Requirements for Active Safety Systems of the General Infrastructure in Secondary Beam Areas

Transcription

1 CERN CH1211 Geneva 23 Switzerland EDMS NO. REV. VALIDITY DRAFT REFERENCE SBA FUNCTIONAL SPECIFICATION Requirements for Active Safety Systems of the General Infrastructure in Secondary Beam Areas Abstract Active safety systems of the general infrastructure cover the fire and gas detection, the alarm buttons (AUG, AUL, evacuation alarm) and the resulting actions of informing the fire brigade, siren sound, closing the gas supply and disconnecting electricity. For a single approach the concept of these active alarms for Secondary Beam Areas (East Area, AD, EHN1, EHN2, and ECN3) is commonly defined. DOCUMENT PREPARED BY: CHECKED BY: APPROVED BY: A. Fabich E. Gschwendtner Ilias Efthymiopoulos Lau Gatignon S. Grau EL (S. Infante, tbc) A. Henriques FB (van Veen, tbc) Simon Baird (tbc) John Pedersen (tbc) DISTRIBUTION LIST: EATM

2 Page 2 of 12 HISTORY OF CHANGES REV. NO. DATE PAGES DESCRIPTIONS OF THE CHANGES All Initial version All Comments from I. Efthymiopoulos, L. Gatignon, J. Pedersen All Comments of the meeting and especially from S. Grau

3 Page 3 of 12 TABLE OF CONTENTS 1. Introduction Safety Matrix... 5 Safety Alarms... 5 Safety matrix Summary... 7 Appendix... 7 East Area (EA)... 7 Anti-proton Decelerator (AD)... 7 Experimental Hall North 1 (EHN1)... 7 Experimental Hall North 2 (EHN2) Experimental Cavern North 3 (ECN3) Flexibility and future adaptations References... 11

4 Page 4 of Introduction Active safety systems of the general infrastructure cover the fire and gas detection, the alarm buttons (AUG, AUL, evacuation alarm) and the resulting actions of informing the fire brigade, siren sound, closing the gas supply and disconnecting electricity. For a single approach the concept of these active alarms for Secondary Beam Areas (SBA: East Area, AD, EHN1, EHN2, ECN3) is commonly defined. This document describes the implementation in EHN1 (as an example for a Secondary Beam Area). The update of these safety systems was triggered by an event in 2012, where a power cut in the ALPHA experiment in the AD hall caused a failure of a PLC NANO. An inspection of the PLC installation revealed that most of the inputs are bridged and some of the PLCs are installed but not cabled. A straight forward replacing of these PLC NANOs is not possible as they are obsolete and out of production. Due to the obsolete material as well as an urgently needed revision of the safety risk and requirements, this PLC installation should be replaced. Preparatory meetings and actions with EN-EL, EN-ICE, GS-ASE, DG-HSE, and EN-DSO took place in the recent months: - An inventory of the PLC NANO in the East Hall, West Hall, AD Hall EHN1 and EHN2 has been distributed. - The implementation plans for fire/gas detection and a previous safety matrix have been transmitted. - A safety recommendation for fire and gas detection has been issued by HSE (EDMS ). The following strategy to renovate the safety systems has been agreed: 1. In this document, prepared by EN-MEF, the functional requirements including all inputs (sensors) and outputs (actions) that are requested for Secondary Beams and Areas are described. 2. GS-ASE and EN-EL will establish a list of removable signal lines between the ASE detectors and the PLC NANO. 3. With the above input EN-EL will prepare an ECR, which details the changes, the needed requirements and consequences on the technical implementation. Radiation-protection monitoring is not part of the general infrastructure. The safety access system is also not included as it does not impact on the implementation concept of the active safety systems covered in this document. Complementary to the active safety systems, the passive safety systems like shielding, barriers etc. will be covered in a dedicated document at a later stage.

