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

FUN 2 EO: 1.4-k

1 / 12

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

To support the drywell

To provide a heat sink

To confine fission products

To rapidly condense directed steam

2 / 12

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

Steam Dryer

Safety Relief Valves

N-16

MSIV

3 / 12

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

Only Mark III

Only Mark I

Mark II and Mark III

Mark I and Mark II

4 / 12

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

To generate steam

To store the reactor's spent fuel

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

5 / 12

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

Main Turbine

Suppression pool, Torus, or containment

Reactor vessel

Wetwell

6 / 12

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

Moisture Separators

Main Steam Isolation Valves (MSIV)

Steam Dryer

Safety Relief Valves

7 / 12

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

A moisture separator

A concrete slab

A suppression pool

An elliptical steel dome

8 / 12

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

Emergency core cooling systems

Suppression chamber

Drywell

Steam Dryer

9 / 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

10 / 12

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

To prevent fission products from escaping

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

To support the floor slabs of the reactor building

To condense steam from the reactor

11 / 12

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

To store the spent fuel

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

12 / 12

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

It causes torsional strain along the Main Turbine Shaft

It emits low energy gamma photons

It condenses rapidly inside the pipes

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

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