EO 1 Block 3 Gland Steam

Question 1

State two (2) purposes of the gland seal system.

Answer 1

Seals the Main Turbine and Main Feed Pump Turbine shafts to prevent Air in-leakage.

Seals the Main Turbine and Main Feed Pump Turbine shafts to prevent Steam out-leakage.

Question 2

Which ONE of the following Main Turbine indications can be read in the plant?

A. Speed
B. Bearing vibration
C. Steam seal pressure
D. HP turbine exhaust pressure

Answer 2

C

Question 3

During power operations, what is the normal pressure range for the gland steam header?

A. 2.5 psig to 4.5 psig
B. 0.5 psig to 2.5 psig
C. 4.0 psig to 6.0 psig
D. 9.0 psig to 10.0 psig

Answer 3

A

Question 4

During power operations, what is the normal pressure range for the gland steam header?

A. 2.5 psig to 4.5 psig
B. 0.5 psig to 2.5 psig
C. 4.0 psig to 6.0 psig
D. 9.0 psig to 10.0 psig

Answer 4

A

Question 5

During normal operations, which of the following readings is in the normal vacuum range for the
Gland Exhaust header as read on the local Pl at the Steam Packing Exhauster fans, 603’ Turbine
Building? (Assume packing is in good condition.)

A. 4” H20
B. 10” H20
C. 4 psig
D. 10 psig

Answer 5

B

Question 6

Main Feed Pump Turbine gland sealing steam is supplied from which one of the following sources
during 50% power operation?

A. Main Steam to the Main Feed Pump Turbine Steam Seals Header.
B. 50 pound Auxiliary Steam Header to the Main Feed Pump Turbine Steam Seals
C. 8th Stage Extraction Steam to the Main Feed Pump Turbine Gland Seal Steam Header.
D. Leakage from the Main Feed Pump Turbine High Pressure gland to the Low Pressure gland.

Answer 6

D

Question 7

Match the system or component listed in the left column with the corresponding statement listed in
the right column

1. Main Steam Auxiliary Steam
2. Auxiliary Steam
3. Main Turbine
4. Condensate System

A. Supplies Gland Steam (GS) from 0% to 2% Reactor power.

B. Supplies Gland Steam from 2% to approx. 50% load.

C. Cools the steam-air mixture in the Steam Packing Exhauster.

D. Utilizes steam seal header until leak-off from within itself overcomes header flow.

E. Supplies driving force for gland seal exhaust fans.

Answer 7

1. B
2. A
3. D
4. C

Question 8

Match the Source of steam for the Gland Steam Header for the following power levels:

Power level
A. 0%
b. 25%
C. 75%
D. 100%

1. Auxiliary Steam
2. Main Steam
3. Leakoff from High Pressure Turbine

Answer 8

A. 1
B. 2
C. 3
D. 3