Seismic Testing For Nuclear Power Stations

French test house invests in shaker table designed specifically for performing seismic testing for nuclear power equipment.


n 2017, French test house Environne’Tech, part of the Emitech Group, began the “Bourgoin- Jallieu 2020” industrial

project involving the provision of an extension to its test centre for equipment qualification and environmental testing. The new 800m2

building is 10m high

and designed for testing large- volume specimens such as aeronautic or rail components, as well as complete vehicles or major installations. It is equipped with special facilities such as a 93m3

❱ ❱ Large seismic testing table serves the increasingly stringent environmental testing requirements of the nuclear power industry


chamber and a large-volume seismic table that is the most recent addition to the existing equipment. With the “grand carénage” national nuclear plant refurbishment programme being orchestrated by EDF, and after the accident at Fukushima in Japan, demand for seismic testing has grown considerably and specifications in many areas of the industry have been tightened. In response to this trend, Environne’Tech decided to invest in equipment specifically for this purpose. The “great refit” programme will involve the extension of the useful life of existing nuclear facilities in France and will come under the spotlight for safety and reliability.

SEISMIC TEST TABLE Compared to Environne’Tech’s existing table, the new seismic table has up to five times the test capacity and can handle heavier test specimens and ones which occupy more volume. The new table for component qualification measures 1200 x 1200mm. The seismic table excites two axes simultaneously with a force of up to 150kN and accepts a maximum payload of 3000kg for the total spectrum and 500kg for the component spectrum. It is designed for all types of equipment which have to remain functional before

and after an earthquake. In the case of the nuclear power industry, this includes power station safety equipment, control devices, racks, sensors, connectors, lighting, taps and valves. It also serves the needs of other markets which are subject to multi-axial stresses, such as the automotive, rail and aircraft industries. The capabilities of the new table complement those of the existing one. The tables make it possible to implement complex hydraulic interdependencies (pressurising and/or fluid circulation) or electrical interdependencies (connection and monitoring of voltages, currents, temperatures, short-term power failures, etc.) and to control this by means of different sensors (acceleration, movement, stress etc.). The devices are tested under real operating conditions. As well as doubling the test capacity, the addition of a second seismic table provides Environne’Tech’s customers with more flexibility for their test campaigns. This makes the service faster, with a considerable reduction in lead times. n

20 /// Climatic & Vibration Testing 2018 Vol 1 No. 2

Climatic & Vibration Testing Vol 1 No. 2


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