Describethemanagementofultraviolet(UV：24902描述的紫外線（UV的管理

1、24902 version 1Page 4 of 4Describe the management of ultraviolet (UV) disinfection processesLevel5Credits5PurposePeople credited with this unit standard are able to describe: UV disinfection processes, variables which determine their effectiveness, and design features; methods of UV generation, moni

2、toring equipment, safety considerations; and operating issues associated with UV disinfection; and identify critical points, hazards, preventive actions, and corrective actions of UV disinfection processes.SubfieldWater IndustryDomainDrinking-WaterStatusRegisteredStatus date19 September 2008Date ver

3、sion published19 September 2008Planned review date31 December 2013Entry informationOpen.Replacement informationThis unit standard, unit standard 24900, and unit standard 24901 replaced unit standard 18453.AccreditationEvaluation of documentation and visit by NZQA, industry and teaching professional

4、in the same field from another provider.Standard setting body (SSB)Primary Industry Training OrganisationAccreditation and Moderation Action Plan (AMAP) reference0179This AMAP can be accessed at t.nz/framework/search/index.do.Special notes1ReferencesMinistry of Health Public Health

5、 Risk Management Plan Guides for Drinking-Water Supplies (PHRMPGs):P7.4, Ultra-violet irradiation disinfection.Drinking-Water Standards for New Zealand, Ministry of Health, Wellington, 2000 and 2005.2DefinitionsDrinking-water supply the supply catchment, treatment plant, and distribution. The drinki

6、ng-water supplier has responsibility for managing the public health risks of the drinking-water supply.Critical points points in a process or in equipment where failure to function correctly can lead to a public health hazard.Organisational procedures instructions to staff, and procedures which are

7、documented in memo or manual format and are available in the workplace. These requirements include but are not limited to site specific requirements, manufacturers specifications, product quality specifications, and legislative or regulatory requirements.Elements and performance criteriaElement 1Des

8、cribe UV disinfection processes, variables which determine their effectiveness, and design features.Performance criteria1.1UV disinfection processes are described in terms of the mechanisms by which UV inactivates micro-organisms.1.2UV disinfection is described in terms of the variables which determ

9、ine the effectiveness of the process.Rangeincludes but is not limited to transmittance, contact time, temperature, turbidity, organic and inorganic loading, intensity, wavelength.1.3UV disinfection processes are described in terms of their design features.Rangetypical sizes, configurations.Element 2

10、Describe the methods of UV generation, monitoring equipment, and safety considerations.Performance criteria2.1UV disinfection processes are described in terms of types of the equipment used for generation.Rangereactor, low pressure and medium pressure lamps, ballasts, intensity sensor, transmittance

11、 meter.2.2UV disinfection processes are described in terms of monitoring equipment.Rangeprocess control, alarms.2.3UV disinfection processes are described in terms of the delivery mechanisms of UV light which can contribute to under or over dosing.2.4UV disinfection processes are described in terms

12、of safety considerations when handling.Element 3Describe operating issues associated with UV disinfection.Performance criteria3.1UV disinfection is described in terms of operating issues.Rangeflow rates, continuity of disposables and power supply, dose rate control, alarm response, drinking-water st

13、andard transgression, corrosion, equipment failure, safety of public, equipment calibration and servicing, record keeping.Element 4Identify critical points, hazards, preventive actions, and corrective actions of UV disinfection processes.Performance criteria4.1The critical points in the disinfection

14、 processes are identified in accordance with organisational procedures.4.2The hazards at each critical point are identified in terms of the causes of the events leading to their appearance, and the risk factors.4.3The preventive and corrective actions for events related to each hazard are identified

15、.Please noteProviders must be accredited by NZQA, or an inter-institutional body with delegated authority for quality assurance, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.Industry Training Organisations must be accred

16、ited by NZQA before they can register credits from assessment against unit standards.Accredited providers and Industry Training Organisations assessing against unit standards must engage with the moderation system that applies to those standards.Accreditation requirements and an outline of the moder

17、ation system that applies to this standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The AMAP also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and a