Controls TSRs

HCF and process operators use the performance monitoring instrumentation and controls described above to maintain Zone 1 confinement boundary integrity. The functional performance of this equipment is assured by means of administratively controlled TSR surveillance activities. SCB-to-Zone 2A differential pressure instrumentation is subject to periodic channel functional testing and calibration, and the ventilation system fan sequencing interlock is periodically tested by HCF operations personnel in accordance with operating procedures. 

Charcoal filter operability is ensured by means of an administratively controlled TSR surveillance activity. This activity involves periodic monitoring of the filter differential pressure during ventilation system operation, in accordance with operating procedures. 

HEPA filter performance for the removal of radioactive particulate matter in the ventilation system hot exhaust is ensured by means of administratively controlled TSR surveillance activities. HEPA filters are subject to periodic pressure drop testing to verity operability (i.e., to verify that the filters are not plugged). They are also subject to periodic efficiency testing to verify the required level of particulate matter removal efficiency. HEPA filters are to be replaced, In accordance with operating procedures, when they become plugged or when the required efficiency can no longer be achieved. 

Such operating lines exist for all multi-port PFRs. There is no requirement that idealized conditions, such as adiabatic or isothermal, be present during reactor operation. Therefore the data from a TS-PFR need not be gathered under idealized operating conditions in order to construct valid operating lines from which rates can be calculated. This greatly simplifies the temperature control requirements in TSR operation and makes the TS-PFR relatively simple to build. 

The flows that must be metered depend on the size of the reactor, on the rate of reaction and the temperatures to be investigated. Since few flow controllers have a very wide range, this immediately leads to the conclusion that a versatile TSR must have readily replaceable flow controllers so that a variety of reactions can be studied using the same instrument. 

The reactor module will normally contain several controlled elements as well as several temperature measuring devices. All of these must be capable of communicating with the TSR software. The controlled elements should accept commands and report status to the TSR software. The temperature measuring devices will only report. 

The capture and subsequent formatting and processing of the analytical report is done under TSR software control. Displays of the results of the analysis and any other pertinent parameters and presentations is under TSR software control from there on. Real-time strip chart presentations and their recordings can be used to observe or review any anomalies that might take place during hours of unattended operation. 

Reactor pressure is maintained by a back-pressure controller operating well away from the harsh environment of the reactor module. The only requirement here is that the back pressure controller be capable of responding to set points sent from the multiplexer and of reporting the actual pressure maintained to the TSR software. 

The details of the required design features in the case of the various TSRs described above will be defined in due course on the basis of laboratory experience. The points raised in the above text are intended as a presentation of our current thinking regarding the issues that need to be considered in building an effective TSR. When commercial versions of TSRs are purchased, the user will be spared the need to understand the appropriate mathematics and the underlying theoretical issues. More invitingly, commercial TSRs will spare the user die need to write the programs used to control the operation of the equipment and to interpret the results. The TSR will be an instrument, like... 

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