1,720,968 research outputs found
TIES:IL MODELLO DI TRAFFICO IN SITUAZIONI DI EMERGENZA SVILUPPATO PER IL SISTEMA HARIA 2
No full textEvaluation of code accuracy in the prediction of OECD CSNI ISP 21 performed in PIPER-ONE apparatus, OECD CSNI 2nd Workshop on ISP 21, Calci (I), Apr. 13-14, 1989
No full textFollowing the ISP [see below for acronyms] proposal made by UNIPI to OECD/NEA/CSNI in 1985[proposal given below under quotation] and the first ISP 21 Workshop held in Marina di Grosseto, 1986, the second and final Workshop for the international activity was held in Calci (Pisa geographical region) in 1989.
“The document deals with the proposal made by UNIPI to the OECD/NEA/CSNI (Organization for Economic Cooperation and Development / Nuclear Energy Agency / Committee on the Safety of Nuclear Installations) to perform an International Standard Problem (ISP), which was, later on, called ISP 21. This was at the time the first ISP proposed by Italian Institutions dealing with an Integral Test Facility (ITF). ISP 21 was a Small Break Loss of Coolant Accident (SBLOCA) scenario expected to occur in Boiling Water Reactors. One key feature of the proposed experiment was its Counterpart-Test feature which allowed the comparison with similar experiments performed in the FIST facility (available in US, San Jose, General Electric) and the ROSA-III facility (available in Japan at the JAERI research center of Tokai-Mura).
The proposal was accepted and the ISP activity went on in the period 1985-1989. (Later) comparison between experimental scenarios in the three ITF PIPER-ONE, ROSA-III and FIST largely contribute to addressing the scaling issue which was controversial in nuclear thermal-hydraulics.
PIPER-ONE was a Boiling Water Reactor (BWR) simulator installed at the Scalbatraio Laboratory managed by Dipartimento di Costruzioni Meccaniche e Nucleari (DCMN, now DICI) of University of Pisa.”
Four reports are part of this collection.
This report (4 of 4) discusses the application of the FFTBM (Fast Fourier Transform Based Method developed at UNIPI since a few years) to the comparison between PIPER-ONE experiment at the basis of ISP 21 and calculated data by each participant in the activity. In this way a hierarchy of quality of calculation was made.
The activity (among the other things) allowed UNIPI understanding of the capabilities of international Institutions in predicting accident scenarios in NPP
LA SIMULAZIONE DELL'EVACUAZIONE DELLA POPOLAZIONE IN SITUAZIONI DI EMERGENZA CON IL SISTEMA HARIA 2
No full text
SVILUPPO DELLA NUOVA MODELLISTICA PER LA SIMULAZIONE DI INCIDENTI INDUSTRIALI INSERITA NEL SOFTWARE HARIA 2, VERSIONE 3.0
No full textNUREG/IA 0135 - Post-Test Analysis of PIPER-ONE PO-IC-2 Experiment by RELAP5/MOD3 Codes
No full textRELAP5/MOD3.1 was applied to the PO-IC-2 experiment performed in PIPER-ONE facility,
which has been modified to reproduce typical isolation condenser thermal-hydraulic conditions.
RELAP5 is a well known code widely used at the University of Pisa during the past seven years.
RELAP5IMOD3.1 was the latest version of the code made available by the Idaho National
Engineering Laboratory at the time of the reported study. PIPER-ONE is an experimental facility
simulating a General Electric BWR-6 with volume and height scaling ratios of 1/2200 and lI,
respectively. In the frame of the present activity a once-through heat exchanger immersed in a
pool of ambient temperature water, installed approximately 10 m above the core, was utilized to
reproduce qualitatively the phenomenologies expected for the Isolation Condenser in the
simplified BWR (SBWR). The PO-IC-2 experiment is the flood up of the PO-SD-8 and has been
designed to solve some of the problems encountered in the analysis of the PO-SD-8 experiment.
