ML19208A943
| ML19208A943 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/13/1979 |
| From: | BECHTEL GROUP, INC. |
| To: | |
| Shared Package | |
| ML19208A942 | List: |
| References | |
| NUDOCS 7909180327 | |
| Download: ML19208A943 (38) | |
Text
i Bechtel Power Corporation Ecgineers-Constructors 15740 Shady Grove Road Gaithersburg, Maryland 20760 301-948 2700 July 13, 1979
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GPU/IMI-0023 Mr. R. W, Heward, Jr.
Hanager - Projects GPU Service Corporation 260 Cherry E111 Road Parsippany, New Jersey 07054
Subject:
Containment Reconcissining Preliminary Assessment of Potential Cost & Schedule Three Mile Island Unit 2 Containment Recovery Engineering Bechtel Job 13587.'03
Dear Mr. Heward:
Transmitted in accordance with yout request are ten copies of the Preliminary Assessment of Potential Cost & Schedule for the Recom=issioning of the Three-Mile Island Unit 2 Contain=ent Building a3 Systems. The assessment is based on a very preli=inary evaluation of the exusnt of damage to and conta=ination of the materials, components and structures inside the containment. Since no entry has been made into tha containment at this time, the evaluation is highly speculative. We believe that, given the assumptions and qualifications stated, this assessment forms a reasonable base which can be adjusted as knowledge of the plant status improves and as the reconmissioning plans evolve.
The assessmer' includes c.osts of contracts for materials, labor and technical services associated witt, the recovery of the containment (e.g., deconta=i-nation, radwaste processing and disposal, reconstruction, etc.).
It does rtot include replacement power costs, fuel costs or owner costs (e.g., GPU and Met Ed administrative, operations, or engineering payroll, etc.).
This study assunes the plant can be recoccissioned without undue delays sused by outside influence. No atte=pt has been made to quantify the costs ameisted with future plant modifications desired by GPU or required by the hRC.
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Bechtel Power Corporation Mr. R. W. Eevard, Jr. July 13, 1979 GPU/TM1-0023 We would be pleased to discuss the cost and schedule assessment with you at your convenience.
Very truly yours,
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C. W. Sandford, w/Enci J. W. Thiesing, w/Enci G
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GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PELIMIMRY ASSESSMENT OF POTENTIALCOST AIO SOEULE BECHTEL JOB 13587-003 CONTAINMENT ENGINEERDiG s
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GENERAL PLCLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT.2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SGEDULE BECHTEL JOB 13587-003 I.
GENERAL II.
ASSUMPTIONS AND QUALIFICATIONS III.
COST ESTIMATE IV.
SCHEDULE V.
CASH FLOW VI.
SUPPORT IhTORMATION VII.
POTENTIAL COST AND SCHEDULE ITEMS SV1059
GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE EECHTEL JOB 13587-003 f0TE A CAUTIOfMRY TOTE IS WARRANTED REGARDING THE USE OF THE COST AND SCHEDULE ASSESSMENT PRESENTED WITFOUT PROPER CONSIDERATION PAID TO THE ASSlf4PTIONS AND QlnLI-FICATIONS STATED HEREIN. SINCEC0tRAINMENTRE-ENTRY HAS NOT BEEN t%DE AT THE TIE OF THIS ASSESSMENT, t%NY UNCERTAINTIES EXIST. AS KtOLEDGE OF THE STATUS OF THE CONTAltNENT IMPROVES, SO CAN THE ACCURACY OF THE COST AND SCHEDLLE ASSESSMENT. FINDINGS COULD BE MUOi DIFFER-ENT FROM THOSE CONDITIONS ASSLFED AT THIS TIME, AND C0lLD RESLLT IN LOWER OR HIGHER CDSTS AND/OR A SFORTER OR LONGER SCHEWLE TMN SHOWN.
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GENERAL PUBLIC L71LITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT REC 01D11SSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 I.
GENERAL This preliminary assessment of potential cost and schedule for the recom=issioning of the Three Mile Island Unit 2 containment building and systems is based on a very preliminary evaluation of the extent of damage and contamination to the materials, components and structures in-Since no entry has been made into the containment side the containment.
