ML19220A731
| ML19220A731 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 08/22/1972 |
| From: | Philips T FEDERAL POWER COMMISSION |
| To: | Muller D US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7904240187 | |
| Download: ML19220A731 (8) | |
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Mr. Daniel R. Muller r*
Assistant Director for
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Directorate of Licensing
- y U. S. Atemic Energy Co==ission
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Dear Mr. Muller:
This is in reference to your letter of June 23, 1972, requesting e==ents on the AEC's "Draf Environmental Statement Related t) the Proposed issuance of an Operating License to the Metropolitan Edison Company, Jersey Central Power and Light Company and Pennsylvania Electric Co=pany for the Three Mile Island Nuclear Statica Units 1 and 2 (Docket Nos. 50-289 and 50 ;20)."
The Federal Pcwer Cor=ission's Bureau of Power ha: pre. cusly ec n=ented on the need for the Three Mile Island Unics and in letters dated January 28, 1971 and February 25, 1972.
In,repc.ing aese con =ien ts, the Bureau of Power staff has considerec :he.dC 0 af Environ = ental S tatement; the Applican:'s Environ =en:ai leport and amendment. the re to; related reports =ade in respcas1 Oc the
==:is s i on ' s State =ent of Policy on Reliability and Adequacy of Ele..ric. rzice (Order No. 333-2); Power Sys:e= State =e:: s submitted -
the..pplicant to this Cer=is sion; and an analysis of these docu=ents :y FPC s taff, together ' rich related information from other FPC report.
Tha staff of the Bureau of Power generally bases its evaluation e T the need for a specific bulk power facility upon the load-supply sit ;ation for the critical load period n=ediately following the availab-lity of the facility, as well as upon long-ter: considerations.
The useful lives of such facilities are generally 30 years or longer, and : hey will continue to serve the utilities' needs during their service lives.
These crents are made by the staff in accordance with the National Environrental Policy Act of 1969, and the Guidelines of the Presicent's Council on Inviron= ental Quality dated April 23, 1971. They are directed toward a review of the need for the electrical capacity of :ne facilities as concerns the adequacy and reliability of the affec:ed electric bulk power sys tems, and matters related thereto.
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- Mr. Daniel R. Muller Need for the Facilities The three utility cc=pany Applicants and the New Jersey Power and Light Ce=pany are subsidiaries of the General Public Utilities Corporation.
Together they co= prise the GPU Syste= which is operated on a fulli integrated basis. The staff analysis includes both the GPU Syste= and the Pennsylvania-New Jersey-Maryland Intercennectica (P;M), in which the Applicants are members. The s taff's evaluation of the need for the electric output of the Three Mlle Island Units 1 and 2, scheduled for co==ercial cparation in Nove=ber 1973 and May 1975 respectively, is for the su==er peak load period following the planned availability of the units. The GPU Sys te= is a winter-peaking system while ?JM is a su==er-peaking systa=.
The capacity resources and syste= leads repcreed for both GPU and PJM in the draf t enviren= ental state =ent are in general agreement with data reported to thu Cc==ission.
All of the sys ter.s involved are =e=bers of the Mid-Atlantic Area Coordinatica Group (MAAC) which provides coordinated planning for the interconnected bulk pcwer facilities for these =e=ber systems, as the PJM Interconnection provides coordinated operation of the interconnected systems.
The following tabulacion shows the electric syste= loads to be served by the Applicants and by the entire PJM Interconnection.
It also shows the relationship of the electrical output of the Three Mile Island Units 1 and 2 to the available reserve capacity at the times of the 1974 and 1975 st=cer peak load periods.
These p. 2k load periods occur during the anticipated initial service perieds of the new units, but the lives of the se units are expected to be sc ue 30 years or = ore, and they are expected to contribute to the App: cants '
total gener; ting capacity through^ut that period. Therefore, ch se units will be depended upon to supply pcuer to meet future de= ands ovel a period of =any years beyond the initial service needs discussed in this report.
