ML20092C402
| ML20092C402 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 06/14/1984 |
| From: | Lucks A STONE & WEBSTER, INC. |
| To: | Burgess E NRC |
| References | |
| MPF-90, NUDOCS 8406210166 | |
| Download: ML20092C402 (17) | |
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United States Nuclear Regulatory Corr.ission June 14,19ts Midland Sito Resident Office Route 7, J.0. No. 14358 Midland, Michigan Ref. MPF 90 Attention: Mr. B. L.
Burgess v
DOCKET NO. 50-339/330 MIDLAND PLAffi UNITS 1 & 2 INDEPENDENT ASSESSMENT OF UNDERPINNING REPORT NO. 90 A copy of the Independent Accessment of Underpinning Weekly Report No. 90 for the period of June 3,1984 through June 9,1984 is enclosed with this letter.
Included as attachments are the minutes of the daily rtcotings held during the week betwoon members of the Asocssment Team and Site Engineering, Construction, and Quality Assurance personnel.
If you have any questions with respect to this report please contact to at (617) 589-2067.
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Stanicy eks ASL/pd 0406210166 040614 JtJN 18 IW DR ADOCK 05000
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J.O. No. 14358 Midirnd Plcat Units 1 & 2 Independent Assessment of Underpinning Weekly Report No. 90 June 3, 1984 through June 9, 1984 Personnel on Site Stone & Webster Michigan, Inc.
P.
Majeaki 6/7 - 6/9 D.
Benvie 6/4 - 6/9 D.
Zito 6/4 - 6/8 W.
Kilker 6/3 - 6/5 L.
Rouen 6/3 - 6/5 Parsons Brinckerhoff Michigan, Inc.
J.
Oliveira 6/6 - 6/9 B.
Metros 6/3 - 6/5 Meetings Attended Date Represented Purpose 5/29 - 6/1 Stone & Webster Daily Assessment Bechtel Team Meeting Consumers Power Parsons Underpinning and Remedial Soils - Construction E/W5 Grillages:
Installation of the leveling and bearing plate assemblies for the three Jack locations at each grillage was completed. Fitup and welding of cross bracing is in progress.
Pier Kc8:
Concrete placement for the pier was completed.
Pier E17:
Extension of the drift to permit enlargement of the pier is in p rogress.
Piers CT 3/10: Placement of the pier shaft concrete was completed.
Pier Kc5:
Installation of the Jacks and jackstands was completed.
Pier W17:
No further activity was performed pending fabrication of lagging materials to support the enlarged shaft.
East / West Acccca Shafts:
Excavation of zones Y/Z3 (to El. 591.5) was completed.
SWPS:
Installation of the upper level wales continued on the north and west side. Excavation of the east access shaft was completed. The lower wale installation in the cast access shaft began.
BWST:
Reinforcing steel, fontwork installation and concrete placement continued.
Cathodic Protection: Trench excavation and backfilling work continued.
Assessment Team Observations - Construction Installation of the E/W 5 grillage beams and the associated hardware continued this week. The Assessment Team observed welding of the transfer beams and dry-packing of one of the upper leveling plates for the grillages. Metal surfaces
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J.O. No. 14358 Midland Plant Units 1 & 2 Independent Assessment of Underpinning 1
i were prepared and maintained dry prior to start of welding. The required preheat was attained and verified by the Contractor's welding engineer privr to start of welding. We welding technique implemented including j
weld progression and placement of multiple weld layers conformed with
]
applicable procedures. Upon completion of the weld, the required welder 4
identification was inscribed at the weld location. A visual inspection of the welds was performed by the Contractor's welding engineer. he inspection was thorough verifying that items such as weld length, throat measurement and cross sectional shape were in accordance with procedures. Prior to the start of drypacking for the upper leveling plate, the concrete surface was presoaked for 24 hrs. h e wooden forms were adequately sealed and braced to prevent any loss of drypack during installation. Small workable quantities of grout were mixed with the appropriate amount of water ensuring proper bonding of the grout without any evidence of excess water. Each grout lift l
Was rammed with a tamping rod and hammer, ensuring thorough compaction of the leveling plate grout as it was placed.
he Assessment Team observed placement of concrete for piers Kc8 and CI 3/10.
