique _ requirements for grout strength on the top and bottom leveling plates for pier W12.
J. Fisher will respond.
7.
P. Barry discussed the general applicability of a drawing detail on welding re-shore channels to drift sets.
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q INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: March 8, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo J. Fisner Paul Berry R. Visser D. Puhalla J. Gaydos W. Kilker J. Moran A. Scott Parsons J. Ratner i
1.
E. Cviki will respond to the request for clarification of the strength requirements for grout behind the leveling plates.
2.
Dress-rehearsal for the load transfer at pier W12 is March 9,1983 O
i 3
J. Fisher said coring of the FIVP will not be required. However, a
" mud-mat" approximately 4 inches thick has been encountered above i
the membrane and is being removed in the N-S access to piers E/W 9.
4.
J. Fisher provided a copy of a Field Instruction on " Construction Aids."
5.
J. Fisher discussed the use of excelsior between lagging in areas with no groundwater seepage with resident geotechnical engineering. Gen-erally such usage of excelsior will be avoided in the future.
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/3 INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: March 9, 1983 Attendees:
Bechtel Stene/ Webster MPOAD CPCo J. Fisher P. Barry R. Visser G. Murray J. Gaydos W. Kilker A. Scott f
Parsons i
J. Ratner 1.
J. Fisher informed the meeting that beginning March 14, 1983 Mike Blendy of the Constructability group and L. Weight the area Superintendent
.l will also attend the daily meetings.
2.
J. Fisher advised that the telltale linkage between the pier and turbine mat on pier W12 is located in such away that installation of the wedges l
will be difficult. Resident engineering will resolve.
3 In response to earlier discussions, J. Fisher said the NCR on grout at pier W12 applies to grouted care holes not to dry-pack grouting of the leveling plates.
4.
W. Kilker statad that the Team is overviewing the design work package l
that CPCo will submit to the NRC. FSO will offer support for this i
effort as necessary.
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INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: March 10, 1983
+
l Attendees:
Bechtel Stone / Webster MPQAD CPCo J. Fisher W. Kilker R. Visser G. Murray J. Gaydos l
Farsons I
J. Ratner 1.
J. Fisher provided the response from E. Cviki describing the reasons for unique grout strength requirements on different piers. Basically, it relates to the pier design and the loads on the pier.
2.
" Dress-rehearsal" for the load transfer was held March 9, 1983 However,the monitoring telltale was not installed last night. Plan is to complete l
the installation this morning and load transfer starting in the PM.
I j
3 J. Fisher said a material availability matrix is being introduced into their word processor to allow better planning.
4 W. Kilker said an interim report covering the September thru March period will be issued by the Assessment Team by the end of March.
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INDEPENDENT ASSESSMENT TEAM MEETING WITH BECTHEL Date: March 11, 1983 Attendees:
Becthel Stone / Webster MPQAD CPCo J. Fisher W. Kilker R. Visser G. Murray J. Gaydos E. Cviki
, Parsons i
J. Ratner l
1.
J. Fisher stated the FCRs on the telltale installations have been dis-I positioned. Load transfer will be today, i
1 2.
J. Fisher reported there is a welding NCR on one of the jackstands for l'
E12 that is impacting the schedule.
3 The decision has been made that NPS will perform long-term fabrication of embeds, beams and jackstands. On-site fabrication will continue for lagging and drift sets.
4.
J. Fisher stated that in response to a concern of J. Ratner, spacers on pier lagging will generally by 1)" (inch) thickness to permit back-packing and inspection.
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STONE & WEBSTER MICHIGAN, INC.
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P.O. Box 2325. Boston. M ASSACHUSETTS O2107
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United States Nuclear Regulatory Commission March 9, 1983 Midland Site Resident Inspection Office Route 7 J.O.
No.
14358 Midland, MI 48640 Ref. MPF 24 Attention Mr. R. Cook RE: DOCKET NO.
50-329/330 MIDLAND PLANT - UNITS 1 and 2 INDEPENDENT ASSESSMENT OF AUXILIARY BUILDING UNDERPINNING REPORT NO.