In order to arrive at this time, the evaluation is highly specualtive.
at a basis for the estimate and schedule, a review has been made of the available information developed by GPUSC, B6M, the NRC and the Bechtel Con-tainment Engineering Group. This information is su=marized in Section II, Assumptions and Qualifications.
It is assumed that proper safety assessments will be performed and necessary regulate y approvals will be obtained in a timely manner needed to support the recovery plan.
The scope of this esticate includes efforts related to re-entering and cleaning up the containment, including waste disposal; removing and disposing of the fuel; refurbishing or replacing in-containment sys-No tems, structures, and components; and preparing the unit for restart.
allowances have been made for potential plant modifications which might Potential costs are be required prior to returning the unit to service.
discussed in Section VII.
The schedule shown in Section IV includes three phases and support activities as follows:
o Phase I Containment Re-entry and Decontamination o
Phase II Reactor Coolant System (RCS) Cleanup o
Phase III Reconstruction and Recommissioning Phase I involves maintaining the long-term cooling of the unit and cleaning and processing of the contaminated water in the auxiliary build-It also in-ing, the containment sump and the reactor coolant system.
cludes preparation for re-entry, the re-entry and data acquisition tasks, and decontamination of the inside of the containment.
Phase II involves preparations for and removal of the reactor vessel head, inspection of the core, removal of the fuel and vessel inter-nals and decontamination of the reactor coolant system.
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GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BEC9TEL JOB 13587-003 Phase III involves requalification testing and in-service inspec-tion of the reactor coolant and safety systems, replacement or refurbish-ment of components and materials, replacement of vessel internals, pre-operational testing, loading fuel and startup testing.
Support activities for each phase will involve the resolution of safety issues, completion of plant modifications needed to satisfy the licensing review for recommissioning of TMI-2, and disposition of radio-active materials and spent fuel.
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GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 SLTIARY OF COST AND SCHEDULE The preliminary assessment of potential cost and schedule for NOTE:
the TMI-2 reco=missioning is su=marized below. This specifi-cally relates to the assumptions and qualifications stated in Section II.
As knowledge of the containment status improves, the cost and schedule assessment is subject to change.
Cost Estimate (Dollars in Millions) 33 A.
Cleanup and Radwaste Processing 41 Re-entry and Hands-on Containment Decontamination B.
5 C.
Shielding, Rigging and Vessel Head Removal 2
D.
Core Inspection 23 E.
Fuel Removal and Dispositien 9
Vessel Internals Removal and RCS Decontamination F.
5 G.
Requalification and In-Service Inspection 26 H.
Reconstruction 15 I.
Refurbishment or Replacement of Major Equipment Not Incl.
J.
System / Component / Structure Modifications K.
Analysis, Safety Assessment Licensing and 40 Other Services 37 L.
Miscellaneous and Radwaste Disposal 236 Subtotal 79 Contingency (33%)
315 Total Containment Recovery Costs Schedule Milestones Months From Containment Entrv 0
o Containment Re-Entry 11 o
Vessel Head Removal 20 o
Fuel Removal 26 o
RCS Decontamination 32 o
ISI Complete 37 o
Fuel Load 42 o
Commercial Operation Reader is cautioned that the application of the above informa-NOTE:
tion should be subject to the caveat on Page 1.
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II.
ASSUMPTIONS AND QUALIFICATIONS 4
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GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 II.
ASSUMPTIONS AND QUALIFICATIONS The cost estimate and schedule is significantly influenced by the many factors which cannot be preciaely defined at this time. It is ex-pected that the information preser.ted herein will be modified as new data is developed. Among the t:ajor f actors affecting cost and schedule are the following:
1).
The a=ount of isotopic inventory in the containment, 2).
the ability to requalify major components for reuse, and 3).
the extent of plant modifications required to restart DII-2 In order to arrive at this conceptual estimate, the following spec-ific assumptions have been made:
Work will proceed on two, 10-hour shif ts per day, o
seven days per week using the " rolling four 10's" as discussed in Section VI.
