ML20095E245
| ML20095E245 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 06/27/1984 |
| From: | Lucks A STONE & WEBSTER, INC. |
| To: | Burgess B NRC |
| Shared Package | |
| ML20095E223 | List: |
| References | |
| MPF-92, NUDOCS 8408240138 | |
| Download: ML20095E245 (16) | |
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3R tA FILE United States Ndclear Regulatory Comission June 27, 1984 Midland Site Resident Office Route 7, J.O. No. 14358 Midland, Michigan Ref. MPF 92 Attention: Mr . B. L . Burgess DOGET No. 50-339/330 MIDLAND PLANT UNITS 1 & 2 INDEPENDENT ASSESSMENT OF UNDERPINNING REPORT NO. 92 A copy of the Independent Assessment of Underpinning Weekly Report No. 92 for the period of June 17, 1984 through June 23, 1984 is enclosed with this letter. Included as attachments are the minutes of the daily meetings held during the week between members of the Assessment Team and Site Engineering, Construction, and Quality Assurance personnel.
If you have any questions with respect to this report please contact me at (617) 589-2067.
. -O b-A. StanleyLu(cks Project Manager Enclosures ASL/pd
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l JJHarrison (enc), US NRC Glen Ellyn, IL
- Grace Dow Memorial Library (enc) l DQuame (ene) CPCo Midland (site)
- JMooney (enc) CPCo Jackson JMeisenheimer (ene) CPCo Midland (site) l l
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J.O. No. 14358
. Midland Plant Units 1 & 2 Independent Assessment of Underpinning Weekly Report No. 92
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- June 17, 1984 through June 23, 1984 Personnel on Site Stone & Webster Michigan, Inc.
P. Majeski 6/19 - 6/23 D. Benvie 6/18 - 6/23 D. Zito 6/18 - 6/22 W. Kilker 6/17 - 6/22 L. Rouen 6/17 - 6/19 Parsons Brinckerhoff Michigan, Inc.
B. Metros 6/17 - 6/19 Meetings Attended Date Represented Purpose 6/18 - 6/22 Stone & Webster Daily Assessment Bechtel Team Meeting Consumers Power Parsons 6/22 Stone & Webster Project Soils Bechtel Meeting Consumers Power MPQAD Underpinning and Remedial Soils - Construction E/WS Grillages: Initial load transfer is in progress.
Pier Kc8: Initial load transfer and subsequent routine rejacking was completed.
Pier E17: Extension of the drift to permit enlargement of the pier is in progress.
Piers CT 3/10: Initial load transfer is in progress.
Piers CT 5/18: Drifting to these piers is underway.
Pier E/W3: Finger drifting to these piers is underway.
Pier W17: Enlargement of the initial pier shaft to accommodate the redesigned pier is in progress.
Lateral Bracing System: Removal of concrete from the buttress access shaft walls to allow installation of embedded strut plates for support of the E/W 10 struts is in progress.
'SWPS: Excavation below the upper level wales has begun in the west access shaft.
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BWST$: Reinf5ccihg ste'e[hormwork installation and concrete placement {
continued.
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" Cathodic Proteciion: ;7rer.:h excavation and backfilling work continued.
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Assessment Team Observations - Construction he Assessment Team observtc jacking operations for the CT 3 pier and the E5 grillage and a check of* the tension for the FIVP support tie rods. The rate, increments, and duration of loadirt conformed with the appropriate i procedures. When the' maximum allowable upward movement of the EPA occurred !
during initial loading of the E5 grillage, Jacking loads were reduced to the specified value for this condition. Once Resident Engineering had evaluated
~tne movement and determined that its impact on the Control Tower and EPA was miriimal, the remainder pf the load transfer was accomplished as prescribed ,
in the procedures. ,ha MVP support tie rods were checked and retensioned ;
as required in response bo the u; ward building movement at this location. '
The co-ordination exhibited by the Subcontractors, FSO and Resident Engineering i during the complex jacking and monitoring operations associated with the CT 3 :
pier and ES grillage showed that these organizations were, thoroughly aware of l the procedural requiNments and were appropriately prepared for contingencies.
No detrimental? building movement occurred during these loading operations.
