ML20087M975
| ML20087M975 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 03/22/1984 |
| From: | Schiffmacher W LONG ISLAND LIGHTING CO. |
| To: | |
| Shared Package | |
| ML20087M974 | List: |
| References | |
| OL, OL-4, NUDOCS 8404020244 | |
| Download: ML20087M975 (25) | |
Text
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UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION
. Before the Atomic Safety and Licensing Board j
1 In the Matter of )
)
LONG ISLAND LIGHTING COMPANY ) Docket No. 50-322 (OL) i
)
(Shoreham Nuclear Power Station, )
- Unit 1) )
AFFIDAVIT OF WILLIAM G. SCHIFFMACHER William G. Schiffmacher, being duly sworn, deposes and states as follows:
(1) My name is William G. Schiffmacher and I have
- been Manager of the Electrical Engineering Department at LILCO i
l since August 1981. I have been employed by LILCO since June 1965 in a variety of technical, management and supervisory po-sitions, the principal ones of which are as follows:
July 1972- Supervisor, Substation Operations November 1972 4 Responsible for coordinating.
efforts of 15-20 field personnel involved in operation of the electric system.
November 1972- Supervisor, Transmission and September 1975 Intersystem Planning Responsible for planning and recom-mending system transmission projects including substations; complement of 5 engineers.
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September 1975- Manager, Electric System Planning December 1977 4
Responsible for conduct of all
, studies and investigations for planning LILCO's electric facilities.
Division is organized into four specialties - generation, economics, transmission and inter-system studies. Work includes
- preparation of reports and testi-mony for economic and technical aspects of, among others, Shoreham and Jamesport nuclear units and associated transmission and inter-connection facilities. Personnel complement of 15 includes 12 engineers, 1 economist and 2 technicians, f
December 1977- Manager,_ Substation Design and May 1979 System Control and Protection
, Responsible for the physical-electrical design of all substa-tions and complete engineering i and design of all protective ,
relaying, supervisor control and l telemetering systems for LILCO; complement of 12 engineers.
May 1979- Manager, Electric System Planning April 1981 Same as above.
April 1981- Manager of Overhead and August 1981 Underground Distribution Materials (2) As Manager, Electrical Engineering Department,1my duties and responsibilities include responsibility for all l l
electrical engineering, including overhead and underground l transmission, substation engineering, distribution engineering,
and electrical engineering associated with nuclear and fossil plants and buildings.
(3) I have a Bachelor of Electrical Engineering degree from Manhattan College (1965) and a Master of Science degree in Management Engineering (1969) from Long Island University.
(4) The purpose of this affidavit is to describe all of the normal and additional sources of AC power available to support the Shoreham Nuclear Power Station without reliance on the Transamerica Delaval emergency diesel generators. This ex-planation will describe the high reliability provided by the numerous and diverse means of providing adequate AC power to Shoreham.
(5) There are numerous sources of AC power available to and designed for Shoreham. Each has substantial backup in the unlikely event of failure. They include the following, all of which are depicted in Exhibit A:1/
(a) LILCO has a 138 KV and a 69 KV high voltage network system with significant interconnection 1/ For convenience, the facilities described below are refer-enced to Exhibit A by letters noted in parentheses here and in triangles on the exhibit. Additional detail and perspective are provided in Exhibit A-1.
capacity (i) with the New York Power Pool through Con-
,solidated Edison (three ties totaling 1090 MW) and (ii) with the New England Power Grid through lines beneath Long Island Sound through Connecticut Light & Power Company (285 MW). See (A) Exhibit A; Exhibit B (LILCO
- Interconnections). This ensures the availability of sufficient power throughout the system to serve Shoreham's needs. Moreover, each of LILCO's major generating facilities is equipped with a backup blackstart2/ gas turbine to provide starting power under blackout conditions. As an example, Port Jefferson is a major generating station with two 185 MW steam generating units and a blackstart gas turbine only eleven miles from Shoreham. See (L) Exhibit A.
(b) Within the LILCO system, there are four 138 KV circuits into the Shoreham 138 KV switchyard (see (D) Exhibit A) along two separate and distinct rights-of-way. See (B, C) Exhibit A. Also, Shoreham is supplied by three separate 69 KV circuits entering a separate switchyard at Wildwood which connects to the 2/ "Blackstart" indicates the ability to be started indepen-dently of any other power source.
Shoreham 69 KV switchyard. See (E) Exhibit A. In con-
.,trast, GDC 17 requires only "two physically independent circuits (not necessarily on separate rights-of-way)"
and permits a single switchyard.