Systems, components and structures installed to o
accommodate plant cooldown, cleanup and recon-struction are considered temporary and will be re-moved prior to return of TMI-2 to commercial oper-ation.
Extraordinary political or legal actions will not o
be a major hinderance to TMI-2 recommissioning.
The reactor pressure vessel, primary loop piping, o
reactor coolant pump casings, steam generators and pressurizer will not require replacement.
Supports, bolts, studs and embeds for major com-o ponents of the nuclear steam supply system will be adequate for reuse.
Most of the cable tray can be left in place and re-o used.
All 'f the containment wire, cable and conduit will o
be replaced.
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GENERAL PdBLIC I'TILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMF.NT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCREDU BECHTEL JOB 13587-003 All containment instrumentation will be replaced, o
Contain=ent piping will generally be adequate with o
some replacement of hanger components, snubbers, etc.
Most of the metal reflective insulation can be re-o used.
No sharing of Unit I systems or facilities will be o
permitted.
Offsite radwaste disposal is assumed to be in the o
Western United States (i.e., maximum transportation cost is assumed).
An offsite fuel processing or storage repository o
will be available, The containment can be purged in accordance with the o
release limits contained in the original plant tech-nical specifications.
Limits on tritium releases will no' o
impact the sche-dule for radwaste processing.
O Worker radiation dose limits will be as presently stated in accordance with federal regulations and plant health physics procedures.
O New construction involving radwaste processing sys-tems or for the storage of radwaste will require flood protection.
O High level vsste processing systems will be installed in seismically designed structures.
O Puture contract labor cleanup cost of the auxiliary building is not included.
O The cost estimates are escalated approximately ten percent per year through 1981, the anticipated center of gravity of the work.
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Contractor services (water, power, etc.) are to be provided by Metropolitan Edison and their costs are not included in the estimate.
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GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 Owner's costs, or those costs which are not associated with con-tracts and procurement of goods and services directly related to the TMI-2 reco==issioning activities, are not included in this report.
Ex-amples of owner's costs (and potential credits) are:
o Replacemrat fuel costs are excluded.
O All Metropolitan Edison and GPU operating expenses (e.g., engineering, administration, overhead, etc.),
except health physics and security, are excluded.
O Cost of federal, state or local permits and licenses are excluded.
O Cost of replacement powe is excluded.
O Financing costs are excluded.
O Professional services such as legal, financial, etc.
are excluded.
O Potential insurance reimbursenents are not consid-ered.
No credit has been taken for unburned energy in the spent fuel.
O Although many items procurred for the TMI-2 recom-missioning could have significant salvage value, no credit for temporary equipment salvage is assumed.
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III.
COST ESTDfATE e
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GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 III.
COST ESTIMATE The TMI-2 containment recom=issioning costs are presented as twelve separate estimates covering the three work phases. Although there is little definitive information available, qualitative or quantitative descriptions are provided for the major cost components. The scope does not represent the only basis for reco==issioning the containment, but does describe a reasonable concept for the purpose of this cost estimate, given the qualifications and assumptions in Section II.
A.
Cleanup and Radwaste Processing The cost for this current long term cocling and radiation manage-ment phase includes the emergency measures associated with plant cooldown, the installation of raduaste processing systems, and remote decontamina-tion utilizing the containment spray system.
1.
Plant Cooldown Provisions and other Emergency Operations Auxiliary building charcoal filter trains Condenser air ejector filtration Auxiliary diesel generators Spent fuel pool tankage Auxiliary decay heat removal system
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Steam generator B closed loop cooling Alternste RCS pressure control system 2.
Liquid Waste Processing Capability (10 GPM minimum)
Evaporator Calciner Filtration and resin demineralizers Solidification and drum-4g systems Processed water storage (four 250,000 gallon tanks)
During this phase it will p obably ba necessary to process up to 3,000,000 gallons of contaminate /. water, including water that is recycled from the containment sump, and the remote steam, chemical, and water sprays recycled through the containment spray systeu.
