Rp_601

Approve ISA–RP60.1–1990 R E C O M M E N D E D P R A C T I C E ISA The Instrumentation, Systems, and Automation Society – TM d 5 October 1990 Control Center Facilities Copyright  1990 by the Instrument Society of America. All rights reserved. Printed in the United States of America. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), without the prior written permission of the publisher. ISA 67 Alexander Drive P.O. Box 12277 Research Triangle Park, North Carolina 27709 ISA–RP60.1–1990, Control Center Facilities ISBN 1-55617-282-6 Preface This preface is included for informational purposes and is not part of ISA-RP60.1-1990. This recommended practice has been prepared as part of the service of the ISA toward a goal of uniformity in the field of instrumentation. To be of real value, this document should not be static, but should be subject to periodic review. Toward this end, the Society welcomes all comments and criticisms, and asks that they be addressed to the Secretary, Standards and Practices Board, ISA, 67 Alexander Drive, P.O. Box 12277, Research Triangle Park, NC 27709, Telephone (919) 549-8411, e-mail: standards@isa.org. The ISA Standards and Practices Department is aware of the growing need for attention to the metric system of units in general, and the International System of Units (SI) in particular, in the preparation of instrumentation standards. The Department is further aware of the benefits to U.S.A. users of ISA standards of incorporating suitable references to the SI (and the metric system) in their business and professional dealings with other countries. Toward this end, this Department will endeavor to introduce SI-acceptable metric units in all new and revised standards to the greatest extent possible. The Metric Practice Guide, which has been published by the Institute of Electrical and Electronics Engineers as ANSI/IEEE Std. 268-1982, and future revisions, will be the reference guide for definitions, symbols, abbreviations, and conversion factors. It is the policy of the ISA to encourage and welcome the participation of all concerned individuals and interests in the development of ISA standards. Participation in the ISA standards-making process by an individual in no way constitutes endorsement by the employers of the individual, of the ISA, or of any of the standards that ISA develops. The information contained in the preface and footnotes is included for information only and is not a part of the recommended practice. This recommended practice is one of a series that constitutes the control center standard ISA- S60. The individual sections provide continuity of presentation, convenience of reference, and flexibility of revision. The complete standard consists of the following sections: SECTION TITLE SCOPE *dRP60.2 Control Center Design methods and terminology Design Guide and used in the specification of control Terminology center facilities RP60.3 Human Engineering Design concepts accommodating of Control Centers man’s physiological and psychological capabilities RP60.4 Documentation for Guide to the documentation Control Centers associated with control center specifications *dRP60.5 Control Center Guide to the use of available graphic Graphic Displays display techniques ISA-RP60.1-1990 3 RP60.6 Nameplates, Labels, Guide to the methods of identification and Tags for Control of control center equipment and parts Centers *dRP60.7 Control Center Guide to control center profiles, Construction fabrication and finish methods, and enclosure selection RP60.8 Electrical Guide for Design concepts for control center Control Centers electrical requirements RP60.9 Piping Guide for Design concepts for control center Control Centers piping requirements *dRP60.10 Control Center Guide to the methods of inspection Inspection and and testing prior to control center Testing acceptance *dRP60.11 Crating, Shipping, Guide to the available methods for and Handling for center crating, shipping, and handling Control Centers * Draft Recommended Practice — For additional information on the status of this document, contact ISA Headquarters. The persons listed below served as members of the ISA Control Centers Committee for the major share of its working period. NAME COMPANY R. W. Borut, Chairman The M. W. Kellogg Company G. F. Erk, Secretary Retired H. S. Hopkins, Managing Director Utility Products of Arizona W. W. Aird Aird Telcom Associates A. R. Alworth C. D. Armstrong Tennessee Valley Authority F. Aured Silent Watchman Corporation B. W. Ball The Foxboro Company S. Boyer ESSO Plaza West J. H. Cusak Moore Products Company F. L. Dufree Swanson Monitrol System J. M. Fertitta* The Foxboro Company C. Gording BIF Sanitrol/General Signal R. E. Hetzel Stauffer Chemical Company T. R. Holland Johnson Controls, Inc — Panel Unit A. A. Kayser Norden A. L. Kress 3M Company C. S. Lisser* *Chairman or Secretary Emeritus 4 ISA-RP60.1-1990 W. A. Maxwell Lower Colorado River Authority R. E. Munz Mundix Control Center, Inc. H. R. Solk* I. Stubbs M. J. Walsh The Foxboro Company S. J. Whitman American Chain & Cable (ACC), Bristol Division W. G. Williams W. T. Williams Lockwood Greene W. J. Wylupek Moore Products Company This recommended practice was approved for publication by the ISA Standards and Practices Board in October, 1990. NAME COMPANY D. N. Bishop Chevron USA, Inc. D. E. Rapley Rapley Engineering Services N. L. Conger Fisher Controls Int'l Inc. C. R. Gross Eagle Technology H. S. Hopkins Utility Products of Arizona R. B. Jones Dow Chemical Company (USA) A. P. McCauley, Jr. Chagrin Valley Controls, Inc. E. M. Nesvig ERDCO Engineering Corp. R. D. Prescott Moore Products Company R. H. Reimer Allen-Bradley Company J. Rennie Factory Mutual Research Corp. W. C. Weidman Gilbert/Commonwealth, Inc. J. R. Whetstone Nat'l Inst. of Standards & Technology M. A. Widmeyer The Supply System P. Bliss* Consultant W. Calder III* The Foxboro Company B. A. Christensen* Continental Oil Company L. N. Combs* Consultant R. L. Galley* Consultant T. J. Harrison* Florida State University R. T. Jones* Philadelphia Electric Company R. E. Keller* Consultant O. P. Lovett, Jr.* Consultant E. C. Magison* Honeywell, Inc. R. G. Marvin* Consultant W. B. Miller* Moore Products Company J. W. Mock* Bechtel Western Power Company G. Platt* Consultant J. R. Williams* Stearns Catalytic Corporation *Directors Emeritus ISA-RP60.1-1990 5 Contents 1 Introduction ....................................................................................................................... 