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. Mr. Daniel R. Muller Forecasted 1974 Sermer Peak 2ituation GPU PJM Svste=
Intercennection 1/
Ccnditions Wita Three Mile Island Unit No. 1 (S50 Mezawatts)
Net Total Capability - Megawatts 7,135 42,494 Estimated Peak Hour Load - Megawatts 5,363 34,110 2/
Reserve Margin - Megawatts 1,292 8,384 3/
Reserve Margin - Percent of Peak Load 22.0 24.6 Conditicns "ithout Three Mile Island Unit No. 1 Net Total Capability - Megawatts 6,303 11,644 E:s timated Peak Ecur Load Megawatts 5,363 34,110 Reserve Margin - Mega~ates 442 7,334 3/
Reserve Margin - Perccat of Peak Load 7.5 22.1 Desirad Reserve Margii (20 Percent.of
?eak Load) - Megawat :s 1,173 4/
Deficiency - Megawatt; 731 1/ Cata Source - April 1,1972 Response by MAAC to ??: Order 333-2 1/ MAAC Coincident load 3/ R2 serve before scheduled maintenance of SCO E57
[/ Ine 20.6 percent reserve =argin in 1974 with Three Miie Island is currently considered adequate by PJM.
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m 4-Mr. Daniel R. Muller Forecas ted 197 5 Summer Peak Load Situation GPU PTA Svstem nterconnection 1/
Canditions With Three Mile Island Units Ncs. 1 and 2 (1.800 Megawatts)
Net Total Capability - Megawatts 8,285 48,512 Estimated Peak Hour Load - Megawatts 6,377 37,085 1/
Reserve Margin - Megawatts 1,908 11,427 3_/
Reserve Margin - Percent of Peak Load 29.9 30.8 Conditions Without Three Mile Island Unit No. 2 Net Total capability - Megawatts 7,335 47,562,/
Es timated Peak Hour Load - Megawatts 6,377 37,085 m.
Reserve Eargin - Megawatts 958 10,477 1/
Reserve Margin - Percent of Peak Load 15.0 28.6 Desired Reserve Margin (20 Percent of Peak Load) - M2gawatts 1,275 4._ /
Deficiency - Megawatts 319 1/ Data Source - April 1,1972 Response by MAAC to ??C Order 383-2.
1/ MAAC coincident load.
~3/ Before scheduled maintenance of 850 >N.
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The 30.8 percent reserve margin is somewhat higher than the 24.6 percent reserve margin considered adequate for 1974 by PJ4.
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. Mr. Daniel
- s. Muller The Applicants state that the reserve criteria used on the integrated GPU System is that adopted from the PIM Interconnectica, in which the Applicants are members. MAAC and PIM are essentially totally overlapping entities and even though there may be small differances in their areas of operation for this purpose they may be considcred identical. This minimum reserve criteria is equal to the su==er peak load plus a 20 per:ent reserve margin. These reserve margins are gross and include provisions for scheduled =aintenance require =ents of the members, forced cutages of generating equip =ent, and ordinary operating requirements which may be shared by pool participants when operating contingencies cccur.
Generally, such pool reserves do not include provisions for long term, firm pcwar transactions. The staff of the Bureau of Power notes that for systems of ne ?JM Fool considering the types and si:es of generating facilities, it would not be unusual if a 20 percent reserve =argin at the su==er peak resulted in the probability of system load exceeding the electric supply on:e in about ten years.
The :abulations for the 1974 and 1975 su==er peak periods en the GPU Sys tems shew that failure to bring the Threa Mile Island Uni: No. 1 into cc==ercial service prior to the 1974 su==er peak will result in a reserve margin of 442 megawatts or 7.5 percent of peak load, and failure to bring Unit No. 2 into co==ercial operation prior to the 1975 su==er peak will result in a reserve margin of 953 megawat:s c?'15 percent of peck load. With respect to the desired 20 percent reserve margin, a deficiency of 731 megawatts will occur en the GPU Systa= at the 1974 su==er peak period without the Three Mile Island Uni: No.
1.
Similarly, a deficiency of 319 =egawatts will occur at the 1975 su==er peak period without Three Mile Island Uni: No. 2.