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CENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTLAL COST AND SCHEDULE BECHTEL JOB 13587-003 Because the processing of waste will be accomplished at a faster rate than the capability for off-site shipment and disposal, interim on-site staging of packaged radwaste will be necessary. The following items are included for this:
High level vaste staging facility 5,000 square feet Intermediate level waste staging facility - 25,000 square feet Outside protection area for low level radwaste interim storage -
80,000 -100,000 square feet Estimated Cost S 33 Million including 680,000 craft hours 140,000 supervision hours B.
Re-Entry and Hands-on Containment Decontamination Containment re-entry and decontamination costs include the con-struction of service-related facilities, the removal of contaminated com-ponents which cannot be reused, radiation mapping, data acquisition, and hands-on cleanup of the entire containment:
1.
Service Facilities Personnel hatch No. 2 contamination control structure Containment equipment hatch contamination control and service building Containment equipment hatch personnel access control facility Contaminated dry cleaning f icility Shielding materials Haterial handling equipment Installation of in-containment decontcmination service systems and facilities 2.
Contsinmant De:ontamination Health physics training of all workers Anti-contamination clothing and breathing apparatus Lighting and communication systems Shielding, robotics, and special tools Rags, mats, and cleaning solutions s
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GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 3.
Contaminated Equipment Removal Containment air coolers Ductwork Refueling machines Fuel storage racks Valve operators Conduit, wire, and instrumentation Letdown coolers It is assumed that decontamination activities will create approxi-mately 1,000,000 gallons of liquid waste.
Equipment removal and decon-tamination waste materials are expected to generate about 400,000 cubic feet of dry compacted waste.
Estimated Cost S 41 Million including 750,000 craft hours 150,000 supervision hours C.
Shieldinc, Rigcine and Vessel Head Removal In order to remove the reactor vessel head it may require shielding provisions above the reactor vessel head, the steam generators, and the pressurizer.
Installation of a working trolley on the polar crane and erection of a rigging platform with special tools for CRD unlatching and head detensioning are also included. Final reactor head cleaning may be accomplished utilizing a decontamination tank or a shielded area around the head storage stand at elevation 347' in the containment.
Estimated Cost S 5 Million including 40,000 craft hours 8,000 supervision hours D.
Core Inspection Core inspection needed to support fuel removal and anticipated historical documentation of post-incident core status will be done pri-marily by operators, engineers and technicians.
(Cost with Section K).
Estimated costs included with this operation are for procurement and in-stallation of TV cameras, videotape systems, borescopes, fiber optic de-vices and special instrumentation.
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Estimated Cost
$ 2 30,000 craf t hours 6,000 supervision hours 13
GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 E.
Fuel Eemoval and Disposition It is assumed that the fuel and debris will be placed in shipping cans for shipment in standard spent fuel casks and transported to an off-site fuel processing / storage repository. Other options may be pursued such as storing the fuel in the on-site storage pool, in order to defer the costs of fuel shipping and disposal. For this estimate special acti-vities associated with reactor fuel removal and disposition are:
1.
Special Tooling Loose fuel and debris removal tools Underwater vacuum Large and small piece handling tools Stuck fuel assembly tools Loose piece shipping cans Large piece shipping cans Fuel assembly and control rod shipping cans 2.
Fuel Pool Modifications Remove fuel transfer equipment Install fuel assembly and fuel debris cannirs; station Install fuel staging area Install fuel asse=bly cask loading station 3.
Shipment and Disposal of Fuel Acquire fuel asse::.bly casks Acquire loose fuel disposal casks Obtain satisfactory repository, implement a satisfactory disposition procedure and ship fuel pieces Estimated Cost S 23__I!1111on including 20,000 craft hours 8,000 supervision hours F.
Vessel Internals Removal and RCS Decontamination Following fuel removal, the steam generators will be cleaned of debris. The reactor head will then be reinstalled and the reactor cool-ant system chemically flushed. Following chemical flushing, the inter-nals will be removed and further decontaminated prior to refurbishment or disposal.
