The information contained in this document is …

1 Copy Enclosure tech Tel: +44 (0)131 668 8411 Fax: +44 (0)131 668 8412 Email: The information contained in this document is strictly confidential and is intended for the addressee only. The unauthorised use, disclosure, copying, alteration or distribution of this document is strictly prohibited and may be unlawful. Doc Number: VIS-SPE-ATC-10000-0009 Date: 28 April 2003 Issue: Page: 2 of 76 Author: Bryan Little copy Enclosure tech Change Record Issue Date Section(s) Affected Description of Change/Change Request Reference/Remarks 1 14/08/02 All First issue for ESO Compliance Review 2 06/09/02 All Second issue for Invitation to Tender 3 25/03/03 All Third issue for Contract includes clarification from pre and post tender periods 4 28/04/03 Several Fourth issue to incorporate minor changes as agreed and initialled on Contract Version Doc Number: VIS-SPE-ATC-10000-0009 Date: 28 April 2003 Issue: Page: 3 of 76 Author.

2 Bryan Little copy Enclosure tech Table of Contents 1 SCOPE OF document .. 7 7 ENCLOSURE 7 7 2 ACRONYMS AND ABBREVIATIONS .. 9 3 APPLICABLE AND REFERENCED DOCUMENTS .. 10 4 THE VISTA GENERAL CONCEPT ..15 5 VISTA ENCLOSURE AND AUXILIARY BUILDINGS REQUIREMENTS .. 16 FUNCTIONAL 16 19 ESO Paranal 19 Installations Interface .. 19 Telescope .. 20 Coating 20 Handling .. 20 Contractor s Installation and 20 ARCHITECTURAL 20 6 22 LOAD COMBINATIONS AND ALLOWABLE 22 ENVIRONMENTAL 22 General .. 22 22 Natural Temperature .. 22 Humidity .. 22 Sand and 23 Elevation above Sea Level .. 23 Exposure to Ultra-Violet Radiation ..23 Earthquakes .. 23 OPERATIONAL 23 Vibration and Noise .. 24 LOADS 24 DUTY 24 7 CO-ORDINATE SYSTEMS, REFERENCE LEVELS, VOLUMES AND DIMENSIONS.

3 25 CO-ORDINATE SYSTEMS AND REFERENCE 25 VOLUME INSIDE THE 25 25 8 THE CONCRETE STRUCTURES ..25 CONCRETE STRUCTURES 26 Geotechnical Testing (Not a deliverable of this Contract) .. 26 Enclosure Base .. 27 Telescope Pier 28 Auxiliary Building Structure Requirements .. 29 Excavations, Foundations and Civil Works 29 Excavations, Foundations and Civil Works .. 30 Doc Number: VIS-SPE-ATC-10000-0009 Date: 28 April 2003 Issue: Page: 4 of 76 Author: Bryan Little copy Enclosure tech 9 THE STEEL 36 General Requirements .. 36 Standards and 36 Loads on the Steel 36 Earthquake Damage Connection of the Enclosure to the Concrete Base Structure .. 37 Limitation of Deflections .. 37 Steel 37 Connections .. 38 Circular Rail.

4 38 Corrosion Protection .. 38 CLADDING, WALLS AND 38 Specifications and Requirements .. 39 FLOOR 40 General .. 40 Azimuth Floor & Intermediate 40 Hatch 40 Guard rails .. 41 41 Ladders .. 41 10 41 OBSERVING SLIT AND VENTILATION 41 General 41 Observing Slit Ventilation Openings 43 44 General 44 Windscreen Requirements ..44 ROTATION 44 General 44 Rotation Mechanism 45 11 AUXILIARY EQUIPMENT .. 46 46 General Requirements for Dome 47 Standards and 47 Dome Crane Requirements .. 47 FLAT 48 MOON 48 THERMAL CONTROL 49 General 49 Design 49 Air Handling for the 50 Heat 50 Cooling System (Chilled Water).. 51 Cooling Liquid Production ..51 Air Conditioning System .. 52 Cleanliness .. 52 Measurement 52 Thermal Loads on Cooling System .. 53 Cooling Liquid Temperature and Pressure Requirement.

