Delta Mobrey offers a comprehensive range of qualified and tested pressure,
temperature, level and flow measuring instruments for the nuclear industry
Delta Mobrey has served the nuclear industry in the UK since the first nuclear reactors were designed and built over 55 years ago.
A specialist in pressure, temperature, level and flow sensors, Delta Mobrey has provided a range of generic and bespoke instruments to the industry 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. Our products are used within containment, in the nuclear island, in safety shut down applications, critical areas of process control, alarm and general process monitoring
Instrumentation used in Nuclear Power Plant may be required to survive seismic and radiation exposure of different severity levels depending on the location in the plant and the application. 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 Brochure available as a download here. Many products also meet SIL 2 requirements and numerous international Hazardous Area approvals
Delta Mobrey have also developed bespoke products for our customers whenever a technical solution cannot readily be found ‘off the shelf’. Our team of Engineers is ready to discuss your exact requirements to ensure the product you need for your application is correctly specified and supplied
Delta Mobrey has optimised the design of this product to react very
quickly to temperature change and can provide fast early warning of
possible problems in the plant. This model consists of a
sensing element manufactured from thin walled copper tube
filled with a volatile fluid. By keeping the length to diameter ratio high,
the surface area of the sensing element is maximised achieving a
faster response to temperature changes than more traditional types.
Qualified Harting 7D, EGS QDC and Souriau connectors available
Hermetic Microswitch tested to meet requirements of RCC-E K2
Best in class accuracy of ± 0.5%
Set point ranges up to 300°C (580°F)
Rigid and semi-rigid thermal system options
FEP and EPDM seals and gaskets suitable for exposure to radiation
Weatherproof and Flameproof models Ex d IIC - ATEX
Precision stainless steel mechanism for arduous atmospheres
and high humidity
Set point adjustable over whole range against calibrated scale
with tamperproof adjustment
Safety vented or blow out device as standard
Air Flow Transmitter / Switch
EMPHASIS Assessed – Smart Instrument
The 588 Series of Flow Transmitters and Switches have been used in a variety of applications in the nuclear industry including HVAC systems and other air flow ducting where positive measurement of Flow is critical for plant and personnel safety.
The 588 has also undergone EMPHASIS Assessment for use in the UK Nuclear Industry.
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 and up to 38.5 m/s
Small bore diameter flow transmitters are also available
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.
LOCA/HELB Accident Simulation
Following the aging programme and the seismic tests the products
were subjected to a HELB (High Energy Line Break) / LOCA.
This exposed the products to 173°C superheated steam
for 3 hours at 550KPa abs, and 160°C for 6 hours and
24 hours at 120°C with saturated steam.
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