Skills Assessment - Katan Engineering

Candidate Assessment Group 1

Nuclear HVAC knowledge Assessment

Welcome to the Nuclear HVAC Knowledge Assessment!

1 / 20

Fire and smoke dampers on site commissioning test permits are delivered by Fire brigade.

TRUE

FALSE

2 / 20

HEPA filter is an absolute filter to implement in nuclear ventilation design for particulate air filtration efficiency above 99,95%.

TRUE

FALSE

3 / 20

In nuclear power plant, direct driven centrifugal fans and axial vane fans are applicable in both radiation controlled and non-controlled areas

TRUE

FALSE

4 / 20

Except for reactor, fuel and waste buildings, the ventilation can be designed as conventional ventilation for others rooms in a PWR or BWR nuclear facility.

TRUE

FALSE

5 / 20

In situ iodine filters efficiency test must be performed for only systems connected to stack in order to ensure the protection of personnel and environment.

FALSE

TRUE

6 / 20

In a nuclear facility, the subpressure cascade is only required in permanent radioactive contamination zones as per ISO 17873.

TRUE

FALSE

7 / 20

Electrical heater is recommended upstream iodine trap in order to control humidity of impregnated charcoal and increase the efficiency of filtration

TRUE

FALSE

8 / 20

Fire and smoke dampers on site commissioning is under Manufacturer responsibility. The Manufacturer must check the functionality of fire and some damper after erection completion.

FALSE

TRUE

9 / 20

Select the correct statement (s):

Cautions measures to check by commissioning engineer before test: absence of Foreign Material (FME) and installation of FME barrier where needed, preparation of labeling on test areas and Site notice to release when needed to inform site and co-workers.

All interface systems not ready during fan commissioning must be assessed with related department and with plant system management in order to keep under safety blocking if required.

Prior to start the tests, Site walkdown to perform by Commissioning Engineer (s) and Health and Safety department (H&S)

The test permit of fans can allow commissioning engineer or maintenance technician to get access to confinement space without additional training and without confinement space permit.

Risk assessment is not mandatory for fans commissioning activity as longer health and safety engineer is attending the test.

10 / 20

Select to correct statements? (More than one answer)

Iodine filters can be installed on air supply line or air recirculation line for operation during accidental condition

Pre-filters can designed to operate in accident conditions on airborne contamination line

In normal operation condition of nuclear power plant HEPA filters can be bypassed as there is no risk of air contamination

In accidental conditions, there is no need to operate iodine filters as longer there is no iodine detected in the rooms or systems

HEPA filters can’t be operated without installing a pre-filter upstream on air exhaust line in controlled areas

11 / 20

Nuclear safety requirement is only applicable to physical elements (structure, system and components) of Nuclear ventilation

TRUE

FALSE

12 / 20

What is the correct description in order for following components ?

Iodine filter, Pre-filter, Humidifier, Damper actuator, Pressure measurement testo with pitot, LTD device

Iodine filter, Pre-filter, Pressure measurement testo with pitot, Damper actuator, LTD device , Humidifier

Iodine filter, Humidifier, Pre-filter, Damper actuator, Pressure measurement testo with pitot, LTD device

Pre-filter, iodine filter, LTD device, Damper actuator, Pressure measurement testo with pitot, Humidifier

Iodine filter, Pre-filter, Pressure measurement testo with pitot, LTD device , Damper actuator, Humidifier

Iodine filter, Pre-filter, LTD device, Damper actuator, Pressure measurement testo with pitot, Humidifier

13 / 20

Select the correct statement regarding aeraulic principle (s)

The Total pressure can only be calculated on the basis of static and dynamic pressure.

The total pressure is the sum of dynamic and static pressure.

The static pressure can be measured with pitot tube.

The dynamic pressure can be measured with pitot tube.

14 / 20

System check is not mandatory to start commissioning activity as all evidences, inspection protocol and certificates will be provided at end of construction phase.

TRUE

FALSE

15 / 20

What is the definition of ALARP for nuclear ventilation ?

As Low As Reasonably Practicable is a regulatory principle only applicable to fission reaction building ventilation in order to reduce residual risks.

As Low As Reasonably Practicable is a regulatory principle applicable to all nuclear ventilation systems and components in order to reduce residual risks.

As Low As Reasonably Practicable is a regulatory principle only applicable to radioactive waste building ventilation in order to reduce residual risks.

As Low As Reasonably Practicable is a regulatory principle not applicable to nuclear ventilation.

16 / 20

Fire and smoke barriers are related measures and strategy agreed between nuclear power plant operator and designers to prevent fire and spreading.

TRUE

FALSE

17 / 20

Fire can be used in normal operation if needed by operator to isolate a normal ventilation ductwork.

TRUE

FALSE

18 / 20

What are the correct behaviors when approaching radiation controlled areas ?

Do not interfere with anything that has been provided in the interests of radiation safety

Call fire brigade before entering radiation controlled area

Make your own judgement and decide of crossing or not

Strictly respect site notices and signs

You can enter radiation controlled area if you have a test permit or work order on your name

Never cross radiological barrier you are not permitted to cross

19 / 20

Glove boxes and fume Cupboard ventilation and filtration must be achieved by a separated system before connection to main exhaust lines.

TRUE

FALSE

20 / 20

The relative humidity is a mandatory nuclear safety function to fulfill in radiation controlled areas

FALSE

TRUE

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