Baoji Dingding titanium | nuclear grade TA2 titanium nickel tilting evaporation pot independently researched and developed CNNC

In the core links of nuclear fuel reprocessing, radioactive waste liquid treatment and nuclear chemical raw material purification, the evaporation pot, as the "key equipment for material concentration", needs to meet the three hard requirements of "nuclear grade corrosion resistance, safety and controllability, and high-efficiency adaptation". The traditional stainless steel evaporation pot is prone to corrosion and leakage in fluorine and acid containing radioactive media, and there is a risk of radioactive pollution. Baoji Dingding titanium successfully launched the nuclear grade TA2 titanium nickel tiltable evaporation pot by relying on its full chain independent R&D and production capacity and controlling the whole process from drawing design, nuclear grade material selection, process research and development to welding manufacturing. Relying on the advantages of "China Titanium Valley" nuclear grade materials and precision manufacturing technology, the products strictly comply with gb/t 23711 (nuclear grade titanium), gb/t 21652 (nuclear grade nickel) and HAF003 nuclear safety regulations. Through the process of "integral welding+seamless forming+tilt mechanism optimization", the corrosion rate is ≤ 0.0001mm/year, and the tilt angle is adjustable from 0 to 90 °. The products have passed the nuclear grade equipment qualification certification of China National Nuclear Corporation, and serve the key units such as China National Nuclear 404 and China National Nuclear construction nuclear fuel.

1、 Core competitive advantage: nuclear grade titanium nickel material to solve the pain point of extreme working conditions

Aiming at the core problems of "radioactive medium corrosion, residual material discharge, and limited operating space" in the field of nuclear and chemical industry, the nuclear grade titanium nickel composite material and tiltable structure form an exclusive advantage system, achieving a qualitative breakthrough compared with traditional equipment:

Nuclear material safety assurance

The main body adopts TA2 (nuclear grade pure titanium)+N6 (nuclear grade pure nickel) composite structure. The titanium layer is resistant to strong acid and alkali corrosion and the nickel layer is resistant to fluoride corrosion; It meets the requirements of gb/t 23711 class I nuclear grade, the dissolution rate of radioactive elements is ≤ 1 × 10 ⁻¹⁰g/cm ² · h, there is no risk of secondary pollution, and the material selection and performance optimization are independently completed by our company.

Full angle inclined discharge

The tilting mechanism is hydraulically driven, the tilting angle is stepless adjustable from 0 to 90 °, and the tilting speed is 0.5 °/s; the bottom of the pot is flush with the discharge port, and the residual amount of material is ≤ 0.1%, which solves the problem of radioactive material residue.

Extreme corrosion resistance and stability

The corrosion rate in the mixed medium of 20% nitric acid and 5% hydrofluoric acid is ≤ 0.0001mm/year; The working temperature is -20 ℃~250 ℃, and the pressure is 0.1-1.6mpa, meeting the concentration requirements of nuclear and chemical industry under multiple working conditions.

Nuclear safety design

Equipped with dual pressure interlock, temperature overrun alarm and radioactive leakage monitoring interface; The surface of the boiler body is coated with anti radiation coating, which meets the radiation protection standard of GB 18871 and ensures the safety of operation.

2、 Nuclear level specification system: accurately adapt to the full scene requirements of CNNC

In combination with the requirements of CNNC in different scenarios such as nuclear fuel treatment, radioactive waste treatment, nuclear chemical raw material purification, etc., the parameters of nuclear grade titanium nickel tilting evaporation pot are customized, covering the full range of 0.5-50m ³ of volume:

CNNC customization service: relying on the independent ability of the whole chain, it supports the independent completion of the detailed design of drawings (autocad/proe format output) and the research and development of special-shaped evaporation pots according to the requirements of CNNC group; TA2 nuclear grade titanium can be used as self-developed stabilization treatment process (eliminating stress corrosion), and N6 nickel material can provide customized solid solution strengthening; It is equipped with a special radioactivity monitoring interface for CNNC and is compatible with the existing radiation monitoring system; Independent service from nuclear level installation and commissioning (in accordance with HAF003) to safety acceptance, without relying on external technical support; The emergency repair order will complete the delivery of core components within 30 days to meet the continuous operation requirements of nuclear facilities.

3、 Core application case: serving the key projects of CNNC

1. CNNC 404 nuclear fuel reprocessing project: acid resistant evaporation concentration

The concentration of uranium containing nitric acid solution in nuclear fuel reprocessing requires excellent corrosion resistance and low residue, and the titanium nickel composite evaporation pot is accurately adapted:

-A 10m ³ ta2+n6 composite evaporation pot is provided for CNNC 404. The whole process from drawing optimization, material selection to welding and manufacturing is independently completed by our company. It is used for enriching uranium containing nitric acid solution. It runs continuously in 20% nitric acid medium for 180 days without corrosion, and the corrosion rate is only 0.00006mm/year, which is far better than the 0.001mm/year standard required by CNNC;

-The 0-90 ° inclined discharge design makes the residual uranium solution ≤ 0.08% and reduces the loss of radioactive materials; The equipped dual pressure interlock system triggered shutdown within 1s in case of abnormal pressure to avoid radioactive leakage, and won the title of "safety demonstration equipment" of the project.

