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 condenses rapidly inside the pipes

It emits low energy gamma photons

It causes torsional strain along the Main Turbine Shaft

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

2 / 12

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

Steam Dryer

Suppression chamber

Drywell

Emergency core cooling systems

3 / 12

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

To store the spent fuel

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

To serve as the main steam system

To provide a heat sink

4 / 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

5 / 12

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

Suppression pool, Torus, or containment

Main Turbine

Wetwell

Reactor vessel

6 / 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

7 / 12

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

MSIV

N-16

Steam Dryer

Safety Relief Valves

8 / 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

9 / 12

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

3 to 5 seconds

30 to 45 seconds

1 to 2 minutes

10 to 15 seconds

10 / 12

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

Mark I and Mark II

Mark II and Mark III

Only Mark III

Only Mark I

11 / 12

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

To support the floor slabs of the reactor building

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

To condense steam from the reactor

To prevent fission products from escaping

12 / 12

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

An elliptical steel dome

A concrete slab

A moisture separator

A suppression pool

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