. Placement technique including lift height, lateral movement, free drop and concrete vibration conformed with good construction practice. A power failure occurred at the batch plant during concrete placement for pier Kc8, resulting in the romation of an unplanned construction joint. Be concrete surface for the joint was cleaned of all laitance and loose concrete. he surface was then roughened to achieve a suitable bond with the subsequent concrete l'
lift. Additional reinforcing dowels and couplers were installed in accordance with the design requirerents for unplanned construction joints. The Assessment
- Team concludes that the Contractor's actions associated with concrete placement for these piers was in accordance with good construction practice.
Assessment Team Observation QA/QC he Assessment Team observed offsite concrete batch plant activities associated with batching of concrete for piers CT 3/10. ne aggregate storage bins were clean, and the raterial stored in the bins were properly segregated and identified.
Aggregate samples for moisture content tests were retrieved from the accrocriate storage bins. Moisture testing of the aggregate was performed in accordance with ASIM procedures. A review of the calculations perfomed to determine the aggregate moisture content and the compensation moisture required to meet the batch design indicated that all computations were correct.
The Contractor has recently completed implementation of a computerized drawing register for design documents being used on site.
Previously, a ranual register i
had been used for control and distribution of design documents. S e primary i
advantage associated with use of the computerized register is that the register is continuously updated, providing the latest correct document status information.
In a recent FSO review of their controlled document no register errors were identified.
When the ranual system was used, updating of documents status was slow and incidence of error was more frequent. An additional advantage associated with the computerized register is that the status information for a design document including revision number, attachment infomation and distribution data has been consolidated into i
1
3 J.O. No. 14358 Midicad Pirnt Units 1 & 2 Independent Assessment of Underpinning one source. Previously, distribution data was maintained separately.
Finally, implementation of the computeri7ed register has consolidated most of the Contractor and Vendor document data into one source, alleviating the need for multiple registers. Presently, one additional register is still required for revision and distribution data associated with vendors documents. The Assessment Team believes that implementation of the computer-ized register will enhance the Contractor's ability to maintain and control the construction documents, ensuring that the appropriate design require-monts specified are implemented properly.
Work Activity Packages n e following Work Activity Packages (WAPs) overviews are in the open response stage or have been completed during the past week.
i WAP No.
Title Status (0pened)(Closed) 46 Yard Area Permanent 6/5/84 Dewatering System 87 Install Upper Dowels 6/5/84 6/5/84 at E/W FIVP Slab Nonconfomance Identificatioq Reports NIR No.
Description Status (Opened)(Closed) 26 Closure of 5/25/84 Procedural Deficiencien Open Items Items discussed during the meetings are categorized as follows:
OPEN ITEM - An item for which an action is required. Be item will remain open yntil the required action has been taken. Tracking is required.
CLOSED ITEM - An item, usually brought forward by the Assessment Team that in discussed and adequately responded to.
No tracking is required.
INFORMATION ITEM - An item brought forward to privide general background information regarding work, such as work status or e n upcoming design change.
i No tracking is required.
CLOSES ITDI -XX-XX - This notation identifies an action that closes a previously' identified open item. Tracking of the open item stops.
J.O. No. 14358 Midland Plrfit Units 1 & 2 Independent Assessment of Underpinning The following listing of all Open items from the Daily Meeting Notes with Bechtel and the text of the Weekly Reports. Carry-over items from past weeks which have been Closed this week are also listed.
Item No.