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. We Assessment Team observed pre-placement and placement activities associated with concrete placement for W Kc4 and Kc5 drift invert. The subgrade was !
adequatelylevadand sufficintly dampened) to preclude loss of moisture from the concrete during placemedt. De reinforcing steel and embedments were
- properly placed and secured in onnfonunce with the design documents and the controlling concrete grade was sufficiently marked on the forms around the i periphery of the placement area. She concrete was propdly vibrated during
,placement, resulting in a satisfactory installation. p [
Re Assessment Team observed /nstallation of strut plateroik bolts and grouting of struts plates for the lower l level bracing in the SWPS east access shaft. The
. required drill permits were Un place prior. to the start of work. The core drilling machine was adequattlf braced at each location to ensure the required i 1 drill hole orientatic1 was Elintained!g he depth of drilling was constantly '-
i monitored, preventing t!nel pmsibility of overdrilling. Placement of grout for j the strut plates was in'secordance.with procedures. Proportions of grout
! constituents used conformed with ~ design requirements and the duration of mixing was satisfactory to ensbre thorough bien' ding of the_ grout constituents. Once the grout placement began, the operation continued without interruption, preventing. segregation or. bleeding of the; grout. .Be finished surfaces were i '
cured with moist rags, completing the satisfactory grouting operations.
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!. Assessment Team Observations - QA/QC y he Assessment Team reviewed a report'sumarlring the Contractors' Quality
- Engineering review of the Auxiliary Bui1 ding Subcontractors activities associated
! with material and storage building. This rev:ew was initiated as a result of ,
l damage during onsite storaga to the teflon tear.tng pads for the CT 3/10 transfer
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3 J.O. No. 14358 Midland Plant Unita 1 & 2 Independent Assessment of Underpinning frames. The Assessment Team believes that initiation of this review was responsive on the part of the Contractor. However, a number of findings resulted during'the review; including improper identification of material and storage areas, improper storage of material, and the use of personnel not trained to the procedures for handling and storage of materials. A QAR was initiated by the Contractor to document corrective action implemented to address the deficiencies noted in the review. It is the opinion of the Assessment Team that more diligence is required on the part of the Subcontractor and MPQAD to ensure that material storage and handling requirements are properly implemented to prevent the inadvertent use of construction materials which do not meet quality standards and to minimize material damage during onsite storage.
FSO has completed the June review of their controlled documents. All documents with attachments were reviewed. Out of a total population of 2,150 documents, 10 deficiencies were found. Eight of the deficiencies were due to missing attachments or inadvertent posting of unnecessary attachments to documents. The remaining two deficiencies were register related errors. The error rate of approximately 1'4 indicates that FSO is adequately maintaining their controlled documents.
While reviewing documentation to the WS grillagein preparation for loading, MPQAD determined that weld inspection of a base plate shear lug for one of the grillage
. support columns had not been performed. Inspection of the lug was initiated by MPQAD, but upon identification of an apparent preheat nonconformance, the inspection was not completed. Upon disposition of the nonconformance and liftin6 of the Hold Tag, FSO mistakenly thought that the inspection had been entirely completed as required.by MPQAD procedures and released the column for erection. Since the nonconforming material had been installed, a difficult and time consuming disposition was required. Had the MPQAD inspector completed his original inspection, this situation would not have occurred.
MPQAD responded to an Assessment Team question regarding the initiation, preparation and closing of three QC Inspection ~ Reports. The Assessment Team is satisfied that the Inspection Reports were prepared in accordance with the appropriate procedures.
However, the Assessment Team's question would not have been necessary if annotation of the documents was performed to clarify exceptional situations. The Assessment Team believes that QC inspectors should be cognizant that future reviewers of quality records may not be fully aware of exceptional situations and short notes included within the reports will facilitate future use.
Work Activity Packages The following Work Activity Package (WAPs) overviews are in the open response stage or have been completed during the past week.
WAP No. Title Status (Opened)(Closed) 46 Yard Area Permanent 6/5/84 Dewatering System 81 Level D Wales - Excavate 6/20/84 6/21/84 Zones Y/Z 4A thru D, Kc Slope Layback 85 Tiebacks and Struts 6/20/84 at Piers E/W 2 thru 9
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' J.O. No. 14358 ,
Midland Pltnt Units 1 & 2 s
. Independent Assessment of Underpinning 4
Nonconformanc~g Identification Reports
. 'Ihe following Nonconformance Reports (NIRs) remain open or have been closed during the week; NIR No. Description Status (Opened) (Closed) 26 Closure of 5/25/84 Procedural Deficiencies open Items ,
Items discussed during the meetings'are categorized as follows:
OPEN ITEM - An item for which an action is required. The item will remain open until the required action has been taken. Tracking is required.
