ML20147F638
| ML20147F638 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 10/11/1978 |
| From: | Porter W DUKE POWER CO. |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7810200076 | |
| Download: ML20147F638 (20) | |
Text
i Dmm POWER GOMPANY LEGAL DEPARTMENT P. O. Box m 33189 GHAlf LOTTE, N. G. nac42 w l L LI A M LARRY PORTER (704) 37J de25
. e SOC 24 t g 6f h t #A1. Couh a t L October 11, 1978 Mr. Richard McClymonds Electrical Engineer Power Supply Analysis Section Antitrust and Indemnity Group Nuclear Reactor Regulation U.
S. Nuclear Regulatory Commission Washington, D.
C.
20555 l
l Re:
McGuire Nuclear Station, Units 1 and 2
Dear Mr. McClymonds:
In your letter of September 15, 1978, you indicated that l
Regulatory Guide 9.3 identifies the information needed by the NRC staff in connection with the antitrust review of an operating license application for nuclear power plants.
Duke has reviewed the subject regulatory guide and furnished the necessary information, which was enclosed with my letter of December 10, 1976.
Your September 15, 1978 letter indicates that you need additional information.
Enclosed is the Company's response to your request for additional information.
Very truly yours, Al w
t f-am L.
Por er WLP/fhb Encl. -
78/620007(,
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i Question 1 l
l If, as a result of future smaller reserves, some load l
_must be dropped, please explain Dake's load shedding scheme, especially with regard to the allocation of the number and duration of outages to Duke's various customers.
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O Duke's Response to Question 1:
SUMMARY
OF EHERGENCY PLANS O
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INDEX Page 1-3 Emergency Plans for System Operation 4-6 Emergency Procedures for System Stability Estimated Effect of Voltage Reduction 7
Estimated Effect of Manual Interruption to 8
Class III Circuits Estimated Effect of Manual Interruption to Class II Circuits 9
10 Effect of Underfrequency Relay Operation Effect of Emergency Procedures for System 11 Stability I
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DUKE POWER COMPANY EMERCENCY PLANS FOR SYSTEM OPERATION Duke Power has developed emergency plans to provide for the maximum possible continuity of service during periods of capacity shortages caused by unscheduled nutages of large generating units, fuel shortages, electric equipment f ailures, or delays in startings of new units.
Such conditions during the heavy summer and winter load periods could make it necessary to i
reduce loads in which case the following procedures would be implemented to the extent necessary by the Operating Department.
Step 1.
A voltage reduction on feeders equipped with regulating devices will be put into effect in an attempt to reduce load.
In the past it has been estimated that this step would effect a 120 FM reduction. of
. load. Since that number has not been verified through experience because its value is dependent on the season of the year and other factors difficult V
to determine, further studies and analyses are being made and in an effort t
to obtain that verification. This plan has been coordinated with Municipals and Cooperatives and they will be requested to participate in this step.
Step 2.
Should Step #1 provide less than the required reductions in I
l load, a general request will be made through the news media asking all cus-tomers to voluntarily curtail use of electricity where possible.
Special contact will be made with larger individual industrial customers along with the general request. The effectiveness of this step is determined by the degree of cooperation obtained from the public and is therefore impossible to quantify.
It is still considered to be a worthwhile step with some degree l
of positive ef fectiveness. The larger customers to be contacted have been l
l listed and the responsibility to contact has been assigned. Municipals and I
Cooperatives will be requested to participate in this action.
V Step.3.
Shoul'd load reductions in addition to those obt'ained in Steps
- 1 and #2 be requ'tred,-a two-step plan of relief through interruption of distribution feeders will'be used. All feeders have been examined and classi-
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fled according to the effect that an interruption would have on the customers.
In Step (A), those feeders, Table No. II, with basically residential services have been determined, and interruptions will be from this group. The total potential relief from these feeders is approximately 1,481 MW, and if only a portion of this 1,481 MW is required, records will be kept so that the inter-ruptions can be rotated to different feeders should the critical period extend
'over more than a few hours.