Description Closure 71-17 Cor.puterized Civil 90-18 Drawing Register 74-21 US Tescing Correcti'.e Open Action 88-25 Documentation of 90-31 Buttress Access Shaft Spall Repair 89-7 tavel C Walelcaring Open Plate Gap 89-10 Access Shaft Soldier 90-19 Piles 89-31 Retirement of "One Open Time Deviation" FCRs 90-6 SWPS Duct Bank Cracks Open 90-7 Upper Leveling and Open Bearing Plate Assembly Welds 90-9 BWST Ring Beat Addition Open in Valve Pit 90-35 Concrete Aggregate Open Testing 4h
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Notes cf Daily Meeti.y Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Carpany Held at Midland Site Midland, Michigan June 4, 1984 Present For:
Consumers Power Bechtel MPOAD Stone & Webster G.
Harray J.
Fisher R.
Sevo W.
Kilker E.
Cviki J.
McMaster D.
Beavie J.
Kelleher D.
Zito L.
Rouen Parsons Brinckerhoff B.
Metros PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Asocosment at the Midland Plant, Unito 1 & 2.
DISCUSSION Status Items Item 90 Auxiliary Building Underpinning Activivies.
Placement of the first lift of concrete for the CT 3/10 pier shafts was carpleted.
Excavation of the Y/23 zones (to El. 591.5) in the access charts was completed.
Installation of the transfer beams at all 3 Jack locations was carpleted for the E/WS grillages.
(INFORMATION ITEM)
Item 90 Computerized Cvil Drawing Register.
J.
Fisher stated that the computerized civil drawing register has been conpletely htplemented. All Contractor and Subcontractor drawings have been incorporated into the computerized drawing register.
As a result, use of the nanual register has been discontinued.
FSO will provide the Assessment Team access to a copy of the register. (Item 71-17 remains OPEN)
(INFORMATION ITEM)
Item 90 Auxiliary Building Access Shaft Soldier Piles.
J.
Fisher reported that the FCR describing remedial action for extension of the two short soldier piles in each access shaft to the top of the buttress access. shaft footing has been issued.
(Item 89-10 remaino OPEN) (INFORMATION ITEM)
New Items
I Notes cf Daily Meeting Independent Assessment of Underpinning
)
Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan June 4, 1984 Item 90 US Testing Requirements for Concrete Testing.
With respect to an NCR written against the testing of sand at the concrete batch plant,L.
Rouen asked if Bechtel is responsible for directing the concrete testing activities of US Testing.
J.
Fisher responded that concrete testing activities of US Testing are governed by the engineering
- pecification for concrete placement and testing. We type, number and timing of the tests are dictated by the specifications, not Bechtel field supervision. Bechtel field supervision may request additional tests as needed, but US Testing must meet testirg requirements contained in the appropriato specifications as a trinimum.
(CLOSED ITEM)
Item 90 Concrete Testing NCR.
With respect to an NCR written because a concrete air entrainment test was taken at the improper location, L.
Rouen asked for details on the MPQAD activity at the time.
J.
McMister replied that the QC inspector was overviewing the US Testing effort. We inspector did consult the applicable i
specifications but did not irrrr.ediately locate the reference to location of
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testing. Subsequently, it was verified that the test should have been taken at the placement location, not at the truck discharge.
(NIH // 26 retrains OPEN)
(CIOSED ITEM)
Item 90 SWPS Duct Bank Cracks.
E.
Cviki reported that cracks had been found in the most easterly duct bank near the SWPS north wall. The crack consultant, CTL, will be reviewing the cracks.
D.
Benvie requested that the Assessment Team be provided with a copy of the CTL surrary report once it is issued.
E.. Cviki will respond.
(OPEN ITEM)
Item 90 Upper Leveling and Bearing Plate Assembly Welds.
B.
Metros asked why the smaller weld recently approved for use on the upper leveling and bearing plate assemblies is not being used.
J.
Fisher will respond.
(OPEN ITEM)
Item 90 Contingency Jacking.
R.