(c) Even in the event the entire grid is unavailable, the LILCO system includes 10 gas turbines at Holtsville (Holtsville is approximately 20 miles from the Shoreham site), 50 MW per turbine, two of which are presently equipped with deadline blackstart capability designed and installed to support Shoreham.
See (F) Exhibit A. Three more will be equipped with blackstart capability by April, 1984.3/
l (d) As further backup, there are three blackstart gas turbines located at Southhold (see (G) Exhibit A),
Eant Hampton (see (H) Exhibit A), and Port Jefferson (see (L) Exhibit A), each of which can supply 69 KV power to Shoreham.
3/ Two of the five have deadline blackstart and the other three will be started by the system operator. Deadline op-eration implies automatic start without operator intervention if system power is lost.
(e) At the site, LILCO is completing the instal-
.lation of a 20 MW gas turbine with deadline blackstart capability. See (I) Exhibit A. This will provide ade-quate AC power to Shoreham even in the unlikely event all transmission supplies are lost.
(f) To allow further independence from the LILCO grid and independence from the normal station service transformer and reserve station service transformer, LILCO is in the process of obtaining and installing a block of four 2.5 MW blackstart mobile diesel genera-tors to be located on site and routed into the plant's emergency 4 KV buses. See (J) Exhibit A; Exhibit C (Plant 4 KV system).
With this general description of the variety of AC power sources for Shoreham as background, I will turn next to a more detailed description of each source and a consideration of its role in providing additional assurance that adequate AC power will be provided to Shoreham under normal and emergency conditions.
LILCO'S SYSTEM GRID AND INTERCONNECTION CAPACITY (6) LILCO has a generating capacity of 3721 MW l
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l consisting of 2240 MW of baseload steam turbine units, 432 MW of mid-r,ange and peaking steam turbine units and 1049 MW of in-ternal combustion peaking units consisting of gas turbines and diesel generators.
(7) In addition to LILCO's bulk power transmission system, LILCO is interconnected with the New York Power Pool through Consolidated Edison. This interconnection is made through three ties providing an additional 1090 MW of power if needed as follows:4/
Summer Ratings (MW)
Voltage Normal LTE STE Lake Success-Jamaica 138KV 238 341 427 Valley Stream-Jamaica 138KV 271 318 441 Shore Road-Dunwoodie 345KV 581 839 1479 (8) Since all members of the New York Power Pool (NYPP) are required to maintain reserve capacity of 18% over their peak demand, and since the Pool members do not experience peak demands at the same times, a Pool-wide 22% reserve margin 4/ Exhibit B (LILCO Interconnections) depicts the various interconnections with their nominal ratings. The slight dif-ferences in power ratings between Exhibit B and the above rat-ings resulted from rounding off. Exhibit B also reflects only normal power ratings and not the long-term emergency (LTE) and short term emergency (STE) ratings included above.
l is achieved. Furthermore, the NYPP operates with enough spinning,, reserve to cover the loss of the largest generation source in the state.
(9) LILCO is also connected with the New England Power Grid beneath Long Island Sound through the Northport-Norwalk tieline which is a 138 KV line rated at 285 MW.
(10) Subsequent to the Northeast Blackout of 1965, LILCO implemented substantial measures to increase reliability of its system. These included installation of blackstart gas turbines at each of its major generating stations and imple-mentation of automatic underfrequency load shedding proce-dures.5/ In the 18 years since, there has been no loss of the entire LILCO grid. There has only been one incident in which LILCO has lost any appreciable portion of its bulk power trans-mission system. That one incident affected LILCO's system east of Holbrook. Despite the lack of any procedures then in effect mandating priority emphasis on restoring power to Shoreham, power was restored to the entire Shoreham area within one hour i
and four minutes. With the priority procedures now in effect S/ Underfrequency load shedding schemes allow restoration of a balance between load to be served and generation available by automatically disconnecting load from the system. This pre-vents cascading outages of multiple facilities on the system.
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to restore power to Shoreham and the availability of several indepen4ent deadline blackstart gas turbines, all of which are described below, it has been demonstrated by exercises that today power can be restored to Shoreham in a matter of minutes.
(11) The reliability of LILCO's bulk transmission sys-tem was further evidenced when Consolidated Edison's system ex-perienced a blackout in 1977. LILCO's entire bulk transmission system remained on line and there was no interruption in ser- l vice to the LILCO system.
