ML18088A862

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Forwards Report on System Disturbance, May 14, 1978 Prepared by Florida Power & Light Co
ML18088A862
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 05/25/1978
From: Reis H
Florida Power & Light Co, Lowenstein, Newman, Reis & Axelrad
To: Paton W
NRC/OGC
References
Download: ML18088A862 (53)


Text

LAW OVTICK5 LOW'Ei%5TEIN, NLAV'>iX5iN, REIS 8C AXZLRAD I025 CCINNKCTICVT AVKNVK,N.W.

RO8CRT IOwCHSTCIH LVASHINGTON, O. C. 20036 ABACA *, HL'WHAtl HAROLO O'. RCIS MAVRICC AXCLRAO 202 862-8400 XATHLCCH H, SHCA 8 J A, SOU xHISHTy'R, MICI ACL A, SAVSCR AI,OCRT V, CARR, JR.

ROSCRT H. CVLR

'A'ILLIAMJ. CRAM XLIN TRCOCRIC 5. ORAT LIHOA 'OOOC JOHA'TH*M R. SHCIHCR JOCL 4, WIOHTIAO ~ CAVO May 25, 1978 William D. Paton, Esq.

Counsel for NRC Regulatory Staff U. S. Nuclear Regulatory Commission Washington, DC 20555 Be". ln the Hatter of Florida Power and Light Company (St. Lucie 0 Plant, Unit 2) Docke - o. 50-389

Dear Hr. Paton:

For your further information, I am transmitting herewith a "Report on System Disturbance, Nay 14, 1978," prepared by Florida Power & Light Company and dated Nay 25, 1978.

Harold F. Reis HFR/jm Enclosure cc (w/enc.): See attached service list

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REPORT ON SYSTEM DISTURBANCE MAY 14, 1978 FLORIDA POHER 6 LlGHT COMPANY MAY 25, 1978

TABLE OF CONTENTS PAGE INTRODUCTION PRE-DISTURBANCE CONDITIONS DISTURBANCE RESTORATION CORRECTIVE ACTIONS SEQUENCE OF EVENTS 3-6 LIST OF FIGURES FIGURE AREA AFFECTED BY DISTURBANCE DETAILED DIAGRAM OF AFFECTED AREA PICTURES OF ORIGINAL FAULT AREA ADDENDUM PAGE LIGHTNING ARRESTER FAILURE POLAR I Z I NG THEORY CRITERIA FOR SETTING TERTIARY RELAYS WEST PALM BEACH COMPUTER PRINT-OUT 4-12 FAULT RECORDER RECORDS NO.

OS C I LLOGRAMS 1-19

INTRODUCTION Florida Power 6 Light Co. (FPL) experienced an electrical power system disturbance on Sunday, May 14, 1978, which resulted in the loss of po~er to an area of the FPL system. (see Fig. 1) This blacked out area included the loss of off-site power to St. Lucie Plant for approximately 8 minutes.

Fault recorder records, the West Palm Beach computer printout, and logs were used to reconstruct the sequence of events.

PRE-DISTURBANCE CONDITIONS Only conditions in affected area are listed:

1 St. Lucie Plant unit No. 1 off for refueling.

2 Pratt 6 Whitney 240kV ring bus open (240G36835 open) prior to switching. This switch had been previously reported to be a cing.

The Dispatcher believed the switch to still be inoperative.

3 Two 240/138kV autotransformers (49-1035 & 49-1168) at Midway Substation were recently installed to replace smaller capacity units.

DISTURBANCE On Sunday, May 14, 1978, at approximately 7:45AM while switching out the Pratt a Whitney-Ranch 240kV circuit for a routine clearance, a condition was created on the Pratt 6 Whitney south 240kV bus that caused lightning arresters on this bus to fail destructively. (see Addendum p.l)

Hot ionized gas from the lightning arresters caused a "C" phase to ground fault on the Midway-Ranch 240kV circuit which passes directly over the Pratt 6 Whitney bus. (see Fig. 3)

At Midway Substation improper connection of the relay current polarizing*

circuit resulted in incorrect operation of the Directional Carrier Ground Relays (CLPG) on the Malabar-Midway 240kV No. 1, Malabar-Midway 240kV No. 2 and the Midway-Plumosus 138kV circuits. Erroneous current polarizing like-wise resulted in failure to trip by the ground relays of the Midway terminal of the faulted Midway-Ranch 240kV circuit. Failure of this terminal to trip resulted in a back-up operation of the autotransformer tertiary relay at Midway Substation.

The Hartman-Midway and Okeechobee-Midway lines then tripped interrupting service to St. Lucie and the stations shown in Figure 1. Diesel generators at St. Lucie started and the station se vice automatically transferred.

St. Lucie remained on diesels until after system conditions stabilized.

Page 1

  • See addendum P. 2.

For given phase to ground fault, the north autotransformer tertiary relay is more sensitive than the south autotransformer tertiary relay. (see addendum P 3.)

This accounts for the operation of only the north autotransformer tertiary relay.

The two main contributing factors to the power loss were:

1 Improper switching at Pratt 6 Whitney Substation.

2 - Improper connection of both 240/138kV autotransformer polarizing CT circuits at Midway Substation.

RESTORATION Several attempts were made to energize the north bus at Midway Substation via the Malabar 240kV No. 2 circuit. 'owever, the lockout relay previously trip-ped by the tertiary relay had not been eset. The south bus at Midway Sub-station was energized via the Ranch 240kV circuit.

As switching continued to normalize the system, a breaker at Pratt & Whitney was closed and the original lightning arrester problem was recreated. This resulted in the deenergizing of Midway Substation.

