ML20138J582

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Rev 21 to OP 340, 24 K Electrical Sys
ML20138J582
Person / Time
Site: Millstone Dominion icon.png
Issue date: 10/31/1984
From: Sauer G
NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20138J567 List:
References
NUDOCS 8510290393
Download: ML20138J582 (11)
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Text

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8-25-83 E.J. Mroczka Form Approved by Station Superintendent Effective Date STATION PROCEDURE COVER SHEET A. IDENTIFICATION Number OP 340 Rev. 21 Title ~24K ELECTRICAL SYSTEM Prepared By Gregg Sauer ,

B. REVIEW I have reviewed the above procedure and have found it to be satisfactory.

TITLE SIGNATURE DATE DEPARTMENT HEAD /r' oi /o!.Ud sco WM I

Al-> En[

C. UNREVIEWED SAFETY QUESTION EVALUATION DOCUMENTATION REQUIRED:

p (Significant change in procedure method or scope C/ as described in FSAR) YES [ ] NO[g (If yes, document in PORC/SORC meeting minutes)

ENVIRONMENTAL IMPACT (Adverse environmental impact) YES [ ] NO [

(If yes, document in PORC/SORC meeting minutes)

D. PROCEDURE REQUIRES PORC/SORC REVIEW YES NO [ ]

E. OS /SORC APPROVAL

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ORC Meeting Number k N- M2 F. APPROVAL AND IMPLEMENTATION The attached procedure is hereby approved, and effective on the date below:

h sy # // fo .7WP Station / Service / Unit W erintendent Effective Date SF-301 Rev. 6

, s J l 8510290393 851004  :

PDR ADOCK 05000245 i P PDR- '

OP 340 Pegn 53

, Rev. 21 8.32 Alternator Field Ground. '

8.32.1 Location:

8.32.1.1 CRP 907, Section A2-2 (39B), Window 6-7 8.32.2 Initiating Device:

8.32.2.1 64FA Relay 8.32.3 Setpoint:

8.32.3.1 1000 ohms to ground. ,

8.32.4 Automatic Action:

8.32.4.1 Alarm only.

8.32.5 'Immediate Operator Action:

8.32.5.1 Initiate action to have electrician determine cause of ground.

8.32.6 Subsequent Operator Action:

8.32.6.1 If ground can't be located or repaired shutdown the alternator.

8.33 Failure of 15G-5T-2 and 15G-6T-2 Breakers to Open Following Generator Lockout Relay Operation

)

NOTE: The following step should only be taken as an emergency means of generator / grid separation after it has been determined that normal lockout tripping function has not occurred.

8.33.1 Simultaneously depress both pushbuttons on CRP 907 labelled "5T and 6T Emergency Trip".

8.34 RSST Undervoltage Channel "A" 8.34.1 Location:

8.34.1.1 CRP 908, Section Al-1 (54A), Window 7-3 8.34.2 Initiating Device:

8.34.2.1 AGASTAT 62/2A 8.34.3 Setpoint:

8.34.3.1 Low primary voltage, 345 kv setpoint on RSST or CB IAC 51/52 and VAC 51/52 are open.

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- ~ _ _ _ . . _ _ - - . _ - _

OP 340 Page 54

, Rev. 21 8.34.4 Automatic Action:

8.34.4.1 Alarm only.

NOTE: Be aware of a possible RSST low side breakers opening if a low voltage condition is present during a plant accident (MCA).

8.34.5 Immediate Operator Action:

8.34.5.1 Call CONVEX to raise system voltage above 345 kv.

8.34.5.2 If the 345 system voltage cannot be main-tained above 345 kv, 347 kv when supplying Unit 2 with shutdown power, notify the Duty Officer.

NOTE: The reason for the preceeding

1) voltage limits is the possibility of long term degradation of safety related motors.

8.34.6 Subsequent Operator Action:

8.34.6.1 If the system voltage is greater than 345 kv (347 kv when supplying Unit 2) and the reactor is in cold shutdown, open the undervoltage trip disconnect on the back of CRP-9228.

8.34.6.2 If the reactor is operating and the generator is synchronized to the system and either the 345KV system voltage cannot be maintained above 345KV, (347KV when supplying Unit 2), or the generator current is greater than 17.5 kilo amps as indicated on CRP-907 then carry out the following:

OP 340 Page 55

, Rev. 21 8.34.6.2.1 Notify convex of your intention to reduce reactor power using the recirculation pesps. This will reduce the generator current to the normal cperating reading of 117.5 kilo amps as indicated on CRP-907.

8.34.6.2.2 Continue to reduce reactor power until the generator current has returned to a normal reading of 117.5 kilo amps. Normally within a 10%

power reduction the generator current will have returned to normal.

0 NOTE: If after a 10%

power reduction the 345KV system voltage hasn't returned, this is indicative of a major problem.