In Step (B), additional feeders, Table No. III, i
with a higher concentration of commercial and industrial services will be interrupted should this additional relief be required. These feeders total 2,299 MW and offer additional potential for rotation to eliminate unduly long 1
outages to any one group. Feeders serving hospitals, water supply installa-tions, and other public service type of load are not included in this load relief plan. Municipals and Cooperatives will be requested to participate in this action.
t G Step 4.
In the event of a decline in system frequency, underfrequency relays are in service at various locations which will automatically shed load to assist in frequency recovery and in maintaining stability. A total of over 3 million KW of load, Table IV, is subject to this automatic control in three approximately equal steps with shedding being done at 59.3, 59.0, and 58.5 hertz.
Following such an emergency and once normal frequency is i
restored, we would revert to Steps #1, #2, and #3 as required and operate in this. mode until normal service is restored.
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, In the effort to maintain system stability following a sudden loss of generation or some other abnormality, a plan " Emergency Procedures for System Stability", Pages 4-6 would be implemented.
Should there be' insufficient time to implement this plan, our system design includes provisions for equip-ment protection and for fast restart,should a portion or the entire system V
experience a shutdown. All of our generating units are capable of rejecting
' full load without damage and'without loss of station auxiliaries. All.of our generating units are also equipped for safe rundown in the event of loss of
auxiliary power. All of our steam generating units also'have black start capability either by use of combustion turbines installed at the generating stations or from express transmission circuits which can be made quickly available from hydro generating plants. All steam generating plants have plans for holding or picking up local loads and energizing certain system feeders in emergencies.
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gj DUKE POWER COMPANY EMERGENCY PROCEDURES FOR SYSTEM STABILITY Pur pos e Duke Power has in existence procedures whereby steam-electric generating station personnel take action to prevent damage to generating units should a major outage occur; thereby, having these generators available for rapid restoration of i
service once the cause of the outage has been corrected.
Operating personnel at substations have instructions in the event of a failure of power supply to open all load switches to permit restoration of power supply to the transmission system, following which lo,ad switches are closed to restore service.
The purpose of the plan entitled " Emergency Procedures for System Stability" is to prevent the conditions developing to the extent that it would become necessary to implement those procedures required to protect generating units.
O Use of this plan should prevent a complete system interruption caused
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by the tripping of tie lines following the loss of large blocks of generation on i
our system.
As long as our tie lines remain closed and the interconnected systene remain intact, loss of large blocks of gereration will not seriously affect frequency.
The general load-frequency characteristic for the interconnected systems in the USA is approximately 4,000,000 kilowatts per tenth hertz reduction in system frequency.
Loss of generation on the Duka system in large amounts and associated tripping of tie lines could result in the frequency on the Duke system declining to 58.5 hertz I
depending upon the tie line loading prior to trip.
At this frequency it would be necessary to separate the r~emaining steam-electric generating units from the system f
in order to protect them from damage or failure.
It is important, therefore, to act as rapidly as possible following the loss of large blocks of generation to reduce
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the system load requirements in the effort to prevent tie lines from tripping.
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a' The Plan l
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The Plan provides for a prompt reduction in system load should this cmergency condition arise. All transmission lines which operate as radial 4
lines supplied from attended substations and also all radial lines supplied froa non-attended substations which are operated by remote control have l
been reviewed. Accompanying tabic No. V shows the detail and summaries of i i 5
the loads to be dropped and the sequence of dropring.
In summary, the Plan
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n is to. affect a maximum load reduction of approximately 1334 MW initially,
~ followed by additional steps of approximately 778 MW and 370 MW if required.
.l Implementation This plan will be. initiated by the Load Dispatchers in the Charlotte
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office. This office is equipped at the present time with generation recorders for all major thermal plants and the Cowans Ford, Jocassee, Keowee and Oxford Hydro plants.
Loss of generation capacity in large blocks at these stations 3
is, therefore, monitored.
In addition, this office is equipped with record-t ing instruments on all tie lines. The effect of loss of generation on tie line loading may be determined.
A color-number system has been devised for use by Dispatchers and Operators in initiating the Plan. This system will designate the order of priority for reducing load and the sequence in which the Plan is to be executed.
