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

FUN 2 EO: 1.4-k

1 / 12

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

MSIV

Steam Dryer

Safety Relief Valves

N-16

2 / 12

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

To support the drywell

To provide a heat sink

To confine fission products

To rapidly condense directed steam

3 / 12

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

To serve as the main steam system

To store the spent fuel

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

To provide a heat sink

4 / 12

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

Reactor vessel

Suppression pool, Torus, or containment

Main Turbine

Wetwell

5 / 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 III

Only Mark I

6 / 12

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

Moisture Separators

Main Steam Isolation Valves (MSIV)

Safety Relief Valves

Steam Dryer

7 / 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 prevent fission products from escaping

To support the floor slabs of the reactor building

8 / 12

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

Emergency core cooling systems

Drywell

Suppression chamber

Steam Dryer

9 / 12

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

A moisture separator

A suppression pool

A concrete slab

An elliptical steel dome

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

To store the reactor's spent fuel

11 / 12

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

1 to 2 minutes

30 to 45 seconds

10 to 15 seconds

3 to 5 seconds

12 / 12

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

It emits low energy gamma photons

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

It condenses rapidly inside the pipes

It causes torsional strain along the Main Turbine Shaft

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