A very wide analysis is presented hereafter including the use of different code versions
PIPER-ONE research: experimental data report of PIPER-ONE test PO-SB-7, OECD CSNI 2nd Workshop on ISP 21, Calci (I), Apr. 13-14, 1989
No full textFollowing the ISP [see below for acronyms] proposal made by UNIPI to OECD/NEA/CSNI in 1985[proposal given below under quotation] and the first ISP 21 Workshop held in Marina di Grosseto, 1986, the second and final Workshop for the international activity was held in Calci (Pisa geographical region) in 1989.
“The document deals with the proposal made by UNIPI to the OECD/NEA/CSNI (Organization for Economic Cooperation and Development / Nuclear Energy Agency / Committee on the Safety of Nuclear Installations) to perform an International Standard Problem (ISP), which was, later on, called ISP 21. This was at the time the first ISP proposed by Italian Institutions dealing with an Integral Test Facility (ITF). ISP 21 was a Small Break Loss of Coolant Accident (SBLOCA) scenario expected to occur in Boiling Water Reactors. One key feature of the proposed experiment was its Counterpart-Test feature which allowed the comparison with similar experiments performed in the FIST facility (available in US, San Jose, General Electric) and the ROSA-III facility (available in Japan at the JAERI research center of Tokai-Mura).
The proposal was accepted and the ISP activity went on in the period 1985-1989. (Later) comparison between experimental scenarios in the three ITF PIPER-ONE, ROSA-III and FIST largely contribute to addressing the scaling issue which was controversial in nuclear thermal-hydraulics.
PIPER-ONE was a Boiling Water Reactor (BWR) simulator installed at the Scalbatraio Laboratory managed by Dipartimento di Costruzioni Meccaniche e Nucleari (DCMN, now DICI) of University of Pisa.”
Four reports are part of this collection.
This report (1 of 4) discusses the PIPER-ONE experiment at the basis of ISP 21 (experimental data were supplied to ISP participants after their submission of calculated results).
The activity (among the other things) allowed UNIPI understanding of the capabilities of international Institutions in predicting accident scenarios in NPP
PIPER-ONE Research: the experiment PO-SD-8 related to the evaluation of the Isolation Condenser performance. Post-test analysis carried out by RELAP5/MOD3-/7j Code
No full textPIPER-ONE was a Boiling Water Reactor (BWR) simulator installed at the Scalbatraio Laboratory managed by Dipartimento di Costruzioni Meccaniche e Nucleari (DCMN, now DICI) of University of Pisa.
PIPER-ONE was designed and constructed after the Three Mile Accident in 1979 to better understand Small Break Loss of Coolant Accident (SBLOCA) scenarios in Boiling Water Reactors (BWR). A dozen experiments were performed, including the experiment at the basis of the International Standard Problem (ISP) 21 in relation to which some information is given below.
PO-SD-8 is a Natural Circulation experiment scenario expected to occur in Simplified Boiling Water Reactors (SBWR) where the use of the Isolation Condenser (IC) is foreseen by design in case of accident. The present experiment aims at identifying the capabilities of PIPER-ONE in performing this type of test and at proving the quality of the design of the installed IC
Piper-one Research: overview of the experiments carried out and lesson learned
No full textPIPER-ONE was a Boiling Water Reactor (BWR) simulator installed at the Scalbatraio Laboratory managed by Dipartimento di Costruzioni Meccaniche e Nucleari (DCMN, now DICI) of University of Pisa.
PIPER-ONE was designed and constructed after the Three Mile Accident in 1979 to better understand Small Break Loss of Coolant Accident (SBLOCA) scenarios in Boiling Water Reactors (BWR). A dozen experiments were performed, including the experiment at the basis of the International Standard Problem (ISP) 21 in relation to which some information is given below.
ISP 21 was a Small Break Loss of Coolant Accident (SBLOCA) scenario expected to occur in Boiling Water Reactors. One key feature of the proposed experiment was its Counterpart-Test feature which allowed the comparison with similar experiments performed in the FIST facility (available in US, San Jose, General Electric) and the ROSA-III facility (available in Japan at the JAERI research center of Tokai-Mura).
The paper at the ETPFG meeting discusses key results from the experiments performe
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