ML23241A556

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7 to Updated Final Safety Analysis Report, Chapter 3, Figure 3.2-22, Drawing 102022, Sheet 4, Rev. 56, Turbine and Generator Associated Systems
ML23241A556
Person / Time
Site: Diablo Canyon  
Issue date: 05/25/2023
From:
Pacific Gas & Electric Co
To:
Office of Nuclear Reactor Regulation
Shared Package
ML23241A052 List: ... further results
References
DCL-23-044
Download: ML23241A556 (1)
v • d • e


Text

E D

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0 N

40 41 42 SEE NO TE I--........._

A I R SID E SEA L OJ L -~~----,------~-------

PRESSURE GAUGE RANGE O TO 160 PSIG P I - 2 MA I N BEAR!NG------ 1 OIL FEED

<I[QIID MA I N BEARING---~----_

HYDROG EN SEAL COMB INED BEARING OIL AND AIR SIDE SEAL OIL DRAIN --

" DEFOAM I NG TANK LE VE L HI GH" ALARM LS - 2 __________....-

<KfilD COMB I NED OEFOAM I NG TANK----

DRA I N AND GAS PRESSURE SENS I NG L I NE 43 HYDROG EN INNE R-COOLED TURBINE GENERATOR 44 45 46 47 48 49 NO TE S:

LEGEND I. ~x~R~~~~ n~~Llr~6~ si~~ ~~A~og1~s6t 1NG -{><}-

VA L VE (NORMALLY OPEN J PRESSURE GAUGE THERMOMETER

2.

145 " THICK

-MA I N OIL FEED BEARING

~

--- SEE NOTE I AIR SIDE~

01 L IN LET \

  • - 297 1 FROM GEN BRG 01 L ORA I N LOOP SEAL LS-3A/3B HJGH/LOW LEVEL SWITCH

<KillD VA L VE (NORMALLY CLOSED J

~

VA L VE (NORMALLY THROTTLED)

~::--

CHECK VAL VE

[Q]

REL IEF VAL VE ORIFICE OIL ALARMS IT2J DEFOAM I NG TANK LEVE L-HIGH

[ill AIR S I DE SEAL OIL PUMP-OFF

@]

SEAL OI L PRESSURE-LOW

[!]

HYDROGEN SI DE LE VEL-L OW ELECTRICAL CONNECT I ON PRESSURE SWITCH SOLENOID VALVE

[8J SEAL OI L TURBINE BACKUP PRESSURE-LOW

[fil HY DROG EN S I DE SEAL OI L PUMP - OFF

[ill A I R S I DE SEAL OIL BACKUP PUMP-RUNN I NG CON DE NSED OP ERAT I NG INS TRUCTI ONS SEE INSTRUCTION BOOK FOR COMPLETE OPERATING INSTRUCT I ONS GENERA L -SEA L OI L PRESSURE MUST BE MAINT A INED AT THE HYDROG EN SEALS WHEN HYDROGEN I S I N TH E GENERATOR OR WHEN THE SHA FT IS TURNING.

THE HYDROGEN PRESSURE MAY BE VARIED UP TO 75 PS I G.

SEAL OIL PRESSURE IS NORMAL L Y MA I NTAINED AT 12 PSI ABOVE THE HYDROGEN PRESSURE. 3 PS]

I S REQUI RED TO MAINTAIN A SEAL WHEN RUNNING.

THE VAPOR EXTRACTORS SHOULD BE OPERATED CONTINUOUSLY WHEN THE GENERATOR IS FILLED WI TH HYDROGEN.

HYDROGEN SHOUL D BE PURGED FROM THE GENERATOR BEFORE MA I N OIL RESERVOIR rs DRAINED.

THE GENERATOR CAN BE OPERATED WI TH THE HYDROGEN S I DE SEAL OIL PUMP OFF.

DUPLEX FI LTERS PROV I DE FOR ON-LINE FI LTER ELEMENT REPLACEMENT.

REF ER TO INSTRUCTION MANUAL DC -663 280 - 41 SEA L OIL SUPPLY-EMERGENCY SOURCES MAIN OI L PUMP ON TURBIN E SE AL OIL BACK UP PUMP ON MAIN OIL RESERVIOR AIR SIDE SEAL OI L BACKUP SHAFT~ WIL L MA I NTA I N 75 PSlG HYDROGEN PRESSURE PUMP TURNING GEAR BEAR I NG OIL PUMPS WI LL MA I NTA I N 2 PS IG HYDROGEN PRESSURE THE TURBINE BACKUP REGULATOR VALVE 264 OPENS WHEN THE DIFFEREN-T I AL PR ESSURE AT THE SEALS DECR EASES TO 8 PSI. THEN I F TH E SEAL DIF FERENTIA L PRESSURE DECREAS ES TO 5 PS!, PRESSURE SW I TCH [TI)

ACTIVATES THE AIR S I DE SEAL OIL BACKUP PUMP ON THE SEAL OI L UNIT AND THE DIFFERENTIAL PRESSURE IS RESTORED TO 12 PSI.

TH E NEXT SOURC ES OF EMERGENCY OI L AFTER THE A I R SID E SE AL OI L PUMP AR E THE TURNING GEAR BEAR I NG OI L PUMP S ON THE MAIN OIL RESERV I OR.

THESE CAN MAINTAIN A PRESSURE OF 2 PSIG ONLY.

WHEN THE A I R SIDE SEAL OI L IS RUN-HYDROGEN PRESSURE SHOULD BE REDUCED TO 2 PS I G I F THE SEAL PUMP ON THE RESERVIOR IS NOT AVA I LA BLE.

TO PLACE EQUIPMENT I N OPERA T ION-SET VALVES AS IND I CA TED.

START AIR SIDE SEAL OIL PUMP AND FILL OEFOAMJNG TANKS AND HYDROGEN SIDE DRAIN REGULATOR. STAR T HYDROGEN SIDE SEAL OI L PUMP.

EQUIP-MENT IS THEN IN NORMAL OPERATION.

UN I T DIABLO CA NYO N POWER PLANT - PG& E CO.

TURBI NE AND GENERA TOR ASSOCIATED SYSTEMS E

D C

B A

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