Bwr Condenser Air Removal / Offgas / Diesel Generators/ Leak Detection System

Front 1

Establish initial vacuum in the Main Condenser

Back 1

Condenser Air Removal System

Front 2

Remove non-condensible, radioactive and potentially explosive gases from the Main Condenser

Back 2

Condenser Air Removal System

Front 3

The Mechanical Vacuum Pumps are _____ type compressors

Back 3

water-sealed, rotary air

Front 4

Mechanical Vacuum Pumps take a suction on the _____ and discharge through a discharge separator and discharge silencer to the ____

Back 4

Main Condenser / Turbine Plant Ventilation Filter Train.

Front 5

The ___ SJAE removes noncondensible gases from the SJAE Intercondenser and discharges them along with its driving steam to the ___ for processing

Back 5

second stage / Offgas System

Front 6

The first stage SJAE takes a suction directly from the _____ through a baffled region, to ensure most of the gas flow is dry, and discharges into the SJAE Condenser (Intercondenser) where the steam is condensed by Condensate System flow going through the SJAE Intercondenser tubes.

Back 6

low pressure Main Condenser shells

Front 7

Each SJAE uses a high velocity jet of ____to act as a jet pump for the removal of noncondensible gases from the ____.

Back 7

steam / Main Condenser shells

Front 8

- Minimize and control the release of radioactive gas into the atmosphere
- Minimize the potential of a hydrogen explosion by reducing the hydrogen concentration to less than ___

Back 8

Offgas

4%

Front 9

Heats the gas mixture coming from the Second Stage Air Ejector, using Main Steam, to remove moisture and raise Recombiner efficiency

Back 9

Preheaters

Front 10

Preheaters - Heats the gas mixture coming from the ____, using Main Steam, to remove moisture and raise Recombiner efficiency

Back 10

Second Stage Air Ejector

Front 11

Recombines the hydrogen and oxygen to reduce the Offgas volume and hydrogen concentration

Back 11

Catalytic Recombiner

Front 12

Reduces mixture volume by condensing the water vapor in the process flow using Condensate as the cooling medium

Back 12

Offgas Condenser

Front 13

Removes entrained water droplets from the process flow

Back 13

Water Separator

Front 14

Delays process flow by providing a tortuous path to allow decay of short-lived isotopes

Back 14

Holdup Line

Front 15

Cools gas mixture using Glycol as a cooling medium

Back 15

Cooler Condenser

Front 16

Removes water droplets prior to the process entering the Prefilters

Back 16

Moisture Separator

Front 17

Removes particulate daughter products which come from decay of short-lived noble gases

Back 17

Prefilter

Front 18

Removes moisture and lowers the dew point of the process flow prior to entry into the Charcoal Beds. System has regenerators which regenerate the desiccant dryer when required.

Back 18

Gas Dryer System

Front 19

Adsorbers adsorb (holdup) fission products to allow gas release to be within acceptable limits. Refrigerated vault maintains temperature very low to ensure process flow is slow to enhance adsorption process

Back 19

Refrigerated Charcoal Adsorbers and Vault

Front 20

Filter out any remaining particles including charcoal particles prior to the process entering the Main Plant Exhaust Ventilation

Back 20

After Filters

Front 21

State what happens to the Offgas System upon a High-High-High Radiation Signal on the final discharge line including the effects on plant operation.

Back 21

The Offgas System isolates upon a High-High-High Radiation alarm on its discharge. If the problem was not corrected immediately, Main Condenser vacuum would be lost and the plant would have to be shut down.

Front 22

The Standby Diesel Generators (Div I and Div II) will automatically start when the following conditions are present:

Back 22

RPV Water Level Low – Level 1

High Drywell Pressure – 1.68 psid

Associated Emergency Bus undervoltage

Front 23

The Standby Diesel Generators are normally in a ____– ready for automatic start condition. (Normally not running.)

Back 23

standby

Front 24

The Standby Diesel Generators supply power to ____ when needed.

Back 24

safety-related loads

Front 25

The Standby Diesel Generators are rated for _____.

Back 25

3130 Kw

Front 26

The HPCS DIESEL GENERATOR will automatically start when the following conditions are present:

Back 26

RPV Water Level Low – Level 2

High Drywell to Containment Pressure – 1.68 psid

Front 27

The HPCS DIESEL GENERATOR is rated for ____.

Back 27

2600 Kw

Front 28

What is the HPCS Diesel Generator's respective emegency bus?

Back 28

DIC III, E22-S004

Front 29

State the five (5) types of parameters monitored by the Leak Detection System.

Back 29

Temperature
Pressure/Differential Pressure
Flow rate/Differential Flow Rate
Sump Liquid Levels
Radiological Conditions

Front 30

The function of the ____ is to detect leakage from the various systems connected to the reactor vessel, to provide indications, alarms, and some automatic actions.

Back 30

Leak Detection System

Front 31

C. Describe how leakage in the Drywell is detected. (3)
Leakage in the Drywell is detected by the following means:

Back 31

High Drywell to Containment Differential pressure
High Drywell temperature
High Drywell air cooler condensate flow
High Drywell airborne activity
Changes in floor and equipment drain sump levels