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

FUN 2 EO: 1.4-k

1 / 12

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

Wetwell

Suppression pool, Torus, or containment

Reactor vessel

Main Turbine

2 / 12

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

Safety Relief Valves

Steam Dryer

Moisture Separators

Main Steam Isolation Valves (MSIV)

3 / 12

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

To provide a heat sink

To rapidly condense directed steam

To confine fission products

To support the drywell

4 / 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

5 / 12

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

To store the reactor's spent fuel

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

To generate steam

To control torsional strain along the Main Turbine Shaft

6 / 12

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

A suppression pool

A concrete slab

An elliptical steel dome

A moisture separator

7 / 12

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

To store the spent fuel

To provide a heat sink

To serve as the main steam system

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

8 / 12

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

To support the floor slabs of the reactor building

To condense steam from the reactor

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

To prevent fission products from escaping

9 / 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

10 / 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

11 / 12

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

Steam Dryer

Emergency core cooling systems

Drywell

Suppression chamber

12 / 12

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

10 to 15 seconds

30 to 45 seconds

1 to 2 minutes

3 to 5 seconds

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