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

FUN 2 EO: 1.4-k

1 / 12

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

It emits low energy gamma photons

It condenses rapidly inside the pipes

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

It causes torsional strain along the Main Turbine Shaft

2 / 12

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

3 to 5 seconds

1 to 2 minutes

10 to 15 seconds

30 to 45 seconds

3 / 12

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

A moisture separator

An elliptical steel dome

A suppression pool

A concrete slab

4 / 12

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

Drywell

Suppression chamber

Steam Dryer

Emergency core cooling systems

5 / 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

6 / 12

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

Main Steam Isolation Valves (MSIV)

Safety Relief Valves

Moisture Separators

Steam Dryer

7 / 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

8 / 12

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

Suppression pool, Torus, or containment

Wetwell

Reactor vessel

Main Turbine

9 / 12

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

N-16

MSIV

Steam Dryer

Safety Relief Valves

10 / 12

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

To confine fission products

To provide a heat sink

To rapidly condense directed steam

To support the drywell

11 / 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 store the reactor's spent fuel

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

12 / 12

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

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

To support the floor slabs of the reactor building

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