FEATURES:
APPLICATION:
|
 Figure 1: Model # SSS-33-5FT |
DESCRIPTION: Model SSS-335FT is
a two detector water monitor /controller for simultaneous measuring
of alpha, beta and gamma-emitting radio nuclides. The electronics
are microprocessor with color LCD display. The pre-amps are plug in
modules allowing change or addition of functions at a later date,
and allow rapid repair by module replacement in the field. The modular
system is covered by TA's unique exchange warranty system in addition
to the full one year warranty.
Shields are void free lead encased in welded Stainless Steel
for long useful life and easy decontamination. The alpha, beta flow
cell is easily changed via disconnect fittings. Gamma Spec shield
can be opened for cleaning with minimum effort. All connections are
sealed against leaks. The standard water moving system is based on
a dual pump-head high precision pump. It has a 10 liter per minute
capacity.
A wide range of pump capacities are available to meet users
specific needs. The entire system is mounted in a wheeled, self-contained
rugged cabinet. The SSS-33-5FT comes complete with all cabling tubing
and connectors in place and is ready to operate. 115 Volt 60Hz is
standard; 220 Volt 50/60 Hz is optional.
The alpha, beta detector in this system
consists of a light-tight detector assembly which interfaces with
the sample via quick disconnect coax cables and medical grade hoses
(stainless steel tubing is optional). The sample is passed through
a deionizer, filter and then goes to the detector assembly where it
is viewed by a matched pair of 2'' diameter photo-multiplier tubes.
The alpha, beta pulse analysis portion of
this system conditions and analyzes the output from the photo-multiplier
tubes by pulse height, duration and coincidence. Thereby permitting
the system to eliminate counting most background and noise counts.
Sensitivity is enhanced by the use of stochastic resonance plus high
gain, low noise PM tubes and pre-amps.
The water is measured for Gamma-emitter content,
typically in three energy windows. These are user settable.
For example they can be set for Na-22 (greater than 550 KeV), Be-7
(450 to 550 KeV) and low energy (below 450 KeV). To correct for overlap
and multiple peaks (e.g. Na-22) percentages of the high energy peak
can be subtracted from the mid and low energy peaks. Then a percentage
of the net mid-energy peak is also subtracted from the low energy
peak.
Data:-Analysis-Display-Hard-Copy-CD-ROM
Archive
In each data collection channel, the net counts are automatically
converted to concentration units, such as uCi/ml Bq/l or etc. (using
the detector efficiencies automatically measured and stored previously
by SSS-33-5FT semi-automatic self-calibration procedure).
The concentration and total activity released and
MDA levels are continuously calculated and recorded. This real time
information controls water flow and can trigger the alarms. Also,
all data is saved to the hard drive in spreadsheet format.
Historical data is easily displayed on-screen (and/or printed
out on the included graphics printer) in tabular or graphical format,
showing quantitative information as well as trends. Data is recorded
frequently so time-resolution is excellent.
CD-R drive, Ethernet card (with security) and floppy
disk drive make it easy to archive and further analyze data.
Veto Power: The discharge metering
pump in the SSS-33-5FT is automatically turned off, and discharge
immediately stopped, whenever pre-set limits are reached, or if any
fault occurs, or if moisture sensor in drip pan is activated.
All signals activate fail-safe relays. Relay contacts are
available to user.
Optional Aliquot: This option will periodically
collect and store a small water sample for independent analysis.
Optional UV Lamp: Used on inlet as algae-cide.
400 MHz COMPUTER INCLUDES:
400 MHz Processor, 30 Gig Hard Drive, 64 Meg Ram
15'' LCD Monitor, Keyboard, Mouse
CD-R Drive creates CDs and CD ROM Drive
10 Channel Data Acquisition Board, All Cables
Full Graphics Printer, color + B/W
Fast Modem, 56k, Ethernet for hook up to your LAN
Win XP, Specific Software for Beta and Gamma Counting.
Software is easily customized by user for special
needs.
| SPECIFICATIONS: | DETECTOR-1 | DETECTOR-2 |
|---|---|---|
| Detector | Flow cell | Gamma Spec |
| Radiation detected | ALPHA & BETA including Tritium | GAMMA |
| Materials monitored | Non-ionized liquids | particulate & dissolved metals & salts |
| Scintillator shape | ``bed of sand'' | 3'' x 3'' dia |
| Scintillation material | Anthracene | NaI(Tl) spectroscopic grade |
| MIN sensitivity | ||
| LDD in 100 sec. | 0.1 nanoCi/ml | 1 x 10-5uCi/ml |
| LDD in 24 hours | 15 picoCi/ml | 5 x 10-7uCi/ml |
| Dynamic range | 0 - 1,000 nCi/ml | 0-100nCi/ml |
| Shielding | ¼ `` lead | 2'' lead full 4 pi |
| More shielding is optional | 1'' 4 pi | 3'' lead full 4 pi |