For example; the initial reduction of 1334 FM will be made by Operators upon receipts of orders from the Dispatcher to proceed with " Emergency Relief Plan l Red 1".
If further reduction becomes necessary, the Dispatcher will order the Operators to proceed with "Emerg'ency Relief Plan White 2".
If a third reduction is necessary, the Dispatcher will order the Operators to proceed with " Emergency Relief ' Plan Blue 3".
I As soon as the Charlotte Dispatcher determines that a' loss of genera-tion'has occurred and that the result is probably tripping of tie lines, he
- will promptly. instruct the Area Dispatching offices located at Spartanburg,
.Jewdn%@Retuogd Creat Falls.q using the " Emergency Relief Plan" Color-Number
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..l System so that there will be no doubt as to the nature of the instruction.
The Area Dispatchers and the Charlotte Dispatchers will then instruct the Operators at substations and hydro plants affected, using the " Emergency Relief Plan" Co. lor-!1 umber System.
Operators will then proceed immediately to execute the switching necessary to accomplish the load reduction.
At the same time the Load Dispatchers in Charlotte will be calling upon all generat-(l ing stations for maximum generation.
Responsibility The responsibility for initiating this load reduction program will be i
vested in the Load Dispatching Office.in Charlotte.
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Public Relations Instructions i
In the event it is necessary to implement the " Emergency Relief Plan",
Operating personnel will observe the following procedure in handling calls i
or inquiries from customers; the caller will be informed that, "We have had some major system trouble, the location and cause of which I do not know at this time.
Some of our lines have tripped and we are working to restore service as quickly as possible.
Listen to your transistor / battery radio for further information." Callers from large industries, and other large cus-l tomers will be informed:
"At this time we do not know the nature or dura-tion of the trouble.
However, as soon as we know more about the outage you will be advised." Public Relations handling of this type trouble at various locations on the system, such as Distribution Districts and Branches, will be i
l' hand 1ed by separate announcements.
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V' TABLE I DUKE POWER COMPANY Estimated Ef fect of 5% Voltage Reduction in Reducing Power Dectand KW REDUCTION KW REDUCTION TOTAL REDUCTIONS LATEST DIVISION IN 1/2 HOUR IN 1 HOUR KW IN HOURS REVISION Sou the rn 36,183 55,919 65,787 th Februarf 1978 Wes t e rn 32,315 43,382 44,267 1
February 1978 1
Central 27,085 45,142 75,236 2
February 1978
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Nor the rn 34,850 51,712 56,209 lh February 1978 Eastern 55,812 86,335 87,207 1
Feb rua t,/ 1978 TCTTAL 186,245 282,490 328,706 V
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NOTE:
Operation of line voltage regulators and voltage control capacitors is expected to limit the expected load reduction to approximately 120,000 KW.
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TABLE II DUKE POWER COMPANY Esticated Ef fect of Manual Interruption to Class III Circuits
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KW REDUCTION KW REDUCTION T(7FAL REDUCTION
. LATEST DIVISION IN 1/2 HOUR ~
IN 1 HOUR KW IN HOURS REVISION I
Southern 217,210 337,882 402,241 1
February 1978 Wes te rn 149,636 184,736 184,736 1
February 1978 i'
,1 Central 186,999 351,100 381,630 lh February 1978
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No rthe rn 153,605 168,135 207,575 1
February 1978 i'
Eastern 143,344 283,639 304,988 1
February 1978 TOTAL 850,794 1.,37_5,492 1,481,169 5
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- Class III Circuits Supply Primarily Residential Loads.
