KUALITAS AIR REAKTOR RISET DAN PENGENDALIANNYA - ANSN

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The Research Reactor Water Quality and its Control. SUMIJANTO , P2TKN. ○ What is the meaning of qualified water? – Qualified water is the water that fulfill ...
The Research Reactor Water Quality and its Control SUMIJANTO , P2TKN 

What is the meaning of qualified water? – Qualified water is the water that fulfill the meeting need 

RR meeting need is: – Should not accelerate the corrossion process – Should not initiate the scaling process – Should not initiate the radiation exposure

Physical and chemical of water (1)

Physical and chemical of water (2)

Water quality parameter (1) 1. Conductivity ( λ )  unit µS/.cm (µmho/cm)  demineralized water λ = 0,056 µS/.cm  water contain impurity λ = high  λ = number if ion in the water 2. TOTAL DISSOLVED SOLIDS (TDS)  unit mg/liter (ppm)  number of dissolved organic and inorganic compound in water

Water Quality Parameter (2) 3. pH  pH = – Log [H+]  pOH = – Log [OH-]  pH + pOH = 14  Neutral water pH = 7 4. HARDNESS  Ca2+ and Mg2+ content in the water that can be exist as Ca/Mg : carbonate, bicarbonate, sulphate, chloride.  Temporary hardness Ca[HCO3]2, Mg[HCO3]2 CaCO3, MgCO3 can be erased by boiling  Permanent hardness Ca/Mg : sulphate and chloride

Water Quality Parameter (3) Scaling formation : Ksp CaCO3 = 4,9 10–9 = [Ca 2+][ CO3 2-] Ksp Mg(OH)2 = 5,6 10–12 = [Mg 2+][ OH -]2 5. Alkalinity Ions Content in the water : CO32- , HCO3- , OH– 2 HCO3- + heat → CO32- + CO2 + H2O CO32-+ H2O



2OH- + CO2

6. Specific parameter Fe , Mn , Cu , Zn , Ca , Mg , Na , SiO2(Si) , Cl- , SO4 2- , O2

PURIFIED WATER GRADES Unit

Grade 1

Grade 2

Grade 3

Grade 4

Conductivity, μS/cm Resistivity,MΩ/cm at 250C Total suspended solids, ppm   Organic solutes oxygen absorbed, ppm pH range Bacterial count, colonies per 100 ml Silica SiO2, ppm   Trace dissolved metals, ppm Colloidal matter   Carbon dioxide CO2 , ppm

0.1-0.055 10 – 20 At limit of detection At limit of detection 6.5 – 5 Nil   < 0.005   < 0.005 At limit of detection At limit of detection

0.1-0.055 10 – 20 < 0.05   < 0.1   6.5 – 7 Nil   < 0.005   < 0.005 As feedwater   At limit of detection

2–1 0.5 – 1 < 0.05   < 0.1   5.8 – 8.5 N/A   < 0.05   < 0.05 As feedwater 1.0

5–2 0.2 – 0.5 < 0.05   < 0.1   4 – 8.5 N/A   As feedwater < 0.05 As feedwater As feedwater

Conductivity, pH, Si, TOD*

Conductivity pH, Si,  

Conductiviy pH, Si,  

ConductiviypH, Si,  

Quality assessment by

Grade 1 : Chemically and biologilly pure water. Grade 2 : Chemically pure water with trace organic. Grade 3 : Purified water with trace dissolved solids and gases Grade 4 : Purified water with trace dissolved solids Si and CO2 as feedwater TOD* Total oxygen demand Air pendingin primer reaktor riset identik dengan Grade 2.

Indonesia and EWA/MARIA Primary cooling water qualification   No.

  Parameter

Reaktor Riset Kartini

Triga 2000

RSG GAS

Ewa/Maria

1.

pH

5.5 – 6.5

5.5 - 6.5

5.8 – 7.0

5.5 – 6.5

2.

λ (µS/cm)

< 3.5

< 3.5

< 8.0

0.2 – 1.5

3.

TDS (ppm)

-

-

-

1–3

4.

Ca (ppm)