Final reenergization of Midway Substation and St. Lucie Plant was accomplished by the closing of the Ranch 240kV circuit at 7:53:30.

This resulted in the loss of off-site power to St. Lucie Plant for approximately eight minutes and sixteen and one-half seconds.

Switching was then carried out until the entire affected area was returned to normal with the exception of Midway Substation's north autotransformer.

CORRECTIVE ACTIONS 1 The improper polarizing at Midway Substation has been corrected.

2 The north and south buses at Pratt & Whitney Substation have been tied together to avoid the bus high voltage problem encountered during switching.

3 Drawings j.n use at the time were reviewed and an error was detected. As a result of this, System Protection Memorandum No. 3.10.1-A titled "The Connection of CT's In An Autotransformer When Used As a Source For Ground Polarizing Circuit" was issued May 22, 1978. This memorandum outlines the procedures for checking transformer nameplate data against FPL drawings as well as the electrical tests which are to be made. This memorandum will be incorporated into the Power Supply Procedures Manual and will prevent a .

reoccurence of this event.

4 System Operators and Disoatchers have been advised of the hazards of an ungrounded delta.

Page 2

PROBABLE SE UENCE OF EVENTS TIME EVENT REMARKS Pre-di s turbance See wri te-up .Page 1 07:19:02 Bkr. 240W2544 5 Swi tching for clearance on Ranch opened Pratt 6 Whitney-Ranch 240kV circui t 07:12:12 Bkr. 240W2516 g Ranch opened 07:39:12 Bkr. 13W15930 @

Pratt F Whitney closed 07:43:26 Bkr. 240W36815 P Pratt 6 Whitney opened 07:43:42 Bkr. 240W36819 g Pratt 6 Whitney opened 07:43:54 So. 240kV bus potential g Potential sensor is on "B" phase, Pratt 8 Whitney alarm indicating a shift in the neutral reference point which caused over-voltage and failure of "A" 6 "C" phase lightning arresters 07'45'07 Bkr. 240W2565 g '"C" Phase-Gnd. fault on Pratt 6 Ranch tripped, reclosed Whitney -Ranch 240kV circuit and tripped caused by ionized gas from above lightning arrester failure (see oscillogram No. 1)

Bkr. 240W2555 g Ranch tripped Bkr. 240W24616 @ Tripped due to incorrect polarizing Midway tripped, reclosed connection 0o Midway (see oscillo-and tri pped gram No. 19)

Bkr. 240W24638 g Midway tripped Bkr. 240W24685 @

Midway tripped, reclosed and tripped Page 3

EVENT RBIARKS 07:45:07 (CONT'D) Bkr. 240W24651 Q Tripped due to incorrect polarizing Midway tripped connection C> Midway (see oscillo-gram No. 19)

.Time not recorded Bkr. 240W21046 @

assumed Malabar tripped 07:45:07 Bkr. 240W21065 P Halabar tripped, reclosed and tripped Bkr. 240W21047 @

Malabar tripped Bkr. 240W21085 5 Halabar tripped, reclosed and tripped 07'45'07 Bkr. 138W24785 @ Midway tripped, reclosed and tripped, Bkr. 138W24747 5 Hidway tripped Bkr. 138W29586 Cd Plumosus tripped Bkr. 138W29585 g Plumosus tripped, reclosed and tripped 07: 45: 07+ Lockout "A/C/E" g Tripped by No. autotransformer Midway tripped tertiary overcurrent relay 8k'40W24652 C4 Tripped by lockout'A/0/E" Midway tripped Bkr. 240W24615 g Midway tripped 07:45:07++ Bkr. 66W39725 5 Tripped on instability (see Hartman Road tripped oscillogram No. 7)

Bkr. 66W39710 5 Hartman Road tripped Page 4

TINE EVENT REHARKS 07:45:07++(CONT'D) Bkr. 66W6516 g Tripped on instability (see Okeechobee tripped osci logram No. 7) 1 07:45:13.5 Station service C> Loss of off-site power St. Lucie alarm Time not recorded One or more of the four assumed .

previously tripped 07:46:00 Halabar bkr's closed 07 46 46 Bkr. 240W24616 g Midway closed 07:46:47 Bkr. 240W24616 g Lockout "A/C/E" not reset Midway tripped 07:47:36 Bkr. 240W24616 5 Hidway closed 07:47:38 Bkr. 240W24616 g Midway tripped 7 07:48:19 Bkr. 240W2565 Q This energized most ot the Ranch closed affected lines (see oscillo-gram No. 2) 07:49:15 Bkr. 240W24616 g Midway closed 07:49:17 Bkr. 240W24616 g Lockout "A/C/E" not reset Midway tripped 07:52:22 Bkr. 240W36819 g Pratt 8 Whitney closed 07:52:29 Bkr. 240W36819 g Pratt F Whitney opened 07:52:37 So. 240kV bus potentia I @ "B" Phase alarm indicates a shift Pratt 6 Whitney alarm in the neutral reference point as before 07:52:40 Bkr. 240W2565 g Ranch "C" Phase-Gnd. fault on Pratt 6 tripped and reclosed Whitney-Ranch 240kV circuit caused by gas from faul ted I i ghtning arrester. (see osci I logram No. 3) 07:52:53 Bkr. 240W2565 8 Ranch "C" Phase-Gnd. faul t on Pratt 8 tripped Whitney-Ranch 240kV circuit (see oscillogram No. 4)

Page 5

'TIME EVENT REHARKS 07:53:30 Bkr. 240W2565 g (see oscillogram No. 5)

Ranch closed Station service @ Total time of'f 8 minutes St. Lucie normal 16~ seconds Normal restoration from this time on Page 6

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ADDENDUM TO DISTURBANCE REPORT

LI GHTHI NG ARRESTER FAI LURE The switching at Pratt 6 Whitney Substation left the 240kV bus energized with no ground source. The neutral was free to wander according to unbalanced stray impedances to ground.

