0

Full Content is available to subscribers

Subscribe/Learn More  >

Commissioning of CIRCE Facility for SGTR Experimental Investigation for HLMRs and Pre-Test Analysis by SIMMER-IV Code

[+] Author Affiliations
Alessio Pesetti, Nicola Forgione

University of Pisa, Pisa, Italy

Mariano Tarantino, Piero Gaggini, Giuseppe Polazzi

ENEA CR Brasimone, Camungano, Italy

Paper No. ICONE25-67419, pp. V005T05A039; 9 pages
doi:10.1115/ICONE25-67419
From:
  • 2017 25th International Conference on Nuclear Engineering
  • Volume 5: Advanced and Next Generation Reactors, Fusion Technology; Codes, Standards, Conformity Assessment, Licensing, and Regulatory Issues
  • Shanghai, China, July 2–6, 2017
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-5783-0
  • Copyright © 2017 by ASME

abstract

In the framework of the European Commission MAXSIMA project, a large-scale test section, aiming to experimentally investigate the Steam Generator Tube Rupture (SGTR) postulated event, in a relevant configuration for Gen IV MYRRHA reactor, was implemented in the large pool CIRCE facility at ENEA CR Brasimone. The test section is mainly composed by four tube bundles of 31 tubes. Each one of which constitutes a full scale portion of the tube bundle of the Primary Heat eXchanger (PHX) of MYRRHA plant. The bundles are set in 6 inch tubes with a lower and upper tube plate, absolving structural tasks. Water flows upwards in the central tube at 200°C, 16 bar and about 0.1 kg/s, the first rank of six tubes is pressurized at 16 bar by argon for feedbacks on possible domino effect and the outer ranks are composed by opened tubes at the lower and upper end. Lead Bismuth Eutectic alloy (LBE), at 350°C under a cover gas of argon at about 1 bar, flows downwards shell side of the bundle, pushed by a pumping system composed by centrifugal and jet pumps connected in series, for reaching about 80 kg/s. Water tube is fed by external tank and supply line. Two regulation valves and one isolation valve are set for water pressure and mass flow rate regulation and interruption, respectively. Reached the water and LBE stationary conditions of MYRRHA PHX, in terms of pressure, temperature and mass flow rate, the central water tube is pulled upwards by an external hydraulic jack, realizing the tube rupture. Its position is well defined on the tube by a notch worked with machine tools. Four SGTR tests are foreseen to be carried out, one at a time, in the four tube bundles, excluding the necessity to extract the test section from CIRCE main vessel after each test. This paper presents the overall components implemented for carrying out the tests. In particular, the assembling of the whole test section, gas line for pressurizing the water tank and supply line and depressurization line of CIRCE cover gas. It discharges into a 1500 L tank, for collecting possible discharged LBE particulate. The Data acquisition and Control System (DACS) is realized in LabVIEW environment. It allows the remote control of the facility during the preparation phases, tests execution and safe shutdown. PID controllers are implemented for water heating and pressurization and water and LBE mass flow rate regulation. The main commissioning tests carried out and acquired variables by DACS, aiming to check the suitable functioning of all components, are presented. The pre-test numerical analysis of the SGTR experiments in CIRCE facility is performed by 3D Cartesian SIMMER-IV code. The obtained results show that the developed model is able to reach the initial condition of the tests in agreement with MYRRHA stationary conditions. Once reached, the water injection into LBE pool was numerically simulated. The pressure in CIRCE cover gas increased up to the opening rupture disk value of 6 bar in about 10 s, providing a grace period more than enough for carrying out the tests (3 or 5 s) in safe conditions.

Copyright © 2017 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In