24 j
A copy of the Independent Assessment of the Auxiliary Building Under-pinning Weekly Report No. 24 for the period February 27, 1983 through March 5, 1983, is enclosed with this letter. Included as attachments, are the minutes of the daily meetings held during the week between mem-bers 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.
Very truly yours,
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A. Stanley Lucks 1
Project Manager
]
Enclosures I
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MAR 141993-
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14358 Midland Plant Units 1 and 2 Independent Assessment Auxiliary Building Underpinning i
Weekly Report No. 24 February 27, 1983 through March 5, 1983 Personnel on Site t
Stone & Webster Michigan, Inc.
i f
A. Lucks 3/3 - 3/4 1
W. Kilker 2/28 - 3/5 P. Barry 2/28 - 3/5 A. Scott 3/2 - 3/5 L. Rouen 3/2 - 3/5 i
Parsons, Brinckerhoff Michigan, Inc.
J. Ratner 3/2 - 3/5 Meetings Attended Date Represented Purpose 1
j 2/28 Stone'& Webster Daily Meetings through Bechtel 3/4 Consumers Power Parsons (3/3 - 3/4) 3/2 Stone & Webster Discussion of coord-Bechtel ination of Carlson Consumers Power meter installation Weiss, Janney, Elstner activities-3/3 Stone & Webster Discussion of Scope 6
NRC of Assessment and
~
Reports 3/4 Consumers Power Weekly Soils Review Bechtel Stone'& Webster Activities Construction - Pier W12: The upper and lower level bearing assemblies and
-bearing plates were installed.
Pier'W9: The 20 ft. long, 6 ft. x 8 ft. access drift was excavated and supported. The excavated material consisted of approximately a 1 ft.
-thickness of unreinforced concrete (encocntered below the turbine building mat), 2 ft. of sand fill and 5 ft. of gray clay fill. No groundwater seepage entered the excavation. Six steel drift sets were installed and wood lagging
- .j was placed between the sets and across the end of the drift. Upon completion of.the drift, the concrete mud-nat was placed in the floor of the drift and-
. access pit.
r
J.O. NO.
14358
})
Midland Plant Units 1 and 2 Independent Assessment Auxiliary Building Underpinning 2
Pier E12: No activity, j
Pier E9: The construction activities on the access drift were similar to those performed in the pier W9 access drift. The excavated material con-sisted of 9-12 inches of unreinforced concrete underlain by 1 ft. of sand j
and 6 ft. of grayish brown clay. No groundwater seepage entered the ex-cavation. The drift supports (steel sets and wood lagging) and concrete j
mud-mat were installed.
Quality' Control, Documentation and Records 1.
Witnessed the preparation of concrete trial mixes required to qualify a new mix design incorporating a " plasticizer" additive.
2.
Verified the preparation of Quality Control Inspection Records j
and Quality Assurance Inspection Reports on the access pit for piers W9/11.
3 Reviewed a revised procedure on the installation of mechanical splices that clarifies the responsibility in the field for the final splice quality.
4.
Witnessed the fabrication and inspection of pier E/W9 steel drift sets and pier W12 jackstands.
Observations Construction - The excavation of the drifts and installation of the steel i.
sets and wood lagging were done in accordance with the project documents.
Soil was used to backpack the lagging as required.
}
In the east access drift to pier E9 excelsior was inserted into the space between most of the lagging boards. The Team feels that in the absence of groundwater seepage the use of excelsior is unnecessary. The use of ex-celsior makes the inspection of the backpacking more difficult and under these circumstances is not considered to be good practice. In the north-west corner of the drift the excavated clayey material was used to fill the space between the lagging boards. Clay should not be used to backpack between the boards. However, in this instance it should not create a problem j
due to the absence of groundwater.
