Stato dellesperimento CMS 2008 Pierluigi Paolucci Istituto Nazionale di Fisica Nucleare.
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Transcript of UNIVERSITÀ DI PISA GRUPPO DI RICERCA NUCLEARE – SAN PIERO A GRADO (GRNSPG) Any reproduction,...
UNIVERSITÀ DI PISAUNIVERSITÀ DI PISAGRUPPO DI RICERCA NUCLEARE – SAN PIERO A GRADO GRUPPO DI RICERCA NUCLEARE – SAN PIERO A GRADO
(GRNSPG)(GRNSPG)
Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or
any person breaching the aforementioned obligations.
3D nodalization performances of 3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 MASLWR ITF by RELA5-3D©v2.4.2
codecode
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana
September 20-23, 2010 September 20-23, 2010
Title 3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
Authors A. Del Nevo, C. Parisi, F. D'AuriaRevision/Date
0 20 09 2010
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
List of content INTRODUCTORY REMARKS
MASLWR ITF FACILITY
OBJECTIVE OF THE ACTIVITY
NODALIZATIONS DEVELOPED
QUALIFICATION OF THE NODALIZATION
THE EXPERIMENTAL DATA
SIMULATIONS OF MASLWR TESTS 002 AND 003A
IAEA ICSP ON MASLWR
CONCLUSIVE REMARKS
2/23
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Introductory remarks S. M. Modro, J. E. Fisher, K. D. Weaver, J. N. Reyes Jr.,
J. T. Groome, P. Babka, T. M. Carlson, Multi-Application Small Light Water Reactor Final Report, INEEL/EXT-04-01626, December 2003
The Multi-Application Small Light Water Reactor (MASLWR) project was conducted under the auspices of the Nuclear Energy Research Initiative (NERI) of the U.S. Department of Energy (DOE).
Objectives were:
to develop the conceptual design for a safe and economic small, natural circulation light water reactor,
to address the economic and safety attributes of the concept, and
to demonstrate the technical feasibility by testing in an integral test facility
3/23
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Introductory remarks Features of the concept design:
The reactor core and the SGtube bundles inside the vessel
No main primary system piping
Buoyancy forces driving head for primary coolant flow
RPV inside a steel containment vessel filled with water passive ultimate heat sink
4/23
5 years for refueling and maintenance performed by removing the entire module
Test prgram with ITF (MASLWR) has been executed at Oregon State University (OSU)
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Introductory remarks Nuscale Power formed in 2007 with tech-transfer agreement from
OSU and privately funded
NuScale technology developed and tested by Oregon State University, based on OSU, INL and Nexant (Bechtel) DOE NERI program for MASLWR
NuScale Power is commercializing a 45 MWe natural circulation PWR module that can be scaled to meet customer requirements of virtually any size
Base Design is a 12-Module, 540 MWe plant
Designed to meet NuScale Customer Advisory Board
Utility Requirements for near-term deployment in the USA
Seeking US-NRC Design Certification
NuScale Project Organization
5/23
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Oregon State University MASLWR ITF Integral test facility
Scaling
1:3 length
1:254.7 volume
1:1 time scale
Characteristics
Full pressure (11.4 MPa)
Full temperature (590 K)
Fuel rods eclectically heated
Maximum power 398 kW (7.1 kW per 56 rods)
6/23
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Oregon State University MASLWR ITF
It simulates the primary system
the secondary system
the containment system
the water pool
7/23
Containment
Water pool
Primary system Details of the helical-coils SG
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Oregon State University MASLWR ITF Four tests are documented (full set of experimental data not
available)
OSU-MASLWR-001: Inadvertent actuation of 1 submerged ADS valve
OSU-MASLWR-002 & 003A: Natural circulation with core power up to 210kW (used to set up the nodalizations for ICSP participation)
OSU-MASLWR-003B: Inadvertent high containment ADS vent line actuation
8/23
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
