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?

Drywell

Emergency core cooling systems

Suppression chamber

Steam Dryer

2 / 12

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

To provide a heat sink

To store the spent fuel

To serve as the main steam system

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

3 / 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

4 / 12

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

Main Turbine

Suppression pool, Torus, or containment

Reactor vessel

Wetwell

5 / 12

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

Only Mark III

Mark II and Mark III

Only Mark I

Mark I and Mark II

6 / 12

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

30 to 45 seconds

10 to 15 seconds

1 to 2 minutes

3 to 5 seconds

7 / 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 support the drywell

To confine fission products

8 / 12

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

A moisture separator

A suppression pool

An elliptical steel dome

A concrete slab

9 / 12

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

Moisture Separators

Main Steam Isolation Valves (MSIV)

Steam Dryer

Safety Relief Valves

10 / 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 causes torsional strain along the Main Turbine Shaft

It emits low energy gamma photons

It condenses rapidly inside the pipes

11 / 12

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

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

To prevent fission products from escaping

12 / 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 control torsional strain along the Main Turbine Shaft

To store the reactor's spent fuel

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