The arresters are rated at .192kV 8-G and are expected to conduct at 1.25 times the rated voltage, or 240kV. A fully displaced neutral would subject two of a set of three arresters to 240 x ~2 (peak to RHS) or 339kV.

The resulting unbalanced voltages caused continuous conduction in four arresters, 2 on the bus and 2 on the transformer, resulting in thermal failure. Fire was reported by the operator at Pratt 6 Whitney to continue for an extended period; enough time for him to report to the Dispatcher and then cross the switchyard and operate a switch.

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Page 1

POLARIZING THEORY Directional ground relays, such as the type CLPG and JBCG, require that a reference quantity be established in order for the relay to determine the direction of the current flow at the relay location. This reference quantity is referred to as the polarizing quantity and for directional ground relaying it may be either zero sequence current or voltage. It is against this reference th'at an operating quantity is compared. The operating quantity will in all cases be proportional to and derived from the iine current at the relay location. Since line currents will reverse as a function of the fault location, it is imperative that the polarizing quantity remain fixed in direction if the relay is to operate correctly.

In transmission stations where there is a wye-grounded autotransformer with delta tertiary, the tertiary is almost invariably used as a source of polar-izing quantity (viz., current). Since the relay receives its polarizing current via a current transformer(s) in the tertiary, it is also imperative that careful attention be given to appropriate current transformer polarity and relay stud connections, else the relay may look in the opposite direction of that intended and operate (unsupervised, in the case of a type CLPG relay) for any phase-to-ground fault within its sensitivity range.

Ground Distance relays, such as the type CEYG, are potential polarized and would remain unaffected by errors in the station current polarizing circuit.

Page 2

CRITERIA FOR SETTING TERTIARY RELAYS TAP: Based on 50% of the Tertiary current for the minimum End Fault on a circuit connected to either the high-voltage or low-voltage side of the autotransformer to be protected.

DIAL: Based on 42 cycle delay for the high-voltage or low-voltage Bus Fault which yields the maximum Tertiary current.

FIND: The Tertiary currents of the Midway substation autotransformers 49-1035 (North) and 49-1168(South) to be used in setting their Tertiary Relays per the bases. 'bove CIRCUIT: NIOWAY SUBSTATION (2BORV and 138kV Buses)

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The times listed in the alarm/operations log cannot be construed to be the exact time of occurrence of an event or alarm. Sequencing and scan in the computer, plus the varying times of reporting by the different types remote supervisory equipments, preclude time and sequence determination for events occurring at the same time or close thereto.

Page 4

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<0"" n6 r7 I.",0 I h,'! i().'i!!  ? ~0<V ~ JS P()TERAI'r [AL l () L rS L I " iiOif ';), [..

08-0 -28 08-06: 31 Dig I ID'7'[AY 2~4<'f?

240([24585 4'~ )QIIJ~ h I LECI HALABAR I CL()SEO h'06 '-A6: 32 -I 08-06:32 I A Y II

[;i hY 24n.;a~~'.I~ .I(h[ h~'",ii 1< I$ i

~

'4' L~

D'r'I J(>RT'-! 24OKV BUS POTEHTIAL iXORI')IAL v'J8:P6 3Q ..t!D '!

~ ~

?

I ~ I!/ P!j P ) F !hi hl Ih/ I '

08-07-26 PRATT K I'IH IT".IEY 240"l36811 I!A[l)I ANTOi'IH SELECT 08:07-PR 33 PRATr TT 8, AH I TilEY STATI0 I SERVI CE

'-'I 'Thk 'I )i~tiJh MORI'i gL

'<<)~:()7-08:07:37 "i

PRA1T P.

i" Ll~

III ITIIFY 240,136311 Ii)DI I;ITO,III OP~&7
"I ~ ~~m~

8

..."!HI:r,;<6Y .? 4Q.'.9/3'0 1~l3.LALMTQ:I!!I ~ 8 EL ECT CL!)SHl

~.f)P ~()7 ~ 4 1

> -'T> .'; ".i! ['I"!i=Y '"-': >'".<V Ri!~ i"')'P.=.NT[ ~L h)D~ i ~

';54

t)Q:P)7:57  ;~i'2h I I " .IH [T'IE'! 8Th ~ ')'! ~.=')VI C": AL KIT .

8:no:?4 ~CZ

'9-12-15 ALA~ './'.)PERATIOVS LO:) 05/I4/78 08-09-28 PJ?h IT 8 /l"I IT IFY 240'i36~~ I I I!JQI a'.ITO/J.'J~ CLOSED

>Isa'; f 08:09- 30 i3!?hTf ', sl+ IT'!FY I'JOLT I 240'<V BUS P-)TFi<T I 8 L I JO?? '.AL 08 30 PPATf '~ Ii: I IT"IEY STa.'f I().'I SERV I CE )<?.I AL PJ?Al': .:. ~

':I f!<" Asll >T'-: >r'.></: i:'s)TJ=.'i~ i a', aI i 'r~A

~

!? "i p

<< 's: ':,'?

