International RELAP5 User Group (IRUG)
International RELAP5 User Group
The International RELAP5 User Group (IRUG) comprises organizations licensed to use the RELAP5 nuclear power plant safety analysis code, developed at Idaho National Laboratory (INL) since 1979. The objective of IRUG is to serve industry, government, and academia by providing and maintaining a versatile RELAP5 package for safety and engineering analyses of nuclear power reactors. IRUG oversees RELAP5–3D improvements, ensuring it remains a leading reactor safety systems code.
What does IRUG provide?
IRUG provides access to RELAP5-3D on INL’s supercomputers, auxiliary software, user group meetings, training, and support for input design and debugging. Members can report issues via User Trouble Reports.
Annual meetings, held at INL or member facilities, feature training, technical presentations, business updates, and voting on code and group matters.
Who can be an IRUG member?
Membership is open to individuals and organizations, including governmental entities, commercial companies, and academic institutions. Requests for access must be vetted by the Nuclear Computational Resource Center (NCRC). Membership fees, based on usage level (from basic to superuser), are charged annually and adjusted as needed.
Who leads IRUG?
IRUG is led by a chairman, vice-chairman, and secretary. Voting rights are based on membership level, and meeting minutes are distributed prior to each meeting.
IRUG 2024
IRUG 2024 provides a forum for RELAP5 users from around the globe to share their experiences in developing models and performing analyses using the code.
On September 11, celebrate the 45th anniversary of RELAP5 at the 2024 IRUG Banquet. The banquet (food and non-alcoholic beverages) is included with your registration.
September 9 - 13, 2024 | Newpark Resort in Park City, Utah
2024 IRUG Banquet
IRUG Business Meeting
*A current RELAP5-3D license and NCRC approval is required.
Technical Presentations
You are invited to submit a technical presentation to the IRUG Seminar to be presented on September 12 and 13:
- Time Length: 20-minute presentation plus 5 minutes for Q&A
- Deadline: Deadline: July 31. Submit 300 word abstract to [email protected].
Cost (Price and Deadlines Updated July 1)
| Registration Type | Early Bird (until 7/28) | Regular (starts 7/29) |
|---|---|---|
|
Full-Week Attendance* |
$699 |
$799 |
|
RELAP5-3D Intermediate Training* |
$549 |
$649 |
|
In-Person Technical Seminar and IRUG Business Meeting |
$199 |
$249 |
|
Online-Only Technical Seminar and IRUG Business Meeting |
$99 |
$149 |
|
RELAP5-3D training (university student) |
$249 |
$299 |
*Registration closes July 26 (for attendees without prior code approval); August 16 (attendees with code approval)
Hotel Information
| Standard Room | Luxury Suite | 2-Bedroom Suite | Townhome |
|---|---|---|---|
|
$119/night plus taxes and fees |
$209/night plus taxes and fees |
$265/night plus taxes and fees |
$275/night plus taxes and fees |
The RELAP5-3D team has negotiated a group rate for IRUG 2024 at Newpark Resort. The hotel block is only available until Friday, July 26.
Book the group rate online using promo code IRUG0924 or using the direct booking link; by calling 435-649-3600 (extension 0) and giving the group name IRUG 2024; or by emailing [email protected].
Nearby Attractions
- SLC International Airport: 39 miles
- Downtown SLC: 35 miles
- Clark Planetarium: 26 miles
- Homestead Crater: 21 miles
- Hogle Zoo: 21 miles
- Deer Valley: 8 miles
- Main Street Park City: 7 miles*
- Utah Olympic Park: 2 miles*
- Park City Outlets: 1.5 miles*
- Swaner Preserve & EcoCenter: 0.1 mile*
* Free public transportation available
Past IRUG Seminars
The 2023 IRUG meeting was held on December 4 – 8, 2023 in Idaho Falls, ID.
Links to presentations will be available soon.
The 2021 RELAP5-3D Training Workshop and Users Group Seminar was held virtually on September 13 – 17, 2021. There were 15 technical presentations and the meeting included basic and advanced RELAP5-3D training classes.
