ML20080D331
| ML20080D331 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Midland |
| Issue date: | 06/18/1979 |
| From: | NRC |
| To: | NRC |
| Shared Package | |
| ML082380886 | List:
|
| References | |
| FOIA-83-498 NUDOCS 8402090086 | |
| Download: ML20080D331 (8) | |
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JOB 7220 MIDLAND UNITS 1 & 2 J
FORECAST #4 l
CRITICAL PATH ANALYSIS The review and development of this forecast schedule included the analysis of engineering, procurement, vendor fabrication, and construction schedule forecasts. The conclusion of this analysis is that the project construction critical paths continue to be in the following order:
Auxiliary building piping and electrical installations e
Reactor building Unit 2 civil, piping, mechanical, and e
electrical installations Bulk electrical raceway and circuit installations
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.7 TARGET SCHEDULE BASIS The basis for our detail planning and scheduling continues to be the fuel load dates of November 1980 for Un't 2 and November 1981 for Unit 1.
The requirements for retention of and increased confidence,in meeting C.-
these target fuel load dates remain the same as our previous Forecast #2 and #3. These' requirements included:
1)
Implementation of plaas to attract and r_etain the manpowe_r levels required. These plans include:
Expansion of existing welder training, upgrading, and a.
recruiting programs in addition to implementation of training and recruiting programs for other skilled crafts when required.
b.
An increase of unscheduled overtime to meet schedule needs.
.2)
Other incentives to attract craf tsmen to meet manpower peaks have been included below the line.
This would include subsidized travel to assist in recruiting extreme peak requirements.
3)
Implementation of efforts to minimize the varied interpretation and application of the QA/QC programs.
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TARGET SCHEDULE BASIS (CONT'D)
In addition to these requirements we have added the following:
1)
Maintenance of current engineering manpower levels to expedite design completion.
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2)
Increase engineering manpower in areas required to provide additional support to procurement and construction activities.
3)
Deliveries of critical material and equipment must be realized. This may require expediting techniques previously not authorized such as premium payments, etc.
4)
The NSSS Subcontractor (B&W Construction Company) must be able to plan and achieve the installation of the present subcontract scope within the periods indicated in the Forecast #4 schedule.
O)
The preoperational testing and startup activities must be planned and achieved within or less than the 15-month duration available in the target schedule.
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The enclosed Milestone Summary Schedule, Revision 2, and the Construction Summary Schedule, Revision 2, reflect the significant milestones achieved since Forecast #3 and the current forecast of scheduled activities.
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This schedule fore ~ cast does not include any allowances for future labor disputes, scope changes, cash flow restricti'ons, licensing changes, continuing material slippages, and design changes.
The enclosed quantity installation and payroll manpower forecasts are based upon the target fuel load dates.
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I' JOB 7220 MIDLAND UNITS 1 & 2 FORECAST #4
- SCHEDULE ACHIEVEMENTS The probability of maintaining the target fuel load dates has been increased by the following achievements and actions which have been accomplished since Forecast #3:
1)
Unscheduled casual overtime for field labor has been increased to meet schedule needs and provide for advancement of critical' activities when possible.
2)
The welder training, upgrading, and recruiting programs have been expanded and are working with increasing effectiveness.
Mobil welder testing facilities have been dispatched to the denser population centers in the immediate neighboring areas and at.vertising has been increased in an effort to attract qualified personnel.
3)
Earlier starts and higher actual installation rates than anticipated in Forecast #3 have been experienced for large process piping in the reactor building Unit 2 and turbine
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building Units 1 and 2.
I 4)
The bulk concrete installation schedule'of Forecast #3 has been met and slightly exceeded.
5)
Significant civil-structural milestones have been accomplished within the Forecast #3 schedule requirements, namely reactor building exteriors, auxiliary building, turbine buildings, and yard and miscellaneous structures.
6)
The installation of rebar and embedments in a number of the first high density reactor building interior concrete place-ments have been accomplished within or ahead of the Forecast
- 3 schedule.
7)
Establishment of an offsite fabrication shop-to fabricate piping hangers, instrument racks, and miscellaneous metal assemblies is currently underway.
8)
The detailing of large pipe hangers is being supplemented in-house.
9)
Recent submittal of the FSAR.
This should firm-up licensing requirements and rinimize impacts of licensing backfits.
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SCHEDULE ACHIEVEMENTS (CONT'D)
- 10) ' The ability of engineering to support accomplishment of the above activities without impacting the currently scheduled, completion of design activities.
11)
The increased awareness of vendors to our schedule requirements via increased expediting efforts.
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JOB 7220 MIDLAND UNITS 1 & 2 FORECAST #4 7
SCHEDULE EXPOSURE The following areas of exposure coauluum to be the major schedule risks to the probability of maintaining the target fuel load dates:
Engineering Design release with sufficient lead-time to support construction o
Impact of changing interpretations by regulatory authorities e
$ e Degree of retrofit requirements
(,e Resolution of final design options Procurement Electrical and mechanical equipment deliveries e
Pipe and hanger fabrication and delivery e
e Valve deliveries Ability of vendors meeting current commitments i
e
\\ge Hydraulic snubber fabrication and delivery Construction k
- Ability of NSSS Subcontractor to meet target schedule Critical and skilled craft manpower limitations e
Labor contract negotiations and possible work stoppages e
Manual labor productivity e
System turnover requirements /startup interface Reference Quality Assurance item below e
Quality Assurance e
Changing interpretations and additions to existing quality requirements (affects engineering, procurement, and construction)
Licensing Resolution of licensing questions on fuel cycle, energy conservation, e
cost benefit, and ACRS concerns Startup
- Lack of detailed startup schedule e
e
' Lack ~of turnover. coordination Ability of Consumers Power to perform some or all of the pre-e operational testing and startup activities in shorter durations than]indicatedwithin,the15-monthperiodshown_on_th.eschedule.