THE DESIGNED SYSTEM FOR SHOREHAM A. Transmission Network (12) The Shoreham Nuclear Power Station is inter-connected to the LILCO system through 138 KV and 69 KV cir-cuits. Four 138 KV transmission circuits serve the 138 KV Shoreham switchyard. Two circuits emanate from the Holbrook 138 KV substation, (B-1) Exhibit A; one from the Wildwood-Riverhead 138 KV substation, (C-1) Exhibit A; and one from the Brookhaven 138 KV substation, (C-2) Exhibit A. See also Exhibit D (LILCO system diagram). Two separate and inde-pendent rights-of-way are provided, each containing two of the four 138 KV circuits. The 138 KV switchyard is arranged in a
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two bus configuration with circuit breakers and switches ar-ranged to permit isolation and/or repair of either bus section.
This permits continuation of 138 KV power supplied from sepa-rate rights-of-way even if an entire bus section is out of ser-vice.
(13) Additionally, three 69 KV circuits feed the Wild-wood substation which is approximately one mile south of Shoreham and from there, one 69 KV circuit enters the site.
These three circuits emanate from Riverhead (see (E-1) Exhibit A), Holtsville (see (E-2) Exhibit A), and Port Jefferson (see (E-3) Exhibit A). See also Exhibit D. The 69 KV line from Wildwood to the Shoreham 69 KV switchyard has been placed un-derground in the vicinity of the 138 KV facilities to maintain complete independence of supply between the normal station ser-vice (NSS) and reserve station service (RSS) transformers. See (K-1) Exhibit A. The circuit continues underground from the substation to the RSS transformer. Furthermore, in the unlike-ly event that either of these underground sections should fail, a bypass 69 KV circuit (bypassing the 69 KV switchyard) to the RSS transformer has been provided. See (K-2) Exhibit A. By utilizing this bypass circuit, power can be restored without having to repair the underground cable or route power through the Shoreham 69 KV switchyard. This bypass allows
reestablishment of the 69 KV RSS supply substantially more quickly)than the 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> as required in Technical Specifica-
, tion " Electrical Power Systems 3/4.8.1.1" without the necessity of removing the nuclear plant froin service.
(14) Both the 138 KV and 69 KV lines form part of the LILCO network transmission system. This system is designed to withstand winds of minimum speeds of 100-130 mph. Other natu-ral phenomena such as tornadoes, hurricanes and earthquakes have not adversely impacted LILCO's bulk transmission system.
Nevertheless, when such phenomena are expected, specific pre-cautionary procedures will be invoked as described in the affi-1
- davit of William J. Museler.
(15) Even in the unlikely event that any of the trans-mission facilities are damaged, LILCO has the ability to recon-struct such facilities rapidly. LILCO routinely constructs its own transmission facilities. Therefore, LILCO has a large force of trained personnel to construct and restore transmis-sion facilities. These trained crews are available 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> a day to respond to emergency conditions. In order to assure prompt responsiveness for the lines' serving Shoreham, LILCO is undertaking extraordinary measures to preplan such an op-eration. This includes measures such as pre-assigning poles
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and hardware and storing this equipment at optimized locations, I
as well.as conducting additional training of overhead lines l
personnel., Using these measures, LILCO can restore a mile of 69 KV transmission facilities within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. While it is not anticipated that such extensive damage would occur on any one transmission line, this capability provides a benchmark indicating the expeditious manner in which LILCO could restore facilities.
(16) Additionally, the necessity for reconstructing transmission facilities at any instant in order to serve Shoreham is minimized by the nature of the transmission system.
It is a network system of interconnected lines which provide the ability to route or reroute power over multiple paths.
B. Independent Blackstart Generators (17) The reliability of LILCO's system providing power to Shoreham is further enhanced by a number of independent gac turbines at various locations specifically designed to start during blackout conditions. Exhibit A shows the location of these gas turbines discussed below.
i (18) The LILCO system includes 10 gas turbines at Holtsvil,le, 2 of which are equipped with deadline blackstart capability and 3 of which will have blackstart capability de-signed and installed to support Shoreham. See (F) Exhibit A.
All five blackstart turbines are under the control of and can be started by the system operator.f/ Power from these gas tur-bines is capable of being supplied to Shoreham through various transmission paths ultimately leading to any of the 138 KV lines or the three 69 KV lines to Shoreham as depicted in Ex-hibit A. Under simulated conditions, tests have shown that i
power can be restored to Shoreham from Holtsville in 6 minutes.
The system operator (in close coordination by telephone and/or radio with the Shoreham control room) deliberately isolates these gas turbines so that the system appears to be in a blackout mode. A unit automatically starts and the operator then clears a transmission line express to Shoreham. Imple-i mentation of this procedure has been directed in LILCO's Emer-gency and Unusual Procedures Manual as the paramount priority for the LILCO system operator in the event of a blackout.