Sevo asked which procedure will be used if contingency jacking is require.1 due to differential movement at the Control Tower / Turbine Building interface.
4 J.
Fisher responded that if differential movement between these structures t
exceeds 0.5 in, the Subcontractor's procedure for pier Jacking will be implemented.
(CLOSED ITEM)
r Notes cf Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Car.pany Held at Midland Site Midland, Michigan June 4, 1984 Item 90 BW3T Ring Beam Additions at the Valve Pit.
D.
Zito discussed the portion of the ring beam addition inside both of the BW3T valve pits.
Mr. Zito asked what construction techniques will be used to allow concrete vibrator access and to assure there are no gaps where the top of the ring beam addition will interface with the extisting valvo pit roof slab.
J.
Fisher will respond.
(OPEN ITEM)
Item 90 E5 Crillage Bearing Plate Smoothness NCR.
W.
Kilker asked for a clarification on the nonconforming condition and disposition on an NCR written against the surface condition of two bearing plates at a E5 grillage beam jacking location. The NCR appeared to contain loco specific information on the non-conforming condition than is normally presented and the disposition was such that the need for a smoothness criteria was left in-doubt.
E.
Cviki will verify the details of the resolution of this NCR and respond.- (OPEN ITEM)
Response Items No response items were discussed.
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< Notes cf Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site' Midland, Michigan June 5, 1984 Present Fo":
, Consumers Power Bechtel MPOAD Stone & Webster G.
Murray J.
Fisher R.
Sevo W.
Kilker J.
Schaub E.
Cviki J.
McMaster D.
Bonvio J.
Ko11eher D.
Zito L.
Rouen Pnrsons Brinckerhoff B.
Ehtros PURPOSE This mooting is held each day to discuss items regarding the Independent 3o113 Assosamont at the Midland Plant, Units 1 & 2.
_ DISCUSSION Statui_ Items Item 90-1,1,-
Auxiliary Building Underpinning Activitics.
Reinforcing stool installation was completed for pice Kc8.
Drypacking of the upper loveling plato for the X jack location was completed at thof E5 grillage.
1 Placement of the last lift of concreto for the CT 3/10 piers is scheduled for tomorrow.
(INFORMATION ITEM)
Item 00 SWPS Undorpinning Activition.
J.
Fisher reported that installation of the lower lovel Walo in the vicinity of the SWPS north 4st corner is'acheduled to begin tomorrow.
(INFORMATION ITEM)
,, Item 90 Incorporation of "One Time Deviation FCRs".
J.
Kolleher discussed incorporation of "ono timo deviation" FCRs onto the drawings.
Incorporation of previous "ono tino deviation " FCho is in process.
1hin work is being accortplished in accordance with administrativo guidelines.
Field and project engineering doeutrento control proceduros are presently being updated to provido guidelinos for incorporating this type of FCR in the futuro.
Theco updated proceduros will contain the critoria for dotormining whether an FCR will bo incorporated directly onto the drawing or incorporated by referenco with n brief description.
(Item 89-31 remnins OPEN) (INFORMATION ITEM) y
Notes cf Daily Meeting Independent Assessment of Underpinning Midland Plant Units 1 & 2 Consumers Power Company Hold at Midland Site Midland, Michigan l
June 5,1984 Item 90 Ring Beam Addition in Valvo Pit.
J.
Fisher discussed the original planned method of concreto placement for the portion of the ring beam addition inside the valvo pit at each BWST.
After placing concrete in the bottom portion of the bean, addition, the Contractor planned to grout the corraining portion through holes drilled in the valvo pit roof slab, but Engineering did not approve the use of the grout. As a result, the Contractor is evaluating alternate placement methods.
(Iterc 90-9 retrains OPEN)
(INFORMATION ITEM)
Item 90 SWPS Duct Bank Cracks.
E.