9 1.1 Scope ...................................................................................................................... 9 1.2 Definition .................................................................................................................. 9 2 Site considerations ........................................................................................................... 9 2.1 Hazards ................................................................................................................... 9 2.2 Operability ............................................................................................................. 10 2.3 Clearances ............................................................................................................ 10 3 Construction .................................................................................................................... 10 3.1 Foundations and supports ..................................................................................... 10 3.2 Floors ..................................................................................................................... 12 3.3 Protective structures .............................................................................................. 13 3.4 Control center bases ............................................................................................. 15 4 Heating, ventilating, and air conditioning .................................................................... 15 4.1 General .................................................................................................................. 15 4.2 Mild climate locations ............................................................................................ 15 4.3 Severe climate locations ........................................................................................ 16 4.4 Locations classified for electrical installations ....................................................... 16 5 Services ........................................................................................................................... 17 5.1 Power .................................................................................................................... 17 5.2 Lighting .................................................................................................................. 17 5.3 Emergency lighting ................................................................................................ 17 5.4 Grounding .............................................................................................................. 17 5.5 Drains .................................................................................................................... 18 6 Personnel safety ............................................................................................................. 18 6.1 Fire ........................................................................................................................ 18 6.2 Radiation ............................................................................................................... 18 6.3 Toxic gases and flammable vapors ....................................................................... 18 6.4 Noise ..................................................................................................................... 18 7 Communications ............................................................................................................. 19 7.1 Wired ..................................................................................................................... 19 7.2 Radio ..................................................................................................................... 19 ISA-RP60.1-1990 7 1 Introduction 1.1 Scope This portion of ISA-RP60 is intended to be used as a guide in the preparation of engineering designs and specifications for control center facilities (see 1.2). Because of the wide variety of industries using control centers, it is necessary that this recommended practice be general in its coverage. References are made to applicable industry codes and standards and to national codes that are law under the Occupational Safety and Health Act (OSHA). The user is cautioned to consult local and state building and construction codes that may also apply and to comply with the latest revisions of all such codes and standards, particularly in the nuclear power plant industry. 1.2 Definition A control center facility is a combination of the services, protective enclosures, and environmental treatment necessary for the proper functioning of the control center. Control center facilities could be found in the following: a) An area within an enclosure that is constructed to protect a control center and its operating personnel. The enclosure might also contain a computer room, motor control center room, instrument/electric shop, laboratory, and personnel facilities such as toilets, lockers, and offices. b) An unenclosed area located either indoors or outdoors at ground level or in an elevated or subsurface structure. c) An area in a mobile unit. d) An area in a prefabricated or skid-mounted enclosure. 2 Site considerations 2.1 Hazards The following is a list of some hazards that should be considered in locating control center facilities: • Flammable, corrosive, or toxic liquids that could drain into or around the surrounding area • Fire exposure from operating units or storage areas • Entry of toxic and corrosive fumes or explosive dust into the control center facility • Entry of flammable vapors and gases (see American Petroleum Institute (API) RP500A, RP500B, or RP500C, as applicable, for the classification of areas for the installation of electrical equipment) • Entry of corrosive or toxic vapors and gases ISA-RP60.1-1990 9 • Noise • Radiation exposures or radioactive contamination • Electromagnetic interference (emi), radio frequency interference (rfi), magnetic interference (mi) • Vibrations (mechanical and seismic) • Falling debris, walls, and other obstructions • Pressure disturbances such as explosion blast waves, hurricane force winds, and tornadoes • Storms, floods, and wash water • Underground rivers, caverns, abandoned wells, and mining operations • Vehicular traffic • Lack of oxygen due to displacement by inert gases (e,g., Halon, nitrogen, and carbon dioxide) 2.2 Operability The location of a control center facility normally is dependent upon the amount of operator traffic required between the control center and the process equipment, dictated to a great extent by the type of process. For example, continuous or nonprocess units require less operator traffic than batch operations. Unattended operations may require special considerations. 