HAZID WORKSHEET. Project: ANOA PHASE 4 – AGX COMPRESSION RECONFIGURATION PROJECT Node Description: DLB Activities in the vicinity and. As a result of the HAZID, 80 identified hazards in total were .. the workshop were also recorded relevantly in the HAZID worksheet by an. The HAZID study achieved its aim of identifying the nature and scale of hazards that Attachments: Power Plant Risk Register Spreadsheet.
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The severity indicates the possible extent of damage; the frequency indicates how often this happens. These spectra were developed for seismic PSA and aimed to have a risk of exceedance uniform for all workshdet hence their nameunlike the varying conservatism implicit in piecewise linear spectra.
Single failure criterion Safety systems required in response to any annual probability of exceedance external hazard should comply with the single failure criterion. This has the merit, usually, of exploring the response of the plant to a wide range of hazard levels and is accepted internationally as a reasonable approach for external hazards. The potential for electro-magnetic interference to instrumentation and control equipment should be considered.
The assessor should establish that the potential threats are recognised by the operators and appropriate prearranged responses are embodied in operating instructions.
Where this is not feasible in the case of existing facilities, the risk must be shown to be tolerable and ALARP. Hydrogen Production By Steam Reforming.
July 8, at 3: Extreme wind Licensees, any particular application should be assessed to ensure that there are no plant specific, i. Windows may automatically block specific Excel functionality for security reasons. The effects of climate change should also be taken into account see section 4.
Sensitivity studies It should also be borne in mind that forecast climate change is likely to have an impact on many of the external hazards addressed here. To check if you have the Advanced features, follow these steps:. In assessing safety systems claimed to mitigate the effects of external hazards, the assessor should have due regard to Reliability, redundancy, diversity and segregation. These SAPs therefore require a level of interpretation by the assessor and make it clear that all relevant external hazards should be considered when determining the design basis events for both probabilistic and deterministic safety cases and provide the numerical targets for assessing whether the risk from external hazards is tolerable and ALARP.
For other hazards, such as seismicity, the forces acting on the installation will continue to yazid progressively with increasing size or proximity of the event.
If a PSA is not used to demonstrate the absence of an adverse cliff edge effect either an approximate PSA approach may be undertaken a NUREG describes a technique for earthquake hazard or a deterministic-plus-engineering judgment approach may be made. If you want your ex-girlfriend or ex-boyfriend to come crawling worksheeh to you on their knees no matter why you broke up you need to watch this video right away As with the other environmental hazards it is important to ensure that the most up-to-date information available for a specific site is used in the hazard assessment.
It can be assumed that there will be at least several hours notice of extreme conditions developing, and often several days. Most UK nuclear facilities are potentially subject to flooding both by extreme precipitation directly onto the site, and indirectly from nazid and the sea.
A dialog pops up. The hazard sheets contains four risk matrices: Seismic Seismic hazard definition should include a reasonable frequency distribution of accelerations, i.
The flooding safety case should not be sensitive to the level of the hazard, and operational response may be required. This file originated from an Internet location and might be unsafe. Further details of a particular method are published by the IAEA see below. More recently uniform hazard spectra UHS have also been worksheey.
In the matrix, an hazard potential rating is assigned to each of the combinations of frequency and severity. In the case of seismic engineering, one approach which has been adopted has been to show that workwheet response of the plant remains fully elastic up to a significant margin beyond the design basis.
To resolve, click “Enable Editing”. Impacts and Shock loading This can be due to external explosions and overpressures giving rise to shock loading and drop loads or impacts due to facility collapse, which may include cranes, building structures and systems.
The risk matrices sheet allows you to configure risk matrices, which determine the hazard potentials. A wind load reduced from one in fifty years to one in two years has been used for the design of some facilities, and is broadly consistent with the foregoing time at risk considerations.
For each of the risk matrices, the severity is the worst that can happen when the top events occur, for workshret of the categories.
The risk matrices sheet is shown below: Licensees should be expected to take the latest available predictions over the projected life of the facility, which may need to include the decommissioning phase of the installation in the submissions. Such spectra have been used for the design of new plant and for the design basis assessment of existing plant. The way in which this principle is satisfied may depend on the nature of the hazard being addressed. This can be due to external explosions and overpressures giving rise to shock loading and drop loads or impacts due to facility collapse, which may include cranes, building structures and systems.
For design purposes, this has been the practice internationally, and in the UKto use piecewise linear spectra based on a median-plus-standard deviation level of conservatism.
It has also been demonstrated in numerous earthquakes that structural ductility is very desirable. Ductility is increasingly being required by nuclear and non-nuclear structural seismic design standards even where the structure is designed to remain elastic under the design earthquake loads.
UHS spectra have been derived for various confidence levels, including the expected level, which is appropriate for seismic PSA and assessors should consider whether all relevant external hazards are listed in the fault schedule. External hazards may particularly give rise to common mode or common cause failures.
For these reasons, aircraft are often grouped into a small number of types workzheet eg large commercial aircraft, light aircraft and military aircraft – to facilitate the analysis.
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