Quality Control, Documentation and Records - The procedures for the preparation of the concrete. trial mixes were in acccedance with project documents and industry standards. The Quality Assurance and Control records observed were properly completed.. The revision of the splicing procedure clarified the responsibility for the splice cuality.
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J.O. NO. 14358 Midland Plant Units 1 and 2 Independent Assessment Auxiliary Bruilding Underpinning 3
The completion of piers E/W12 has been impacted to a large degree by delays associated with welding and the acceptance of the welded materials by the Quality organization. The welding associated delays that have prolonged the length of time between pier excavation and load transfer to the pier is contrary to good underpinning practice. In this regard, the Team is proposing to have welding specialists perform an on-site assesscant of the shop and field welding together with the associated inspection activities.
Non-Conformance I'dentification Reports Status of previous issues: (NIR numbers on longer listed have been closed-out.)
f i
NIR NO.
Description (0pened) Date (Closed) l 5
Concrete Mix 2/10/83 Qualification 1
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M8 A,,a Project Engineer Project Manager t
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INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: February 28, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo J. Fisher P. Barry R. Sevo G. Murray E. Cvikl J. Gaydos 1.
The " dress rehearsal" for the load transfer for pierW12 has been delayed j
to Wednesday March 1, 1983 2.
P. Barry inquired as to the documentation required by the RGE when authorizing or stopping work on piers adjacent to a pier being loaded.
E. Cviki said j
the " authorization" is set by drawings or sequencing schedules so no written RGE statement is required. On the other hand, if the RGE stops work it will l
be documented in his reports.
s 3
J. Fisher said the jacks will be manned at all times when the jacks are pressurized including during the acceptance periods.
4.
J. Fisher stated that the access pit for pier W9 is completed waiting for approval t.o drift under the FIVP. The access pit for E9 is almost complete and should be completed today.. Fabrication of drift sets is proceeding and some sets should be released today. The drift under the FIVP is delayed pending discussion with the NRC regarding the minor cracks opened in the FIVP during proof-jacking.
l 5.
Bechtel will up-date the training procedure to reflect the new organization I
of personnel. This organization does not affect the Field Engineers who are in direct contact with the Subcontractor. The training record for the Field Engineers are available for review.
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~l INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: March 1, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo G. Murray J. Fisher P. Barry l
E. Cviki W. Kilker J. Gaydos i
1.
J. Gaydos gave the Team a copy of the proposed trial mix design.
P. Barry will read and comment or question as necessary.
2.
MCP 16.000 is being clarified with respect to reinforcement splicing process.
MPQAD has commented on the changes.
3 G. Murray said E12 should not be loaded until after acceptance of the soil deformation criteria on W12.
J. Fisher agreed.
4.
E. Cvikl reported that in response to an earlier question by.the Team, ref-erences to ASME requirements will be eliminated in MCP 70.000.
4 5.
J. Fisher advised that NRC approval on E/W 9 resulted in work starting last night shift on drifting under the FIVPs.
6.
J. Fisher stated that the FSO-1.000, Administrative Guideline, will be revised by March 3, 1983 l
l-7.
P. Barry questioned if MPQAD would interface with Bechtel procurement quality j
control (PQC) on inspection and acceptance of fabrication done off-site. The i
Team verified with R. Sevo that the PQC would be responsible for those off-site Li activities.
8.
W. Kilker said he would review the past Team daily meeting notes to verify if there are any open items. If so, a list will be prepared and presented at a daily meeting.
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INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: March 2, 1983 Attendees:
B(.;oel Stone / Webster MPQAD CPCo i
E. Cvi,kl P. Barry R. Sevo D. Puhalla j
W. Kilker 1
1.
E. Cviki advised that " dress rehearsal" for load tranfer at pier W12 is de-layed until further notice by J. Fisher.
2.
Trial mixes for concrete will be done today.
3 P. Barry asked about need for secondary telltale at piers E/W12.
E. Cviki replied that the secondary telltale was not required to be active until the mass excavation stage.
4.