I I i' I,'P~

i" !'s '"

Y 13 ~l ~O" I')'"3'.!i I '.i

0) P5 'g A P f t;t P I,J 66/i39725 I'I EST/'.! Ii)@AY (I'i)A')

SFL CT, 08-25 -58 HARTfAil ROA'3 65 139725 i!EST/".I I D'I AY: CL()SEQ i)8-26-0! 'HAIRT".!AD P() ED . 66':!39719. lh IOY'I> Y/CF~P SELECT 08-26:05 'HA RT /'Ai'I ROAD 66'!'I 3971 0 .'I I DI'tAY/CFP CLOSED 08.-38:ll qANCH  :-240'l25)6 ~PP TT-HHITl)EY' CL:)S).D 08=38:11 RAi~!C S PRaTT-/JHIT;IFY 2 LI!JE POT Nl)Zl!AL OS:38-'27 08-41 -00. RAI'JCLI 240s'>2555 BROilhR') 2/.'.I ID'I'!AY SELECT 08- 41: 04

<<:)",".:49-56 RAI'!CIR s&t (

240s)> 555 RRO'14 RD PRaTI l" IT!I:-Y I'.I CL!)S~

Ag ~

240ii2516 TAn CI...ARED

.cI)R: 50: 05 o)a IC'-l

>4IT)  !?'"'",4 OA '-"'-'I'P asi I 08-55:53 L O RELAY "A" 2" 0'<V BUSSES

~

~

08-57:53

~

4 PP.ATT, PRATI' a

8,

"< L~13ii!5930 J~ITVEY

)'JHITiIEY BUS TI: B!<R N()R? fAL 0 PE!)J

'Q(~S:

'~

08-58:08

<<0~ -58: 16 08-58-'45 PRAlr

)8:58:

0 ~S~)S PRArr ~ 'JH IT~IEY 240'6315 PRn PRATT

'A 8,

I'!*"~

vs:v >,l iiH IT~IEY 240"'36815

JH IT.'Il-.Y 240.i 36 ~ I 5 s6~ LE~4"/sl I NDT('i.'J/I? A VCH Zt I VDT'I'll"/P. VCHA

)

I s!I) f I I -/R aI:.! C+

SFLECT SELECT F i I I '-a

..-..s)  !) CI OS=

08-59:35 PRATT 8 JH ITs"IEY 240s'!3681 5 I'IDTI'I-"'/RALEIGH CLOSED I 09:00:22 PRATT 8 .2)HITVEY 240li365) I IS)Dias!TO;-s~H S ECT 09: 00: 26 8, .JH I TNF Y 240 136911 Ii'JOI A'JTO/V CL!)SED *

&PATT I'JH IT"~u.Y  ! JOR~740i<V g US~PO I:~I/fL HOR!!AI PRATI'9:('0:26 09:GO-'2o I RATT 8 "JH IT!'JEY STaI TIOlv SI:-RV I C" VOR J')AL

<<:.)o:0)0-'4 PI? ATf 'I'"IT'!;.Y Ca! I~R'. I [OH PRESS LI'.< I'OP"h!

'~0o -OP.: 34 PRATf P iiH I'f'JFY CAL I BR '~.TIO.'I PRFSS LI I VOR.'.! hi 09:00-58 PRATT AHITVFY~BtT~3Y LO)'I V!)LTP0= I')O~R)I 09-01-35 PRATf'R l!HIT!!EY I 3)'ll 5930 BUS T IF. BKR SELEcr 09-01-38 PRATT R JHITHEY 13)'ll 5930 BUS TIE B<R CLOSED 09:02:06 PRATT 8 s'JH IT~JFY r240i'i3681 9 RAIJCH TAG S I ~

09:04- 41 'fID'iJAY L()CK!)UT RFL Y a/C/< 4 )Ri.!a I 09:10- 44 ?8 I DY"iAY 240J24538 'ILIER 2/ST LUCI E 2 SELECT 09-11 -09 D"i ~4'I >~433~>LBB > iGXJJL 09 AD !1 -I 6 '.I I D".I AY 240i'!24538 ~

'fLBR 2/ST LUCIE 2 SELECT 09:11: 19 'C I 0'vi Y 740~)'J24 8 ?f R 2/S L C F 2 OP~~!I 09-1 I:23 ,'I I O'I'I A Y 240,'!24o16 i.fhLABAR 2 SELECT l 09:11 -28 09-11 -'30 09:11:

'~0o-

I I I I -

34

',(I DVi Y

'I ID'i!hY

'I I O'I'I Y

-37 'IID Ja,Y 37 'I IA".i ~~

.~0:i24o!6

IOP.T'-I 240'<'/ BU~

s!!)?T'I 240~V BUS i.fh AB P. 2 VORTH 240KV BUS POTE!'JTIAL 240i'i24638 'rfLBR 2/ST LUC I E 2

~

SELECT CLOSED IVOR!IAL VOL1S LI-I 'IO!?"".Ai

'/:)LTS ! I'-8 'JOP"

'T, I D"A Y. 240'4638 ".LBR 2/ST LUCIE 2. CLOSFD ~'9-11-42 09:12:38 'I I DLilhY >40 s24652 ST LU I 3 SF CT 09-12-43 'fIDi)Ia.Y 240>'J24652 ST LUC IE 3 ~ CLOSFD 09-12-53 '8 IDLY 240i74515 ST LUC IF. I SFL ECT 09-12:57 'I I DI'JA Y 5 CLOSED 09- I 3- 02 '<

I 0'iiAY 240ii>4685 'IALABAR I SELECT 09-13-07 'I I D'2'I A Y 240!'i24685 .'fALABAR I ~ CL )SED 09 13-19 'f ID<'Ih Y

~ I 38A'!24785 PLU'.!OSUS SEL"ECT

FAULT RFCORDER RECORDS NO. l-19

FT. HYE?S 24OkV LAJDERCALE 240kV VB-H

'W'PiVtV~NVViVIv'v~MfAVA!vVJ'J'A'AAf PPJU'/O'A"@VV'P/":>",:j: ": .':: ' "

ip vv!'rA'UI'vr!4'vJUI'JNIV/UVJIPi'UUMVNUWUU v'4'A'vAJVINVAIVv PSM 240kV VC-N 3 I 8?GUARD 24OLV MvOEnOA' t(0.

