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Water Chemistry Regulations Quiz

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Questions and Answers

Why is high pH recommended for feed water?

To promote local corrosion

To increase the concentration of impurities

To decrease the concentration of oxygen

To limit general corrosion (correct)

What is the purpose of continuous blowdown in a power unit?

To increase the concentration of contaminants in the system

To remove contaminated feed water from salt-sections (correct)

To promote scaling in the condenser

To remove solid impurities

What does the periodic blowdown target for removal in a power unit?

Solid impurities (correct)

Organic compounds

Contaminated feed water

Oxygen content

Which parameter is used to quantify the specific electric conductivity of H+ sample in µS/cm?

0,3 Signup and view all the answers

What element has a concentration of 15 µg/kg in the feed water?

Fe Signup and view all the answers

Which impurity has a concentration of 50 µg/kg in the blowdown water?

Cl Signup and view all the answers

What is one of the possible solutions for water cleansing mentioned in the text?

Evaporating cleansing Signup and view all the answers

What is the purpose of adding Na3PO4 in the context of water treatment?

To promote scaling removal Signup and view all the answers

What is a corrective water treatment mentioned in the text?

Using hydrazine to suppress oxygen Signup and view all the answers

What is the potential consequence of having a cleansing period shorter than 1 year?

Poor quality of feed water Signup and view all the answers

What additive is mentioned as helping to prevent iron oxides deposition on heat exchange surfaces?

Trilon B Signup and view all the answers

Which substance is used to form non-adhesive slag during water cleansing?

Na3PO4 Signup and view all the answers

What are the main impurities found in water that need to be regulated in a nuclear power plant?

Sodium, iron, copper, chlorines, and oxygen Signup and view all the answers

What is one of the purposes of Water Chemical Regime (WCR) in a nuclear power plant?

Preventing intense erosion and corrosion wear of elements Signup and view all the answers

What are the main sources of impurities introduced into the feed water in a nuclear power plant?

Additional water; Leakages of air and cooling water into condenser; Corrosion products removal Signup and view all the answers

What are the two major types of corrosion that could occur in a nuclear power plant?

General and Local Signup and view all the answers

Why were materials like carbonaceous steels, brass, and copper excluded from Water Chemical Regime (WCR) usage?

To make WCR implementation easier by using only stainless alloys Signup and view all the answers

What promotes pit corrosion in a nuclear power plant's system according to the text?

Low velocities (< 0.5 m/s) of the flow due to gas bubble formation Signup and view all the answers