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TABLE III DUKE POWER COMPA'!Y Estimated Ef fect of Manual Interruption to Class II Circuits
- KW REDUCTION KW REDUCTION TOTAL REDUCTION LATEST DIVISION IN 1/2 HOUR IN 1 HOUR KW IN HOURS REVISION 6
d' Southern 309,016 353,161 367,876 lh February 1978 Western 146,362 247,689 281,465 1h February 1978
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Central 231,687 440,659 454,288 lh February 1978 T
Northern 171,908 266,289 337,075 1
February 1978
- g lls' Eas te rn 480,644 763,881 858,29; 1h February 1978 I
TOTAL 1,339,617 2,071,679 2,298,997 h
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- Class II Circuits Supply Primarily Commercial Loads, i
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_10 TABLE IV DUKE POWER COMPANY Effect of Underfrequency Relay Operation KW RED'UCTION KW REDUCTION KW REDUCTION KW REDUCTION LATEST DIVISION 59.3 Hz _
59.0 Hz 58.5 Hz TOTAL REVISION Northern 209,800 32,500 207,400 449,700 3/22/78 Eastern 158,500 172,400 47,600 378,500 3/22/78 i
Southern 267,800 327,700 160,300 755,800 3/22/78 Western 123,700 0
315,900 439,600 3/22/78 Central 244,100 465,200 277,700 987,000 3/22/78 TOTAL 1,003,900 997,800 1,008,900 3,010,600 j
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TABLE V V
,i DUKE POWER COMPANY Effect of Emergency Procedures for System Stability 3i g
KW REDUCTION KW REDUCTION KW REDUCTION KW REDUCTION LATEST DIVISION FIRST STEP SECOND STEP THIRD STEP TOTAL REVISION Northern 56,500 130,200 111,100 297,800 3/22/78-4 Eastern 215,100 57,300 0
272,400 3/22/78 i
V Southern 467,700 222,100 89,900 779,700 3/22/78 Western 138,300 43,300 39,600 221,200 3/22/78
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Central 456,700 325,200 128,90_0 910,800 3/22/78 I
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TOTAL 1,334,300 778,10u 369,500 2,481,900 k
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Question 2 v
a.
What was the last peak load of Davidson in kW
.before acquisition?
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b.
Did Duke supply all of Davidson's power and energy 1
requirements before acquisition?
If not, who did?
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c.
Who evaluated the Davidson system besides Duke?
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Who initiated the takeover request?
Why?
e.
Was there any organized opposition to the takeover?
If so, who and with what result?
f.
To Duke's knowledge, were there any other bulk power suppliers capable of serving Davidson's load?
g.
Was Duke ever approached to wheel power into Davidson from any other bulk power supplier?
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. Duke's Response'to Question 2:
a.
Maximum demand during 1975 - 4236 KW November, 1975 demand was - 3516 KW b.
Duke supplied all of Davidson's power and energy requirements before acquisition.
c.
The Mayor and Town Commissioners evaluated Duke's offer and the Local Government Commission of the State of North Carolina evaluated and endorsed the proposal.
d.
The request for a system evaluation was made ty letter from the Mayor of Davidson after the Board of Commissicaers passed a motion to solicit such an evaluation without obligation to either Duke or the Town of Davidson. The request for evalua 'in was made because d
the Town's-consulting engineering firm compi, study reconimending a
-expenditures for improvements in the Town's distribution system estimated to cost $s90,000.0 These improvements would increase the Town's bonded indebtedness 6v ;940,000.00.
e.
Not to our knowledge. The Town Board held public meetings for discussion end some individuals made remarks opposing the sale.
Apparently, there was no organized opposition to the takeover.
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- f..No, not to our knowledge.
g.
No, not to our knowledge; however, the Southeastern Power Administration (SEPA) may have contacted Davidson in 1963 or 1964.
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7.'.sAoug W. E. ERANNON s
Mayor *-
1* *awr*' C'erk y
C TOWN OF DAVIDSON Davidson, North Corolino 28036 o
COMMi$$10HfRS ADMINI$7tATOR Mrs. L A. h ecer L T. Metrer o, c. M..,,e, 3,.
liovember 6, 1974 A. G. McCloin H. s. Noromore
- s. W. acid, J,.
f Mr. A. f t. Neely Dtike Power Company P
O. Box 2178 charlotte, North Carolina 28201
Dear Mr. lleely,
In line with our recent conversation, we have talked to various members of the Board of Commissioners, who at their last meeting passed a motion to solicit fron Duke Power Com-pany, an evaluation of the worth of our electric power dis-3 tribution systein.
It i's our' understanding that such an A
evaluation can be made without obligation to either Duke i
Power Company or the Town of Davidson.
