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 provide a heat sink

To support the drywell

To rapidly condense directed steam

To confine fission products

2 / 12

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

Safety Relief Valves

N-16

Steam Dryer

MSIV

3 / 12

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

To support the floor slabs of the reactor building

To prevent fission products from escaping

To condense steam from the reactor

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

4 / 12

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

Suppression pool, Torus, or containment

Reactor vessel

Wetwell

Main Turbine

5 / 12

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

A concrete slab

A suppression pool

An elliptical steel dome

A moisture separator

6 / 12

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

It condenses rapidly inside the pipes

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

It emits low energy gamma photons

It causes torsional strain along the Main Turbine Shaft

7 / 12

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

To store the spent fuel

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

To serve as the main steam system

To provide a heat sink

8 / 12

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

Main Steam Isolation Valves (MSIV)

Steam Dryer

Moisture Separators

Safety Relief Valves

9 / 12

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

Only Mark I

Mark II and Mark III

Mark I and Mark II

Only Mark III

10 / 12

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

1 to 2 minutes

30 to 45 seconds

10 to 15 seconds

3 to 5 seconds

11 / 12

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

To store the reactor's spent fuel

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

12 / 12

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

Steam Dryer

Emergency core cooling systems

Suppression chamber

Drywell

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