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

FUN 2 EO: 1.4-k

1 / 12

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

Steam Dryer

Emergency core cooling systems

Suppression chamber

Drywell

2 / 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

3 / 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

MSIV

N-16

4 / 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

5 / 12

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

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

To store the reactor's spent fuel

To generate steam

To control torsional strain along the Main Turbine Shaft

6 / 12

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

Main Turbine

Wetwell

Suppression pool, Torus, or containment

Reactor vessel

7 / 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

8 / 12

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

10 to 15 seconds

30 to 45 seconds

3 to 5 seconds

1 to 2 minutes

9 / 12

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

To confine fission products

To rapidly condense directed steam

To support the drywell

To provide a heat sink

10 / 12

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

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

To provide a heat sink

To serve as the main steam system

To store the spent fuel

11 / 12

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

Mark II and Mark III

Mark I and Mark II

Only Mark I

Only Mark III

12 / 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

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