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?

<p>0,3 (B)</p> Signup and view all the answers

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

<p>Fe (C)</p> Signup and view all the answers

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

<p>Cl (C)</p> Signup and view all the answers

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

<p>Evaporating cleansing (B)</p> Signup and view all the answers

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

<p>To promote scaling removal (A)</p> Signup and view all the answers

What is a corrective water treatment mentioned in the text?

<p>Using hydrazine to suppress oxygen (D)</p> Signup and view all the answers

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

<p>Poor quality of feed water (B)</p> Signup and view all the answers

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

<p>Trilon B (B)</p> Signup and view all the answers

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

<p>Na3PO4 (A)</p> Signup and view all the answers

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

<p>Sodium, iron, copper, chlorines, and oxygen (C)</p> Signup and view all the answers

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

<p>Preventing intense erosion and corrosion wear of elements (C)</p> Signup and view all the answers

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

<p>Additional water; Leakages of air and cooling water into condenser; Corrosion products removal (B)</p> Signup and view all the answers

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

<p>General and Local (A)</p> Signup and view all the answers

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

<p>To make WCR implementation easier by using only stainless alloys (C)</p> Signup and view all the answers

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

<p>Low velocities (&lt; 0.5 m/s) of the flow due to gas bubble formation (B)</p> Signup and view all the answers

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