Control Loop Tuning and Surge Response for Hanford WTP Melter Offgas Systems

Smith, F. G., III

Savannah River Site (S.C.)

关键词: Low-Level Radioactive Wastes;    Flowsheets;    Surges;    Off-Gas Systems;    Mathematical Models;   

DOI  :  10.2172/825249
RP-ID  :  WSRC-TR-2003-00434, Rev. 0 SRT-RPP-2003-00206
RP-ID  :  AC09-96SR18500
RP-ID  :  825249

美国|英语

来源: UNT Digital Library

【 摘 要 】

This report describes control loop tuning in models of the high level waste (HLW) melter offgas system, the low activity waste (LAW) melter offgas system and the HLW Pulse Jet Ventilation system and an assessment of the response to steam surges in both melter offgas systems. The three offgas systems were modeled using the Aspen Custom Modeler (ACM) software. The ACM models have been recently updated. Flowsheets of the system models used in this study are provided in Appendix D. To facilitate testing, these flowsheets represent somewhat simplified versions of the full models. For example, the HLW and LAW vessel ventilation systems have been represented as fixed air sources that provide a constant gas flow and specified air surges. Similarly, the six tanks and individual pulse-jet air sources in the HLW Pulse Jet Ventilation system are represented as a constant air source for control loop tuning purposes. The second LAW melter system has also been represented as a constant flow air source and several other simplifications such as removing HLW and LAW control interlocks, submerged bed scrubber bypass lines, and pressure relief valves have been made.