Discussion of what maybe a layer of non-structural concrete above membrane in pier W12 drift.
E. Cviki stated that the FIVP maybe core drilled to de-termine the extent on any non-structuralconcrete and if a " cold joint" exists that could cause a failure of any concrete into the drift.
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l INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: March 3, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo E. Cviki P. Barry R. Sevo G. Murray J. Gaydos W. Kilker L. Rouen A. Scott l
A. Lucks i
Parsons J. Ratner 1.
A general discussion was held of the merits of improving early concrete and grout strength to allow quicker access to the loading of the pier.
2.
E. Cviki presented a revised schedule on load transfer to pier W12.
l 3
E. Cvikl indicated the FIVP slab maybe care drilled to determine if a
)
" cold joint" exists above the membrane level.
4.
A discussion was held of the value of insuring the accuracy of placement of Carlson meters compared to the effect on the load read-out.
A. Scott said tolerance levels being considered should be carefully evaluated.
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INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: March 4, 1983 I
I 1
Attendees:
Bechtel Stone / Webster MPQAD CPCo E. Cviki W. Kilker R. Sevo G. Murray J. Gaydos A. Lucks J. Schaub J. Fisher L. Rouen Parsons J. Ratner s
1.
J. Fisher advised that trial mixes for revised concrete mix are underway.
4 2.
E. Cviki said the NCR on pier W12 grout strength was being dispositioned.
Strength on grout for this pier is adequate. Clarification will be made on the drawing.
3 L. Rouen stated he had seen the Revision of the procedure on reinforcing splicing and that his question had been resolved.
4.
J. Fisher ~provided a new schedule for pier W12 load transfer. Sunday's work had been authorized to expedite the process.
2 5.
W. Kilker brought-up a previous item discussed in the meetings of Dec-ember 28/29, 1982. At that time, there was discussion of defining " con-struction aids" to distinguish certain items as not being part of the design.
J. Fisher will up-date on decisions regarding this subject.
6.
J. Fisher provided a copy of the revised FSO Training Program procedure.
7.
E. CViki reported that he discussed with Project Engineering the tight tolerance on Carlson meter 1 stallations. Project Engineering said that the instrumentation Subcontractor feels it needs tight tolerance and the Field group feels it can be installed to those tolerances.
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245 SUMMER STREET. BOSTON. M ASS ACH U SETTS i
ADDRESS ALL CORRESPONDENCE TO P.O. SOX 2325. SCSTON. M ASS. 02907 I
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United States Nuclear Regulatory Commission March 3, 1983 i
Midland Site Resident Inspection Office Route 7 J.O.
No.
14358 Midland, MI 48640 Ref. MPF 23 Attention Mr. R. Cook RE: DOCKET No. 50-329/330 MIDLAND PLANT - UNITS 1 and 2 INDEPENDENT ASSESSMENT OF AUXILIARY BUILDING UNDERPINNING REPORT NO.
23 A copy of the Independent Assessment of the Auxiliary Building Under-pinning Weekly Report No. 23 for the period February 20, 1983 through February 27, 1983, is enclosed with this letter. Included as attachments are (1) the minutes of the daily meetings held during the week between members of the Assessment Team and Site Engineering, Construction and Quality Assur-ance personnel and (2) the Trip Report of the Senior Level Management and Technical group from Stone and Webster Engineering Corporation and Parsons, Brinckerhoff, Quade and Douglas.
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If you have any questions with respect to this report, please contact me at (617) 589-2067.
Very truly yours, A. Stanley' Lucks Project Manager Enclosures ASL/ka p
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J.O. NO.