2.3 Clearances Consideration should be given to providing sufficient clearance between the control center facility and adjacent structures to ensure access for fire fighting equipment, service vehicles, unloading, and for the proper operation and maintenance of equipment located within. The National Electric Code (National Fire Protection Association, NFPA: 70) specifies clearances required between and around equipment containing electrical devices and wiring. 3 Construction 3.1 Foundations and supports Foundations and footings required for support of control centers may include formed reinforced concrete, piling, masonry, and structural steel. Piling may be cast, poured, or timber type. 3.1.1 Soil tests Weight and load concentration data should be developed and any necessary soil tests should be made before proceeding with structural design. The nature and number of soil tests, method of sampling, and format of reports may be dictated by local inspecting authorities and/or by local testing laboratory experience. Where local authorities do not govern and the owner has no policy in this field, the following references are suggested: 10 ISA-RP60.1-1990 • Building Officials Conference of America, Inc. (BOCA), Basic Building Code Section 725.0 - Bearing Value of Soils Section 726.0 - Borings and Test Section 727.0 - Soil Test Procedure • Southern Standard Building Code Section 1302 - Footings and Foundations • Uniform Building Code Standards Standard 29-1 - Soils Classification Standard 29-2 - Expansion Index Text Standard 70-1 - Moisture/Density Relations of Soils Standard 70-2 - In-place Density of Soils 3.1.2 Load checks Foundations and footings normally present no extraordinary structural design problems. The design dead load should include weights of the actual building materials used, including partitions, and the weights of installed equipment (e.g., plumbing, heating, and air conditioning systems). Live loads include snow loading and loads due to the occupancy. Other loads to be considered are: a) seismic loads; b) soil lateral load, allowing for hydrostatic pressure; c) wind loading, walls and roof; d) impact loads, such as from elevators or vehicles; and e) installed dead loads (e.g., control centers, electrical switchgear, auxiliary power equipment, battery banks, tubing, cable, cable trays, and raceways). 3.1.3 Seismic considerations Refer to The National Building Code — Appendix J; the latest Uniform Building Code, Section 2312; and Section 10 of the Code of Federal Regulations (CFR), Part 50, for detail design parameters for earthquake-resistant construction and seismic zone maps of the United States. Also refer to Institute of Electrical and Electronic Engineers (IEEE) Standards 323 and 344. 3.1.4 Severity of weather Foundations should extend below the frost line depth except when the foundation is on bedrock, on pilings, or on other structures that penetrate the frost line. Areas of permafrost require special consideration. Frost lines may reach depths in excess of six feet. ISA-RP60.1-1990 11 3.2 Floors 3.2.1 Types 3.2.1.1 Slab A reinforced concrete slab is fireproof, resistant to shock, durable, strong, relatively inexpensive, and easy to maintain. Concrete slab floors are generally 5 to 6 inches (125 to 150 mm) thick when at grade. The loading strength is dependent upon slab thickness and type and spacing of reinforcing wire or rod. 3.2.1.2 Raised Raised floors are commonly known as computer floors, which consist of square sections supported at the corners by adjustable jacks or along the sides with angle frames. The sections are prefabricated plates that are usually surfaced with a tile material and are easily supported above a slab floor. This type of floor is often used where large quantities of wire and cable must interconnect several control centers within a facility with field terminals or other equipment. In addition, this type of floor allows for flexibility in rearranging floor-mounted equipment without a major impact. The space between the slab and removable plates can also be used effectively as an air conditioning distribution or return plenum. There may be special wiring restrictions when this space is so used. Raised floors are available to support various loads and should be sized carefully for present and future expected loads. A means of distributing concentrated loads should be used when moving control centers and other equipment into place. Loads exceeding reasonable limits should be set directly on the slab floor. See precautions listed in 3.2.1.4 for trenches. 3.2.1.3 Plate Carbon steel floor plate or grating set on structural members is generally used to support control centers located in open structures above grade. Corrosion and safety considerations may dictate special surface finishes for this type of floor. 3.2.1.4 Trenched One method for bottom entry of cable and tubing is the trenched floor. This normally consists of formed recesses in a slab floor, the recesses located strategically under the control center sections. Access can be either from outside the facility or from an adjacent termination room. Design problems with this approach include providing sufficient trenching and adequate cover for future needs. When using trenched or raised floors, precautions should be taken to prevent the accumulation of flammable and toxic vapors and liquids in the recessed space and to prevent the entry of animal life. Appropriate combustible gas detectors, toxic gas detectors, and fire extinguishing and fire suppression systems (e.g., Halon) should be considered for trenched or raised floor installations. 3.2.1.5 Combination Design considerations may dictate a combination of the above types of floors where present and future needs for wiring indicate a limited area of raised floor combined with, for example, a slab floor. 12 ISA-RP60.1-1990 3.2.2 Floor surfaces A floor material is used to control static charges, dust, and moisture and to provide a non-slip, attractive appearance. Bare concrete floors in particular remain porous and tend to retain moisture and generate dust. 3.2.2.1 A good concrete sealer may provide an adequate, serviceable