Cviki recorted that the crack consultant, CTL,will begin their ovaluation of the duct bank crack at the SWPS north wall. Their preliminary investigation does not indicato that the crack resulted frort differential settletront totwoon the SWPS and the duct bank. Dio actual cauco is still under invest-Igation.
(Item 90-6 retrains OPEN)
(INFORMAITON ITEM)
Now Iterrs
_ Item 90 UAT Lateral Wo11 points.
J.
Fisher reported that water level readings taken at piezomotor 08-2 indicato that the porched groundwater lovel boncath the control tower is retraining stable at El. 584
't.
As a result, use of the UAT lateral wollpointo has boon discontinued.
(INFORMATION ITEM)
Penronce Item Itom 90 E5 Crillago Boaring Plato Smoothnosa NCR.
E.
Cviki responded to the Assessment Team question concerning clarification of an NCR written ngainst the surface condition of two bearing plates at the ES grillages. Mr. Cvik1 stated that Rosident Engineering had perfortrod a visual insroction of the platos prior to dispositionim the NCR. Dio visual inspection dotorttined that although the ortoothness critorin for the boaring surfaces had not boon rtet, the actual surface condition was capable of satisfying the loading requirements. The NCR disposition will be revised to reflect results of the visual inspection perforttod by Resident Engineering.
(CLOSFa ITEM 90-10) itfgt40 Corrputerized Civil Drawing Register.
Die Assosotront Tearn has corrpleted a review of the cortputerized drawing register l
which is being irrplorrented for control and iraintenaneo of Contractor and Sub-contractor drawings. Dio register infortration for Contractor drawings includos tirawing numbor, title, revision nurtbor, attachtront inforvation and distribution schedules.
Viis carro inforvation for vondor drawings with the exception of i
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- Note 2 of Daily Meeting Independ:nt Assessment of Undsrpinning l ~--
Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan June 5, 1984 X
-distribution data is contained on the register. Central Document Control A
updates the register on a daily basis ensuring that the latest document
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data is available. The Assessment Team believes that implementation of the computerized register will serve as a useful tool for c'ontrol s
and maintenance of the controlled documents on site.. Implementation of this system site wide will ensure a more uniform approach for controlling
. distribution and maintaining construction drawings.
(CLOSES ITEM 71-17)
Item 90 ~ Auxiliary Building Access Shaft Soldier Piles.
The Assessment Team has reviewed the FCR which contains the redesign for extension of the two short soldier piles in each acce'ss shaft. The piles will be extended to the top of the buttress access shaft footing by welding a wide flange section to the front of the existing soldier piles as required.
'Once the wide flange sections have been added, lagging and backpacking will be installed in accordance with.the design requirements. The Assessme +
Team concurs with the remedial action taken to extend the soldier piles.
(CLOSES ITEM 89-10) s s
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- Notes of. Daily Meeting Independ: Int Assessment of Und:rpinning
. Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site
-Midland, Michigan June 6, 1984 Present For:
Consumers Power Bechtel MPQAD Stone & Webster G.
W rray J.
Fisher R.
Sevo D.
Benvie E.
Cvikl J.
McMaster D.
Zito J.
Kelleher Parsons Brinckerhoff J.
Oliveira PURPOSE i
. This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION
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Status Items Item 90-20
. Auxiliary Building Underpinning Activities.
Extension of the two short soldier piles in the west access shaft to the top of the buttress access shaft footing has begun.
Regrouting of the Kc5 upper leveling plate was completed.
Placement of the pier Kc8 concrete is scheduled for today.
(INFORMATION ITEM)
Item 90 BWST Ring Beam Addition in Valve Pit.
J.
Fisher discussed proposed methods which are being evaluated to place concrete for the portion of the ring beam addition within the valve pit at each BWST. The " C ractor has proposed that a pea gravel concrete mix be used to ease plmcement in this confined area of the ring beam addition.
Another modification being considered includes drilling additional holes in the valve pit roof slab to increase access for the concrete vibrators into the placement area.