Tests of the Holtsville gas turbines and practice restoration s/- The system operator controls the entire LILCO grid'from a central point. There are 3 such operators on duty at all times at Hicksville.
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of power to Shoreham are conducted twice a month. See Museler Affidavit at 1 18.
(19) There are additional deadline blackstart gas tur-bines at 2 locations east of Shoreham, Southhold (15 MW) (see (G) Exhibit A) and East Hampton (20 MW) (see (H) Exhibit A),
either of which is capable of supplying adequate power to Shoreham in the event the Holtsville units are unavailable.
Power from each of these units is supplied to Shoreham by 69 KV circuits to Riverhead where routing to Shoreham can continue via 69 KV or 138 KV lines. See Exhibit D. A description of testing to assure the reliability of these units is included in the Museler affidavit. Finally, there is a blackstart gas turbine at the Port Jefferson 370 MW steam plant eleven miles to the west of Shoreham which is also capable of supplying power to Shoreham. See (L) Exhibit A.
C. Onsite 20 MW Gas Turbine e
(20) The redundant methods of restoring power to Shoreham described above complement and provide yet another backup for the most rapid method of restoring AC power to l Shoreham which is a dedicated 20 MW gas turbine being installed i
l at the site. See (I) Exhibit A. This gas turbine has deadline blackstart capablity and is scheduled to be operational in I
1 April 1984. Thus, even with the loss of all alternative AC power sources and their backups, including the Holtsville, Southhold and East Hampton gas turbines, more than adequate AC power could be provided by the 20 MW gas turbine on the site.
It has the ability to carry all plant emergency load together with some selected plant nonemergency load. LILCO's procedures call for concurrent, rather than sequential, efforts to restore power to Shoreham using any and all of the available power sources. That is, the 20 MW gas turbine will start automat-ically, while the system operator will simultaneously institute action to restore power to Shoreham through the transmission system.
i (21) The 20 MW gas turbine is connected to the 69 KV bus at Shoreham. It is also equipped with fully automatic (deadline) blackstart capability which gives it the ability to i
start automatically upon loss of voltage to the 69 KV bus and pick up load as required. The 69 KV bus supplies power to'the reserve station service transformer via an underground 69 KV cable. Power can be restored to the reserve station service transformer in approximately 2-3 minutes.
(22) With its newly installed low pressure air start system and fuel control system, the 20 MW gas turbine.at
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Shoreham is virtually identical to the gas turbine at East Hampton.which has had an operational availability of 97.9%.
LILCO's procedures for testing this 20 MW gas turbine to assure its reliability are described in the Museler Affidavit.
(23) The 20 MW gas turbine should be able to fulfill its function even after a seismic event. It is a Turbo Power and Marine (Pratt and Whitney) gas turbine. There are no sub-stantive differences between Pratt and Whitney gas turbines
! specifically designed in accordance with the seismic building 1 code and the 20 MW unit at Shoreham. The code requires that i
machines withstand a .3g horizontal acceleration. Accordingly, Turbo Power and Marine has assured LILCO that the 20 MW gas turbine would be structurally sound during a design basis seismic event at Shoreham which would exert only a .2g horizon-tal acceleration and .113g vertical acceleration. See letter
! of John T. O'Brant attached as Exhibit E.7/
7/ There is no seismic information available as to the elec-trical panels associated with the ur.it. If the unit were op-erating, there is a possibility that it would trip during a de-sign basis earthquake because of relay contact bounce. It would restart automatically in a deadline mode after conclusion of the seismic event if necessary to provide AC power. Howev- i
, er, usually the gas turbine will be in a standby mode, ready to run and provide power after such a seismic event has occurred and resulted in some disruption of the normal system power sup-ply.
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(24) In an effort to minimize the risk of damage to the fuel, tank and associated piping in a seismic event, LILCO will constantly have available a standby mobile supply of fuel for the 20 MW gas turbine (and for the 4 mobile diesels dis-cussed below) by having a loaded tanker truck on site at all times during low power operation.
MOBILE AC POWER SOURCES (25) Though not necessary or required, LILCO will pro-vide a sixth AC power source to operate upon the unlikely loss of Shoreham's normal designed sources of AC power (i.e., in ad-dition to the blackstart gas turbines at Holtsville, the blackstart gas turbines at Southhold, East Hampton and Port Jefferson and the 20 MW blackstart gas turbine at Shoreham),
LILCO is installing at Shoreham a block of four 2.5 MW General Motors EMD blackstart mobile diesel generators, model 20-645 E-4, to be directly connected into the plant's 4 KV bus network which, in turn, will provide power to the emergency 4 KV buses (see (J) Exhibit A). This provides the additional benefit of being able to supply power to the emergency 4 KV buses in the t
unlikely event of the simultaneous loss of the NSS and RSS transformers and all three of the TDI diesel generators.
