The PIPER-ONE facility simulated a General Electric BWR-6 plant. It is characterized by volume and height scaling ratios of 1/2200 and 1/1, respectively. The available core rod electrical power (20% of the nominal value) is sufficient to simulate the nuclear heat decay. No circulation loops are included in the facility, considering their low importance in a small break LOCA and the willingness to achieve the maximum simplicity of the loop operation.
Facility is dismantled.
CERTA-TN
Also attached you may find information of CERTA - TN: European Thematic Network for the Consolidation of the Integral System Effect Experimental Databases for Reactor Thermal-Hydraulic Safety Analysis in which UNIPI participated with the PIPERONE Facility data and that was the origin to the development of the first version of the STRESA Database.
Some other public documents:
https://arhiv.djs.si/proc/port1995/1458.pdf
https://www-pub.iaea.org/MTCD/Publications/PDF/te_872_web.pdf