In November 2016 Sempell successfully finalized the factory acceptance tests of primary circuit control valves ZBS5, former Babcock type 346-626, for NPP Rovno and NPP Kozloduy. The valves will be installed in the TK80-system of these VVER10007320 reactors. The function of the ТК80 system is the coolant withdrawal from the primary circuit and it is composed of a regenerative heat exchanger TK80W01, bleed water subcooler TK80W02 and the control valves TK81S02 and TK82S02. The valves ТК81S02 and ТК82S02 are designed for the set coolant flow rate to be withdrawn from the primary circuit – “bleed” of the primary circuit. The valves ТК81S02 and ТК82S02 are also designed for the support of the set pressure by the change of bleed water flow rate through the valves during tightness pressure test of the primary circuit. The design pressure of the valves is 17,6 MPa, the design temperature is 350 degrees Celsius. The valve ensures a Kv = 4,6 m3/h and was adapted to demanding operation conditions with high differential pressures to be controlled. The valve is of bellow sealed type with Z-shaped body.
Forsmark 1, 2 and 3 will be equipped with an Independent Core Colling System. In case of an incident of ELAP – Extended Loss of ordinary AC Power or LUHS – Loss of normal access to Ultimate Heat Sink the reactor is feeded with water from an external tank to keep the reactor core cooled and covered with water
Sempell GmbH was awarded to deliver the Internal and External Isolation Valves for this application. The valves will be designed acc. to KBM/TBM ed. 7.0, Safety class 1 and Seismic Category 1.
The Internal and External Isolation valves are installed in series on the downstream side to avoid reversal flow. The Internal Containment Isolation Valve is a check valve type HKS5. The External Containment Isolation Valve is a check valve Type ZBS51 with blocking stem and electrical Actuator.
Sempell was recently awarded the contract for the supply of equipment to Fangchenggang Nuclear Power Plant unit 3 and 4 in China. It is one of the first commercial reactors of type Hualong-1 (Dragon-1; HPR1000) based on a three-loop design. In August 2014 the National Nuclear Security Administration of China classified the design as a Generation III reactor design, with independently owned intellectual property rights.
The scope of supply for Sempell GmbH includes 6 Pressurizer Safety Relief Valve Stations (PSRV) for the primary circuit and 6 Main Steam Relief Isolation Valve Stations (MSRIV) for the secondary circuit. Both valves systems are medium-operated and are subject to highest requirements for safety, reliability and quality. Sempell has many years of experience with these design applications and their operation in NPPs in Europe, Asia and South America within different types of reactors. The applied MSRIV design was already successfully supplied for NPP Taishan of EPR type in China, now in the commissioning phase for unit 1.
In addition, the company Griss in France, another supplier within our nuclear group, received the order for the Main Steam Safety Valve (MSSV) for the secondary circuit, dedicated to secondary circuit overpressure protection. This is a spring-loaded safety relief valve which will be installed in one system together with the MSRIV.
The success with the Fangchenggang project is a major step for our company in order to strengthen our position in the nuclear market in general. In particular, this success strengthens our position as a reliable supplier for the latest reactor generation designed in China not only for the Chinese but also for export market.
Sempell GmbH was awarded with an order for a comprehensive spare part package, thanks to the good cooperation with IPU International GmbH. The spare parts are for the pressurizer safety relief valves delivered by Sempell and for several control valves, isolation valves and gate valves e.g. type “Eldidor 2000” delivered by the Deutsche Babcock AG in 1985 and 1986.
The valves are installed in the primary circuit and are designed for the most severe operation parameters under consideration of accident conditions. Therefor the refurbishment of these valves is necessary to ensure reliability and safe operation.
To extend the lifetime of the valves delivered by Babcock / Sempell the spare part package includes:
- new pilot valves type VS66 for the pressurizer safety relief valve
- solenoids for pilot valves for the pressurizer safety relief valve
- bodies for the pressurizer safety relief valves
- bellow seals for control and isolation valves
- actuators for isolation valves
- wedge packages for gate valves
- and other wear and spare parts
The NPP Paks will replace several safety valves. The safety valves will be replaced in the following systems of the NPP:
- Cooling water system (VX, VW, VY and TF system)
- Low pressure nitrogen system (TP system)
- Steam Generator Blow Down (VD, RN system)
Sempell GmbH was awarded for the contract to deliver these valves. The scope of supply includes spring-loaded safety valves type VSE2 and proportional spring-loaded safety valves type PSE2. The safety valves will be designed with a special disc and body seat for the application with fluids.
Mitsubishi Hitachi Power Systems Europe (MHPSE) and consortium partner Polimex-Mostostal (PXM) are building the coal-fired power plant Kozienice 11 in Poland. The end-user is the Polish energy supplier ENEA Wytwarzanie.
The plant is designed for an installed capacity of 1,075 MW and a 45.59% net efficiency. It is planned for the power plant to go into operation in 2017, at which time it will rank among the most efficient of its type in the world.
Sempell has received orders for the boiler, turbine and balance-of-plant portion for various valves types:
- Sempell high-pressure isolation gate, globe and check valves
- Sempell control valves, both electric and pneumatic-controlled
- Narvik-Yarway desuperheater systems
- Sempell and Dewrance extraction check valves
Due to the variety of valve designs, Pentair was able to offer a perfectly suited solution for all applications.
A special highlight of these orders was the combination of different check valve designs for the turbine package which complies with the requirements for such challenging installation and operating conditions.
Sempell was awarded by AREVA GmbH in Erlangen contracts to supply the valves for the Angra 3 project in Brazil.
AREVA has signed a contract with the Brazilian electric company Eletrobras Eletronuclear for the completion of the construction for the Angra 3 reactor located in the state of Rio de Janeiro. Sempell was also the key supplier for safety-related valve applications for Angra 2 (in service since 2000).
The construction of Angra 3 began in 1984 and was stopped after two years; around 70% of the equipment is on site. Angra 3 was designed to be a duplicate of unit 2. Therefore Sempell was one of the key suppliers for safety-related valve applications at this construction stage.
In 2006 the project to construct Angra 3, a 1,405 MWe pressurized water reactor, was restarted by the Brazilian government to meet the country’s growing energy needs and to balance the energy mix.
The current contracted scope of supply between AREVA and Sempell includes the following valve types:
- Pilot-operated pressurizer safety valves
- Solenoid pilot valves for the completion of the already delivered Sempell pilot operated Main Steam Valve Set. The MSVS consists of the Main Steam Isolation Valve (MSIV), the Blow Down Isolation Valves (BDIV), the Main Steam Safety Valve (MSSV) and an isolation valve in front of the MSSV.
- Isolation valves for the Emergency Core Cooling System
- Spring-loaded safety valves
- Lockable check valves
- Rupture discs
The contracted scope is an indication for the huge product range Sempell offers for the nuclear market and emphasizes the leading position Sempell has in this segment.
Sempell GmbH has received an order for four motor operated gate valves, DN150, for the NPP Forsmark 1 + 2. The high pressure containment isolation valves, type GPS5, will be installed at the shutdown cooling system. The approved GPS5 design with cobalt-free hardfacing closes reliably under pipe rupture conditions. The functional performance of the GPS5 gate valve design was qualified by blow-down tests at the Siemens KWU (today AREVA) full-scale valve test rig in Karlstein under pipe rupture conditions.