ECTHOR Loop Seal (Air/Water) (SET facility)

CCVM Key:

3.16

Country:

France

Organization:

CEA - Commissariat à l'énergie atomique

Operating years:

Reference reactor:

Westinghouse PWR ;; FRAMATOME PWR

Availability:

Objectives:

To derive correlations for the two-phase flow modeling in the CATHARE code. Basic investigations are the flow phenomena (stratification, countercurrent flow) mainly in horizontal pipes (hot leg and pump seal) under conditions of small break LOCAs.

Pictures:

Main characteristics

Height scale:1

Experimental conditions

Test details:

Performance 1. - Introduction of water into the U-tube up to a certain level - Start of the blower and introduction of a defined air flow rate. - Start of data acquisition - Waiting until variations of the resulting flow pattern are diminished - Blower turnoff and performance of measurements Performance 2. - Start of the blower and establishing a defined air flow rate. - Introduction of water at the bottom of the horizontal U-tube section until water entrainment is observed. - Waiting until the entrainment stops. - Measurement of data. - Blower turnoff and conductance of further measurements.

Pressure min:0.101 MPa

Pressure max:0.101 MPa

Temperature min:20 °C

Temperature max:20 °C

Facility geometry

Keywords General:

Full Height

Keywords Others:

Pipe

Components details:

Comparative Assessment of ATHLET and CATHARE Two Phase Stratified Flow Models by means of the ECTHOR Loop Seal Tests

References

Schaffrath, A, et al., ATHLET code verification by ECTHOR loop seal experiment

https://inis.iaea.org/search/search.aspx?orig_q=RN:25034501
Verification of the two-phase stratified-flow model in athlet by separate effect tests

https://www.sciencedirect.com/science/article/pii/0029549394008967
Framatome Report EP/TA/DC/533, June 1985.

Phenomena

Relevance	Phenomenon
50%	Counter Current Flow Limitation (CCFL)
100%	Loop Seal Phenomena (CL)
50%	Stratification in horizontal pipes