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Uc realize that such arrangements are not necessarily your province, uut we know that you can put our request in i
the hands of the proper persons.
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Should additional information be desired or required to l
put Utis project under way, we shall be more than happy to supply whatever is needed.
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Thank you for your consideration.
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Yours truly, f
2n #.. ) b c.
T. S. Sadler, Mayor i
TSS/rwk Town of Davidson l
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c TO Tile CIT!7. ENS OF DAVIDSON:
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f Afte r J years of detailed studies, your Mayor and Commissioners invited o
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Duke Power Company to make an offer for the Town's electric dintribution
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system.
On June 16, 1975, the Commission.:rs voted to accept Duke's offer
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t subject to referendum, A special c1cetion has been set for September 9, 1975, so that the citizens of Davidson can decide whether to support the action of the Town Board in accepti-4ffer.
It is iraportant that you be '
oefore reaching your personal i
decision; and to ass' ing a summary of facts relating l
to the sale, We urge yei to a'e urge you to vote " FOP," the issue sut I
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The Town of Davidson selling its cicetric dist ribution system to Duke Power company for_$506.200.00, to be paid in 30 equal annual payments bearing interest on unpaid balances of 9-5/8%
per annum.
AGAINST:
The Town of Davidson sciling its electric distribution system to Duke Power Company for $506,200.00, to be paid in 30 equal-annual payments bearing interest on unpaid balances of 9-5/8%
per annum.
Sincerely,
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Commissioner f % si Ast mu. c. b.
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Comhrissioner
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Commissicaer Q
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Si!MMAl(Y OF I'AC'IS COVI.it i!n: Tile PlulPOSI.l>
- .qk-SAlf. OF Till' TOWN OF DAVll S0W S 11ECTit!C b
lit h'll(llitrl l')N SYS'I DI To DilM C POWLit COMPANY r
1.
The Mayor and Commissioners have unanimously voted to accept Duke's offer subject to referendum.
2.
The Local Government Commission of the State of North Carolina has evaluated the proposal and endorsed it.
3.
The electric customers of the Town will save an estimated $55,444.00 annually in reduced electric bills; 90% of the customers will have lower hills.
4.
The Duke offer of $506,200.00 will be paid in erpm1 annnal installments includ-Ing interest on unpaid balances at 9-5/8%.
These payments will be $52,020.19 per year and total $1,560,605.73 over the period.
5.
The present Mayor ani Board of Commissioners do not contemplate the necessity of any increase in Ad Valorem taxes as a result of this sale.
Only if unusual and presently unforeseen expenses are incurred would a tax increase be required.
6.
The financial condition of the Town will be greatly improved since expenditures for system improvements recommended by the Town's Consulting Engineer, presently estimated at $390,000.00 will be avcided.
These in provements could only be financed by a bond issue which would increase the Town's bonded indebtedness to $940,000.00 and debt service on the new issue would amount to approximately $40,000.00 per year.
To meet this' debt service, electric rates would have to be increased a further 14%
or Ad Valorem taxes increased by 39%.
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7 It is the intention of the present Mayor and Board of Commissioners to apply only interest on the sales price to current Town operations and to set aside princi-pal payments so that at the conclusion of the 30-year period the principal amount of
$506,200.00 will be intact.
Obviously, this Board can not commit future Boards to i
continue this practice, hat even if principal payments are applied to current opera-tions of the Town in future years, requirements for Ad Valorem taxes w"' be reduced to that extent.
8.
The cost of electric power to be purchased from Duke for street lighting, et2.
has been substantially included in the adopted 1975-1976 budget as reliabic estimates of the cost thereof. Therefore, no additional revenues would be required at the point such purchases are actually made.
9.
Duke will establish an office in Davidson to serve Davidson and the surround-ing area and will pay additional Ad Valorem and Franchise taxes to the Town a nount-ing to approximately $5,000.00 per year.
10.
The Town's electrical employees will continue to work for the Town or be offered employment with Duke.
i 11 Answers to any onestions related to the sale will he supplied upon request at the Town lla11.
f'P (Prepared and dist ributed by the Mayor and Town Commins toners of Davidson, North V
Carolina, at no cost to the Town.)
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