240XV 1 IA 5~l I'ilCslrhY 240kV lc FT. IIYERS 240kV 3lo 7 s

FT. I'BUYERS 240kV I CAR 8 r BAIRD 240kV tl0. l 3 Io 9 c'T HYERS 240kV I'ATTS 10 FT. tlYEnS 240kV VARS LArJDERQALE 240kV 3lo 12 LAUDERDALE 240kV ICAR 13 C gypsy p,u>SENT O.psg O FoCLPAI.Yt AY'nsDWAY I2C%ntBAGS'@CO tllWAY 240kV 14 "wtisA~ YI' 3lo M V t:I W'AY 240kV I CAR 15 EVENT HARXER 16 BRItJARD 138kV IA 17 BRD"ARQ 240kV HO. 2 3to 18 L.

BRuVARQ 240kV tl0. 2 VA-N 19 Ai:

rr ~ '

t::::.

!~ r ~ \ ~ r 1 r BROsJsRD 240kV tlO, 2 I CAR 20 HIDVAY 240kV CARSTOP21 RIVIERA 138LV NO. 2 tri 22 RIVIERA 138LV NO. 2 FREQ 23 r ~ ~ rr l r ~ ~ ~

r'T.

tsYERS 138kV VB-H 24 FT. PYERS 138kV FT. HYERS 138kv RIVIERA 138kV NO, 3 31 0 ICAR ICAR 25 26 I 27 t

s I

HYPDLUXO 138kV Vc-H " pN'Vi!"!'9 ."i 'J 'i II'7 4" V i '.J."I'4

~ I I'~ g'iA'( ( y/',.~/(;;.IIL",,;7'~";:-',!;, J hYPOLUXO 138kV 3lo )

HYPoislxo 138kv ICAA 30 L STATION s RANCH BROCARD 138kV VA-H 31 !jtls!'. ,.'s TINEs 07:48s20 OSC ILLOBRAPH NO ~ '. 02 >PA"vVPPAV/'AVJVAV6: ".V ':

T XYERS 24'kV VA-i;

'l'JV PP?vV.nfuV J'PAVPP"PiVWvV! I.'V'iLI"A~vPiJViifIJ'lAVNJVf: :

V% A JV l/VAA 'J V~V LAOOERLAI.E 240kv VB-X 9'fV J i 6IJ~I 11" V'9 'V' '

y0 6 4> ~J 9~1.7V IJ V LJ v kP V 22.i L.ICI U PJ! 1J1J Lt 1t C PE,'M 240kV Vc-N C PHPSa-6I4D +AuP=F CPW mloWAY-graC6 2%OY-V RE%.$ TPCBL)Sing'QCP BRD'"R'42kv Agc = nCA' hO. 1 24 0 kV IA IB 4 !

5 WV I

xicvAY 240kv lc I 2 u FT. I;YEAS 240kV 3lo IL11C11 g >' .

g ACLP C II ILO CC.o5IC 5 FT. NYERS 240kv I CAR op Pic CICERO 240kV NO. 1 3lo PrL.r 2 r FT. XYERS 240kv VATTS 10 FT. XYKRS 240kV VARS LADOERLO*LE 240kV 3lo 12 LAJ ERDALE 240kv ICAR 13 ae. nV' l PCuYaT1.neSroPC CCCWIV 111 A.LC 5'll HIDEY 240kv 3lo 14 C l~l xl0'OPAY 240kv I CAR 15 V EVEhT HARRER 16 t, DRy:ARD '3SRV IA 17 r, BROCARD 240kv NO. 2 3lo 18 240kv NO, 2 19 I!?l 4?

BROCARD VA N SRDNARO 240kV NO 2 IcAR 20 I'olaA"Y 240kV CARSTOP21 RIVIERA 13Skv I"0. 2 22 I

~A,A r h~W ~ ~

IA RlvliRA 138'LV NO. 2 FREQ I

FT. HYERS 13&kv VB-N ..",",. Elf O'V"."A '."J IJ" AVV'II~."iV FT. NYERS 138kV 3lo 2!

FT XYERS 138kV ICAR RIVIKRA 13SkV hO. 3 I CAR 27.'

NYPC 'xo 13ekv Vc-N 28 4'X%'PP: '-.":",': "lI"g'"J'y,'~; g"1 "1,~,,'P,": " ""qi,. g$ >'.

x(pc.oxo -3ekv H'TP Lv'xo 13ekv 3lo I CAR 22 30

'~ * ' -" ' STATION: RANCH TIHIEl 07;52140 B?CVARO 138kV VA-N 2 I I,'" 'PI I'~ .. 'I AiLJPO~Q) OCCILLOCOCPII OO OP ~@i'V'A LI':"'".;

Ff. HYERS 24':LV LAuOrk:ALE 240kV VA-h Va-H 1

2

/ '

h P

h I: 5" l-:'ll tt'

~

lii" 'I i'I"/'1/- At f'/ f' f t" I' 5 5 ( h

'/'

t '>

'":: F f') f' /

h . h q ~ ' ' ~

2

!1 P

~ 2

PCM 240kV VC-H 3 C'>IIP>c Q C>>tto, f-'f>>tL f Othe'LC!'Wt> ( ll P>t>tCIt> V>ION@

BPOIC;1. 2! OI,V I;0. 3 IA ar.C.~en I:L.IS ACIEt W<<rh, ~

tJ"Orh A f Zl,OkV I tt 51 I

NI fVA-. 240kV IC 6 rh> C ~

fi. I'YEAS 240kV 3lo L

e,f,~Ca eY.A.