8.34.6.2.3 Start the gas turbine and diesel generator and let idle.

8.34.6.2.4 Monitor bus voltage on buses 14A, 14B, 14C, 14D.

If the voltage drops to 3646 volts on any two buses notify Convex that we want to open the 15G-5T-2 and'

OP 340 Paga 56

, Rev. 21 15G-6T-2 breakers. Before opening the 15G-5T-2 and 15G-6T-2 open the main steam bypass valves about 10%

using the speed load changer. With Convex permission open the.15G-5T-2 and 15G-6T-2 breakers using the Getac. Do not use the ST& 6T Emergency trip buttons on CRP-907 as this will also trip the turbine.

8.34.6.2.5 Adjust generator speed and excitations using the speed load changer and the Auto field voltage adjust switches.

8.34.6.2.6 Refer to ONP-503A for added procedural guidance.

8.35 RSST Undervoltage Channel "B" 8.35.1 Location:

8.35.1.1 CRP 908, Section Al-1 (54A), Window 7-4 8.35.2 Initiating Device:

8.35.2.1 AGASTAT 62/28 8.35.3 Setpoint:

8.35.3.1 Low primary voltage, 345 kv setpoint on l RSST or CB IAC 51/52 and VAC 51/52 are open.

8.35.4 Automatic Action:

8.35.4.1 Alarm only.

NOTE: Be aware of a possible RSST low side breakers opening if a low s

OP 340 Pag 2 57

. Rev. 21 S

voltage condition is present during a plant accident (MCA).

8.35.5 Immediate Operator Action:

8.35.5.' Call CONVEX to raise the system voltage above 345 kv.

8.35.5.2 If the 345 kv system voltage cannot.be maintained above 345 kv (347 kv when supplying Unit 2 with shutdown power) notify the Duty Officer.

NOTE: The reason for the preceeding voltage limits is the possibility of long term degradation of safety related motors.

C.35.6 Subsequent Operator Action:

8.35.6.1 If the system voltage is greater than 345 kv (347 kv when supplying Unit 2) and the reactor is in cold shutdown, open the Undervoltage Trip Disconnect on the back of CRP-922A.

8.35.6.2 If the reactor is operating and the generator is synchronized to the system and either the 345KV system voltage cannot be maintained above 345KV, (347KV when supplying Unit 2),

or the generator current is greater than 17.5 Kilo amps as indicated on CRP-907 then carry out the following:

8.35.6.2.1 Notify convex of your intention to reduce reactor power using the recirculation pumps. This s

l 9

OP 340 Paga 58 Rev. 21

'S will reduce the generator current to the normal operating reading of 117.5 Kilo amps as indicated on CRP-907.

8.35.6.2.2 Continue to reduce reactor power until the generator current has returned to a normal reading of $17.5 kilo amps. Normally within a 10%

power reduction the generator current will have returned to normal.

NOTE: If after a 10%

power reduction the 345KV system i voltage hasn't returned, this is indicative of a major problem.

8.35.6.2.3 Start the gas turbine and diesel generator and let idle.

8.35.6.2.4 Monitor bus voltage on buses 14A, 14B, 14C, 140.

If the voltage drops to 3646 volts on any two buses notify Convex that we want to open the 15G-ST-2 and 15G-6T-2 breakers. Before opening the 15G-5T-2 and 15G-6T-2 open the main steam s

1 1

OP 340 Paga 59 '

Rev. 21 3

bypass valves about 10% using the speed load changer. With Convex permission open the 15G-ST-2 and 15G-6T-2 breakers using the Getac. Do Not use the ST&6T Emergency trip buttons on CRP-907 as this will also trip the turbine.

8.35.6.2.5 Adjust generator speed and excitation using the speed load changer and the auto field voltage adjust switches.

8.35.6.2.6 Refer to ONP-503A for added procedural guidance.

8.36 Main Transformer High Temperature 8.36.1 Location: Panel 907 Sectica A2-1 (398) Window 7-2 8.36.2 Instrument: 49X and/or 26QX 8.36.3 Setpoint: Winding temp reached 120 C or Oil temp has reached 90 C 8.36.4 Automatic Action: Alarm only 8.36.5 Immediate Action 8.36.5.1 Verify temp on recorder at panel 931 and at transformer.

8.36.5.2 If verifed, back down on generation to allow transformer to cool below alarm point.

l 8.36.6 Subsequent Action 8.36.6.1 Notify Convex '

j 8.36.6.2 If not verified, call station electrician l

to troubleshoot alarm. .

8.37 Generator 345KV Bus BU Pilot Wire Failure 8.37.1 Location: Panel 907 Section A2-2 (398) Window 3-6 l

- e-APPRCNED BY DA'IE M8 Y E0EM NO, 230-704 7- 2A -O " CRP-908 Al-1 -REV. 4 -

PORC MLU NO /- 7fac r DATE F/JJ/sy 4 KV BUS 14A ,4 W BUS 14A 4 KV BUS 14A 4 KV BUS 14A GROUND FEEDER GROUND NORM. SS TRANSEMMER RES SS TRANSEVEGER (1-1) (1-2) TRIP (1-3) TRIP (1-4) 4 KV BUS 14B 4 KV BUS 14B 4 KV BUS 14B 4 KV BUS 14B GROUND FEEDER GROUND NORM. SS 'IRANSEMMER RES. SS TRANSEMMER .

