Skip to main content

Currently Skimming:

B. SAMPLING PRACTICES AND SAMPLE PREPARATION FOR RADIOCHEMICAL ANALYSES
Pages 217-228

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 217...
... B.2 SAMPLING BWR PRIMARY COOLANT - LABORATORY FILTRATION B.2. 1 Sampling Method A large sample of reactor water is preferred for accurate chemical and/or radiochemical analysis.
From page 218...
... B.2.2 Laboratory Filtration Set up a filtration apparatus in a ra(liochemistry laboratory before the coolant sample is collected. An appropriate filtration apparatus includes a Millipore "hydrosal" 47-mm diameter stainless steel filter holder or equivalent, a 2-liter filtering suction flask and a vacuum pump.
From page 219...
... (5) Turn off the vacuum, remove the cation and anion exchange membranes from the holder and place each in a separate petri dish for activity measurement.
From page 220...
... B.2.4 Fur~er Chemical Separation 1 Among the radioactive nuclides collected by filtration, only a few a, ,D, and low-energy gamma emitting nuclides require further chemical separation before their activities can be measured. After the gamma spectrometric analysis is completed, the follow~ng procedures are commonly used in further separation: (1)
From page 221...
... IOACTIVITIES - IN-LINE FILTRATION (~) The water sample is collected by using a standard design of corrosion product sampler connected directly to the sample line.
From page 222...
... SAMPLING HOOD _ . BYPASS Ll N E ~ FLOW METER I I HIGH PRESSURE | | FILTER HOLDER Fl LTRATE FLOW METER _ I r ~ INTEGRAL I FLOW METER n Y ~ Figure B-1.
From page 223...
... . Unlike the high purity water in the BWR coolant, the PWR coolant chemistry is rather complex, and it presents a special environment for some radiochemical species which may easily change their solubilities and undergo certain interactions with the oxide film on the sample line when the coolant is cooled down and water pH is changed.
From page 224...
... The reactor coolant sample is collected at primary system pressure employing a sample cylinder at the primary coolant sampling sink.
From page 225...
... Primary Coolant Sample Manipulation Apparatus (Ref.
From page 226...
... (i) Aliquots of gas sample can now be taken through the surge volume septum cap en cl transferred to a calibrated sample vial for radio activity measurement.
From page 227...
... (2) Record the sample date, reactor power level, offgas monitor refilings, stack monitor readings, the offgas flow rate, and the offgas monitor flow rate.
From page 228...
... (9) If the sample vial is not properly evacuated, or the sample vial after filling is still under partial vacuum, the activity concentration in the final analysis shouic3 be corrected for the actual sample gas volume (at 760 mm)


This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More information on Chapter Skim is available.