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

FUN 2 EO: 1.4-k

1 / 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

2 / 12

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

N-16

MSIV

Safety Relief Valves

Steam Dryer

3 / 12

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

Steam Dryer

Emergency core cooling systems

Suppression chamber

Drywell

4 / 12

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

Safety Relief Valves

Moisture Separators

Main Steam Isolation Valves (MSIV)

Steam Dryer

5 / 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

6 / 12

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

3 to 5 seconds

1 to 2 minutes

30 to 45 seconds

10 to 15 seconds

7 / 12

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

To condense steam from the reactor

To support the floor slabs of the reactor building

To prevent fission products from escaping

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

8 / 12

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

Only Mark III

Mark I and Mark II

Only Mark I

Mark II and Mark III

9 / 12

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

To store the spent fuel

To provide a heat sink

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

To serve as the main steam system

10 / 12

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

To generate steam

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

To store the reactor's spent fuel

To control torsional strain along the Main Turbine Shaft

11 / 12

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

Reactor vessel

Main Turbine

Wetwell

Suppression pool, Torus, or containment

12 / 12

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

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

It emits low energy gamma photons

It condenses rapidly inside the pipes

It causes torsional strain along the Main Turbine Shaft

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