5 53 Cooling System Implementation Requirements .. 54 Control System .. 54 Seals .. 54 Doc Number: VIS-SPE-ATC-10000-0009 Date: 28 April 2003 Issue: Page: 5 of 76 Author: Bryan Little copy Enclosure tech Cooling of Auxiliary Building ..55 12 ELECTRICAL 55 GENERAL ELECTRICAL 55 ELECTRIC POWER 56 57 57 57 EMERGENCY 57 CONTROL SIGNALS, COMMANDS AND 58 FIRE ALARM 58 13 CONTROL SYSTEM .. 58 58 CONTROL 59 CONTROL 59 60 GENERAL 60 61 61 62 DOME Fine and Coarse Modes ..63 Position and Velocity Overspeed Limits .. 63 Fine Position Mode .. 63 Coarse Position 64 Manual Controls .. 64 Functions .. 64 RADIO 65 14 PLANT 65 COMPRESSED AIR 65 HELIUM 65 CHEMICAL WASHING 65 WATER 66 15 RELIABILITY MAINTAINABILITY AND SAFETY REQUIREMENTS.

6 66 ENCLOSURE AND AUXILIARY BUILDINGS 66 SYSTEM 66 Overall 66 Time Available for Maintenance .. 66 Specific Reliability Requirements .. 66 MAINTAINABILITY GUIDELINES AND 67 Maintenance Approach ..67 16 SAFETY REQUIREMENTS .. 68 GENERAL SAFETY 68 ELECTRICAL 68 PNEUMATIC 68 COOLING SYSTEM 69 OPERATIONAL 69 EMERGENCY STOP SYSTEM (ESS).. 69 SAFETY 71 17 REQUIREMENTS FOR ANALYSES .. 71 Doc Number: VIS-SPE-ATC-10000-0009 Date: 28 April 2003 Issue: Page: 6 of 76 Author: Bryan Little copy Enclosure tech STRUCTURAL ANALYSES: 71 Gravity Load 72 Wind Stress Analysis .. 72 Seismic Analysis .. 72 Stress Verification Criteria and Limits .. 72 Load Combinations .. 73 18 ELECTROMAGNETIC COMPATIBILITY EMC.

7 73 73 ELECTROMAGNETIC ENVIRONMENT (PROTECTION AGAINST LIGHTNING, PROTECTION AGAINST LIGHTNING ELECTROMAGNETIC PULSE - LEMP, POWER QUALITY).. 74 75 75 Immunity .. 76 Doc Number: VIS-SPE-ATC-10000-0009 Date: 28 April 2003 Issue: Page: 7 of 76 Author: Bryan Little copy Enclosure tech 1 SCOPE OF document General This document defines the basic requirements and provides the technical specifications for the design, manufacture, pre-assembly, packing, transport, erection on-site and testing and commissioning of the VISTA (Visible and Infrared Survey Telescope for Astronomy) telescope enclosure building and auxiliary building. VISTA is a 4m diameter class survey telescope which is being designed to perform pre-planned, ground-based astronomy surveys of the Southern sky.

8 The telescope will be installed on the location of ESO s Cerro Paranal Observatory, in the desert of Atacama, in the North of Chile. Specifications have been derived from the VISTA conceptual design. As the detailed design progresses, some requirements may need modification. Enclosure Concept An Enclosure conceptual design was developed during Phase 'A of the VISTA project. The principal objective of this work was to provide the basis for cost estimates and project planning to facilitate a judgement on the feasibility of meeting the scientific objectives within the financial and time constraints. The conceptual design work has also been used for the preliminary definition of space envelopes and interfaces between the various work packages. Subject to meeting the requirements of this Specification, the Contractor can develop their own solutions to suit their experience and capabilities.

9 Note: Conceptual design descriptions and drawings are included for information only. It should be noted that it is a proof of concept design. Use of the conceptual design will not remove the responsibility of the Contractor to meet the requirements. Description of the concept is identified by italic text. The volume given in the Enclosure conceptual design is deemed to be valid as the baseline for this specification. Should the volume be violated by the telescope upper structure design then an amendment will be required. Definitions Enclosure Buildings Work Package (EBWP) The complete deliverable object of this Technical Specification and SOW for the Enclosure Building and Auxiliary Building. It includes any design, design development, manufacture, assembly, test, packaging, transport, erection, commissioning, test and all supporting documentation.

10 Doc Number: VIS-SPE-ATC-10000-0009 Date: 28 April 2003 Issue: Page: 8 of 76 Author: Bryan Little copy Enclosure tech Enclosure The Enclosure Building. Enclosure base The concrete structure that is the support base for the rotating part of the Enclosure. Dome Enclosure rotating part. Auxiliary Building The adjoining building to the Enclosure that houses plant and support services for both the Telescope and the Enclosure. Site Preparation The work to construct the Telescope Platform, Access Road and Services Trench (not part of this Contract).