The meeting provided a forum for RELAP5 users from around the globe to share their experiences in developing models and performing analyses using the code. In addition, the latter part of the seminar was set aside for an executive meeting of the International RELAP5 Users Group. Membership in the User Group was not a condition for attendance at the seminar, and technical papers were encouraged based on any version or application of RELAP5.
| Name | Authors | Organization |
| Application of RELAP5-3D for Liquid Metal Reactor Safety | Giannetti, Narcisi, Ciurluini, Caruso | Sapienza Universita Di Roma |
| Application of RELAP5-3D to High Energy Deposition Transients within TREAT | Blakely | INL |
| Application of Surrogate Models for Best Estimate Plus Uncertainty Analysis by RELAP5 Code | Kinoshita | INSS |
| Development of Best Estimate Plus Uncertainty (BEPU) Application for RELAP5-3D | Choi, Parisi | INL |
| Human Reliability Analysis | Boring | INL |
| JAEA HTTR Secondary System Modeling | Anderson | INL |
| Modern Error Scaling | Epiney | INL |
| Plutonium Fuel Services Irradiation Experiment in the Advanced Test Reactor | Fishler | INL |
| Regression Testing for BR2 RELAP5 Models | Lin, Garner, Licht, Wols | ANL, SCK-CEN |
| RELAP5-3D Architectural Upgrades through Gnu Fortran Adaptation | Mesina | INL |
| Remote RELAP5-3D Information | Mesina | INL |
| Risk-Informed ATF Analysis for Generic PWR & BWR | Zhang, et al | INL |
| Thermal-Hydraulic Modeling of MARVEL Microreactor | Parisi | INL |
The 2019 RELAP5-3D Training Workshop and Users Group Seminar was held in Idaho Falls, Idaho USA from April 15 – 19 2019. There were 20 technical presentations. The meeting also included an advanced RELAP5-3D training class.
The meeting provided a forum for RELAP5 users from around the globe to share their experiences in developing models and performing analyses using the code. In addition, the latter portion of the seminar was set aside for an executive meeting of the International RELAP5 Users Group. Membership in the User Group was not a condition for attendance at the seminar, and technical papers were encouraged based on any version or application of RELAP5.
2018 RELAP5-3D Training Workshop and Users Group Seminar
The 2018 RELAP5-3D Training Workshop and Users Group Seminar was held in Idaho Falls, Idaho USA from April 30 – May 4 2018. There were 20 technical presentations. The meeting also included an introductory RELAP5-3D training class and a half day of training on RAVEN.
The meeting provided a forum for RELAP5 users from around the globe to share their experiences in developing models and performing analyses using the code. In addition, the latter portion of the seminar was set aside for an executive meeting of the International RELAP5 Users Group. Membership in the User Group was not a condition for attendance at the seminar, and technical papers were encouraged based on any version or application of RELAP5.
2016 RELAP5-3D Training Workshop and Users Group Seminar
The 2016 RELAP5-3D Training Workshop and Users Group Seminar was held in Idaho Falls, Idaho USA from October 3-7 2016. There were 19 technical presentations. The meeting also included an Advanced RELAP5-3D training class and a day of training on RAVEN.
The meeting provided a forum for RELAP5 users from around the globe to share their experiences in developing models and performing analyses using the code. In addition, the latter portion of the seminar was set aside for an executive meeting of the International RELAP5 Users Group. Membership in the User Group was not a condition for attendance at the seminar, and technical papers were encouraged based on any version or application of RELAP5.
International RELAP5 Users Group (IRUG) Seminar and Meeting
The 2015 RELAP5 Users Group Meeting was held from August 13 – 14, 2015 in Idaho Falls, ID. There were over 20 technical presentations. The meeting was preceded by an Advanced RELAP5-3D training class.
The meeting provided a forum for RELAP5 users from around the globe to share their experiences in developing models and performing analyses using the code. In addition, the latter portion of the seminar was set aside for an executive meeting of the International RELAP5 Users Group. Membership in the User Group was not a condition for attendance at the seminar, and technical papers were encouraged based on any version or application of RELAP5.
International RELAP5 Users Group (IRUG) Seminar and Meeting
The 2014 RELAP5 Users Group Meeting was held from September 11-12 2014 in Idaho Falls, ID. There were 20 technical presentations. The meeting was preceded by an Advanced RELAP5-3D training class.
The meeting provided a forum for RELAP5 users from around the globe to share their experiences in developing models and performing analyses using the code. In addition, the latter portion of the seminar was set aside for an executive meeting of the International RELAP5 Users Group. Membership in the User Group was not a condition for attendance at the seminar, and technical papers were encouraged based on any version or application of RELAP5.
International RELAP5 Users Group (IRUG) Seminar and Meeting
The 2013 RELAP5 Users Group Meeting was held from September 12-13 2013 in Idaho Falls, ID. There were over to attendees at the meeting and 25 technical presentations. The meeting was preceded by an Introductory RELAP5-3D training class that had over 30 in attendance.