Use of RELAP5-3D at GRNSPG/UNIPI
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Objective of the activity GRNSPG participation in the IAEA International Collaborative
Standard Problem (ICSP) on Integral PWR Design Natural Circulation Flow Stability and Thermo-hydraulic Coupling of Containment and Primary System during Accidents
Validation of RELAP5-3D v2.4.2 applicability in modeling integral PWR
Explore thermal-hydraulic and modeling challenges for new small design PWR
3D vs. 1D modeling (in SPF & TPF conditions)
Assessment/accuracy of current TH/SYS (i.e. RELAP5-3D v2.4.2) performance in predicting
HEX in helical coils SG
Choked flow & coupled containment pressurization
NC flow instabilities at reduced mass inventories
Condensation
9/23
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Nodalizations developedGeneral features of the nodalizations
Two independent nodalizations were set up
1D nodalization, which can be run with RELAP5-3D v2.4.2, RELAP5/Mod3.3 (and TRACE code) and 3D nodalization by RELAP5-3D v2.4.2
All relevant parts of the MASLWR ITF are modeled
3 equivalent SG helical-coil tubes (1 for each tube group length)
1 equivalent SG helical-coil tube
The maximum pipe node to node length ratio adopted is 1.2
Sliced nodalization approach
HF option activated chocked flow
Absolute and relative elevations maintained as in facility description
MULTID components (3D nodalization)
3D momentum equations used
10/23
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Nodalizations developed: 1D nodalization 1D nodalization, which can be run with RELAP5/Mod3.3
(and TRACE code)
Reactor coolant system (3 pipe and 2 branch) 41 axial nodes
Secondary system (2 tmdpvol, 1 tmdpjun, 2 vlv, 2 branch, 3 pipe)
High pressure containment vessel (3 pipe, 2 branch, 1 vlv, 1 tmdpjun)
48 axial nodes
Cooling pool vessel (2 pipe and 2 branch)
56 axial nodes
Automatic depressurization systems
Blowdown lines (2 pipe, 2 vlv, 1 branch)
Vent lines (2 pipe, 2 vlv, 1 branch)
Sump return lines (2 pipe, 2 vlv, 1 branch)
11/23
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Nodalizations developed: 3D nodalizationRELAP5-3D COMPONENTS
REACTOR COOLANT SYSTEM
1 MULTID COMPONENT
SECONDARY SYSTEM
2 TMDPVOL, 1 TMDPJUN, 2 VLV, 2 BRANCH, 5 PIPE
HIGH PRESSURE CONTAINMENT VESSEL
1 MULTID COMPONENT, 1 PIPE, 1 VLV, 1 TMDPJUN
COOLING POOL VESSEL
1 MULTID COMPONENT
AUTOMATIC DEPRESSURIZATION SYSTEMS
1. BLOWDOWN LINES (2 PIPE, 2 VLV, 1 BRANCH)
2. VENT LINES (2 PIPE, 2 VLV, 1 BRANCH)
3. SUMP RETURN LIENS (2 PIPE, 2 VLV, 1 BRANCH)
12/23
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Nodalizations developed: 3D nodalization
REACTOR COOLANT SYSTEM (MULTID)
2 radial; 8 azimuthal, 42 axial
672 volumes
Leaning MULTID Leaning TOWER
13/23
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Nodalizations developed: 3D nodalization
HL REGION
HL REGION
(w/ area reduction)
UP
SUMP RETURN (340)
UP
HL REGION
(reduced area)
PRZ
UP
UP
SG
UP
SG
CL
CORE REGION
UPDC
CL
DC
UP
UP
FW inlet (210-220-230)
SL outlet (210-220-230)
ADS VENT (300)
BLOWDOWN (320)
PRZ plate
Grid wires
Upper grid wires
Core flow plate
Sect. A-AAA
Heaters
3 parallel pipes
3 parallel pipes
14/23
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
HPC (MULTID)
2 radial; 4 azimuthal, 48 axial
384 volumes
CPV (MULTID)
1 radial; 4 azimuthal, 56 axial
224 volumes
Nodalizations developed: 3D nodalization
RUPTURE DISK (410)
SUMP RETURN (340)
BLOWDOWN (320)
ADS VENT (300)
HPC
CPV
15/23
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
NC tests (002 and 003A) with core power up to 210kW
Results provided during the 1st ISCP meeting at OSU 15-18 March 2010
Nodalization qualification: the experimental data
16/23
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(K)
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Test -002
RELAP
ΔT across the core presented by B. Woods: Test 002
Specifications according with INEEL/EXT-04-01626, Dec. 2003
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)
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Test -003A RELAP