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GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAIh E T RECOMMISSIONING PEELIMIFARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 Total reactor coolant system flushing and chemical cleaning is ex-pected to produce approximately 3,000,000 gallons of liquid radwaste.
It is planned to remove, decontaminate, and either rewind (for re-use) or dispose of the reactor coolant pump motors during this phase.
Special packaging and transportation provisions for the oversize and over-weight pieces, have been considered in preparing the estimate.
Steam generator tube sheets and tubes will also be inspected and repaired at this time.
Estimated Cost S
9 Million including 50,000 craft hours 10,000 supervision hours G.
Requalification and In-Service Inspection Most activities associated with this phase will be carried out here by technical services peiple. Costs included are for procurement of the ISI tooling and inspection equipment, field inspection, the ILRT and SIT testing, and craft labor support for the inspection and testing techni-cians.
Estimated Cost 5 Million including field services and miscel-laneous support of 20,000 craft hours 8,000 supervision H.
Reconstruction Major containment reconstruction will take place following removal of the fuel and includes the following major activities:
1.
Refurbishment of reactor coolant system components and reinstallation of major components noted in the follow-ing section.
2.
Reinstallation of the containment air coolers and as-sociated ductwork.
s 3#1074 15
GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 3.
Installation of electrical items:
Wire and cable Conduit Lighting and communications Penetrations Motors Electronic instrumentation 4.
Inspection, repair, or replacement of mechanical equip-ment such as spring hangers, snubbers, isolation valves actuators, instruments, letdown heat exchangers, and other active mechanical components.
5.
Reinstallation of reflective insulation removed for in-service inspection.
6.
Surface preparation and recoating of the containment.
7.
Replacement of spent fuel storage racks.
8.
Support activities and construction materials required in the performance of the work.
Estimated Cost
$ 26 Million including 680,000 craf t hours 140,000 supervision hours I.
Refurbishment or Replacement of Major Equipment Subject to the findings of the requalification analysis and in-spection program, it is anticipated that refurbishmentment (and in some cases, possibly replacement) of certain major components may be necessary.
The long lead time for major components may warrant initiating procurement activities, even if inspection later reveals the components can be reused.
Major components considered are:
Reactor coolant pump motors and impellers Reactor internals Reactor pressure vessel head Control rods, drive mechanisms and asso-ciated cabling Pressurizer safety and relief valves In core instrumentation Fuel handling machines
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Estimated cost
$ 15 Million (d s Juj (il*
(based on purchase of new equipment) 16
GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT REC 0!OiISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SGEDULE BEGTEL JOB 13587-003 J.
System /co=oonent/ Structure Modifications No allowances have been made at this time for modifications which may be required t? recommission TMI-2.
A list of potential modifications is outlined in Section VII.
K.
Analysis, Safety Assessment, Licensing and Other Services For the purposes of this estimate, which predates detailed planning for Phase II (reactor coolant system cleanup) and Phase III (reconstruc-tion and recommissioning), an allowance has been made for various technical and other related project support activities. Among the categories for which contract support may be required are the following:
Nuclear Steam Supply System (NSSS) reanalysis Requalification analysis Safety analysis and licensing Waste management In-service inspection Quality assurance Technician support for core inspection and fuel removal Decontamination procedures Offsite laboratory analysis Support of public hearings e
Reanalysis of balance-of-plant systems Engineering to support reconstruction Preoperational and startup testing Planning, scheduling and cost estimating Management of construction services Procurement services Estimated Cost
$ 40 Million including 1,100,000 services manhours 4
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GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAhT UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AhT SCHEDULE BECHTEL JOB 13587-003 L.
Miscellaneous and Radwaste Disposal The principal cost for these support activities are:
1.
Additional health physics requirements for Unit 2 2.
Additional Unit 2 plant security 3.
Shipment and disposal cost of radioactive waste 4.
Removal of temporary facilities Estimated Cost S 37 Million including 180,000 craft hours 40,000 supervisien hours 400,000 security force hours 400,000 health physics hours N
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O IV.
SCHEDULE A
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GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 C0hTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 IV.