CLOSED ITEM - An item, usually brought forward by the Assessment Team that is discusshd and adequately responded-to. No tracking is required.
INFORMATION ITEM - An item brought forward to, provide general background information regarding work, such as work status or an upcoming design change.
No tracking is required.
OPINION ITEM - An opinion or suggestion' is given by the Assessment Team expressing an alternate construction or quality assurance technique. The opinion or suggestion is given as a possible Lalternate that may facilitate m an operation.
CLOSES ITEM -XX-XX - This notation identifies an action that closes a previously
't identified open item. Tracking of the open item stops.
Die following listing of all Open items from the Daily Meeting. Notes with Bech tel 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
! 74-21 US Testing Corrective Open Action 89-7 Level C Wale Bearing Open Plate Gap ,
, 89-31 Retirement of "One Open
,s Time Deviation" FCRs Open
"; 90-6 SWPS Duct Bank Cracks 90-9 'BWST Ring Beam Addition 92-29 in Valve Pits ,
91-7 ,
Pier Kc5 Bearing Plates Open D ..e
- 5 J.O. No. 14358 Midland Plant Units 1 & 2 Independent Assessment of Underpinning
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Item No. - Description Closure 91-21 ._ MPQAD Inspection Open Reports for Concrete 91-23 Material Storage and 92-9 Handling Procedures Audit 92-14 MPQAD Monitoring of Open Materials Handling and Storage 92-24 FCR Task Force Update Open N ~
hV $buc/CS Pf6 ject Engineer Pit 6 ject Man 1ger
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Note] of Daily Me: ting Ind: pend:nt Assc;s. 4t of Und:rpinning
. Miditnd Plant, Unita 1 & 2 Consumers Power Company
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Held at Midland Site Midland., Michigan June 18, 1984-Present For: ;
Consumers Power Bechtel MPQAD Stone & Webster G. Murray J. Fisher J. McMaster D. Benvie E. Cvikl D. Zito J. Kelleher L. Rouen W. Kilker Parsons Brinckerhoff B. Metros PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 92 Auxiliary Building Underpinning Activities.
The E/W5 grillages were ready for load transfer pending resolution of an NCR written on the inspection of a column shear lug.
Pier CT 3 will be available fcr load transfer on 6/19. However, pier CT 10 will be delayed until 6/20/84 awaiting upper leveling plate grout cure.
The load transfer sequence for the above mentioned pier grillages is CT 10, CT 3 and E/WS grillages.
Pier Kc8 load transfer was initated on 6/17184.
(INFORMATION ITEM)
New Items Item 92 FSO Document Control "Self-Audit".
J. Fisher reported that ESO has completed another self-audit of their document control records. The report will be available to the Assessment Team on 6/20/84 (OPEN ITEM)
Item 92 SWPS Access Shaft Area Erosion.
W. Kilker requested that ESO report on any effects of the heavy rainfall of 6/17/84 on soils in the vicinity of the SWPS access shaft excavation. J. Fisher will respond. (OPEN ITEM)
Response Items No response items were addressed.
Notea qr Daily Mesting Ind; pendent A;;; smen* 'T Undsrpinning Miditnd P1rnt, Units . a 2 ,
Consumers Pow;r Company Held at Midland Site Midland, Michigan June 19, 1984 ,
Present For:
Consumers Power Bechtel MP0AD Stone & Webster G. Murray J. Fisher J. McMaster D. Benvie J. Schaub E. Cvikl R. Sevo D. Zito J. Kelleher L. Rouen W. Kilker Parsons Brinckerhoff B. Metros PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 92 Auxiliary Building Underpinning Activities.
Concrete placement fbr the Kc4 to Kc5 drift invert is scheduled'fbr today.
Load transfer for pier CT-10 is scheduled for today and pier CT 3 far tonight.
(INFORMATION ITEM)
Item 92 SWPS Building Underpinning Activities.
J. Fisher reported that excavation in the SWPS west access shaft began yesterday.
Grouting of the lower level strut plates in the vicinity of the SWPS northeast corner is scheduled to be completed today in preparation far excavation of pier No. 1. (INFORMATION ITEM)
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New Items Item 92 Near Term Auxiliary Building Underpinning Work Activities.