2. radioactive waste liquid treatment project of a nuclear power plant: mixed acid corrosion resistance concentration

The radioactive waste liquid of nuclear power plant contains nitric acid and hydrofluoric acid, which has strict requirements on the corrosion resistance of the evaporation pot. The evaporation pot with titanium nickel lining is outstanding:

-A 30m ³ TA2 lined N6 evaporation pot is provided for the project. The core welding process uses the nuclear grade titanium nickel welding technology independently developed by our company to treat fluorine-containing radioactive waste liquid. The evaporation capacity reaches 3t/h, and the corrosion rate in nitric acid+hydrofluoric acid mixed medium is ≤ 0.0001mm/year, which is 3 times longer than the traditional Hastelloy evaporation pot;

-Inclined discharge combined with vacuum concentration technology can reduce the volume of waste liquid to 1/10 of the original volume and reduce the cost of subsequent solidification treatment by 40%; The leakage monitoring interface is seamlessly connected with the existing radiation monitoring system of the nuclear power plant to achieve real-time safety monitoring.

3. nuclear fuel fluoride salt purification project of CNNC: fluoride corrosion resistance evaporation

Fluoride corrosion resistance is required for purification of nuclear grade fluoride salts, and N6 nuclear grade nickel evaporation pot meets the requirements:

-Provide a 5m ³ N6 nuclear grade nickel+ta2 titanium flange evaporation pot for China Nuclear Power Construction Corporation. The flange connection structure is independently designed by our company for the concentration and purification of lithium fluoride solution. The fluoride corrosion resistance rate at 200 ℃ working temperature is ≤ 0.00005mm/year, and the purity of lithium fluoride product is increased from 99.5% to 99.99%, meeting the nuclear fuel grade standard;

-The hydraulic tilting mechanism is easy to operate, suitable for the narrow space of the workshop, and the discharge time is 60% shorter than that of the fixed evaporation pot, which improves the production efficiency. It has been running for 2 years without failure and has become the core equipment of the fluoride purification production line.

4、 Nuclear quality assurance: full chain compliance from R&D to operation and maintenance

1. independent control of nuclear grade raw materials: TA2 nuclear grade titanium raw materials are independently purchased and rechecked by our company according to nuclear grade standards, which meet the requirements of gb/t 23711 class I, and N6 nuclear grade nickel meets the standard of gb/t 21652. Each batch of raw materials is attached with a nuclear grade material report and traceability source code issued by ourselves, which has passed the review of CNNC raw materials;

2. the whole process of independent manufacturing process: the whole process of independent control from drawing design, process planning to production and manufacturing is carried out in the ISO 14001 environmental system workshop. The hidden dangers are eliminated by "vacuum melting+integral welding", and the insulation cotton filling and mixing shaft design are adopted; Electrochemical polishing and anti radiation coating are applied on the surface to meet the requirements of nuclear cleanliness;

3. independent nuclear level testing and verification: it has an independent nuclear level equipment testing laboratory, which has passed the independent hydrostatic test (1.5 times the rated pressure), air tightness test, corrosion test (simulated nuclear chemical medium immersion), nondestructive testing (ut/mt/pt+eddy current testing, no internal defects), and radioactive dissolution test; It has passed the acceptance test of nuclear equipment of CNNC (in accordance with HAF003);

1. nuclear level service support: it is equipped with a nuclear level equipment service team to provide installation and commissioning (full participation of CNNC Engineers), radiation protection training, and regular operation and maintenance testing; Establish a 24-hour emergency response mechanism to arrive at the site within 48 hours in case of nuclear facility failure to ensure safe operation.

Baoji Dingding titanium: CNNC's trusted partner in nuclear equipment

The company has been developing and producing the whole chain of nuclear grade titanium nickel equipment for 12 years, with an annual output of 200 sets. From drawing design, material research and development, process innovation to welding manufacturing, inspection and acceptance, the whole process is self controllable. It has passed the ISO9001 quality management system and obtained the qualification of "qualified supplier" of CNNC group. Relying on the three advantages of "full chain autonomy, nuclear compliance, corrosion resistance and stability", it has become the core partner of CNNC nuclear chemical equipment.

Core advantage: full chain autonomy+ta2 nuclear Titanium Technology

Compliance assurance: CNNC supplier qualification

Scheme consultation: send CNNC project working condition+demand to 530975155@qq.com Provide nuclear level adaptation scheme within 4 hours