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l (26) These mobile diesel generators will be able to supply p,ower to the plant's emergency systems within 30 minutes l
of starting the diesels.
CONCLUSION (27) Even under system blackout conditions, there are numerous ways to feed power to Shoreham. For example, upon loss of the LILCO grid, the multiple units at Holtsville, or i the Southhold, East Hampton or Port Jefferson gas turbines can generate adequate power. Upon the inability to start any of these system blackstart gas turbines or upon the loss of the transmission routes into the site, the onsite 20 MW gas turbine remains available and will start automatically and provide power to the RSS transformer. If that were to fail, there are still four mobile diesel generators available to serve required plant loads.g/ A maximum of two of the four mobile units 9/
would be required for safe shutdown under normal or accident conditions. Accordingly, based on the historical reliability of the LILCO grid, the multiple redundant sources of power available to Shoreham under blackout conditions and the g/ The three TDI diesels would also be available. See Museler Affidavit at 1 11.
9/ Testing may show that only one mobile unit will suffice.
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multiple transmission paths into the area, the availability of AC power,to Shoreham is reasonably assured and is considerably greater than contemplated by applicable NRC regulations.
William G. Schif cher STATE OF NEW YORK )
) To-wit:
COUNTY OF t)M )
R int.
Subscribed and sworn to before me this M day of March, 1984.
LL{0./XAf ry Public My commission expires: d/LoI G> /hrf MARIE VANACORE NOTARY PUSLIC. St:te cf New Yore No. 30-4769813 Quafs:ed in Nassau County Commi:sfon Empires t/cch 30,1 l
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EXHIBIT C Plant 4 KV System LMN3 = K it.'N::'AO:%.H's'hN I ::::::t :-1 p d & 1lenIna:r - t'"
Turtto Pow;r cnd M:rina '
UNITED Ii TECHNRLOGIES TURBO POWER syst:ms, inn.
400 Main street East Hartford, Connecticut 06108 l 203/565-4321 March 1,1984 ,
LongIslandYightingCompany 175 East Old' Country Road Hicksville, NY 11-801 Attention: Mr. Richard Zambratto -
Gentlemen:
In response to your request for information relative to the seismic resistance capability of TPM FT4 units, the following is offered.
. Prior to 1975-76, the structural design of FT4 units incorporated a variety of NEMA, ANSI, ASCE, and AWB specifications, but did not incorporate specific seismic load requirements. Beginning in about 1975, we initiated design incor-poration of the " Universal Building Code" which includes a 0.3g horizontal load requirement, but no vertical load requirement.
The " Universal Building Code" requirement is that the structures and equipment be able to withstand a 0.3g horizontal load, but does not require that the unit operate through that load. We do not know whether installed protective relays and the Rowan relays installed in the FT4 scquencer i:aits could withstand such a load without tripping.
- Even though the structural design of pre 1975-76 units, which includes the West Babylon and the Holbrook units, did not incorporate the 0.3g horizontal load requirement specifically, it is our opinion that all those units would with-stand the 0.2g horizontal and 0.113g vertical load requirement you mentioned and still be operable. The concern about operating through such an event with-out tripping relays would still apply.
There is one other minor point worth mentioning: in a Power Pac (one engine, one generator), the engine / generator coupling is rigid and provides a fixed re-straint formovement.
significant the generator rotor which would absorb any axial "g") load withoutIn a Twi generator couplings are the flexible Bendix type which could allow some genera-tor rotor axial movement due to imposition of horizontal load. This axial movement might compress one flexible coupling in the direction of movement and impart a momentary impact load on the power turbine thrust bearing. This remote possibility could result in a peening of the bearing ball / races leading to an eventual failure of the bearing. The restraining stretching action of the opposite end coupling makes this a minor concern.
The gas turbine itself is designed to withstand much higher "g" loads, due to severe flight and military shipboard blast load requirements in the 5-10g range.
1 EXHIBIT E l
l Long Island Lighting Company :
Page 2 :
March 1. 1984 i
I hope this sa.tisfies your innediate need. If we turn up any additional infonnation, we 'will pass it along.
Very t ly yours,
$ A John T. O'Briant Manager, Product Support
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