The meeting provided a forum for RELAP5 users from around the globe to share their experiences in developing models and performing analyses using the code. In addition, the latter portion of the seminar was set aside for an executive meeting of the International RELAP5 Users Group. Membership in the User Group was not a condition for attendance at the seminar, and technical papers were encouraged based on any version or application of RELAP5.
International RELAP5 Users Group (IRUG) Seminar and Meeting
The 2012 International RELAP5 Users Group (IRUG) Seminar and Meeting was held October 23-24 in Sun Valley, Idaho.
The meeting provided a forum for RELAP5 users from around the globe to share their experiences in developing models and performing analyses using the code. In addition, the latter portion of the seminar was set aside for an executive meeting of the International RELAP5 Users Group. Membership in the User Group was not a condition for attendance at the seminar, and technical papers were encouraged based on any version or application of RELAP5.
Papers and Presentations from the Salt Lake City Meeting
The 2011 RELAP5 International Users Seminar July 26-28, 2011 Salt Lake City, UT. The following list of presentations that were presented at the conference. Click on one of the following titles to view the presentation.
For additional information please contact:
James R. Wolf
RELAP5-3D Program Manager
Idaho National Laboratory
P.O. Box 1625
Idaho Falls, ID 83415-3870
USA
Tel:(208)526-7725
Fax:(208)526-0528
Email: [email protected]
Papers and Presentations from the West Yellowstone Meeting
The 2010 RELAP5 International Users Seminar September 20-23, 2010 West Yellowstone, Montana. The following list of presentations that were presented at the conference. Click on one of the following titles to view the presentation.
For additional information please contact:
James R. Wolf
RELAP5-3D Program Manager
Idaho National Laboratory
P.O. Box 1625
Idaho Falls, ID 83415-3870
USA
Tel:(208)526-7725
Fax:(208)526-0528
Email: [email protected]
Papers and Presentations from the Idaho Falls Meeting
Papers and Presentations from the Park City Meeting
The 2009 International RELAP5 Users Seminar was held August 10 – 12th in Park City, Utah. The following is a list of presentations from the conference. Click on one of the following titles to view the presentation.
For additional information please contact:
Dr. James R. Wolf
RELAP5 Program Manager
Idaho National Laboratory
PO Box 1625
Idaho Falls, ID 83415
Email: [email protected]
Phone: (208) 526-7725
Papers and Presentations from the Idaho Falls Meeting
The 2008 International RELAP5 Users Seminar was held November 18 – 20, 2008 in Idaho Falls, Idaho. The following list of presentations is in the chronological order in which they were presented at the conference. Click on one of the following titles to view the presentation.
For additional information please contact:
Dr. James R. Wolf
RELAP5 Program Manager
Idaho National Laboratory
PO Box 1625
Idaho Falls, ID 83415
Email: [email protected]
Phone: (208) 526-7725
Papers and Presentations from the Idaho Falls Meeting
The 2007 International RELAP5 Users Seminar was held November 7-8, in Idaho Falls, Idaho. The following list of presentations is in the chronological order in which they were presented at the conference. Click on one of the following titles to view the presentation.
For additional information please contact:
James R. Wolf
RELAP5-3D Program Manager
Idaho National Laboratory
P.O. Box 1625
Idaho Falls, ID 83415-3870
USA
Tel:(208)526-7725
Fax:(208)526-0528
Email: [email protected]
| Title | Author(s) | Organization |
| Welcome & Introduction | Richard R. Schultz | INL |
| Evaluation of Fluid Conduction and Mixing Within a Subassembly of the Actinide Burner Test Reactor | Cliff B. Davis | INL |
| Non-Condensable Gas Solubility Modelling | J. Downing and S. Lockley | Rolls-Royce |
| Experience Using RELAP5-3D for Reduced Enrichment Research and Test Reactor Analysis, the Good and the Not So Good | Floyd E. Dunn | ANL |
| Progress Report: Fortran 90 Conversion | George L Mesina | INL |
| RELAP5-3D Versions and Accounting | Nolan Anderson | INL |
| GAMMA Code for NGNP Air Ingress Analysis | Chang Oh | INL |
| RELAP5-3D Developmental Assessment Plan | Paul Bayless Doug Barber | INL ISL |
| SCDAP/RELAP5-3D – A Mechanistic Tool for Severe Accident Analysis | Joy Rempe | INL |
| Symbolic Nuclear Analysis Package (SNAP) | Glenn Roth | KAPL, Inc. |
| STREAMLINING OF RELAP5-3D | Dr. George L Mesina Joshua Hykes Riley Cumberland Donna Guillen | INL PSU UMR INL |
| NGNP Methods: Summary of Approach and Plans | Richard R. Schultz | INL |