J. Fisher stated that upon completion of initial load transfer for the CT 3/10
' piers and the E/WS grillages, the following work will commence:
- 1. Drifting to piers CT 5/8.
- 2. Mass Excavation between E/W5 and E/W8 grillages to El. 600'*.
- 3. Excavation of piers E/W3.
(INFORMATION ITEM)
Item 92 Welding of the Lower Bearing Plates.
B. Metros discussed welding of the lower bearing plates for the piers. It was noted that during welding of the Kc5 lower bearing plates, some of the weld material _had been deposited within a small gap between two of the plates. The
Nota 3 of Daily Mea .g Ind: pendent A ccsment of Und:rpinning Midland Plant, Units 1 & 2
, Consumers Power Company Held at Midland Site Midland, Michigan June 19, 1984 weld metal prevepted a complete closing of the gap during subsequent pier loading.
Mr. Metros stated that if welding of these plates had been performed after load transfer, this situation would not have occurred. (OPINION ITEM)
Response Items Item 92 SWPS Access Area Erosion.
J. Fisher discussed the soil erosion in the vicinity of the access shaft which resulted from heavy rainfall on 6/17/84. Erosion of the in-situ sand and back-packing had ccourred in several areas adjacent to the access shaft soldier pile wall, especially in the' vicinity of the SWPS east side. A protective berm and sumps had been installed along the north side of the SWPS as a result of previous erosion associated with surface runoff from heavy rainfall. However, the protect-ive berm was not installed along the east side of the SWPS. Additionally the sumps were not activated soon enough to prevent water flow over or through the protective berm. Remedial action presently underway includes repacking all eroded areas behind the soldier pile wall with clay and/or sand as cirected by the resident geotechnical engineer. To guard against future erosion, the protective berm will be extended around the east side of the SWPS and more sumps will be added. Also, the addition of automatic float devices to the existing sumps is being considered.
FSO rield engineers have been reinstructed as to the need for close monitoring of the sumps during inclement weather to ensure that pumps are activated when needed. (CLOSES ITEM 92-3)
Item 92 Material Storrde and Handling Procedure Findings.
J. Fisher provided the Assessment Team with a copy of the FSO Quality Engineering audit report associated with the Subcontractor's material storage and handling procedures. The report findings and necessary corrective action will be discussed with the Subcontractor today. (CLOSES ITEM 91-23)
.Not2a of Daily Meeti '
Independent Ass ssme..., of Und:rpinning Midtrnd Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan June 20, 1984
- Present For: ;
Oonsumers Power Bechtel MPQAD Stone & liebster G. Murray J. Fisher J. McMaster D. Benvie R. Wieland E. Cviki R. Sevo D. Zito J. Kelleher W. Kilker P. Majeski Parsons Brinckerhoff None PURPOSE Ihis meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 92 Auxiliary Building Underpinning Activities.
Load transfer fbr piers CT 3/.10 has been delayed pending resciution of several NCRs.
Placement of concrete was completed for the Kc4 to Kc5 drift invert.
Enlargement of the W17 pier shaft has begun.
Installation of reinfbreing steel and embedments was completed in preparation for concrete placement at the Kc8 to Kc9 drift invert.
Pier Kc5 was locked off.
(INFORMATION ITEM)
New Items Item 92 Piers CT 6/7 Drifting Sequence.
J. Fisher reported that Engineering is presently evaluating the possibility of extending the CT 5/8 drifts once these piers are constructed to allow access to the CT 6/7 piers. The original construction sequence showed that access to the CT 6/7 piers would be gained from the CT 13/15 drift. (INFORMATION ITEM) l l Item 92 NRC Monthly Meeting.
G. Murray stated that the NRC June monthly meeting which was postponed last week will not be rescheduled. The agenda for this month 's meeting will be combined with the July agenda. (INFORMATION ITEM) l t
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Not:s of Daily Mect 3
, Ind: pend nt As :ssmeat of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan June 20, 1984 7
Item 92 Material Handling and Storage Findings.
W. Kilker requested the status of corrective action implementation to address the FSO findings associated with the underpinning Subcontractor's handling and storage of material. J. Fisher responded that the Auxiliary Building Sub-contractor is in the process of correcting deficiencies noted in the review.
Additionally, a QAR has been initiated to document corrective action undertaken.
FSO will conduct a similar review of the SWPS Subcontractor's storage activities.