FT. >IlYERS 240kV I CAR 8 of>cw F.

SR01!AAO 240hV liO. 1 3lo 91 fT. NYERS 240kU VATTS 10>

fT tlYERS 240kV VARS LAVDEROALE 240kV 3lo LAVDEROAI.E 240kV ICAR Hl Ot!AY 240kV 3l o 14 Nl(YAAY 240kV I CAlL 15 f.VEN, HARi;ER 16 BRIN!ARO 13SLV IA 17 l BROVARO 240kv tm. 2 3lo

> ~

SROVA>IO 240kV tt0, 2 VA H 19 '

Sf>OVARO 240kV t>0, 2 I CAR 20!

NIOVAY 240kV CARSTOP21 RIVIERA 138kV I;0. 2 'A 22 I RIVIERA 138kV NO. 2 FREQ 23l <<

~ 2 h <<h f h h $ \ h r h ~ 2 ~

~

~ 2 FT. NYERS 138kV VS-H FT. NYERS 138kV 3lo 2;5 FT. N>YEAS 138kV RIVIEPJL 138'LV NO. 3 NYPOLVXO 138kV I CAR I CAR 22'~

26 -r C-N I

s hYPOL>lXO 138kV 3lo 2> <<

hYPOLOXO 3 38kV ICAR 30 STATION: RANCH T I HE l 07 l 52: 52 gI 1,/';

SROVARO 138kV OSCILLOGRAPH NO. l 04 ~ ~I 'L IQ i

~ .

FT. NYERS 24Jkv VA-H J'JNV J'vVlJsfWNMN'J'JVVV'V'JVNNVNfWVVtfsfvsfPiVvVv'f:fI:'" ' '"

LAitDEkoALE 240kV Pc'tt 240l.V Va-k Vc-H

'I/cfs'RI'vANiWNcVIWVvNfvVv'VVAvRcRIVVvVJ  !'vvvVJNfVOIv ': i; "

t4o tC s ~co>>'4's>>C s.

Qswsl CA,o4c t SRO.'u: 242LV t.p. 1 IA ts o LAJCER ALE 240kV Nl CvAY 240kV Ic 6 FT. I:YiitS 240kV 3lo 2'-

FT. NYERS 240kV IcaR SRCaND 240kV tip. 1 3ln a>>oc>> J>>>>jo ~. ~ '

. s,oc FT. ttYERS 240kV 10

\

s o

FT NYERS 240kV VARS l

LAUDERDALE 240LV 3lo 12 '

LAUDERDALE 240kV 13 CAR

~muTVI p,ufo PA.tssoJolTsog.~gfc. AT tvotcsvppsY FeaaEaC

" tsJI4u NIDMAY 240kV 3lo 14 ~ >> ~ t+EO'RO NID"AY 240kv ICAR 15 EVEhT NARRER 16 JARS 138kV IA 12 8RCUARO 240kV NO. 2 3lo SROVARD 240kV tip 2 VA-H 19

~ SRPVNRD 240kV top. 2 I CAR 20 NID'JAY 240kV CARS TOP21 is ~

i RIVIERA 138kV I;0. 2 IA 22 v ~ M ~ ~ ~ ~

RIVIERA 138kV HO. 2 FREQ 23 FT. 'NYEPS 138'kV FT. NYERS 1382V 3lo 25 t ttt"':i:::7,': '" .RffvVJAVV,IVVVVNfNf<VVVARJNfAVV PA:.:,"s.', ';:...

FT. NYERS 138kV RIVIERA 138kV tip. 3 leak I CAR so,~

2&

cf" o

HYPCLUXO 138kV VC-H *oIVV'v:: :t:,,,'s.Vv'V i

fvi!'! Mi~RRfVVWVJVNlviiNsJVViA's'vNIc.'cP;:V:

NYPps UXO 13&kV 3lo 29' siYP>>LUXO 's38kV ICAR iJ STAT ION t RANCH SRG"AR>> 138kV "A-:t ii Ns ',RRj osccccooacII'io.: os ~AVAVNR VAM!VVAVU'<,I;I'U"IVi:

FT. 43EES 24 4'A-h LAUQ R;A .: 24"k'U Va-h P'V 2<QLY

~ ~ ~ % 4 W~W + p N ~

BRO"ARQ ic.kf:.Q. 1 IA 4 EAO c A 24 kU IB II)k'AY 24SRV Ic FT. rYERS 240kV 3)o FT. IlY=RS 240k'. I CAR

~

BRQ"'RQ 24QkV ho 1 3)p 9 I

FT BYiRS 240k( MATTS 10 FT. BEERS 24QRV BARS 11 .

r-.

UQQERQAki 24ckV 3)o NIQERQALE 24CXV I CAR

  • II)O~Y 24.kV 3)o 14 g

II)ir~'AY 242kV )CAR 15 f ~ ~

EVENT I'AR-.ER 16!r BRG'JARS 'Bkf IA 17 BRC"ARQ 24QkV XO 2 3)o QR 'ARQ 2(okV 0. 2 VA-iX BRO~ARQ 24QLV '0. 2 )CAR 20 II) 0'~Y 24QRV CARSTOP21 X)VIER'BkV:.0, 2 22 RI'V)ERA 38kV Xo. 2 FREQ 23 I A FT' VERS ckg 24

~

VB-II FT. AYERS 3cki 3'o 25 r F.

h'YP l.YEAS Rl V) iRA hYPQ!QXO hf PQ'vXO OXO 32kU RV:.Q. 3 3ckV

'!Bk'r 3-kV

)CAR I CAR Vc-II 3)o

)CAR 26 27 28 29 3Q

! A n 1

' <<VVAVNVVAI'~'VV~<>>'" +'~'"

osciiknatA!SPtf <<t.: 06 'pfgj"II)Q~(gfgpppp/'ggI,f)IQ Ipfy,'"g',f'I:~,'~,'",/'," ',.

