MODEL KS-301-APT & F

 CONTINUOUS-OPERATION HIGH VOLUME FLOW RATE AEROSOL, AIRBORNE DUST AND IODINE SAMPLER, WITH THREE-STAGE FILTER, FOR ENVIRONMENT MONITORING OF NUCLEAR POWER STATIONS

CONTAINER-MOUNTED VERSION

KS-301-APT

1. Purpose

The type KS-301-APT high volume flow rate sampling instrument is suitable for continuous and long-term sampling of airborne dust, solid particles, aerosols and iodine. The three-layer filter – aerosol, PACI and TEDA - installed in the sampler facilitates practically total filtering of airborne aerosols, iodine and solid particles from approximately 1000 [m 3] air, daily. This high air quantity provides sufficiently enriched samples for high-accuracy analysis and activity concentration monitoring of the pollutants. By the intake structure and the volume flow rate meter a compact unit is constituted. For improvement of the measuring accuracy, a thermometer, detection probe and heated intake suction pipe are built-in. The entire sampling cycle can be displayed in scrolled manner on the LCD display and downloaded into a notebook, if required. The control electronics stores all measurement data, connectable to a monitoring network, and it is prepared for remote on-off switching. The hydrodynamic machine built into the sampler is a lateral-channel type, energy-saving pump of long lifetime, low noise emission and, low speed. The measuring method conform is in conformity with the EN ISO standard recommendation.

2. Technical description

The durable operation, type KS-301-APT high volume flow rate aerosol and iodine sampler shown in Figure 1. consists of the following main sub-units:

  • Intake structure integrated with the volume flow rate meter.

  • Sampling pipe with container bridging, connections and pipe supporting console.

  • Three-layer filter support housing, with heated intake suction pipe.

  • Lateral-channel pump integrated with motor, on base frame.

  • Exhaust conduit furnished with vibration damper and wall-bridging structure.

  • Measuring and control unit with connection cables and sensors.

The airborne solid particles from the external air space, flowing through a sample intake structure designed according to the EPA recommendations and provided with guiding poles reducing the influence of the wind force and wind direction changes, passing a short straight pipe section, Venturi volume flow rate meter and heated piping are seized by an aerosol filter of 196 [mm] diameter accommodated in the filter housing, whilst iodine is trapped by the PACI filter moreover a filter containing granulated active carbon layer.

SPECIAL FEATURES

  • Three-stage – aerosol, PACI, TADE – filter system.

  • High-accuracy, long-life-time Venturi volume flow rate meter.

  • The sampler does not contain moving parts, except for the drive motor.

  • Replaceable filter housing, with heated intake pipe.

  • The aspirated air quantity q = 25-80 [m 3 /h].

  • Microprocessor control, full-scale LCD display, monitoring connectable to a system.

  • Automatic or manual operation mode.

  • Keyword starting, data protection, automatic restart in case of power failures.

  • All measured and set data are stored in the measuring unit and the data can be processed by means of a PC.

  • Volume flow rate meter calibrated with use of OMH- (National Office of Measures) verified devices.

  • Lower than 56 [dBA] noise level.

    • The high-purity air is then passed through an extension pipe, lateral-channel pump and exhaust pipe, to the outer air space. The volume flow rate meter and evaluation unit – Figure 2. – processing the pressure signal of the Venturi meter, measures the quantity of the air flow rate [m3/h], and the total volume suctioned through during the sampling period in [m3], moreover the duration of the sampling. In case of power supply failures the measuring unit stores the measurement data. In Figure 3. the active carbon holder box used for seizing the radioactive fine particles is shown, in ready for charging state.

    3. Technical data
  • Maximum volume flow rate (KS-301-APT):
    		• qmax = 80 [m3/h]
  • Minimum volume flow rate with iodine filters:
    		• qN = 25 [m3/h]
  • Diameter and material of the solid particles filter (KS-301-APT):
    		• Æ 196 [mm] MN 85/90 fibreglass
  • Diameter and material of iodine filter I (KS-301-APT):
    		• Æ 196 [mm] PACI
  • Diameter and material of iodine filter II (KS-301-APT):
    		• Æ 155 [mm] 207B TEDA
  • Maximum volume flow rate (KS-301-F):
    		• qmax = 46 [m3/h]
  • Accuracy of volume flow rate
    		• ± 2 [%]
  • Data of the lateral-channel pump:
    		• 750 [W], 230/400 [V], 50 [Hz]
  • Heating:
    		• 280 [W]
  • Floor area:
    		• approx. 700*700 [mm]

    Figure 1.

    Figure 2.

    Figure 3.