14358 Midland Plant Units 1 and 2 Independent Assessment Auxiliary Building Underpinning I
Weekly Report No. 23 February 20, 1983 through February 27, 1983 Personnel on Site Stone & Webster Engineering Corporation (SWEC)
B. Holsinger 2/21 - 2/26 W. Kilker 2/21 - 2/23 P. Barry 2/24 - 2/26
]
A. Scott 2/21 - 2/25 Parsons, Brinckerhoff, Quade and Douglas (PBQD)
V. Madill 2/21 - 2/25 i
Meetings Attended i
l Date Represented Purpose Il' 2/21 Stone / Webster Daily Meetings I
through Bechtel 2/25 Consumers Power Parsons (2/22 - 2/25) l Activities Construction - Pier W12: No activity.
i 1-Piers W9/11: Construction of the 6 x 6ft. access pit from El. 609 to El.600 was completed. The excavated material consisted of up to a 1 ft. thickness of unreinforced concrete underlain by sand and clay fill. The excavation was braced with wood lagging as the work progressed. Backpacking with sand was done as required and excelsior was placed between-lagging boards.. No j
groundwater was encountered. The lagging technique and materials were sia-ular to those employed in constructing the access pits to piers E/W12 (Refer to Assessment Team Weekly Report Nos. -13 and 14).
Pier E12: The Subcontractor installed lower leveling plate on the pier. Dry-pack grout was then placed in the spaces between the lower leveling plate and i
the pier,and the upper leveling plata and the turbine building mat.
-Piers E9/11: : The construction of the access pit progressed: from El. 609 to
(-
El. 603 The excavated material consisted of up to 2 ft. of unreinforced concrete underlain by sand fill. The work was done in a manner simular to that described above for piers W9/11. access pit. -No groundwater was en-l~
' cotantered.
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J.O. NO.
14358 Midland Plant Units 1 and 2 Indpendent Assessment Auxiliary Building Underpinning 2
1 Quality Control, Documentation and Records 1.
Observed load transfer training session at the Subcontractor's shop.
2.
Observed storage conditions at the Poseyville storage yard.
a 3
Witnessed the mixing and installation of dry-pack grout for the upper leveling plate at pier E12.
Observations Construction - Th'e dry-pack grouting and excavation / lagging installations l
were performed in accordance with the project documents. The dry-pack grout
- j was kept protected and moist well beyond the nominal cure time requirements.
I Quality Control, Documentation and Records - The storage conditions at the Sub-contractor's storage yard meet project requirements and are in-conformance l
with good industry practice. The grout materials were properly handled and mixed prior to installation, j
Non-Conformance Identification Reports Status of previous issues:
(NIR numbers on longer listed have been closed-out.)
NIR NO.
Description (Opened)
(Closed) 5 concrete Mix 2/10/83 Qualification
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TRIP REPORT MIDLAND PLANT - UNITS 1 AND 2 INDEPENDENT ASSESSMENT.
AUXILIARY BUILDING UNDERPINNING CONSUMERS POWER COMPANY Trip to the Midland Site Consumers Power Company By Senior Level Management Review Team February 2, 1983 f
On February 2, 1983' the members of the Senior Level Management heview Team for the independent assessment of the Auxiliary Building Underpinning visited the site. The Management Review Team consisted of:
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J. P. Allen III N. B. Cleveland J. R. Hall, Jr.
E. A. Long G. M. Schierberg L. Silano (Parsons Brinckerhoff, Michigan, Inc.)
Activities i
In preparation for our visit to the soils. remedial area we were given a short course on " Confined Space Training" by Consumers Power Company (CPCo) staff.
The Management Team was given a presentation on the underpinning work by _
3 j
J. Fisher of Bechtel Power Corporation. We were then escorted on a tour of the i
site with emphasis on all the soils remedial work and a full' account of the instrumentation program and crack monitoring being done by Wiss, Jenny, I
Elstener & Associates.
At exactly 11:00 A.M. members of the team were at access shafts to piers E-12 and W-12 where we had the opportunity to inspect the two piers.. Pier W-12 excation was completed.- Only the bell remained to be excavated on Pier E-12.
