ASME N509 pdf download

ASME N509 pdf download.NUCLEAR POWER PLANT AIR-CLEANING UNITSAND COMPONENTS.
ASME N509 covers requirements for the design, construction, and qualification and acceptance testing of thc air-cleaning units and components which make up Engineered Safety Feature (ESF) and other high efficiency air and gas treatment systems used in nuclear power plants.
1.1 LimitatIons
The Standard does not cover sizing of a complete nuclear air treatment system, redundancy, or single-failure requirements. It applies only to systems which employ particulate filtration, ambient-temperature adsorption. or both, as the principal functional mechanism. It does not apply to condenser off-gas systems. Also, it does not apply to other applications that employ primarily gas storage or holdup, cryogenic adsorption or fractionation, or solvent absorption as the principal method of gas treatment. Nor does the Standard cover requirements for containment isolation valves, recombiners, comfort heating, air-conditioning, or ventilation to achieve ordinary cooling or industrial hygiene obectives. Field acceptance testing of nuclear air-treatment systems is covered in ASME AG-i, Section TA (the primary reference was to ASME N510-1989).
1.2 Purpose
The Standard identifies and establishes requirements for filters, adsorbers, moisture separators, air heaters, filter housings, dampers, valves, fans, ducts, and other components of nuclear air-treatment systems for a specific application in a nuclear power plant. The Standard also establishes requirements for operahilit maintainability, and testability of systems necessary for the maintenance of system reliability for the design conditions. Qualification and acceptance testing provisions are specified to verify the adequacy of the air-cleaning unit and component design, to verify that components have been properly fabricated and installed, and that the system will perform in accordance with specification requirements.
2 APPLICABLE DOCUMENTS
The following documents supplement this Standard and are a part of it to the extent indicated in the text. The issue of the referenced document noted below shall be in effect. If no date is listed, then the issue of the referenced document in effect at the time of the Purchase Order shall apply.
The fan and system characteristic curves shall be included in the system documentation. The fan shall be selected to operate on the stable portion of its pressure curve under all operating conditions. Provision shall be made in the design to maintain stable operation under the design flows and varying pressure range. Inlet vanes, inlet/outlet damper modulation, variable speed fan control are acceptable alternatives.
5.8 Fan Drives
Fan drives shall meet the requirements of ASME AGI, Section BA.
5.8.1 Integral Horsepower Motors — General. Motors shall comply with and be tested and rated in accordance with applicable requirements of NEMA MG-I, and IEEE il2A. Performance shall be verified by either test or certification as specified for each requirement. Rated service factor shall be a minimum of 1.0 unless specified otherwise.
Motors shall be sized to supply maximum mechanical load demand without exceeding the rated horsepower under all identified operating conditions and to produce the required torque and acceleration as required by the driven equipment under the most adverse voltage, frequency and conditions specified, and shall be designed for the starting sequence specified by the Engineer.
5.8.2 DrIves for ESF Systems. Drives in ESF systems shall comply with IEEE 323. In addition, drives of ESF systems located inside containment shall be qualified in accordance with IEEE 334.
ESF fan drives shall be qualified in accordance with IEEE 344. Motor supports and hangers shall be designed to withstand all seismic and operating loads with the motor in its normal operating orientation without impairment of operating tha racteristics.
5.9 Dampers
Dampers shall meet the requirements of ASME AG1, Section DA.
5.10 Ducts
Ducts shall meet the requirement of ASME AG-I, Section SA.
6 PACKAGING, SHIPPING, RECEIVING. STORAGE, AND HANDLING OF COMPONENTS
Packaging, shipping, receiving, storage, and handling shall meet the requirements of ASME NQA-i; ASME AG-i, Article AA-7000, and various specific ASME AGI Code section.
7 INSTALLATION AND ERECTION.