5 Page 5 of Safety Matrix The safety matrix summarizes the different safety alarms (sensors) and the required actions (actuators) needed for the Secondary Beams and Areas. Safety Alarms In the following the active safety systems are described, detailing the zones where the safety buttons and safety detectors (sensors) shall be installed. For each safety sensor the associated, automatic safety actuator is described. - AUG: The AUG is a general button, which shall cut the electrical power (18 kv cell or higher) and inform the fire brigade. It does not launch the evacuation alarm. The AUG red buttons shall be placed along the corridors about every 25 m, taking into account the AUGs placed on the outside of the PPEs /PPXs, of the ground floor, the first floor, the upper gallery and in the underground galleries of the building. - AUL: The AUL shall cut the electrical power of the local area. Such a local area could be a single barrack (e.g. for beam instrumentation (BI) or a clean room or a work shop) or a user s control room barrack (or group of) together with the associated beam zone. The AUL red button is placed in the beam zone and the associated barracks. There could be several AUL buttons per barrack group and beam zone (depending on the size). There are also equipment stop button(s), which are not discussed here (e.g. workshops, racks ) and which shall not be confused with an AUL. The AUL only cuts the power of the socket outlets and fixed users installations in the respective zone, but does not cut the power of beam line instrumentation (BI) and magnets in there. Latter elements are only stopped using the AUG. BI barracks shall be equipped with their individual AUL. N.B.: AUGs shall not be placed in barracks and beam zones, AULs shall not be placed in corridors/galleries; this is to avoid confusion for the personnel, having to choose between emergency button options. - Oxygen Deficiency Hazard: ODH detection shall be placed in enclosed zones, where neutral gases are used and can be trapped. Enclosed zones also include pool like constructions with open roof, where heavy gases can cause an ODH. Additionally an ODH detection system shall cover the adjacent underground area connected to these areas. The detailed coverage in the underground areas is subject to a dedicated risk assessment of each case (e.g. safety folder). An ODH alarm does not cut any supply line automatically. An ODH alarm, after confirmation with two independent sensors, triggers a building wide evacuation alarm and informs the fire brigade. - Flammable gases: Flammable gas detection is placed in beam zones and in distribution (mixing) areas of the ground and first floor, where flammable gases (mixtures) are present. The detection of flammable gases shall automatically cut all flammable gas supplies. Gas detection heads shall be available for all users beam zones (see Annex for details) and at locations of gas mixing and distribution

6 Page 6 of 12 panels (ground and first floor only). The number of gas detection sensors for the specified areas can vary (also in terms of gas type). The local emergency indications of gas detection (ODH yellow panel, red alarm for flammable gases, local siren) are not explicitly listed here, although they shall be included in the installation. - Fire detection: The fire detection concept of the Secondary Beam Areas is designed and installed for personnel protection. It does not cover an area wide equipment protection, but is only limited to the areas where personnel protection is applied. Facility users can install a local fire detection system to their equipment by own initiative. The fire detection acts in two stages: With a single alarm the fire brigade is informed. With a confirmed alarm two detections at a time the building wide evacuation alarm will be triggered. Fire detection shall be placed in all enclosed areas (e.g. barracks, GIF ) inside a Secondary Beam Area and in the underground galleries. Additionally, the semi-enclosed zones, namely the (fenced) zones, which are covered by first floor constructions and which contain electrical alive equipment, shall be equipped with a fire detection system. A hall (e.g. EHN1) as a whole will not be equipped with a general fire detection system (e.g. sniffer or laser beam system under the roof). - Evacuation alarms: Evacuation alarm buttons shall be placed next to all personnel entrance doors (e.g. next to the blue doors and inside EHN1). It shall trigger the evacuation alarm and inform the fire brigade. - Temperature sensors: There are no automatic actions by temperature sensors. The functionality of previously installed temperature sensors, serving as fire detection systems, is not verified anymore. The ventilation system of Secondary Beam Areas on the surface is not influenced in any way by these alarm systems. The ventilation system is not part of the safety concept of such buildings. This aspect has to be studied separately for underground areas (e.g. if the ventilation should be stopped in case of fire in the underground areas of ECN3). Safety matrix Table 1 shows the safety alarms and corresponding actions compiled in a table. Table 1: Safety matrix (N.B.: In some cases, as indicated by tbd, the flammable gas detection shall cut the electrical power and the fire detection shall act on the flammable gas supply. Both cases have to be studied for the individual installations in the Secondary Beam Areas.) a) The fire detection acts in two stages: With a single alarm the fire brigade is informed. With a confirmed alarm two detections at a time the evacuation alarm will be triggered.