(Item 90-9 remains OPEN) (INFORMATION ITEM)
New Items Item 90 Diesel Generator Building Crack Evaluation.
G.
Murray reported that a supplemental engineering survey requested by the NRC staff to evaluate cracking in the diesel. generator building will begin in the near future.
(INFORMATION ITEM)
Item 90 Excavation Slopes for the Unit 2 HVAC Foundation Pad.
D.
Benv u discussed the excavation for the Unit 2 HVAC foundation pad. One of the (soivation slopes had been excavated at or near vertical for its entire height c' d to 10 ft. It was noted that the underpinning subcontractors crane operating within 5 ft. of the top of the vertical slope may be adding sur-charge loading to the soil which could cause soil sloughing and possibly e
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n Notes of D2ily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2-
- Consumers Power Company Held at Midland Site Midland, Michigan June 6, 1984 damage the installed duct line and concrete formwork. Additionally, partial
.underr.ining of the' vertical soil slope and the proximity of the duct bank to the slope will prevent proper compaction of the backfill during placement.
Mr. Benvie asked the Contractor to evaluate these conditions.
J.
Fisher will respond.
(OPEN ITEM)
Item 90 MPQAD Staffing for_ Underpinning.
J.
Oliveira noted that the Assessment Team had learned from Bechtel and MPQAD that the attrition rate for Remedial Soils QA/QC staff has increased. Mr.
- Oliveira asked if consideration is being given to consolidating QC hold points in response to the decreased staffing levels.
It was stated that there are no
. plans to consolidate QC hold points. MPQAD is in.the process of reassigning and training MPQAD Balance of Plant personnel to replace Remedial Soils QA/QC inspectcrs who have left. Additionally, Bechtel is evaluating the schedule for underpinning work activities in order to minimize possible impact.
(CLOSED ITEM)
Item 90-25
~ Installation of Contingency Jacks.
J.
Fisher. reported that installation of contingency jacks at the interface of the turbine building and control tower is scheduled to begin within the next week. Then jacks will only be used if differential settlement between the control tower and turbine' building exceeds 0.5 in.
(INFORMATION ITEM)
- Response Items
-No response items.were addressed.
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'. Note 2 of Daily Meeting
'Ind: pendent Assessment of Undcrpinning Midland. Plant, Units.1 & 2
. Consumers Power Company Held at Midland Site Midland, Michigt.n June 7, 1984 Present For:
' Consumers Power Bechtel MPQAD Stone & Webster
'G.
Murray J.
Fisher R.
Sevo D.
Benvie E.
Cvik1 J.
McMaster D.
Zito J.
Kelleher Parsons Brinckerhoff None PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 90 Auxiliary Building Underpinning Activities.
Placement of concrete for pier Kc8 began yesterday. Due to a power outage, concrete placement was only completed to El. 592.75. As a result a cold-joint a s formed for the pier shaft. 'Ihe remaining concrete will be placed.
tomorrow.
' Grouting of all 3 upper leveling plates at each of the E/WS grillages was completed.
Load transfer for Kc5 is scheduled for tomorrow.
(INFORMATION ITEM)
Item 90 SWPS Underpinning Activities.
J.. Fisher reported that installation of the lower level bracing at the northeast corner of the SWPS has begun.
(INFORMATION ITEM)
Item 90 SWPS Duct Bank Cracks.
J.. Fisher reported that a conditional release'had been issued to allow chipping of the duct bank concrete in the area of the cracks. The chipping is being done to allow an evaluation of the cracks.
It is also planned to excavate in a localized area beneath the duct bank /SWPS north wall interface to provide additional information.
(Item 90-6 remains
'OPEN)
(INFORMATION ITEM)
JNew Items Item 90 Weekly Report # 89.
'Ihe text of Weekly Report # 89 was reviewed. It was determined that all open items had been previously identified.