(CLOSED ITEM)
Item 92 MPQAD Monitoring of Material Handling and Storage.
W. Kilker asked what are MPQAD responsibilities associated with monitoring of the Subcontractor's material handling and storage activities, (i.e. audit frequency, date of last audit) J. McMaster will respond. (OPEN ITEM)
Item 92 Impact of Ongoing Work on Jacking Activities.
D. Zito discussed the impact of current work activities on the upcoming jacking associated with the CT 3/10 piers and E/W5 grillages. It was noted that during recent rejacking of piers CT 1/12, an NCR was written because^of concern that concrete removal activities at the time of rejacking may have affected instrumen-tation readings. Mr. Zito asked what provisions will be taken to ensure that concrete removal associated with the turbine building / control tower contingency jack installation do not affect instrumentation readings during jacking of the CT 3/10 piers and the E/W5 grillages. J. McMaster stated that the underpinning Subcontractor's jacking procedure requires that the Resident Geotechnical Engineer designate which work activities can proceed when jacking is in progress. If the l-RGE determines that a particular work activity will affect either the jacking or instrumentation readings, that activitiy is discontinued until the critical stages of Jacking has been completed. (CLOSED ITEM)
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l Item 92 Reduction of Pre-soak Time Period.
! D. Zito asked if consideration has been given to reducing the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> pre-soak period associated-with minor grouting activities (e.g. base plates, anchor bolt holes, l
etc.) J. Kelleher responded that engineering is in the process of reducing the pre-soak time to 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />. A DCN containing the new pre-soak requirements will be issued shortly. (CLOSED ITEM)
Item 92 SWPS and Auxiliary Building Work Activity Packages.
-D. Zito requested the status of work activity packages submittals for mass excavation between the E/W 5 and 8 grillages and construction of the SWPS pier No. 1. J. Kelleher reported that the work associated with the mass excavation between these grillages had just been separated out from a larger work package which covered mass excavation between the E/W2 and 8 grillages. The work package was finalized yesterday and will be submitted to the Assessment Team today. The work activity package fbr construction of pier No.1 at the SWPS will be made
Not:s of Daily Me: ting Ind: pend:nt Assassi t of Underpinning Midland Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michigan June 20, 1984-available to the Assessment Team in July. It was noted that the work activity package fbr excakation of the pier and performance of the plate load test has already been reviewed by the Assessment Team. (CLOSED ITEM)
Item 92 Reorganization of the W'ork Activity Package Review Group.
D. Zito requested details regarding' reorganization of the work activity package review group. J. Fisher responded that the review group manpower has been reduced and the group is now functioning on a part time basis. The number of remaining work packages does not necessitate the need to maintain the previous
~ level of staffing. (CLOSED ITEM)
Item 92 W5 Grillage support Columns.
E. Cviki discussed the NCR resolution regarding the missed QC welding inspection of a base plate shear lug for one of the W5 grillage support columns. Although the field welding engineer report documented their inspection, this is not acceptable fbr QC documentation. As a result, Engineering reanalyzed the support column without the shear lug. The reanalysis indicates that frictional resistance at the column base is capable of resisting the design horizontal loading without the shear lug.
Based on _their reanalysis, Engineering dispositioned the NCR 'to allow loading of the W5 grillage without any rework. (INFORMATION ITEM)
Response Items Item 92 FSO Document Control "Self-Audit."
In response to the Assessment Team request fbr results of the FSO documents control "self-audit," J. Fisher provided a copy of the report summarizing the audit findings. (CLOSES ITEM 92-7)
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Not;s of Daily Meet? -
Ind: pend:nt Ass rsme... of Undarpinning
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Midltnd Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Michighn June 21, 1984 Present For: T Consumers Power Bechtel MPQAD Stone & Webster G. Murray J. Fisher J. McMaster D. Benvie E. Cviki R. Sevo W. Kilker J. Kelleher P. Majeski D. Zito Parsons Brinckerhoff None PURPOSE This meeting is held each day to discuss items regarding the Independent Soils Assessment at the Fudland Plant, Units 1 & 2.
DISCUSSION Status Items Item 92 Auxiliary Building Underpinning Activities.
Load transfer began for pier CT 10.
Rock bolt hole drilling began in the Unit 1 FIVP floor slab.
(INFORMATION ITEM)
Item 92 SWPS Underpinning Activities.