7 action siren inform fire disconnect electricity cut gas supply input (evacuation brigade local 18kV neutral flammable AUG - X - X - - AUL - - X ODH X X gas detection (flammable) X local X - tbd - X fire detection a X X tbd evacuation alarm X X temperature sensors Page 7 of Summary Appendix The concept of the presented active safety alarms has been well defined and a clear safety matrix has been established. This concept is applicable to all Secondary Beam Areas buildings (East Area, AD, EHN1, EHN2 and ECN3). However, the West Area is not part of the SBA anymore. The following tables list in detail the areas of various types like barrack, beam zone, fenced areas within the Secondary Beam Areas. The adjacent columns indicate the requirement for the different alarm actuators and sensors according to the concept detailed in section 2. East Area (EA) Anti-proton Decelerator (AD) Experimental Hall North 1 (EHN1) All beam zones and associated barracks (=counting rooms) of EHN1 are listed in Table 2 (see also Figure 1 for graphical illustration of these AUL zones). The barracks without association to a beam zone are listed in Table 3. Table 4 and table 5 list other areas like corridors, fenced areas and areas equipped with gas distribution. Generally, the tables only indicate the necessity for the different alarm systems. Nevertheless in special cases the number in brackets indicates the number of alarm sensors within this area (e.g. the AUG buttons on the corridors are summarized in one line, the clean room is split into two rooms and the fire detection system shall be designed accordingly). The cells with blue background indicate that this number can change in the years to come.

8 Page 8 of 12 Table 2: Alarm systems of the beam zones and associated barracks beam zone zone barrack (associated) AUG AUL ODH flammable gas detect. fire detection evacuation alarm PPE112 - yes - - R-B42 - yes - - yes - R-K10 - yes - - yes - R-L14 - yes - - yes - PPE132 H2a - yes PPE142 H2a - yes yes PPE152 (H2A) - yes yes (2) A52 - yes - - yes - 1-A53 - yes - - yes - 1-A61 - yes - - yes - periphery zones - yes 1 1 yes - in PPE152 R-E56 - yes - - yes - in PPE152 R-F yes - PPE172 (H2B) - yes A77 - yes - - yes - 1-B69 - yes - - yes - 1-B71 - yes - - yes - 1-B81 - yes - - yes - periphery zones - yes 2 2 yes - PPE134 (H4A) - yes B41 - yes - - yes - 1-A47 - yes - - yes - PPE144 (H4B) - yes P95 - yes - - yes - 1-M95 - yes - - yes - PPE154 (H4C) - yes 4 15 yes - 1-Q86 - yes - - yes - 1-R87 - yes - - yes - PPE164 (H4D) - yes B95 - yes - - yes - 1-E95 - yes - - yes - including laser - yes - - yes - PPE126 - yes 2 3 yes - 1-Q44 - yes PPE yes PPE146 (H6A) - yes Q45 - yes - - yes - PPE156 (H6B) - yes R52 - yes - - yes - 1-R53 - yes - - yes - PPE166 (H6C) - yes 4 4 yes - 1-Q54 - yes - - yes - PPE yes PPE128 (H8Z) - yes Q40 - yes - - yes - 1-Q43 - yes - - yes - PPE138 (H8A) - yes Q40 - yes - - yes - 1-Q43 - yes - - yes - PPE yes PPE158 (H8B) - yes R-Q56 - yes - - yes - R-Q58 - yes - - yes - R-Q60 - yes - - yes - R-Q64 - yes - - yes - R-Q66 - yes - - yes - R-Q69 - yes - - yes - R-Q71 - yes - - yes - PPE168 (H8C) - yes Q67 - yes - - yes - 1-R77 - yes - - yes - 1-Q70 - yes - - yes -