Af ter lunch, some of the members of the team visited the pier and bell mock-up
- at the Poseville Yard and CPCo used a small scale model to further describe the Auxiliary Building Underpinning. Each stage of the underpinning for the Feedwater Isolation Valve Pit, the Electrical Penetration Area and the Control Tower power portions of the Auxiliary Building were adequately explained by the CPCo engineers and the Stone & Webster - Parsons Brinckerhoff Assessment Team. There was sufficient time for many questions and these were answered satisfactorily for the Management Team.
The Independent Assessment Team described their scope of work and their day-to-day operations. The reporting mechanian was discussed and the four Nonconformance Identification Reports issued to-date were described.
Conclusions
'In-general, the overall underpinning operation is well organized. Progress.
i although slow initially, has been gaining momentum and is anticipated to accelerate..The instrumentation program is_very satisfactory. Plotting f
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of results is up-to-date and frequency of reading more than adequate. The i
Independent Assessment Team activities are being effectively carried out.
E. A. Long Chairman, Management Review Team-
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7 INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: February 21, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo J. Fisher W. Kilker R. Savo G. Murray E. Cviki A. Scott J. Gaydos I
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1.
E. Cviki stated that NIR #5 resolution is being discussed with the Team.
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In the meantime, as soon as Project Engineering makes available the mix design trial mixes will be prepared.
2.
J. Fisher said a mock-up session on load transfer will be held today at l
the Mergentime's Mechanical Shop. Later a load transfer mock-up with l
the jack stand in-place will be held at pier W12 prior to actual load l
transfer.
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W. Kilker stated the Team witnessed several increments of the Unit.No. 2 i
FIVP proorload jacking on February 19-including the initial loading, full load and load release. The activity was well-planned and sucessfully accomplished.
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4.
A. Scott requested clarification on the requirements for washers and plates
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for steel lagging bolting.
E. Cviki is' coordinating response with Project i
Engineering.
5.
A. Scott requested clarification on requirements for. concrete sampling during i
placement in terms of back of truck or end of the pump line.
E. Cviki will resolve.
6.
J. Fisher stated that dry-packing of the bearing plates on pier E12 should be done today.
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INDEPENDENT ASSESSMENT TEAM MEETING WHT BECHTEL Date: Febru.iry 1983
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Attendees:
Bechtel Stone / Webster
$PQAD CPCo J. Fisher W. Kilker F; Oliver R. Weiland E. Cviki A. Scott W2 Lytle J. saydes B. Holsinger Parsons V. Madill
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,E. Cvikl advised that trial mixes for concrete will begin February 28, 1983 B.,Holsinger described the Assessment Team' response to the proposed re-solution to NIR #5 Specifically, the proposal was to perform 3 point trial mixes for the regular concrete mix and 1 point for the plasticized a
concrete mix.
The Team agreed this was an adequate proposal but cautioned that in the future making " upward" mix adjustments could be difficult.
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2.
J. Fisher informed the group that jack-stand fabrication was delayed pend-in5'the resolution of a non-conformance on the milled surface quality.
3 W3 Kilker requested access'to the FSO training records and matrix.
J. Fisher I
stated R. Bradford ara R. Groshong were responsible for that area.
W. Kilker
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will follow-up.
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4.
B. Holringer inquired about the inspection of instrumentation installations.
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R.' Oliver will furnish required documents a'nd information.
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of the lead transfe* acceptance criteria V. Madill questioned the adequacy % per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />."J. Fish 5r will' respond.
5 of gauge monitoring "at least on V. Madill asked if ajslihht drop" its the piessur[ reading might not be a 6.
better way to recognize effectiveness'of wedge. tightening rather than listening for a " ringing" sound from hammering.
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E. Cvikl stated that\\AISC.8th Edition repaires the use of.uashers or plates j
on allslotted.noles'.QIn this regr -O vill.' pursue with Project Engineering the need for. washers / plates on non-4@ es,! r sets'of lagging.
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E. Cviki clarified the 3 equi'p tais,,* sampling concrete by reference to FSAR Revision 29, Question 42!.7'.