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JOB 7220 MIDLAND UNITS 1 & 2 FORECAST #4 SCHEDULE CONTINGENCY To provide the capacity of absorbing schedule impacts which may result from both identified and unidentified schedule risks, we have utilized two major areas of project schedule contingency in our analysis of the probability of meeting the target, fuel load dates.
These are:
1)
The retention of 3 months of project schedule contingency between hot functional and fuel load of both units.
2)
The ability to increase our utilization of available work time through the increased use of overtime beyond the 15%
average included in our Forecast #4 plan.
Our assessment of the achievability of the target. fuel load dates continues to be contingent upon the retention of both these contingency areas in our plan.
Our' analysis indicates that as impacts are absorbed into the project schedule, the resultant startup turnover dates shown on the milestone
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startup schedule will most likely be delayed.
These delays in effect are the utilization of the 3-month project schedule contingency included between hot functional and fuel load.
This indicates that the maximum startup duration will be 15 months or less.
To meet the target fuel load dates, the preoperational testing and startup activities must be planned to retain enough logic and schedule flexibility to perform I
these activities in 15 months or less.
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O5fpun I UNITED STATES. '. - [/ ... : m. ?: M'. - h/giZ)4&f .v M ,g 8 g NUCLEAR REGULAT,ORY. COMMISSION *~ ~' o WASHINGTON, D. C. 20555 / . ;~. NOV 2 31981 and 50-330 OM, OL O(k Docket Nos. 50-329 OM, OL APPLICANT: Consumers Power Company FACILITY: Midland Plant, Units 1 & 2
SUBJECT:
SUMMARY
OF NOVEMBER 12, 1981 MEETING ON CONSTRUCTION SCHEDULES FOR FOUNDATION MODIFICATIONS TO AUXILIARY BUILDING ~ On November 12, 1981, the NRC staff met in Bethesda, MD, with Consumers Power Company (CPCo) to discuss construction schedules needed for the planned remedial actions to the Auxiliary Building at the Midland plant. The remedial action, underpinning, results from the settlement potential of the backfill soils beneath the control tower and electrical penetrations: area of that s truc ture. Similar action is planned for the adjacent Feedwater Isolation Valve Pits and was included in the meeting discussions. Meeting attendees are listed in Enclosure 1. l Vice President J. Cook of CPCo reviewed the development history for the proposed remedial action which had initially been based upon use of jacking caissons, but which,by September 1981, had been changed to a structural wall extending to the glacial till. Mr. Cook emphasized that the construction schedule for the Auxiliary Building underpinning was critical to the July 1982 fuel load date for Unit 2. For this reason, Consumers had earlier asked the Licensing Board to rearrange the hearing sessions to consider the Auxiliary Building before the Diesel Generator Building session. To prepare for implementing the under-pinning, a vertical access shaft on the east and west ends of the auxiliary building and adjacent to each feedwater isolation valve pit and the turbine building needs to be started by mid-December 1981, and a freezewall by i December 29, 1981. Staff approval of these two matters were requested by Mr. Cook's letter of October 28, 1981. The schedule for start of drifting beneath the structures is February 15, 1982. Mr. Cook further emphasized that continuing staff review throughout the underpinning process was needed, rather than a traditional two-step staff approval process. He-felt that more staff review and obser'vation in the field should be considered to expedite the review process. Review procedures such as that which had been followed during the staff's structural design audit at Anne Arbor, Michigan, in May 20 - 24, 1981, were also recommended. Mr. D. Eisenhut agreed that staff approval prior to implementing the fix was needed. In v4~' ' the construction schedule, he suggested specific approval. points by the s*M or other conditions be defined based upon the planned constructicn activities and sequences comprising the underpinning scheme. He noted thac establishment of acceptable conditions could assist in the authorization to proceed. It was agreed that a working meeting the following week would be scheduled to this end. To the extent possible, such conditions would be reflected in hearing testimony. m h
_D s.- u _. Meeting Sumary. Midland, Units 1 & 2 . v. Mr. M. Miller, Esq., noted that conditions could not be established within the existing schedule for filing testimony (due November 17, 1981) and that. Consumers would like to ask the Board to accept a delay of a few days in the filing date. Mr. W. Olmstead, Esq., replied that the staff would not object to such a request. Messrs. G. Keeley and D. Budzik of CPCo described the preliminary analysis of the Auxiliary Building to be provided for staff review on November 20, 1981. The preliminary analysis will consider selected critical structural members and selected loading combinations. An analysis of the construction sequence forthe underpinning scheme will be completed January 1,1982. The final analysis will be provided for staff review February 15, 1982. It was noted that the latter date corresponds to the start of drifting beneath the structure. The final analysis is primarily for the electrical penetration area and control tcwer portions of the s tructure. The analyses for the overall structure will be completed April 15, 1982. June 1,1982 is the earlist date that the FSAR can be updated to reflect th, results of the completed analyses. At tce conclusion of the meeting, and in preparation of the working session planned for November 17, 1981, Mr. Budzik provided the following schedule drawings to the staff's project manager: (1) Drawing 7220-PPS-020, Revision 0, dated 11/06/81, " Project Production Schedule: Auxiliary Building Underpinning Schedule", sheets 1 and 2. (2) Drawing 7220-PPS-021, Revision 0, dated 11/06/81, " Service Water Pump Structure Remedial Action - (Underpinning Wall)". f a( W Darl Hood, Project Manager Licensing Branch #4 Division of Licensing
Enclosure:
As stated cc: See next page - _ - _ _ _ _ _ - - - - - - - -. _ _ _. - _. - -.. - _ _ -}}