SCHEDULE The schedule assumes that a somewhat conservative approach is taken with respect to containment cleanup and radwaste processing and to core inspection and fuel removal. This is intended to anticipate performance of work inside the containment in a manner which is in accordance with maintaining worker radiation dose "as low as reasonably achievable" (ALARA).
Major milestones have been established and are discussed below.
1.
Containment Reentry Since it is predicted that at 8 months following the in-cident about 1.0 x 106 curies of radioactive fission products, exclusive of noble gases and airborne iodine, would be in the containment sump, the reactor coolant system, or plated out, containment reentry for the pur-poses of accomplishing detailed radiation surveys, data acquisition and containment decontamination would not be made until the following have been accomplished:
the containment has been purged the water presently in the containment sump has been removed and processed the reactor coolant system has been flushed attempts have been made to remotely decontaminate the containment (e.g., using the containment sprays).
2.
Vessel Read Removal Because of the high level of contamination expected throughout the containment, vessel head removal would not be made until the following have been accomplished:
the 305' and 347' floors have been sufficiently decontaminated to allow full time occupancy of the containment (with full-face respirators) the 282' floor has been decontaminated to levels which minimize significant recontamination of the upper floors O $ 7/O 20
GENEPAL PUBLIC UTILITIES SERVICE CORPOPATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 the polar crane has been inspected and placed in a serviceable condition or the trolley re-placed sufficient shielding placed or the refueling cavity flooded to reduce radiation levels near the reactor vessel head to acceptable levels 3.
Fuel Removal It is assumed that significant core damage has been ex-perienced and that much of the fuel will have tc, be handled with special tooling, placed in shipping con-tainers and shipped to a processing / storage repository.
It is not possible to define this task until core in-spection has been performed. However, for the purpose of the scope for the cost and schedule associated with this activity, the following is assumed:
40% intact fuel assemblies 30% damaged fuel assemblies 25% disassembled fuel assemblies 5% largely destroyed fuel assemblies 4.
Ry ctor Coolant System De_ contamination Complete
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It is assumed that some tuel or debris from the core has been distributed into other parts of the reactor coolant system, such as the bottom of the reactor vessel and the steam generator upper tube sheets. The reactor coolant system decontamination phase includes the following:
Removal of the reactor vessel lower internals cleanup of the bottom of the vessel cleanup of the e'eam generator tube sheets and tubes 2
371080
GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 removal of the reactor coolant pump motors and impellers chemical decontamination of the reactor coolant system 5.
Inservice Inspection complete The reactor coolant system components and piping will be inspected for requalification. This inspection will be complemented by extensive supporting analysis. As noted in Section II, it is assumed that the major nuclear steam supply system components can be requalified and will not have to be replaced.
6.
Fuel Load it is assumed that fuel load will not take place until preoperational testing, containment integrated leak rate testing, inservice inspection, operator training, and the NRC safety review have been completed.
7.
Cc=ercial Operation Af ter startup testing has taken place and the power demon-stration run has been made, commercial operation would be declared (per schedule information supplied by GPUSC).
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L GENERI,L PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHED11LE BECHTEL Jo? 13587-003
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V.
CASH FLOW The TMI-2 containment recom=issioning cash requirements are pre-di'cated on the recovery schedule, r.anpower levels, anticipated engineer -
ing and procurement activity, and a uniform allocation of contingency.
It is assumed that processed radwasce will be continuously shipped off-site during the cleanup and that the fuel will not be stored at the site prior to disposal. Changes in'any of these conditions or other schedule perturbations would affect the anticipated cash flow.
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Year After Containment Reentry t
Year 1 Cost Category Prior to
- 1st 2nd 3rd 4th Year Year Year CTMT Entry Qtr Qtr Qtr Qtr 2
_3 4
Total A.
Cleanup and Radwa3te Processing 21 8
4 33 B.
Reentry and Cleanup 6
o 9
8 9
41 C.
RPV Ilead Removal 1
4 5
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D.
Core Inspection 2
2 E.
Fuel Removal and Disposal 14 9
23 F.
Internals Removal and RCS Cleanup 7
2 9
G.