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4 INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: February 23, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo J. Fisher W. Kilker J. Moran E. Cviki A. Scott J. Gaydos B. Holsinger Parsons V. Madill j
1.
W. Kilker asked for a description of " seal" required between circulating l
and service water pumphouse.
J. Fisher said a diver would place a form and beutonite pellets to form the seal.
l 2.
J. Fisher said FSO & MPQAD resolved the need for re-milling jack stand l
plates. Extra work will be done today.
3 E. Cviki reported that although recording of data during the load transfer hold is only every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> (maximum), Engineering personnel will be con-tinously present throughout the period. (Response to V. Madill question i
of February 22, 1983).
4.
E. Cviki stated that acoording to Project Engineering washers or plates will be required on all slotted / bolted holes.
5.
E. "-iki said Project Engineering will take under advisement the use of correlation sampling for concrete testing.
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INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: February 24, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo D. Lavelle A. Scott R. Oliver l
E. Cviki B. Holsinger
'-l J. Gaydos 1
l Parsons __
V. Madill 1.
D. Lavelle informed those present that fabrication of the jack stands had commenced and completion was scheduled for February 28, 1983 A mock-up of the load transfer with the jack stands in place is scheduled to be held at pier W12 orrMarch 1, 1983 j
2.
A Scott questioned the amount of time that is taken to write a NCR.
Example was given to the group of NCP. No. FSO-052 written on February 22, 1983 3
B. Holsinger questioned paragraph 8.1 of the Mergentime Procedure MCP 19.000, Revision 9 as to the reascn of referencing ASME in the procedure.
4.
B. Holsinger questioned paragraph 9.3.5 of the Mergentime Procedure MCP 19.000, Revision 9 as to the method of identification of primary tensile stress so that welders and inspectors would know when this condition was applicable for weld undercut.
5.
D. Lavelle informed the group of the sequence of work forthcoming is.b'ased on the ability of MPQAD to cover the work. The work schedule was based on the need of fabrication of drift sets and lagging which require inspection to the 1980 AWS code.
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1 INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: February 25, 1983 Attendees:
Bechtel Stone / Webster MPQAD CPCo J. Fisher A. Scott R. Sevo l
E. Cv,iki B. Holsinger J. Gaydos P. Barry i
Parsons V. Madill 1.
Reference L. Roune's question on Procedure MCP 16.000, Rebar Splicing Procedure, E. Cviki stated ti.at procedure will not be tied to the ASME code for inspection since the QAR-F253 states that the splicing of rebar is not ASME.
2.
The " dress rehearsal" for the load transfer jacking of pier W12 will be held March 1, 1983 A meeting with heads of Engineering and MPQAD will be held on Monday February 28, 1983, to determine the number of men actually nec-essary to perform the work due to the area available.
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A. Scott questioned when the form tie-rod holes would be grouted for piers E/W12.
J. Fisher stated that this was under advisement at present.
18.
P. Barry & A. Scott requested a breakdown of the new organization chart in accordance to the old organization chart attached to Administrative Guideline, FSO-1.000 Revision 1.
In fact FS0-1.000 should be revised to incorporate the new chart.
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J aabaser husene M=w' asand n.jser epise g e.w om.m. sees uses rama no.4 m em mset a #m Fee *m July 7, 1983 E,
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i Mr & S Iaieks l.
Stone and Webster Michigan. In:
PO Box 2325 soston, M 02107 FILE 0485.16 SERIAL 23701 In accordance with Consumers Power Company Specification CC-100. Rev 1
" Independent Assessment of Auxiliary Building Underpinning", Section 2.1 (j),
Stone and Webster Nichigan, Inc shall expand the scope of the independent assessment of soila Remedial Activities to include the followin2 Provide an overview and assessment of activities i
I associated with all resedial soils work soc previously included in the Stone and Webster scope and placement i
of any safety related backfilt within the bounds of drawing C-45.
~t This scope revision shall become effective imediately.
i JAN/ DES /klp' l '
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