ML19224B369
| ML19224B369 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 06/14/1977 |
| From: | Metropolitan Edison Co |
| To: | Mullinix W NRC/IE |
| References | |
| 1758, TM-0135, TM-135, NUDOCS 7906150013 | |
| Download: ML19224B369 (9) | |
Text
/r TMI DOCUMENTS
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DOCUMENT NO:
COPY MADE ON OF DOCUMENT PROVIDED BY j
i METROPOLITAN EDISON COMPANY.
Wilda R. Mullinix, NRC
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7906150013.
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201 171
' g' Revision 1
06/14/77 fh THREE MILE ISLAND NUCLE AR STATION g\\V G.
STATION HEALTH PHYSICS PROCEDURE NO. 1758 OPERATION AND CALIBRATION OF PORTABLE AIR SAMPLERS Table of Effective Pages Page Date Revision Page Date Revision g
Date R evision v
1.0 06/14/77 1
26.0 51.0 2.0 06/14/77 1
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Approval 2
Cognizant Dept. Head Cognizant Dept. Head Unit 1 PORC Recom
>nd Approval Unit 2 PORC f ommfnds proval
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Date
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Date Chai m n of P R Chairmin fPDF C PORC comm"nts of f included PORC comment, of included (da 'e)
(d te)
By Date 8y_
d if 1 Date s
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t Approval f Statia'n Superintenden ' /' /
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I Unit Superintendent N 5 6'^
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1758 Revision 1 06/14/77 THREE MILE ISLAND NUCLEAR STATION STATION HEALTH PHYSICS PROCEDURE NO. 1758 OPERATION AND CALIBRATION OF PORTABLE AIR SAMPLERS 1.0 PURPOSE The purpose of this procedure is to describe the method of operation and calibration of the Staplex and Richmond Laboratories, Inc.
(RLI) cart mounted air samplers.
2.0 DISCUSSION Air sampling is performed to determine concentrations of radicactive particulates and radioactive gases (radioactive iodine) in areas where maintenance work or other activities may involve inhalation of radioactivity.
Particulate samples are collected on G5 filters and radiciodine samples on charcoal cartridges.
Quick determinations are made with high volume air samplers.
Samples from low volume air samplers are more representative of inhalation doses for man.
The cart-mounted air samplers are designed for continuous operation while personnel are in a contaminated area.
3.0 REFERENCES
Unico Environmental Instrument Manual i
Richmond Laboratories, Inc.
4.0 EQUIPMENT Stamplex RL1 Cart Mounted G-5 Filter or Charcoal Cartridge Stop Watch
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1758 Revision 1 06/14/77 5.0 OPERATING INSTRUCTIONS 5.1 Install proper filter according to the type of sample to be collected (GS-filter for particulate collection and charcoal cartridges for radiciodine).
NOTE:
For RLI Cart mounted air samplers only, not for Staplex Air Samplers.
5.2 Place air sampler in the area or room where potential airborne radioactivity exists.
5.3 Collect sample according to HPP 1605 for radioactive particulates and HPP 1606 for radioactive iodine.
5.4 Operation of RLI Cart-Mounted Air Samplers.
5.4.1 Position pump in a location where air is to be sampled.
5.4.2 Check to see that the starting switch if "off" and plug cord into a 100-115V AC source.
5.4.3 Remove cap on filter holder and place clean filter paper in holder and replace cap.
I 5.4.4 Reset running time meter to zero.
5.4.5 Check to see that both orifice taps are plugged.
5.4.6 Turn on starting switch to begin sampling period and record on data sheet the time, location and date sampler was started.
5.4.7 At end of desired sampling period, turn power switch off, record time, date and total hours sampler was operated.
6.4.8 Remove filter cap and place filter in container identified with information on data sheet.
5.4.9 Record total volume of air sampled where:
Volume: = (flowrate of pump) (Time sampler operated)
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Cu ft.
= (Cu. ft/ min) (minutes)
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2.0
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1758 Revision 1 06/14/77 5.4.10 To continue sampling, repeat starting at 5.4.4 above.