(2-1) (2-2) TRIP (2-3) TRIP (2-4) 4 KV BUS 14C 4 KV BUS 14C 4 KV BUS 14C 4 KV BUS 14C GROUND FEEDER GROUND NORM. SS TRANSEU MER RES. SS TRANSEW MER (3-1) (3-2) TRIP (3-3) TRIP (3-4)

.4 KV BUS 14D 4 KV BUS 14D 4 KV BUS 14D 4 KV BUS 14D GROUND FEEDER GROUND NORM. SS TRANSEU MER RES. SS TRANSEMMER (4-1) (4-2) TRIP (4-3) TRIP (4-4) 480 V BUS 12C 480 V BUS 12C 480 V BUS 12 C A m 480 V BUS 12C GROUND (5-1) FEEDER TRIP (5-2) 12D IN PARALLEL (5-3) IOSS OF DC CW POWER (5-4)

IIEE NATER FION LUBE NATER FIOf IUBE WATER FICW IUBE NATER FICW SW FS-4-2A ID FION (6-1) SW FS-4-2B ION FIOf (6-2) SW FS-4-2C ID FION (6-3) SW FS-4-2D ID FICW (6-4)

PRI PIIDP WIRE AUITNATIC POLURIN RSST Ut0ERVOL'DGE RSST UBOERVOLTAGE IMS OF DC (7-1) M NTIOR TROUBLE (7-2) OIA MEL A (7-3) OIA M EL B (7-4)

/

BK UP PIIUP WIRE ELBCP. IPR INLET FILTER AMUNCIA'ICR SUPPLY STA. BAITERY 101A IOSS T DC (8-1) DIFF. PRESS (HI-HI) (8-2) NBGATIVE GROUfo (8-3) Ot11 bur BRKR OPDi (8-4)

BACK UP 15 PSI IOSS T DC POWER GAS 'IURBINE AWUNCIA'IOR SUPPLY GEN. CORE MENTIOR CCNTR. BM. PNL TRCUBLE POSITIVE GR0t.20 HIGH LEVEL (CC 11A-2) (9-1) .(9-2) (9-3) (9-4) e-il/CRP1 FORM No. 230-704 REV. 4

.. APPROVED BY: #/4//det. DATE: V- / 5 - S 2. PORC MTG fiO: /- 2IcSt / _

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ANNUf1CIATOR ALARM AfiD RESPONSE .

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PANEL / SECTIO;; 908 Ai-1

  • 7-3

. WINDOW ALARM TITLE RSS,T Undervoltage Channel A INSTRUME?iT AND SETPOINT

) 62-2A Relay - Low Primary voltage,'34,3 KV setpoint on RSST or CB IAC .

J, 51/52 and VAC.51/52 are open.

j .- . ,

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AUTO:'ATIC ACTICN .

. . . ~.

Alarm only - ,- ,

NOTE: Be aware of a possible RSST low s'ide breakers opening if a low t

voltatje condition is pre.sent during a plant accident (MCA).'

  • IMMEDIATE ACTION , ,
1. Call Convex to' raise system voltage above 343 KV. - -
2. If the 345 syster voltage cannot be maintained above 341 K'V, 347 KV when suppling Unit 2 with shutdown power, notify the duty officer.

~

NOTE: The reason for the preceeding voltage ,Iimits is the possibility of long term degradation of safety related motors.

I SUBSCOVENT ACTIGil '

OP 340 Section 8.34.6 REfERENC C 0.P. 340 TECH. SPEC. _ NA P.&.I.D.

NA C.W.D. 222 OPS FORM 230-756 PEV n

AFer8s, w s :; # / /v4/ f *C// DATE: --) s2 PORC fiiG ti3: /-2<-</

3 .

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- ANNUtiCIATOR ALARM AfiD RESPCNSE .

PANEL /SECTION 908 Al-1 -

WIfiD0',1 7-4 ALARM TITLE .

RSS,T Undervol'tage Channel B INSTRUMENT A:D SETPOI:T e . . .

62-2B , Relay - Low primary voltage, 345 KV setpoint on RSST or CB IAC '

! 51/52 and VAC 51/52 are open _ -

j . . -

j -

AUTOMATIC ACTICil , ,

Alann only . ,,. ,

NOTE: Be aware of a' 'possible RSST low si'de breakers opening if a low voltage condition is,present dur'ing a~~ plant accident (MCA).

))

IMMEDIATE ACTION . .

Call Convex to raise sysrtem voitage above 343 KV.

1. .
2. If the 345 system voltage cannot be maintained above 341 KY, 347 KV when supplying. Unit 2 with shutdown power, notify the duty officer.

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.- NOTE: The reason for the prec'eeding voltage limifs is the ' possibility of long tenn degradation of safAty related motors.

SUBSECUE!!T ACTIO!!

, OP 340 Section 8.35.6 l .

R,EFE P.E!:::S

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O.P. 340

  • TECH. SPEC. NA P.& I.D. na C.W.D. 222 ___

"; FC " 230-7E7 R:V. O

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