Status Paper for Cape.net: Development of Operating Procedures

Abstract

Introduction Operating procedures include instructions and task descriptions for controlroom operators, field operators, maintenance workers and production engineers of plants in the process industries. The term operator includes all these categories in this paper. Operating procedures may be categorised as follows: Startup Normal operation, including on-line optimisation, abnormal situation handling and product type and load changes Planned shutdown Emergency shutdown Emergency and safety systems are covered in another status paper in this Technology working group, we focus on procedures for start-up, normal operation and planned shutdowns. In the process control system, various layers of the automation hierarchy can be distinguished, refer also Cape.Net status paper on Combined continuous and discrete dynamics (Engell 1998). safety related control functions basic control functions or regulatory control advanced control functions or supervisory control logistic control functions or plant optimisation Operating procedures may also be categorised according to frequency and criticality. For some frequently occurring low-risk tasks there may not exist any (written) operating procedure at all, the production management depends on the basic training and knowledge of the operators. For less common or medium-criticality tasks simpler procedures like written checklist should be used whereas more detailed instructions is recommended for critical tasks. Two main problems with development of operating procedures are discussed in this scope paper, how to ensure that operating procedures are complete and correct, and how to ensure that operators follow the operating proccedures as intended. Finally some IT-tools and future trends are described. Our main focus is the process industry and not nuclear and power plants. However, much of the work done on development of operating procedures is related to safety systems on nuclear power plants. A literature search operating procedures showed that more than 70% of the literature sited is categorised as nuclear or power generation rather than process industry or chemical industry. This fact is somewhat reflected in both the text and the list of references, but we have tried to exclude points and results that are not relevant for (normal) operation of (chemical) process plants. 2. Complete and correct operating procedures Plant and process knowledge A basic requirement for writing operating proceures is a very good knowledge of both the process, e.g. synthesis gas production, and the plant in question, e.g. Hydro's ammonia plant NII in Porsgrunn. Probably, both enginneering staff, equipment vendors and plant operators should be involved in the development of operating procedures to get the …

Cite this paper

@inproceedings{MathisenStatusPF, title={Status Paper for Cape.net: Development of Operating Procedures}, author={Knut Wiig Mathisen} }