Requalification 5
5 11. Recons truction 3
20 3
26 1.
Major Equiment Purchase 1
1 1
1 3
8 15 J.
Syctem Modifications (not included)
K.
Analysis, Safety Assessment, Licensing 11 3
4 4
4 9
3 2
40 L.
Misec11aneous (Including Radwaste Disposal) 8_
4 4
4 4
9 3
1 37 40 22 22 18 18 60 50 6
236 (f
Contingency 13 7
7 6
6 20 18 2
79 y
IL' Total 53 29 29 24 24 80 68 8
315 y:
b:
- Subject to variance, depending on timing of containment reentry.
VI.
SUPPORT INFORMATION E
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GENERAL PUBLIC UTILITIES SERVIEE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCH BECHTEL JOB 13587-003 VI.
_ SUPPORT INFORMATION 1.
Pricing Basis Where possible, pricing is based on historical costs, cur-rent site conditions (i.e., wages....), existing price schedules, and other published data.
Certain cost allow-ances have also been used where scope definition is uncer-tain.
All current (1979) pricing has been escalated at ten percent per year for approximately two years lights of the significant pricing items are as follows:
High-
_ Composite Manual Labor Rate:
$23.00 per hour Includes escalated composite wages, overtime, shif t differential, supervision.
_Encineerint and Technical Service Rate:$36.00 per hour includes wages, per diem, travel, computer ser-vices and other engineering materials, and over-head and profit.
NSSS Component Replacement Cost:
B&W purchase order pricing (1976 basis) plus 60% escalation.
_Other Component Replaceqent Cost:
IMI-2 historical cost (1974-75 basis) plus 80%
escalation.
_Radwaste Transportation:
$ 7,000 per trip Based on round trip rates for standard weight shipments to the western United States; escalated approximately 20%.
_Radwaste Disposal:
Based on current disposal rates escalated 20%;
high level wante rates not available, allowed
$200 per cubic foot.
3/1067
GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BECHTTJ., JOB 13587-003 Liquid Waste Processing $2.00 per gallon Includes cost of chemicals, detergents and the oper-ational cost of the evaporators, demineralizers, etc.
Miscellaneous Tools and Supplies:
Included at $3.00 per hour Fuel Shipment and Disposal:
$225 per kilogram Based on DOE estimate (escalated) for a one time charge to receive and store spent fuel with no credit allowed for the unburned energy in the fuel.
2.
Schedule Basis The TMI-2 containment recom=issioning schedule and assess-ment are dependant on site labor conditions. It is as-sumed that work will be done under the President's Agree-ment, rolling 4 day work weeks with 2 ten hour shif ts. The two shift work operations are intended to make worker levels manageable and efficient; while achieving 7 day work weeks for critical path operations.
It ic expected that health physics planning and decontami-nation procedures will be designed to manage exposure limits, reduce turnover, and maintain good worker morale and productivity.
The total decontamination and reconstruction effort will require approximately 3,000,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> of craft labor and site supervision, and 1,100,000 engineer and technical ser-vice hours. A manpower loading chart, shown in this sec-tion was used as the basis for the cash flow information presented in Section V.
3.
Contingency Analysis Contingency, as used in this assessment, is defined as an amount which should be added to the direct estimate to pro-vide for uncertainties which exist within the estimate.
The addition of the contingency to the direct estimate re-suits in a current best estimate of that portion of the cost of recoccdssioning the TMI-2 containment covered in the scope s
of this assessment as described in Sections I, II, and III.
These uncertainties are a result of the preliminary nature of the scoping details, the potential for pricing changes, and the assessment of productivity as discussed below.
29 3piggg
GENERAL PUBLIC UTIL* TIES SERVICE CORPORATION THREE MILL ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT FOR POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 Contingency has been assessed af ter a review of the fol-lowing items:
a.
Productivity This is subject to variance depending upon conditions in the containment (radiological, environmental, access space, etc.), adminis-trative controls (health physics, security, etc.), support required (shielding, scaffold-ing, materials handling into and out of the containment, etc.), worker dose limits and radiation levels, timely availability of special materials and equipment and many other items which could impact work plans.
b.