I Hid<<ay 2404V Ko. 1 "A-K Niday 240kV Ko. 1 Ve-K 2 Hid<<ay 240kV Ko. 1 VC-K Hid<<ay 2402V Ko. 1 'A 4 Hid<<ay 240kV Ko. 1 'e 5 PJ I

llidway 240kV Ko. 1 IC 6 a

Nidway 240kV Ko. 2 VA N i Nid cay 2404V Ko. 2 3lo 8 Hid<<ay 240kV Ko. 2 ve-K Hid<<ay 240kV Ko. 3 VC-H Nidway 240kV Ko. 3 3lo 11 t I I

Hidway 240kV Ko. 3 yt Hid<<ay 240kV Ko. 3 YB-K 13 Nldway 240kV Ko. 1 3 Io 14 Nidway 240kV Ko. 2 IA 15 Hid<<ay 240kV Ko. 2 Ie 16 Hid<<ay 240kV Ko. 2 IC Nid<<ay 240kV Ko. 3 IA 18 240kV Vest Bus (115V.) FREQ. 19 PA'idway 240kV Ho. 3 le 20 Hid<<ay 240kV Ko. 3 IC 21 Hidway 240kV Ko. 1 ICAR 22 Unit Ko. 1 22kV Sync. Volt. VA-K Nid<<ay 240kV Ko. 1 CAR START 24 Unit Ko.2 22kV Sync. Volt. VA-K Hid<<ay 240LV Ko. 2 'CAR Nidway 240kV Ko. 2 VC-K Hid<<ay 2404V Ko. 2 CAR-START 28 240kV East Bus PA VA-K 29 Hid<<ay 240I V Ko. 3 I CAR 30 240kV vest eus pA VA-H

V % ss~ssssss s~ ~ >sr ~ ~ ~~as~ W

'I 4 ~ 'I,,

4" 4

~

~ ~ $

I I 'I 4 ~ I ~ ~ ~

~ ~ 'll " III ' ~4 l4" -4','l \Ill'ill

~ 4 I~ ~ 4" '4 I 4 ~ \~ I'l \ ~

4

~ '4.l

(

4

~ I

~ I ~

I~

~ I

~ ~ ~ l ~

' Sl 4 I ~ ~ ~ ~ ~ '

'll I I'*III,~ ~ 44 44 ~ 4~ I 'ls 4 ~ I 'I ~ ~~ ~ 4 ~~ ~ I ~ I 4" ' 4 ~ I ~~ I 4I:"

'4'

~

~~ I ~ I

~

I s ~

"~ '

I"

~~ I 44 4 44 s

~ '4 44 \'4 I lsi' I ~,-4 ~ I 4 4'TAT ls IOI,'T. LUC I E ~ I I ~ +' 'I ~ I 4

  • T INE: 07: 5 07 I:

OSC ILLOGRAPH NO.: 07

~ I + 'I tI ~ ~~ I "ItI" ~

I I~ ~ ~ I I,, ~ I ~ *~ - ~ ~ ~ . ~ II

~ 'it ~

~ I ~ Ii I' I 1I t ~

~ I

~ lt ~ t ~ I

, ~ I ~ Ilt tlt

~ ~ ~ ' ~, ~ ~ I ~

I I I 1>>

I ~,

J lt' I ~ ~ ' ' ~ ll Itt

~ ~ tt ~ ~

I ~ ~ I,, lt I ~,I II ~ ~ Itl' I~ I ~ ~~ I ~ ~I tiI ~ ~ I ~, ~ Ii II itI ~

Nid//ay 240kV t>>o..'-H Ni*/ay 240ky Ho. 1 VS-H Ni<h/ay 240kV t(o. 1 Vc-tl Hid~ay 240kV Ho. 1 IA Ni/key 240kV Ho. 1 '8 Nid//ay 240kV Ho. 1 Ic Ni/k/ay 240kV Ho. 2 VA-M Ni/k/ay 240kV Ho. 2 3 lo Ni*/ay 240kV Ho. 2 VS-H t ~-

Hid~ay 240kV Ho. 3 Vc-H 10 Nid//ay 240kV Ho. 3 3lo Nid//ay 240kV Ho. 3 VA-H 12 L~>>

Nid//ay 240kV Ho. 3 Vs-M 13 I'I Nid//ay 240kV Ho. 1 3lo Ni/k/ay 240LV Ho. 2 IA 15 Hi&ray 240kV t>>o. 2 IS 16 Nid//ay 240kV llo. 2 IC 17 Nid/ay 240kV tlo. 3 IA 18 240kV l>>eSt SuS (115V.) FREQ. 19 PA'I/h/ay 240kV Ho. 3 IS 20 Nid//ay 240kY Ho. 3 Ic 21 NI*/ay 240kV t>>o. 1 I CAR 22 Unit Ho. 1 22kV Sync. Volt. VA-M 23 NI*/ay 240kV Ho. 1 CAR START 24 Unit Ho.2 22kV Sync. Volt. VA-H 25 Ni*/ay 240kV Ho. 2 CAR 26 Nid//ay 240kV tlo. 2 Vc-H 2/

Nldway 240RV Ho. 2 CAR-START 28 240kV East Sus PA VA H Ni/k/ay 240sV Wo. 3 ICAR STATION: ST. LUC I E 240kV Vest Bus PA TIHE: 07:SI:ls VA-H OSC ILLOQRAPH liO, t 08 Nia./ay 240sV Ho. 3 CAR eTART

'h r Midway 240,V No.