9 Page 9 of 12 Table 3: Stand-alone barracks (not associated with other zones/areas) barrack AUG AUL ODH flammable gas detect. fire detection evacuation alarm BI 1-A49 - yes - - yes - BI 1-B94 - yes - - yes - BI 1-Q04 - yes - - yes - BI 1-R37 - yes - - yes - BI 1-Q72 - yes - - yes - BI 1-Q95 - yes - - yes - BI R-C yes - Concierge R-B yes - R-B yes - R-B45 - yes - - yes - R-B47 - yes - - yes - R-B57 - yes - - yes - R-B yes - RP R-B yes - R-A yes - HNA180 R-B75 - yes - - yes - HNA180 R-B76 - yes - - yes - HNA180 R-B79 - yes - - yes - HNA183 R-A yes - HNA183 (MNP22) R-B84 - yes - - yes - HNA186 R-B yes - R-B90 - yes - - yes - CMS laser R-E yes - in PPE164 R-L89 - yes - - yes - in PPE164 R-L yes - HNA238 R-Q37 - yes - - yes - HNA238 R-Q yes - R-Q41 - yes - - yes - HNA386 1-B88 - yes - - yes - HNA485 meeting roo1-q yes - HNA484 1-Q yes - HNA483 1-Q80 - yes - - yes - HNA451 1-Q42 - yes - - yes - cafeteria 1-A yes - Table 4: Areas not being fenced, barracks etc. (N.B.: The naming HNAxxx will be supressed.) zone (s) AUG AUL ODH flammable gas detect. fire detection evacuation alarm corridors RDC yes (5) corridors 1er yes (6) clean rooms R-C14; R-C20 - yes - - yes (2) - R-Q11; R-R12 - yes - - yes (2) - underground galleries 15 - yes (17) - yes (sniffer) - gallery (crane level) toilets work shop

10 Page 10 of 12 Table 5: Fenced storage areas, fenced gas zones and stand-alone gas panels (neutral and flammable gases) fenced areas and gas zones AUG AUL ODH flammable gas detect. fire detection evacuation alarm storage area (not listed separately) Gas zones B yes (3) yes (3) - - R-C yes (3) yes (3) yes - R-C yes (3) yes (3) yes - 1-R yes (3) yes (3) R yes (3) yes (3) R yes (3) yes (3) - - R yes (3) yes (3) yes - Gas panels NEUTRAL R-K yes (2) R-R yes (2) R-Q yes (2) R-Q yes (2) R-Q yes (2) R-R yes (2) R yes (2) R-Q yes (2) R-C yes (2) R-B yes (2) R-B yes (2) R-B yes (2) R yes (2) R-B yes (2) R yes (2) Gas panels FLAMMABLE R yes (2) - - R-Q yes (2) - - R-J yes (2) B yes (2) A yes (2) A yes (2) A yes (2) - - The beam zone Z for all beam lines is suppressed. Experimental Hall North 2 (EHN2) Experimental Cavern North 3 (ECN3) Flexibility and future adaptations Table 1 was compiled such, that a change in the assignments of barracks to beam zones will not change.

11 Page 11 of 12 The tables 2-5 indicate also the alarm sensors, where future requests might require an adapted layout due to future requirements (blue background). In most cases this could be covered by introducing additional gas detection systems 1. The currently planned extension of EHN1, the future hall hosting neutrino detector tests, requires a similar layout of alarm systems, with special focus on ODH in the pools. This is a future project, which has no impact on the current layout of the required installations, although the same concept for the active safety systems will be applied. References [1] Safety recommendation file for fire and gas has been issued by HSE: [2] Various EATM minutes and see doc minutes-plc docx 1 Detection heads, either ODH or for flammable gases, use the same kind of cabling, so they are exchangeable. A sufficient number of signal lines would cover any future request.

12 Page 12 of 12 Figure 1: Ground floor (above) and first floor (below) of EHN1 with arrows indicating the assignment of barracks to beam zones.