17433 version 3
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Carry out controlled shutdown of thermal electricity generation plant
Level
6
Credits
10
Purpose
People credited with this standard are able to: demonstrate knowledge of
thermal plant shutdowns; operate and monitor plant during a unit shutdown;
and identify and respond to deviations in a controlled shutdown.
Subfield
Electricity Supply
Domain
Electricity Supply - Thermal Operations and Control
Status
Registered
Status date
23 October 2001
Date version published
25 June 2007
Planned review date
31 December 2008
Entry information
Recommended: National Certificate in Energy and
Chemical Plant (Process Operation) (Level 4) with
optional strands in Refrigeration, Steam Generation,
Ancillary Operations, Geothermal, Waste Treatment,
and Co-generation [Ref: 0141]; and National Certificate
in Electricity Supply (Thermal Plant Operator) (Level 4)
with strands in Thermal Operations, Combined Cycle
Operations, and Co-generation Operations [Ref: 0894];
Unit 17448, Monitor turbine supervisory from a thermal
electricity generation control room; and Unit 17428,
Operate steam raising equipment from a thermal
electricity generation control room; or demonstrate
equivalent knowledge and skills.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
Electricity Supply Industry Training Organisation
Accreditation and Moderation Action Plan (AMAP) reference
0120
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
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Special notes
1
This unit standard is intended for, but not restricted to, workplace assessment. The
range statements within the unit standard can be applied according to industry
specific equipment, procedures and processes.
2
Safety of personnel and plant must be a priority throughout the assessment. If the
safety requirements are not met the assessment must stop and the candidate will be
assessed as not yet competent.
3
Performance and work practices in relation to the elements and performance criteria
must comply with all current legislation, especially the Electricity Act 1992, and any
regulations and codes of practice recognised under that statute; the Health and
Safety in Employment Act 1992; and the Resource Management Act 1991.
Electricity supply industry codes of practice and documented industry procedures
include the Safety Manual – Electricity Industry (SM-EI) (2004) Wellington: Electricity
Engineers’ Association. A full list of current legislation and industry codes is
available from the Electricity Supply Industry Training Organisation, PO Box 1245,
Hamilton.
4
‘Industry requirements’ include all the documented workplace policies, procedures,
specifications, business and quality management requirements relevant to the
workplace in which assessment is carried out.
5
The term ‘operate’ is defined as the remote operation, testing and commissioning of
main and auxiliary thermal plant systems associated with large steam/electrical
generation plant from a control room environment.
Elements and performance criteria
Element 1
Demonstrate knowledge of thermal plant shutdowns.
Performance criteria
1.1
Shutdown steps are explained in accordance with industry requirements.
Range
1.2
includes but is not limited to – de-loading, system shutdowns,
dosing, cooling water systems, condensate and feedwater system,
electrical, taking unit off load, offer profile.
Shutdown unit responsibilities are described in accordance with industry
requirements.
Range
includes but is not limited to – observations after trip, purge,
topping up boiler, feedpump shutdown, breaking vacuum, system
shutdowns, oil pumps, barring gear.
 New Zealand Qualifications Authority 2016
17433 version 3
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Element 2
Operate and monitor plant during a unit shutdown.
Performance criteria
2.1
Status of systems is monitored throughout the shutdown procedure.
2.2
Routine operations are carried out in accordance with industry requirements.
Range
includes but is not limited to – unit shutdown.
2.3
Actions are logged in accordance with industry requirements.
2.4
Operating decisions are determined in accordance with plant status and
industry requirements.
Range
2.5
includes but is not limited to – plant availability and service
condition, resource consent and loading limits, impact on
operations, options.
Plant and equipment are monitored in accordance with industry requirements.
Element 3
Identify and respond to deviations in a controlled shutdown.
Performance criteria
3.1
Deviations from normal operating conditions are identified, reported and
explained in accordance with industry requirements.
Range
3.2
Possible emergency situations are identified and plant procedures are located
and explained in accordance with industry requirements.
Range
3.3
includes but is not limited to – drum level excursions, barring gear
fail to start, electrical supply failures, drain valves failed to open,
unit fail to de-excite, over pressurisation.
includes but is not limited to – turbine stop and control valve fail to
close, overspeed, post trip flame detection.
Plant safety procedures are followed in accordance with industry requirements.
Please note
Providers 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 accredited by NZQA before they can register
credits from assessment against unit standards.
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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 moderation 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 assessors, and special resource requirements.
Comments on this unit standard
Please contact the Electricity Supply Industry Training Organisation info@esito.org.nz if
you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016