2 Welding procedure preparation
2.1 Welding materials
The welding engineer prepares the corresponding "Welding Materials Procurement Technical Specification" in accordance with the standard and AP1000 relevant specification (or technical condition). The purchaser purchases within the scope of the qualified supplier list according to the technical specification requirements. The welding materials should meet the AP1000 relevant specification (or technical conditions), relevant contents of ASME Section II C Division and ASME Section III, the professional and technical personnel are dispatched to conduct the site witness and acceptance check of the welding materials. According to the provisions of SPEC8802 " Welding Materials Receiving Inspection System for the Nuclear Equipment "， the checked and accepted (or retest) welding materials can only be used for the product welding. The checked and accepted welding materials should be stored in the welding materials storehouse, and stored, issued in accordance with the provisions of SPEC8803 " Welding Materials Management System for the Nuclear Equipment". The major welding materials of the product refer to the attached table 1.
2.2 Welding procedure qualification
The welding engineer prepares a list of welding procedure qualification in accordance with the design drawings and AP1000 related specification (or technical condition), ASME Section IX, combined with the equipment, welder or welding operator of the welding shop etc. The welding procedure qualification should be implemented in accordance with SPEC8803 " Welding Procedure Qualification Management System for the Nuclear Equipment Manufacturing ". Each of qualification in the list should be prepared a "Instruction for Welding Procedure Qualification ", and welding procedure qualification test should be conducted. The welding procedure qualification test should select the qualified base metal and welding materials, and with qualified welding equipment, completed by the skilled welder or welding operator. The test sample is qualified by non-destructive testing, postweld heat treatment (when necessary) and physical and chemical test. The "Welding Procedure Qualification Report" is prepared after passing the qualification test, approved by the welding principal engineer. The qualified welding procedure qualification is the basis to prepare the "Welding Procedure Qualification Report" of the product, is also the basis to prepare "Welder/Welding Operator Examination Regulation". Major welding procedure qualification items of the product refer to the attached table 2.
