Erfahrungs- und Forschungsbericht 2012 - Ensi

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Erfahrungs- und Forschungsbericht 2012 - Ensi

appeared obsolete and not to current PSI standard.

The presence of such old control components mostly

outdated, no more produced and seldom supported

lead to the decision of upgrading the LINX control

system to a state-of-the-art Programmable Logic

Controller (PLC) system that allow for more flexibility,

rapid support and easy user interface. The control

system was selected to allow for a quick live transfer

of the recorded data to a remote computer via

Ethernet connection. Finally, the control of the additional

components (valves, flow meters, pressure

transducers, pumps) installed for the new auxiliary

system will be directly implemented in the new LINX

control system. The design of the new control cabinet

and the associated electrical schema has been

done. The assembly of the different components

and the cabinet is currently ongoing. The new control

system should be completed by January 2013.

National Cooperation

The LINX project is carried out with the national participation

of ENSI. The ETHZ is the hosting institution

for the PhD program and provide the supervision

(Prof. Horst-Michael Prasser) as well as experimental

infrastructures for specific tasks (assessment/calibration

of IR technique using as reference ETHZ-developed

2-D liquid film sensors [4]).

International Cooperation

The LINX project benefits also from the participation

of IRSN (France), which provides support/review to

the overall project and in particular for the part related

to the development of a module of the numerical

ASTEC code for the modeling of condensation and

re-evaporation in the containment.

Finally, the research investigations addressing condensation/evaporation

in combination with liquid

film transport phenomena in a containment have

synergies with the ongoing EURATOM-ROSATOM

ERCOSAM-SAMARA projects (2010–2014), which

see the participation of several European, Russian,

Canadian and American Organizations and for

which PSI is the Project Coordinator, and with the

OECD/NEA HYMERES project which is going to be

conducted during the period 2013–2016. For the

latter, PSI and CEA are the two Operating Agents

and will perform ex-periments respectively in PANDA

and MISTRA facilities.

Assessment 2012 and

Perspectives for 2013

All the challenging research activities defined in the

LINX project for 2012 have been successfully completed

and therefore the project is progressing well.

The key modules for the experimental campaign

have been assessed and/or designed and purchased

and/or constructed. These are the Temperature

Controlled Plate, the related auxiliary system and

instrumentation, the optical access glass windows

for the NIR and MWIR measurements in LINX, the

upgrading of LINX control system including the new

modules for the TCP, the NIR and MIR cameras, the

light sources, etc. A measurement campaign at the

ICON facility at PSI using cold neutrons was also performed

in order to benchmark the NIR technique for

liquid film thickness measurements. This NIR technique

was recently assessed and calibrated, applying

the liquid film sensor technique developed recently

at ETHZ [4]. The time resolved measurements using

Wall Mesh Sensor and spatially resolved cold neutron

imaging provide useful complementary data for

validation of the novel NIR film thickness measurements

technique. In addition to its advantage to be

nearly non-intrusive, the NIR technique appears to

be the best compromise between space and time

resolution regarding characterization of thin films

on a vertical wall with natural convection. The review

of the module of the numerical ASTEC code

for the treatment of condensation in containment is

scheduled for the first trimester of 2013.

In 2013 an extended experimental campaign will be

performed in the LINX facility for the liquid film characterization

under the effect of condensation and

re-evaporation phenomena and applying a broad

range of initial and boundary conditions

It is also expected that the analysis of the results of

the measurement campaign carried on in 2012 at

ICON and ETHZ and those related to the experimental

campaign in 2013, will lead the Ph.D. student to

write further scientific publications.

Publications

An abstract entitled «Non intrusive near infrared

liquid water film thickness measurement technique

and 2-D Mapping» has been submitted to the 15 th

International Topical Meeting on Nuclear Reactor

Thermal Hydraulics (NURETH-15) that will take place

in Pisa in May 2013 [3]. A full description of the

measurement technique, its calibration procedure

ENSI Erfahrungs- und Forschungsbericht 2012 223

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