FUN 2 EO: 1.4-k - Radiation Protection Tech.

FUN 2 EO: 1.4-k

1 / 12

Which containment design consists of a drywell and a wetwell (suppression pool)?

Only Mark III

Only Mark I

Mark I and Mark II

Mark II and Mark III

2 / 12

What is the principal contributor to dose rates in the first minute that the steam is in the system?

Safety Relief Valves

MSIV

N-16

Steam Dryer

3 / 12

What is the main function of the suppression pool in the Mark III containment design?

To rapidly condense directed steam

To support the drywell

To confine fission products

To provide a heat sink

4 / 12

How quickly are MSIVs designed to fail closed to stop the flow of steam?

1 to 2 minutes

10 to 15 seconds

30 to 45 seconds

3 to 5 seconds

5 / 12

In the Mark III containment, what is the role of the drywell?

To serve as the main steam system

To confine steam during a pipe rupture and direct it into the suppression pool

To provide a heat sink

To store the spent fuel

6 / 12

What is the purpose of the Main Steam System in BWR?

To direct the flow of steam from the reactor to the main turbine and other equipment

To condense steam from the reactor

To support the floor slabs of the reactor building

To prevent fission products from escaping

7 / 12

What is the main purpose of primary containment in Boiling Water Reactor Containments?

To generate steam

To control torsional strain along the Main Turbine Shaft

To contain fission products from a loss of coolant accident and prevent exceeding offsite radiation doses

To store the reactor's spent fuel

8 / 12

What ensures that containment can be isolated in the BWR Main Steam System?

Main Steam Isolation Valves (MSIV)

Moisture Separators

Safety Relief Valves

Steam Dryer

9 / 12

In the Mark II containment design, what is the drywell topped by?

A moisture separator

A suppression pool

An elliptical steel dome

A concrete slab

10 / 12

In the event of over-pressurization, where do Safety Relief Valves and Emergency Relief Valves exhaust to?

Wetwell

Reactor vessel

Suppression pool, Torus, or containment

Main Turbine

11 / 12

What radiological hazard does steam in the Main Steam System pose due to short-lived isotopes?

It condenses rapidly inside the pipes

It emits low energy gamma photons

It causes torsional strain along the Main Turbine Shaft

It causes high radiological conditions needing control for Locked High Radiation Areas

12 / 12

What surrounds the reactor vessel and recirculation loops in the Mark I containment design?

Steam Dryer

Suppression chamber

Drywell

Emergency core cooling systems

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