ΔT across the core presented by B. Woods: Test 003A
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Nodalization qualification: simulations of MASLWR Tests 002 and 003A
17/23
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er [k
W]
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OSU MASLWR Tests 002 and 003A - RELAP5-3D v2.4.2: power exchanged in SG secondary side
EXP - Core powerEXP - Calculated (primary coolant DT)EXP - Calculated (secondary coolant DT)R5-3D - Secondary side
Primary pressure 7.7 MPa
Power
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
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OSU MASLWR Tests 002 and 003A - RELAP5-3D v2.4.2: ΔT across the core
EXP
R5-3D
Primary pressure 7.7 MPa
Nodalization qualification: simulations of MASLWR Tests 002 and 003A
ΔT across the core vs time
18/23
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Nodalization qualification: simulations of MASLWR Tests 002 and 003A
19/23
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0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Flow
[l/m
in]
Power [kW]
OSU MASLWR Tests 002 and 003A - RELAP5-3D v2.4.2: core volumetric flow rate
EXP
R5-3D
Primary pressure 7.7 MPa
core volumetric flow rate vs time
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Nodalization qualification: simulations of MASLWR Tests 002 and 003A
20/23
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Power [kW]
OSU MASLWR Tests 002 and 003A - RELAP5-3D v2.4.2: SG outlet coolant temperature secondary side
EXP
R5-3D
Primary pressure 7.7 MPa
SG outlet coolant temperature secondary side
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
IAEA ICSP on MASLWR The ICSP is divided into two separate tests.
The first test involves a stepwise reduction in primary coolant volumetric inventory in the MASLWR test facility while operating at decay power.
21/23
B. G. Woods, M. R. Galvin, C. J. Bowser, Problem Specification for the IAEA International Collaborative Standard Problem on Integral PWR Design Natural Circulation Flow Stability and Thermo-hydraulic Coupling of Containment and Primary System during Accidents, OSU-ICSP-10001, Augusto 2010
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
3D nodalization performances of MASLWR ITF by RELA5-3D©v2.4.2 code
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
IAEA ICSP on MASLWR The ICSP is divided into two separate tests (cont’ed)
The second test involves a loss of FW transient with subsequent ADS blowdown and long term cooling.
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B. G. Woods, M. R. Galvin, C. J. Bowser, Problem Specification for the IAEA International Collaborative Standard Problem on Integral PWR Design Natural Circulation Flow Stability and Thermo-hydraulic Coupling of Containment and Primary System during Accidents, OSU-ICSP-10001, Augusto 2010
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Any reproduction, alteration, transmission to any third party or publication in whole or in part of this document and/or its content is prohibited unless the University of Pisa – San Piero a Grado Nuclear Research Group has provided its prior and written consent. This document and any information it contains shall not be used for any other purpose than the one for which they were provided. Legal action may be taken against any infringer and/or any person breaching the aforementioned obligations.
Use of RELAP5-3D at GRNSPG/UNIPI
2010 RELAP5 International User’s Seminar2010 RELAP5 International User’s SeminarWest Yellowstone, Montana – September 20-23, 2010
Conclusive remarks The nodalization is developed and set up and ready for the
participation in the ICSP (submission of the pre-test results by the end of December 2010)
GRNSPG/UNIPI will participate with RELALP5-3D v2.4.2
RELAP5/Mod3.3 and TRACE code might be used depending upon the working resources
Performances of the code RELAP5-3D v2.4.2 are presented
The activity is still in progress
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