Midway 240wV No. 1

'A- VS-N t

v Midhhay 240RV Ho. 1 VC H Midhway 240rV HO. 1 'A Midway 240aV No. 1 Midway 240RV Ho. 1 IC 6 r Midway 240~V No. 2 VA-N h Midway 240:V No 2 3ic v

Midway 240aV No. 2 VS-:I Mid hay 240~V No. 3 VC-N :0 Midway 240eV Ho. 3 3lc h

Midway 240RV No. 3 VA-N 2 v

v Midway 240aV Ho. 3 Ve-H -3 Ivh h Midway 2404V No. 1 310 4 Midway 240<V No. 2 IA :5 MIdway 240sV No. 2 IS Mid~ay 240<V Ho. 2 IC Nidway 240aV No. 3 IA 240kV Vest Bus (115V.) FREQ.

PA'idway 240kV No. 3 20 Midway 240kV No. 3 IC Midway 2404V Ho. 1 I CAR Unit No. ~ 22kV Sync. Volt. VA-N Midway 240rV No. 1 CA'TART 24 =

Unit No.2 22kV Sync. Volt. VA-;I 25 .

Mid hay 240sV No. 2 CAR 2c Midway 240rV Ho. 2 VC.H v Midway 240sV Ho. 2 Ct" START 240kV East Rus PA VA-H STATIOH: ST. LUCIE Midway 240.V No. 3 IC;R TIME: 07:58:42 240kV Vest Bus PA VA-. OSCILLOCRAPM NO.: 09

Hiduay 240LV No. 1 A-H Hiduay 240LV Ho. 1 VB N 2 I i, Hlduay 240LV No. 1 VC-H 3 jl Hiduay 240kV No. 1 'A Hidey 240kV Ho. 1 '8 Hiduay 240kV Ho. 1 IC Hlb'ay 240kV Ho. 2 VA-H Hidey 240ky Ho. 2 3lo Hi*iay 240kV No. 2 VB-H Hiduay 240kV No. 3 VC-H 10 ~

)

Hiduay 240kV Ho. 3 3lo Hiduay 240kV No. 3 VA-H 12 Hihsay 240kV Ho. 3 8-H 13 ~

Hiduay 240kV No. 1 3lo HI&ray 240kV Ho. 2 IA 15 Hldaay 240kV No. 2 IB 16 Hlhiay 240kV Ho. 2 .IC i'ldway Nlduay 240kV Ho. 3 'A 1e L 240LV Vest Bus (115V.) FREQ. 19 PA'iduay 240kV No. 3 IB 20 240kV No. 3 IC 21 Hid~ay 240kV No. 1 I CAR Unit No. 1 22kV Sync. Volt. VA Hi&ray 240kV Ho. 1 CAR-START Unit Ho.2 22kV Sync. Volt. VA H 25 I

HIduay 240kV No. 2 CAR 26 )

Hid+ay 240ky No. 2 VC-N C"R START

/~-

Hid~ay 240kV Ho. 2 2B 240LV East Bus PA VA-N 2$

Hiduay 240LV Ko. 3 I CAR 30 STATION: ST. LUC IE 240kV Vest Bus PA VA-N 3: TIHE: 07:58:52 OSCILLOGRAPH HO. l IO gldwsv gl nvu nn ma-.T.

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~EcT IVC . I I QQ((>,'978 i OSC fiE(.OllD ri~. rio.

UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION Before the Atomic Safet and Licensing Appeal Board In the Matter of FLORIDA POWER & LIGHT COMPANY )

~ Docket No. 50-389 (St. Lucie Nuclear Power Plant, Unit No. 2)

CERTIFICATE OF SERVICE I hereby certify that copies of the attached letter to William D. Paton, Esq., dated May 25, 1978, together with the "Report on System Disturbance, May 14, 1978," prepared by Florida Power'& Light Company and dated May 25, 1978, have been mailed this 25th day-of.May, 1978, to the persons shown on the attached service list by deposit in the United States mail, properly stamped and addressed.

HAROLD'. REIS Lowenstein, Newman, Reis & Axelrad 1025 Connecticut Avenue, NW Washington, DC 20036 Telephone: (202) 862-8400 Date: May 25, 1978

UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION Before the Atomic Safet and Licensing Ap eal Board In the Matter of FLORIDA POWER 6 LIGHT COMPANY )

Docket No. 50-389 (St. Lucie Nuclear Power ).

Plant, Unit No. 2)

)

SERVICE LIST Mr. C.R. Stephens Supervisor, Docketing and Service Section Of fice of the Secretary'f the Commission Nuclear Regulatory Commission Washington, DC 20555 Michael C. Farrar, Esquire Chairman Atomic Safety & Licensing Appeal Board Nuclear Regulatory Commission Washington, DC 20555 Dr. W. Reed Johnson Atomic Safety & Licensing Appeal Board Nuclear Regulatory Commission Washington, DC 20555'ichard S. Salzman, Esquire Atomic Safety G Licensing Appeal Board Nuclear Regulatory Commission Washington, DC 20555 Alan S. Rosenthal, Esquire Chairman Atomic Safety 6 Licensing Appeal Panel Nuclear Regulatory Commission Washington, DC 20555 Edward Luton, Esquire Chairman Atomic Safety 6 Licensing Board Panel Nuclear Regulatory Commission DC 20555 'ashington,

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