6.0 CALIBRATION OF AIR SAMILES 6.1 Calibration of air flow rate using magnehelic gauge and critical orifice for the cart mounted air samplers.
6.1.1 Zero the magnehelic gauge in the position it is to be used before starting.
6.1.2 Remove plugs from both orifice taps and attach the rubber hose to the "high" and " low" taps.
(The "high pressure" tap is the one closest to the filter holder and is identified on the rear of the gauge).
Reversal of positirn will cause Delow zero readings when pump is "on".
6.1.3 Place a fresh filter paper in the filter holder and turn the pump on.
6.1.4 The flowrate in inches can be read directly from the gauge.
6.1.5 Affix the measured flowrate to the pump, initial and date.
6.1.6 Turn pump "off" and remove the hose from orifice taps.
6.1.7 PLACE ORIFICE PLUGS BACK IN TAPS.
6.1.8 Pump is now rt.ady for routine operation.
NOTE 1:
l Accuracy: The 3/16" diameter orifice was calibrated by use of a bellows-type total flow gas meter.
The scale was drawn on the gauge to correspond to the average flow rate observed at 12" water pressure drop (approximately midscale) ar.d should be within + 10% considering normal pulsations.
The pressure taps
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of the systems (rear of th ' Mahnehelic Gauge) are purposely h
restricted with fiber to das: pen line pulsations.
The amount of restriction may, however, be varied in order to change 3.0 201 175
1758 Revision 1 06/14/?7 needle vibration <nd response time of the gauge.
The user may wish to do this.
~ NOTE 2:
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Long Storage Periods of Hall and Gossett Pumps The cylinder walls of the pump are n.cde from mild steel and are subject to corrosion during long periods of inactive storage in humid atmospheres.
The graphite piston rings preclude the use of oil to protect these surfaces without damage to these seals.
Should difficulty be experienced in starting the pump, it is probably a result of the high frictional contact between the rings and the cylinder walls.
In such cases remove the fan guard (two screws) and the "C" clamp holding the fan. Next, turn the shaft several revolutions by hand and try to start the pump.
D0 NOT USE OIL.
Repeat this operation until the pump starts and allow it to run several minutes to smooth cut (and remove) rusted surfaces.
- Finally, I
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stop tha pump and test to see that it will operate easily on t
restarting.
Replace the fan and the fan guard.
6.2 The Staplex Flowrator Calibration i
6.2.1 The flowrator was specifically designed to be used with the Staplex high volume air sampler.
It consists of a uniform aluminum tube, a two position orifice, pressure sensing taps and associated tubing for connections to an inclined manometer.
The two orifices, selected by a lever on top of the large aluminum body, will permit the measurement of flow when the Staplex is used with filter paper, when a charcoal cartridge might be present or with an annular impactor sampling unit.
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1758 Revision 1 06/14/77 6.2.2 With the lever in the " closed" position the orifices offers greater restriction and low flow rates can be measured: with the level in the "open" position high flow rates can be measured.
A set of flow rate curves for the two orifice positions are provided Figures 1758-4 and Figure 1758-5 as a result of slight variations in the assembly of these units, eacn individual flowrator har been calibrated.
Once calibrated, the response of the flowrator will remain relatively constant and can serve to detest changes in the air flow from the Staplex unit as its efficiency may vary with use.
6.3 Operation 6.3.1 Level and zero the inclined manometer as necessary.
6.3.2 Select the "open" position for large flows:
The " closed" position for lower flows.
In most cases it will be in the
" closed" position.
6.2.3 Place the Staplex with filter paper in place, as in normal z
use, against the flowrator and tape joint.
l 6.3.4 Make sure good seal has been made.
Read the differential pressure and obtain reading from either 1758-4 or 1758-5.
6.3.5 Calibration should be performed consistant with Staplex usage.
Mark the flow rate on each Staplex unit.
Rely on this value rather than value obtained on the gauge on the Staplex.
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