ML17263A193
| ML17263A193 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 03/24/1993 |
| From: | Marlow T ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17263A191 | List: |
| References | |
| AP-TURB.3, NUDOCS 9304080156 | |
| Download: ML17263A193 (9) | |
Text
EOP:
P-TURB.3 TITLE TURBINE VIBRATION REV:
6 PAGE 1 of 6 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE
~~ <.N PLANT SUPERINTENDENT EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:
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9304080'g 930330'Do~K0SO00aqq.
EOP:
P-TURB. 3 TURBINE VIBRATION REV:
6 PAGE 2 of 6 A.
PURPOSE This procedure provides the necessary actions
.to be taken in the event of increasing turbine vibrations.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
SYMPTOMS The symptoms of TURBINE VIBRATION are; a.
Annunciator I-27, Rotor Eccentricity or Vibration alarm is lit.
b.
Increasing or High Turbine'ibration detected.
v,I.
EOP:
P-TURB.3 TURBINE VIBRATION REV:
6 PAGE 3 of 6 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
The exciter bearing No.
9 is not as limiting as the turbine bearings Nos.l through 8.
1 Check Turbine Vibration:
o Bearings No.
1 through No. 8-LESS THAN 14 MILS o
Bearing No.
9 - INDICATION ON SCALE Perform the following:
- a. Trip the turbine.
b.
Go to AP-TURB.1, TURBINE TRIP WITHOUT RX TRIP REQUIRED OR E-Oi REACTOR TRIP or SAFETY INJECTION, as required.
2 Check No.
9 Bearing Vibration LESS THAN 14 MILS Initiate load reduction to decrease vibrations.
IF vibrations can NOT be reduced, THEN shutdown the plant, (Refer to 0-2.1, NORMAL SHUTDOWN TO HOT SHUTDOWN).
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EOP $
P-TURB.3 T1TLF.$
TURBINE VIBRATION REV:
6 PAGE 4 of 6 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION IF AT ANY TIME VIBRATIONS EXCEED 14 MILS, THEN RETURN TO STEP 1.
3 Check Turbine Vibration:
- a. Bearings No.
1 through No.
8 LESS THAN 7 MILS
- a. Attempt to stabilize vibration as follows:
o IF increasing turbine speed, THEN stop speed increase and evaluate.
o IF generator on line, THEN begin reducing load to stabilize vibrations.
- b. Bearing No.
9 - LESS THAN 7 MILS
- b. Attempt to stabilze vibrations as follows:
o Adjust generator hydrogen temperature,
-OR-o Adjust turbine lube oil temperature,
-OR-o Adjust exciter cooling.
EOP:
P-TURB.3 TURBINE VIBRATION REV 6
PAGE 5 of 6 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 4 Evaluate Plant Conditions:
a.
Check turbine vibrations STABLE OR DECREASING
- a. Continue load reduction until turbine vibrations stabilize.
IF vibrations can NOT be stabilized with the plant at
- power, THEN take unit off line (refer to 0-2.1, NORMAL SHUTDOWN TO HOT SHUTDOWN).
- b. Stop load reduction 5 Establish Stable Plant Conditions:
a.
Tavg - TRENDING TO TREF
- a. Insert control rods or, if necessary decrease turbine load to match Tavg to Tref.
b.
PRZR pressure
- TRENDING TO 2235 PSIG
- b. Verify proper operation of PRZR heaters and spray or take manual control of PRZR pressure controller 431K.
c.
PRZR level - TRENDING TO PROGRAM
- c. Verify proper operation of charging pump speed controllers
~ OR take manual control of speed controllers to control PRZR level.
- d. Rod insertion limit alarms-EXTINGUISHED
- d. Borate as necessary and withdraw control rods to clear insertion limit alarms (refer to affected rod bank alarm response procedures if necessary).
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EOP:
P-TURB 3
TURBINE VIBRATION REV:
6 PAGE 6 of 6 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 6 Evaluate Turbine Operation:
- a. Verify no unusual noises exist locally at turbine generator
- a. IF unusual noises
- detected, THEN notify the Maintenance Manager.
- b. Monitor turbine supervisory instrumentation to ensure conditions stable 7 Notify Higher Supervision
- END-