Pricing This is subject to variance depending on con-tract provisions such as expediting delivery of critical ite=s, composite wage rate 1 mg a different mix than assumed (for the techni-cal support as well as for the manual craft support), and other items which could affect the pricing basis.
c.
Scope Detail This is subject to variance as the recoc: mission-ing plan evolves. As knowledge of the status of the containment improves, alternate methods than those presented in this assessment may be-come necessary or may be more viable. Particular uncertainties exist at this time regarding pro-cessing, packaging and shipping of radwaste pro-ducts; service systems and structures required for containment decontamination; methods required for decontamination; methods for handling, pack-aging and shipping of spent fuel; the amount of required reconstruction in the containment (e.g.,
wire and cable, equipment, recoatings, etc.); and, the types and amount of supporting technical and analytical assistance required for recommissioning.
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GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT FOR POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 4.
Radwaste Processing / Disposal Quantities The radwaste processing / disposal chart was used to esti-mate the volume and type of radwaste which is expected to be processed, shipped and disposed of at an off-site burial facility. Since the methods for on-site process-ing have not been co=pletely defined and tested at dhis time, the quantities are subject to change.
5.
Core Damage Assessment A review was made of available information from B&W, GPUSC, and the IUtC in order to develop the schedule duration to be allowed for core inspection and fuel removal. For the pur-poses of this estimate and schedule, the core status as discussed in Section IV, Item 3 has been assumed.
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POTENTIAL COST AND SCHEDULE ITEMS k.8.3e3 34
i GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT RECOMMISSIONING PRELIMINARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 VII.
POTENTIAL COST AND SCHEDULE ITEE3 Many factors are very uncertain at this time which may have signi-ficant impact on the ultimate cost and/or schedule. Among these are:
1.
Radiation Conditions Noble gas release technical specification revisions which may or may not require special treatment beyond filtration and release.
Possible fuel debris in the RCS which may limit access to steam generator heads and pressurizer.
Reactor coolant drain tank and letdown heat exchanger radiation levels which require additional in-place shielding.
Radiation levels at containment air coolers which may require special removal casks.
2.
Corrosive Structural Damage Reactor, steam generator and pressurizer base plates and anchor bolts which may require refurbishment.
Other embedments and structural support components which may have possible deterioriation.
Major components (e.g., reactor vessel, steam genera-tors) which may require extensive refurbishment for requalification.
3.
Manpower Han-rem exposure limitations which may exhaust available manpower.
Critical craf ts which may not be available to support reconstruction effort.
35 3/1030t
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GENERAL PUBLIC UTILITIES SERVICE CORPORATION THREE MILE ISLAND UNIT 2 CONTAINMENT REC 0milSSIONING PRELD!INARY ASSESSMENT OF POTENTIAL COST AND SCHEDULE BECHTEL JOB 13587-003 4.
Licensing Radwaste processing systems and other recovery support facilities which may require a construction permit and an operating license.
TMI-2 state and local issues which may impede the pro-ject's progress.
Resolution of Babcock & Wilcox generic issues which n.ay not be supportive of the TMI-2 recommissioning schedule.
5.
Legal and Political Transportation restrictions which may involve special restrictions for TMI-2.
Fuel repository restrictions which may involve special considerations.
Processed waste disposal and discharge requirements which may involve special restrictions for TMI-2.
Injunctions and intervenor activity which may impact the TMI-2 recom=issioning schedule.
6.
New Plant Modifications Many generic safety issues will be debated prior to the recom=issioning of TMI-2.
It is premature to attempt to quantify costs associated with modifications that may eventually be mandated by the NRC or deemed appropriate by GPU. Examples of such issues are contained in NUREG-0560, NRC Staff Report on the Generic Assessment of Feedwater Transients in Pressurized Water Reactors l'esigned by B&W, May 9, 1979, or modifications currently proiosed for 'Dil Unit 1 by GPU.
36
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