(IN NRMATION ITEM)
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-Not s of Daily Meeting Independent Assessment of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan June 7, 1984 Response Items
' Item 90 Excavation Slopes for the Unit 2 HVAC Foundation Pad.
J.
Fisher responded to the Assessment Team question concerning vertical soil-slopes for the HVAC foundation pad excavation. Access of the under-pinning subcontractors' crane to the excavation slopes has been restricted in order to prevent surcharge loading of the soil. The slope will be layed back and braced as needed to ensure its' stability. Undermined areas will be removed during layback of the slope to provide access for compact-ion equipment during backfilling. The Assessment Team concurs with this course of action.
(CLOSES ITEM 90-23)
Item 90 Documenetation of Buttress Access Shaft Spall Repair.
E.
.Cviki responded to the Assessment Team question concerning documenta-tion of the Safety Concern Evaluation Report (SCER) content associated with concrete spalling on the Buttress Access Shaft wall. The SCER re-quired that the torque of the rockbolts for the Level C bearing plate closest to the spall area be verified and the concrete within the spalled area be removed. Since this structure is non Q, MPQAD documentation is not required. However, a field engineers report was prepared to document the results of the rock bolt load verification. In addition, a concrete drill permit was prepared to allow removal of the concrete in the spalled area. The field engineer's report and the concrete drill permit have been attached to the SCER as permanent documentation of the work. The Assessr.ent Team believes that the SCER content and recommendations have been adequately documented. (CLOSES ITEM 88-25)
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Notea of Daily'Me;, ting g.
'Ind: pendent Ass;ssment of Und;rpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site N1dland, Fuchigan June 8, 1984 Present For:
Consumers Power Bechtel MPQAD Stone & Webster G.
Murray J.
Fisher R.
Sevo D.
Benvie R.
Wheeler E.
Cvikl J.
McMaster D.
Zito J.
Kelleher P.
Majeski Parsons Brinckerhoff J.
Oliveira PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assess.ent at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 90 Auxiliary Building Underpinning Activities.
Concrete placement was completed for piers CT 3/10.
Installation of Jacks and jackstands was completed for pier Kc5.
-(INFORMATION ITEM)
New. Items Item 90 SWPS Phase II Cofferdam Subgrade.
D.
Benvie discussed excavation of the SWPS Phase II cofferdam.
It was noted that if over-excavation is required below design subgrade for the pipe bedding, s.
additional bracing and/or layback of the excavation slopes will be required.
Mr. Benvie asked if a visual inspection of the soldier pile sheeted pit excav-ations is planned in order to make a preliminary evaluation as to the accept-ability of the subgrade at this elevation.
E.
Cvikl responded that there is no fonnal requirements to inspect the sheeted pit excavations. Hotiever, visual examination of.the sheeted pits will be performed to assist Resident Engineering in their evaluation of the pipe bedding subgrade for acceptability.
(CLOSED ITEM)'
Item 90 MPQAD Organization Chart.
J.
Oliveira requested a copy of the MPQAD organization chart showing a schedule breakdown with staffing level for the work shifts.
J.
McMaster will respond.
(OPEN ITEM) 9
Not:s of Daily Meeting Ind:p:ndent Assessment of Underpinning Midland Plant, Units 1 & 2
' Consumers Power Company Held at Midland Site Midland, Michigan June 8, 1984 Item 90 Concrete Aggregate Testing.
P.
Majeski asked what concrete aggregate testing data is required prior to batching of concrete..
J.
Kelleher responded that the aggregate mositure content data is required to determine proportions of the concrete batch mix.
It was noted that the mositure content data sheet for concrete batched on 5/28/84 which was placed for the CT 3/10 pier bells had not been signed off prior to concrete batching.
Mr. Majeski asked MPQAD to determine if the moisture test results had been adequately reviewed prior to concrete batching.
J..
McMaster will respond.
(OPEN ITEM)
Response Items No response items were addressed.
W