The less of these units vculd also reduce reserves in the PJM Pool; the effect is to reduce the pocl's reserves by about ruo kercent j
for each unit.
The reserve margins of both the GPU System and the PIM Pool through 1975 are dependent not only upon the timely cc==ertiai operation of Three Mile Island Units 1 and 2 but also on the ti=ely co==ercial operation of six other new nuclear base-load units to:aling approximately 6,000 megawatts and 12 new fossil base-load units totaling approximately 3,400 =egawatts of capacity.
In addition, a large a= cunt of gas turbine peaking capacity is being added to the Pool's available generating resources. Capacity reserves for tae PJM Pool are forecasted at 24.6 and 30.8 percent of peck load for the 1974 and 1975 summer peak pericis, respectively, provided that the generation expansion plans of the Pool's member systems are realized.
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6-Mr. Daniel R. Muller Transmission Facilities The associated transmissi,n system to integrate the Three 'ile Island Uni: No. 1 into the exis -ing transmission ne:vork is completed and consists of approxi=ately 7 miles of 230-kilovol: lines in :hree circuits. These overhead lines are supported on lattice-type co=bination steel and aluminum towers on 150-foot wide rights-of-way.
Uni: No. 2 output will be integrated into the GPU System with two SCO-kilovol:
circuits approxi=ately 75 miles in length. The overhead lines will be supported on combinatica steel and aluminum towers on 200-foot wide rights-of-way. A third 500-kilovolt line, 11 miles in length, will be constructed, owned and operated by the Pennsylvania Pcwer and Light Co=pany which is not a GPU company.
The routes of the 230-kilovolt and 500-kilovolt linas :: averse open farmland and second growth wcodlands. The Applicants ' p actices in design and construction of transmission lines have used :he techniques now generally accepted for reducing the i= pact of overhe 2d transmission lines on the environ =en: and are fully consisten with :he Department of ?griculture's and Depart =ent of Interior's ;oint publication,
" Environ = ental Criteria for Electric Transmission Systers '.
The 230-kilo volt system integrates the plan: output into the local Metrcpolitan Edison Company's system. The 500-kilovolt syste= integrates the plant's output into the GPU Syste='s and other PJM Interconnection members' bulk pcuer network for delivery of energy to = ore distant load centers in eastern Pennsylvania and New Jersey making a significant contribution to system reliability in the total area.
A.ternatives and Costs The Applicant in determining the need for additicnal generation to meet its projected de=acds, considered purchase of firm power and a number of practical alternatives including altarnaca 1: cations, plant types, environ = ental effects and economics. The decision evolved into a choice of base-load generation, either nuclear-fueled at the Three Mile island site or a coal-fired fossil plant located at a cine in western Pennsylvania. In the economic studies which resulted in :he sel :ction of the nuclea -fueled plant, the Applicants used ca ital costs of 362 per kilowatt of capaci:y and fuel costs of 1.3 milli per kilowatt hour for the nuclear-fueled plant and capi:al costs of $31! per kilowa :
of capacity, which includes costs of sulfur-dioxide gas-ci aning r0. f% 4
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_ Mr. Daniel R. Muller equipment and additional transmission costs, and fuel costs of 3.7 mills per kilowatt hour for the coal-fired alternative plant located at the mine. The staff of the Sureau of Power finds these cos:s within the range of similar costs reported by the industry.
Conclusions The staff of the 3ureau or Power concludes that the electric power output of the Three Mile Island Units 1 and 2 is needed to meet the Applicants' future demands for pcwer, particularly during the 1974 and 1975 sw=ner peak load periods, and to provide reasonable reserve =argins for adequacy and reliability of electric service on the GPU Systa= and the PJM Interconnection. Prudent and responsible electric utili:y operations require system operating reserve cargins sufficient :o meet various operating contingencies that could result in abnormal bulk pcwer system conditions. These new units are needed to provide :he Applicants' system with the reserve margin capacity to meet its stated criteria.
Very truly yours,
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( f Chief, Bureau of Power
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