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RCC-M Section II – Material Specifications For The Procurement, Manufacturing, And Inspection Of Materials Used In Pressurized Water Reactor (PWR) Nuclear Components
Ordering Information
- Specifies requirements for material procurement, including:
- Material designation (e.g., grades, product forms)
- Applicable standards (e.g., NF, EN, ASTM equivalents)
- Delivery conditions (heat treatment, surface finish, dimensions)
- Supplier documentation (material certificates, test reports)
- Marking and traceability requirements
Material Codes & Classification
- Covers ferrous and non-ferrous materials used in nuclear components:
- Carbon & alloy steels (e.g., P265GH, 16MND5)
- Stainless steels (e.g., Z2CN18-10, Z2CND17-12)
- Nickel-based alloys (e.g., NC15Fe, NC30Fe)
- Other materials (e.g., aluminum, copper alloys)
- Material codification follows AFCEN’s classification system (e.g., Mxxxx for base metals, Sxxxx for filler metals).
Chemical Composition & Mechanical Properties
- Defines acceptable ranges for:
- Chemical elements (C, Mn, Si, S, P, Cr, Ni, Mo, etc.)
- Mechanical properties (tensile strength, yield strength, elongation, impact toughness)
- Heat treatment conditions (annealing, quenching, tempering)
Inspection & Testing Requirements
- Mandatory tests depending on material class:
- Destructive testing (tensile, impact, hardness, bend tests)
- Non-destructive testing (NDT) (ultrasonic, radiographic, liquid penetrant, magnetic particle testing)
- Metallurgical examinations (grain size, microstructure)
- Frequency of testing (batch testing, sample size)
- Acceptance criteria (based on RCC-M and referenced standards)
Supplementary Requirements (if applicable)
- Additional tests for specific applications:
- Corrosion resistance tests (intergranular, pitting)
- High-temperature properties (creep resistance)
- Special NDT requirements (phased array UT, TOFD)
Certification & Documentation
- Material certificates must comply with EN 10204 (Type 3.1 or 3.2)
- Traceability records (heat number, melting process, manufacturing route)
Key Updates in Latest Version (RCC-M 2023)
- Alignment with EU regulations & international standards (e.g., harmonization with ASME BPVC)
- Inclusion of advanced materials (e.g., enhanced stainless steels for Gen III/IV reactors)
- Revised NDT acceptance criteria (more stringent defect evaluation)
- Updated annexures for welding consumables (filler metal specifications)
RCC-M Section II provides detailed material codes for metals used in nuclear components, classified by type (e.g., carbon steel, stainless steel, nickel alloys). Below is a summarized list of key material codes from the latest edition (RCC-M 2023).
1. Carbon and Low-Alloy Steels
Base Metals:
- M1901 – Carbon steel plates (e.g., P265GH, P295GH)
- M1902 – Carbon steel forgings (e.g., 20MnMoNi5-5)
- M1903 – Carbon steel tubes (e.g., TU42C, TU48C)
- M2131 – Manganese-molybdenum steel plates (e.g., 16MND5, 18MND5)
- M2132 – Manganese-molybdenum-nickel steel forgings (e.g., 16MND5, 20MnMoNi5-5)
Welding Consumables:
- SFA-5.1 – Carbon steel electrodes (e.g., E7018)
- SFA-5.5 – Low-alloy steel electrodes (e.g., E9018-G)
2. Stainless Steels
Austenitic Stainless Steels:
- M3201 – 18%Cr-10%Ni plates (e.g., Z2CN18-10, 304L)
- M3202 – 18%Cr-10%Ni forgings (e.g., Z2CN18-10)
- M3204 – 17%Cr-12%Ni-2%Mo plates (e.g., Z2CND17-12, 316L)
- M3301 – Stabilized grades (e.g., Z6CNT18-10, 321)
Martensitic & Ferritic Stainless Steels:
- M3401 – 12%Cr steels (e.g., Z12CN13, 410)
Welding Consumables:
- SFA-5.4 – Stainless steel electrodes (e.g., E308L, E316L)
- SFA-5.9 – Stainless steel filler wires (e.g., ER308LSi)
3. Nickel-Based Alloys
Base Metals:
- M4101 – Inconel 600 (NC15Fe)
- M4102 – Inconel 690 (NC30Fe)
- M4104 – Inconel 718 (NC19FeNb)
Welding Consumables:
- SFA-5.11 – Nickel alloy electrodes (e.g., ENiCrFe-3)
- SFA-5.14 – Nickel alloy filler wires (e.g., ERNiCr-3)
4. Aluminum & Copper Alloys
- M6101 – Aluminum alloys (e.g., 5083, 6061)
- M6201 – Copper-nickel alloys (e.g., CuNi30Mn1Fe)
5. Special Materials
- M5101 – Zirconium alloys (for fuel cladding)
- M5201 – Titanium alloys (for specific components)
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