ࡱ> MOL "bjbjΚΚ x@ \\\\\$PT} R@dX,!$" \" 0\\7 000\\000] EM 0} 7%07% 0\ " " 0} 7% ":   * INTERPRETATION - "Department" means College/School/Department/Centre/Unit as relevant. 18.26.1 INTRODUCTION Departments must have their own rules specifying the circumstances in which experiments may be left unattended or run overnight. In principle, the equipment used will usually be required to be flame-free and to incorporate all necessary fail-safe devices. Water supplies must be well secured to guard against over-night increases in pressure. (The mains water pressure will increase by over 50% overnight due to reductions in overall water use). Notices must be posted near the equipment and/or on the door of the laboratory for the benefit of General Services. This should describe briefly the operation being undertaken, the emergency procedures to be followed under defined circumstances and how to contact the experimenter or other similar person in authority. In Departments where it is desired to run apparatus throughout the night, the activity and potential hazards should be evaluated &controlled by the use of a departmental written permit system to authorise such activities. Such a system might produce three written copies of the same information - one for Departmental records, one for the experimenter (to be displayed prominently beside the equipment) and the third for the benefit of the Security Patrolman (and displayed on the door of the laboratory). Advantages of such systems are that they can be designed so as to require the countersignature of a research supervisor or senior member of staff, thus providing the opportunity for an objective assessment of the hazards involved, either via the apparatus itself or via services; information can also be provided for General Services patrol staff so that in an emergency the patrol staff can turn off the apparatus - preferably by turning no more than two or three conspicuously labelled switches or valves. (N.B. The order of turning these off should be made clear too!) 18.26.2 HAZARDS Equipment left running unattended for extended periods may pose hazards of fire, explosion, toxic release or spillage. The risk depends upon the conditions of the experiments or tests. Flooding causing damage to building and equipment. 18.26.3 RISKS The risks associated with the aforementioned hazards are to be assessed by the Department (using the appropriate technical input where necessary). These assessments shall be carried out using: Check lists provided (where applicable) and Departmental Hazard Identification/Risk Assessment Work Sheets contained in Document No.3 i.e. Departmental Hazard Risk Assessment (D.H.R.A.). 18.26.4 ARRANGEMENTS AND CONTROLS REQUIRED These hazards and risks will be minimised by the following arrangements and controls: Apparatus which is left running overnight must comply with the following requirements: Apparatus may only be left running overnight with the express permission of the research supervisor, Departmental Safety Adviser or similar senior member of staff. Any apparatus, which will be left running overnight, will be notified to the General Services Supervisor in advance. The apparatus must be operated attended for at least one hour under the exact conditions under which it will be run unattended. A notice must be posted on the apparatus and on the laboratory door stating that the apparatus is an approved project to be left running overnight and carrying the name, address and telephone number of the person in charge who may be summoned in an emergency (notwithstanding the other useful information discussed above). An unattended experiment - "Please Leave On Sign" must be clearly visible on all unattended experiments. This sign must contain the following information: Procedures to be taken in emergency or power failure. Locations of gas, electricity and water supply and where these can be turned off or isolated. The experiment must have a label giving details of reaction and chemical risk An Overnight Experiment Label must be placed on laboratory door 18.26.4 ARRANGEMENTS AND CONTROLS REQUIRED (contd.) Appropriate fail-safe devices must be fitted to guard against failure of utilities e.g. water supplies. seq level0 \h \r0 seq level1 \h \r0 seq level2 \h \r0 seq level3 \h \r0 seq level4 \h \r0 seq level5 \h \r0 seq level6 \h \r0 seq level7 \h \r0 Water supplies require two categories of precaution: The water pressure should be regulated automatically by means of a regulator ahead of the valve that sets the flow. This regulator should be protected by a filter to prevent foreign particles e.g. rust from clogging it. The water flow should be automatically monitored so that if it is interrupted all energy sources, gas and water supplies automatically shut down. Water connections must be securely clamped by screw clip or similar device, not wire. Only clear thick walled neoprene plastic tubing to be used. All fire precautions must be observed and Any unattended experiment must be flame-free and must incorporate suitable and adequate fail-safe devices. Experiments which may generate toxic gases/fumes and which depend on fume cupboard ventilation to control potentially hazardous environments forming overnight will be discouraged, unless there is automatic, remote monitoring of: a fume cupboard operational status, and a gas detection/alarm system (fitted in the immediate vicinity of the experiment). All stocks of potentially hazardous materials not actually in use must be either removed from the laboratory or kept in proper stores. No experiment or test will be left unattended for longer than is absolutely necessary. N.B. See also Section B.04 and B.07 in Safety Manual for the UCC Chemical Laboratories by Dr. F.J. Lalor. 18.26.5 ARRANGEMENTS AND CONTROLS The details of the Arrangements and Controls in place and those required in the short, medium and long term, shall be set out by the Department in the forms provided in Document No.4 i.e. Departmental Safety Action Plan (D.S.A.P.). These Arrangements and Controls shall be reviewed and updated on a yearly basis. 18.26.6 RESPONSIBILITIES The following personnel are responsible in the Department/Office/Area for ensuring the implementation and ongoing compliance with the aforementioned arrangements and controls. AREA/LOCATIONPERSON RESPONSIBLE1.2.3.4.5.6.   DEPARTMENT SAFETY STATEMENT DOCUMENT NO. 2: Requirements for the Control of Hazards and Risks SECTION 18.26.0 - Overnight Experiments and Unattended Operations Rev.1 seq _endnote \* ArabicError! Main Document Only. PAGE   PAGE 1 of  NUMPAGES 2 AppSc\Doc2\Sect18.26 DOCUMENT NO. 2: Requirements for the Control of Hazards and Risks SECTION 18.26.0 - Overnight Experiments and Unattended Operations Rev.1 seq _endnote \* ArabicError! 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