- Delta Mobrey has served the nuclear industry in the UK since the first nuclear reactors were designed and built over 55 years ago.They have provided instruments across all the UK Nuclear Fleet including Magnox, AGR, PWR and DFR and PFR.
- Delta Mobrey has also worked in the worldwide nuclear industry for over 40 years with projects in China, Sweden, Finland, South Korea, the USA, Canada, India and Spain on PWR, BWR and CANDU reactor types. Their products are used within containment, in the nuclear island, in safety shut down applications, critical areas of process control, alarm and general process monitoring.
- Product Qualification : Delta Mobrey’s products meet the RCC-E and IEEE Class 1E requirements for seismic and radiation endurance. Tests details are available and are also summarised in the Instrumentation for Nuclear Applications.
- Bespoke products : Delta Mobrey have also developed bespoke products for our customers whenever a technical solution cannot readily be found ‘off the shelf’.
- Deal directly with their team of engineers as they are ready to discuss your exact requirements to ensure that the product you need for your application is correctly specified and supplied.
200 Series
Pressure Switch
- Qualified Harting 7D, EGS QDC and Souriau connectors available
- Delta Mobrey Microswitch tested to meet requirements of RCC-E K2
Best in class accuracy of ± 0.5%
- FEP and EPDM seals and gaskets suitable for exposure to radiation
- Weatherproof and Flameproof models Ex d IIC - ATEX
- Ranges available up to 75 Bar (1,000 psi)
- Models for fixed and adjustable switching differential
- Safety vented or blow out device as standard
300 Series
Differential Pressure Switch
- Qualified Harting 7D, EGS QDC and Souriau connectors available
- Delta Mobrey Microswitch tested to meet requirements of RCC-E K2
Best in class accuracy of ± 1%
- Weatherproof and Flameproof models Ex d IIC - ATEX
- Static pressure up to 250 bar (3500 psi)
- Models for fixed and adjustable switching differential
- Safety vented or blow out device as standard
588 Series
Gas Flow Transmitter / Switch
EMPHASIS Assessed – Smart Instrument
- For use in a variety of applications in the nuclear industry where positive measurement of air flow is critical for plant and personnel safety.
- The latest variant of the Flow Transmitter has an integrated switch for simple alarm applications.
The Transmitter is SIL 1 level certified
- Flow rates from 0.8 m/s up to 38.5 m/s
Delta Switches undergoing radiation testing
- A number of the switches were exposed to a Total Integrated Dose (TID) of 17.82MRads at a rate of 0.25MRads/hr using Cobalt 60 gamma rays to achieve the end-of-life condition expected after being exposed to both normal and accident conditions.
- Other switches were exposed to a TID of 27.5MRads.
LOCA / HELB Accident Simulation
- Following the aging programme and the seismic tests, the products were subjected to a HELB (High Energy Line Break) / LOCA (Loss of Coolant Accident) simulation. This exposed the products to 173°C superheated steam for 3 hours at 550KPa and 160°C for 6 hours and 24 hours at 120°C with saturated steam.
Seismic Qualification
- In separate test programmes Delta’s products were seismically tested using the random multi-frequency (RMF) test requirements of Standard IEEE 344-1975/1987 and were subjected to tri-axial RMF test levels as shown below, and also to the spectra as defined in the RCC-E Code
Nuclear Product Qualification
Bespoke Instruments
- Specially engineered Differential Pressure switch incorporating Chemical seals with flushing ports and small deadband for use in Nuclear Power Plant.
- The complexity of special engineering can vary from a simple change in process connection to a completely re-designed product to meet specific performance criteria.
MicroSwitches
Delta Mobrey’s own design of
hermetically sealed microswitches
has been tested and passed the
DBE LOCA event after thermal and
radiation aging.
Connectors
A number of different connectors have been tested on our products including the Harting 7D, the Souriau 8N45S and the EGS Quick Disconnect Connector [QDC].
Wires
All wires used are Habia with radiation resistant sleeving.
Housings
Delta Mobrey’s all stainless
steel construction provides the highest quality enclosures for all
the Nuclear Qualified products.
Delta Mobrey offers a comprehensive range of qualified and tested pressure,
temperature, level and flow measuring instruments for the nuclear industry
Nuclear Pressure Instruments
- More than 1,000,000 instruments sold world-wide
- Sales in more than 50 different Countries
Your Trusted Partner
in Process Instrumentation