J.. Fisher reported that grouting of the lower strut plates in the vicinity of the SWPS northeast corner is scheduled for today. (INFORMATION ITEM) l Item 92 BWST Ring Beam Addition in Valve Pit.
J. Kelleher discussed modifications which will be implemented during concrete placement for the BWST ring beam addition within each of the valve pits. The use of a pea gravel mix will not be used for the ring beam addition as previously stated. Instead a grout mix will be placed in the top 6" to 12" of the beams to ensure full penetration in the placement area. As previously reported additional holes will be drilled in the valve pit roof slab to provide increased access for the concrete vibrators. (Item 90-9 remains OPEN) (INFORMATION ITEM) l New Items Item 92 FCR Task Force Update.
P. Majeski discussed the implementation status of recommendations developed by an i FCR Task Force. The recommendation which have been implemented include prioritizing l FCRs and designating suitable process times, establishing an average number of FCRs to be processed daily and formation of a planning group to identify areas in advance where an FCR will be needed. Itsnus noted that when the Task Force recommendations were
Not23 of Daily Meetirv-Ind: pend:nt Assrssmer -f Undarpinning
- Midland Plant, Units 1 & 2 Consumers Power Company
. Held at Midland Site Midland, Michiga,n June 21, 1984 formally presented in 4/84, it was reported that a 60 day report would be prepared to evaluate the effectiveness of the recommendations. Mr. Majeski requested the status of this report. J. Kelleher reported that preparation of a first draft is underway and once the report is finalized, the Assessment Team will receive a copy. (OPEN ITEM)
Item 92 Weekly Report # 91.
The text of Weekly Report # 91 was reviewed. It was determined that all open items had been previously identified. (INFORMATION ITD1)
Response Items No response items were addressed.
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Not;s of Daily Mesta ,
a Independ;nt Assessment of Und:rpinning Midland Plant, Units 1 & 2
, Consumers Power Company Held at Midland Site Midland, Michigan June 22, 1984 T
Present For:
Consumers Power Bechtel MPQAD Stone & Webster G. Murray J. Fisher J. McMaster D. Benvie J. Schaub E. Cviki R. Sevo W. Kilker J. Mooney J. Kelleher P. Majeski D. Zito Parsons Brinckerhoff None PURPOSE Ihis meeting is held each day to discuss items regarding the Independent Soils Assessment at the Midland Plant, Units 1 & 2.
DISCUSSION Status Items Item 92 Auxiliary Building Underpinning Activities.
Drifting to pier CT8 has begun.
Load transfer for the E5 grillage was initated.
Placement of concrete was completed for the Kc8 to Kc9-drift invert.
(INFOR$ATIONITEM)
Item 92 SWPS Underpinning Activities.
J. Fisher reported that the two lower strut plates in the vicinity of the SWPS northeast corner were grouted in preparation for excavation of the pier No. 1 drop pit. (INFORMATION ITEM)
New Items Item 92 FSO Quality Engineering Bi-Monthly Controlled Document Review.
J. Fisher reported that the FSO Quality-Engineering group will perform their bi-monthly review of the FSO controlled document station this weekend. (INFOR-MATION ITEM)
Response Items Item 92 BWST Ring Beam Addition in Valve Pit.
The Assessment Team has reviewed the FCR specifying use of a grout mix fbr the top 10 in, of the BWST ring beam additions inside the valve pits. Additionally, installation of additional drill holes in the valve pit roof slabs to provide increased access fbr vibrators during concrete placement fbr the ring beams has been verified . The Assessment Team concludes that implementation of these
NotQ cf Daily MeetPa; Independent Ass:ssm. of Underpinning
- Midicnd Plant, Units 1 & 2 Consumers Power Company Held at Midland Site Midland, Mich4gan .
June 22, 1984* l T
modifications will ensure fbil concrete penetration into all areas of the
-ring beam placement area within the valve pits. (CLOSES ITEM 90-9)
Item 92 MPQAD Inspection Reports of Concrete.
In response to the Assessment Team request for additional inforrration concerning the voiding of a Q.C. inspection report caused by cancellation of concrete placement for the CT 1/12 piers , MPQAD has reviewed with the Assessment Team the sequence of initiation, preparation and closure of three QC inspection reports associated with batching of concrete for these piers.
Based on a review of the circumstances and chronology of events associated with these inspection reports, the Assessment Team concludes that these reports were properly completed in accordance with MPQAD procedures. (CLOSES ITEM 91-21)
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